Split type prefabricated inspection well and construction method

Abstract

This application relates to the field of pipeline engineering technology, and in particular to a split-type prefabricated inspection well and its construction method. The split-type prefabricated inspection well includes a first component and a second component. The first component has a first mating portion, and the second component has a second mating portion adapted to the first mating portion. Both the contact surfaces of the first and second mating portions are provided with grout grooves. The first mating portion has a first grouting channel communicating with the grout grooves. After the first and second components are radially mated along the inspection well, the two grout grooves form a grouting cavity. Grouting material is injected into the grouting cavity through the first grouting channel. After the grouting material hardens, it forms a wedge-shaped tenon structure, thereby connecting and fixing the first and second components. The solution provided by this application provides reliable mechanical interlocking through the wedge-shaped tenon structure of the first and second components, significantly improving connection strength and stability, simplifying the installation process, and effectively avoiding stress concentration and corrosion problems.

Description

Technical Field

[0001] This application relates to the field of pipeline engineering technology, and in particular to a split-type prefabricated inspection well and its construction method. Background Technology

[0002] In the field of municipal drainage engineering, prefabricated manholes have seen their application scope continuously expand due to their advantages such as high construction efficiency and strong quality control. As an important technological branch, modular prefabricated manholes, by disassembling the manhole body into multiple components for on-site assembly, effectively solve the problems of transportation difficulties and complex hoisting caused by the large size of integrated manholes, significantly improving construction flexibility and adaptability, and becoming a key direction for industry technological upgrading. However, the existing component connection methods of modular prefabricated manholes have significant defects. Most use mechanical connection structures such as bolts and clips, requiring multiple positioning, hole alignment, and tightening operations during on-site assembly. The process is cumbersome and time-consuming, easily affected by the technical level of construction personnel, making it difficult to guarantee installation accuracy. At the same time, bolt holes and clip grooves create localized stress concentration areas in the components. Under long-term exposure to groundwater seepage pressure, soil lateral pressure, and external dynamic loads, these areas are prone to loosening, deformation, and even micro-crack propagation at the connection points, severely weakening the overall structural integrity. Furthermore, metal bolts and other components are prone to corrosion and strength degradation in humid and corrosive environments, further reducing connection reliability and making it difficult to meet the long-term stability requirements of inspection wells in complex underground environments. Some designs attempt to use grouting materials to replace mechanical connections, but the grouting layer mainly relies on chemical bonding force and lacks an effective mechanical interlocking mechanism. This leads to slippage or peeling of the connection interface under shear and tensile forces, especially in heavy traffic areas or high-water groundwater environments, where the problem of insufficient connection strength is more prominent. This makes it unable to effectively resist structural deformation and damage risks under complex working conditions, thus restricting the application and promotion of prefabricated modular inspection wells in high-standard projects. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this application provides a split prefabricated inspection well, which has a first component and a second component forming a wedge tenon structure to provide reliable mechanical interlocking, which can significantly improve the connection strength and stability, and has the advantages of simplifying the installation process and effectively avoiding stress concentration and corrosion problems.

[0004] The first aspect of this application provides a split prefabricated inspection well, including a first component and a second component. The first component is provided with a first docking part, and the second component is provided with a second docking part adapted to the first docking part. The contact surfaces of the first docking part and the second docking part are both provided with grout grooves. The first docking part is provided with a first grouting channel communicating with the grout grooves. Wherein, after the first component and the second component are radially connected along the inspection well, the two grout grooves form a grouting cavity. Grouting material is injected into the grouting cavity through the first grouting channel. After the grouting material hardens, it forms a wedge tenon structure so that the first component and the second component are connected and fixed.

[0005] In some embodiments, the first mating part is a plug structure, and the second mating part is a socket structure.

[0006] In some embodiments, the cross-section of the slurry tank includes any one of rectangular, circular, semi-circular, elliptical, and trapezoidal shapes.

[0007] In some embodiments, the grouting material includes any one of UHPC grout, HPC grout, ordinary cement grout, micro-expansion cement grout, epoxy resin grout, and polyurethane structural adhesive.

[0008] In some embodiments, the first component and the second component have equal cross-sectional areas.

[0009] In some embodiments, the first and second components are made of any one of ultra-high performance concrete, high performance concrete, and ordinary cement concrete.

