31results about How to "Will not affect the construction progress" patented technology

The invention relates to a plastic retaining agent for newly mixed cement paste, mortar, concrete and the like, in particular to a multi-branched polycarboxylic water reducer with an excellent function of slump protection and a preparation method thereof. The water reducer is prepared with the following monomers through aqueous solution polymerization under the effect of a polymerization initiator: a monomer a of 30-60 percent of the total weight of reactants, a monomer b of 20-50 percent of the total weight of the reactants, a monomer c of 10-30 percent of the total weight of the reactants, and a monomer d of 5-15 percent of the total weight of the reactants. The multi-branched polycarboxylic water reducer still has an excellent performance of maintaining the plasticity of the concrete under the low dosage, and even in construction at the high temperature in summer, the slump loss of the fresh concrete is small, the scope of application in the cement is wide, and no obvious delayed coagulation occurs to the concrete. Therefore, the invention greatly improves the early and late strength of the concrete.

The invention relates to a magnet ring type settlement layered horizontal test system, which comprises an L-shaped settlement pipe consisting of a vertical part arranged in the vertical direction, a horizontal part arranged in the horizontal direction and a bend connecting the vertical part and the horizontal part, a plurality of settlement magnet rings arranged on the outer circumference of the vertical part of the settlement pipe at intervals and internally provided with permanent magnets, a tester, a test head and a cable connected between the test head and the tester and having the function of a calibrated scale, wherein a pipe mouth of the horizontal part in the settlement pipe is positioned in a protection pool under ground and outside a slope toe on one side of a roadbed. The settlement pipe of the magnet ring type settlement layered horizontal test system is arranged outside the roadbed, so the magnet ring type settlement layered horizontal test system is not influenced by the roadbed filling construction, and the problems of damage and deflection of the settlement pipe do not appear, the settlement does not lose, and the construction progress and quality are not influenced; in addition, the measurement is carried out outside the roadbed, and the height of the pipe mouth does not need to be measured; therefore, the reading position is fixed, and the measuring accuracy is high.

The invention relates to a water leakage point blockage method in a foundation pit water stop curtain. The method comprises the following steps: back-pressure sand bags are stacked in a water leakage point in a foundation pit near the water stop curtain, and are used for blocking the water leakage point; a first grouting pipe is drilled in soil near the water stop curtain, and first grouting slurry is filled to block a recess area in the soil corresponding to the water leakage point until the first grouting slurry cannot be filled; a second grouting pipe is drilled near the first grouting pipe, and second grouting slurry is filled in a gap formed by the first grouting slurry; and the back-pressure sand bags are removed, and steel plate piles are driven in the foundation pit near the water leakage point of the water stop curtain, are bonded on the surface of the water stop curtain, and are fixedly connected with the water stop curtain. The combination of construction measures preferably solves the blockage problem of the water leakage point, is short in construction time, and cannot influence the construction progress.

The invention relates to a shale sand fracturing pump stopping fracture diverting method. The method is applied to a stratum with too high distortion friction in the shale fracturing process. The fracture diverting method comprises the steps that sand-carrying fluid is pumped and injected to polish a stratum crack, and the pumping and injecting pressure is monitored; when the pumping and injectingpressure rises to the limiting pressure of a well head, smooth water is used for replacing the sand-carrying fluid to carry out pumping and injecting; a pump is stopped, the first displacement is reduced to zero, and the zero displacement is maintained for a preset period; the pump is started, ahead fluid is pumped and injected, and the pumping and injecting displacement is quickly increased to the first displacement; after pumping and injecting of the ahead fluid is finished, the sand-carrying fluid is pumped and injected again to carry out fracturing construction; under the action of the pressure difference generated by energy pulses generated by pump stopping and pump starting and the sedimentation of a propping agent, a new crack is opened, and the crack is diverted; and the process is repeated to complete fracturing construction, wherein the first displacement is designed construction displacement or the maximum construction displacement under the limiting condition of the well head. The shale sand fracturing pump stopping fracture diverting method has the advantages that temporary blocking materials do not need to be added, the problem that the torsion friction is too high is solved, and the construction quality is guaranteed.

