143results about How to "Simple construction process" patented technology

The invention discloses a self-adaptive control method for underground coal mine hole sealing and grouting, and belongs to the technical field of well hole packing. The method comprises the steps that plugging bags are sequentially installed at the cross sections of two drill holes of an underground coal mine working face, compressed air is injected into the plugging bags, and a cylindrical space between the bags is filled with multi-stage coal powder distribution materials in a layered mode and compacted; mixing ordinary Portland cement, a composite expanding agent, a carboxyl water reducer, a hydroxypropyl methyl cellulose stabilizer and water according to a preset ratio, and screening; stepwise pressure injection is implemented, and the grouting pressure and rate are regulated and controlled in a variable-rate climbing mode, a constant-pressure variable-speed mode and a proportional attenuation mode; and constant-temperature and constant-humidity maintenance is conducted on the grouting completion area, so that the desorption value of the drilling cuttings is reduced to a target value. According to the scheme, the grouting process parameters can be optimized, and the grouting quality is improved.

The invention discloses a double-liquid water-soluble polyurethane ground grouting flowing water blocking method. The method comprises the steps that A, ground penetrating roadway drilling construction is conducted; b, a double-pipe grouting device is installed; c, pressing water before grouting; step D, preparing a double-liquid water-soluble polyurethane grouting liquid; e, the double-fluid water-soluble polyurethane grouting fluid is mixed through a double-pipe grouting device and then grouted to a target position; and F, water pressing is conducted after grouting. The method is a more efficient, environment-friendly and economical water gushing treatment scheme, the treatment effect of flowing water plugging in the complex underground environment can be effectively enhanced, and therefore construction and operation safety of the deep-buried tunnel is guaranteed.

The invention discloses a connecting joint for vertical steel bars of a prefabricated panel by adopting UHPFRC (Ultra High Performance Fiber Reinforced Concrete) lap joint, and belongs to the technical field of building structures. The connecting joint comprises a first prefabricated wall panel and a second prefabricated wall panel, wherein the first prefabricated wall panel comprises a connecting hole and a first connecting steel bar; the second prefabricated wallboard comprises second connecting steel bars, the first connecting steel bars and the second connecting steel bars are arranged in the connecting holes at intervals, and UHPFRC is poured into the connecting holes. The connecting holes are formed in the horizontal joints of the bottoms or the tops of the prefabricated wall panels, the connecting steel bars are arranged in the connecting holes, the connecting steel bars extending out of the prefabricated wall bodies adjacent to the horizontal joints are in single-row or double-row lap joint in the connecting holes by pouring the UHPFRC, and therefore formworks and sleeves / casing pipes are omitted, and the construction cost is reduced. The construction technology of vertical steel bar connection in the fabricated shear wall is obviously simplified, and the connection cost is reduced.

The invention relates to the technical field of HDPE pipeline shipping, in particular to an HDPE pipeline mooring and positioning system and method.The HDPE pipeline mooring and positioning system comprises a barge, a crane ship, a tugboat, a plurality of auxiliary ships and a plurality of positioning anchors, the tugboat is used for dragging an HDPE pipeline, the barge and the crane ship are used for positioning the HDPE pipeline from the two ends of the HDPE pipeline, and the auxiliary ships are used for positioning the HDPE pipeline from the two ends of the HDPE pipeline. The positioning anchors are symmetrically arranged on the two sides of the HDPE pipeline and used for positioning the HDPE pipeline, and the auxiliary ship is used for moving the HDPE pipeline. Compared with a traditional steel pipe pile construction technology, the mooring positioning system provides stable positioning points through the positioning anchors symmetrically arranged on the two sides of the HDPE pipeline, construction steps are simplified through cooperative operation of a tugboat, a barge, a crane ship and an auxiliary ship, particularly, complex steel pipe pile mounting and dismounting do not need to be conducted, the construction time is greatly shortened, and the construction efficiency is improved. And the construction efficiency is obviously improved.

