A prefabricated combined assembly inspection well and construction method thereof

Abstract

The present invention discloses a prefabricated combined assembled inspection well and its construction method, belonging to the technical field of inspection wells. A lower well chamber is arranged above the base of the prefabricated combined assembled inspection well, an upper well chamber is arranged above the lower well chamber, the upper well chamber and the lower well chamber are tightly connected through a locking member, and a cover plate is arranged at the top of the upper well chamber. The locking member includes a first convex plate arranged at the top end of the lower well chamber, a hemispherical first installation groove is arranged on the first convex plate, a hemispherical first clamping ball is rotatably arranged in the first installation groove, a second convex plate is arranged at the bottom end of the upper well chamber, a hemispherical second installation groove is arranged on the second convex plate, and a hemispherical second clamping ball adapted to the first clamping ball is rotatably arranged in the second installation groove. By adopting the prefabricated combined assembled inspection well and its construction method of the present invention, the problem of poor stability of the connection structure of the existing prefabricated inspection well can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of inspection wells, and in particular to a prefabricated combined assembled inspection well and a construction method thereof. Background Art

[0002] Inspection wells, also known as inspection wells or manholes, are common underground facilities in municipal engineering and construction projects, mainly used for the inspection, cleaning and maintenance of pipeline systems. It provides access to underground pipelines, allowing workers to enter or use professional equipment to inspect, dredge or repair pipelines. The advantages and characteristics of inspection wells include: easy maintenance, allowing quick access to underground pipelines without large-scale excavation, reducing maintenance costs; safety monitoring, helping to regularly check the condition of pipelines and prevent accidents such as leakage, blockage or damage; drainage management, during the rainy season or peak drainage period, inspection wells can assist in the discharge of accumulated water and prevent water accumulation on the road; segmented isolation, when a pipeline system fails, the affected section can be isolated through the inspection well to reduce the scope of impact.

[0003] Inspection wells are generally prepared by cast-in-place or bricklaying. This construction method leads to relatively low construction efficiency and a long construction period for inspection wells. The existing patent CN108867844A discloses a combined sewage well prefabricated part, including a sewage well chamber, a sewage well closing section, and a sewage well shaft. The lower end of the sewage well chamber adopts a tenon and tenon groove plug-in base, the upper end of the sewage well chamber and the sewage well closing section adopt a tenon and tenon groove plug-in, and the lower end of the sewage well shaft and the upper end of the sewage well closing section adopt a tenon and tenon groove plug-in. A pipe interface is left on the sewage well chamber, and a sewage pipe is connected to the pipe interface. The combined sewage well prefabricated part is low-carbon and environmentally friendly. The production and use of assembled reinforced concrete inspection wells can save the loss of limited land resources, and there is no need to use coal and clay resources. It belongs to a green building material product; it has good integrity, good stability, low cost, and long service life. However, in the above patent, the sections are only connected by tenons and tenons, which makes the stability of the prefabricated connection relatively poor. Summary of the invention

[0004] The purpose of the present invention is to provide a prefabricated combined assembly type inspection well and a construction method thereof, so as to solve the problem of poor stability of the existing prefabricated inspection well connection structure.

[0005] To achieve the above-mentioned objectives, the present invention provides a prefabricated combined assembled inspection well, including a base, a lower well chamber is arranged above the base, the lower well chamber and the base are connected by a locking structure, a connecting hole connected to a pipeline is arranged on the side wall of the lower well chamber, an upper well chamber is arranged above the lower well chamber, the upper well chamber and the lower well chamber are locked and connected by a locking member, a cover plate is arranged on the top of the upper well chamber, and a wellhead for installing the well cover is arranged on the cover plate; the locking member includes a first convex plate arranged at the top of the lower well chamber, a hemispherical first mounting groove is arranged on the first convex plate, a hemispherical first clamping ball is rotatably arranged in the first mounting groove, a first rotating structure for driving the first clamping ball to rotate is arranged on the first convex plate, a second convex plate is arranged at the bottom end of the upper well chamber, the second convex plate is located outside the first convex plate, a clamping groove for inserting the second convex plate is arranged at the top of the lower well chamber, a hemispherical second mounting groove is arranged on the second convex plate, a hemispherical second clamping ball adapted to the first clamping ball is rotatably arranged in the second mounting groove, and a second rotating structure for driving the second clamping ball to rotate is arranged on the second convex plate.

