A prefabricated water supply and drainage inspection well splicing structure and its construction method

Abstract

This invention belongs to the technical field of inspection well structures, and particularly relates to a prefabricated water supply and drainage inspection well splicing structure and its construction method. This invention provides a prefabricated water supply and drainage inspection well splicing structure, which, by setting an upper well wall panel unit, a vertical connecting pipe unit, a cast-in-place connecting plate, and an opening cover plate on the lower well wall unit, achieves the following: 1. The upper and lower splicing structures of the well wall have sufficient and suitable connection strength, and the splicing operation is simple and convenient; 2. The lower well wall unit and the upper well wall panel unit together fix the pipeline, making the pipeline installation function of the inspection well foundation stable and effective. Furthermore, this invention also provides a construction method for the above-mentioned inspection well.

Description

Technical Field

[0001] This invention belongs to the field of inspection well structure technology, and particularly relates to a prefabricated water supply and drainage inspection well splicing structure and its construction method. Background Technology

[0002] A water supply and drainage inspection well refers to an inspection well through which water supply and drainage pipes pass. The term "prefabricated" indicates that the inspection well's structure includes prefabricated components that are directly assembled later, or with a small amount of on-site casting, the entire inspection well is then completed.

[0003] The advantages of prefabricated manholes are that the amount of work involved in the on-site casting operation is relatively small and the construction period is relatively short. However, the core of the structure of prefabricated manholes is the splicing and connection parts, which are more prone to deformation, damage and disintegration compared to prefabricated parts.

[0004] On the other hand, the installation and use requirements of prefabricated inspection wells must ensure both considerable ease of installation and sufficient airtightness and connection strength of the structure itself.

[0005] Chinese utility model patent with patent publication number CN213143324U and publication date of May 7, 2021 discloses an assembled municipal water supply and drainage inspection well, the structure of which includes a first well shaft, a second well shaft, an upper connecting plate, a lower connecting plate, a fixing plate, and a connecting spring.

[0006] The water supply and drainage inspection well in this utility model patent is generally installed and used as follows: the top of the first well shaft and the second well shaft are movably connected; an upper connecting plate is fixedly installed on the bottom side of the first well shaft; a lower connecting plate is fixedly connected to the bottom side of the second well shaft; a vertical groove is opened on the top of the lower connecting plate; a fixing plate is slidably installed in the vertical groove; a connecting groove is opened on the bottom of the upper connecting plate; the fixing plate is movably connected to the connecting groove; and one end of a connecting spring is fixedly connected to the bottom of the fixing plate.

[0007] However, even after the water supply and drainage inspection well is assembled and installed, it still has at least two shortcomings. In other words, these are the technical problems that this invention aims to solve.

[0008] The first and second shafts are only fixed by plug-in plates and sleeves, and by upper and lower connecting plates. This fixing strength is far from sufficient, and the two shafts are prone to misalignment and separation.

[0009] Secondly, the first and second shafts lack prefabricated installation holes for water supply and drainage pipes, which will need to be added later, which is very troublesome.

[0010] Therefore, in summary, there is an urgent need for a new type of prefabricated water supply and drainage inspection well facility with a reasonable prefabricated component structure, high connection strength between prefabricated components, and relatively simple and convenient connection operation. Summary of the Invention

[0011] This invention provides a prefabricated water supply and drainage inspection well splicing structure. By setting an upper well wall panel unit, a vertical connecting pipe unit, a cast-in-place connecting plate, and an opening cover plate on the lower well wall unit, it achieves the following: 1. Sufficient and suitable connection strength in the upper and lower splicing structure of the well wall, and simple and convenient splicing operation; 2. The lower well wall unit and the upper well wall panel unit together fix the pipeline, making the pipeline installation function of the inspection well foundation stable and effective. Furthermore, this invention also provides a construction method for the above-mentioned inspection well.

[0012] The technical solution adopted by the present invention to solve the above problems is: a prefabricated water supply and drainage inspection well splicing structure, including an opening cover plate, a lower well wall unit for locking and placing pipes, four upper well wall plate units set on the lower well wall unit with an L-shaped transverse cross section and used for locking and pressing down pipes, vertical connecting pipe units set on the lower well wall unit and the upper well wall plate units, and cast-in-place connecting plates set on two adjacent upper well wall plate units.

