33results about How to "To achieve water-stop effect" patented technology

A composite soil pressure balance shield machine, comprising : shell (1), cutter head (2), soil storer (3), spiral conveyer (4) and impelling oil cylinder (6),it is characterized in that the said cutter head is set front of the shell, equipped with tearing knife (21) and the cutting knife (22), and the cutter point of the said cutting knife is a little back of the tearing knife; the soil storer is located rear the cutter head, and its wall surface is installed with injecting holes (32), the rear end is installed with pressure balancing equipment (5), and a soil outlet (31)is set under the soil storer; the inlet under the spiral conveyer connects the soil outlet of the container; the said impelling oil cylinder are uniformly installed along the shell inner wall. The shield machine solves the normal tunneling problem on sand or gravel eggs (gravel) layer of high water permeability, or the normal tunneling problem when it need to pass through more than 30 centimeters large stones and other obstructions.

The invention discloses an inner-support-free double-wall locking mouth steel bushing box cofferdam construction method and an inner-support-free double-wall locking mouth steel bushing box cofferdam. Firstly, unit blocks are processed in a factory and then transported to a construction region to be spliced and formed piece by piece, the spliced unit blocks are wholly hoisted to a target pier position at the preset elevation through a large hoisting ship, then construction steps of sludge suction, tenon type locking mouth plugging, sand cushion layer filling, concrete bottom sealing, water suction, foundation clearing, steel protection barrel cutting, pile head removing, whole abutment installation and the like are performed, finally whole dismantling is performed for usage of the next pier position construction. The inner-support-free double-wall locking mouth steel bushing box cofferdam comprises a side plate, a blade foot and a joint and is characterized in that the cofferdam is of a detachable structure, a plane is partitioned into blocks, the blocks are connected in a mode that tenon type locking mouths are combined with bolts, and the inner side is not provided with an inner support. Therefore, the inner-support-free double-wall locking mouth steel bushing box cofferdam has the advantages of being small in construction difficulty, short in construction period, low in cost input, small in material consumption, high in repeated usage times, capable of being wholly recycled, safe, reliable and the like.

The invention discloses an OC-type fore-shaft steel pipe pile structure, a steel pipe pile cofferdam and a self-compaction water stop method. The steel pipe pile structure comprises large-diameter steel pipes, C-shaped small-diameter steel pipes and O-shaped small-diameter steel pipes, wherein each C-shaped small-diameter steel pipe and the corresponding O-shaped small-diameter steel pipe are coaxial with the corresponding large-diameter steel pipe and are arranged on the outer circumference of the large-diameter steel pipe in a spaced mode. Each C-shaped small-diameter steel pipe is providedwith a notch in the axial direction, each O-shaped small-diameter steel pipe is provided with a rabbet, and each O-shaped small-diameter steel pipe is used for being embedded into the corresponding C-shaped small-diameter steel pipe on another adjacent large-diameter steel pipe. The steel pipe pile structure is simple and good in water stop effect.

The invention relates to a connecting part capable of enabling an upper pre-connection pipeline and a lower connection pipeline to communicate in a same layer drainage process, in particular to a drainage casing pipe capable of preventing odor and backflow. The drainage casing pipe capable of preventing odor and backflow comprises a horizontally arranged chassis and a vertically arranged casing pipe, wherein a through hole is formed in the chassis; the bottom end of the casing pipe is fixedly connected with the top surface of the chassis, and the through hole communicates with an inner cavityof the casing pipe; a drainage water stop joint device capable of deodorizing and preventing backflow is arranged on the top end of the casing pipe in a sleeving mode; and an annular drainage filter screen device capable of filtering impurities is arranged on the drainage water stop joint device in a sleeving mode. The drainage water stop joint device removes accumulated water of a floor through agap formed between an inner wall casing pipe and an outer wall casing pipe, liquid sealing is realized through a water stop ring part and a water proof ring part, and meanwhile, backflow caused by different air pressures is prevented. The drainage casing pipe capable of preventing odor and backflow has rich functions, the structure is simple, the installation is convenient, construction steps andmaterials are saved, and the functions of deodorization and backflow prevention while drainage can be realized.