The invention provides a pipeline grouting compactness detection device and method based on an optical fiber sensor, and relates to the field of bridge concrete prefabricated component detection. The inflatable capsule is tightly attached to the inner wall of the pipeline, good contact and a stable measurement environment are ensured, the temperature sensing optical fibers are evenly arranged on the outer surface of the inflatable capsule and penetrate into the prestressed pipeline together with the inflatable capsule, and the temperature sensing optical fibers are firmly attached to the inner wall of the pipeline, so that the temperature change in the pipeline can be accurately sensed; performing data acquisition and analysis by using an optical fiber temperature monitoring system, acquiring a temperature signal fed back by the temperature sensing optical fiber in real time, and performing analysis; the temperature rise curve of each measuring point is concerned, the temperature change in the grouting process is reflected in real time, the compactness and uniformity of grouting are indirectly evaluated, the temperature change is monitored in real time, a scientific basis is provided for evaluating the grouting effect, and the quality and safety of the prestressed pipeline are ensured.

The invention discloses a submarine cable protection device and an installation method thereof. The submarine cable protection device comprises a plurality of pile casing assemblies which are connected in a nested mode. Each pile casing assembly comprises a sleeve, nested connection structures connected to the two ends of the sleeve and an annular flow guide structure arranged on the outer surface of the sleeve, and all the sleeves and the nested connection structures are of hollow structures and used for submarine cables to penetrate through in the axial direction. Each nested connection structure comprises a mother end and a son end, and the mother ends and the son ends connected with the same sleeve are respectively used for being in nested connection with the corresponding son ends and mother ends connected with different sleeves; each mother end is composed of two symmetrical semispherical mother end units, and each son end is composed of two symmetrical semispherical son end units; each annular flow guide structure comprises an annular base and a plurality of flow guide plates with spaced protrusions, the outer surfaces of the corresponding sleeves are sleeved with the annular bases, the flow guide plates are fixed to the corresponding areas of the annular bases, and the annular bases are of an openable structure. The invention aims to realize anti-bending protection of the submarine cable.

The invention discloses a structure for consolidating and reinforcing a soft foundation through solar heat and an operation mode of the structure. The structure comprises a soft foundation drainage consolidation system, a solar heating system, a vacuum pressure system, a water filling pipe bag load increasing structure, a stacking structure and a foundation soil layer. The lower part of the soft foundation drainage consolidation system is inserted into the foundation soil layer, and the upper part of the soft foundation drainage consolidation system is arranged on the top surface of the foundation soil layer; the solar heating system and the vacuum pressure system are respectively connected with the soft foundation drainage consolidation system; the stacking structure and the water filling pipe bag load increasing structure are sequentially arranged on the upper portion of the soft foundation drainage consolidation system from bottom to top, the vacuum pressure system is arranged on the top face of the stacking structure, and the solar heating system is arranged on the top face of the foundation soil layer. The deep soft foundation is reinforced through combination of the drainage wall, a common drainage plate and solar thermal consolidation, the reinforcing effect is good, and the method is economical.

The invention relates to the technical field of coating equipment, in particular to a camouflage coating spraying device and intelligent construction equipment. The camouflage paint spraying device comprises a spraying gun which is installed on the base frame, communicated with paint raw material liquid and used for spraying the paint liquid and forming a spraying range. And the movable frame is mounted on the base frame in a sliding manner and forms a shielding surface capable of adjusting the angle of the shielding line. The movable driving part is mounted on the base frame, the output end is connected with the movable frame, and the movable driving part is used for driving the movable frame to quantitatively slide. According to the spraying mode, overlapping spraying is not needed, a coating with a special thickness is not needed to cover the color of the lower layer to prevent bleeding, meanwhile, construction is convenient, the construction period cannot be prolonged, use of paint can be greatly reduced, and therefore the cost is reduced. Manual operation is not needed, and construction damage is avoided. Three-dimensional simulation construction, overall construction, observation and modification can be carried out in advance, and overall adjustment of the camouflage pattern is facilitated.

The invention discloses an under-pressure well process pipe column with a blowout prevention function and a construction method of the under-pressure well process pipe column. The under-pressure well process pipe column sequentially comprises a screwed plug, a screen pipe, a multifunctional under-pressure ball seat, a blowout prevention tail pipe valve, a first water distributor, a first packer, a second water distributor, a second packer and a third water distributor from bottom to top; normal water injection of the first to third water distributors is ensured; during plugging, the multifunctional under-pressure ball seat is automatically opened, so that no dead cavity is generated at the lower end of the tubular column. During normal well washing, the ball seat is closed, and water is injected into the water distributors normally. During inverse well flushing, the center channel of the ball seat is opened, and it can be guaranteed that setting can be conducted again during normal water injection. When the underground pipe column needs to be lifted, the strong magnetic ball suction pipe is put, and the lower end of the pipe column does not form a dead cavity, so that the strong magnetic ball suction pipe can smoothly move downwards; the bottom reversely seals the lower end opening of the inner sliding sleeve of the blowout prevention tail pipe valve, reliable blocking is achieved, and then underground pipe columns can be pulled out of a well mouth one by one under pressure for maintenance.

