A manhole and pipe socket integrated prefabricated structure and construction method

Abstract

The application discloses an integrated prefabricated structure of an inspection well and a pipe socket and a construction method, and mainly relates to the field of pipe network equipment. The integrated prefabricated structure comprises a prefabricated inspection well body, a socket base and a socket sleeve. The socket base is integrally formed on the side wall of the prefabricated inspection well body and is in communication with the interior of the prefabricated inspection well body. An installation cavity is formed in the socket base, and the inner wall of the installation cavity is provided with a concave arc adjusting surface. The application has the beneficial effects that it can adapt to the deviation of the pipe axis and the slope, and can detect the sealing state before final locking, thereby improving the construction reliability and the anti-seepage performance of the connection between the inspection well and the pipe.

Description

Technical Field

[0001] This invention relates to the field of pipeline equipment, specifically to an integrated prefabricated structure and construction method for manholes and pipe sockets. Background Technology

[0002] Inspection wells are important structures in municipal drainage pipe networks, typically located at pipe bends, junctions, diameter changes, drop structures, and at certain intervals, for pipe inspection, dredging, and maintenance. With the development of prefabricated municipal engineering, precast inspection wells are gradually replacing traditional brick and cast-in-place inspection wells to improve construction efficiency and project quality. Currently, when connecting precast inspection wells to pipes, a common method is to pre-drill holes in the side wall of the inspection well, insert the end of the pipe into the pre-drilled holes on site, and then seal them with mortar, poured concrete, sealing rings, or waterproofing materials. While this method achieves a basic connection, it still has the following shortcomings: First, the direction of the reserved holes or precast sockets on the sidewalls of precast inspection wells is usually fixed. However, on-site pipeline construction is affected by factors such as pit excavation, foundation settlement, and pipe section installation errors. The pipeline axis, elevation, and slope are prone to deviation from the reserved socket, which makes it difficult to connect the pipeline and may even require on-site hole enlargement, hole repair, or forced adjustment of the pipeline position.

[0003] Secondly, the sealing quality at the connection between the pipeline and the inspection well is difficult to test in a timely manner after the partial connection is completed. Traditionally, a water tightness test is usually conducted after the entire pipeline network is formed. Once leakage is found at the joint, the rework area is large and the handling is difficult.

[0004] Third, although some prefabricated manholes are equipped with pre-embedded sleeves, sockets or sealing rings, these structures are mostly fixed connection structures, and their ability to adapt to field deviations is limited. If the flexible seals are used to absorb the deviations, the connection may still loosen, crack or leak after being affected by soil pressure, water pressure, vehicle load or uneven settlement for a long time.

[0005] Fourth, existing pipe and manhole connection structures often treat "adjustment," "sealing," and "final fixing" as separate processes, lacking a continuous construction structure that allows for on-site adjustment, leak detection, and final fixing. This results in construction quality being significantly affected by human operation and insufficient standardization.

[0006] Therefore, it is necessary to provide an integrated prefabricated structure and construction method for manholes and pipe sockets, so that the pipe connection part of the manhole sidewall can be prefabricated in the factory, adapt to the deviation of the pipeline axis and slope on site, and the sealing status can be tested before final locking, thereby improving the construction reliability and seepage prevention performance of the manhole-pipe connection. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated prefabricated structure and construction method for manholes and pipe sockets, which can adapt to deviations in the pipeline axis and slope on site, and can detect the sealing status before final locking, thereby improving the construction reliability and seepage prevention performance of the manhole-pipe connection.

[0008] To achieve the above objectives, the present invention employs the following technical solution: A prefabricated structure integrating inspection well and pipe socket includes a prefabricated inspection well body, a socket base, and a socket sleeve; The socket base is integrally formed on the side wall of the prefabricated inspection well body and communicates with the interior of the prefabricated inspection well body; an installation cavity is formed inside the socket base, and the inner wall of the installation cavity is provided with a concave arc-shaped adjustment surface; The socket sleeve is disposed within the mounting cavity. The outer periphery of the socket sleeve is provided with a convex arc-shaped mating surface that mates with the concave arc-shaped adjustment surface, so that the socket sleeve can be angled relative to the socket base before locking. The socket sleeve is provided with a socket cavity for inserting the end of the pipe. The socket cavity is provided with two elastic sealing elements arranged axially at intervals. An annular leak detection cavity is formed between the two elastic sealing elements. The socket sleeve is provided with a detection hole communicating with the annular leak detection cavity. A locking grouting cavity is formed between the outer periphery of the socket sleeve and the socket base, and the locking grouting cavity is connected to a grouting hole and a vent hole.