The invention discloses an advanced grouting control method suitable for urban subway tunnels. According to the method, firstly, the length of each cyclic grouting pipe, the parameters of drilled holes and the arrangement mode of drilled holes are determined. Secondly, taking the layout diagram of drilled holes as a basis, a numerical simulation means is adopted for establishing a finite element analysis model about the diameter of grouting holes, the diameter of geotechnical cloth bags and the grouting amount. After that, the reinforcing effect of different geotechnical cloth bag expansion rates on the stratum, and the distribution situation of the corresponding displacement field, the corresponding stress field and the corresponding plastic area are analyzed. In this way, the optimal diameter of geotechnical cloth bags and the optimal grouting amount are determined. Thirdly, holes are drilled along the tunneling direction of a tunnel through a drilling machine, and a certain externalinsertion angle is formed in each drilled hole. Fourthly, a well prepared grouting pipe coated with the geotechnical cloth bag is put into a drilled hole. Sixthly, the slurry is injected into the grouting pipe, and then the slurry flows into the high-strength geotechnical cloth bag through slurry outlet holes. In this way, the geotechnical cloth bag is filled to expand. The final grouting amountis determined according to the numerical simulation calculation result. Finally, the grouting is carried out on the grouting pipe in a mode of spacing drilling and grouting, and a transverse grout stopping wall structure is formed.

The invention relates to a simple and fast water stop method of a Larssen steel sheet pile cofferdam. The method comprises the following steps: firstly, verticality of the steel sheet pile is guaranteed, a vibrating pile driver is used for carrying out inserting and driving to the steel sheet pile, and enough butter is arranged in a locking notch of the steel sheet pile in the process of inserting and driving so as to guarantee the quality of the locking notch; after water leakage is found in the water-pumping process, grading coarse, sawdust powder and cement are adopted for mixing and then a leak-stopping pipe is arranged at the outer side of the steel sheet pile above the water-leaking position; leak-stopping mixed material is placed downward to the position needing to stop leakage by the leak-stopping pipe; and the coarse, the sawdust powder and the cement and the like are absorbed into a locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect. The invention has the advantages of solving the water-stopping problem of the steel sheet pile, adopting the conventional material as the material for stopping the water and leakage, having low cost and simpler stirring and being capable of carrying out underwater leakage stop of the steel sheet pile fast and conveniently; the leak-stopping construction of the steel sheet pile is as follows: the difference of the internal and external water heads of the cofferdam and by the effect of absorption force of water flow, the coarse, the sawdust powder and the cement and the like are absorbed into the locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect.

The invention discloses a cast iron sluice gate which comprises a cast iron gate frame, a ventilation pipe, a cast iron gate leaf, a positioning device and water stopping copper frames, wherein a guiding groove is arranged in one side of the cast iron gate frame; the ventilation pipe is fixedly arranged on an air distribution chamber at the upper part of one side, which is opposite to the guiding groove, of the cast iron gate frame; the cast iron gate leaf is arranged in the guiding groove of the cast iron gate frame; the top of the cast iron gate leaf is of a U-shape; the U-shaped top is connected through a hanging shaft; the cast iron door leaf is arranged in the cast iron gate frame in a vertical sliding manner; and a positioning device is arranged outside the guiding groove of the cast iron gate frame. According to the cast iron sluice gate disclosed by the invention, the water stopping copper frames are arranged on the cast iron gate frame and the cast iron gate leaf, so that the defects that a traditional gate is easy to deform and is not tight in water sealing so as to leak water and the like can be effectively solved; and in addition, due to the adoption of the cast iron gate frame and the cast iron gate leaf, the corrosion and wear resistance is greatly improved and the service life of the valve is prolonged. According to the cast iron sluice gate disclosed by the invention, the cast iron gate leaf is arranged in the guiding groove of the cast iron gate frame for connecting in a vertical sliding manner, and thus the convenience and reliability in use are realized; and a slope type positioning device is also arranged on the cast iron gate frame, so that the cast iron gate frame is matched with the cast iron gate leaf to finish the pre-pressing and locking and achieve the effect of stopping water.

