Fabricated repair structure and repair construction method of pipe network circular well chamber inspection well

Abstract

The invention provides an assembly type repairing structure of a pipe network circular well chamber inspection well and a repairing construction method. The repairing structure comprises an assembly type well chamber, a vertical shaft and a first pipe sleeve. The assembled well chamber comprises a base, a plurality of groups of first arc-shaped splicing blocks and at least one group of second arc-shaped splicing blocks, the plurality of arc-shaped splicing blocks are detachably and hermetically spliced into a cylindrical well chamber main body with openings at two ends, and the base is detachably and hermetically plugged at the bottom opening of the cylindrical well chamber main body; the second arc-shaped splicing block comprises a second arc-shaped splicing block body, a through hole or a semi-through hole is formed in the side wall of the second arc-shaped splicing block body, and the adjacent semi-through holes can be combined into a mounting hole with a preset diameter; one end of the first pipe sleeve is hermetically connected with the mounting hole / through hole, and the other end is hermetically connected with a drain pipe; the bottom opening of the vertical shaft is detachably and hermetically connected with the top opening of the cylindrical well chamber main body; according to the method, the brick well in the circular well chamber can be conveniently and rapidly repaired under the condition that excavation is not carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection well repair, and in particular to an assembled repair structure and a repair construction method for a circular well chamber inspection well in a pipe network. Background Art

[0002] Inspection wells are used for rainwater and sewage discharge pipes. They are vertical shafts built at certain intervals at the underground pipeline location. They are used to connect pipelines of different diameters, directions, and heights. They are mainly used by maintenance workers to regularly inspect and dredge pipelines, remove sludge and foreign matter, and prevent pipeline blockages. They are one of the underground infrastructures of urban roads.

[0003] Existing inspection wells are mostly brick-built, with poor quality stability and low brickwork strength, which are prone to structural damage, sewage leakage, and injuries from manhole covers. During repairs, due to the limitation of the wellhead size (diameter 700mm), when the size of the prefabricated well chamber is larger than the wellhead size, the conventional prefabricated well chamber cannot be lowered into the brick-built inspection well through the narrow wellhead, which brings challenges to trenchless repairs. Traditionally, in this case, large-scale excavation can only be carried out for repairs, which is time-consuming, costly, and brings many inconveniences to traffic.

[0004] Therefore, there is an urgent need for an assembled repair structure and repair construction method for a circular well chamber inspection well in a pipe network, which can realize convenient and rapid repair of the circular well chamber brick well without excavation. Summary of the Invention

[0005] The purpose of the present invention is to provide an assembled repair structure and repair construction method for a circular well chamber inspection well in a pipe network, aiming to solve the technical problems of long repair cycle and high cost of traditional excavation repair.

[0006] To achieve the above objectives, in a first aspect, the present invention provides an assembled repair structure for a circular manhole in a pipe network, comprising a vertically arranged assembled manhole, a vertical shaft detachably connected to the assembled manhole, and a first pipe sleeve; The assembled well chamber includes a base, a plurality of pairs of first arc-shaped blocks, and at least one pair of second arc-shaped blocks. The plurality of arc-shaped blocks are detachably and sealably assembled into a cylindrical well chamber body with openings at both ends. The base is detachably and sealably blocked at the bottom opening of the cylindrical well chamber body. The second arc-shaped block includes a second arc-shaped block body, and a through hole or a semi-through hole is opened on the side wall of the second arc-shaped block body, and adjacent semi-through holes can be combined into a mounting hole with a preset diameter; One end of the first pipe sleeve is sealed and connected to the mounting hole / the through hole, and the other end is used for sealing and connecting to the corresponding drain pipe; The vertical wellbore is a cylindrical body with openings at both ends, and the bottom opening thereof is detachably and sealedly connected to the top opening of the cylindrical well chamber body.

[0007] As a further improvement to the above solution, a first sealing connection portion extends from the bottom end of each arc-shaped block, and a first groove is formed on the inner wall of the first sealing connection portion; Each first groove is sealed and connected to form a first sealing groove when the cylindrical well chamber body is spliced ​​together; an expandable sealing member is provided in the first sealing groove for achieving a sealed connection with the base.

[0008] As a further improvement to the above solution, if the vertical wellbore and the prefabricated well chamber are coaxially arranged, and the diameter ratio between the two is greater than or equal to a preset value; A second sealing connection portion extends from the top of each arc-shaped block, and a second groove is formed on the inner wall of the second sealing connection portion; Each second groove is sealed and connected to form a second sealing groove when the cylindrical well chamber body is spliced ​​together; an expandable sealing member is provided in the second sealing groove for achieving a sealed connection with the vertical wellbore.

[0009] As a further improvement to the above solution, if the axes of the vertical wellbore and the prefabricated well chamber are parallel and eccentrically arranged, and the diameter ratio between the two is less than a preset value; The bottom end of the vertical wellbore and the top end of the assembled well chamber are sealed and detachably connected via a spliced ​​cover plate.

[0010] As a further improvement of the above solution, the spliced ​​cover plate comprises at least a first cover plate splice and a second cover plate splice arranged in opposite directions; The first cover plate assembly and the second cover plate assembly are spliced ​​into a shape that is adapted to the top opening of the assembled well chamber through a detachable seal; At least one cover plate assembly is provided with a mounting structure adapted to be installed and plugged into the bottom end of the vertical shaft.

[0011] As a further improvement of the above solution, the first arc-shaped block includes a first arc-shaped block body and connecting plates respectively provided on both sides of the first arc-shaped block body, and the connecting plates are also respectively provided on both sides of the second arc-shaped block body; Each of the connecting plates extends toward the center of the cylindrical well body; Each connecting plate is provided with a plurality of connecting holes spaced apart along its height direction; Adjacent first arc-shaped blocks, adjacent second arc-shaped blocks, and first arc-shaped blocks and second arc-shaped blocks are detachably bolted together into one piece through corresponding connecting holes.

