5784 results about "Water seepage" patented technology

The invention discloses a device and method for measuring swelling representation parameters of swelling soil. The device for measuring the swelling representation parameters of the swelling soil comprises a sample container, a soil body permeation coefficient measurement part, a jacking cylinder applying a vertical load, a dial indicator for testing a swelling soil sample to generate vertical deformation, and a deformation pipe used for testing water seepage coefficients of the swelling soil. The method comprises the steps of: immersing the swelling soil sample into water for swelling stably, measuring the water seepage coefficients; and then electrically heating the swelling soil sample to ensure that the swelling soil sample is dehydrated and contracted stably, and measuring the permeation coefficients of the swelling soil. Therefore, the invention can be used for measuring water seepage and permeation coefficients of the swelling soil in a repeatedly-swelling deformation process by controlling temperature and water content changes of the swelling soil sample in the sample container so as to reflect the change of a fracture and a soil body structure inside the soil body of the swelling soil in the repeatedly-swelling deformation process. In addition, the sample container of the device is connected with an external pipeline through each joint arranged on the sample container, therefore, data measurement in an experiment process is facilitated, and measurement precision of data is increased.

The invention discloses a PVC foam wood / plastic composite material and relates to the technical field of composite materials. The PVC foam wood / plastic composite material is made from the following raw materials in parts by weight: 20-70 parts of PVC resin powder, 0-55 parts of wood flour, 5-40 parts of calcium carbonate powder, 0.1-0.5 part of sodium bicarbonate, 0.3-0.6 part of an azo-compound or hydrazine derivative, semicarbazide compound or nitroso-compound, 2-10 parts of a foaming regulator, 1.5-6 parts of a composite stabilizer, 0.7-2.1 parts of a lubricant, 0.5-1.2 part of soybean oil, 2.5-5.5 parts of an impact modifier, and 0.5-3 parts of a processing agent. The PVC foam wood / plastic composite material provided by the invention has the advantages of strong chemical stability, high strength, resistance to acid / alkaline corrosion, resistance to water seepage, flame retardancy and low cost.

The invention relates to permeable bricks inlaid with nanometer titanium dioxide and a preparation method thereof and belongs to the field of building materials. According to the preparation method provided by the invention, titanium dioxide precursor turbid liquid is evenly sprayed into holes of permeable brick base bodies, and then the permeable brick base bodies are dried and calcined for 10-30 min so as to obtain the permeable bricks inlaid with nanometer titanium dioxide and anatase type nanometer titanium dioxide is uniformly inlaid in the holes of the obtained permeable bricks. The permeable bricks can effectively degrade contaminants in water seepage passing though the permeable bricks and some organic contaminants attached to the surfaces of brick bodies in a manner of photochemical catalysis and also can degrade a part of gaseous pollutants in air in a manner of photochemical catalysis.

The invention relates to a tunnel lining self waterproof drainage system, which comprises a surrounding rock bearing arch, a cast-in-place cement main waterproof layer, a pre-cast cement arch sheet layer and longitudinal drainage channels. Arch sheet layer construction gaps and cast-in-place cement main waterproof layer construction gaps are interlaced. The tunnel lining self waterproof drainage system is characterized in that movable drainage grooves are fixedly arranged below the pre-cast cement arch sheet layer of centralized bursting water seepage points of loose surrounding rocks, and form arch sheet drainage spaces with an inwards concave surface of the pre-cast cement arch sheet layer, the parallel drainage spaces distributed along the section of a tunnel form a movable drainage channel, the longitudinal drainage channels are communicated and are arranged on two sides of the movable drainage channel and the pavement of the tunnel, pre-embedded water guiding pipes are arranged at the centralized bursting water seepage points, a water outlet end of each pre-embedded water guiding pipe is arranged on the inwards concave surface of the pre-cast cement arch sheet layer, and pre-embedded grouting pipes are arranged outside the pre-embedded water guiding pipes. The invention completely solves stubborn problems of the tunnel on cracking, seeping, frost heaving, ponding or freezing and the like on the premise of not arranging an interlayer waterproof layer and a hidden seepage water blind pipe drainage system, and the tunnel lining self waterproof drainage system disclosed by the invention has a simple structure and is convenient to construct.