A composite earth pressure balance shield machine, comprising: a casing (1), a cutter head (2), a soil bin (3), a screw conveyor (4) and a propelling oil cylinder (6), characterized in that: the The cutter head is located at the front of the casing, and the cutter head is provided with a tearing knife (21) and a cutting knife (22) at the same time, and the blade of the cutting knife is slightly behind the tearing knife; the soil bin is located at the rear of the cutter head , and the back wall of the soil bin is provided with a grouting hole (32), an air pressure balance device (5) is installed at the rear of the soil bin, and an excavation port (31) is provided at the bottom of the soil bin; the lower entrance of the screw conveyor is connected to the soil bin. The excavation openings of the casings are connected; the propelling oil cylinders are evenly arranged along the inner wall of the casing. The shield machine can solve the normal excavation problem in the highly permeable gravel-sand soil layer or the egg (gravel) stone soil layer, or the normal excavation problem when it needs to pass through obstacles such as large stones over 30 cm.

The invention relates to a simple and fast water stop method of a Larssen steel sheet pile cofferdam. The method comprises the following steps: firstly, verticality of the steel sheet pile is guaranteed, a vibrating pile driver is used for carrying out inserting and driving to the steel sheet pile, and enough butter is arranged in a locking notch of the steel sheet pile in the process of insertingand driving so as to guarantee the quality of the locking notch; after water leakage is found in the water-pumping process, grading coarse, sawdust powder and cement are adopted for mixing and then aleak-stopping pipe is arranged at the outer side of the steel sheet pile above the water-leaking position; leak-stopping mixed material is placed downward to the position needing to stop leakage by the leak-stopping pipe; and the coarse, the sawdust powder and the cement and the like are absorbed into a locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect. The invention has the advantages of solving the water-stopping problem of the steel sheet pile, adopting the conventional material as the material for stopping the water and leakage, having low cost and simpler stirring and being capable of carrying out underwater leakage stop of the steel sheet pile fast and conveniently; the leak-stopping construction of the steel sheet pile is asfollows: the difference of the internal and external water heads of the cofferdam and by the effect of absorption force of water flow, the coarse, the sawdust powder and the cement and the like are absorbed into the locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect.

The invention relates to a method for preventing drop leakage, and a structure used by the method. The method for preventing drop leakage is as follows: a rod body provided with a plugging body is rotated to make a hole of the plugging body not correspond to a hole of a water-seal body, so as to achieve the functions of controlling water outlet and stopping water; and counterforce of the rod body is utilized to oppress the water-seal body on a water outlet to generate comprehensive absorption stress, so as to achieve the leakproof water-seal effect. The structure for preventing drop leakage comprises a container provided with the water outlet, the water-seal body arranged on the water outlet and provided with the hole, a rod body rotationally arranged below the container, and the plugging body arranged on the rod body corresponding to the water-seal body and provided with the hole.

