29results about How to "Good water stop effect" patented technology

The modular assembly type double-row HU construction method pile supporting structure comprises a front row of parallel HU construction method piles and a rear row of parallel HU construction method piles, each row of HU construction method piles is composed of H-shaped steel piles and U-shaped steel sheet piles, the U-shaped steel sheet piles are meshed with one another through locking openings to form a continuous steel sheet pile wall, the H-shaped steel piles are inserted between the steel sheet pile walls formed by the U-shaped steel sheet piles, and the H-shaped steel piles and the U-shaped steel sheet piles are arranged in parallel. Top beam outer side steel plates are arranged on the outer sides of the tops of the H-shaped steel piles, top beam inner side steel plates and connecting beam modules are arranged on the inner sides of the tops of the front row of H-shaped steel piles and the inner sides of the tops of the rear row of H-shaped steel piles, and soil between piles of the double-row steel plate pile wall and soil in a passive area of the foundation pit are reinforced through double-shaft or three-shaft cement mixing piles. The double-row HU construction method pile enclosure structure is composed of the front row of parallel HU construction method piles, the rear row of parallel HU construction method piles, the prefabricated assembly type top beams, the connecting beams and other main components, the overall stability and bearing capacity of the structure are enhanced, and the double-row HU construction method pile enclosure structure has the advantages of being good in water stopping effect, flexible and rapid in construction, economical, environmentally friendly and the like.

The present invention discloses a small curvature radius tunnel shield starting steel box, including a steel box support part and a water stop part arranged on the steel box support part; the steel box support part includes a steel box base and a pre-buried steel ring arranged on the upper end of the steel box base; the water stop part includes a water stop steel ring fixedly connected to the pre-buried steel ring, a first curtain rubber plate is fixedly connected to the inner side of the pre-buried steel ring, a second curtain rubber plate is fixedly connected to the inner side of the water stop steel ring, the first curtain rubber plate and the second curtain rubber plate are respectively located on both sides of the water stop steel ring, the present application has good water stop effect, and the leakage water is controllable, and can be applied to shield construction with complex geological structure and surrounding construction environment and rich groundwater strata. Because its wedge-shaped structure is controllable, it can be applied to shield construction under different curvature radii and linear shield construction by changing the geometric size of the wedge-shaped body.

The present invention provides a method for calculating the radius of the RJP water-stop curtain for a station using the pile method in a water-rich stratum. An RJP rotary jet pile is arranged between two adjacent cast-in-place piles. The RJP rotary jet pile overlaps the cast-in-place piles on both sides to form a water-stop curtain. The center of the RJP rotary jet pile is equidistant from the center of the cast-in-place piles on both sides. The center of the RJP rotary jet pile is on a straight line with the center of the cast-in-place piles on both sides. The calculation formula for the minimum radius of the RJP rotary jet pile is as follows: In the above formula, r is the minimum radius of the rotary jet pile, in m; R is the radius of the cast-in-place pile, in m; L is the minimum overlap arc length of the rotary jet pile, in m; S is the distance between two adjacent cast-in-place piles, in m. The present invention reduces the amount of water-stop materials used and reduces costs while ensuring the water-stop effect of the underground excavation station.

The present application relates to a kind of for locking steel pipe pile cofferdam water stop pressure grouting device, including a support frame, pressure grouting pipe, annular air bag and inflation pipe;The support frame includes upper support plate and lower support plate, there is a certain interval between upper support plate and lower support plate and welding connecting rod, multiple buckles are arranged in equidistance rotation on the edge of upper support plate, and the lower end of buckle is located below upper support plate and is inclined to the outside of upper support plate upwards;Pressure grouting pipe vertically penetrates upper support plate and lower support plate;Annular air bag is located between the upper support plate and lower support plate of support frame, annular air bag can extrude the lower end of buckle to rotate to the outside of upper support plate in inflation state, and its annular outside surface protrudes to the outside of upper support plate and lower support plate;Inflation pipe penetrates upper support plate and inflates and deflates air bag.The present application can be combined with rock by the way of high-pressure grouting to press cement slurry from inside steel pipe pile to outside steel pipe pile, so that steel pipe pile is closely combined with rock, and the water stop effect of steel pipe pile cofferdam is improved.