The invention provides an automatic air supplying device for a manual hole digging pile well. The automatic air supplying device comprises air supplying equipment, air draft equipment, a ventilation pipeline, a well interior fixing plate, a ground fixing support, well interior fixing supports, a gas detector and a control background; the ventilation pipeline is divided into an air supplying pipeline and an air draft pipeline, and the gas detector is arranged on one side of an air outlet of the air supplying pipeline; the well interior fixing plate is vertically fixed to the well wall, and themultiple well interior fixing supports are arranged on the well interior fixing plate; the ventilation pipeline is in a 7 shape constituted by a horizontal section and a vertical section, the horizontal section is fixed to the ground through the ground fixing support, and the vertical section is fixed to the well interior fixing plate through the well interior fixing supports; and down-hole poisonous and harmful gas can be monitored in real time through the ventilation pipeline and the gas detector, when the poisonous gas exceeds the standard or the well interior air quality does not reach thestandard, gas exchanging can be quickly and circularly conducted in the well, and occurrence of safety accidents caused by the fact that the poisonous and harmful gas exceeds the standard is effectively reduced.

The invention belongs to the technical field of tunnel shield construction, and particularly relates to a construction method for vibration of tunnel vault concrete. The construction method comprisesthe specific steps of 1, carrying out measurement and lineation; 2, presetting a corrugated pipe; 3, mounting a lining template; 4, pouring concrete; 5, carrying out adhesive vibration; 6, carrying out plug-in vibration; and 7, filling the corrugated pipe. The construction method for the vibration of the tunnel vault concrete is capable of improving the vibration quality through an adhesive vibration and plug-in vibration matched manner.

The invention discloses a water-rich sand layer shield tunnel construction method. A constructed tunnel is a double-hole tunnel and is a subsurface tunnel with a hole body located in a water-rich sandlayer, the constructed tunnel comprises an underneath pass tunnel section passing through an existing viaduct and three non-underneath pass tunnel sections, shield construction is performed after theunderneath pass tunnel section is isolated and reinforced, and precipitation is not needed. The shield construction is conducted after precipitation of the non-underneath pass tunnel sections. The method is reasonable in design, easy and convenient to construct and good in using effect, a shield tunnel is divided into the underneath pass tunnel section and the non-underneath pass tunnel sectionsaccording to whether the viaduct is underneath pass or not, and construction is directly conducted after the non-underneath pass tunnel sections are subjected to precipitation. The underneath pass tunnel section is isolated and reinforced to form a slurry consolidated body, so that a shield tunneling machine performs tunneling construction in the slurry consolidated body, and soil disturbance andformation pressure caused by tunneling of the shield tunneling machine during construction are resisted through the slurry consolidated body. Separation walls are arranged on the two sides of the slurry consolidated body respectively, the formation pressure can be completely blocked, and safety and zero settlement of the viaduct on the upper side of the underneath pass tunnel section are guaranteed.

The invention discloses a construction method of a high pier column straining beam. The construction method comprises the steps that a first hole opposite to a longitudinal bar of the straining beam in position is formed in a high pier column; a groove-shaped straining beam supporting structure is manufactured, a second hole opposite to a straining beam longitudinal bar in position is preset in the straining beam supporting structure, and a positioning structure opposite to a straining beam stirrup in position is preset on the inner side wall; the straining beam supporting structure is hoisted to the preset height between the high pier columns, an opening of the straining beam supporting structure is made to face upwards, prestressed tendons are arranged in the first holes and the second holes which are opposite in position in a penetrating mode, the prestressed tendons are tensioned, and after the prestressed tendons are fixed, cement paste is injected into the holes where the prestressed tendons are located; after the cement paste reaches the preset strength, steel bars penetrate into the remaining first holes, stirrups of the straining beam are bound, and the stirrups are bound to the steel bars and the positioning structures; and concrete is poured into the straining beam supporting structure. According to the construction method of the high pier column straining beam, the construction quality is guaranteed, meanwhile, the construction cost can be reduced, and the construction speed is increased.