[0010] In some embodiments, the first grouting channel includes a main grouting hole and at least one vent hole. The main grouting hole is located at the lower part of the first docking portion, and the vent hole is located at the upper part of the first docking portion, with the vent hole situated at the highest point of the grouting trough.

[0011] In some embodiments, an elastic seal is provided between the contact surfaces of the first docking portion and the second docking portion.

[0012] In some embodiments, the semicircular groove of the first component is provided with an inwardly recessed first semicircular groove and a second grouting channel communicating with the first semicircular groove, and the semicircular groove of the second component is provided with an inwardly recessed second semicircular groove. The first and second semicircular grooves enclose a hole for inserting the pipe section. The outer periphery of the pipe section has an annular groove that matches the first and second semicircular grooves. The annular groove, the first semicircular groove, and the second semicircular groove enclose a circular groove. Grouting material is injected into the circular groove through the second grouting channel. After the grouting material hardens, it forms a wedge tenon structure so that the pipe section can be connected and fixed to the first component and the second component respectively.

[0013] The second aspect of this application provides a construction method for a split-type prefabricated inspection well, comprising the following steps: (1) Excavation and acceptance of the foundation trench, followed by pouring the plain concrete cushion layer under the pipeline and well chamber; (2) The second component is hoisted and installed on the manhole pad layer, and the levelness and center position of the second component are calibrated by a level. (3) Construct pipe supports and lay pipe sections onto the second component, then hoist the first component and radially connect the first and second components; (4) Grouting material is injected into the grouting tank through the first grouting channel, and a wedge tenon structure is formed after the grouting material hardens; (5) Use mortar to seal the gaps at the connection between the pipe section, the first component, and the second component; (6) Hoist the cover plate and shaft section to complete the well chamber construction.

[0014] The technical solution provided in this application may include the following beneficial effects: The prefabricated split inspection well provided in this application consists of a first component and a second component that are assembled radially together. After the two components are radially joined, the grout grooves together form a grouting cavity. Grouting material is injected into the grouting cavity through the grouting channel. After the grouting material hardens, it forms a wedge tenon structure. This not only achieves high-strength rigid locking between the first and second components through the tenon and mortise joint, but also eliminates the reliance on mechanical connection structures such as bolt holes and snap-fit ​​grooves or simple grouting bonding force. It has multiple technical advantages, such as significantly shortening the construction cycle, simplifying the on-site assembly process, and significantly improving the connection reliability and sealing and seepage prevention performance. Attached Figure Description

[0015] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0016] Figure 1 This is an assembly schematic diagram of a split-type prefabricated inspection well shown in an embodiment of this application; Figure 2 This is an exploded schematic diagram of a split-type prefabricated inspection well as shown in the embodiments of this application.

[0017] 1. First component; 10. First docking part; 11. Grouting channel; 2. Second component; 20. Second docking part; 3. Grouting tank. Detailed Implementation

[0018] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0019] Existing prefabricated modular inspection well components mostly use mechanical connections such as bolts and clips, which have problems such as cumbersome assembly processes, easy formation of stress concentration points, easy loosening and deformation under long-term stress, and component corrosion, making it difficult to guarantee the long-term stability of the structure. In addition, some solutions that rely on the bonding force of grouting materials are difficult to form a stable mechanical locking structure, and the connection strength cannot withstand the shear and tensile forces under complex working conditions, making it difficult to meet the engineering requirements of heavy-load and high-water-level areas.

[0020] To address the aforementioned issues, this application provides a modular prefabricated inspection well, which features a first and second component forming a wedge tenon structure to provide reliable mechanical interlocking. This significantly improves connection strength and stability, simplifies the installation process, and effectively avoids stress concentration and corrosion problems.

[0021] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0022] See Figure 1 and Figure 2 This application proposes a split prefabricated inspection well, including a first component 1 and a second component 2. The first component 1 is provided with a first docking part 10, and the second component 2 is provided with a second docking part 20 adapted to the first docking part 10. The contact surfaces of the first docking part 10 and the second docking part 20 are both provided with grout grooves 3. The first docking part 10 is provided with a first grouting channel 11 that communicates with the grout grooves 3. Wherein, after the first component 1 and the second component 2 are radially connected along the inspection well, the two grout grooves 3 form a grouting cavity. Grouting material is injected into the grouting cavity through the first grouting channel 11. After the grouting material hardens, it forms a wedge tenon structure so that the first component 1 and the second component 2 are connected and fixed.