[0006] Preferably, the locking structure includes a positioning seat arranged on the upper surface of the base, the bottom cover of the lower well chamber is arranged outside the positioning seat, the positioning seat and the base are coaxially arranged as a whole, a protrusion is arranged on the side wall of the positioning seat, and a retaining ring for locking the protrusion is arranged on the bottom side wall of the lower well chamber, the protrusion is located in the retaining ring and is rotatably connected to the retaining ring, and a connecting hole connected to the retaining ring is provided on the bottom surface of the lower well chamber, and the protrusion is inserted into the retaining ring through the connecting hole.

[0007] Preferably, a sealing gasket is provided between the base and the bottom of the lower well chamber.

[0008] Preferably, the first rotating structure includes a first shifting hole, the first shifting hole is connected to the first mounting groove, a first shifting rod is provided on the first clamping ball, the first shifting rod and the first shifting hole are connected by a first spring, and a folded edge is provided at one end of the first shifting rod located inside the lower well chamber for facilitating the shifting of the first shifting rod.

[0009] Preferably, the second rotating structure includes a second shifting hole, the second shifting hole is communicated with the second mounting groove, a second shifting rod is provided on the second clamping ball, and the second shifting rod is connected to the second shifting hole via a second spring.

[0010] Preferably, a positioning groove is provided on the top inner wall of the lower well chamber, and a positioning block matched with the positioning groove is provided on the bottom inner wall of the upper well chamber, and the positioning block is inserted into the positioning groove to position the upper well chamber and the lower well chamber.

[0011] Preferably, a limiting platform is provided at the top of the upper well chamber, a limiting groove matched with the limiting platform is provided on the bottom surface of the cover plate, the limiting platform is inserted in the limiting groove, and a sealing ring is provided between the cover plate and the upper well chamber.

[0012] Preferably, the outer side surface of the limiting platform is an inclined surface which gradually inclines outward from the top to the bottom.

[0013] Preferably, a first annular fixing plate is provided at the top end of the upper well chamber, and a second annular fixing plate is provided at the bottom end of the cover plate, a plurality of screws are evenly arranged on the first fixing plate, a through hole for the screws to pass through is provided on the second fixing plate, and a nut is provided on the screw, and the cover plate and the upper well chamber are locked and fixed by the screws and the nut.

[0014] The construction method of the above-mentioned prefabricated combined assembled inspection well comprises the following steps:

[0015] S1. Excavate the foundation pit, reinforce and protect the side walls of the foundation pit, compact and solidify the bottom of the foundation pit, and lay cushion materials;

[0016] S2. Hoist the base into the foundation pit and fix the base at the bottom of the foundation pit;

[0017] S3, hoist the lower well chamber into the foundation pit, insert the protrusion into the clamp ring through the connecting hole, lower the lower well chamber to the upper surface of the base, the positioning seat is located in the lower well chamber, rotate the lower well chamber to make the protrusion slide into the clamp ring, and connect the lower well chamber to the base;

[0018] S4, hoist the upper well chamber into the foundation pit, align the positioning block of the upper well chamber with the positioning slot and insert it into the positioning slot, and during the downward movement of the second convex plate, the bottom end of the second convex plate applies a thrust to the plane of the first clamping ball, the first clamping ball rotates into the first mounting slot, and the first spring is compressed; the top end of the first convex plate applies a thrust to the plane of the second clamping ball, the second clamping ball rotates into the second mounting slot, and the second spring is compressed; after the second convex plate is inserted into the clamping slot, the first mounting slot is aligned with the second mounting slot, the first clamping ball is inserted into the second clamping slot under the action of the first spring, and the second clamping ball is inserted into the first clamping slot under the action of the second spring, and the upper well chamber and the lower well chamber are locked and fixed;

[0019] S5. Lift the cover plate, put the limit platform of the upper well chamber into the limit groove of the cover plate, pass the screw through the locking hole, and lock the upper well chamber and the cover plate with the nut;

[0020] S6. Backfill soil or pour concrete into the foundation pit, place a manhole cover at the wellhead, and complete the construction of the inspection well.