[0009] The concave arc-shaped adjustment surface is a spherical segment or a circular arc segment, and the convex arc-shaped mating surface is a spherical segment or a circular arc segment that is adapted to the concave arc-shaped adjustment surface.

[0010] The two elastic sealing elements include a first elastic sealing ring and a second elastic sealing ring. The inner wall of the socket cavity is provided with a first sealing ring groove and a second sealing ring groove. The first elastic sealing ring is disposed in the first sealing ring groove, and the second elastic sealing ring is disposed in the second sealing ring groove.

[0011] The locking grouting cavity is an annular cavity surrounding the outer periphery of the socket sleeve. The grouting hole is located at the lower part or lower side of the socket base or socket sleeve, and the vent hole is located at the upper part or upper side of the socket base or socket sleeve.

[0012] The cavity wall of the locking grouting cavity is provided with a rough mating surface, anchoring ribs or annular anti-reverse groove to enhance the bonding strength between the locking sealing grout and the socket base and socket sleeve after curing.

[0013] An adjustment and limiting structure and a temporary positioning structure are provided between the socket base and the socket sleeve; The adjusting and limiting structure includes a limiting groove disposed on the socket base and a limiting protrusion disposed on the outer periphery of the socket sleeve, wherein the limiting protrusion extends into the limiting groove; The temporary positioning structure includes positioning bolts, positioning pressure plates, pressure rings, or wedge-shaped positioning blocks, used to maintain the adjustment position of the socket sleeve relative to the socket base before grouting in the locking grouting cavity.

[0014] The socket cavity is provided with a flared guide section on the side near the pipe insertion end, and a limiting step is provided on the side of the socket cavity near the interior of the prefabricated inspection well body. The limiting step is used to limit the insertion depth of the pipe end.

[0015] A construction method for an integrated prefabricated structure of inspection well and pipe socket includes the following steps: S1. Arrange the steel reinforcement skeleton and the core of the socket base forming mold in the prefabricated inspection well mold, pour concrete, so that the prefabricated inspection well body and the socket base are formed as one piece, and the installation cavity, grouting hole and vent hole are formed in the socket base. S2. Insert the socket sleeve into the mounting cavity, so that the convex arc-shaped mating surface of the outer periphery of the socket sleeve mates with the concave arc-shaped adjusting surface of the inner wall of the mounting cavity, and form a locking grouting cavity between the socket sleeve and the socket base. S3. Hoist the prefabricated inspection well body to the design position and adjust the elevation and orientation of the prefabricated inspection well body; S4. Adjust the angle of the socket sleeve relative to the socket base according to the axis, elevation and slope of the pipe to be connected, and temporarily fix the socket sleeve. S5. Insert the end of the pipe into the socket cavity so that the outer wall of the pipe is sealed with the two elastic seals and an annular leak detection cavity is formed between the two elastic seals. S6. Perform a sealing test on the annular leak detection chamber through the detection hole. After the test is qualified, inject locking and sealing grout into the locking grouting chamber. After the grout comes out of the vent hole, seal the grouting hole and the vent hole. S7. After the locking sealant has cured, conduct a water tightness test. Backfill only after the water tightness test is passed. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention integrates the socket base with the prefabricated manhole body, allowing the pipe connection part on the manhole sidewall to be formed in the factory prefabrication stage, reducing on-site drilling, enlarging, repairing and post-pouring sealing operations, and improving the standardization of construction.

[0016] 2. The present invention provides a socket sleeve inside the socket base, and through the cooperation of the concave arc-shaped adjustment surface and the convex arc-shaped mating surface, the socket sleeve can be angled before locking, thereby adapting to the deviation of pipeline axis, elevation and slope on site, and improving the on-site adaptability of prefabricated inspection well and pipeline connection.

[0017] 3. This invention forms a double seal through two elastic sealing elements and an annular leak detection cavity between the two elastic sealing elements, which can detect the local sealing status before final grouting and locking, reducing the risk of rework after leakage is found during the overall water tightness test. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Appendix Figure 2 This is a cross-sectional structural diagram of the connection between the socket base, the socket sleeve, and the pipe in this invention.

[0020] Appendix Figure 3 This is a partially enlarged schematic diagram of the sealing and leak detection structure inside the socket sleeve in this invention.

