114results about How to "Even settlement" patented technology

The invention discloses a car varnish spraying and baking room, and belongs to the field of varnish spraying and drying operation of cars or other workpieces. A bottom-layer varnish mist filtering system is arranged underneath of a car varnish spraying and baking room body. The top layer of the room body is provided with an air duct. An air supply system is communicated with the air duct. The bottom-layer varnish mist filtering system is communicated with an exhaust system. The interior of the air supply system and the interior of the exhaust system are respectively provided with a waste gas treatment system. A heating system is further arranged in the air supply system. A lighting system is arranged in the room body. An air-conditioning and filtering system is arranged between the room body and the air duct on the top layer. The car varnish spraying and baking room is reasonable in structural design and convenient to operate, and air in the car varnish spraying and baking room can evenly settle; illumination intensity is high, heating in the room is uniform, and no dead corner exists; besides, sprayed varnish is uniform, the heating effect is excellent, and the surface quality of a car is high after being dried.

The invention discloses a water jackstone blasting mud displacement embanking method. The method comprises the following steps of: filling water jackstone to a specified position layer by layer, simultaneously arranging cartridge bags in the transverse direction and the side direction of a bank body nearby the mud-stone boundary of the water jackstone and the surrounding sludge, uniformly settling the water jackstone in situ, and implementing mud-stone displacement for multiple times by the cyclic operation of 'filling, blasting and filling' to form a stable bank body foundation. The method is suitable for sludge soft foundation treatment of projects such as seawalls, docks, offshore structures and the like in the absence of onshore construction conditions.

The invention relates o the technical field of civil engineering and building construction, in particular to a reinforcement method for a foundation of a silt soft-based cast-in-place box girder support. The reinforcement method is characterized by comprising the following steps of: determining parameters->clearing and leveling a ground->measuring the position of an upper structure and laying off a pile position->carrying out high-pressure rotary jet grouting pile construction->curing->carrying out secondary leveling and compacting->chiseling away the top of the pipe by 50cm and rejecting an unoccupied pile head->paving 20cm grading gravels, flattening and compacting->laying steel-plastic grilles->paving a 30cm grading gravel mattress layer->flattening and compacting->pouring a concrete cushion layer. Compared with the prior art, the reinforcement method has the advantages that the respective principle of a combined process is exerted, the cast-in-place beam deformation requirement is satisfied, the construction process is simple and rapid, the cost is low, the safety risk is small, the permanent and temporary combination is realized, and the follow-up input is saved.

The invention provides a large-caliber heat-supply pipeline uncompensated cold mounting method, comprising the following steps: digging a groove for arranging a heat-supply pipeline, and filling sand into the groove; mounting the heat-supply pipeline and a corresponding pipeline accessory into the groove; carrying out backfilling on the groove; wherein, the direct-buried net depth of the heat-supply pipeline is more than 1.7m; the pipeline accessory comprises an elbow with a large bending radius, bevel angles, a three-way pipe, a tapered pipe, and a valve; wherein, the bevel angles comprise a plurality of small bevel angles smaller than 1 degree or the elbow the radius of which is more than 5.0DN can be used for replacing; moreover, the mounting method provided by the invention is led to be suitable for paving the heat-supply pipelines the main tubular diameters of which are more than DN1000 by the processing technology on each node of the pipeline; moreover, the invention is simple to be mounted, has short construction period, reduces the maintaining cost, and is safe and reliable.

The invention relates to a zonal unequal-strength grouting reinforcement method suitable for the construction of a tunnel adjacent to a building. The method determines the range of the grouting reinforcement area according to the positional relationship between the tunnel and the building; and divides the grouting reinforcement area; Before the tunnel is excavated to the position close to the building, drill holes in the ground between the tunnel and the building and arrange multiple settlement monitoring points at the bottom of the building foundation; carry out unequal-strength grouting in the grouting reinforcement area and strengthen it in different areas ; After the grouting is completed, the excavation construction of the tunnel passing through the building is carried out, and the settlement monitoring point at the bottom of the building foundation is monitored in real time, and it is determined whether to carry out reinforcement grouting in the grouting reinforcement area according to the monitoring results; After the tunnel excavation is completed and the secondary lining is applied, the final effect of the sub-area grouting reinforcement of the tunnel adjacent to the construction of the building is judged by extracting the settlement data of the settlement monitoring points. The invention ensures uniform settlement and coordinated deformation of buildings during tunnel construction, and reduces reinforcement costs.