[0021] The advantages and positive effects of the prefabricated combined assembly inspection well and the construction method thereof described in the present invention are:

[0022] 1. After the protrusion of the base is inserted into the clamping ring of the upper well chamber through the connecting hole, the vertical and horizontal movement of the base and the upper well chamber is restricted, so that the locking installation between the base and the upper well chamber is realized, and the stability of the connection between the upper well chamber and the base is improved.

[0023] 2. The upper well chamber and the lower well chamber are connected by the first clamping ball and the second clamping ball. The first clamping ball and the second clamping ball have a limiting effect on the vertical direction, horizontal direction and rotation direction of the upper well chamber and the lower well chamber, thereby improving the stability of the connection between the upper well chamber and the lower well chamber. In addition, the clamping connection between the first clamping ball and the second clamping ball is easy to install and disassemble.

[0024] 3. A limit platform with an inclined surface is set at the top of the upper well chamber, and the upper well chamber is connected to the cover plate through the limit platform, which is conducive to improving the sealing and positioning effect between the upper well chamber and the cover plate. The upper well chamber and the cover plate are locked by screws and nuts, which improves the stability of the connection between the upper well chamber and the well cover.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a cross-sectional structure of an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the base structure of an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the lower well chamber according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the lower well chamber according to an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the cover plate structure according to an embodiment of the present invention;

[0031] Figure 6 For attachment Figure 1 Middle A enlarged view;

[0032] Figure 7 For attachment Figure 1 Middle B: Enlarged view;

[0033] Figure 8 For attachment Figure 1 Middle C enlarged image.

[0034] Reference numerals

[0035] 1. Base; 2. Lower well chamber; 3. Upper well chamber; 4. Cover plate; 5. Connecting hole; 6. Wellhead; 7. Ladder; 8. Positioning seat; 9. Bump; 10. First convex plate; 11. Slot; 12. First mounting slot; 13. First shift hole; 14. Positioning slot; 15. Positioning block; 16. Snap ring; 17. Connecting hole; 18. Sealing pad; 19. Second convex plate; 20. Second shift hole; 21. First clamping ball; 22. Second clamping ball; 23. First shifting rod; 24. First spring; 25. Second shifting rod; 26. Second spring; 27. Limiting platform; 28. First fixing plate; 29. ​​Screw; 30. Second fixing plate; 31. Locking hole. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Example

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 6As shown. A prefabricated combined assembly inspection well includes a base 1, which is a prefabricated part cast by reinforced concrete. A lower well chamber 2 is arranged above the base 1, and the lower well chamber 2 is a cylindrical prefabricated part cast by reinforced concrete. The lower well chamber 2 is connected to the base 1 by a locking structure. The locking structure includes a positioning seat 8 arranged on the upper surface of the base 1, and the bottom cover of the lower well chamber 2 is arranged outside the positioning seat 8, and the positioning seat 8 is coaxially arranged with the base 1. A protrusion 9 is arranged on the side wall of the positioning seat 8, and the protrusion 9 is an integral structure with the positioning seat 8. A snap ring 16 for snapping the protrusion 9 is arranged on the side wall of the bottom of the lower well chamber 2, and the protrusion 9 is located in the snap ring 16 and is rotatably connected with the snap ring 16. A connecting hole 17 connected to the snap ring 16 is arranged on the bottom surface of the lower well chamber 2, and the protrusion 9 is inserted into the snap ring 16 through the connecting hole 17. In this embodiment, two protrusions 9 are arranged, and the two protrusions 9 are symmetrically arranged on both sides of the positioning seat 8. Two corresponding connecting holes 17 are also provided. After the protrusion 9 is inserted into the retaining ring 16 through the connecting hole 17, the vertical and horizontal movement of the base 1 and the upper well chamber 3 is limited, thereby realizing the locking installation between the base 1 and the upper well chamber 3. In order to limit the rotation between the base 1 and the upper well chamber 3, the base 1 and the upper well chamber 3 can be locked by bolts. The rotational force between the upper well chamber 3 and the base 1 is relatively small, and the use requirements can be met without bolt locking. A sealing gasket 18 is provided between the base 1 and the bottom of the lower well chamber 2 to improve the sealing effect between the base 1 and the lower well chamber 2.