[0021] Appendix Figure 4 This is a partially enlarged schematic diagram of the locking grouting cavity and its wall structure in this invention.

[0022] Appendix Figure 5 This is a schematic diagram illustrating the arrangement of the limiting groove and the limiting protrusion in this invention.

[0023] Appendix Figure 6 This is a schematic diagram of the temporary positioning structure in this invention.

[0024] The labels shown in the attached diagram: 1. Prefabricated inspection well body; 2. Socket base; 3. Socket sleeve; 4. Installation cavity; 5. Concave arc-shaped adjustment surface; 6. Convex arc-shaped mating surface; 7. Socket cavity; 8. First sealing ring groove; 9. Second sealing ring groove; 10. First elastic sealing ring; 11. Second elastic sealing ring; 12. Annular leak detection chamber; 13. Detection hole; 14. Locking grouting cavity; 15. Grouting hole; 16. Vent hole; 17. Limiting groove; 18. Limiting protrusion; 19. Temporary positioning structure; 20. Flared guide section; 21. Limiting step; 22. Pipe; 23. Rough mating surface; 24. Anchoring ribs. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0026] like Figures 1 to 4As shown, this embodiment provides an integrated prefabricated structure for manholes and pipe sockets, including a prefabricated manhole body 1, a socket base 2, and a socket sleeve 3.

[0027] The precast manhole body 1 is a precast reinforced concrete structure, which can be a circular manhole, a rectangular manhole, or an irregularly shaped manhole formed according to the needs of the pipeline network layout. The interior of the precast manhole body 1 can be equipped with conventional manhole structures such as manhole chambers, flow channels, steps, and manhole connection parts. The side wall of the precast manhole body 1 is provided with a socket base 2 for connecting the pipeline 22.

[0028] The socket base 2 is integrally formed on the side wall of the precast manhole body 1 and communicates with the interior of the precast manhole body 1. Specifically, during the factory prefabrication process, a steel reinforcement skeleton and a socket base forming core can be arranged in the precast manhole mold. After pouring concrete, the precast manhole body 1 and the socket base 2 are integrally formed. After the socket base 2 and the precast manhole body 1 are integrally formed, the on-site drilling and sealing operations can be reduced, and the overall strength of the socket connection can be improved. An installation cavity 4 is formed inside the socket base 2. The installation cavity 4 is used to install the socket sleeve 3. The inner wall of the installation cavity 4 is provided with a concave arc-shaped adjustment surface 5. The socket sleeve 3 is placed in the installation cavity 4, and the outer periphery of the socket sleeve 3 is provided with a convex arc-shaped mating surface 6. The convex arc-shaped mating surface 6 and the concave arc-shaped adjustment surface 5 cooperate, so that the socket sleeve 3 can be angled relative to the socket base 2 before locking.

[0029] In this embodiment, the concave arc-shaped adjustment surface 5 can be a spherical segment, and the convex arc-shaped mating surface 6 can be a spherical segment adapted to the spherical segment. Through the mating of the spherical segments, the socket sleeve 3 can be deflected at a small angle in a near-universal adjustment manner. As another embodiment, the concave arc-shaped adjustment surface 5 can also be a circular arc segment, and the convex arc-shaped mating surface 6 can also be a circular arc segment adapted to it, so as to achieve angle adjustment in a single direction or a predetermined direction. With the above structure, when there is a deviation between the axis, elevation, or slope of the pipeline 22 to be connected on site and the design axis of the socket base 2, the angle of the socket sleeve 3 can be adjusted first to make the insertion direction of the socket sleeve 3 adapt to the actual position of the pipeline 22, without the need to enlarge or repair the socket base 2 on site.