The invention discloses a circular water-collecting well foundation pit bottom interception tool and a construction method thereof. The tool comprises a steel sleeve, a first L-shaped waterstop steelplate ring and a second L-shaped waterstop steel plate ring are welded to the outer side of the steel sleeve, and a round steel plate is welded to a lower opening. When a foundation pit is dug to thebottom, the steel sleeve is inserted into a circular water-collecting well, concrete is used for cushion construction, a waterproof layer is stuck to the pipe wall of the first L-shaped waterstop steel plate ring, and an additional waterproof layer and a waterstop belt are made. When a base plate waterproof layer is constructed, the waterproof layer is turned upwards to the bottom of the first L-shaped waterstop steel plate ring, waterproof close-up treatment is conducted with sealing cement gum, and then concrete is used for pouring. A round steel plate cap and an upper opening of the steel sleeve are welded to be sealed, a js waterproof coating is used for brushing, and finally concrete is used for pouring at the upper opening of the steel sleeve. Accordingly, the construction method issimple, professional training is not needed, the construction speed is high, the applied materials are commonly used materials on construction sites, the construction cost is low, and the waterproof effect is good. The tool has the high economic and social benefits.

The invention discloses a centralized water supply and gas supply system for mud suction sinking construction of a large open caisson, and belongs to the technical field of open caisson construction.The centralized water supply and gas supply system comprises at least two water supply and gas supply pipe sets and water and gas supply assemblies, wherein the water supply and gas supply pipe sets are located in different areas divided by an open caisson platform, the water and gas supply assemblies communicate with the water and gas supply pipe sets respectively, when different areas of the open caisson platform are independent of one another, water and gas are supplied independently through the water and gas supply assemblies, and when different areas of the open caisson platform communicate with one another, water and gas are supplied in a centralized mode through the same water and gas supply assembly, so that the stability of the water and gas supply system is guaranteed, and smoothsinking construction of the open caisson is guaranteed.

The invention relates to a landfill gas horizontal transverse well gas collection and leachate reverse drainage system. The system comprises horizontal transverse wells which are positioned below a garbage heap body and arranged in the height direction of the heap body at intervals, wherein the horizontal transverse wells are horizontally arranged at intervals; well heads are arranged on a side slope of a landfill site operation area; the well heads of the horizontal transverse wells are connected with a landfill gas collection pipeline and a leachate reverse drainage ditch correspondingly; the horizontal transverse wells are sleeved with protective sleeves; and small holes are formed in the outer walls of the horizontal transverse wells and the outer walls of the protective sleeves in advance. A construction method comprises the steps of excavation of the gas collection pipeline, installation and burying of the protective sleeves and the horizontal transverse wells, construction is rapid and convenient, and a use method of the system comprises the step that landfill gas or leachate can be collected by adjusting a control valve. According to the landfill gas horizontal transverse well gas collection and leachate reverse drainage system and method, the problems that in an existing gas exhaust and leachate collection method, a vertical well is prone to deformation along with rising of the height of the heap body, and the well heads are positioned above the heap body, so that landfill operation is affected can be effectively solved.

The invention discloses a detachable external heat preservation electric wire bridge frame, which comprises a C-type external insulation layer, a plurality of bridge frame plates are arranged on the web of the external insulation layer, and different kinds of electric wires are arranged between the bridge frame plates. The connecting plate on the outer insulation layer is a corner plate with a folded angle of 45 degrees, the oblique edge of which is fixedly connected with the outer insulation layer, and the vertical edge of which is provided with a fixed hole and is parallel to the wall; a lowconnection plate is a corner plate with a fold angle of 90 DEG. The use method of the detachable external heat preservation electric wire bridge comprises the following steps of: firstly, manufacturing a detachable external insulation electric wire bridge, and spraying a suitable color on the surface of the detachable external insulation electric wire bridge; pasting the heat preservation board on the wall, and reserving the strong and weak electric wires; nailing cement nails on the upper side within the range of the strong and weak electric wires; placing strong and weak wires according todifferent property right units; hanging the bridge frame on the cement nail; inserting a strip-shaped heat preservation plate into a gap between the bridge frame and the upper heat preservation plate;covering the wall surface with mesh cloth. The invention avoids the occurrence of cold bridge, and the building energy-saving effect is very ideal.