[0023] Specifically, the first component 1 and the second component 2 are concrete components. The first component 1 and the second component 2 can be formed by cutting a single chamber in half, or they can be prefabricated with one component larger than the other. The shapes of the first component 1 and the second component 2 can be prefabricated as semi-circular or rectangular according to actual construction needs. The first connecting part 10 and the second connecting part 20 are used to achieve radial alignment between the two components. They can be designed with mutually compatible geometric shapes, such as both being convex structures with consistent axial cross-sections, or the first connecting part 10 being a convex structure and the second connecting part 20 being a concave structure, achieving radial alignment through interlocking. In this case, the grout groove 3 of the first connecting part 10 is a through-open structure, and each side wall of the concave structure of the second connecting part 20 is provided with a grout groove 3, or the contact surface of the first connecting part 10 and the second connecting part 20 is an inclined contact surface. The grout groove 3 forms a grouting cavity after the two components are radially joined. The geometry of the grouting cavity can be regularly formed, such as circular, elliptical, or trapezoidal. Correspondingly, the grouting cavity can also be set to an irregular shape, but compared with the regular shape, the mechanical locking effect formed after the grouting material hardens will be weakened. The first grouting channel 11 is used to introduce the grouting material into the grouting cavity formed by the grout groove 3, and at the same time realize the air venting work during grouting.

[0024] When applying the technical solution of this application, after completing the preliminary construction (such as trench excavation, foundation laying, etc.), the second component 2 is lifted into the trench and installed and fixed. Then, the pipe section corresponding to the pipe is lifted onto the semi-circular groove of the second component 2. After alignment and installation, the first component 1 is lifted. After aligning the first docking part 10 and the second docking part 20, grouting work can be carried out. After the grouting material hardens and is cured, subsequent construction can continue.

[0025] In this embodiment, the connection and fixation between components is achieved by using the wedge tenon structure formed after the grouting material has hardened. This avoids the cumbersome procedures, stress concentration and corrosion problems caused by traditional mechanical connections such as bolts and clips. At the same time, it overcomes the defect of insufficient connection strength relying solely on the bonding force of the grouting material. The connection structure with stable mechanical locking function can resist shear and tensile forces under complex working conditions, thereby ensuring the long-term stability and durability of the inspection well structure in heavy-load and high-water-level areas.

[0026] Furthermore, the first mating part 10 is a plug structure, and the second mating part 20 is a socket structure.

[0027] Specifically, the spigot structure is a connecting end with a protruding portion, its outer diameter being slightly smaller than the inner diameter of the socket structure to facilitate insertion. The socket structure is a connecting end with a recessed portion, which mates with the spigot structure, its inner diameter being slightly larger than the outer diameter of the spigot structure, to accommodate the spigot structure. When the first component 1 and the second component 2 are radially joined, the spigot structure can be effectively guided and accommodated by the socket structure, improving the alignment accuracy and installation efficiency during component joining and reducing the alignment difficulty on the construction site. At the same time, the fit between the spigot and the socket provides a preliminary mechanical limiting effect, effectively preventing radial relative displacement between the first component 1 and the second component 2 before the grouting material hardens, ensuring the integrity of the grouting cavity, ensuring the reliable formation of the subsequent wedge tenon structure, and thus improving the stability and construction quality of the entire inspection well connection.

[0028] Correspondingly, the spigot and socket can also be provided with corresponding protrusions and recesses to axially limit the movement of the two components.

[0029] Furthermore, the cross-section of the slurry tank 3 includes any one of the following: rectangular, circular, semi-circular, elliptical, and trapezoidal.