The invention discloses an air conditioner, a control method of the air conditioner and a storage medium. The control method comprises the following steps: when the air conditioner is in a heating mode, a first air guide plate and a second air guide plate of the air conditioner are controlled to rotate, wherein the first air guide plate is used for opening or closing an air outlet of the air conditioner, the second air guide plate is used for adjusting the air direction of the air outlet, the rotation angle of the first air guide plate is a1, a1 is greater than or equal to 50 degrees and less than or equal to 85 degrees, the rotation angle of the second air guide plate is b1, and b1 is greater than or equal to 157 degrees and less than or equal to 189 degrees; and when the air conditioner is in a non-heating mode, the first air guide plate and the second air guide plate are controlled to rotate, wherein the rotation angle of the first air guide plate is a2, a2 is greater than or equal to 50 degrees and less than or equal to 85 degrees, the rotation angle of the second air guide plate is b2, and b2 is greater than or equal to 10 degrees and less than or equal to 42 degrees. According to the control method of the air conditioner, the cold air blown out of the air outlet can be lifted upwards and the warm air blown out of the air outlet can be pressed downwards, so that the purpose of supplying comfortable air is achieved.

The double controlled powered consolidation method for treating soft foundation includes the first electrically water permeating towards well site for lowering the water level in the construction area and tamping or vibration rolling to densify soil, the subsequent leveling and spreading cushion material, and final shocking and vibrating to densify. The so-called electrically water permeating towards well site is to constitute one DC current system with the well pipe as cathode, metal rod beside the well pipe as anode and wire to connect the well pipe and the anode rod. The said method can raise the bearing capacity of foundation quickly and change the flowing sludge into plastic sludge or solid in 10-15 days.

The invention discloses a construction method of an integrated pipe trench in soft soil. The construction method comprises step 1, digging out a multistage stepped foundation pit and a foundation pit bottom; step 2, digging out a drainage ditch at the top of a site located on each side of the foundation pit; step 3, laying a first geogrid layer at the foundation pit bottom so as to enable the first geogrid layer to cover the first stage of stepped foundation pit to reserve a space; step 4, performing construction on an integrated pipe body; step 5, backfilling the first stage of stepped foundation pit and enabling the reserved space portion to reversely wrap a soil body to be fixed on the integrated pipe body; step 6, laying a second geogrid layer on the second stage of stepped foundation pit so as to enable two ends of the second geogrid layer to be fixed on the integrated pipe body and the second stage of stepped foundation pit respectively to reserve a space, backfilling the second stage of stepped foundation pit and enabling the reserved space portion to reversely wrap the soil body to be fixed on the integrated pipe body; step 7, filling the stepped foundation pit according to the step 6; step 8, backfilling the stepped foundation pit located at the top of the integrated pipe body. According to the construction method of the integrated pipe trench in the soft soil, the shear bearing capacity of the foundation pit backfilling soil body can be improved, the settlement condition of the backfilling soil body is improved, and accordingly the settlement of the cross section tends to be uniform, the service life of a surface road is extended, the cost is low, and the process is convenient.

The invention relates to a railway roadbed structure for reducing roadbed settlement deformation through an opposite-pulling rib U-shaped groove. The U-shaped reinforced concrete groove with an upwardnotch is formed in the bottom and filled with a roadbed stacking and filling material, the top of the roadbed stacking and filling material is flush with the top edge of the U-shaped reinforced concrete groove and provided with railway ballast, and a railway track structure is arranged above the railway ballast; and opposite-pulling ribs are transversely arranged in the U-shaped reinforced concrete groove, and the two ends of each opposite-pulling rib extend out of the U-shaped reinforced concrete groove. On the one hand, lateral deformation of a roadbed body is greatly restrained through theU-shaped opposite-pulling reinforced concrete groove, roadbed body stuffing is stacked and filled or concrete is poured within the limited space with lateral confinement, and roadbed body settlementis controlled to a great degree; and on the other hand, the occupied width of the bottom of a roadbed is greatly reduced, and plenty of requisition land and plenty of foundation treatment area are saved.

