Sewer inspection chamber

Abstract

This application relates to the field of sewage well structural design technology, and in particular to a sewage inspection well, comprising a crushed stone foundation layer, a backfill stone chip layer, and a well cylinder. The backfill stone chip layer is laid on the crushed stone foundation layer, and the well cylinder is vertically installed within the backfill stone chip layer. A crushed stone pad layer and a concrete layer are sequentially laid on the crushed stone foundation layer. A sheath is installed on the outer peripheral wall of the top of the well cylinder. A gap is left between the inner peripheral wall of the sheath and the outer peripheral wall of the well cylinder, and the gap is filled with a polyurethane sealant layer. A metal reinforcement is also provided between the sheath and the outer peripheral wall of the well cylinder. Some parts of the metal reinforcement penetrate through the bottom of the sheath and extend into the crushed stone pad layer. An inner cover can be detachably installed on the top of the well cylinder. The sewage inspection well of this application, by adding a polyurethane sealant layer and metal reinforcement, makes the connection between the sheath and the well cylinder more secure.

Description

Technical Field

[0001] This application relates to the field of sewage well structural design technology, and in particular to a sewage inspection well. Background Technology

[0002] Sewage inspection wells are ubiquitous in residential areas, public buildings, and factories. They are typically located at intersections, bends, changes in pipe diameter or slope, and drop structures of drainage pipes to facilitate regular inspections, cleaning, dredging, and inspections by entering the wells.

[0003] For example, Chinese patent application number CN201420348260.3 discloses a plastic inspection well with a protective cover, including an injection-molded plastic well base, a vertical connecting pipe and a horizontal connecting pipe on the plastic well base, a plastic well cylinder installed on the vertical connecting pipe, and a buried drainage and sewage pipe connected to the horizontal connecting pipe. A non-protective well cover is installed at the upper opening of the plastic well cylinder, a protective sleeve is installed on the outer wall of the upper opening of the plastic well cylinder, a concrete base layer and a gravel cushion layer are set outside the protective sleeve, a well ring is set on the gravel cushion layer, and a protective well cover is installed in the well ring.

[0004] Regarding the aforementioned related technologies, the inventors believe that the following defects exist:

[0005] In actual use, common inspection wells inevitably encounter situations such as slight ground subsidence or pressure from large vehicles, which can easily cause vertical relative displacement between the well casing and the protective sleeve. This not only makes the inner cover installed on the top of the well casing prone to loosening, but also damages the structural integrity of the entire inspection well, resulting in a short service life and frequent maintenance and repair work. Summary of the Invention

[0006] This application provides a sewage inspection well to improve the following technical problems:

[0007] Vertical relative displacement can easily occur between the shaft and the casing of a common inspection well. This can not only cause the inner cover installed on the top of the shaft to loosen, but also damage the structural integrity of the entire inspection well.

[0008] This application provides a sewage inspection well, which adopts the following technical solution:

[0009] A sewage inspection well includes a crushed stone base layer, a backfill stone chip layer, and a well shaft. The backfill stone chip layer is laid on the crushed stone base layer, and the well shaft is vertically installed within the backfill stone chip layer. A crushed stone pad layer and a concrete layer are sequentially laid on the crushed stone base layer. A sheath is provided on the outer peripheral wall of the top of the well shaft. A gap is left between the inner peripheral wall of the sheath and the outer peripheral wall of the well shaft, and the gap is filled with a polyurethane mortar layer. A metal reinforcement is also provided between the sheath and the outer peripheral wall of the well shaft. Some parts of the metal reinforcement penetrate the bottom of the sheath and extend into the crushed stone pad layer. An inner cover can be detachably installed on the top of the well shaft.

[0010] In one feasible technical solution of this application, the metal reinforcement includes a ring, a plurality of fixing bolts and a plurality of anchor rods. The fixing bolts are threaded through the ring, the ring is sleeved on the outer peripheral wall of the wellbore and locked by the fixing bolts, the anchor rods are arranged laterally and the main body is located in the crushed stone pad layer, the inner end of the anchor rod penetrates the bottom of the sheath and is threaded onto the ring, and the anchor rod is perpendicular to the ring.

[0011] In one feasible technical solution of this application, the number of the anchor rods is between 3 and 10, the number of the fixing bolts is between 4 and 8, and the fixing bolts are located between adjacent anchor rods.

[0012] In one feasible technical solution of this application, a threaded sleeve is provided on the outer peripheral wall of the ring, and the inner end of the rebar rod is threadedly assembled in the threaded sleeve.

[0013] In one feasible technical solution of this application, the metal reinforcement is a stainless steel part, and the length of the rebar extending into the crushed stone pad layer is between 50 and 100 centimeters.