[0030] Specifically, the cross-section of the grout groove 3 refers to its cross-sectional shape perpendicular to its length. When the cross-section of the grout groove 3 is rectangular, its advantages lie in its relatively simple manufacturing process and the ability to provide a larger grouting volume, thus forming a robust connection. However, the right-angled edges of the rectangle may pose a risk of stress concentration under load, and there is also the problem of incomplete grouting. When the cross-section of the grout groove 3 is circular or semi-circular, its smooth curved surface facilitates the flow and filling of the grouting material, reduces the generation of air bubbles and voids, and ensures the compactness of the grouting. Simultaneously, the circular or semi-circular structure can effectively disperse stress, reduce stress concentration, and improve the durability of the connection. When the cross-section of the grout groove 3 is elliptical, it combines some advantages of both circles and rectangles, providing a relatively smooth transition, aiding in stress dispersion, and allowing the shape of the grouting cavity to be adjusted according to the ratio of its major and minor axes to adapt to different structural requirements. When the cross-section of the grout groove 3 is trapezoidal, this is a particularly effective structural form, especially suitable for forming wedge tenon structures. Typically, the wider side of the trapezoid is designed inside or at the bottom of the grouting cavity, while the narrower side faces outwards or towards the opening. After the grouting material hardens, the wedge-shaped structure it forms can tightly interlock with the trapezoidal wall of the grout groove 3, generating a strong mechanical interlocking effect, thereby significantly enhancing the tensile and shear resistance between the first component 1 and the second component 2, and further consolidating the stability of the connection.

[0031] Furthermore, the grouting material includes any one of UHPC grout, HPC grout, ordinary cement grout, micro-expansion cement grout, epoxy resin grout, and polyurethane structural adhesive.

[0032] In practical implementation, depending on the project's different requirements for connection strength, durability, impermeability, crack resistance, and construction environment, any one of the following can be selected as the grouting material: UHPC grout, HPC grout, ordinary cement grout, micro-expansion cement grout, epoxy resin grout, or polyurethane structural adhesive. Among them, UHPC grout is an ultra-high performance concrete grout, a cement-based composite material with ultra-high strength, high toughness, high durability, and low permeability. It is typically composed of cement, silica fume, superplasticizer, fine aggregate (such as quartz sand), and steel fibers, prepared through optimized gradation and special curing processes. Using UHPC grout as the grouting material can provide extremely high load-bearing capacity and crack resistance for the connection of inspection wells, making it suitable for projects with stringent requirements for structural performance and service life.

[0033] HPC grout is a high-performance concrete grout, a cement-based material with high strength, high durability, low permeability, and good workability. It is prepared by optimizing the water-cement ratio and incorporating high-efficiency water-reducing agents and mineral admixtures (such as fly ash and slag powder). While ensuring good workability, HPC grout provides superior strength and durability compared to ordinary cement grout, making it a cost-effective option.

[0034] Ordinary cement grout is a paste made by mixing ordinary Portland cement with water as the main cementing material. It is typically composed of cement and water mixed in a certain proportion, with the addition of small amounts of sand or admixtures as needed. Ordinary cement grout is relatively inexpensive, easy to apply, and suitable for routine connections where strength and durability requirements are not high, thus meeting general engineering needs.

[0035] Micro-expansion cement grout is a cement-based grout that exhibits slight expansion during the hardening process. It is prepared by adding an expansive agent (such as calcium sulfoaluminate-based expansive agents) to ordinary cement. The micro-expansion characteristic of micro-expansion cement grout can effectively compensate for the shrinkage during the cement hardening process, resulting in a tighter bond between the grouting material and the first component 1 and the second component 2. This significantly improves the density and impermeability of the connection, reducing the risk of leakage.

[0036] Epoxy resin grout is a polymer grout composed of epoxy resin as a base material, with the addition of curing agents, fillers, and other components. It is typically a two-component or multi-component material, mixed on-site according to specified proportions before use. Epoxy resin grout possesses extremely high bonding strength, chemical resistance, rapid curing, and low shrinkage characteristics, making it suitable for applications requiring special bonding performance, corrosion resistance, and rapid application.

[0037] Polyurethane structural adhesives are structural adhesives with polyurethane prepolymer as the main component. They are usually one-component or two-component and cure by reacting with moisture in the air or another component. Polyurethane structural adhesives have excellent elasticity, bond strength, weather resistance, and seismic performance, making them suitable for applications requiring a certain degree of flexibility, fatigue resistance, and the ability to maintain connection integrity under dynamic loads.