The invention belongs to the technical field of drilling water stopping, and particularly relates to a drilling internal water stopping device which comprises a wooden plug, annular notch grooves are formed in the outer walls of the upper end and the lower end of the wooden plug, water stopping belts adhere to the interiors of the two annular notch grooves, a feeding pipeline is fixedly installed at the center of the wooden plug, and a check valve is arranged in the middle of the feeding pipeline. Mounting grooves are formed in the upper end and the lower end of the wooden plug correspondingly, stainless steel limiting discs fixedly sleeve the outer sides of the upper end and the lower end of the feeding pipeline correspondingly, the two stainless steel limiting discs are located on the inner sides of the two mounting grooves correspondingly, and hard rubber adheres to and sleeves the outer sides of the two stainless steel limiting discs correspondingly; and the hard rubber abuts against the mounting groove for sealing. The device is simple in structure, is made of common materials which can be obtained nearby, is low in manufacturing cost, does not affect the in-hole structure during installation, has the advantage of being convenient to construct, and is good in water stopping effect.

The present invention relates to the technical field of hydraulic engineering construction, and is an assembled gravity concrete cofferdam and a construction method thereof, wherein the assembled gravity concrete cofferdam comprises a lower cofferdam wall and an upper cofferdam wall; the lower cofferdam wall is composed of a plurality of concrete caissons spliced ​​in sequence; the upper cofferdam wall is arranged on the top of the lower cofferdam wall, and the upper cofferdam wall comprises a first breast wall and a second breast wall, the first breast wall is placed on the edge of the top of the concrete caisson on the backwater side, the second breast wall is placed on the edge of the top of the concrete caisson on the water-facing side, the first breast wall and the second breast wall are respectively composed of a plurality of concrete modules spliced ​​in sequence, and slag is backfilled between the first breast wall and the second breast wall; wherein the top of each concrete caisson in contact with the bottom of the first breast wall and the second breast wall is provided with a leveling layer, and a water stop is provided on the top of the leveling layer between the concrete caisson and the second breast wall. The assembled gravity concrete cofferdam is easy to install and disassemble, and is easy to stop water.

The utility model discloses a mining deep development drilling water stop device, and particularly relates to the technical field of drilling water stop, the mining deep development drilling water stop device mainly comprises an electric cylinder, the output end of the electric cylinder is fixedly connected with a grouting pipe, and the outer wall of the grouting pipe is provided with a plugging mechanism; the plugging mechanism comprises an extrusion sleeve disc slidably mounted on the outer wall of the grouting pipe, a sealing rubber ring is fixedly bonded to the top end of the extrusion sleeve disc, and an extrusion branch disc is fixedly connected to the bottom end of the extrusion sleeve disc. A pushing electric cylinder is installed below the extrusion supporting disc and located on one side of the grouting pipe, and the top end of the pushing electric cylinder is fixedly connected with a pushing block. The plugging mechanism is adopted, the extrusion sleeve disc carries the sealing rubber ring to conduct upward extrusion, the sealing rubber ring can be extruded at the edge position of an inlet of the mining deep development drill hole, water-stop mortar is pressurized through the filling pipe to enter the grouting pipe, filling plugging of the inlet position of the mining deep development drill hole can be achieved, and the water-stop effect is better.

The utility model provides a bottom shaft water stop device for a steel dam gate and the gate, the bottom shaft water stop device comprises a bottom shaft, a base and water stop rubber, and the water stop rubber is fixed on the base; the water stop rubber comprises a main body part and a water stop part, the water stop part comprises a water stop surface, and the water stop surface is in contact with the surface of the bottom shaft to stop water; a silt shoveling end is arranged on the upper portion of the water stopping part and attached to the surface of the bottom shaft, the upper surface of the silt shoveling end gradually rises in the direction close to the bottom shaft, and when the bottom shaft rotates, the surface of the bottom shaft rotates relative to the silt shoveling end. Through the design, deposition of silt or floating objects on the water stop piece can be reduced, meanwhile, abrasion of the water stop rubber is reduced, and the water stop effect is guaranteed.