[0013] A further preferred technical solution is that the lower well wall unit includes a rectangular frame, two lower arc-shaped openings disposed on two symmetrical side plates of the rectangular frame for engaging and placing pipes, and a lower reinforcing bar disposed within the rectangular frame and protruding at the upper end for installing the vertical connecting pipe unit.

[0014] A further preferred technical solution is that the lower well wall unit also includes a bottom plate disposed on the lower surface of the rectangular frame, and a sealing layer is provided on the lower arc-shaped opening.

[0015] A further preferred technical solution is that: the upper well wall panel unit includes a plate with an L-shaped transverse cross-section, an upper arc-shaped opening disposed on the side and bottom surface of one side of the plate for engaging the lower pressure pipe, a side arc-shaped opening disposed on the side surface of the other side of the plate for forming an inspection hole, horizontal reinforcing bars disposed on the side surfaces of both sides of the plate for connecting the cast-in-place connecting plate, and an upper reinforcing bar disposed within the plate and protruding at its lower end for installing the vertical connecting pipe unit.

[0016] A further preferred technical solution is that the upper well wall panel unit also includes an outer groove disposed on the outer side and bottom surface of the panel, which is used to expose the outer side of the upper reinforcing bar.

[0017] A further preferred technical solution is that: the horizontal reinforcing bars are located above the upper arc-shaped opening and on the upper and lower sides of the side arc-shaped opening; the number of the upper reinforcing bars on one side of the side arc-shaped opening is greater than the number of the upper reinforcing bars on the side of the upper arc-shaped opening.

[0018] A further preferred technical solution is that the vertical connecting pipe unit includes a steel sleeve disposed on the lower and upper steel bars, a concrete inlet / outlet hole disposed on the steel sleeve, and a dense concrete block disposed inside the steel sleeve.

[0019] A further preferred technical solution is that the vertical connecting pipe unit further includes two rings disposed on the inner annular surface of the reinforcing bar sleeve and used for welding the lower reinforcing bar and the upper reinforcing bar respectively, and a weld seam disposed on the rings and formed by extending the welding gun through the concrete inlet and outlet hole.

[0020] A further preferred technical solution is that the width of the cast-in-place connecting plate is 5-10cm, and the two adjacent transverse reinforcing bars are staggered vertically.

[0021] A construction method for a prefabricated water supply and drainage inspection well assembly structure includes the following steps:

[0022] S1. Prefabricate the opening cover plate, the lower well wall unit, and the upper well wall unit;

[0023] S2. First, hoist and place the lower well wall unit, then install pipes and vertical connecting pipe units on the lower well wall unit, and finally hoist and place 4 upper well wall units in sequence, so that the vertical connecting pipe units connect the lower well wall unit and the upper well wall unit at the same time.

[0024] S3. Cast the cast-in-place connecting plate to fix the four upper well wall panel units;

[0025] S4. Place the opening cover plate on the upper well wall panel unit, and the entire prefabricated water supply and drainage inspection well is now fully constructed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the lower wellbore unit in this invention.

[0028] Figure 3 This is a schematic diagram of the upper wellbore wall unit in this invention, viewed from a top-down angle.

[0029] Figure 4 This is a schematic diagram showing the position and shape of the upper reinforcing bar in this invention.

[0030] Figure 5 This is a schematic diagram of the position and structure of the vertical connecting pipe unit in this invention.

[0031] Figure 6 This is a schematic diagram showing the position and shape of the outer groove in this invention.

[0032] Figure 7 This is a schematic diagram showing the position and shape of the cast-in-place connecting plate in this invention.

[0033] In the attached diagram, the meanings of each number are as follows:

[0034] Pipe a, centerline of cast-in-place connection slab b;

[0035] 1. Opening cover plate; 2. Lower well wall unit; 3. Upper well wall unit; 4. Vertical connecting pipe unit; 5. Cast-in-place connecting plate; 6. Sealing layer.