This invention relates a method for combined precipitation with pit phreatic water and aquifer layers including the following steps: applying one well structure to a precipitation well, closing a controllable water valve when evacuating the phreatic water, analyzing 3-D underground water seep to determine limit elements, pumped volume and influence radius, when the dig reaches to a water-isolation layer, the water in the aquifer layer is pumped to reduce water pressure to determine the dig depth, water-pump volume, orifice of wells, numbers, the influence radius of water power fall and sedimentation of surrounding ground using a method for computing limit elements determined based on 3-D underground water seepage and ground sedimentation based on plane diameters of the pit, dig depth, embedded depth of underground wall and structure condition of the aquifer layer.

The invention discloses a foamed ceramics energy saving and heat preservation decorative wall brick and a manufacture method thereof, including the steps of conducting ball milling on 15-65 percent wt of industrial residues, 10-45 percent wt of plastic clay, 15-60 percent wt of solvent, 10-45 percent wt of pore-forming agent with the fineness being 1-100mum and proper amount of water to form slurry; spray drying or dehydration and clay preparation, and forming powder material or clay segment through staleness; and implementing pressure forming to make billet which is burned under heat preservation at temperature of 1140-1240 DEG C to finally form the foamed ceramics wall brick. The wall brick can be used not only for the heat preservation and decoration of external walls, but also for indoor heat preservation and decoration, and the external wall and the indoor space can realize the organic combination of uniform heat preservation and decoration, which agrees with the development direction of heat preservation material industry of external walls. The wall brick has the advantages of: I. high temperature resistance, acid and alkali-resistance, good chemical stability, no ageing, strong durability, long service life, no generation of heat channel and good adhesive fixity; and II. difficult water seepage and crack, strong anti-corrosion capacity, uneasy deformation and damage, simplification of mounting, laying and sticking procedures, convenience for construction, relief of labor intensity and decrease of material consumption quantity.

The invention relates to an underground (underwater) building waterproof device, and in particular to a vertical water-stop structure for a concrete engineering expansion joint as well as a manufacturing and construction methods for the same. The vertical water-stop structure comprises a deformation sheet and channel steel, and is characterized in that the deformation sheet is longitudinally arranged, one half is pre-buried in first-stage concrete, the other half is bulged out of a concrete section and externally arranged in a rectangular channel steel opening, and the channel steel is provided with a fixing element and filled with maltha; the surface of the channel steel opening and the section of the first-stage concrete are provided with asphalt felts at the both sides of the deformation sheet, the exposed fixing element is detached after asphalt is cooled, and then second-stage concrete is arranged. According to the vertical water-stop structure disclosed by the invention, the problem of water seepage of a water conservancy project due to the differential settlement or diastrophism of a stratum can be solved, and moreover, labour can be saved and construction period can be shortened.

The invention relates to rebar grouting connecting element sealing materials, and a preparation method and application thereof. The materials are prepared by the following raw materials, by weight, 100 parts of cement, 0-80 parts of activity admixtures, 0.01-10 parts of water reducing agents, 0.01-10 parts of early strength agents, 0.01-30 parts of expanding agents, 0-30 parts of adhesion agents, 0.01-50 parts of plastic retaining agents, 0.01-10 parts of starch ether, 0-100 parts of powder stuffing and 10-300 parts of quartz sand. The sealing materials are prepared through stirring and blending and can be used for sealing process before rebar grouting connection. Compared with the prior art, the sealing materials are good in plasticity, adhesive power and drop smoothness resistance, slurry does not contract, and defects that cracking, water seepage, dropping off and the like are easily generated due to the fact that common cement mortar is used for sealing are overcome. The sealing materials have excellent construction performance, and can be applied to quick extrusion and jetting construction of a caulking gun or a power-driven caulking device. After the sealing materials are adopted to carry out a sealing process, rebar connecting grouting construction can be carried out after one day, and construction efficiency can be greatly improved.