[0014] In one feasible technical solution of this application, the inner cover has an integrally formed annular mesh basket arranged downwards in the middle, and the bottom surface of the inner cover is provided with an inner ring that abuts against the inner peripheral wall of the well barrel.

[0015] In one feasible technical solution of this application, a concrete annular base is further provided on the concrete layer, and an outer well ring and an inner well seat are fixed on the concrete annular base. Both the outer well ring and the inner well seat are annular structures and cast iron parts, and a steel fiber reinforced concrete well cover is assembled in the inner well seat.

[0016] In one feasible technical solution of this application, a concrete filling ring is further provided in the gap between the outer well ring and the inner well seat, and the cross-section of the concrete filling ring is a right triangle.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] By adding a polyurethane sealant layer and metal reinforcements, the connection between the casing and the wellbore is made more robust, reducing the adverse effects of ground subsidence or large vehicles pressing down on the casing. As a result, the inner cover at the top of the wellbore is less likely to loosen or shake, making the entire inspection well more structurally robust, extending its service life, reducing the frequency of maintenance and repairs after use, lowering operating costs, and enhancing practicality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a sewage inspection well according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the structure of the metal reinforcement component in the embodiments of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Crushed stone foundation layer; 2. Backfill stone chip layer; 3. Well shaft; 4. Crushed stone pad layer; 5. Concrete layer; 6. Sheath pipe; 7. Polyurethane mortar layer; 8. Metal reinforcement components; 81. Circular ring; 82. Fixing bolt; 83. Rebar rod; 84. Threaded sleeve; 9. Inner cover; 91. Circular mesh basket; 92. Inner ring; 10. Concrete annular base; 11. Outer well ring; 12. Inner well seat; 13. Steel fiber reinforced concrete well cover; 14. Concrete filling ring. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0029] This application discloses a sewage inspection well. (Refer to...) Figure 1-2 The sewage inspection well includes a crushed stone foundation layer 1, a backfill stone chip layer 2, and a well shaft 3. The backfill stone chip layer 2 is laid on the crushed stone foundation layer 1, and the well shaft 3 is installed vertically inside the backfill stone chip layer 2. A crushed stone pad layer 4 and a concrete layer 5 are laid sequentially on the crushed stone foundation layer 1. A sheath pipe 6 is installed on the outer peripheral wall of the top of the well shaft 3. A gap is left between the inner peripheral wall of the sheath pipe 6 and the outer peripheral wall of the well shaft 3, and the gap is filled with a polyurethane mortar layer 7. A metal reinforcement 8 is also installed between the sheath pipe 6 and the outer peripheral wall of the well shaft 3. Some parts of the metal reinforcement 8 penetrate through the bottom of the sheath pipe 6 and extend into the crushed stone pad layer 4. An inner cover 9 can also be detached and installed on the top of the well shaft 3.

[0030] The concrete layer 5 is also provided with a concrete annular base 10. An outer well ring 11 and an inner well seat 12 are fixed on the concrete annular base 10. Both the outer well ring 11 and the inner well seat 12 are annular structures and cast iron parts. A steel fiber reinforced concrete well cover 13 is installed in the inner well seat 12. A concrete filling ring 14 is also provided in the gap between the outer well ring 11 and the inner well seat 12. The cross-section of the concrete filling ring 14 is a right triangle. The design of the concrete filling ring 14 significantly improves the support strength between the outer well ring 11 and the inner well seat 12, so that the outer well ring 11 and the inner well seat 12 are not easily bent and deformed under strong pressure.

[0031] The thickness of the crushed stone base layer 1 is between 140-160 cm, the thickness of the crushed stone cushion layer 4 is between 8-12 cm, the thickness of the concrete layer 5 is between 12-20 cm, the height of the sheath pipe 6 is between 25-50 cm, and the thickness of the polyurethane mortar layer 7 is between 1-2 cm.

[0032] In this embodiment, the metal reinforcement component 8 includes a ring 81, multiple fixing bolts 82, and multiple anchor rods 83. The fixing bolts 82 are threaded through the ring 81. The ring 81 is sleeved on the outer peripheral wall of the wellbore 3 and locked by the fixing bolts 82. The anchor rods 83 are arranged laterally and their main bodies are located in the gravel cushion layer 4. The inner end of the anchor rod 83 penetrates the bottom of the sheath tube 6 and is threaded onto the ring 81. The anchor rod 83 is perpendicular to the ring 81.