The invention discloses a construction method of a vibration reduction and isolation system for relieving the influence of industrial vibration on surrounding buildings. The construction method comprises the following steps that firstly, an industrial vibration source and the surrounding buildings are determined; 2, designing a vibration isolation trench; 3, excavating a vibration isolation trench; 4, loose soil bodies are removed, and soil residues are cleaned; 5, heating the modified asphalt, and heating and stirring the modified asphalt and the added hemp knife; sixthly, the improved asphalt hemp mixture is poured into the vibration isolation trench to be filled layer by layer; 7, naturally cooling and curing the mixture; and 8, sealing the vibration isolation trench by adopting a rubber cover plate. The vibration isolation ditch for pouring the improved asphalt hemp mixture is arranged between the industrial vibration source and the building, the propagation path of vibration waves generated by the industrial vibration source is changed, the energy of the vibration waves is consumed, the vibration reduction and isolation energy consumption efficiency of the vibration reduction and isolation system is greatly improved, vibration disasters of industrial vibration to surrounding houses are effectively relieved, and the service life of the vibration reduction and isolation system is prolonged. And meanwhile, industrial production is not affected, and the method has creative engineering significance and has the practical value of simple construction process and low cost.

The utility model discloses a composite floor near-edge cantilever end reinforcing node which is arranged on a frame edge beam and comprises an edge mold, the edge mold comprises a horizontal section, a vertical section and a bending section which are formed by bending in sequence, the horizontal section and the bending section are arranged at the two ends of the vertical section respectively, the horizontal section is perpendicular to the vertical section, and the bending section is perpendicular to the vertical section. The bent section is bent towards the direction of the horizontal section; the horizontal section is fixedly lapped on the top surface of the frame edge beam; the stiffener is fixedly arranged on the horizontal section in the direction perpendicular to the axis of the frame edge beam, and one end of the stiffener extends out of the horizontal section and is fixedly connected with the top surface of the frame edge beam; and the pull rod is obliquely arranged, one end of the pull rod is fixedly connected with the bent section, and the other end of the pull rod is fixedly connected with the stiffener. The floor support plate is simple in construction process, and the construction period can be effectively shortened while the strength of the floor support plate is enhanced.

The invention provides a titanium gypsum curing agent, a preparation method and application, and belongs to the technical field of road engineering materials. The raw materials comprise, by weight, 30-50 parts of an exciting agent, 10-15 parts of a filling material, 30-50 parts of an active solid waste material, 1-10 parts of calcium oxide, and 2-5 parts of a dispersant; the exciting agent comprises an agent A and an agent B in a mass ratio of 0.025-0.08; the agent A comprises sodium hydroxide and potassium hydroxide; and the agent B comprises composite Portland cement and ordinary Portland cement. The synergistic hydration hardening effect among the solid waste raw materials is fully utilized, the solid waste raw materials and the titanium gypsum can generate the synergistic activation effect through the double salt effect and the tetra-coordination isomorphism effect of silicon, a compound or solid solution with certain strength and stability is formed, harmful substances in the titanium gypsum are physically wrapped, and the titanium gypsum is prepared. The effective curing of harmful substances of the titanium gypsum is realized, and certain road strength is generated.

The invention provides a construction method of a multi-element solid waste-based cementing material roadbed filler, and relates to the technical field of road engineering, and the construction method comprises the following steps: S1, selecting raw materials: fly ash, slag powder, carbide slag powder, desulfurized gypsum powder, gasified slag powder, coal gangue powder, steel slag powder, tailing powder, coal cinder powder, building solid waste powder and municipal waste powder; s2, raw material pretreatment; s3, preparing a composite exciting agent: preparing sodium sulfate, calcium hydroxide, calcium chloride, calcium sulfate, sodium silicate and sodium hydroxide; s4, preparing a composite exciting agent solution; s5, preparing a multi-element solid waste-based cementing material: uniformly mixing the raw materials pretreated in the step S2 with the composite activator prepared in the step S4 according to a ratio; s6, roadbed laying, wherein a sodium bentonite waterproof blanket is laid on the bottom layer of the roadbed and then laid; s7, geogrids are laid; s8, maintenance is conducted; through fine selection and proportioning of the raw materials, efficient resource utilization of various industrial solid wastes is realized.