The invention relates to a layer stranded optical cable, a preparation method thereof and a device for the method, belonging to the technical field of optical fibers and optical cables. The layered stranded optical cable comprises a cable core, a protective layer coated outside the cable core and a jacket layer extruded and coated outside the protective layer, wherein the cable core comprises a central reinforcer and more than two loose casings twisted with the central reinforcer; the central reinforcer is formed by a steel wire coated with grease on the external wall and a plastic cushion layer extruded and coated outside the steel wire; and the loose casings respectively contain a plurality of optical fibers. The layered stranded optical cable is characterized in that a groove is formed on the external wall of the steel wire; and the plastic cushion layer is embedded into the groove. The invention can ensure that the fine combination of the plastic cushion layer and the steel wire can be guaranteed to avoid the longitudinal water seepage of the cable core under the premise that the grease coated outside the steel wire is not required to be eliminated; the groove is formed on the surface of the steel wire capable of forming the central reinforcer before entering a plastic extruding machine for the plastic cushion layer so that the plastic cushion layer is reliably combined with the steel wire by utilizing the groove; and an added steel wire grooving machine has simple structure and has no interference to other machinery.

The invention discloses a shield construction method for a two-line overpass with small radius, shallow covering soil and large longitudinal slope complex linear tunnel, which belongs to the technical field of tunnel construction. The construction method of the present invention includes the following steps: determining the advancing sequence of the two-line interchange, selecting a shield machine type, taking auxiliary strengthening measures for the ground surface, strata, and segments, shield advancing, axis control and construction monitoring, and shield tunneling. In the present invention, since the shield increases the hinged part, the sensitivity of the shield is increased, and the control of the axis of the tunnel is more convenient; a suitable reinforcement and pressure scheme, a segment typesetting method and a stiffening rib scheme are selected to make the outer arc of the segment broken. Cracks and segmental water seepage can be improved; and through high-frequency monitoring and information feedback, the shield propulsion parameters are strictly controlled. By taking the above measures, the deformation and displacement of the ground surface and the tunnel are effectively controlled, which effectively reduces the cost of tunnel construction and The complex influence of the post-construction tunnel ensures the smooth progress of the construction and the effective control of the tunnel deformation.

The invention discloses a testing device and a testing device method for simulating collapse of tunnel surrounding rock under conditions of rainfall and underground water seepage. The testing device comprises a model testing box, a rainfall adjustable simulating system, an underground water seepage simulating system, an underground water supplying system, a water content testing system, a stress monitoring system, a digital radiography noncontact measuring system and an optical fiber bragg grating displacement monitoring system. By simulating a progressive failure process of tunnel weak broken surrounding rock under the action of seepage of surface water and underground water, mechanical behaviors of crushing the surrounding rock under different rainfall conditions and different underground water seepage path conditions are quantitatively researched. By obtaining multiple-physical field information in a tunnel surrounding rock collapse process, multi-information features in different evolutionary phases and internal links of information of all fields of the collapse are analyzed, a progressive failure process and fracture morphology and ranges of the tunnel weak broken surrounding rock under different factors are determined, and the effective basis is provided for disclosing a progressive failure principle and a dynamic pressure arch effect of the weak broken surrounding rock under conditions of rainfall and underground water seepage.

The invention discloses a construction method in the railway field, in particular relates to a construction method of a large-span tunnel passing through a rapid transit railway with a shallow tunneling process. The construction method comprises the following construction steps of: 1, advance supporting and pre-reinforcing; 2, partial excavation and millisecond blasting; and 3, short-bench excavation support construction. In a construction process, grouting technologies such as curtain grouting, full-section grouting, radial grouting and the like are used for blocking an underground water seepage channel to control the loss of underground water; and in the construction process, an automatic high-precision monitoring method and a fixed target high-precision monitoring method are adopted for carrying out monitoring to ensure that the influence of tunnel passing-through construction on rapid transit railway tracks on the ground surface is immediately found. By using the construction method, the safety of the tracks can be ensured when a newly-built railway passes through ballastless tracks.