This invention provides a precast tensile joint panel and a pressurized repair method for joints in rockfill dams. The precast panel allows for rapid on-site installation, avoiding the cracking and watertightness issues common in cast-in-place panels during strength development. The precast panel is pre-embedded with inflatable steel pipes and pressurized grouting steel pipes, enabling pressurized testing and repair of the joint structure. This invention improves the bottom W-shaped copper waterstop structure of the cast-in-place concrete panel to an Ω-shaped copper waterstop suitable for precast panels. The Ω-shaped copper waterstop has a rubber rod and polyurethane foam board at the nose, and joint-sealing rubber strips on both sides. Between the upper and lower Ω-shaped copper waterstops is a zoned rubber strip, which is heat-fused to the joint-sealing rubber strip, resulting in excellent water-stopping effect and high seepage prevention. The pressurized repair method of this invention ensures the integrity of the waterstop by checking the joint structure through zoned pressurized testing. If the waterstop is not completely sealed, grouting is performed on the joint surfaces of the zoned sections through the pre-installed pressurized grouting steel pipes to achieve the required water stoppage.

The present invention relates to a multifunctional drainage hole orifice device that is adaptive to irregular hole wall structures. The orifice device includes a main pipe, an end cover, a pressure ring and a pressure cover. The main pipe is provided with an end cover at one end and a pressure cover at the other end. A plurality of pressure rings are sleeved on the main pipe, and the plurality of pressure rings are arranged between the end cover and the pressure cover. Rubber rings and water-expandable water-stop rings are alternately arranged between adjacent pressure rings. The present invention solves a series of problems that the existing orifice device is not adapted to irregular hole wall structures, has a single purpose, is not adaptable, is inconvenient to install, has insufficient anchoring force, has a small flow area, and is inconvenient to repair. Compared with the existing drainage hole orifice device, the present invention is adapted to various irregular hole wall structures and has a good water-stopping effect. A plurality of water-expandable water-stop rings are used to replace elastic rubber rings. When there is water in the drainage hole, the water-expandable water-stop ring will further expand fully to actively fill the irregular gaps, ensure close contact with the irregular hole wall, and exert a good water-stopping effect.

The invention relates to the technical field of port protection embankments and foundation pit engineering supporting, and particularly discloses a combined supporting structure of H-shaped UHPC piles and hollow dumbbell-shaped UHPC piles, which comprises a plurality of H-shaped UHPC piles arranged on the periphery of a port protection embankment or a foundation pit at intervals, and a hollow dumbbell-shaped UHPC pile is arranged between every two adjacent H-shaped UHPC piles. The top of the H-shaped UHPC pile and the top of the hollow dumbbell-shaped UHPC pile are connected with a top beam. The combined supporting structure of the H-shaped UHPC piles and the hollow dumbbell-shaped UHPC piles has the advantages of being high in construction efficiency, low in manufacturing cost, good in stability and corrosion resistance and good in water stopping performance.

The invention relates to the technical field of engineering structures, and particularly discloses an underground structure permanent assembly whole-process prefabrication system and a construction method thereof, the underground structure permanent assembly whole-process prefabrication system comprises enclosure members, structural permanent columns, a first support, a second support, a uniform stirring body and a structural outer wall; a plurality of enclosure components and a plurality of structural permanent columns are arranged; the enclosure components are distributed in parallel along the uniform stirring body and are distributed in a staggered manner in the vertical direction; one sides of the multiple enclosure components are detachably connected into the uniform stirring body to form a prefabricated enclosure wall, the prefabricated enclosure wall and the basement structural wall are combined to form a combined outer wall structure, and a second concrete enclosure purlin is fixedly arranged on the other sides of the multiple enclosure components; a first concrete enclosing purlin is fixedly arranged on the upper end faces of the enclosure components. According to the method, assembly of the construction process can be achieved, the construction speed and the construction quality are effectively controlled, overall stress of the underground structure is achieved, and deformation generated in the construction process of the underground structure and the influence on the surrounding environment are effectively controlled.