[0012] As a further improvement to the above solution, expansion seals are provided at the joints of the arc-shaped blocks to achieve detachable and sealed splicing of the multiple arc-shaped blocks.

[0013] As a further improvement of the above solution, both sides of each arc-shaped block are provided with grooves, and the grooves extend along the height direction thereof; and the expansion seal is arranged in the grooves.

[0014] As a further improvement of the above solution, each arc-shaped puzzle piece further includes an arc edge arranged at the bottom of the corresponding arc-shaped puzzle piece body; The base is detachably sealed at the bottom of the cylindrical well chamber body through a compressor; one end of the compressor is connected to the base, and the other end can be adjusted to compress the arc edge to achieve detachable sealing with the cylindrical well chamber body.

[0015] As a further improvement to the above solution, if the original brick inspection well is further provided with a drainage branch pipe along the height direction of the well shaft, the vertical well shaft is divided into at least two sections, and an open clamp is provided at the corresponding drainage branch pipe, and the vertical well shaft sections stacked up and down are connected into one piece by the open clamp; The open clamp includes a clamp body that is split into two parts and has two openings arranged along the axial direction and at least one side opening arranged along the radial direction. A second pipe sleeve is provided at the side opening for connecting a drainage branch pipe.

[0016] As a further improvement of the above solution, the first pipe sleeve and the second pipe sleeve are both made of stainless steel.

[0017] As a further improvement to the above solution, one end of each pipe sleeve is arranged at the corresponding opening through a sealing ring; The outer wall of the other end is also provided with a sealing structure for detachably sealingly connecting with the corresponding drain pipe / drain branch pipe; Specifically, the sealing structure includes a third sealing groove provided on the outer wall of the other end of the sleeve, and a third sealing ring provided in the third sealing groove; preferably, the third sealing ring is a toothed sealing ring.

[0018] As a further improvement of the above solution, each arc-shaped block, cover plate block and vertical shaft are cast by ductile iron.

[0019] In a second aspect, the present invention further provides a repair construction method for an assembled repair structure of a circular manhole inspection well in a pipe network as described in the first aspect, the steps comprising: S1. First, hoist the base to the bottom of the well and level and support it; then hoist each arc-shaped block and the first pipe sleeve to the bottom of the well; seal and splice the arc-shaped blocks according to the layout of the drainage pipe to form a cylindrical well chamber body with open ends, and detachably fasten the bottom end of the cylindrical well chamber body to the base; Then, a U-shaped sealing ring is clamped at the mounting hole / through hole on the side wall of the cylindrical well body, and the first pipe sleeve is passed through the corresponding mounting hole / through hole and sealed and inserted into the corresponding drainage pipe; S2. If the vertical wellbore and the assembled well chamber are coaxially arranged, hoist the vertical wellbore to the desired position, and seal and insert the bottom end of the vertical wellbore into the top opening of the cylindrical well chamber body; If the axes of the vertical shaft and the prefabricated well chamber are parallel and eccentrically arranged, first hoist the various cover plate segments to the desired position, seal and splice the cover plate segments, and place the sealing cover on the top opening of the prefabricated well chamber; hoist the vertical shaft to the desired position, and seal and plug the bottom end of the vertical shaft into the mounting structure on the spliced ​​cover plate; S3. Carry out water flow test and water pressure test on the installed repair structure; after passing the test, use foam concrete to backfill the area around the inspection well to complete the repair construction.

[0020] As a further improvement of the above scheme, in step S1, if the diameter of the first pipe sleeve is larger than the size of the original brick-built inspection well mouth, the first pipe sleeve is first cut open and rolled to a diameter smaller than the well mouth size, and then hoisted to the bottom of the well and expanded to a preset diameter through a spreading tool and welded into shape; then one end of the welded first pipe sleeve is inserted into the open end of the mounting hole / through hole, and the other end is sealed and plugged into the corresponding drainage pipe.

[0021] As a further improvement of the above scheme, if the original brick-built inspection well is also provided with a drainage branch pipe along the height direction of its wellbore, in step S2, the vertical wellbore is divided into at least two sections, and an open clamp is provided at the corresponding drainage branch pipe; the vertical wellbore sections stacked up and down are connected into one by the open clamp; and the second pipe sleeve on the open clamp is connected to the corresponding drainage branch pipe.

[0022] As a further improvement of the above solution, before step S1, the following steps are further included: S01. Clean the damaged brick inspection well and measure the dimensions of the original brick inspection well, as well as the diameters of the drainage pipes and / or drainage branches connected to the original brick inspection well; S02. Dividing the well chamber into a plurality of pairs of first arc-shaped blocks and at least one pair of second arc-shaped blocks according to the measured dimensions; If the shaft and chamber axes of the original brickwork shaft are parallel and eccentrically arranged, the portion used to connect the shaft and chamber is divided into a first cover plate assembly and / or a second cover plate assembly; According to the location of the drainage branch pipe, the vertical shaft is set into the corresponding number of sections; Each arc block, cover plate block, and vertical shaft are cast by ductile iron.