[0038] Furthermore, the cross-sectional areas of the first component 1 and the second component 2 are equal. This equality ensures that the two components have similar weight and center of gravity distribution during manufacturing, handling, and installation, significantly simplifying the design and manufacturing process of the production mold and reducing production costs. During transportation and hoisting, this symmetry helps maintain the balance of the components, reducing the risk of tilting or instability and improving operational safety. More importantly, during on-site installation, the alignment and splicing of the two components become easier and more precise, effectively avoiding installation deviations caused by uneven component size or weight. Ultimately, this design ensures that the prefabricated modular inspection well, after assembly, experiences uniform stress on its overall structure, improving the long-term stability and durability of the inspection well and effectively solving the structural balance and construction difficulties that may arise from component mismatch.

[0039] Furthermore, the first component 1 and the second component 2 are made of any one of ultra-high performance concrete, high performance concrete and ordinary cement concrete.

[0040] Specifically, the first component 1 and the second component 2, as the main load-bearing structures of the prefabricated split inspection well, have their material selection directly affecting the overall mechanical properties and long-term service performance of the inspection well. When the first component 1 and the second component 2 are made of ultra-high performance concrete (UHPC), this material possesses extremely high compressive strength, tensile strength, flexural strength, as well as excellent toughness, durability, and impermeability. The preparation of ultra-high performance concrete is typically achieved through optimizing aggregate gradation, using highly active cementitious materials (such as silica fume and ultrafine slag), adding high-performance water-reducing agents and steel fibers, etc., enabling it to resist harsh environmental factors such as freeze-thaw cycles, chemical erosion, and abrasion, significantly extending the service life of the inspection well. When the first component 1 and the second component 2 are made of high-performance concrete (HPC), this material is superior to ordinary concrete in terms of strength, durability, and workability. High-performance concrete is typically prepared through techniques such as selecting high-quality raw materials, optimizing mix proportions, adding mineral admixtures (such as fly ash and slag powder), and using high-efficiency water-reducing agents. This results in higher strength and better resistance to impermeability, carbonation, and freeze-thaw cycles, making it suitable for manhole components with high structural performance requirements. When the first component 1 and the second component 2 are made of ordinary cement concrete, this material is one of the most widely used materials in construction engineering, composed of cement, aggregates (sand, stone), water, and appropriate admixtures in a specific ratio. Ordinary cement concrete has the advantages of lower cost and ease of construction, making it suitable for manhole projects with relatively low performance requirements or limited budgets.

[0041] Furthermore, the first grouting channel 11 includes a main grouting hole and at least one vent hole. The main grouting hole is located at the lower part of the first docking part 10, and the vent hole is located at the upper part of the first docking part 10, with the vent hole situated at the highest point of the grouting tank 3.

[0042] Furthermore, an elastic seal is provided between the contact surfaces of the first docking part 10 and the second docking part 20.

[0043] In some embodiments described above, the first component 1 and the second component 2 are connected by a wedge-shaped tenon structure formed by hardening grouting material. However, in practical applications, the inspection well also needs to be reliably connected to the external pipeline (pipe section) to ensure the sealing and structural stability of the entire inspection well system. If the connection between the pipe section and the inspection well components is not firm or the seal is poor, it may lead to leakage, displacement, or even structural damage, affecting the normal service life and function of the inspection well.

[0044] In this regard, this application further proposes that the semicircular tube groove of the first component 1 is provided with an inwardly recessed first semicircular groove and a second grouting channel 11 connecting the first semicircular groove, and the semicircular tube groove of the second component 2 is provided with an inwardly recessed second semicircular groove. The first semicircular groove and the second semicircular groove enclose a pipe hole for inserting the pipe section. The outer periphery of the pipe section has an annular groove that matches the first semicircular groove and the second semicircular groove. The annular groove, the first semicircular groove and the second semicircular groove enclose a circular groove. Grouting material is injected into the circular groove through the second grouting channel 11. After the grouting material hardens, it forms a wedge tenon structure so that the pipe section is connected and fixed to the first component 1 and the second component 2 respectively.

[0045] Specifically, the semi-circular groove of the first component 1 and the semi-circular groove of the second component 2 cooperate with the annular groove on the outer periphery of the pipe section to jointly form a closed annular groove. Grouting material is injected into this annular groove through the second grouting channel 11 and allowed to harden, forming a wedge tenon structure with excellent pull-out and shear resistance. This structure not only firmly fixes the pipe section between the first component 1 and the second component 2, effectively preventing axial displacement and radial rotation of the pipe section, but also greatly improves the sealing performance of the connection by filling with grouting material, preventing groundwater infiltration or sewage leakage. This significantly enhances the overall structural stability and watertightness of the connection between the split prefabricated inspection well and the external pipeline, ensuring the long-term reliable operation of the inspection well.