[0036] 201 Rectangular frame, 202 Lower arc-shaped opening, 203 Lower reinforcing bar, 204 Base plate, 301 Plate, 302 Upper arc-shaped opening, 303 Side arc-shaped opening, 304 Horizontal reinforcing bar, 305 Upper reinforcing bar, 306 Outer groove, 401 Reinforcing bar sleeve, 402 Concrete inlet / outlet hole, 403 Dense concrete block, 404 Circular ring, 405 Weld. Detailed Implementation

[0037] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0038] As attached Figure 1-7 As shown, a prefabricated water supply and drainage inspection well splicing structure includes an opening cover plate 1, a lower well wall unit 2 for engaging and placing pipe a, four upper well wall plate units 3 arranged on the lower well wall unit 2 with an L-shaped transverse cross section for engaging and engaging the lower pressurized pipe a, a vertical connecting pipe unit 4 arranged on the lower well wall unit 2 and the upper well wall plate units 3, and a cast-in-place connecting plate 5 arranged on two adjacent upper well wall plate units 3.

[0039] In this embodiment, the cross-sectional outer contour of the inspection well is square or rectangular. Therefore, the dimensions of the four upper well wall panel units 3 do not need to be completely consistent. The upper well wall of the inspection well is "divided into four" in order to balance the prefabrication degree of the inspection well. Otherwise, if the prefabrication degree is too high, the transportation cost and safety difficulty will increase.

[0040] In addition, there are 4 cast-in-place connecting plates 5, corresponding to 4 spliced ​​upper well wall panel units 3.

[0041] The lower well wall unit 2 includes a rectangular frame 201, two lower arc-shaped openings 202 disposed on two symmetrical side plates of the rectangular frame 201 and used to engage and install the pipe a, and a lower reinforcing bar 203 disposed inside the rectangular frame 201 and protruding at the upper end for installing the vertical connecting pipe unit 4.

[0042] In this embodiment, the material of the lower well wall unit 2 is reinforced concrete, and the lower steel bar 203 can be a single dedicated steel bar, or a protruding part of the steel mesh cage of the rectangular frame 201 itself.

[0043] Furthermore, the central angle of the lower arc-shaped opening 202 is less than or equal to 180°, ensuring that pipe a can be smoothly inserted, while the remaining "degrees" are provided by the two upper well wall plate units 3, ensuring that pipe a is not easily displaced in the inspection well.

[0044] The lower well wall unit 2 also includes a bottom plate 204 disposed on the lower surface of the rectangular frame 201, and a sealing layer 6 is provided on the lower arc-shaped opening 202.

[0045] In this embodiment, pipe a has two structural types: closed and open. The latter is a disconnected pipe that will accumulate water in the inspection well for a long time. Therefore, the sealing layer 6 is first applied to the lower arc-shaped opening 202, and then applied to the corresponding exposed part of pipe a. Finally, the upper well wall panel unit 3 is installed and snapped off to ensure that the insertion structure of the open type pipe a in the inspection well has a sufficient and suitable sealing effect.

[0046] The sealing layer 6 is made of existing epoxy resin or epoxy mortar. Of course, when pipe a is closed, the inspection well is only used to expose various pipe instruments and equipment for easy reading and adjustment. In this case, the sealing layer 6 is not necessary; it is sufficient to ensure that the lower arc-shaped opening 202 and the upper well wall unit 3 fully fix pipe a.

[0047] The upper well wall panel unit 3 includes a plate 301 with an L-shaped transverse cross section, an upper arc-shaped opening 302 located on one side and bottom of the plate 301 for engaging the lower pressure pipe a, a side arc-shaped opening 303 located on the other side of the plate 301 for forming an inspection hole, horizontal reinforcing bars 304 located on the sides of the plate 301 for connecting the cast-in-place connecting plate 5, and an upper reinforcing bar 305 located inside the plate 301 with its lower end protruding for installing the vertical connecting pipe unit 4.