[0023] Since the present invention adopts the above technical solution, the beneficial effects of this application are: The present invention provides an assembled repair structure for a circular manhole inspection well in a pipe network. Traditional brick-built manhole repairs usually require the entire original manhole to be demolished and excavated to the foundation layer, which not only generates a large amount of construction waste but also has a long-term impact on surrounding roads, underground pipelines and traffic. The present invention adopts a fully assembled structure. Through the detachable and sealed connection of the base, arc-shaped blocks and vertical manhole of the assembled manhole, the assembly of the repair structure can be completed directly at the original manhole position, minimizing the disturbance to the surrounding environment and complying with the concept of green construction. At the same time, the assembled manhole is composed of arc-shaped blocks and can be flexibly adjusted according to the size of the original manhole. The number of splicing blocks can be quickly enclosed to form a cylindrical well chamber body, which is especially suitable for situations where the well chamber diameter is larger than the wellbore wellhead diameter. Through the block assembly mode, the arc-shaped blocks can be lowered to the well bottom through the narrow original wellhead for assembly, thereby effectively realizing non-excavation repair; the base serves as a bottom blocking piece and is detachably sealed to the bottom opening of the cylindrical well chamber body, further simplifying the basic positioning steps; the main structure can be completed by sealing and splicing each component. Compared with the traditional cast-in-place or overall replacement process, the construction process is greatly reduced, thereby effectively shortening the construction period and greatly improving the repair efficiency; The "through hole or semi-through hole" structure provided on the side wall of the second arc-shaped block body of the present invention forms a mounting hole of a preset diameter by combining the semi-through holes of adjacent blocks. Specifically, the mounting hole can be opened on-site according to the specific location of the drainage pipe at the construction site, or opened on the ground by measuring the location and diameter of the drainage pipe in advance. In order to achieve quick and convenient on-site installation of the drainage pipe, a first pipe sleeve is provided in the mounting hole / the through hole. The provision of the first pipe sleeve enables quick and convenient connection with the drainage pipe on site, thereby achieving the purpose of quick repair. The vertical shaft is a cylindrical body with two open ends, and its bottom is detachably sealed to the top of the cylindrical well chamber body, so that the repair structure can be assembled in sections as needed. When the well is deep, the height can be adjusted by stacking multiple vertical shaft sections. When local maintenance is required later, only the corresponding section of the shaft needs to be disassembled to expose the repair area, without the need to re-excavate the entire well chamber. This "modular stacking + disassembly" feature significantly improves the flexibility and maintainability of the repair structure, reducing the maintenance cost throughout the entire life cycle. In addition, all components of the present invention (base, curved blocks, vertical shaft, first pipe sleeve) are assembled through a sealed connection, effectively avoiding leakage problems caused by improper joint treatment in traditional repairs. In certain preferred embodiments, each joint is provided with an expansion seal, which expands with rainwater to achieve a reliable seal, ensuring that the connection between the well chamber and the drainage network after repair is leak-free, meeting the operational requirements of urban pipe networks such as rainwater and sewage diversion and sewage collection. In summary, the present invention completely solves the pain point of traditional brick well repair requiring excavation through the organic combination of prefabricated structural design and modular components, and has formed significant advantages in convenience, efficiency, economy and long-term reliability, providing a reliable technology for the rapid repair of pipeline well chambers under non-excavation conditions; and in the subsequent maintenance process, due to the detachable connection of each component, it is only necessary to replace new blocks or components in situ and then reseal and assemble, which minimizes the amount of earth excavation, shortens the construction period, and reduces the impact on the surrounding environment and traffic. Therefore, the repair structure provided by the present invention can also reduce subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other drawings can be obtained based on the structures shown in these drawings, and they all fall within the scope of protection of the present invention.

[0025] Figure 1 This is a three-dimensional schematic diagram of an assembled repair structure (single vertical shaft) for a circular manhole inspection well in a pipe network disclosed in Example 1 of the present invention; Figure 2 This is a schematic front view of an assembled repair structure (two vertical shafts) for a circular manhole inspection well in a pipe network disclosed in Example 1 of the present invention; Figure 3 yes Figure 2 CC cross-sectional view; Figure 4 This is a schematic front view of an assembled repair structure (two vertical shafts) for a circular manhole inspection well in a pipe network disclosed in Example 1 of the present invention; Figure 5 yes Figure 4 BB-direction cross-sectional diagram; Figure 6 is a schematic top view of the first arc-shaped puzzle block disclosed in Example 1 of the present invention; Figure 7 yes Figure 6 D-direction schematic diagram; Figure 8 This is a partial enlarged schematic diagram of the connection between the pipe sleeve and the second arc-shaped puzzle block disclosed in Example 1 of the present invention; Figure 9 This is a schematic diagram of a partial method for connecting a pipe sleeve and a drain pipe / drain branch pipe disclosed in Example 1 of the present invention; Figure 10 This is a three-dimensional schematic diagram of the first pipe sleeve after welding and forming disclosed in Example 1 of the present invention; Figure 11 It is a schematic main view of an assembled repair structure for a circular well chamber inspection shaft in a pipe network disclosed in Example 2 of the present invention.

[0026] Reference numerals: 1. Assembled well chamber; 11. Base; 12. First arc-shaped block; 121. First arc-shaped block body; 122. Connecting plate; 123. Connecting hole; 13. Second arc-shaped block; 131. Second arc-shaped block body; 132. Mounting hole; 14. Cylindrical well chamber body; 141. First sealing groove; 142. Second sealing groove; 15. Expansion seal; 16. Arc edge; 2. Vertical wellbore; 3. First pipe sleeve; 4. Spliced ​​cover plate; 41. First cover plate block; 42. Second cover plate block; 43. Mounting structure; 5. Compressor; 6. Open clamp; 7. Second pipe sleeve; 8. Third sealing groove; 9. Third sealing ring; 10. Weld; 011. U-shaped sealing ring; 012. Drain pipe.