This utility model discloses a detachable multi-faceted aluminum panel ceiling design structure, comprising: a frame layer, which includes fixed angle brackets, longitudinal angle steel, transverse supporting keel, clamps, and threaded rods; a Z-shaped keel, which has several waist-shaped holes arranged along its own length, with the bottom of the threaded rod passing through the waist-shaped holes and fixed by nuts, and the bottom of the Z-shaped keel having a fastening groove; and a rhomboid aluminum panel, with a first hook edge at one end and a second hook edge at the opposite end, the first hook edge of one rhomboid aluminum panel fastening into the fastening groove, and the second hook edge of an adjacent rhomboid aluminum panel fastening into the gap between the fastening groove and the first hook edge. Compared with the prior art, this utility model solves the problems of slow installation speed and inconvenient disassembly of existing aluminum panel ceiling structures.

The utility model relates to the technical field of pile drivers, in particular to a pile driver convenient to move, and solves the technical problems that a fixing structure of the pile driver is often troublesome to disassemble, and time of workers is wasted. According to the technical scheme, the pile driver convenient to move comprises universal wheels, a bottom plate, a handrail, a storage box, a height adjusting assembly, a power transmission assembly and a drilling assembly; through cooperative operation of the height adjusting assembly and the power transmission assembly, the height of the fixing rod can be accurately adjusted, it is guaranteed that the fixing rod is smoothly inserted into the ground, and therefore the pile driver is stably fixed, the deviation problem caused by vibration in the working process is effectively prevented, and it is guaranteed that the pile driving position is accurate; and through cooperation, the stability of the fixing rod during rotation is enhanced, the fixing rod can be firmly fixed in the ground and is combined with efficient operation of the drilling assembly, the overall operation efficiency of the pile driver is improved, and great convenience is brought to the construction process.

This application discloses a sludge solidification agent, its preparation method, and its application, belonging to the field of sludge solidification technology. The sludge solidification agent comprises solid waste composite powder, a composite activator, and a microbial self-healing agent. The microbial self-healing agent is a chitosan-bentonite microcapsule loaded with Bacillus pasteurellii. The Bacillus pasteurellii is encapsulated within a protective layer composed of chitosan and bentonite using microencapsulation technology, thus maintaining dormancy and high activity during long-term storage. Through dual modification of the key components of the activator (hydrophobic microcapsules encapsulating water glass and surface passivated gypsum), the problems of pre-reaction and clumping failure due to moisture absorption in single-component powders are solved. The introduction of specific organic regulators (xanthan gum and casein) significantly improves the solidification effect on high-organic-matter sludge. Therefore, the sludge solidification agent provided in this application can achieve long-term microbial survival, dry-state stability of the activator, and efficient solidification of high-organic-matter sludge.

The invention relates to the technical field of civil engineering foundation pit supporting, in particular to a hoisting method for a large steel structure in semi-cover excavation construction of a subway station. Comprising an open excavation area and a cover excavation area; the steel structure is conveyed into the foundation pit from the open excavation area through a crane and conveyed to the cover excavation area from the interval area between the middle pile bodies; the position of the walking vehicle is adjusted, and the height of the carrier roller frame is adjusted through the lifting mechanism to correspond to the position of the conveyed steel structure; after the steel structure penetrates through a steel rope ring connected with the first electric hoist, the steel structure is conveyed to the small trailer, and the left end of the steel structure is located on the left side of the small trailer; the small trailer carries the steel structure to walk leftwards for a certain distance and is lifted by the steel rope ring connected with the electric hoist, and the small trailer and the steel structure jointly convey the steel structure to the steel enclosing purlin and are manually connected; after the steel structure in the area is installed, the walking beam is started to move forwards along the hanger rail, and the chain drives the walking vehicle to move to the next construction position at the same time. The method is simple in process, convenient to operate, high in construction efficiency and small in resource waste.