The invention belongs to the field of tunnel excavation equipment, and particularly relates to a heading machine cutterhead and a heading machine. The heading machine comprises the cutterhead, the cutterhead comprises a cutterhead body, the cutterhead body is provided with a plurality of main beams, cutters are installed on the main beams, the main beams are arranged in the radial direction of the cutterhead body, and the main beams are distributed in a radial shape with the center of the cutterhead body as the center; a residue discharging opening allowing excavated residue soil to enter the rear side soil bin is formed in the space between every two adjacent main beams, a soil crushing device is arranged at each residue discharging opening and comprises a driving device and a soil stirring structure driven by the driving device to rotate so as to stir the residue soil, the driving devices are fixed to the cutterhead body, the soil stirring structures are located in the residue discharging openings, and the driving devices are fixed to the cutterhead body. The driving device drives the soil stirring structure to rotate so as to stir and crush the muck passing through the deslagging port, so that the muck is prevented from forming a mud cake at the deslagging port, and the tunneling machine achieves the purposes of crushing the muck and preventing the mud cake from forming at the deslagging port, and does not affect the construction progress.

The invention provides a sloping roof precast beam lifting device used for an assembly type concrete structure and an installation method and belongs to the technical field of building construction. The safety problem in the sloping roof precast beam lifting process in an existing assembly type construction manner is solved. Due to the measure that angle iron supporting plates are fixed on the topside faces of precast pillars through embedded sleeves and high-strength bolts to serve as precast beam temporary placement points, the safety problem in the sloping roof precast beam lifting processof an existing precast assembly type concrete structure is solved, and the construction safety is improved. In addition, supporting assemblies can be additionally arranged at the positions of main ribs on the outer sides of the precast pillars according to practical engineering conditions to eject the centers of the precast beams, and the precast beams are prevented from falling. According to theinstallation method, under the condition that an original structure system is not damaged, the falling risk generated during sloping roof precast beam lifting can be resisted, favorable conditions are provided for lifting construction of the sloping roof precast beams on steel pipe template shelves, and the purpose of safe production during construction is achieved.

The invention provides a method for measuring layered settlement of a soil body under a dynamic compaction effect. The method comprises the following steps of manufacturing circular iron sheets as markers, and welding a hook on the upper surface of each circular iron sheet; determining embedding positions, drilling a hole at each embedding position, putting a certain amount of dry sand into the drilled holes, compacting, tying the hooks on the circular iron sheet with a rope, putting the circular iron sheet into the drilled hole, and backfilling the drilled hole; and on the ground surface above the embedding positions of the markers, acquiring field data by adopting a ground penetrating radar to obtain an observation image, reading an initial embedding depth value of the circular iron sheet of each marker and a post-settlement depth value after dynamic compaction construction according to the observation image of the ground penetrating radar, and comparing the initial embedding depth value with the post-settlement depth value to obtain a dynamic compaction layered settlement value of a soil layer where each marker is positioned. The method has the beneficial effects that the settlement of soil layers with different depths after dynamic compaction construction is detected by utilizing high precision of the ground penetrating radar, the dynamic compaction construction site operation is facilitated, the observation data is reliable, and the dynamic compaction reinforced soil body is not damaged in the measuring process.

The invention, which belongs to the technical field of a bridge segment prefabricated plant, relates to a buffer zone in a bridge segment prefabricated plant. With an isolation zone with the double-layer partition and a sensing zone for sensing entrance and exit of vehicles, the vehicle passing efficiency is ensured and the external cold air is prevented from entering the prefabricated plant, so that the concrete pouring and maintaining effects in the prefabricated plant can be improved. The prefabrication of the bridge segments in the prefabrication plant does not change with seasons and thusthe construction progress is not affected; and the normal prefabrication of the bridge segments can be guaranteed even in winter.