[0027] The realization of the objectives, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] Moreover, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides an assembled repair structure for a circular well chamber inspection well in a pipe network, comprising a vertically arranged assembled well chamber 1, a vertical well shaft 2 detachably and sealedly connected to the assembled well chamber 1, and a first pipe sleeve 3 for connecting a drainage pipe 012; wherein the assembled well chamber 1 is composed of a base 11, a plurality of first arc-shaped blocks 12 arranged in pairs, and at least one second arc-shaped block 13 arranged in pairs, each arc-shaped block being detachably and sealedly spliced ​​to form a cylindrical well chamber body 14 with two ends open, and the base 11 is detachable. The seal is blocked at the bottom opening of the cylindrical well chamber body 14; a through hole or a semi-through hole is opened on the side wall of the second arc-shaped block 13, and adjacent through holes or semi-through holes are combined to form a mounting hole 132 of a preset diameter. One end of the first pipe sleeve 3 is sealed with the mounting hole 132 / through hole, and the other end is used for sealing the docking drainage pipe 012; the vertical well shaft 2 is a cylinder with openings at both ends, and its bottom opening is connected to the top opening of the cylindrical well chamber body 14 in a detachable sealing manner; the following is a detailed description of the embodiments in combination with different application scenarios.

[0032] Example 1 This embodiment is applicable to scenarios where the prefabricated well chamber 1 and the vertical wellbore 2 are coaxially arranged, and the diameter ratio between the two (diameter of the vertical wellbore 2 / diameter of the prefabricated well chamber 1) is greater than or equal to a preset value (e.g., 0.8); For details, see Figures 1-10 The assembled well chamber 1 includes a base 11, a first arc-shaped block 12 and a second arc-shaped block 13: First arc piece 12: see Figure 6 and Figure 7 It includes a first arc-shaped block body 121, with connecting plates 122 provided on both sides of the body. The connecting plates 122 extend toward the center of the cylindrical well body 14 and are provided with a plurality of connecting holes 123 at intervals along the height direction. Adjacent first arc-shaped blocks 12 are bolted together by passing bolts through the corresponding connecting holes 123. The second arc-shaped block 13 has a similar structure to the first arc-shaped block 12. The connecting plates 122 and connecting holes 123 are also provided on both sides of the body, and the side walls of the body are provided with through holes or semi-through holes (specifically, the number of the second arc-shaped blocks 13 and whether to provide semi-through holes or through holes on the side walls of the body are determined according to the actual wellhead size and the diameter of the first pipe sleeve 3. If the corresponding diameter of the first pipe sleeve 3 is smaller than the arc length of the second arc-shaped block 13, see Figure 1 and Figure 3 , then only one through hole needs to be opened on it; otherwise, a semi-through hole needs to be opened on it, and the semi-through holes of adjacent second arc-shaped puzzle pieces 13 are combined to form a mounting hole 132); adjacent second arc-shaped puzzle pieces 13 are also bolted together through the connecting holes 123; Splicing seal: Grooves are provided along the height direction of both sides of each arcuate block, and expandable sealing members 15 (such as water-expandable rubber strips) are provided in the grooves. At the same time, a first sealing connection portion extends from the bottom end of each arcuate block, and a first groove is provided on the inner wall of the first sealing connection portion. When the arcuate blocks are spliced ​​into the cylindrical well chamber body 14, adjacent first grooves are sealed and butted together to form an annular first sealing groove 141. An expandable sealing member 15 (such as an expandable water stop ring) is provided in the first sealing groove 141 for sealing connection with the base 11. Preferably, the base 11 is detachably sealed at the bottom opening of the cylindrical well body 14 by a presser 5; specifically, one end of the presser 5 is fixedly connected to the base 11 (e.g., bolted), and the other end can be adjusted to press the arc edge 16 of the cylindrical well body 14 (the arc edge 16 is an annular protrusion extending outward from the bottom of the arc-shaped block), thereby achieving sealing between the base 11 and the well body through radial compression; Since the prefabricated well chamber 1 is coaxial with the vertical wellbore 2 and the diameter ratio is less than or equal to a preset value, the top opening of the cylindrical well chamber body 14 and the bottom opening of the vertical wellbore 2 can be directly sealed and docked. Specifically, a second sealing connection portion extends from the top of the prefabricated well chamber 1, and a second groove is provided on the inner wall of the second sealing connection portion. When the cylindrical well chamber bodies 14 are spliced ​​together, the second grooves are sealed and docked to form an annular second sealing groove 142, and an expandable sealing member 15 (such as an expandable sealing strip) is provided in the second sealing groove 142. The edge of the bottom opening of the vertical wellbore 2 is embedded in the second sealing groove 142, and a sealed connection with the prefabricated well chamber 1 is achieved through the extrusion and deformation of the expandable sealing member 15. After the through hole or semi-through hole of the second arc-shaped block 13 is combined to form the mounting hole 132, one end of the first pipe sleeve 3 is sealed and fixed to the through hole / mounting hole 132 via the U-shaped sealing ring 011, and the other end extends to the position of the drain pipe 012 and is sealed and docked with the drain pipe 012; The traditional brick well repair usually requires the entire demolition of the original well body and excavation to the foundation layer, which not only generates a large amount of construction waste, but also has a long-term impact on surrounding roads, underground pipelines and traffic. The present invention adopts a fully assembled structure. Through the detachable and sealed connection of the base 11, the arc-shaped blocks and the vertical shaft 2 of the assembled well chamber 1, the assembly of the repair structure can be completed directly at the original wellhead position, which minimizes the disturbance to the surrounding environment and conforms to the green construction concept. At the same time, the assembled well chamber 1 is composed of arc-shaped blocks, and the number of splicing blocks can be flexibly adjusted according to the size of the original well chamber, so that it can be quickly enclosed to form a The cylindrical well chamber body 14 is particularly suitable for situations where the well chamber diameter is larger than the wellbore wellhead diameter. Through the block assembly mode, the arc-shaped blocks can be lowered to the bottom of the well through the narrow original wellhead for assembly, thereby effectively realizing non-excavation repair; the base 11 serves as a bottom sealing member and is detachably sealed to the bottom opening of the cylindrical well chamber body 14, further simplifying the basic positioning steps; the main structure can be built by sealing and splicing each component. Compared with the traditional cast-in-place or overall replacement process, the construction process is greatly reduced, which can effectively shorten the construction period and greatly improve the repair efficiency.