The invention relates to a collosol-coating preparation method of lithium iron phosphate being the positive electrode material of a lithium ion battery, pertaining to the technical field of lithium ion battery. The technique of the invention comprises the following steps of: 1. preparing starch suspension: starch is dispersed in distilled water and then a ferric source, a lithium source compound and a phosphorus source compound are mixed into the starch suspension; 2. compound dispersion: firstly, shear liquid-phase dispersion is conducted and colloid grinding is then conducted; 3. hydrolysis: after dispersion, the suspension is put into a reaction kettle at a temperature slowly increasing to 85-100 DEG C and constant temperature is kept for 1-5h; 4. drying: a gelatinous solution is added into a casting machine and a base body is coated with a pulp layer with the thickness of 1-5mm by a drawing knife and the pulp layer is dried at the temperature of 80-110 DEG C to form compact dried gel; and 5. heat treatment: the dried gel is arranged in a gas sintering furnace and heat treatment is conducted at high temperature of 600-800 DEG C under the protection of inert gas to obtain a product. The preparation method has the advantages of high tap density of lithium iron phosphate, high discharge capacity, simple technique, stable product performance, high yield, applicability to industrialization and the like.

The invention discloses an environment-friendly iron-antimony composite oxide catalyst. A combined treatment process of a homogeneous coprecipitation process and a hydrothermal process is employed during preparation of the catalyst; the technical means of azeotropic distillation is used for post-treatment; and the oxide of iron and the oxide of antimony in the metal composite oxide can form a solid solution, and in terms of the mol ratio of metallic elements, a mol ratio of iron to antimony is 0.5 to 2.0. The catalyst prepared in the invention shows excellent denitration activity, N2 selectivity, reaction stability, water resistance and sulfur tolerance in a range of 200 to 400 DEG C.

The invention discloses a pyrethrin hot fogging agent and a preparation method and application thereof. The pyrethrin hot fogging agent consists of the following components in percentage by mass: 0.5 to 5.0 percent of raw pyrethrin, 5.0 to 10.0 percent of surfactant, 0.2 to 1.0 percent of synergist, 0.5 to 1.0 percent of stabilizing agent, 1.0 to 5.0 percent of anti-freezing agent, 3.0 percent of anti-shifting agent and the balance of solvent. The hot fogging agent can be volatilized to form micro drops of which diameter is several microns, and the micro drops can be diffused and suspended in the air for a long term, effectively contacted with organisms, voluntarily diffused and permeated to crowns of fruit trees and uniformly settled on each part of a host, so the settling effect is good and the prevention and control efficiency is high; the hot fogging agent has strong adhesive force to the surface of plants and rainwater washing resistance, and has long persistence; compared with conventional ground spraying, the hot fogging agent has the advantage of high work efficiency in use; compared with ultralow-capacity spraying of an airplane, the hot fogging agent has the advantage of low prevention and control cost; and the hot fogging agent is not required to be blended with water during spraying, and is particularly suitable for preventing and controlling trypetids in fruit trees at the places of traffic inconvenience and difficult water sources and on the hilly land.

The invention relates to a bridge abutment structure capable of preventing bumping at a bridge head and a preventing method. The bridge abutment structure comprises an abutment cap and a parados. The parados is arranged at one end of the abutment cap and is perpendicular to the abutment cap. A well hole is formed in the middle of the abutment cap, the bottom of the well hole is of a conical structure, the bottom of the well hole is filled with sand, a pendulum type support is arranged above the sand, the part between the side of the support and the inner wall of the well hole is filled with an elastic padding layer, a sand discharging pipe is arranged in a sand discharging port in the bottom of the well hole, an end cap is arranged in the port of the sand discharging pipe, and an adjusting plate is arranged on the top of the parados in an overlapped mode. Uniform settlement of a bridge surface is achieved by adjusting the height of the support and the elevation of the parados of the bridge abutment, differential settlement of the bridge head is eliminated, the bumping phenomenon caused by sedimentation of a bridge head embankment can be conveniently eliminated, the structural design is simple, and adjustment is convenient; original using function of a bridge are not affected, and the bridge abutment structure can be used for an old and new bridge structure of a municipal administration highway, and can also be used for track traffic projects.