[0040] like Figure 7 As shown. A connecting hole 5 connected to the pipeline is provided on the side wall of the lower well chamber 2. An upper well chamber 3 is provided above the lower well chamber 2, and the upper well chamber 3 is locked and connected with the lower well chamber 2 by a locking member. The locking member includes a first convex plate 10 provided at the top of the lower well chamber 2, and the first convex plate 10 and the lower well chamber 2 are an integral structure. A plurality of hemispherical first mounting grooves 12 are evenly arranged in a circular array on the first convex plate 10. In the present embodiment, there are four first mounting grooves 12. A hemispherical first clamping ball 21 is rotatably arranged in the first mounting groove 12.

[0041] The first convex plate 10 is provided with a first rotating structure for driving the first locking ball 21 to rotate. The first rotating structure includes a first shifting hole 13, and the first shifting hole 13 is connected to the first mounting groove 12. A first shifting rod 23 is fixedly provided on the first locking ball 21, and the first shifting rod 23 and the first shifting hole 13 are connected by a first spring 24. The two ends of the first spring 24 are hinged to the first shifting rod 23 and the first shifting hole 13, respectively. The first spring 24 provides thrust for the first shifting rod 23, so that the bottom end of the first locking ball 21 protrudes from the first mounting groove 12. One end of the first shifting rod 23 located inside the lower well chamber 2 is provided with a folded edge for facilitating the shifting of the first shifting rod 23.

[0042] A second convex plate 19 is provided at the bottom end of the upper well chamber 3, and the second convex plate 19 is located outside the first convex plate 10. The second convex plate 19 is an integral structure with the upper well chamber 3. The inner diameter of the annular second convex plate 19 is slightly larger than the outer diameter of the annular first convex plate 10, so that the second convex plate 19 is just located outside the first convex plate 10. A slot 11 for inserting the second convex plate 19 is provided at the top of the lower well chamber 2. A sealing ring is provided between the second convex plate 19 and the slot 11, and a sealing ring is also provided between the top of the lower well chamber 2 and the inner wall of the bottom end of the upper well chamber 3, so as to improve the sealing effect between the upper well chamber 3 and the lower well chamber 2. A hemispherical second mounting groove is provided on the second convex plate 19, and the second mounting groove corresponds to the first mounting groove 12 one by one. A hemispherical second clamping ball 22 adapted to the first clamping ball 21 is rotatably provided in the second mounting groove, and the diameter of the second clamping ball 22 is equal to the diameter of the first clamping ball 21.

[0043] The second convex plate 19 is provided with a second rotating structure for driving the second locking ball 22 to rotate. The second rotating structure includes a second shifting hole 20, and the second shifting hole 20 is connected to the second mounting groove. A second shifting rod 25 is fixedly provided on the second locking ball 22, and the second shifting rod 25 and the second shifting hole 20 are connected by a second spring 26. The two ends of the second spring 26 are hinged to the second shifting rod 25 and the second shifting hole 20 respectively. The second spring 26 provides thrust for the second shifting rod 25, so that the top end of the second locking ball 22 protrudes from the second mounting groove. One end of the second shifting hole 20 located on the outer wall of the upper well chamber 3 is a blind end, which improves the sealing of the upper well chamber 3.

[0044] The upper well chamber 3 and the lower well chamber 2 are connected by a first locking ball 21 and a second locking ball 22. The first locking ball 21 and the second locking ball 22 have a limiting effect on the vertical, horizontal and rotational directions of the upper well chamber 3 and the lower well chamber 2, thereby improving the stability of the connection between the upper well chamber 3 and the lower well chamber 2.

[0045] A positioning groove 14 is provided on the top inner wall of the lower well chamber 2, and a positioning block 15 adapted to the positioning groove 14 is provided on the bottom inner wall of the upper well chamber 3. The positioning block 15 is inserted into the positioning groove 14 to position the upper well chamber 3 and the lower well chamber 2, so as to facilitate the connection between the upper well chamber 3 and the lower well chamber 2.

[0046] The side walls of the upper well chamber 3 and the lower well chamber 2 are provided with ladders 7 for easy climbing.