[0033] The "through hole or semi-through hole" structure opened on the side wall of the second arc-shaped block body 131 of the present invention forms a mounting hole 132 of a preset diameter by combining the semi-through holes of adjacent blocks. Specifically, the mounting hole 132 can be opened on-site according to the specific position of the drainage pipe 012 at the construction site, or opened on the ground by measuring the position and diameter of the drainage pipe 012 in advance; in order to achieve fast and convenient on-site installation with the drainage pipe 012, a first pipe sleeve 3 is provided in the mounting hole 132 / the through hole. The provision of the first pipe sleeve 3 can achieve a quick and convenient connection with the drainage pipe 012 on site, thereby achieving the purpose of quick repair.

[0034] In addition, all components of the present invention (base 11, arc-shaped blocks, vertical wellbore 2, first pipe sleeve 3) are assembled through a sealed connection method, which effectively avoids the leakage problem caused by improper joint treatment in traditional repairs; and in some preferred embodiments, each joint is provided with an expansion seal 15, and the expansion seal 15 expands in rainwater to achieve reliable sealing, ensuring that there is no leakage at the connection between the well chamber and the drainage pipe 012 network after repair, meeting the operational requirements of urban pipe networks such as rainwater and sewage diversion and sewage collection.

[0035] The present invention completely solves the pain point of traditional brick well repair requiring excavation through the organic combination of prefabricated structural design and modular components, and has formed significant advantages in convenience, efficiency, economy and long-term reliability, providing a reliable technology for the rapid repair of pipeline well chambers under non-excavation conditions; and in the subsequent maintenance process, due to the detachable connection of each component, it is only necessary to replace new blocks or components in situ and then reseal and assemble, which minimizes the amount of earth excavation, shortens the construction period, and reduces the impact on the surrounding environment and traffic. Therefore, the repair structure provided by the present invention can also reduce subsequent maintenance costs.

[0036] As a preferred embodiment, when a drainage branch pipe is provided in the height direction of the original brick inspection well, the vertical well 2 is divided into at least two sections in the height direction (see Figure 2 、 Figure 4 and Figure 5 ), each section of the wellbore is detachably connected at the position corresponding to the drainage branch pipe through an open clamp 6; wherein, the open clamp 6 integrates the connection interface of the drainage branch pipe, taking into account the segmented fixation of the wellbore and the connection function of the branch pipe; Specifically, the hoop body of the open hoop 6 adopts a split design (i.e., two semi-annular bodies are connected by bolts or pins to form a complete ring) to adapt to the cylindrical outer wall of the vertical wellbore 2; the hoop body is provided with two openings in the axial direction (vertical direction) to facilitate the axial insertion of the segmented wellbore section into the hoop body; The clamp body is radially provided with at least one side opening (preferably corresponding to the position of the drainage branch pipe), to which a second pipe sleeve 7 is fixedly connected; the second pipe sleeve 7 is a hollow tubular structure, the inner wall of which is detachably connected to the outer wall of the drainage branch pipe via a sealing structure; When the upper wellbore section and the lower wellbore section after segmentation are connected, the ends of the two wellbore sections are simultaneously inserted into the upper opening and lower opening of the clamp body. By tightening the connecting parts of the split body, the clamp body is radially contracted and tightly fits the outer wall of the wellbore, thereby realizing a fixed connection between the wellbore sections; at the same time, the second pipe sleeve 7 is connected to the drainage branch pipe to complete the drainage path connection of the branch pipe.

[0037] As a preferred embodiment, in order to ensure the sealing reliability between the pipe sleeve and the well body and the drainage branch pipe, the first pipe sleeve 3 and the second pipe sleeve 7 are both made of stainless steel. Its acid and alkali corrosion resistance can adapt to the humid and corrosive environment in the sewage well and extend its service life; See also Figure 8 and Figure 9 One end of each pipe sleeve is set at the corresponding opening through a U-shaped sealing ring 011, and the outer wall of the other end is also provided with a sealing structure for detachable and sealed connection with the corresponding drain pipe 012 / drainage branch pipe; The sealing structure includes a third sealing groove 8 provided on the outer wall of the other end of the pipe sleeve, and a third sealing ring 9 provided in the third sealing groove 8; preferably, the third sealing ring 9 is preferably a toothed sealing ring, which can achieve effective sealing with the corresponding drainage pipe 012 / drainage branch pipe to prevent leakage; The outer circumference of the toothed sealing ring is provided with a plurality of raised teeth. When the toothed sealing ring contacts the inner wall of the drain pipe 012 / drainage branch pipe, the toothed sealing ring can increase the friction force through the bite effect of the teeth, and at the same time fill the small gap between the pipe sleeve and the drain pipe 012 / drainage branch pipe, thereby preventing leakage caused by pipe deformation or vibration. Compared with ordinary O-rings, the toothed sealing ring has a more uniform sealing pressure distribution and stronger axial tensile resistance, and is suitable for dynamic sealing scenarios with non-rigid connections. Specifically, one end of the first pipe sleeve 3 is arranged at the through hole / the mounting hole 132 on the second arc-shaped block body 131 through the U-shaped sealing ring 011; the other end is sealed and connected to the corresponding drain pipe 012 through the sealing structure; One end of the second pipe sleeve 7 is arranged at the corresponding clamp side opening through a U-shaped sealing ring 011, and the other end is sealed and connected to the corresponding drainage branch pipe through the sealing structure to prevent sewage from leaking from the gap of the pipe sleeve.