The invention discloses a roasting flue gas heat recovery and dust suppression system of a zinc oxide production device. The roasting flue gas heat recovery and dust suppression system comprises a box body, wherein a flue gas inlet and a flue gas outlet are formed in the box body, a plurality of heat exchange assemblies are longitudinally arranged on the box body, each heat exchange assembly comprises a feed box, a discharge box and a plurality of heat exchange tubes which are used for communicating the feed box with the discharge box, all of the heat exchange tubes are positioned on the inner wall of the box body, cooling media respectively flow into each feed box, then flow to each heat exchange tube and flow out from each discharge box at last, and air mechanical force is regularly sent to shake off dirt and dust on the outer walls of the heat exchange tubes, so that dirtiness resistance is reduced, and the flue gas heat exchange effect is guaranteed. According to the heat recovery and dust suppression system, the plurality of heat exchange assemblies which are mutually independent are arranged on the box body, the heat of a part of flue gas is carried away by each heat exchange assembly, so that gradual cooling of the box body is realized, and a stable controllable temperature gradient field is formed in a heat exchange flue due to the change of the flue gas temperature, so that gradual dust suppression is realized, and the phenomenon that a pipeline is blocked by powdered zinc oxide which is suddenly cooled due to temperature jump is avoided. The roasting flue gas heat recovery and dust suppression system has the advantages of simple structure and reliability in operation.

The invention discloses a long and short pile plate structure for controlling differential settlement of a highway transition section and a construction method thereof.The long and short pile plate structure comprises a transition section and a common section, reinforced concrete slabs are arranged on the transition section and the common section, and a plurality of prestressed pipe piles are arranged in the transition section and located below the reinforced concrete slabs; a plurality of cement mixing piles are arranged in a common road section below the reinforced concrete slab, the prestressed pipe piles and the cement mixing piles are directly and rigidly connected with the reinforced concrete slab, the lengths of the prestressed pipe piles are gradually decreased in the bridge road direction, and the pile intervals of the cement mixing piles are gradually decreased in the road bridge direction. The long and short pile plate structure and the construction method are good in reinforcing effect, reliable in technology, economical and reasonable, and uniform transition of longitudinal rigidity of the highway bridgehead transition section in the soft soil area can be achieved.

The invention provides a construction method for water-saturated soft soil foundations. The method comprises the steps of construction preparation, clay heavy curtain pile sealing wall construction, drain board insertion, pipe network laying and equipment installation, film pressing ditch digging, film sealing and pre-pressing. Compared with the conventional soft soil foundation processing methods such as dynamic compaction consolidation and powder-jetted piles, the method has the advantages of low production cost, remarkable consolidation effect, short construction period, energy conservation, environmental protection and low noise.

The invention relates to a piled raft foundation anti-floating structure and a construction method. A basement side wall is connected with a supporting pile through transverse connecting reinforcing steel bars, cast-in-situ bored piles are arranged below a basement base plate in a drilled mode, and a broken stone hardcore, a backfill lime earth layer, a reinforced concrete water-stop sheet, a soft soil layer and a relative supporting layer are sequentially arranged at the lower portion of the basement base plate from top to bottom; the reinforced concrete water-stop sheet is located close to the bottom end of a waterproof curtain, and closed waterproof space is formed between the reinforced concrete water-stop sheet and the waterproof curtain; the reinforced concrete water-stop sheet is connected with the supporting pile through connecting reinforcing steel bars, holes are formed in the reinforced concrete water-stop sheet at intervals, and anti-floating anchor rods are inserted into the relative supporting layer in a penetrating mode through the holes. The piled raft foundation anti-floating structure has the advantages that the good bearing performance and the good anti-floating performance are achieved, damage to the portion where a raft is connected with a piled raft is small, the base plate is not prone to leakage, the construction speed is high, and the manufacturing cost is low; the good technical economy benefits are achieved.

The invention belongs to the field of box-type transformer substation foundations, and discloses an assembly type box transformer substation foundation and a field construction method. The assembly type box transformer substation foundation comprises bottom plates, stand column bases, stand columns, connecting steel plates, connecting bolts and the like; and due to the design of six modular bottomplates, when box-type transformer substation with different sizes need to be adapted, only the modular bottom plates need to be added or expanded in the form of removal. When the box-type transformersubstation foundation needs to be shifted, only the foundation soil needs to be dug out, the welding part of the box-type transformer substation and the box-type transformer substation foundation iscut off, then the box-type transformer substation foundation is integrally disassembled and can be put into the next engineering for use. The method has the advantages of being reasonable in structure, clear in force transmission path, simple to assemble, short in construction period, low in manufacturing cost, capable of being repeatedly used, suitable for box-type transformer substations with various specifications, small in environmental disturbance and the like.