The application relates to a deep-water pebble covering layer buried type lock steel pipe pile cofferdam water stop construction method, a steel casing is first inserted and driven at a designed insertion and driving position of a steel pipe pile, the steel pipe pile is inserted and driven to a rock layer below a pebble covering layer, a large-diameter steel pipe pile hole is formed, then clay is backfilled in the steel casing, and the steel casing is pulled out; a plurality of slurry outlet holes are formed on a pipe wall of a lower end of the steel pipe pile in advance, the steel pipe pile is inserted into the pile hole, clay in the steel pipe pile is removed, a grouting device is placed in the steel pipe pile, the grouting device forms a closed space in the steel pipe pile, cement slurry is pressed into the steel pipe pile through the grouting device, the cement slurry is pressed into a space between the steel pipe pile and the rock layer through the slurry outlet holes on the steel pipe pile under high pressure, the steel pipe pile is firmly combined with the rock layer, the steel pipe pile can be kept stable under the action of water flow impact, water outside the cofferdam can be prevented from penetrating into the cofferdam from the space between the steel pipe pile and the rock layer, and therefore the water stop effect of the cofferdam is improved.

The invention discloses a composite filter element water stop structure which comprises a water passing connector and a filter bottle which are matched with each other, the water passing connector is fixedly connected with a filter element seat, the filter bottle is detachably connected with the filter element seat, and the composite filter element water stop structure further comprises a first rotating part arranged between the filter element seat and the water passing connector. The first rotating piece and the water passing connector are in end face sealing fit through a first sealing ring, and the first rotating piece can rotate relative to the water passing connector so that a water passing opening of the first rotating piece can be communicated with or staggered from a water passing opening of the water passing connector. The water purifier further comprises a second rotating part, the end face sealing fit between the second rotating part and the filter bottle is realized through a second sealing ring, and the filter bottle can rotate relative to the second rotating part, so that the water passing opening of the second rotating part is communicated with or staggered from the water passing opening of the filter bottle; under the condition that the occupied space is small, it can be guaranteed that the overall structure has an excellent water stop structure.

The present invention discloses a steel-concrete combined wedge-shaped waterstop structure, including a channel foundation and a waterstop block, wherein the channel foundation has a wedge-shaped channel, the waterstop block is a wedge-shaped structure matching the shape of the wedge-shaped channel, and rubber waterstop strips are arranged on the bottom surface and both sides where the waterstop block is in contact with the wedge-shaped channel body. The present invention can convert the unidirectional water pressure borne by the end of the structure into an extrusion force on the rubber waterstop strip on the side by designing the channel of the wedge-shaped structure to cooperate with the waterstop block, and the dock door load on the top can be converted into an extrusion force on the rubber waterstop strip on the bottom. The greater the pressure, the tighter the rubber waterstop strip is pressed, and the better the waterstop effect is, thereby achieving a good waterstop effect. The waterstop steel plate and the rubber waterstop strip are designed to jointly form a continuous waterstop surface, thereby ensuring the waterstop performance of the structure; the guide steel plate with a slope is designed to ensure that the waterstop block is accurately positioned and bottomed, thereby realizing automatic positioning and pre-tightening during installation.

A water-rich sandy gravel stratum shield construction grouting method comprises the steps that S1, special pipe pieces are prefabricated, and grouting holes are reserved; s2, mounting an anchoring film and assembling an anchoring ring; s3, adjacent special pipe pieces of the anchoring ring are spliced; s4, shield tunneling construction is carried out; and S5, secondary grouting construction of the duct piece is conducted. According to the shield construction grouting method, the synchronous grouting process is improved, slurry can be prevented from being washed away by water, and the strength of the solidified slurry is guaranteed; the grouting range can be restrained, and the uncertainty of grout diffusion is solved; the grouting body outside the pipe piece forms a whole surrounding the pipe piece, and the reinforcing effect and the water stopping effect are good; and compared with double-slurry synchronous grouting, the method has the advantages of simple and convenient process and low cost.