The invention discloses a video-supporting remotely-controlled fishing biomimetic robotic fish with dual joints to which the power is supplied by coordinately swinging dual tail fins in an opening and closing way and coordinately swinging dual pectoral fins. The biomimetic robotic fish has the characteristics of high speed, flexible turning, high water resistance, high stability, support of fishing, long working time and support of video. The key technology of the biomimetic robotic fish is that: a gear shaft handle is used for pushing a U-shaped shaft arm actuating device, so that the swinging of the tail fins and the dual pectoral fins has the characteristics of continuousness, rapidness, stableness, high efficiency, strong force and the like; a bolt is used for driving a gear arm running device by rotating, so that fish body steering, closing of a fish mouth and receiving and releasing of a fish net can be realized, and rapidness, accuracy and firmness are realized; a dual-layer circular tube nipple joint is sleeved on an anti-water-seepage and inner cavity anti-water-seepage alarm device of a dual-layer rubber tube, so that a mechanism in the abdomen of the fish is ensured; an air pump and an air bag are combined skillfully and applied flexibility, so that the head of robotic fish rises upwards during floating and extends downwards during sinking, a biomimetic function is realized, and the flexibility and diving speed can be increased; and video and the remote control are integrated, so that the function of fishing real fishes with a biomimetic fish is realized.

The invention discloses a method for evaluating shale gas adsorption through a coal / shale ultrahigh pressure gas absorption and seepage experiment. The method comprises the steps that a core is selected and put in a sample cylinder, a confining pressure pump is started to make the sample cylinder reach an experimental confining pressure, and vacuumizing is performed; the temperatures of the sample cylinder and a reference cylinder are stabilized at experimental temperature; helium gas is injected into the reference cylinder, and the pressure of the reference cylinder is measured; after the reference cylinder and the sample cylinder are balanced in pressure, the pressure of the sample cylinder is measured; the pressure of the reference cylinder is increased sequentially, and free space volume measurement of the sample cylinder is completed; systematic vacuumizing is performed; water steam is injected into the sample cylinder; methane having set pressure is injected into the reference cylinder, and the pressure of the reference cylinder is acquired; a balancing valve is turned on, and the pressure of the sample cylinder is acquired; the pressure of the reference cylinder is increased sequentially, and the shale gas adsorption experiment is completed under certain water saturation. By adopting the method, the porosity, the permeability, the adsorbing capacity and gas-water seepage of the experimental core, electrical resistivity change of the core in the experimental process and the influence of different water saturations on absorption and desorption amounts can be respectively measured.

The invention discloses a method for connecting slotted sections in underground construction of diaphragm wall of 'deep wall, large thickness and needing rock-socketed' applied to large acale bridges and construction foundation pit excavation. The method comprises the following steps: establishing a guide wall and a construction platform; constructing I phase slotted section of the diaphragm wall; constructing of a slotted eye of II phase slotted section of the diaphragm and jagged section surface of the I phase slotted section; forming an underground diaphragm wall; cleaning and brushing the wall of the II phase slotted section repeatedly up and down by a special steel brush carried by a hydraulic grab, until the steel brush does not have obvious spare, deposit on the bottom of the eye does not increase; releasing a reinforcing cage and casting concrete so as to complete the connection of I phase slotted section and II phase slotted section after the II phase slotted section is completed; forming a complete diaphragm wall after connection. After the method is adopted, the progress of the construction of the underground diaphragm wall is greatly improved; construction cost is saved; construction problems, such as concrete circumferential motion prevention, water seepage in seam and the like can be completely solved by the jagged connection section so as to improve construction quality and safety reliability.

An integrated shower base designed for improving the drainage of a tile shower is disclosed. The shower pan may be custom fabricated and molded with a depression surrounding a drainage opening for receiving a one piece floor drain. The pan and floor drain are welded together to prevent leaking. The floor drain contains weep holes so that water that seeps through the mortar on the shower floor and into the shower pan can drain properly without leaking. The floor drain also contains a reservoir for holding water that drains through the regular shower drain and also for water that seeps through the shower floor. A mortar guard is placed over the weep holes to prevent the holes from becoming clogged. A drainage mat is placed over the shower pan to help water seepage flow to the floor drain.