The invention provides a supporting structure for a tunnel without arch support passing through a broken section of an arch crown and a construction method of the supporting structure. The method comprises the following steps that a danger elimination step is carried out, specifically, danger elimination is carried out by adopting a mode of combining machinery with manual work, and a first grout stopping layer is initially sprayed on bare surrounding rock; the construction step of temporary arch frame in the broken zone is carried out, specifically, a plurality of arch supports are arranged in the extending direction of the tunnel at intervals, reinforcing meshes are laid on the back faces of the arch supports, and second grout stopping layers are sprayed and hung on the arch supports and the reinforcing meshes; the reinforcement step is carried out, specifically, a plurality of hollow grouting anchor rods are arranged at intervals in the radial direction of the tunnel, and a plurality of advanced small guide pipes are arranged at intervals within the 120-degree range of the excavation contour line of the tunnel; grouting is carried out on the hollow grouting anchor rods and the advanced small guide pipes; a tunnel excavation step is carried out, specifically, after grouting is carried out for 8 hours, the grade of the surrounding rock is reduced, and tunneling construction is carried out; and a second lining construction step is carried out, specifically, when a second lining is constructed before the temporary arch frame, the arch supports are dismantled, and second lining construction of the broken zone is carried out. The method can be applied to the construction of the tunnel without the arch support penetrating through the broken section of the arch crown, and the safety coefficient of the construction process is high.

The invention discloses a fast mounting and demounting type building construction platform. The fast mounting and demounting type building construction platform comprises a bottom plate and is characterized in that a plurality of universal wheels are arranged at the lower end of the bottom plate, positioning sleeves are fixed at four corners of the upper end of the bottom plate, a seat tube is fixed at the upper end of each positioning sleeve, a support standing column penetrating the corresponding seat tube is arranged in each positioning sleeve, a movable support plate is hinged to the leftend of the bottom plate, a ladder stand is arranged on the movable support plate, a construction platform body is arranged above the bottom plate and comprises a support plate and positioning conicalcylinders, a ladder stand limit plate is fixed to the left end of the support plate, a protective rack is arranged on the support plate, and a first diagonal bar and a second diagonal bar are arrangedbetween the support plate and the bottom plate. The fast mounting and demounting type building construction platform is simple in structure and high in practicality.

The invention relates to a construction method for ground reinforcement before a shield cutter head is opened, comprising the following steps: constructing a cross passage at the designed tool change position of a shield machine, and the formed cross passage is located at the shield machine to be excavated and formed above the tunnel; and a grouting hole is constructed at the bottom of the transverse channel corresponding to the position where the shield machine is to pass, and grouting is carried out into the grouting hole to form a reinforcement pile, thereby utilizing the formed reinforcement The piles reinforce the soil at the location where the TBM is to pass. The present invention uses the transverse channel as the construction work surface for strengthening the soil, and the bottom of the transverse channel corresponds to the soil in front of the cutter head of the shield machine, so as to ensure the construction safety of the cutter head. It solves the problem that the existing buildings on the existing ground affect the vertical reinforcement of the ground.

The invention discloses a foundation pit drilling pile steel supporting structure which comprises a foundation pit cavity. Supporting pillars are arranged on the two sides of an inner cavity of the foundation pit cavity. Insertion rods are fixedly connected to the bottoms of the supporting pillars. The bottoms of the insertion rods penetrate the two sides of the bottom of the foundation pit cavity. A first supporting pipe is arranged on the top of the left side of the inner cavity of the foundation pit cavity, and a second supporting pipe is arranged on the top of the right side of the inner cavity of the foundation pit cavity. Fixing parts are arranged on the left side of the first supporting pipe and the right side of the second supporting pipe, and positioning parts are arranged on thetop and the bottom of the right side of the first supporting pipe. By means of the foundation pit drilling pile steel supporting structure, due to the fact that the foundation pit cavity, the supporting pillars, the insertion rods, the first supporting pipe, the second supporting pipe, the fixing parts, the positioning parts, positioning plates, positioning pillars, positioning holes and screw pins are arranged and are matched, a good supporting effect is achieved, foundation pit collapse cannot be caused, meanwhile, the structure is simple, demounting and adjusting are facilitated, and the construction steps and the construction cost are reduced.