[0048] In this embodiment, the lower arc-shaped opening 202, the two upper arc-shaped openings 302, and the arc-shaped area corresponding to the lower surface of the cast-in-place connecting plate 5 together constitute a complete 360°.

[0049] The upper surface of the plate 301 is used to place the opening cover plate 1, and the lower surface is aligned with or even attached to the rectangular frame 201. Finally, they are connected and fixed from top to bottom by the vertical connecting pipe unit 4.

[0050] In addition, in the existing technology, inspection holes, also known as engineering holes, are used to detect and ascertain the structure and stability of the soil and rock layers next to the inspection well, as well as the thickness, depth, permeability and flow rate of the aquifer, and to assist the pipeline inspection function of the inspection well.

[0051] Therefore, the width of the cast-in-place connecting plate 5 at the inspection hole is smaller than that of the cast-in-place connecting plate 5 at pipe a. The former is also a circular hole, but its size is much smaller than the circular hole used for pipe a installation. For example, the central angle of the upper arc-shaped opening 302 is 80° and the central angle of the side arc-shaped opening 303 is 170°.

[0052] The upper well wall panel unit 3 also includes an outer groove 306 disposed on the outer side and bottom surface of the plate body 301, which is used to expose the upper reinforcing bar 305.

[0053] In this embodiment, if pipe a is closed, the outer groove 306 does not need to be set, the upper steel bar 305 protrudes directly on the bottom surface of plate 301, and the inspection well has an appropriate number and size of openings at the height of the vertical connecting pipe unit 4, which does not affect the basic use effect of the inspection well.

[0054] When pipe a is open, meaning the two pipe sections are inserted into two separate holes, the outer groove 306 must be provided. This means the vertical connecting pipe unit 4 is located outside the plate 301, and the inner part of the bottom surface of the plate 301 is joined to form a closed frame, which connects to the rectangular frame 201. Furthermore, the sealing layer 6 is also provided on the lower surface of the plate 301 or the upper surface of the rectangular frame 201.

[0055] The horizontal reinforcing bars 304 are positioned above the upper arc-shaped opening 302 and on the upper and lower sides of the side arc-shaped opening 303; the number of upper reinforcing bars 305 on one side of the side arc-shaped opening 303 is greater than the number of upper reinforcing bars 305 on one side of the upper arc-shaped opening 302.

[0056] In this embodiment, the upper arc-shaped opening 302 is positioned lower and the side arc-shaped opening 303 is positioned in the center. Therefore, the former only requires the upper section of the cast-in-place connecting plate 5, while the latter requires both the upper and lower sections of the cast-in-place connecting plate 5.

[0057] Furthermore, the diameter of the upper arc-shaped opening 302 is much larger than that of the side arc-shaped opening 303. Therefore, the bottom surface size of the plate 301 on one side of the upper arc-shaped opening 302 is relatively small. Consequently, the number of upper reinforcing bars 305 on one side of the upper arc-shaped opening 302 is also relatively small, or even non-existent, i.e., the number is 0.

[0058] The vertical connecting pipe unit 4 includes a steel sleeve 401 disposed on the lower steel bar 203 and the upper steel bar 305, a concrete inlet / outlet hole 402 disposed on the steel sleeve 401, and a dense concrete block 403 disposed inside the steel sleeve 401.

[0059] In this embodiment, the steel bar sleeve 401 is made of steel and is shaped as a vertical tube. It has two horizontal channels, one above the other, which are the two concrete inlet and outlet holes 402. The steel bar sleeve 401 is first fixed to the lower steel bar 203 and the upper steel bar 305, and then compacted with concrete to form the compacted concrete block 403, ensuring that the connection strength of the vertical connecting pipe unit 4 to the lower well wall unit 2 and the upper well wall panel unit 3 is sufficient.

[0060] When the dense concrete block 403 is poured, it flows from bottom to top until concrete flows out of the concrete inlet / outlet hole 402 at the top.

[0061] The vertical connecting pipe unit 4 also includes two rings 404 disposed on the inner ring surface of the steel sleeve 401 and used for welding the lower steel bar 203 and the upper steel bar 305 respectively, and a weld 405 disposed on the rings 404 and formed by extending the welding gun through the concrete inlet / outlet hole 402.