An aerobic bioreactor processing system for a simple landfill is composed of an aerobic bioreactor, a circulating fan, a deduster, an exhaust fan, a deodorizing device, an exhaust barrel, a torch and a heater. The aerobic bioreactor is composed of anchoring ditches, a cover film, gas injection wells, gas extraction wells, rainfall water collecting wells, a recharge device, a simple landfill engineering boundary, a simple landfill flat surface and an online detector 17. After flattening and slope finishing of the simple landfill, the wells are dug in the simple landfill flat surface, the film covers the simple landfill flat surface, and the rainfall water collecting wells are dug around the landfill boundary; and after landfill gas in the landfill is extracted, forced circulating ventilation is conducted on refuse dump bodies, and the stability of the landfill is improved. Through optimization of system configuration, the unit structure and an operation method, the aerobic bioreactor processing system is suitable for treating and repairing the simple landfill, and the operation cost is lowered.

The invention discloses a uneven settlement control structure and a construction process for an open trench tunnel and relates to the field of tunnel construction. The uneven settlement control structure mainly comprises a beam foundation used for supporting a tunnel structure; the beam foundation is formed by overall pouring of expanded longitudinal beams, cross beams and a cushion board; the expanded longitudinal beams are arranged at the two sides below a tunnel; the crossbeams are longitudinally and uniformly arranged on the expanded longitudinal beams; the cushion board is arranged on thecrossbeams; the tunnel is arranged on the tunnel so that the cushion board can cooperate with the longitudinally and uniformly arranged crossbeams to receive the stress in a synergetic manner, and the uneven settlement among pipe joints of the tunnel can be controlled and reduced.

The invention provides a method for determining the staggered distance between dual coal seam upper-lower simultaneous mining working faces in the propelling direction, and belongs to the technical field of coal mining. The method comprises the steps that the ideal staggered distance range is found out and obtained; according to the ideal staggered distance range, an ultimate bearing capacity computational formula during plastic slip of rock and soil is utilized to obtain a computational formula of the maximum depth H<max> of an upper coal seam bottom plate destruction region under the ultimate bearing pressure condition, and thus a computational formula of the maximum horizontal distance L<max> of an upper coal seam bottom plate broken rock stratum is obtained; a pressure-stabilizing mechanical model and a pressure-reducing mechanical model for the propelling direction of upper-lower coal seam working face simultaneous mining of dual coal seam mining are established, thus the maximumhorizontal distance of the upper coal seam bottom plate broken rock stratum, the bottom plate stress transfer angle and the spacing between an upper coal seam and a lower coal seam are obtained, and acomputational formula of the staggered distance in the pressure-stabilizing propelling direction and the pressure-reducing propelling direction is determined; and the computational result in the step3 is corrected. According to the method, the mine pressure strength of the lower coal seam working face and the earth surface damage degree during simultaneous mining of the dual coal seam superposition regions can be effectively lowered, and efficient and environment-friendly mining of the dual coal seams is achieved.

The invention discloses an engagement device for preventing bone fusion of a fibula truncation part. The engagement device comprises a first engagement part, a second engagement part and an elastic part, wherein the first engagement part is used for engaging a first truncation end of a truncated fibula positioned at the outer side of a shin bone; the second engagement part is used for engaging a second truncation end of the fibula; the elastic part is engaged between the first and second engagement parts, so that the elastic part can be subjected to elastic deformation due to the acting force between the first and second engagement parts; and if the engagement device is engaged at two ends of the fibula truncation part, rigid re-fusion of the truncated fibula can be effectively prevented so as to remove the supporting force at the outer side of the shin bone of a patient, so that a shin bone platform can be settled uniformly.