The present invention discloses a rolling gate valve, including a housing, a gate plate, and a lifting mechanism. A left-right moving mechanism is also installed on the right side of the gate plate. The left-right moving mechanism is mainly composed of a moving cylinder sleeve front plate and a moving cylinder sleeve assembly. The moving cylinder sleeve front plate is installed with two pairs of upper and lower rollers, and the rollers are equipped with guide rails. The moving cylinder sleeve assembly is mainly composed of a moving oil cylinder, a moving piston rod, a moving piston, and a moving oil cylinder control oil circuit. The moving oil cylinder is installed on the right side of the moving cylinder sleeve front plate. The left end of the moving piston rod is fixed to the gate plate, and the right end is placed in the moving oil cylinder and a moving piston is installed on its outer cylindrical surface. The moving piston divides the inner cavity of the moving oil cylinder into two left and right oil chambers. The two oil chambers are connected to the main oil circuit of the gate valve through the moving oil cylinder control oil circuit. The seal of the present invention has less wear, greatly reduces the power of the starting device, reduces mechanical wear, and prolongs the service life of the gate valve.

The invention discloses a toilet assembly type partition wall board construction system and a use method thereof. The system comprises a partition wall board main body, a wall board transverse connecting assembly, a wall board longitudinal connecting assembly, an embedded water stop strip, a first arc-shaped arch and a second arc-shaped arch. A pipeline auxiliary passing unit; a T-shaped water stop strip is pre-buried in the floor slab and is matched with the lower partition wall board with the arc-shaped arching bottom side, so that a better water stop effect is achieved; by means of the construction technology, the problems that a traditional water stop ridge is poor in water stop effect, and leakage is likely to be caused due to a construction joint between a secondary structure and the water stop ridge are solved, the working procedure of making the water stop ridge is omitted, cost is greatly reduced, and the construction period is greatly shortened; in addition, after the sectional partition wall is installed, due to the fact that criss-cross cavities are formed by the arc-shaped arching structures on the bottom side, concealed pipes can be laid, damage to the wall surface caused by later-period wall surface grooving is reduced, meanwhile, the problem that transverse grooving of a traditional assembly type partition wall board is difficult is solved, the engineering cost is greatly reduced, and the construction period is shortened.

The utility model relates to the technical field of building construction, and discloses a dewatering well plugging structure in a foundation pit, which comprises a lower sealing plate, a sleeve is vertically arranged on the lower sealing plate, and a plugging hole communicated with the sleeve is arranged on the lower sealing plate in a penetrating manner; a water stop ring is arranged on the sleeve, and a plugging cover is arranged at the top end of the sleeve; a cushion layer is arranged on the lower sealing plate, a waterproof layer is arranged on the cushion layer, and a protective layer is arranged at the top end of the waterproof layer; the well mouth plugging device is simple in structure, convenient to install and operate and capable of greatly enhancing tightness of well mouth plugging, guaranteeing the sealing effect and meanwhile improving the construction efficiency.

The present invention discloses a wall seam water-stopping device for underground continuous wall sleeve milling process and its use method, comprising a plurality of grouting units, the grouting units comprising a main grouting pipe and a plurality of retractable auxiliary grouting pipes; the retractable auxiliary grouting pipe comprises an interface pipe, an outer sleeve and a retractable inner pipe which are sequentially connected with the corresponding main grouting pipe; the outer sleeve is sleeved on the corresponding interface pipe; the retractable inner pipe is arranged in the corresponding outer sleeve and can move axially along the inner hole of the outer sleeve; a spring is arranged between the retractable inner pipe and the interface pipe, and a limit pin is arranged in the retractable inner pipe; a pull-out steel core is arranged in the main grouting pipe; the pull-out steel core and the limit pin are tightened by a limit rope ring. During the pouring, a plurality of grouting units are first arranged in the steel cage of the pouring wall body; when pouring the first pouring wall body, the pull-out steel core is pulled out to make the retractable inner pipe pop out; after the pouring of the second pouring wall body, the wall seam light column slurry can be used to form water-stopping. The present invention can achieve a better wall seam water-stopping effect and reduce the construction risk caused by water leakage.

The mouth-locking steel pipe pile comprises a plurality of steel pipe pile bodies arranged on the periphery of an enclosing purlin in a surrounding mode, four pieces of first channel steel are symmetrically welded to the periphery of each steel pipe pile body, and openings of the first channel steel are arranged towards the two sides and used for being connected with inserting plates subsequently; a stiffening steel plate is connected between the first channel steel and the steel pipe pile body. The lock opening is used as a position with weak bending resistance, so that the bending resistance is enhanced. The space of the cavity is large, concrete pouring is economical, convenient, easy and feasible, and the cofferdam is good in water stopping effect.