The application discloses a drilling cementing wall stabilizing agent and a preparation method and application process thereof, and belongs to the technical field of oil field chemistry, and particularly relates to a preparation of the drilling cementing wall stabilizing agent. The preparation method of the drilling cementing wall stabilizing agent can be that thermoplastic resin, a curing agent and inorganic powder are uniformly mixed and stirred at normal temperature and normal pressure according to proportions. The wall stabilizing agent material has the advantages of simple production process, safety, low material cost and convenience for large-scale production and application. The product can not only plug pores and reduce filtration loss, but also cement sand and mudstone strata and improve stratum pressure-bearing capacity, so that the purpose of stabilizing a well wall is achieved. The application further provides an application process of the drilling cementing wall stabilizing agent, which comprises a suitable drilling fluid system and an adding amount and construction process under different stratum porosities and different working conditions.

The utility model relates to a special-shaped broken line glass curtain wall installation structure which comprises a plurality of pieces of glass, a stand column and cross beams, each piece of glass is fixed with the stand column through an aluminum alloy accessory in the vertical direction, each cross beam is fixed with the glass through an aluminum alloy auxiliary frame and a pressing block, the cross beams are fixed with the stand column through stainless steel plug pins, and the stand column is obliquely arranged. The combined adapter is connected with the steel tube, and the steel tube is welded with the embedded part; and the combined adapter is connected with the steel tube through the stainless steel pin shaft, so that the mounting angle of the combined adapter is convenient to adjust, the mounting angle of the upright post is adjusted, and the glass curtain wall in a continuous sawtooth fold line shape is formed. The aluminum alloy accessories are connected with the stand columns through heat insulation strips. A cavity in the corner of the stand column is filled with polyurethane foam for heat insulation and sealed by double silicone sealants. The glass curtain wall in a continuous sawtooth fold line shape is installed, the problem that the cold bridge effect of the fold angle portion is obvious is solved, and the overall energy-saving performance of the curtain wall is guaranteed.

The invention relates to an ecological dredging bottom mud water thermal phase change vacuum preloading dehydration drying system and method, and the system comprises a vertical drainage system which comprises a plastic drainage plate, a drainage branch pipe and a double-hand-plate joint; the vacuum loading system comprises a vacuum pump and a water-vapor separation tank, the water-vapor separation tank is connected with a drainage main pipe, and the drainage main pipe is connected with a drainage branch pipe through a tee joint; the high-temperature hot water circulation loading system comprises a heat preservation heating water tank, a water guide main pipe, steel wire hoses and U-shaped heating pipes, the heat preservation heating water tank is connected with the steel wire hoses through the water guide main pipe, and the steel wire hoses are connected with the U-shaped heating pipes; the temperature control system is used for detecting the water temperature of the heat-preservation heating water tank and heating the heat-preservation heating water tank; the sealing system comprises geotechnical cloth and polyvinyl chloride sealing films, the geotechnical cloth is laid in a layered mode, and the polyvinyl chloride sealing films are pressed into the film pressing grooves in the boundary of the dehydration area respectively. The bottom is heated by adopting a hot water circulating system, the bottom mud is heated, the permeability of the bottom mud is improved, and rapid dehydration and drying are realized in combination with vacuum preloading.

The invention discloses a PCCP pipe bell and spigot joint sealing system manufacturing method and a PCCP pipe bell and spigot joint sealing system manufactured through the PCCP pipe bell and spigot joint sealing system. During manufacturing, a joint is filled with an elastic blocking piece, the elastic blocking piece is divided into a first sub-joint and a second sub-joint, and the elastic blocking piece is arranged in the joint in an abutting mode through a locking mechanism; mortar is poured into the first sub-joint through a reserved first grouting opening, and the locking mechanism is removed after the mortar does not flow; a base layer is arranged on the upper end face of an upper opening of the second sub-joint, anticorrosive paint is applied to the base layer to form an anticorrosive coating, the anticorrosive coating and the base layer form a plugging structure and seal the second sub-joint, and sealant is poured into the second sub-joint through a reserved second grouting opening; the elastic barrier piece is basically non-sticky to mortar and the like; the method is suitable for construction in the low-temperature environment, the obtained sealing system can adapt to different stress interferences and different environmental factors, lasting sealing can be achieved, the construction technology can be simplified after the anti-corrosion coating is formed in a front-arranged mode, and the construction speed is high.