[0038] As a preferred embodiment, the arc-shaped blocks, cover blocks and the vertical shaft 2 body are all cast using ductile iron; ductile iron has high strength, good toughness and excellent corrosion resistance (which can be further improved by surface epoxy resin coating or hot-dip galvanizing treatment), and is suitable for the humid and heavy-loaded environment of the inspection well. Compared with traditional brick structures, it can effectively avoid problems such as shaft cracking and leakage.

[0039] Example 2 See also Figure 11 This embodiment is applicable to scenarios where the vertical wellbore 2 and the prefabricated well chamber 1 are parallel but not coaxial (eccentricity ≤ preset value), and the diameter ratio between the two (vertical wellbore 2 diameter / prefabricated well chamber 1 diameter) is less than a preset value (e.g., 0.8); The structure of the assembled well chamber 1 of this embodiment is basically the same as that of embodiment 1, including a base 11, a first arc-shaped block 12 and a second arc-shaped block 13. The splicing method of each arc-shaped block (bolting of the connecting plate 122 and sealing of the expansion seal 15 in the groove) and the fixing method of the clamp 5 of the base 11 are the same as those of embodiment 1.

[0040] Since the vertical shaft 2 and the assembled well chamber 1 are parallel and eccentric to each other, they cannot be directly connected by sealing at the top edge. Therefore, in this embodiment, a spliced ​​cover plate 4 is used to achieve a sealed connection between the two. Specifically, the spliced ​​cover plate 4 comprises at least a first cover plate block 41 and a second cover plate block 42 which are arranged in a split manner. The two blocks are bolted through the connecting hole 123 and can be disassembled and sealed to form an annular structure that is adapted to the top opening of the assembled well chamber 1. At least one cover plate assembly (such as the second cover plate assembly 42) is provided with a mounting structure 43 (such as an annular boss or a flange interface) adapted to the bottom end of the vertical shaft 2, for fixing the bottom end of the vertical shaft 2; The specific sealing connection process is as follows: first, the bottom end of the vertical wellbore 2 is fixed to one of the cover plate blocks (such as the second cover plate block 42) through the mounting structure 43; then the two cover plate blocks are snapped into the top opening of the prefabricated well chamber 1 and spliced ​​by fastening with bolts; finally, an expansion seal 15 is set at the joint between the cover plate block and the top of the prefabricated well chamber 1, and a sealing gasket is set on the contact surface between the vertical wellbore 2 and the cover plate block to ensure the overall sealing performance.

[0041] In this embodiment, the installation method of the mounting hole 132 of the second arc-shaped block 13 and the first sleeve 3 is consistent with that of Example 1; the expansion seals 15 at the joints of each arc-shaped block and in the side grooves are also arranged in the same way as in Example 1 to ensure the sealing of the well chamber body itself.

[0042] In this embodiment, when a drainage branch pipe is provided in the height direction of the original brick-built inspection well, the vertical well shaft 2 is divided into at least two sections along the height direction, and each section of the well shaft is detachably connected at the position corresponding to the drainage branch pipe through an open clamp 6, which is consistent with Example 1; and the selection of the material of each pipe sleeve and the sealing connection method between each pipe sleeve and the opening, as well as the sealing connection method between each sleeve and the drainage pipe 012 / drainage branch pipe are all consistent with Example 1, and will not be repeated again.

[0043] The present invention optimizes the sealing connection structure between the prefabricated well chamber 1 and the vertical wellbore 2 through different embodiments for scenarios with different diameter ratios and axis relationships (coaxial / eccentric): direct edge sealing is adopted in the coaxial small diameter ratio scenario, and indirect sealing is adopted by a spliced ​​cover plate 4 in the eccentric small diameter ratio scenario, taking into account both assembly efficiency and sealing reliability, and is suitable for the needs of repairing vertical well chambers in pipeline networks under different working conditions.

[0044] Example 3 The present invention further provides a repair construction method for an assembled repair structure of a circular manhole in a pipe network, as described in Example 1 or Example 2, which is suitable for scenarios where a brick-built manhole requires rapid repair due to damage, leakage, or structural failure. The present invention achieves efficient construction, good sealing, and structural stability through modular assembly, sealed connection, and adaptive structural adjustment. The following describes the method in detail in conjunction with the specific steps and improvement scheme: 1. Preparation before construction (S01-S02) S01. Preliminary cleaning and measurement First, the damaged brick inspection well is cleaned: the damaged brickwork, loose mortar layer, and deposited silt and debris in the well chamber are removed, and the well wall and bottom are flushed with a high-pressure water gun to ensure that there are no residual obstacles in the repair area and the surface is flat; then, using measuring tools such as laser rangefinders, tape measures and total stations, the key dimensions of the original brick inspection well are comprehensively measured, including: the inner diameter of the well chamber, the well depth, and the eccentricity distance between the wellbore and the axis of the well chamber; at the same time, the outer diameter, center elevation and direction of each drainage pipe 012 connected to the well chamber, as well as the position coordinates, outer diameter and connection angle of the drainage branch pipe (if any); the measurement data must be recorded and archived as the basis for subsequent component processing.

[0045] S02. Component prefabrication and processing Based on the measurement data of step S01, the core components of the prefabricated repair structure are prefabricated in a factory: Specifically, the well chamber body is divided: according to the inner diameter and circumference of the well chamber, the well chamber is evenly divided into multiple pairs of first arc-shaped blocks 12 along the circumferential direction; if the well chamber needs to be connected to a corresponding drainage pipe 012, at least one pair of second arc-shaped blocks 13 is further divided (so that corresponding through holes or semi-through holes can be opened on their outer walls in advance or later); Cover plate segmentation: If the original wellbore is parallel to the wellbore axis and eccentrically arranged, the top opening area of ​​the wellbore is segmented into a first cover plate segment 41 and a second cover plate segment 42 (covering the eccentric area) to ensure that the top surface is flat after being spliced; Segmentation of the vertical shaft 2: According to the location of the drainage branch pipe (if any), the vertical shaft 2 is divided into at least two sections in the height direction. Each section corresponds to the location of a drainage branch pipe, and an opening clamp 6 installation position is preset at the segment interface; Casting: All arc-shaped blocks, cover blocks and vertical shaft 2 are cast with ductile iron, and mounting holes 132, bolt holes and sealing grooves are reserved during casting; after casting, the surface of the components is polished to remove burrs and painted with anti-rust primer.