[0062] In this embodiment, the ring 404 and the steel bar sleeve 401 are integrally formed. The former has a smaller inner diameter and can be welded to the lower steel bar 203 and the upper steel bar 305. The latter is the outer shell of the dense concrete block 403 and the connecting sleeve of the ring 404, which ensures that the vertical connecting pipe unit 4 combines the welding effect and the concrete fixing effect, and the entire connection structure has greater strength.

[0063] In addition, the size of the concrete inlet / outlet hole 402 is relatively large compared to the welding gun, ensuring that the welding gun can be fully welded to form the weld 405 after it is inserted. At this time, the weld 405 does not need to be, and cannot be, a complete circle; stable welding is sufficient.

[0064] The width of the cast-in-place connecting plate 5 is 5-10cm, and the two adjacent horizontal reinforcing bars 304 are staggered vertically.

[0065] In this embodiment, the protruding length of the horizontal reinforcing bar 304 is appropriately large, and the horizontal reinforcing bars 304 on both sides are of different heights, ensuring that the adjacent upper well wall panel units 3 can be sufficiently staggered during casting, and the reinforcing bar tie strength is sufficient.

[0066] A construction method for a prefabricated water supply and drainage inspection well assembly structure includes the following steps:

[0067] S1. Prefabricate the opening cover plate 1, the lower well wall unit 2, and the upper well wall unit 3;

[0068] S2. First, hoist and place the lower well wall unit 2, then install pipe a and vertical connecting pipe unit 4 on the lower well wall unit 2, and finally hoist and place 4 upper well wall panel units 3 in sequence, so that the vertical connecting pipe unit 4 connects the lower well wall unit 2 and the upper well wall panel unit 3 at the same time.

[0069] S3. Cast the cast-in-place connecting plate 5 to fix and connect the four upper well wall panel units 3.

[0070] S4. Place the opening cover plate 1 on the upper well wall panel unit 3, and the entire prefabricated water supply and drainage inspection well is completed.

[0071] In this embodiment, the opening cover plate 1, the lower well wall unit 2, and the upper well wall panel unit 3 are all reinforced concrete structures. When the cast-in-place connecting plate 5 is poured, clamps are needed on both the inner and outer sides to prevent a large amount of concrete from spilling. The opening cover plate 1 includes the existing and necessary manhole structure and well cover structure.

[0072] Finally, the advantages of the prefabricated water supply and drainage inspection well in this embodiment are summarized as follows.

[0073] The first and fourth upper well wall panel units 3 are connected and fixed by the cast-in-place connecting plate 5, and the upper well wall panel unit 3 and the lower well wall unit 2 are fixed by the vertical connecting pipe unit 4, ensuring that the prefabricated inspection well has sufficient structural strength and stability, and the assembly and splicing operation is relatively easy.

[0074] Secondly, the upper well wall plate unit 3 and the lower well wall unit 2 can fully fix the pipeline a and prevent the pipeline a from shifting.

[0075] Third, when pipe a is open, the prefabricated inspection well can also provide sufficient and appropriate sealing to avoid a large amount of water leakage at the inspection well.

[0076] Fourth, the cast-in-place connecting plate 5 is used to fix the two adjacent sets of horizontal reinforcing bars 304. The amount of casting work is relatively small, but the fixing strength is sufficient.

[0077] Fifth, the vertical connecting pipe unit 4 is connected by welding and concrete to ensure that the lower steel bar 203 and the upper steel bar 305, that is, the upper and lower parts of the entire inspection well, can be fully spliced ​​and fixed, with sufficient structural stability. Moreover, the operation of welding first and then connecting tightly is simple, convenient, efficient and orderly.

[0078] Sixth, the outer groove 306 ensures that the lower surface of the plate 301 fits the upper surface of the rectangular frame 201, so that the inspection well has sufficient sealing. At this time, the pipe a is open and is used in conjunction with the sealing layer 6.

[0079] Seventh, the construction method of this inspection well is relatively simple and efficient, the amount of cast-in-place work is relatively small, and the structural strength and sealing performance of the inspection well are sufficient.