A box girder coiled steel bar machining device comprises a coiled steel bar hanging device, a straightening and cutting machine and a straight steel bar directional placing device. The coiled steel bar hanging device comprises a support, a supporting arm inclining upwards is fixed to the support, and coiled steel bars are hung through the supporting arm. The straight steel bar directional placing device comprises a guide groove, the input end of the guide groove is right opposite to the output end of the straightening and cutting machine, a vertical rod assembly is arranged on one side of the guide groove, and vertical rods in the vertical rod assembly are arranged in multiple rows at intervals from one side of the guide groove to one side away from the guide groove and form a straight steel bar placing groove. The height of a vertical rod in the vertical rod assembly is gradually reduced from one side of the guide groove to one side far away from the guide groove; multiple sliding rods are arranged at the upper end of the vertical rod assembly, one end of each sliding rod is close to the guide groove, and the other end of each sliding rod downwards points to one containing groove. According to the box girder coiled steel bar machining device, various finished steel bars can be stacked in a classified mode.

The present invention discloses an asymmetric T-shaped support system with few pivot points, including a T-shaped steel member and a parallel connection. The T-shaped steel member is the main load-bearing member of the support system, and is used to transfer the upper load to the lower support pile. The parallel connection is arranged above the T-shaped steel member, and the adjacent T-shaped steel members are connected to form a frame system. The steel column of the T-shaped steel member of the present invention can be reliably connected to the support pile, and is less constrained by the flatness of the ground and the bearing capacity of the foundation. The steel column and the crossbeam are integrally welded, and can be prefabricated in the factory, with good integrity, simple construction process, and short construction period. The adjacent T-shaped steel members are connected as a whole by the parallel connection, which improves the rigidity and stability of the system.

The present invention provides a long-distance tunnel mud shield inlet and outlet mud pipe rapid removal device and a use method thereof, wherein guardrails are provided on both sides of the platform above the transport vehicle, a driving system is provided inside the transport vehicle, a lifting column is provided on one side of the transport vehicle, a boom is provided on the top of the lifting column, a hanger is hinged at the end of the boom, and the hanger lifts the mud pipe onto the transport vehicle platform. The lifting equipment lifts the mud pipe, and after lifting, it is transferred to the transport vehicle through the walking mechanism. The present invention has a simple construction process, and can safely and quickly remove and transport the mud pipeline. The shield inlet and outlet mud pipe rapid removal device has the advantages of rapid removal, safety, high efficiency, and cost saving.

The invention provides a cold rolling process steel structure column installation method, and belongs to the technical field of steel structure construction.The method comprises the steps that slurry blocks are constructed at the positions, corresponding to the four corners of a fixing plate at the bottom of a steel structure column, of a base, two inclined base plates are placed on the tops of the slurry blocks, the lower ends of the two inclined base plates are oppositely arranged, and the inclined faces of the inclined base plates located on the outer sides face downwards; the inclined plane of the inclined base plate located on the inner side faces upwards, and the inclined plane of the inclined base plate located on the outer side is erected on the inclined plane of the inclined base plate located on the inner side, so that the top face of the inclined base plate located on the outer side forms a stress supporting face for the steel structure column. The levelness and perpendicularity of the steel structure column can be rapidly and accurately adjusted, one-time forming installation can be achieved, the installation precision requirement is guaranteed, the construction technology is simple and convenient, and the installation efficiency of the steel structure column is effectively improved.

The application discloses a high-temperature curing ablation-resistant and heat-insulating two-component coating and a preparation process. The coating is composed of A component and B component. The A component comprises modified epoxy resin, liquid butyronitrile rubber, aluminum hydroxide powder, chromium trioxide, high-silica fiber powder, hollow glass microbead and toluene; the B component is a curing agent and a curing accelerator. In the preparation, the aluminum hydroxide powder, the chromium trioxide, the high-silica fiber powder and the hollow glass microbead are made into a filler dispersion liquid; then the epoxy resin and the liquid butyronitrile rubber are made into a resin-rubber mixture; then the filler dispersion liquid is slowly and uniformly added into the resin-rubber mixture under stirring, and the A component is obtained by soaking in a static magnetic field at room temperature and grinding; the curing agent and the curing accelerator are the B component. By optimizing the coating composition, the ablation resistance and the heat-insulating performance of the coating can be obviously improved by coating a single layer, the construction process is simplified, the coating thickness is reduced, and the high-temperature resistance of the coating is improved.