The invention relates to a prestressed concrete corrugated sheet pile and a preparation method thereof, and belongs to the technical field of construction engineering. The prestressed concrete corrugated sheet pile solves the problems that an existing corrugated sheet pile is poor in soil blocking and water retaining effect and prone to damage at a corrugated sheet pile joint in the transportationprocess. The prestressed concrete corrugated sheet pile comprises a corrugated pile body, wherein a tenon is arranged on one side in the length direction of the corrugated pile body in a penetratingmode, and a first groove is formed in the other side of the corrugated pile body in a penetrating mode; the cross section of the tenon and the cross section of the first groove are both semicircular;the tenon can be embedded into the first groove and can rotate in the first groove; a second groove is formed in the concave surface of the first groove in the length direction of the corrugated pilebody in a penetrating mode; a first radius of the first groove is larger than a second radius of the second groove; and the second groove is used for filling with a water-meeting water-stopping adhesive. The invention further provides the preparation method of the prestressed concrete corrugated sheet pile. According to the prestressed concrete corrugated sheet pile, damage to the joint of the corrugated sheet pile in the transportation process is avoided, and the soil blocking and water retaining effects of the corrugated sheet pile are improved.

The invention discloses a sampling and water pumping device with a water stop structure for hydrogeological drilling and a method, relates to the technical field of hydrogeological equipment, and aims to solve the technical problems that the sampling and water pumping device is inconvenient to set the distance from the bottom to an upper water layer to sample different water layers and sample different positions one by one, the operation is troublesome, and the sampling time is long. The lower end of an upper connecting flange is provided with an extraction balance weight component, the lower end of the extraction balance weight component is provided with three water pumping and sampling components, the number of the water pumping and sampling components is three, the lower end of the middle of a connecting conduction piece is provided with a height adjusting assembly in a threaded mode, and the upper end of the height adjusting assembly is in threaded connection with the inner side of an extraction connecting assembly; the water pumping and sampling assembly is arranged at the lower end of the extending and folding assembly, the height can be limited, the water pumping and sampling assembly serves as a balance weight, the water bottom can be sampled, three points underwater can be sampled at the same time, and one-time operation is simple and convenient.

The composite balanced tunnel shield machine includes machine shell, capstan in the front of the machine shell, earth bin on the back of the capstan, screw conveyer for conveying cut earth and driving oil cylinders distributed homogeneously around the machine shell. It features the capstan with both tearing tools and cutting tools; the earth bin with several slurry injecting holes in the back wall; and pneumatic balancer installed in the back part of the earth bin. The screw conveyer is provided with two gates including the first hydraulic gate and the second manual gate; and 26 driving oil cylinders are distributed homogeneously around the machine shell. There are in the shield machine tail three tail sealing steel wire brushes with tail grease in between and the last brush capable of being replaced. Or, the shield machine tail may be water stopping sealed with polyurethane or other material and the last brush may replaced with type-Y sealing rubber brush for stopping water.

The invention discloses a perpendicular jack system for a temporary support of a twin-pore immersed tube tunnel with three tube corridors. The perpendicular jack system comprises a perpendicular jack. An upper embedded part of the perpendicular jack is welded at the upper end of the perpendicular jack, a push rod of the perpendicular jack is welded at the lower end of the perpendicular jack, and the perpendicular jack is respectively fastened with the upper embedded part and the push rod, which are arranged at the two ends of the perpendicular jack, by bolts; the lower portion of the push rod penetrates a lower embedded part of the perpendicular jack, a compression sleeve is arranged between the push rod and an upper port of the lower embedded part, the lower embedded part is connected with the compression sleeve in a threaded manner, sealing packing is arranged below the compression sleeve, and an O-shaped rubber sealing ring is arranged between the push rod and a lower port of the lower embedded part; a grouting tube is arranged on the lower embedded part. The perpendicular jack system has the advantages that a three-point support mode is adopted, in other word, nose supports are arranged at the front end of a tube section, the perpendicular jack is arranged at the tail end of the tube section, the tail section of the tube section is arranged in partition walls of two side tube corridors in a supported manner, a transverse distance is long, accordingly, longitudinal and transverse structures of the integral tube section are stressed reasonably, the tube section is good in integral stability in tube section pull-in procedures, and the quantity of structure reinforcing steel bars can be correspondingly reduced.