[0047] like Figure 4 , Figure 5 , Figure 8As shown. A cover plate 4 is provided on the top of the upper well chamber 3, and a wellhead 6 for installing the well cover is provided on the cover plate 4. A limit platform 27 is provided on the top of the upper well chamber 3, and the limit platform 27 and the upper well chamber 3 are an integral coaxial structure. A limit groove matched with the limit platform 27 is provided on the bottom surface of the cover plate 4, and the limit platform 27 is inserted into the limit groove. The outer side surface of the limit platform 27 is an inclined surface that gradually tilts outward from the top to the bottom, which is convenient for the positioning and installation between the cover plate 4 and the upper well chamber 3, and is also conducive to improving the sealing effect between the upper well chamber 3 and the cover plate 4. A sealing ring is provided between the cover plate 4 and the upper well chamber 3.

[0048] A first annular fixing plate 28 is fixedly provided at the top of the upper well chamber 3, and a second annular fixing plate 30 is fixedly provided at the bottom of the cover plate 4. A plurality of screws 29 are evenly fixedly provided on the first fixing plate 28, and a through hole is provided on the second fixing plate 30 for the screws 29 to pass through. Nuts are provided on the screws 29, and the cover plate 4 and the upper well chamber 3 are locked and fixed by the screws 29 and the nuts.

[0049] The construction method of the above-mentioned prefabricated combined assembled inspection well comprises the following steps:

[0050] S1. Excavate a foundation pit, reinforce and protect the side walls of the foundation pit, compact and solidify the bottom of the foundation pit, lay cushion materials, and pour a concrete platform at the bottom of the foundation pit to improve the stability of the base 1.

[0051] S2. The base 1 is hoisted into the foundation pit and the base 1 is fixed to the bottom of the foundation pit.

[0052] S3. Hoist the lower well chamber 2 into the foundation pit, insert the protrusion 9 into the retaining ring 16 through the connecting hole 17, lower the lower well chamber 2 to the upper surface of the base 1, and position the positioning seat 8 in the lower well chamber 2. Rotate the lower well chamber 2 to make the protrusion 9 slide into the retaining ring 16, and connect the lower well chamber 2 to the base 1.

[0053] S4. The upper well chamber 3 is hoisted into the foundation pit, and the positioning block 15 of the upper well chamber 3 is aligned with the positioning groove 14 and inserted into the positioning groove 14. During the downward movement of the second convex plate 19, the bottom end of the second convex plate 19 applies a thrust to the plane of the first clamping ball 21, and the first clamping ball 21 rotates into the first mounting groove 12, and the first spring 24 is compressed; the top end of the first convex plate 10 applies a thrust to the plane of the second clamping ball 22, and the second clamping ball 22 rotates into the second mounting groove, and the second spring 26 is compressed; after the second convex plate 19 is inserted into the clamping groove 11, the first mounting groove 12 is aligned with the second mounting groove, and the first clamping ball 21 is inserted into the second clamping groove 11 under the action of the first spring 24, and the second clamping ball 22 is inserted into the first clamping groove 11 under the action of the second spring 26, so that the upper well chamber 3 and the lower well chamber 2 are locked and fixed.

[0054] S5, hoist the cover plate 4, put the limit platform 27 of the upper well chamber 3 into the limit groove of the cover plate 4, pass the screw 29 through the locking hole 31, and lock the upper well chamber 3 and the cover plate 4 with the nut.

[0055] S6. Backfill soil or pour concrete into the foundation pit, place a manhole cover at the wellhead 6, and complete the construction of the inspection well.

[0056] Therefore, the use of the prefabricated combined assembled inspection well and the construction method thereof described in the present invention can solve the problem of poor stability of the existing prefabricated inspection well connection structure.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A prefabricated combined inspection well, characterized by: The cam is provided with a locking structure for locking the cam and the locking member is provided with a locking member for locking the cam and the locking member is provided with a second locking member for locking the cam and the locking member is provided with a ...