[0030] The socket sleeve 3 has a socket cavity 7. The socket cavity 7 is used for inserting the end of the pipe 22. The socket cavity 7 has two elastic sealing elements arranged axially at intervals. After the pipe 22 is inserted into the socket cavity 7, the two elastic sealing elements respectively elastically seal against the outer wall of the pipe 22, thereby forming a double-seal structure between the pipe 22 and the socket sleeve 3. In this embodiment, the two elastic sealing elements include a first elastic sealing ring 10 and a second elastic sealing ring 11. The inner wall of the socket cavity 7 has a first sealing ring groove 8 and a second sealing ring groove 9. The first elastic sealing ring 10 is disposed in the first sealing ring groove 8, and the second elastic sealing ring 11 is disposed in the second sealing ring groove 9. The first sealing ring groove 8 and the second sealing ring groove 9 can respectively position the first elastic sealing ring 10 and the second elastic sealing ring 11, preventing axial movement of the sealing rings during pipe 22 insertion. An annular leak detection cavity 12 is formed between the first elastic sealing ring 10 and the second elastic sealing ring 11. The socket sleeve 3 is provided with a test hole 13 that communicates with the annular leak detection chamber 12. The test hole 13 can be connected to a test connector, which can be connected to a pneumatic pressure testing device, a hydraulic pressure testing device, or other testing equipment. During construction, the test medium can be injected into the annular leak detection chamber 12 through the test hole 13, and a pressure holding test can be performed. If the pressure remains within the allowable range within the set test time, it indicates that the sealing condition between the first elastic sealing ring 10, the second elastic sealing ring 11, and the outer wall of the pipe 22 meets the requirements.

[0031] As a preferred embodiment, the detection hole 13 can be connected to a detachable detection connector or a sealing element. When testing is required, the detection connector is installed in the detection hole 13; after testing is completed, the detection connector is removed and the detection hole 13 is sealed with a sealing element to ensure that the annular leak detection chamber 12 is in a closed state.

[0032] A locking grouting cavity 14 is formed between the outer periphery of the socket sleeve 3 and the socket base 2. The locking grouting cavity 14 is used to inject locking sealing grout. The locking sealing grout can be non-shrink grout, waterproof mortar, polymer cement-based grout, or other locking and sealing materials suitable for underground pipeline connections. After the locking sealing grout cures, it can connect the socket sleeve 3 and the socket base 2 into a whole, thereby improving the stability of the connection structure.

[0033] The locking grouting cavity 14 is connected to a grouting hole 15 and a vent hole 16. The grouting hole 15 is used to inject locking and sealing grout into the locking grouting cavity 14, and the vent hole 16 is used to expel air from the locking grouting cavity 14. Preferably, the grouting hole 15 is located at the lower part or lower side of the socket base 2 or socket sleeve 3, and the vent hole 16 is located at the upper part or upper side of the socket base 2 or socket sleeve 3. During grouting, the locking and sealing grout fills the locking grouting cavity 14 from bottom to top or from lower side to top. When grout is discharged from the vent hole 16, it indicates that the locking grouting cavity 14 is basically full.

[0034] To improve the bonding strength of the locking sealant after curing, the cavity wall of the locking grouting cavity 14 is provided with a rough mating surface 23, an anchoring rib 24, or an annular anti-reverse groove. The rough mating surface 23 can be formed by molding, roughening, sandblasting, or pre-fabricating a rough texture. The anchoring rib 24 can be a protrusion structure arranged circumferentially or axially. The annular anti-reverse groove can be an annular groove provided on the opposite surface of the socket base 2 or the socket sleeve 3. After the locking sealant cures, it forms a mechanical engagement with the rough mating surface 23, the anchoring rib 24, or the annular anti-reverse groove, thereby improving the pull-out resistance and deflection resistance of the socket sleeve 3 relative to the socket base 2.

[0035] An adjustment and limiting structure can also be provided between the socket base 2 and the socket sleeve 3. The adjustment and limiting structure includes a limiting groove 17 provided on the socket base 2 and a limiting protrusion 18 provided on the outer periphery of the socket sleeve 3. The limiting protrusion 18 extends into the limiting groove 17. When the socket sleeve 3 is adjusted to a predetermined limit angle, the limiting protrusion 18 abuts against the groove wall of the limiting groove 17, thereby limiting the maximum adjustment angle of the socket sleeve 3 and preventing excessive deflection of the socket sleeve 3 from affecting the sealing effect.

[0036] A temporary positioning structure 19 can also be provided between the socket base 2 and the socket sleeve 3. The temporary positioning structure 19 can be a positioning bolt, a positioning pressure plate, a pressure ring, or a wedge-shaped positioning block. After the socket sleeve 3 is adjusted to the correct position, it is temporarily fixed by the temporary positioning structure 19 so that it remains in the adjusted position before the pipe 22 is inserted and the grouting cavity 14 is grouted.