The invention provides a river-adjacent-foundation-pit island-building cofferdam clay sealing construction method, and belongs to the technical field of river deep-foundation-pit project sealing. The river-adjacent-foundation-pit island-building cofferdam clay sealing construction method includes the steps of island building cofferdam construction, wherein a cofferdam is constructed outside a preset position of a foundation pit; clay sealing wall construction, wherein a clay sealing wall is constructed between a preset position of the foundation pit and the cofferdam; foundation pit excavation, wherein excavation is carried out at a preset position of the foundation pit to obtain the foundation pit; inner formwork supporting box hoisting, wherein a prefabricated inner formwork supporting box is hoisted to a preset position in the foundation pit, positioned and reinforced; bearing platform construction, wherein the foundation pit is subjected to pouring to obtain a bearing platform; and inner formwork supporting box disassembling, cofferdam disassembling and river cleaning. According to the construction method, as the clay sealing wall is arranged, the physical characteristics of high sealing performance and plasticity of clay are used, the sealing requirement of the river-adjacent bearing platform foundation pit is met, and the sealing effect of the foundation pit is achieved; and as the inner formwork supporting box is hoisted, it is guaranteed that construction of the deep foundation pit is safe and stable, and meanwhile the inner formwork supporting box can serve as a bearing platform formwork.

The invention discloses a water stopping structure of a water outlet pipe of a water pump. The water stopping structure of the water outlet pipe of the water pump comprises a wall, the water outlet pipe penetrating through the wall, and a water stopping ring which is embedded in the wall and welded on the outer wall of the water outlet pipe. An annular L-shaped water stopping belt is arranged on the connecting portion of the water outlet pipe and the outer side of the wall body, a circular ring of the water stopping belt is arranged on the outer wall of the water outlet pipe in a sleeved mode, at the two ends of an L shape of the water stopping belt, one end of the L-shaped water stopping belt is fixed on the wall, and the other end of the L-shaped water stopping belt is fixed on the outer wall of the water outlet pipe. The water stopping structure of the water outlet pipe of the water pump overcomes the defects that water leakage can happen easily in a traditional water stopping structure, and maintaining and repairing are not easy. In the practical application process, due to the effect of outer water pressure, stopping water is made to be in a squeezing state, so that the water stopping effect is achieved effectively, even though the wall and the water outlet pipe are deformed and dislocated seriously, the strong tensile deformation capacity of the water stopping belt can meet the application requirement, and later repairing and replacing are simpler, more convenient and easier to implement compared with a traditional mode.

The invention discloses an assembly-type tunnel joint form and relates to the technical field of traffic and transportation. A joint steel lantern ring is arranged on the outer wall of a tunnel structure inserting end. A first sealing rubber ring and a second sealing rubber ring are arranged on the outer wall of a tunnel structure bell end. An elastic sealing gasket is arranged on the end face of the tunnel structure inserting end. A steel ring is arranged on the outer wall of an end opening of the tunnel structure bell end. An injection pipe is arranged in the tunnel structure inserting end. A shear resistant plug pin and a plug pin hole are arranged at the tunnel structure inserting end and the tunnel structure bell end. The tunnel structure inserting end and the tunnel structure bell end are connected in an inserting mode through the shear resistant plug pin and the plug pin hole. The assembly-type tunnel joint form is small in joint manufacturing difficulty, convenient to mount, fast, low in cost, good in waterproof effect, safe and reliable. A joint structure has certain rigidity, so that in a complex stratum, the influence of uneven settlement on a tunnel can be resisted.