The invention relates to a water leakage point blockage method in a foundation pit water stop curtain. The method comprises the following steps: back-pressure sand bags are stacked in a water leakage point in a foundation pit near the water stop curtain, and are used for blocking the water leakage point; a first grouting pipe is drilled in soil near the water stop curtain, and first grouting slurry is filled to block a recess area in the soil corresponding to the water leakage point until the first grouting slurry cannot be filled; a second grouting pipe is drilled near the first grouting pipe, and second grouting slurry is filled in a gap formed by the first grouting slurry; and the back-pressure sand bags are removed, and steel plate piles are driven in the foundation pit near the water leakage point of the water stop curtain, are bonded on the surface of the water stop curtain, and are fixedly connected with the water stop curtain. The combination of construction measures preferably solves the blockage problem of the water leakage point, is short in construction time, and cannot influence the construction progress.

The invention relates to a port exhaust assembly used for ballastless track construction and a track construction method. The port exhaust assembly comprises a plastic foam board and a plurality of end exhaust pipes, wherein the plastic foam board is arranged on the end face of a track board in a fit manner, and a plurality of openings are concavely formed on the edge of the lower end of the plastic foam board upwards at intervals; an inclined opening is formed at one end of each end exhaust pipe; one end exhaust pipe is inserted in each opening in the plastic foam board in an inclined manner; the inclined openings of the end exhaust pipes are positioned at the lower end; and the inclined openings face upward. The port exhaust assembly used for ballastless track construction disclosed by the invention is arranged on the end face of the track board and is capable of exhausting air below the central part of both ends of the track board in time during the process of pouring cement and emulsifying asphalt and mortar so that the degree of density at the part is the same as that of other parts; and therefore, the quality and running safety of the whole engineering can be improved. Moreover, the construction method has the steps mostly the same as the steps of the conventional construction method; and therefore, the construction progress cannot be influenced, and the constriction cost cannot be increased.

The invention discloses a continuous monitoring device and method for deformation of a permanent steel formwork in a construction period. The device comprises a sensing optical fiber, a protection clamp, a communication optical fiber, a photometer, a data processing terminal, an optical fiber fusion splicer and a laser optical fiber test pen. The sensing optical fiber is completely fixed with the monitoring surface of the permanent steel template, and the sensing optical fiber is connected with the spectrometer through the communication optical fiber; the protection clamp is located at a sensing optical fiber outgoing position and used for protecting a fiber core led out of the sensing optical fiber; the communication optical fiber is used as a channel for releasing detection light and receiving scattered light by the light receiving instrument; and the spectrometer is also connected with the data processing terminal. The method comprises the steps of indoor experiment, field arrangement, continuous monitoring, data processing and the like. The method is not interfered by environmental factors, deformation and temperature change of the steel formwork can be monitored in real time in the runner concrete pouring period, forecasting and early warning are achieved, follow-up construction and maintenance are effectively guided, economic losses are reduced, and the method has great application value.

The invention relates to a plastic retaining agent for newly mixed cement paste, mortar, concrete and the like, in particular to a multi-branched polycarboxylic water reducer with an excellent function of slump protection and a preparation method thereof. The water reducer is prepared with the following monomers through aqueous solution polymerization under the effect of a polymerization initiator: a monomer a of 30-60 percent of the total weight of reactants, a monomer b of 20-50 percent of the total weight of the reactants, a monomer c of 10-30 percent of the total weight of the reactants, and a monomer d of 5-15 percent of the total weight of the reactants. The multi-branched polycarboxylic water reducer still has an excellent performance of maintaining the plasticity of the concrete under the low dosage, and even in construction at the high temperature in summer, the slump loss of the fresh concrete is small, the scope of application in the cement is wide, and no obvious delayed coagulation occurs to the concrete. Therefore, the invention greatly improves the early and late strength of the concrete.