The invention discloses a pipe-jacking working well supporting structure and a construction method thereof.The pipe-jacking working well supporting structure comprises row piles and inner supports, the row piles are prestressed pipe piles, the prestressed pipe piles are arranged according to the shape of the cross section of a pipe-jacking working well to form supporting piles, and top beams used for pressing and fixing the prestressed pipe piles are installed at the tops of the prestressed pipe piles; a plurality of inner supports are horizontally arranged in the supporting piles in the height direction of the working well, the inner supports abut against the prestressed pipe piles, and a plurality of crawling devices used for achieving crawling of the inner supports in the height direction of the working well are installed between the inner supports and the supporting piles. The member is high in repeated utilization rate, low in construction cost and short in construction period.

The invention discloses a water pumping steel pipe, an underground diaphragm wall groove wall stable construction system and a construction method.The novel water pumping steel pipe is formed by connecting an inner-layer steel pipe, an outer-layer steel pipe, a top steel plate, a bottom steel plate and a plurality of steel plates, the steel plates are arranged between the pipe walls in the pipe length direction, water inlet holes can be formed in the outer pipe wall at the designated position, and water filtering holes are formed in the inner pipe wall; the novel water pumping steel pipes in rows are embedded in the two sides of the groove wall, the drilling step of conventional underground water pumping pipe arrangement is not needed, the steel pipes interact with the soil body, the horizontal lateral movement of the soil body can be limited through the soil arching effect, the groove wall of the underground diaphragm wall is stabilized from the outer side, and the water pumping effect of the underground diaphragm wall is improved. For the position where a weak soil layer is located, water pumping operation is conducted through the water pumping steel pipe, formation of mud cakes in the groove wall of the area is accelerated, the mud wall protection effect is improved, the groove wall of the underground diaphragm wall is stabilized from the inner side, meanwhile, the pressed-in water pumping steel pipe can be pulled out for cyclic utilization, and the construction cost is reduced.

The invention relates to the technical field of foundation construction, and provides a construction process for replacing and filling construction waste in a culvert foundation, which comprises the following steps: obtaining the construction waste, sorting, classifying and pretreating the construction waste, removing impurities in the construction waste, and obtaining regenerated filler with preset grading; excavating and treating a foundation pit; and layered filling and compaction are conducted, specifically, the regenerated filler is filled into the foundation pit in a layered mode, and compaction equipment is adopted for compaction after each layer of regenerated filler is filled. By means of the arrangement, harmful impurities in construction waste can be removed, the strength, quality and uniformity of regenerated filler can be guaranteed, the uniformity of the filler can be guaranteed through layered filling, the compactness and stability of the filler can be effectively controlled, gaps in the filler can be reduced through layered compaction, the compactness and bearing capacity of each layer of filler are guaranteed, and the construction efficiency is improved. Therefore, the overall stability and bearing capacity of the foundation are ensured.

The present invention provides a multilayer fluorine film for heat sealing welding, the multilayer fluorine film comprises three fluorine film layers, including a first heat sealing welding layer, a structural support layer and a second heat sealing welding layer in sequence; the total thickness of the multilayer fluorine film is 10 to 250 μm; wherein the thickness of the structural support layer accounts for 60 to 98% of the total thickness, the thickness of the first heat sealing welding layer accounts for 1 to 20% of the total thickness, and the thickness of the second heat sealing welding layer accounts for 1 to 20% of the total thickness; the structural support layer is one or both of FEP fluorine film and PFA fluorine film, and the first and second heat sealing welding layers are ETFE fluorine films. The present invention changes the structure of the heat sealing welding material and optimizes the raw material composition of the structural support layer. The prepared multilayer fluorine film can reduce the initial sealing temperature of the heat sealing welding material while taking into account the temperature resistance and enhance the heat sealing strength of the heat sealing welding material, can solve the bonding problem of polytetrafluoroethylene products and other materials, and expand the application field of polytetrafluoroethylene products.