[0046] 2. Core Repair Construction Steps (S1-S3) S1. Assembly and connection of well chamber body Hoisting and supporting the base 11: Hoist the base 11 to the bottom of the well, and use a level to adjust the elevation of the top surface of the base 11 to ensure that the base 11 is level and stable; Lifting and splicing of arc-shaped blocks: Each arc-shaped block is hoisted to the bottom of the well in sequence, and the connection holes 123 on the connecting plates 122 of adjacent blocks are aligned and then bolted together to form a cylindrical well chamber body 14 with two ends open. During the splicing process, the gaps between the blocks are filled with expansion seals 15 to ensure overall sealing. Connect the cylindrical well body 14 to the base 11: After the cylindrical well body 14 is assembled, align its bottom end with the annular boss on the top surface of the base 11 and fasten it detachably with the presser 5 or bolts to ensure that there is no relative displacement between the well body and the base 11; Drain pipe 012 connection: Install a U-shaped sealing ring 011 at the preset mounting hole 132 (corresponding to the position of the drain pipe 012) on the side wall of the cylindrical well body 14. Insert the first pipe sleeve 3 through the mounting hole 132 so that the U-shaped sealing ring 011 is fixed in the gap between the mounting hole 132 and the pipe sleeve. Then, insert the other end of the first pipe sleeve 3 into the corresponding drain pipe 012. If the diameter of the first pipe sleeve 3 is larger than the outer diameter of the drain pipe 012, fill it with a water-expandable water stop ring between the pipe sleeve and the drain pipe 012 to ensure a seal. Special case handling: If the diameter of the first pipe sleeve 3 is larger than the original brick inspection well mouth size, first cut the first pipe sleeve 3 along the axial direction and roll it to a diameter smaller than the well mouth size. After hoisting it to the bottom of the well, use the hydraulic expander to expand the pipe sleeve to the preset diameter (matching the outer diameter of the drainage pipe 012), and then weld the expanded part into shape (see Figure 10 , forming a weld 10) on the first pipe sleeve 3, and finally completing the plug-in seal with the drain pipe 012; S2. Top structure assembly and connection According to the relative position relationship between the well chamber body and the vertical wellbore 2, there are two implementation scenarios: Case 1: Coaxial setting: When the axes of the wellbore body and the vertical shaft 2 coincide, hoist the vertical shaft 2 to just above the top opening of the wellbore body. Use the hanging line to adjust the verticality of the vertical shaft 2 so that its bottom end is aligned with the annular flange of the top opening of the wellbore body. Fasten the two together with flange bolts to ensure that there is no misalignment at the joint. Case 2: Eccentric setting: When the shaft of the well chamber body and the vertical shaft 2 are parallel but eccentric, first hoist the cover plate blocks to the top of the well chamber body opening, align the alignment holes of the cover plate blocks with the top opening of the well chamber body, and initially fix them; adjust the horizontality of the cover plate blocks and further tighten them to form a sealed cover plate structure; then hoist the vertical shaft 2 to the top of the cover plate structure, align the bottom end of the vertical shaft 2 with the mounting structure 43 on the cover plate, and tighten them with high-strength bolts to ensure that the vertical shaft 2 and the cover plate fit tightly; Handling of special situations: If the original wellbore is provided with a drainage branch pipe along the height direction, the vertical wellbore 2 is divided into at least two sections according to the branch pipe position (the height of each section matches the branch pipe spacing), and an open clamp 6 is set at the segment interface; the two vertical wellbore sections stacked up and down are fastened together by bolts of the open clamp 6, and the second pipe sleeve 7 on the clamp is inserted into the corresponding drainage branch pipe, and the sealing of the branch pipe connection is ensured.

[0047] S3. Water flow test, hydraulic pressure test and backfill Water flow test: inject clean water into the repaired inspection well and observe for 30 minutes to check whether there is any leakage at the arc-shaped block joints, pipe sleeve interfaces and drainage pipe 012 / drainage branch pipe connections; Water pressure test (only for pressure drainage system): Close the outlet of drainage pipe 012, pressurize the well to the design pressure through the water pump, maintain the pressure for 30 minutes, and pass the test if the pressure drop is ≤0.02MPa and there is no leakage at all joints and pipe connections; Foam concrete backfill: After the test is passed, C30 fine stone concrete (or foam concrete) is used to backfill the area around the inspection well in layers. After backfilling to the original ground elevation, the surface is covered with medium-coarse sand.