2. The prefabricated combined inspection well according to claim 1 is characterized in that: The locking structure includes a positioning seat arranged on the upper surface of the base, the bottom cover of the lower well chamber is arranged outside the positioning seat, the positioning seat and the base are coaxially arranged as a whole, a protrusion is arranged on the side wall of the positioning seat, and a clamping ring for clamping the protrusion is arranged on the bottom side wall of the lower well chamber. The protrusion is located in the clamping ring and is rotatably connected to the clamping ring. A connecting hole connected to the clamping ring is arranged on the bottom surface of the lower well chamber, and the protrusion is inserted into the clamping ring through the connecting hole.

3. The prefabricated combined inspection well according to claim 2 is characterized in that: A sealing gasket is arranged between the base and the bottom of the lower well chamber.

4. The prefabricated combined inspection well according to claim 3 is characterized in that: The first rotating structure includes a first shifting hole, which is connected to the first mounting groove. A first shifting rod is arranged on the first clamping ball. The first shifting rod and the first shifting hole are connected by a first spring. A folded edge is arranged at one end of the first shifting rod located inside the lower well chamber for facilitating the shifting of the first shifting rod.

5. The prefabricated combined inspection well according to claim 4 is characterized in that: The second rotating structure includes a second shifting hole, the second shifting hole is communicated with the second mounting groove, a second shifting rod is arranged on the second clamping ball, and the second shifting rod is connected to the second shifting hole through a second spring.

6. The prefabricated combined inspection well according to claim 5 is characterized in that: A positioning groove is arranged on the top inner wall of the lower well chamber, and a positioning block matched with the positioning groove is arranged on the bottom inner wall of the upper well chamber. The positioning block is inserted into the positioning groove to position the upper well chamber and the lower well chamber.

7. The prefabricated combined inspection well according to claim 6 is characterized in that: A limiting platform is arranged at the top of the upper well chamber, a limiting groove matched with the limiting platform is arranged on the bottom surface of the cover plate, the limiting platform is inserted in the limiting groove, and a sealing ring is arranged between the cover plate and the upper well chamber.

8. The prefabricated combined inspection well according to claim 7 is characterized in that: The outer side surface of the limiting platform is a slope that gradually tilts outward from the top to the bottom.

9. The prefabricated combined inspection well according to claim 8, characterized in that: A first annular fixing plate is arranged at the top end of the upper well chamber, and a second annular fixing plate is arranged at the bottom end of the cover plate. A plurality of screws are evenly arranged on the first fixing plate, and a through hole for the screws to pass through is arranged on the second fixing plate. Nuts are arranged on the screws, and the cover plate and the upper well chamber are locked and fixed by the screws and the nuts.

10. A construction method for a prefabricated combined assembly inspection well as claimed in claim 9, characterized in that: The following steps are involved: S1. Excavate the foundation pit, reinforce and protect the side walls of the foundation pit, compact and solidify the bottom of the foundation pit, and lay cushion materials; S2. Hoist the base into the foundation pit and fix the base at the bottom of the foundation pit; S3, hoist the lower well chamber into the foundation pit, insert the protrusion into the clamp ring through the connecting hole, lower the lower well chamber to the upper surface of the base, the positioning seat is located in the lower well chamber, rotate the lower well chamber to make the protrusion slide into the clamp ring, and connect the lower well chamber to the base; S4, hoist the upper well chamber into the foundation pit, align the positioning block of the upper well chamber with the positioning slot and insert it into the positioning slot, and during the downward movement of the second convex plate, the bottom end of the second convex plate applies a thrust to the plane of the first clamping ball, the first clamping ball rotates into the first mounting slot, and the first spring is compressed; the top end of the first convex plate applies a thrust to the plane of the second clamping ball, the second clamping ball rotates into the second mounting slot, and the second spring is compressed; after the second convex plate is inserted into the clamping slot, the first mounting slot is aligned with the second mounting slot, the first clamping ball is inserted into the second clamping slot under the action of the first spring, and the second clamping ball is inserted into the first clamping slot under the action of the second spring, and the upper well chamber and the lower well chamber are locked and fixed; S5. Lift the cover plate, put the limit platform of the upper well chamber into the limit groove of the cover plate, pass the screw through the locking hole, and lock the upper well chamber and the cover plate with the nut; S6. Backfill soil or pour concrete into the foundation pit, place a manhole cover at the wellhead, and complete the construction of the inspection well.

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