A substation switch room reserved and pre-embedded rear construction method mainly includes the following steps: base construction preparation, leveling, ground level maintenance, and embedding parts placement. The present invention is a construction technique in which the traditional construction of substation switch rooms and cable interlayers is reserved and pre-embedded synchronously with the construction of the main body, and is changed into a construction method of opening and slotting after pre-reserving and pre-embedding. The pre-embedded iron parts constructed by the post-positioning method have relatively simple process, precise construction positioning, well-controlled elevation, and no objects protruding from the slab surface, which makes the operation easy and simple during the construction process, and the elevation of the slab surface is also easy to control. Save time and save labor costs. For the installation of reserved holes, it is no longer necessary to leave a template in advance for opening the holes, which is labor-intensive and time-consuming, and the problems of deviation and easy deformation of the plane size are not easy to occur during positioning. The overall process is beautiful, which not only saves time but also reduces costs. At the same time, the workload of hole sealing in the later stage is reduced, and the number of hole cover plates is reduced.

The invention relates to a landfill gas horizontal horizontal well gas gathering and reverse leachate system, comprising horizontal horizontal wells located below a garbage dump body and arranged at intervals along the height direction of the stack body, the horizontal horizontal wells are arranged horizontally at intervals, and the well heads are arranged at the filling level. On the slope of the landfill operation area, the wellhead of the horizontal horizontal well is respectively connected with the landfill gas collection pipeline and the leachate infiltration ditch. The outer casing of the horizontal horizontal well is provided with a protective casing, and the outer wall of the horizontal horizontal well and the protective casing are all preset with small holes; and the construction The method includes the excavation of the gas gathering pipeline, the installation and burying of the protective casing and the horizontal horizontal well, and the construction is fast and convenient. The system and method for gas collection and reverse drainage of leachate in horizontal horizontal wells of landfill gas provided in the above technical solutions can effectively solve the problem that the existing vertical wells in the existing exhaust gas and leachate collection methods are easily deformed as the height of the stack increases, and the wellhead is located at the top of the pile. Problems that affect landfill operations above the heap.

The invention provides an automatic air supplying device for a manual hole digging pile well. The automatic air supplying device comprises air supplying equipment, air draft equipment, a ventilation pipeline, a well interior fixing plate, a ground fixing support, well interior fixing supports, a gas detector and a control background; the ventilation pipeline is divided into an air supplying pipeline and an air draft pipeline, and the gas detector is arranged on one side of an air outlet of the air supplying pipeline; the well interior fixing plate is vertically fixed to the well wall, and themultiple well interior fixing supports are arranged on the well interior fixing plate; the ventilation pipeline is in a 7 shape constituted by a horizontal section and a vertical section, the horizontal section is fixed to the ground through the ground fixing support, and the vertical section is fixed to the well interior fixing plate through the well interior fixing supports; and down-hole poisonous and harmful gas can be monitored in real time through the ventilation pipeline and the gas detector, when the poisonous gas exceeds the standard or the well interior air quality does not reach thestandard, gas exchanging can be quickly and circularly conducted in the well, and occurrence of safety accidents caused by the fact that the poisonous and harmful gas exceeds the standard is effectively reduced.

A reserve embedded postposition construction method of a switch gear room of a transformer substation mainly comprises the following steps of construction preparation of a base layer, levelling, floor maintenance and placement of embedded pieces. By the reserve embedded postposition construction method of the switch gear room of the transformer substation, a construction technology, which is synchronous to main construction, of traditional reserve embedded construction of the switch gear room of the transformer substation and a cable interlayer is modified into reserve embedded postposition hole and groove forming. The technology of embedded iron pieces constructed by a postposition method is simple, construction positioning is accurate, elevation is controlled in place, any objects projected out of a plate surface do not exist, operation is easy in a construction process, elevation of the plate surface is also easy to control, and time and labor cost are saved. During mounting of reserved holes, form boards for forming the holes are not required, labor and time are saved, errors are not easy to cause during positioning, and a plane view size cannot deform easily. The whole technology is attractive, the time is saved, the cost is reduced, later hole blocking workload is reduced, and the number of hole cover plates is reduced.