The present invention discloses a special extrusion device for matching pipe fittings, belonging to the engineering field of pipe fitting connection technology. The special extrusion device includes an upper grinding head, a lower grinding head, an upper grinding head seat, a base and a power device. There are N raised ribs on the inner walls of the upper grinding head and the lower grinding head. During extrusion, the upper grinding head and the lower grinding head are butted from the upper and lower directions, and the inner walls of the two grinding heads form a cylindrical pipe fitting accommodating area. Through the present invention, it is possible to implement the extrusion of thin-walled ribbed pipe fittings, steel-plastic composite pipe fittings, pipe fittings and outer sleeve fittings sleeved thereon, especially when the latter two are extruded, the pipe fittings and their molding layers, the pipe fittings and the outer sleeve can all produce uniform deformation, so that the inner and outer pipe fittings are firmly connected together, which well solves the problems of unreliability, deformation, water leakage when connecting thin-walled pipe fittings, steel-plastic pipe fittings, and pipe fittings and outer sleeves.

The utility model discloses a double-layer water stop structure for a hydraulic structure, which comprises a first water stop piece, an upper water stop unit parallel to the first water stop piece and a second water stop piece for connecting the first water stop piece and the upper water stop unit together, and the second water stop piece is perpendicular to the first water stop piece. The second water stop piece is fixedly connected with the first water stop piece through a first connecting structure, the first connecting structure comprises a first connecting piece fixedly connected to the bottom of the second water stop piece and a first pressing piece arranged on the lower side of the first water stop piece, the first connecting piece and the first pressing piece are fixedly connected together through a rivet, and the first connecting piece is welded to the first water stop piece. The first connecting piece is integrally formed on the lower portion of the second water stop piece, reliable connection of a copper sheet water stop and a rubber water stop is achieved, the water stop effect of the connecting position can be effectively guaranteed, large-scale machining in a factory can be achieved, the welding quality is guaranteed, the field welding operation amount can be reduced, the later manual maintenance frequency and the later manual maintenance period are reduced, and the production efficiency is improved. And the water stopping effect is further improved.

The invention discloses a rubber sealing strip with sticking cloth and a production process of the rubber sealing strip sticking cloth, and relates to the technical field of rubber sealing strip sticking cloth. In the production process, a sealing strip sticking cloth machine is included, and a wiping mechanism used for wiping lint is arranged at one end of the sealing strip sticking cloth machine; and a blow-drying mechanism for blow-drying lint is arranged at one end of the sealing strip cloth sticking machine. By arranging the wiping mechanism and the blow-drying mechanism, the surfaces of the sealing strip body and the flannelette are wiped dry and then blow-dried, so that water stains cannot appear on the surfaces of the sealing strip body and the flannelette, and follow-up spraying cannot be affected, and by arranging the hot-melt polystyrene foam and the hot-melt butyl rubber, the sealing performance between the vehicle frame and the sealing strip body can be improved; when a vehicle wades, the outer frame of the vehicle door extrudes the sealing strip body, a good water stopping effect can be achieved through the water stopping lip on one side of the sealing strip body and the hot-melt polystyrene foam and the hot-melt butyl rubber arranged in the sealing strip body, water can be effectively prevented from entering the vehicle, and the vehicle can wade to run.

A shield construction grouting method for water-rich sand and gravel strata, the steps of which are: S1, prefabrication of special segments, and reservation of grouting holes; S2, installation of anchoring membranes and anchoring rings for assembly; S3, assembly of special segments adjacent to anchoring rings; S4, shield advancement construction; S5, secondary grouting construction of segments. The shield construction grouting method proposed by the present invention improves the synchronous grouting process, can prevent the slurry from being flushed out by water, and ensure the strength of the slurry after solidification; can restrict the grouting range, and solve the uncertainty of slurry diffusion; the grouting body outside the segment forms a whole surrounding the segment, and has good reinforcement and water-stopping effects; compared with the synchronous grouting of double-liquid slurry, it has the advantages of simple process and low cost.