[0037] The socket cavity 7 has a flared guide section 20 on the side near the pipe insertion end. The inner diameter of the flared guide section 20 gradually decreases along the pipe insertion direction to guide the end of the pipe 22 into the socket cavity 7. The socket cavity 7 has a limiting step 21 on the side near the interior of the prefabricated inspection well body 1. After the end of the pipe 22 is inserted into the socket cavity 7, it can abut against or approach the limiting step 21, thereby limiting the insertion depth of the pipe 22 and preventing insufficient or excessive insertion of the pipe 22.

[0038] This embodiment also provides a construction method for an integrated prefabricated structure of inspection well and pipe socket, including the following steps: S1. Prefabrication: A steel reinforcement frame and a socket base forming mold are arranged inside the prefabricated manhole mold. Concrete is poured to integrally form the prefabricated manhole body 1 and the socket base 2, and to form an installation cavity 4, a grouting hole 15, and a vent hole 16 within the socket base 2. The socket base forming mold can be used to form the installation cavity 4 and the concave arc-shaped adjustment surface 5 on the inner wall of the installation cavity 4.

[0039] S2. Sleeve assembly: Insert the socket sleeve 3 into the installation cavity 4, so that the convex arc-shaped mating surface 6 on the outer periphery of the socket sleeve 3 mates with the concave arc-shaped adjusting surface 5 on the inner wall of the installation cavity 4, and form a locking grouting cavity 14 between the socket sleeve 3 and the socket base 2.

[0040] S3. Well body positioning: After the foundation pit excavation, subbase construction and foundation leveling are completed at the construction site, the prefabricated inspection well body 1 is hoisted to the design position, and the elevation and orientation of the prefabricated inspection well body 1 are adjusted.

[0041] S4. Adjustment and positioning: According to the actual axis, elevation and slope of the pipe to be connected 22, adjust the angle of the socket sleeve 3 relative to the socket base 2 so that the socket cavity 7 of the socket sleeve 3 corresponds to the pipe to be connected 22; after the adjustment is completed, the socket sleeve 3 is temporarily fixed by the temporary positioning structure 19.

[0042] S5. Pipe insertion: Insert the end of pipe 22 into the socket cavity 7, so that the outer wall of pipe 22 is sealed with two elastic seals, and an annular leak detection cavity 12 is formed between the two elastic seals. Preferably, before inserting pipe 22, a first elastic seal 10 and a second elastic seal 11 can be installed in the first sealing ring groove 8 and the second sealing ring groove 9 respectively, and the outer wall of the end of pipe 22 can be cleaned.

[0043] S6. Leak Detection and Locking: The annular leak detection cavity 12 is sealed through the detection hole 13. After passing the test, locking and sealing grout is injected into the locking grouting cavity 14 through the grouting hole 15. During the grouting process, the air in the locking grouting cavity 14 is discharged through the vent hole 16. After the grout is discharged from the vent hole 16, the grouting hole 15 and the vent hole 16 are sealed.

[0044] S7. Acceptance and backfilling: After the locking and sealing grout has cured, a water tightness test is conducted at the connection between the manhole and pipe 22. After the water tightness test is passed, the manhole and pipe trench are backfilled in layers.

[0045] Through the above construction method, the present invention can form a continuous construction process of "prefabrication, sleeve assembly, well body positioning, adjustment and positioning, pipe socketing, leak detection and locking, acceptance and backfilling". This process not only ensures the integrated prefabrication of the socket base 2 and the prefabricated inspection well body 1, but also utilizes the adjustable capability of the socket sleeve 3 to adapt to on-site installation deviations, achieves local sealing detection through the annular leak detection cavity 12, and finally achieves stable locking of the socket sleeve 3 and the socket base 2 through the locking grouting cavity 14.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, equivalent substitutions or modifications can be made to the above-described structural form, connection method, sealing material, grouting material, or construction steps without departing from the concept of the present invention, and all such equivalent substitutions or modifications should fall within the protection scope of the present invention.

Claims

1. A prefabricated structure integrating inspection well and pipe socket, characterized in that, It includes a prefabricated manhole body (1), a socket base (2), and a socket sleeve (3); The socket base (2) is integrally formed on the side wall of the prefabricated inspection well body (1) and communicates with the interior of the prefabricated inspection well body (1); the socket base (2) has an installation cavity (4) and the inner wall of the installation cavity (4) is provided with a concave arc-shaped adjustment surface (5); the socket sleeve (3) is disposed in the installation cavity (4) and the outer periphery of the socket sleeve (3) is provided with a convex arc-shaped mating surface (6) that cooperates with the concave arc-shaped adjustment surface (5) so that the socket sleeve (3) can be angled relative to the socket base (2) before locking; The socket sleeve (3) is provided with a socket cavity (7) for the insertion of the end of the pipe (22). The socket cavity (7) is provided with two elastic seals arranged axially at intervals. An annular leak detection cavity (12) is formed between the two elastic seals. The socket sleeve (3) is provided with a detection hole (13) communicating with the annular leak detection cavity (12). A locking grouting cavity (14) is formed between the outer periphery of the socket sleeve (3) and the socket base (2), and the locking grouting cavity (14) is connected to a grouting hole (15) and an exhaust hole (16).

2. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, The concave arc-shaped adjustment surface (5) is a spherical segment or a circular arc segment, and the convex arc-shaped mating surface (6) is a spherical segment or a circular arc segment that is adapted to the concave arc-shaped adjustment surface (5).

3. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, The two elastic seals include a first elastic sealing ring (10) and a second elastic sealing ring (11). The inner wall of the socket cavity (7) is provided with a first sealing ring groove (8) and a second sealing ring groove (9). The first elastic sealing ring (10) is disposed in the first sealing ring groove (8), and the second elastic sealing ring (11) is disposed in the second sealing ring groove (9).

4. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, The locking grouting cavity (14) is an annular cavity surrounding the outer periphery of the socket sleeve (3). The grouting hole (15) is located at the lower part or lower side of the socket base (2) or the socket sleeve (3). The vent hole (16) is located at the upper part or upper side of the socket base (2) or the socket sleeve (3).

5. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, The wall of the locking grouting cavity (14) is provided with a rough mating surface (23), an anchoring rib (24) or an annular anti-reverse groove to enhance the bonding strength between the locking sealing grout and the socket base (2) and the socket sleeve (3) after curing.

6. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, An adjustment limiting structure and a temporary positioning structure (19) are provided between the socket base (2) and the socket sleeve (3). The adjusting limiting structure includes a limiting groove (17) provided on the socket base (2) and a limiting protrusion (18) provided on the outer periphery of the socket sleeve (3), wherein the limiting protrusion (18) extends into the limiting groove (17). The temporary positioning structure (19) includes positioning bolts, positioning pressure plates, pressure rings or wedge-shaped positioning blocks, used to maintain the adjustment position of the socket sleeve (3) relative to the socket base (2) before grouting in the locking grouting cavity (14).

7. The prefabricated structure integrating inspection well and pipe socket according to claim 1, characterized in that, The socket cavity (7) is provided with a flared guide section (20) on the side near the insertion end of the pipe (22), and a limiting step (21) is provided on the side near the interior of the prefabricated inspection well body (1). The limiting step (21) is used to limit the insertion depth of the end of the pipe (22).

8. A construction method for an integrated prefabricated structure of inspection well and pipe socket, characterized in that, The prefabricated structure integrating inspection well and pipe socket as described in any one of claims 1-7 includes the following steps: S1. Arrange the steel reinforcement skeleton and the core of the socket base forming mold in the prefabricated inspection well mold, pour concrete, so that the prefabricated inspection well body (1) and the socket base (2) are formed as a whole, and the installation cavity (4), grouting hole (15) and vent hole (16) are formed in the socket base (2). S2. Insert the socket sleeve (3) into the mounting cavity (4) so ​​that the convex arc-shaped mating surface (6) on the outer periphery of the socket sleeve (3) matches the concave arc-shaped adjusting surface (5) on the inner wall of the mounting cavity (4), and form a locking grouting cavity (14) between the socket sleeve (3) and the socket base (2). S3. Hoist the prefabricated inspection well body (1) to the design position and adjust the elevation and orientation of the prefabricated inspection well body (1); S4. According to the axis, elevation and slope of the pipe to be connected (22), adjust the angle of the socket sleeve (3) relative to the socket base (2) and temporarily fix the socket sleeve (3); S5. Insert the end of the pipe (22) into the socket cavity (7) so that the outer wall of the pipe (22) is sealed with the two elastic seals and an annular leak detection cavity (12) is formed between the two elastic seals. S6. The annular leak detection chamber (12) is sealed through the detection hole (13). After the test is qualified, the locking sealing grout is injected into the locking grouting chamber (14). After the grout comes out of the vent hole (16), the grouting hole (15) and the vent hole (16) are sealed. S7. After the locking sealant has cured, conduct a water tightness test. After the water tightness test is passed, backfill.

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