The invention discloses a binding material for filling fine-grain tailings. The binding material is prepared by milling and mixing the following components in percentage by mass: 15-40% of belite-sulphate aluminum cement, 2-10% of gypsum, 2-8% of quick lime, 40-70% of superfine-grain slag powder, 2-10% of coal ash, 1-6% of activating agent, 0.1-0.5% of activating accelerant, 0.1-0.5% of coagulant, and 0.1-0.5% of water reducer, wherein the activating agent is Na2SiO3, the activating accelerant is sodium fluosilicate, and the coagulant is any one or a mixture of two or more of LiOH, LiCO3 and LiCl; and the water reducer is a naphthalene water reducer or a polycarboxylic acid water reducer. According to the binding material for filling the fine-grain tailings, the problems that -0.074-mm fine-grain tailings and high-silt-content tailings are difficultly solidified and are low in strength after being solidified, and the strength of a filling body can meet a strength requirement on cut and fill of a mine on the filling body by using the binding material; the liquidity of slurry can be improved, and roof-contacting performance of the filling body can be improved; and the water retention capacity can be improved, and the water seepage of the slurry is reduced.

The invention relates to a cement-based penetrable crystallized waterproof paint, a preparation method and a construction method thereof. The cement-based penetrable crystallized waterproof paint is prepared from the following raw materials in percentage by weight: 65 to 70 percent of cement, 3 to 10 percent of modified bentonite, 2 to 5 percent of modified sodium silicate, 1 to 5 percent of diffusant, 0.5 to 1 percent of penetrant, 2 to 10 percent of wollastonite and 15 to 25 percent of quartz sand. The waterproof paint can recover minute cracks on concrete interfaces and inhibit the water seepage and damp of base interfaces effectively. In addition, the waterproof paint is high in capacity of freezing resistance, high-temperature resistance, chloridion resistance and acid and alkali resistance, and has a long waterproof effect. According to the cement-based penetrable crystallized waterproof paint, leveling layers on the concrete interfaces are saved, and protective layers are savedafter the concrete interfaces are coated, so the waterproof construction is simple. The cement-based penetrable crystallized waterproof paint is suitable for constructional engineering such as underground engineering, subway tunnels, civil air-defense construction, water ponds, oil sumps, sewage tanks, barns, bathrooms, roof squares, parking platforms, high-grade roadways and the like, and is used for processing defects of cracks, honeycomb pitted surfaces and the like of the concrete interfaces.

The invention discloses a concrete wall and bottom plate water seepage crack repair method. The method comprises the following steps that wall and bottom plate cracks are found out and marked; the crack of which the width is larger than 0.3 mm is subjected to digging into a V-shaped groove; dust, dirt and loose parts of the surface of concrete in the V-shaped groove area are removed and washed with water; layered dense blocking and maintenance are conducted on the V-shaped groove through a waterproof leaking stoppage part, and meanwhile, a grouting nozzle is implanted; grouting holes are obliquely drilled in the two sides of the crack, and a grouting nozzle is installed; and after final set of the waterproof leaking stoppage part, the grouting holes are circularly subjected to pressure grouting; and after grout is completed solidified, the grouting nozzles are disassembled. According to the method, by obliquely drilling the grouting holes in the two sides of the crack and installing the grouting nozzle, a plurality of channels communicating with the interior of the crack are formed, the water pressure of the interior of the crack can be reduced, grout can be injected into the crackconveniently in the later period, through permeation of the grout, the water seepage crack is sealed after the grout is solidified, and accordingly, the water seepage crack leaking stoppage effect isachieved so that underground construction water seepage accidents can be avoided.

The invention discloses a tunnel orthographic image acquisition system based on laser radar LIDAR point cloud data. The tunnel laser radar point cloud data of any shape design of section contour are unfolded into a measurable laser radar tunnel orthographic image map by using a skeleton line mileage projection method and a section contour projection method, and the image map acts as a reference base map and a target quantity color numerical analysis map is superposed on the image map in a semitransparent mode. The invention also provides a corresponding method. The generated laser radar tunnel orthographic image can truly reflect the measurable image of the size and the position of the internal wall of the tunnel and can generate a tunnel orthographic image map plane user report including "4D" information to visually display the three-dimensional section deformation and flatness of each part of the internal wall of the tunnel to tunnel structure detection users. The length, the width and the area of cracks, water seepage and other tunnel defects can be actually measured so that the geometric size of the defects can be calculated. The scientific basis is provided to assessment and restoration of the tunnel defects and the production efficiency of tunnel detection is greatly enhanced.