The invention relates to the technical field of municipal facilities, in particular to a convenient-to-repair constituent part of a municipal tap water pipeline joint. The convenient-to-repair constituent part comprises two mounting pipes, a water-stop mechanism, a connecting mechanism and a fixing mechanism. The water-stop mechanism is fixedly arranged on the two mounting pipes to stop water whena pipeline is repaired, and the water-stop mechanism comprises two sealing shells, two valves and two groups of lifting assemblies; the connecting mechanism is arranged between the two mounting pipesto connect the two mounting pipes, and the connecting mechanism comprises a connecting pipe and a plurality of groups of inserting assemblies; and the fixing mechanism is arranged on the outer wallsof the connecting pipe and the two mounting pipes in a sleeving mode to fix the connecting pipe and the two mounting pipes, and the fixing mechanism comprises two groups of closing and compacting assemblies and two groups of positioning assemblies. According to the convenient-to-repair constituent part of the municipal tap water pipeline joint and a using method, a water valve main switch does notneed to be closed when a broken or blocked tap water pipeline is repaired, water resource waste is avoided, meanwhile, the joint is convenient to rapidly install and replace, and the sealing effect of the joint is good.

The invention discloses a construction method for underground excavation station bottom part water-stopping. The construction method for underground excavation station bottom part water-stopping comprises the steps that construction preparation is conducted, pilot holes are constructed, chambering is conducted, mixing is conducted, a rotary jet grouting mixing pile is formed, a next rotary jet grouting mixing pile is constructed to be mutually occlusive to a pile body side part of the previous rotary jet grouting mixing pile, and a water-stop curtain is formed. An immersed tube method or a slurry wall protection method can be adopted in the construction of the pilot holes. The rotary jet grouting mixing pile at the previous pile position and the pilot hole at the next pile position can beconstructed simultaneously. According to the construction method for the underground excavation station bottom part water-stopping, the precipitation technology of a precipitation well is completely abandoned, groundwater resources are effectively protected, the problem of the station bottom part water-stopping in water-rich stratum is solved, at the same time, the construction method is simple and flexible, the construction period is short, the stratum is widely applicable, maneuverability is high, bearing capacity and anti-floating ability are extremely high, the construction impact is small, the underground environment is not harmed, and the construction method for underground excavation station bottom part water-stopping is of great engineering practical value for large-area and low-clearance underground excavation station construction with high underground water level.

The invention provides a construction method of an underground diaphragm wall. The construction method comprises the steps of conducting groove milling treatment on a first preset groove milling area of the underground diaphragm wall; conducting pouring construction operation of the first underground wall in a first notch, wherein the concrete thickness of the end, at least facing a second underground wall, of the first underground wall is larger than the thickness of a preset protection layer, and the concrete layer of the exceeding part serves as a meshing protection layer; and adopting double-wheel milling equipment for conducting groove milling treatment on a second preset groove milling area, and adopting the double-wheel milling equipment for conducting groove milling treatment on the meshing protection layer in the wall construction step, so that a first meshing body is formed on the end face of the meshing protection layer. According to the construction method of the underground diaphragm wall provided by the invention, the adjacent underground wall bodies are meshed and overlapped, so that connection between the underground wall bodies is achieved to form the underground diaphragm wall, the water stopping effect can be achieved on the basis that the structure of a connector of the underground diaphragm wall is not changed, construction of water stopping structures such as water stopping pieces is avoided, operation is convenient, safety and reliability are achieved, the working efficiency is improved, and the engineering cost is also saved.

The invention relates to a construction process of a concrete form water-stopping occlusion pile. The construction process comprises the following steps: constructing a plain concrete pile, and using a special occlusion form to form cambered grooves; and constructing a reinforced concrete pile, wherein concrete automatically flows into the cambered grooves of the plain concrete pile at the moment, thereby realizing the occlusion of the plain concrete pile and the reinforced concrete pile to form a curtain so as to achieve the purposes of water stopping and water retaining. Compared with the prior art, the invention has the advantages that the construction cost is greatly saved, the construction cycle is shortened and the water retaining quality is improved because the reinforced concrete pile and the plain concrete pile are matched for use; based on the occlusion effect of the cambered surfaces of the concrete, good occlusion and water-stopping effects between new and old concrete surfaces are achieved, and the construction quality is easy to control; and in addition, the application range is wide, different drilling machines can be used for forming pores in different water-bearing strata, and the predetermined water-stopping effect can be achieved as long as the pore forming quality meets the requirements of the specification.