[0046] This application further proposes a construction method for a split-type prefabricated inspection well, which includes the following steps: (1) Excavation and acceptance of the foundation trench, followed by pouring the plain concrete cushion layer under the pipeline and well chamber; (2) The second component 2 is hoisted and installed on the manhole pad layer, and the levelness and center position of the second component 2 are calibrated by a level. (3) Construct the pipe seat and lay the pipe section on the second component 2, then hoist the first component 1 and radially connect the first component 1 and the second component 2; (4) Grouting material is injected into the grouting tank 3 through the first grouting channel 11, and a wedge tenon structure is formed after the grouting material hardens. (5) Use mortar to seal the gaps at the connection between the pipe section, the first component 1, and the second component 2; (6) Hoist the cover plate and shaft section to complete the well chamber construction.

[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A split precast inspection chamber, characterised in that, It includes a first component and a second component. The first component is provided with a first docking part, and the second component is provided with a second docking part adapted to the first docking part. The contact surfaces of the first docking part and the second docking part are both provided with grout grooves. The first docking part is provided with a first grouting channel communicating with the grout groove. Wherein, after the first component and the second component are radially connected along the inspection well, the two grout grooves form a grouting cavity. Grouting material is injected into the grouting cavity through the first grouting channel. After the grouting material hardens, it forms a wedge tenon structure so that the first component and the second component are connected and fixed.

2. The split precast inspection chamber of claim 1, wherein, The first mating part is a plug structure, and the second mating part is a socket structure.

3. The split precast inspection chamber of claim 1, wherein, The cross-section of the slurry tank includes any one of the following: rectangular, circular, semi-circular, elliptical, and trapezoidal.

4. The split precast inspection chamber of claim 1, wherein, The grouting material includes any one of UHPC grout, HPC grout, ordinary cement grout, micro-expansion cement grout, epoxy resin grout, and polyurethane structural adhesive.

5. The split precast inspection shaft of claim 1, wherein, The cross-sectional areas of the first component and the second component are equal.

6. The split precast inspection shaft of claim 1, wherein, The first component and the second component are made of any one of ultra-high performance concrete, high performance concrete and ordinary cement concrete.

7. The split precast inspection shaft of claim 1, wherein, The first grouting channel includes a main grouting hole and at least one vent hole. The main grouting hole is located at the lower part of the first docking part, and the vent hole is located at the upper part of the first docking part, with the vent hole at the highest point of the grouting tank.

8. The split precast inspection shaft of claim 1, wherein, An elastic seal is provided between the contact surfaces of the first docking part and the second docking part.

9. The split precast inspection shaft of claim 1, wherein, The first component has a semi-circular groove with an inwardly recessed first semi-circular groove and a second grouting channel connecting the first semi-circular groove; the second component has a semi-circular groove with an inwardly recessed second semi-circular groove. The first and second semicircular grooves enclose a hole for inserting the pipe section. The outer periphery of the pipe section has an annular groove that matches the first and second semicircular grooves. The annular groove, the first semicircular groove, and the second semicircular groove enclose a circular groove. Grouting material is injected into the circular groove through the second grouting channel. After the grouting material hardens, it forms a wedge tenon structure so that the pipe section can be connected and fixed to the first component and the second component respectively.

10. A method of constructing a split precast inspection chamber, characterised in that, Includes the following steps: (1) Excavation and acceptance of the foundation trench, followed by pouring the plain concrete cushion layer under the pipeline and well chamber; (2) The second component is hoisted and installed on the manhole pad layer, and the levelness and center position of the second component are calibrated by a level. (3) Construct pipe supports and lay pipe sections onto the second component, then hoist the first component and radially connect the first and second components; (4) Grouting material is injected into the grouting tank through the first grouting channel, and a wedge tenon structure is formed after the grouting material hardens; (5) Use mortar to seal the gaps at the connection between the pipe section, the first component, and the second component; (6) Hoist the cover plate and shaft section to complete the well chamber construction.

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