The invention relates to anti-corrosive coatings and particularly provides a supporting anti-corrosive coating modified by graphene, preparation and an application thereof. The supporting anti-corrosive coating is composed of an undercoat, an intermediate coating and a finishing coat, wherein the undercoat and the intermediate coating are modified graphene coatings and the finishing coat is polyurethane finishing coat or fluorocarbon finishing coat. The modified graphene coating is prepared by mixing a surfactant, as a modifier, with graphene to modify the graphene, dispersing the modified graphene in an organic solvent, and adding the dispersed mixture to organic resin, a curing agent and an additive. The supporting anti-corrosive coating is excellent in anti-water-seepage and salt-fog-resistant performance, is simple in process and is low in cost, and can be used as a heavy anti-corrosion coating for coating oil pipelines, oil storage tanks, chemical devices, ships and marine platforms and the like substrates for prolonging service life of the metal substrates.

The invention discloses a construction method for a full cover-excavation reverse method of underground engineering. The construction method comprises the following construction steps of A, underground diaphragm wall construction; B, top plate construction for an underground main structure; C, road face recovery construction or construction of a structure above ground; D, first layer underground excavating construction; E, repetition of the step D till underground excavating construction of the lowest layer is completed. The construction method is characterized in that drainage construction is conducted on underground water by adopting a collected water surface draining method in the process of the step B, and it is ensured that the water level is 50cm or so below a foundation pit. Construction of the structure above the ground in the step C can be conducted at the same time with the steps D-E. The steps D-E are constructed under the covering of the top plate completed in the step B. Underground engineering construction is conducted by adopting the construction method, not only can a construction period be shortened, but also the problems of differential settlement, water seepage and water leakage can be effectively solved.

The invention relates to an environment-friendly wood-plastic material which is prepared from the following raw materials in parts by weight: 30-40 parts of wood meal, 25-35 parts of straw powder, 25-35 parts of plant vine powder, 10-15 parts of paper powder, 10-15 parts of waste plastic particle, 19-25 parts of polypropylene, 19-25 parts of polyvinyl chloride, 12-18 parts of reinforcer, 8-13 parts of filler and 8-13 parts of adhesive. The wood-plastic material is simple to manufacture, fully utilizes the diversified raw materials, saves the wood, is economical and environment-friendly, and has the advantages of high compactness, no water seepage, chemical corrosion resistance, light weight and high strength. The raw materials can not be carbonized in the working process, thereby sufficiently ensuring the service performance of the material. The wood-plastic material has certain antistatic and flame-retardant properties, and can satisfy the demands for most occasions.

The invention discloses a method for sealing vertical cracks of basement concrete structures by using microbial grouting, which seals the cracks by using a method of grouting into cracks on the inner sides of walls. In particular, the method comprises the steps of punching holes, cleaning the holes, sealing the surfaces of the cracks, preparing bacterium fluid and nutritive salt solution, grouting the bacterium fluid, grouting the nutritive salt solution, and sealing and plugging grouting holes. The bacterium fluid can induce calcium chloride to generate calcium carbonate sedimentary to effectively fill, seal and plug the cracks and the grouting holes. Water injection tests and observation after raining show that the original cracks are obviously reduced in water seepage.

The invention relates to a building outer wall structure, in particular to an outer wall structure and a construction and installation method. The outer wall structure is sequentially provided with an inner decorative layer, a structural layer, a waterproof layer and an outer decorative layer from inside to outside. The construction and installation method of the outer wall structure includes the steps that wall battens and doors and windows are installed; the waterproof layer is constructed; construction and installation method of the outer wall structure are finished after the inner wall face and the outer wall face are decorated. The common quality problems such as empty drums, deformation, cracks and water seepage caused by thermal insulation construction on the outer wall are solved by using a self-heat-preservation system for the outer wall, so that an integral and reliable quality guarantee is provided for an outer wall engineering system; all the adopted materials are common combinations with light inorganic materials as carriers and are good in cosolvency, usability, cohesiveness, ageing resistance and the like; the construction procedure of outer wall engineering is simplified, construction period is shortened, unified management on construction sites is facilitated, management cost is lowered, and project management efficiency is improved; the self-heat-preservation function of the wall is achieved, and the problem that the outer wall is prone to water seepage or water leakage is solved.