The invention discloses a tube sheet waterproof sealing gasket which solves the technical problems that mud water cannot be comprehensively prevented from leaking from the contact surfaces of a sealing gasket and a sealing gasket and the contact surfaces of one sealing gasket and a sealing groove and effective squeezing force is difficult to continuously provide. The sealing gasket comprises a sealing gasket body arranged in a tube sheet sealing groove, an upper water-swellable pad is arranged on the upper end face of the sealing gasket body, a lower water-swellable pad is arranged on the lower end face of the sealing gasket body, and the sealing gasket body, the upper water-swellable pad and the lower water-swellable pad form a tertiary water stop structure. Both the upper end face and the lower end face of the sealing gasket body are embedded with the water-swellable pads, and when water leakage occurs at a tube sheet joint at the later stage, the swelling performance of the water-swellable pads is stimulated under the action of water, so that the squeezing force between the sealing gaskets is improved, and second and even third water stopping effects are achieved.

The invention relates to a prestressed concrete corrugated sheet pile and a preparation method thereof, belonging to the technical field of construction engineering, and solves the problems that the existing corrugated sheet pile has poor soil and water retaining effect and the interface of the corrugated sheet pile is easily damaged during transportation. The prestressed concrete corrugated sheet pile includes a corrugated pile body, one side along the length direction of the corrugated pile body is provided with a tenon, and the other side is provided with a first groove; the cross sections of the tenon and the first groove are both semicircular The tenon can be embedded in the first groove and can rotate in the first groove; the concave surface of the first groove is provided with a second groove along the length direction of the corrugated pile body; the first groove has a first radius greater than the second The groove has a second radius; the second groove is used for filling the water-swellable waterproof glue. Also provided is a preparation method of the prestressed concrete corrugated sheet pile. The invention avoids damage to the interface of the corrugated sheet pile during transportation, and improves the effect of retaining soil and water of the corrugated sheet pile.

The invention discloses a segment waterproof sealing gasket, which solves the technical problems that muddy water cannot be completely prevented from leaking from the contact surface of the sealing gasket and the sealing gasket, or the contact surface of the sealing gasket and the sealing groove, and that it is difficult to continuously provide effective extrusion force. The invention includes a gasket body arranged in the sealing groove of the segment, the upper end surface of the gasket body is provided with an upper water-swellable pad, the lower end surface is provided with a lower water-swellable pad, the gasket body, the upper water-swellable pad And the water-swellable cushion below constitutes a three-time water-stop structure. In the present invention, the water-swellable pad is embedded in the upper end surface and the lower end surface of the gasket body, and when water leaks at the joints of the segments in the later stage, the water-swellable pad activates the swelling performance under the action of water, which improves the sealing gasket. The squeezing force between them achieves the second or even third water-stopping effect.

The present invention relates to the technical field of municipal facilities, in particular to a municipal tap water pipe joint that is easy to repair and its use method, which includes two installation pipes, and also includes a water stop mechanism, a connecting mechanism and a fixing mechanism, and the water stop mechanism is fixed on two On the two installation pipes to stop the water when repairing the pipes, the water stop mechanism includes two sealing shells, two valves and two sets of lifting components, the connecting mechanism is set between the two installation pipes to connect the two installation pipes, the connection The mechanism includes a connecting pipe and several sets of inserting components. The fixing mechanism is sleeved on the outer walls of the connecting pipe and the two installation pipes to fix them. The fixing mechanism includes two sets of fastening components and two sets of positioning components. One of the present invention The easy-to-repair municipal tap water pipe joint and its usage method can repair old or blocked tap water pipes without closing the main switch of the water valve, avoiding waste of water resources, and at the same time, it is convenient for quick installation and replacement of the joint, and the joint sealing effect is good.