The invention discloses a tunnel secondary lining double-fold formwork which comprises a primary support, a tunnel concrete secondary lining formwork is arranged below the primary support, the outer side of the tunnel concrete secondary lining formwork is movably connected with a first formwork through a hinge, and the upper end of the first formwork is connected with a second formwork through a bolt. According to the method, the position of a second-lining trolley is determined firstly, a first formwork and a second formwork are connected through bolts, bolt holes of the first formwork are long-strip-shaped, the height of the bolt holes can be adjusted, the bolt holes are fixed, the position of a middle-buried type rubber water stop belt is determined according to the thickness of the tunnel concrete second-lining formwork, then the bolts are tightened, and the second formwork and a third formwork are connected through bolts as well. The bolt holes of the third formwork are also long-strip-shaped (the principle is the same as that of the first formwork and the second formwork), the overall height of the formworks can be adjusted, the formworks abut against a tunnel waterproof layer by adjusting the height, after work is completed, the end formwork is fixed through square timbers and pull rods, all the formworks are connected through bolts, and then installation of the end formwork is completed.

The utility model discloses an aqueduct expansion joint leakage water treatment structure, belongs to the technical field of expansion joint treatment, and can solve the problems that a traditional expansion joint leakage water treatment mode is poor in repairing effect, complex in construction, large in difficulty and long in construction period. The structure comprises an anti-seepage adhesive layer arranged on the inner surface of the expansion joint; the flexible water stop material is embedded and filled in the expansion joint; the interface treatment layer is arranged on the concrete surfaces of the top and the two sides of the expansion joint; and the polyurea unit is arranged on the interface processing layer and is used for isolating external water vapor from entering the interface processing layer. The aqueduct expansion joint leakage water treatment device is used for aqueduct expansion joint leakage water treatment.

The utility model belongs to the field of municipal engineering, and provides a combined type waterproof curtain which comprises a high-pressure grouting body and an annular waterproof curtain surrounding the outer side of a deep foundation pit. The bottom of the deep foundation pit extends downwards into a moderately weathered rock stratum, a plurality of high-pressure grouting holes are formed in the moderately weathered rock stratum in the circumferential direction of the deep foundation pit at intervals, and the high-pressure grouting bodies are filled in the high-pressure grouting holes and fracture surfaces of surrounding rock stratums; the annular waterproof curtain comprises a plurality of high-pressure jet grouting piles, the high-pressure jet grouting piles are arranged in the circumferential direction of the deep foundation pit, every two adjacent high-pressure jet grouting piles are partially overlapped, and the bottoms of the high-pressure jet grouting piles downwards penetrate through the strongly-weathered rock stratum and stretch into high-pressure grouting bodies of the moderately-weathered rock stratum. According to the combined type waterproof curtain, two water stopping measures are adopted for achieving the synergistic effect, water seepage of the foundation pit is effectively prevented, the construction safety of the foundation pit is guaranteed, the combined type waterproof curtain is suitable for the rock-soil mixed deep foundation pit with the upper portion being a thick soil layer and the lower portion being a rock stratum, and the good foundation pit water stopping effect can be achieved.

The invention relates to a water-stopping material for a deepwater single-wall steel sheet pile cofferdam lock catch, which is formed by fully stirring and mixing epoxy resin and saw dust and is used for the abutted seam of the deepwater single-wall steel sheet pile cofferdam lock catch. The epoxy resin is low-molecular liquid bisphenol A epoxy resin; the mass ratio of the epoxy resin to the sawdust is 8: 2. According to the present invention, the lock catch can be subjected to large-area sealing by using the fluidity and the water stability of the epoxy resin, the saw dust is driven to flow, and the saw dust can completely expand to block the incompletely sealed position after entering the water by using the water absorption expansion property of the saw dust, such that the mixture is simple and rapid to prepare, and especially the saw dust material almost does not require the cost; the sealing material is suitable for large-scale application in the deepwater single-wall steel sheet pile cofferdam lock catch sealing process in the building industry and belongs to a special sealing material.