The invention provides an integrated waterway plate and a filter unit provided with the integrated waterway plate. The side surface of the integrated waterway plate is provided with a plurality of joints and a plurality of filter core bases for connecting with a plurality of filter cores, a plurality of channels are formed in the integrated waterway plate, wherein the joints, channels and filter core bases form the whole or partial waterway pipeline of the integrated waterway plate, and the waterway pipeline is communicated when the filter core bases are connected with the filter cores. When the integrated waterway plate is applied in the filter unit, water to be filtered is allowed to flow into the waterway pipeline through one joint of the joints of the integrated waterway plate which is used as the joint of a water inlet, and flow out from one joint of the joints of waterway pipeline which is used as the joint of a water outlet after being filtered through the all or partial filter cores of the filter core bases in the waterway pipeline . According to the invention, the waterway pipeline connection for filtration can be simplified to avoid the water seepage and water leakage, and the space is saved.

The invention provides a fog sealing layer asphalt emulsion admixture and a use method thereof. The admixture consists of the following raw materials in percentage by mass: 30 to 60 percent of asphalt reclaiming agent, 5 to 10 percent of asphalt reclaiming aid, 1 to 3 percent of penetrant, 1 to 5 percent of emulsifier, 2 to 8 percent of tackifier, and the balance water. When the admixture is added into a fog sealing material, the infiltrability of the fog sealing layer asphalt emulsion can be reinforced, thus the emulsion can be quickly filled in pores and microcracks on road surfaces, so that the water seepage resistance of the pavement is reinforced, and the asphalt pavement is prevented from water damage; the admixture can be quickly infiltrated to an aged asphalt layer to harmonize the components in the aged asphalt, so that the aged asphalt is regenerated; the admixture has strong bonding capability with the asphalt pavement, after traffic is open, the fog sealing layer material and the pavement are bonded firmly, and the admixture is not easy to adhere to vehicle wheels; and the molded admixture has accordant color with the newly built pavement, thus the road appearance is beautified.

The invention relates to anti-freezing and anti-cracking concrete in the field of building materials. The anti-freezing and anti-cracking concrete comprises following components in percentage by weight, 10-20% of cement, 25-30% of sand, 30-45% of gravel, 10-15% of water, 2.0-5.0% of additives, 1.0-2.0% of water-proof agent and 0.0-1.4% of anti-freezing agent, and is produced by burdening and stirring. Compared with the prior art, the anti-freezing and anti-cracking concrete has the advantages of high strength, good toughness, cracking resistance, leakage resistance, high stability and the like, is capable of effectively solving the problems of cracking, brittleness and water seepage caused by the fact that the concrete is subjected to repeated freezing and thawing due to change of temperature difference, and increasing the indexes such as strength, toughness and stability, and is especially suitable for high and cold areas in north.

The invention discloses an overlapping integral type prefabricated assembly structure for a comprehensive pipe gallery and a construction method thereof. The overlapping integral type prefabricated assembly structure comprises envelop enclosures, a pipe gallery prefabricated assembly structure body, a bottom plate cushion course and a completely outer-cladding waterproof layer, wherein the envelop enclosures are located in a foundation pit; the pipe gallery prefabricated assembly structure body is arranged between the envelop enclosures; the bottom plate cushion course is arranged under the pipe gallery prefabricated assembly structure body; and the completely outer-cladding waterproof layer is arranged on the outer side surface of the pipe gallery prefabricated assembly structure body in a cladding mode. The upper portion of the pipe gallery prefabricated assembly structure body is filled with backfill earth, and the completely outer-cladding waterproof layer is arranged on the outer side surface of an outer side cast-in-situ part of the pipe gallery prefabricated assembly structure body in a cladding mode. The construction method of the overlapping integral type prefabricated assembly structure comprises the steps of prefabricated component machining, foundation pit excavation, bottom plate pouring, side wall construction, mid-partition construction, top plate construction, earth backfilling and the like. According to the overlapping integral type prefabricated assembly structure for the comprehensive pipe gallery and the construction method thereof, the prominent problems of force bearing of joints, water seepage of connection seams and the like in the underground engineering prefabrication process are solved; and the structural modes of bottom plate casting in situ, side wall single-layer overlapping, mid-partition double-layer overlapping, top plate overlapping, all-joint casting in situ and completely outer-side waterproof layer cladding are adopted, so that effective connection and the waterproof function of the joints are ensured.