[0080] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A prefabricated water supply and drainage inspection well splicing structure, including an opening cover plate (1), characterized in that: It also includes a lower well wall unit (2) for engaging and placing the pipe (a), four upper well wall plate units (3) set on the lower well wall unit (2) with an L-shaped transverse cross section and used for engaging and pressing the pipe (a), vertical connecting pipe units (4) set on the lower well wall unit (2) and the upper well wall plate units (3), and cast-in-place connecting plates (5) set on two adjacent upper well wall plate units (3). The lower well wall unit (2) includes a rectangular frame (201), two lower arc-shaped openings (202) set on the two symmetrical side plates of the rectangular frame (201) and used to fit the pipe (a), and a lower reinforcing bar (203) set inside the rectangular frame (201) and protruding at the upper end for installing the vertical connecting pipe unit (4). The upper well wall panel unit (3) includes a plate (301) with an L-shaped transverse cross section, an upper arc-shaped opening (302) provided on the side and bottom of one side of the plate (301) for engaging the lower pressure pipe (a), a side arc-shaped opening (303) provided on the side of the other side of the plate (301) for forming an inspection hole, horizontal reinforcing bars (304) provided on the side of both sides of the plate (301) for connecting the cast-in-place connecting plate (5), and an upper reinforcing bar (305) provided inside the plate (301) with its lower end protruding for installing the vertical connecting pipe unit (4). The vertical connecting pipe unit (4) includes a steel sleeve (401) provided on the lower steel bar (203) and the upper steel bar (305), a concrete inlet and outlet hole (402) provided on the steel sleeve (401), and a dense concrete block (403) provided in the steel sleeve (401).

2. The prefabricated water supply and drainage inspection well splicing structure according to claim 1, characterized in that: The lower well wall unit (2) also includes a bottom plate (204) disposed on the lower surface of the rectangular frame (201), and a sealing layer (6) is provided on the lower arc-shaped opening (202).

3. The prefabricated water supply and drainage inspection well splicing structure according to claim 1, characterized in that: The upper well wall panel unit (3) also includes an outer groove (306) provided on the outer side and bottom surface of the plate (301) for exposing the upper reinforcing bar (305).

4. The prefabricated water supply and drainage inspection well splicing structure according to claim 1, characterized in that: The horizontal reinforcing bars (304) are located above the upper arc-shaped opening (302) and on the upper and lower sides of the side arc-shaped opening (303); the number of the upper reinforcing bars (305) on one side of the side arc-shaped opening (303) is greater than the number of the upper reinforcing bars (305) on one side of the upper arc-shaped opening (302).

5. The prefabricated water supply and drainage inspection well splicing structure according to claim 1, characterized in that: The vertical connecting pipe unit (4) also includes two rings (404) disposed on the inner ring surface of the steel sleeve (401) and used for welding the lower steel bar (203) and the upper steel bar (305) respectively, and a weld (405) disposed on the rings (404) and formed by extending the welding gun through the concrete inlet / outlet hole (402).

6. The prefabricated water supply and drainage inspection well splicing structure according to claim 1, characterized in that: The width of the cast-in-place connecting plate (5) is 5-10cm, and the two adjacent horizontal reinforcing bars (304) are staggered vertically.

7. A construction method for the prefabricated water supply and drainage inspection well splicing structure as described in claim 1, characterized in that... The steps are as follows: S1. Prefabricate the opening cover plate (1), the lower well wall unit (2), and the upper well wall unit (3); S2. First, hoist and place the lower well wall unit (2), then install the pipe (a) and the vertical connecting pipe unit (4) on the lower well wall unit (2), and finally hoist and place 4 upper well wall units (3) in sequence, so that the vertical connecting pipe unit (4) connects the lower well wall unit (2) and the upper well wall unit (3) at the same time. S3. Cast the cast-in-place connecting plate (5) to fix the four upper well wall panel units (3). S4. Place the opening cover plate (1) on the upper well wall panel unit (3), and the entire prefabricated water supply and drainage inspection well is completed.

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