[0033] Specifically, the number of anchor rods 83 is between 3 and 10, and the number of fixing bolts 82 is between 4 and 8. The fixing bolts 82 are located between adjacent anchor rods 83. In this embodiment, there are 6 sets of anchor rods 83 and fixing bolts 82 respectively. In order to facilitate the connection and fixing of anchor rods, a threaded sleeve 84 is provided on the outer peripheral wall of the ring 81. The inner end thread of the anchor rod 83 is fitted into the threaded sleeve 84. The metal reinforcement part 8 is a stainless steel part. The length of the anchor rod 83 extending into the crushed stone cushion layer 4 is between 50 and 100 centimeters.

[0034] The metal reinforcement component 8 designed above has a simple structure, is firmly installed and convenient, and can effectively connect the well barrel 3, the casing pipe 6 and the crushed stone pad layer 4 into one unit, thus providing better structural reinforcement for the inspection well.

[0035] To facilitate quick installation and removal of the inner cover 9, the middle part of the inner cover 9 has an integrally formed annular mesh basket 91 facing downwards, and the bottom surface of the inner cover 9 is provided with an inner ring 92 that abuts against the inner circumferential wall of the well barrel 3.

[0036] The beneficial technical effects of the sewage inspection wells in the embodiments of this application are roughly as follows:

[0037] By adding a polyurethane sealant layer 7 and metal reinforcements 8, the connection between the casing 6 and the well barrel 3 is made more secure, reducing the adverse effects of ground subsidence or large vehicles pressing down on the casing 6. As a result, the inner cover 9 at the top of the well barrel 3 is less likely to loosen or shake, making the entire inspection well structure more robust, extending its service life, reducing the frequency of maintenance and repair after use, lowering operating costs, and enhancing practicality.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sewage inspection well, characterized in that, The well includes a crushed stone base layer (1), a backfill stone chip layer (2), and a well shaft (3). The backfill stone chip layer (2) is laid on the crushed stone base layer (1). The well shaft (3) is installed vertically inside the backfill stone chip layer (2). A crushed stone pad layer (4) and a concrete layer (5) are laid sequentially on the crushed stone base layer (1). A sheath pipe (6) is provided on the outer peripheral wall of the top of the well shaft (3). A gap is left between the inner peripheral wall of the sheath pipe (6) and the outer peripheral wall of the well shaft (3), and the gap is filled with a polyurethane mortar layer (7). A metal reinforcement (8) is also provided between the sheath pipe (6) and the outer peripheral wall of the well shaft (3). Some parts of the metal reinforcement (8) penetrate through the bottom of the sheath pipe (6) and extend into the crushed stone pad layer (4). An inner cover (9) can also be detachably installed on the top of the well shaft (3).

2. The sewage inspection well according to claim 1, characterized in that, The metal reinforcement component (8) includes a ring (81), multiple fixing bolts (82) and multiple anchor rods (83). The fixing bolts (82) are threaded through the ring (81). The ring (81) is sleeved on the outer peripheral wall of the wellbore (3) and locked by the fixing bolts (82). The anchor rods (83) are arranged laterally and their main bodies are located in the gravel pad layer (4). The inner end of the anchor rod (83) penetrates the bottom of the sheath tube (6) and is threaded onto the ring (81). The anchor rods (83) are perpendicular to the ring (81).

3. The sewage inspection well according to claim 2, characterized in that, The number of the anchor rods (83) is between 3 and 10, the number of the fixing bolts (82) is between 4 and 8, and the fixing bolts (82) are located between adjacent anchor rods (83).

4. The sewage inspection well according to claim 2, characterized in that, A threaded sleeve (84) is provided on the outer peripheral wall of the ring (81), and the inner end of the rebar rod (83) is threadedly assembled in the threaded sleeve (84).

5. The sewage inspection well according to claim 2, characterized in that, The metal reinforcement (8) is made of stainless steel, and the length of the rebar rod (83) extending into the gravel pad layer (4) is between 50 and 100 centimeters.

6. The sewage inspection well according to claim 1, characterized in that, The inner cover (9) has an integrally formed annular mesh basket (91) arranged downwards in the middle, and the bottom surface of the inner cover (9) is provided with an inner ring (92) that abuts against the inner peripheral wall of the well barrel (3).

7. The sewage inspection well according to claim 1, characterized in that, A concrete annular base (10) is also provided on the concrete layer (5). An outer well ring (11) and an inner well seat (12) are fixed on the concrete annular base (10). The outer well ring (11) and the inner well seat (12) are both annular structures and cast iron parts. A steel fiber reinforced concrete well cover (13) is installed in the inner well seat (12).

8. The sewage inspection well according to claim 7, characterized in that, A concrete filling ring (14) is also provided in the gap between the outer well ring (11) and the inner well seat (12), and the cross-section of the concrete filling ring (14) is a right triangle.

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