The invention provides a buried natural gas pipeline foundation settlement online monitoring and safety research method. The method comprises the steps that a pipe-soil three-dimensional model is established, and settlement monitoring key points are determined; the signal transfer system transmits data acquired by the settlement measurement sensing system to a remote terminal server, so that long-term online settlement monitoring is realized; predicting the settlement condition of the next stage based on the prediction model and the B-P neural network model according to the actually measured big data of pipeline settlement; fourier series expansion is carried out on settlement data to obtain a pipeline harmonic settlement curve, the pipeline harmonic settlement curve serves as a loading condition to be input into the three-dimensional model, and the influence of current settlement on the pipeline structure is analyzed in combination with pipeline stress. At present, research on real-time on-line monitoring of pipeline settlement at home and abroad is less, the method has many advantages compared with manual field measurement, and managers can know the current situation of the pipeline, find abnormal states, take prevention measures in time and guarantee long-term safe operation of the pipeline.

The invention relates to a connecting passage construction method. The connecting passage construction method comprises the following steps that S1, a connecting passage is constructed after an underground space connected with the connecting passage is completed, and an annular protective shell is arranged on the outer side of the connecting passage in a steel bar embedding mode through an underground diaphragm wall connected with the connecting passage, so that the connecting passage is fixed; S2, a post-cast strip is reserved between the connecting passage and the underground diaphragm wall; S3, the portions, within the range of a connecting opening, of a lining wall and the underground diaphragm wall are chiseled away; S4, reinforcing columns are arranged on the floor where the connecting opening is located and the floor below correspondingly; and S5, a top beam is arranged on the upper portion of the connecting opening, and a prying opening is formed in the lower portion of the connecting opening. According to the connecting passage construction method, the connecting passage is constructed after the underground space is completed, and the connecting opening is constructed after the connecting passage is completed, so that uniform settlement of the underground space and an overground structure is facilitated, and the construction safety is improved; and the connecting passage construction progress and the outdoor road construction progress are accelerated, roads nearby are made unobstructed, and the influence on material transportation of other projects around is reduced.

The invention relates to an advanced treatment process for coking wastewater. The advanced treatment process comprises the following steps of (1) filtration, (2) magnetic separation and purification,(3) sedimentation treatment through addition of a low-temperature coagulant aid, (4) electrocatalytic oxidation, (5) biological treatment and (6) filtration through a membrane filter. The advanced treatment process for the coking wastewater has the advantages that the low-temperature coagulant aid is adopted to improve the coagulation effect of the lower-temperature coking wastewater, thereby being conductive to the subsequent purification efficiency of the coking wastewater; then electrocatalytic oxidation is carried out, hydroxyl radicals with very high oxidation potentials are generated, organic matter in the wastewater is oxidized on a large area, and the aeration plays a stirring role and can also promote the discharge of dross in the process of electro-catalysis; the coking wastewater of which COD and ammonia nitrogen in effluent both meet the standards can be prepared by using the above process to treat the coking wastewater.

The invention provides a double-pipe construction method for a static pressure pipe-sinking carrier cast-in-place pile. The carrier pile is manufactured through a static pile driver, an inner pipe and an outer pipe. Throwing of a carrier concrete material is completed at a time, the pile-forming period is shortened, energy is saved, and the environment is protected; and the pull resistance of the manufactured pile is improved remarkably. The double-pipe construction method includes the following steps that firstly, a site is cleaned, surveying and setting-out are conducted, and the pile driver is moved to a station; secondly, the inner pipe and the outer pipe are pressed to the designed elevation; thirdly, concrete required by a carrier is thrown into the inner pipe at a time; fourthly, the inner pipe and the outer pipe are up-pulled to the set height together, and a space formed when the inner pipe and the outer pipe are up-pulled can be filled with the carrier concrete automatically; fifthly, the inner pipe is lowered, the bottom end of the inner pipe extends out of the bottom end of the outer pipe, the inner pipe and the outer pipe are pressed downwards, the downward pressing force and the elevation reach the preset numerical value, and the expanded carrier is formed; sixthly, the inner pipe is lifted out of the outer pipe; seventhly, concrete is poured into the outer pipe, or a reinforcement cage is placed in the outer pipe firstly, and pile body concrete is poured; and eighthly, the inner pipe is put into the outer pipe, the outer pipe is up-pulled while vibrating, and the pile is formed.