[0048] The present invention achieves efficient and sealed repair of vertical well chamber inspection shafts through preliminary measurement and prefabrication, modular assembly connection and adaptive structural adjustment; customized prefabrication of components improves adaptability, modular splicing shortens the construction period, multiple sealing designs ensure anti-seepage performance, and the segmented adjustable structure adapts to complex pipe network environments, ultimately forming a structurally stable, durable and reliable repair effect.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An assembled repair structure for a circular manhole inspection well in a pipe network, characterized in that: It includes a vertically arranged assembled well chamber, a vertical wellbore detachably connected to the assembled well chamber, and a first pipe sleeve; The assembled well chamber includes a base, a plurality of pairs of first arc-shaped blocks, and at least one pair of second arc-shaped blocks. The plurality of arc-shaped blocks are detachably and sealably assembled into a cylindrical well chamber body with openings at both ends. The base is detachably and sealably blocked at the bottom opening of the cylindrical well chamber body. The second arc-shaped block includes a second arc-shaped block body, and a through hole or a semi-through hole is opened on the side wall of the second arc-shaped block body, and adjacent semi-through holes can be combined into a mounting hole with a preset diameter; One end of the first pipe sleeve is sealed and connected to the mounting hole / the through hole, and the other end is used for sealing and connecting to the corresponding drain pipe; The vertical wellbore is a cylindrical body with openings at both ends, and the bottom opening thereof is detachably and sealedly connected to the top opening of the cylindrical well chamber body.

2. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 1 is characterized in that: A first sealing connection portion extends from the bottom end of each arc-shaped block, and a first groove is formed on the inner wall of the first sealing connection portion; Each first groove is sealed and connected to form a first sealing groove when the cylindrical well chamber body is spliced ​​together; an expandable sealing member is arranged in the first sealing groove for sealing connection with the base.

3. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 1 or 2, characterized in that: If the vertical wellbore and the assembled well chamber are coaxially arranged, and the diameter ratio between the two is greater than or equal to a preset value; A second sealing connection portion extends from the top of each arc-shaped block, and a second groove is formed on the inner wall of the second sealing connection portion; Each second groove is sealed and connected to form a second sealing groove when the cylindrical well chamber body is spliced ​​together; an expandable sealing member is provided in the second sealing groove for achieving a sealed connection with the vertical wellbore.

4. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 1 or 2, characterized in that: If the axes of the vertical wellbore and the prefabricated well chamber are parallel and eccentrically arranged, and the diameter ratio between the two is less than a preset value; The bottom end of the vertical wellbore and the top end of the assembled well chamber are sealed and detachably connected via a spliced ​​cover plate.

5. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 4 is characterized in that: The spliced ​​cover plate comprises at least a first cover plate block and a second cover plate block which are arranged in a split manner; The first cover plate assembly and the second cover plate assembly are spliced ​​into a shape that is adapted to the top opening of the assembled well chamber through a detachable seal; At least one cover plate assembly is provided with a mounting structure adapted to be installed and plugged into the bottom end of the vertical shaft.

6. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 1 or 2, characterized in that: The first arc-shaped block includes a first arc-shaped block body and connecting plates respectively arranged on both sides of the first arc-shaped block body, and the connecting plates are also respectively arranged on both sides of the second arc-shaped block body; Each of the connecting plates extends toward the center of the cylindrical well body; Each connecting plate is provided with a plurality of connecting holes spaced apart along its height direction; Adjacent first arc-shaped blocks, adjacent second arc-shaped blocks, and first arc-shaped blocks and second arc-shaped blocks are detachably bolted together into one piece through corresponding connecting holes.

7. The assembled repair structure for a circular manhole inspection well in a pipe network according to claim 1 or 2, characterized in that: If the original brick inspection well is also provided with a drainage branch pipe along the height direction of the well shaft, the vertical well shaft is divided into at least two sections, and an open clamp is provided at the corresponding drainage branch pipe, and the vertical well shaft sections stacked up and down are connected into one piece by the open clamp; The open clamp includes a clamp body that is split into two parts and has two openings arranged along the axial direction and at least one side opening arranged along the radial direction. A second pipe sleeve is provided at the side opening for connecting a drainage branch pipe.

8. A repair construction method for a prefabricated repair structure of a circular manhole in a pipe network as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1. First, hoist the base to the bottom of the well and level and support it; then hoist each arc-shaped block and the first pipe sleeve to the bottom of the well; seal and splice the arc-shaped blocks according to the layout of the drainage pipe to form a cylindrical well chamber body with open ends, and detachably fasten the bottom end of the cylindrical well chamber body to the base; Then, a U-shaped sealing ring is clamped at the mounting hole / through hole on the side wall of the cylindrical well body, and the first pipe sleeve is passed through the corresponding mounting hole / through hole and sealed and inserted into the corresponding drainage pipe; S2. If the vertical wellbore and the assembled well chamber are coaxially arranged, hoist the vertical wellbore to the desired position, and seal the bottom end of the vertical wellbore into the top opening of the cylindrical well chamber body; If the axes of the vertical shaft and the prefabricated well chamber are parallel and eccentrically arranged, first hoist the various cover plate segments to the desired position, seal and splice the cover plate segments, and place the sealing cover on the top opening of the prefabricated well chamber; hoist the vertical shaft to the desired position, and seal and plug the bottom end of the vertical shaft into the mounting structure on the spliced ​​cover plate; S3. Carry out water flow test and water pressure test on the installed repair structure; after passing the test, use foam concrete to backfill the area around the inspection well to complete the repair construction.

9. The repair construction method according to claim 8, characterized in that: In step S1, if the diameter of the first pipe sleeve is larger than the size of the original brick-built inspection well mouth, the first pipe sleeve is first cut open and rolled to a diameter smaller than the well mouth size, and then hoisted to the bottom of the well and expanded to a preset diameter using a spreading tool and welded into shape; then one end of the welded first pipe sleeve is inserted into the open end of the mounting hole / through hole, and the other end is sealed and plugged into the corresponding drainage pipe.

10. The repair construction method according to claim 8 or 9, characterized in that: If the original brick-built inspection well is also provided with a drainage branch pipe along the height direction of the well shaft, in step S2, the vertical well shaft is divided into at least two sections, and an open clamp is provided at the corresponding drainage branch pipe; the vertical well shaft sections stacked up and down are connected into one by the open clamp; and the second pipe sleeve on the open clamp is connected to the corresponding drainage branch pipe.

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