The invention discloses a prograding mudflat foundation reinforcing device and a construction method thereof. The reinforcing device comprises hollow steel plates, hollow steel cylinders, steel strands, solid steel balls, a sand cushion layer, a vacuum device, an electro-osmosis device and a vacuum sealing film. The hollow steel plates are transversely laid, the hollow steel cylinders are arrangedat the joints of the hollow steel plates, and the hollow steel plates and the hollow steel cylinders are connected into a whole through bolts. One ends of the steel strands are connected with the solid steel balls, and the other ends of the steel strands are connected with a positive electrode of the electro-osmosis device and fixed to the middle of the hollow steel plate. The hollow steel cylinders are connected with a negative electrode of the electro-osmosis device. The sand cushion layer is arranged on the upper portions of the hollow steel plates, the vacuum device is embedded in the sand cushion layer, and the vacuum sealing film is laid at the top of the sand cushion layer. The method comprises the following steps that the solid steel balls, the hollow steel plates, the hollow steel cylinders, the sand cushion layer, the vacuum device, the electro-osmosis device and the vacuum sealing film are installed; and vacuumizing, sedimentation consolidation, electrifying, sedimentationconsolidation and vacuum consolidation are conducted. According to the prograding mudflat foundation reinforcing device and the construction method thereof, the shear strength of soil and the bearingcapacity of a foundation are improved while it is guaranteed that the sedimentation and the sedimentation difference are within a control range, and the water content is reduced.

The invention discloses a ground uniform settlement structure and a construction method in order to overcome the defects that indoor ground settlement is nonuniform and consequently normal use of buildings is affected. The ground uniform settlement structure comprises engineering piles and cast-in-situ members. Pile end support stands are disposed on the engineering piles; each cast-in-situ member comprises an L-shaped guiding portion and a long strip supporting portion; limiting parts are arranged at the edges, close to the engineering piles, of the supporting portions in a casting mode correspondingly; abutting joint plates which are opposite to the limiting parts are disposed on the upper portions of the pile end support stands on the engineering piles; the outer side faces of the limiting parts are limiting planes; buffer pads are mounted between the limiting planes and the abutting joint plates; the guiding portions are disposed on the outer sides of the pile end support stands; prestress springs are connected between the supporting portions and the pile end support stands; arched reinforcing ribs are disposed between the guiding portions of every two adjacent cast-in-situ members; compacted soil is located under the cast-in-situ members; deep fill soil is buried between the guiding portions of every two adjacent cast-in-situ members; rigid ground is located between the supporting portions of the every two adjacent cast-in-situ members; and inserting ribs are connected between the rigid ground and the supporting portions.

The invention discloses a method for calculating the paving interval of geogrids for treating bump at bridge-head through abutment back reinforcement. The method comprises the steps of S1, acquiring geological prospecting data of a foundation where a reinforced abutment is located, calculating consolidation settlement of the foundation according to actual foundation treatment mode, roadbed filling type and design test data, and then conducting anticipatory computing of post-construction settlement of the foundation; S2, deducing a geogrid stress solving equation according to the elastic membrane theory, and calculating the paving interval of the geogrids in the anchoring treatment mode and reverse packaging treatment mode according to the practical treatment condition of the geogrids. According to the method, the interval of the geogrids under anchoring and reverse packaging conditions is calculated by means of a model which better accords with the practical stress condition of the geogrids. By using the interval calculation method for guiding design and construction of the geogrids, differential settlement of a transition section of a bridge can be well treated.

The invention relates to a subgrade filling method for physical improvement of fine silt, which is characterized by comprising the following steps: cleaning ground, setting gravel blind ditches, filling enveloping soil, heaping up edges with sand bags, paving and leveling sand, controlling water content, rolling, filling a top seal layer, and embedding settlement plates and displacement observation piles respectively in characteristic sections of a sand-filled subgrade as required to carry out sedimentation and displacement observation of the sand subgrade. The application of the constructionprocess has good economic and social effects. On one hand, the price of fine sand is relatively low, and the fine sand has the characteristics of good water stability, uniform settlement, and little influence from water and unfavorable seasons during construction, and the construction period can be greatly shortened during construction; on the other hand, the successful application of the processcan avoid damage to local resources and environment when soil is borrowed, can dredge a channel and protect the ecology. In some areas restricted by natural geological conditions, fine silt can be used as subgrade filler, and by adopting the scheme, basic requirements for subgrade construction can be met.