A manhole cover structure

Abstract

This utility model provides a manhole cover structure, which includes: a concrete reinforcement layer laid around the manhole cover, a connecting structure located around the concrete reinforcement layer, and a cement-stabilized crushed stone layer located around the connecting structure. The connecting structure allows for lateral elastic deformation between the concrete reinforcement layer and the cement-stabilized crushed stone layer. By incorporating the connecting structure, this manhole cover structure effectively solves the problem of lateral cracking at the junction of the cement-stabilized crushed stone layer and the surrounding concrete reinforcement layer. It also optimizes the construction process, reduces the need for manual removal of the cement-stabilized crushed stone layer, improves construction quality and efficiency, and lowers construction costs.

Description

Technical Field

[0001] This utility model relates to the field of municipal inspection well technology, specifically to an inspection well opening laying structure. Background Technology

[0002] In existing technologies for laying inspection wells, the typical construction process is as follows: first, a cement-stabilized crushed stone layer is laid; then, a 20cm thick layer is removed via back excavation; finally, reinforcement binding and concrete pouring are carried out. However, this method has several drawbacks: First, the construction process is rigid; if the cement-stabilized crushed stone layer construction is obstructed, the inspection well ring reinforcement construction will also be forced to stop, severely affecting the construction progress. Second, from a cost perspective, the additional back excavation work increases manpower and material resources, directly leading to higher construction costs. Third, manual removal of the cement-stabilized crushed stone layer has significant limitations; manual operation makes it difficult to precisely control the depth and width of the removal, easily resulting in deviations. This not only affects the quality of the concrete reinforcement of the inspection well ring but may also cause transverse cracks at the junction with the cement-stabilized crushed stone layer. Furthermore, manual removal is inefficient, time-consuming, and improper operation can easily damage the inspection well ring. The lack of smooth coordination between each construction stage further hinders the smooth progress of the overall construction.

[0003] The existing patent, "A Reinforced Structure for Inspection Wells" (Publication No. CN219773035U), describes a device comprising an inspection well pit, a concrete support wall, reinforcing steel bars, an outer frame of the inspection well, an inner reinforcing support ring, an inner convex triangular support frame, a foundation, an inspection well cover, and extended support legs. Its structure involves a concrete support wall on the inner sidewall of the inspection well pit, with reinforcing steel bars arranged within the wall. The upper ends of the reinforcing steel bars are connected to the outer frame of the inspection well. An inner reinforcing support ring is located in the middle of the concrete support wall, connected to the reinforcing steel bars, and an inner convex triangular support frame is positioned between it and the outer frame of the inspection well. The inspection well cover is fastened to the middle of the inspection well pit, and the extended support legs at the lower end of the cover are connected to the foundation. However, this equipment only solves the problem of the inspection well frame being embedded within the structure; it cannot address the problem of transverse cracks occurring at the junction of the concrete layer and the cement-stabilized crushed stone layer of the inspection well ring, nor can it handle the issue of low construction efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a manhole cover laying structure to solve the problem of transverse cracks at the junction of the cement-stabilized crushed stone layer and the concrete layer of the manhole ring in the prior art, as well as the problems of low construction efficiency, high construction cost and easy damage to the manhole ring.

[0005] This utility model provides a manhole opening laying structure, which includes: a concrete reinforcement layer laid around the manhole opening, a connecting structure located around the concrete reinforcement layer, and a cement-stabilized crushed stone layer located around the connecting structure; the connecting structure is capable of lateral elastic change between the concrete reinforcement layer and the cement-stabilized crushed stone layer.

[0006] Furthermore, the connecting structure includes an isolation ring and an elastic pad, wherein the isolation ring is located between the concrete reinforcement layer and the cement-stabilized crushed stone layer, and the elastic pad is respectively disposed between the isolation ring and the concrete reinforcement layer and between the isolation ring and the cement-stabilized crushed stone layer, for elastically changing according to the transverse cracking between the concrete reinforcement layer and the cement-stabilized crushed stone layer.

[0007] Furthermore, the isolation ring is a T-shaped steel, with the wider end of the T-shaped steel located on the top surface of the junction between the concrete reinforcement layer and the cement-stabilized crushed stone layer, and the other end located at the bottom of the junction.

[0008] Furthermore, the concrete reinforcement layer is formed by setting a steel mesh and pouring cement.

[0009] As can be seen from the above embodiments, the manhole cover laying structure provided by this utility model has at least the following advantages: the manhole cover laying structure, by setting a connecting structure with an elastic pad, can effectively solve the problem of transverse cracks at the junction of the cement-stabilized crushed stone layer and the concrete reinforcement layer around the manhole cover by utilizing its elastic change characteristics. At the same time, it optimizes the construction process, reduces the manual removal of the cement-stabilized crushed stone layer, improves the construction quality and efficiency, and reduces the construction cost.

[0010] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0011] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of this utility model.

[0012] Figure 1 A side sectional view of a manhole cover structure provided by this utility model.

[0013] Figure 2 This is a top view of a manhole cover structure provided by this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1-Concrete reinforcement layer, 2-Connecting structure, 3-Cement-stabilized crushed stone layer, 4-Manhole cover;

[0016] 11-Steel mesh;

[0017] 21-Isolation ring, 22-Elastic pad. Detailed Implementation

[0018] Various exemplary embodiments of the present invention are now described in detail. This detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, features and implementations of the present invention.

[0019] Various improvements and variations can be made to the specific embodiments described in this utility model without departing from the scope or spirit of this utility model, which will be obvious to those skilled in the art. Other embodiments derived from this utility model description will also be obvious to those skilled in the art. This application specification and embodiments are merely exemplary.

[0020] This utility model provides a manhole cover laying structure, such as Figure 1 and 2 The diagram shows a schematic representation of the wellhead laying structure. In a specific embodiment, the wellhead laying structure includes: a concrete reinforcement layer 1 laid around the wellhead, a connecting structure 2 located around the concrete reinforcement layer 1, and a cement-stabilized crushed stone layer 3 located around the connecting structure 2. The connecting structure 2 is capable of lateral elastic deformation between the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3.

[0021] In this embodiment, after the concrete reinforcement layer 1 is laid around the manhole opening, the manhole cover 2 is installed on the manhole opening. Then, a connecting structure 2 is set on the side wall of the concrete reinforcement layer 1 around the outside of the concrete reinforcement layer 1. Finally, the cement-stabilized crushed stone layer 3 of the road surface is laid around the connecting structure 2, so that the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3 are physically isolated, and can achieve elastic change in the lateral direction according to the lateral change of the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3, thus avoiding the generation of lateral cracks.

[0022] Furthermore, the connecting structure 2 includes an isolation ring 21 and an elastic pad 22. The isolation ring 21 is located between the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3. The elastic pad 22 is respectively disposed between the isolation ring 21 and the concrete reinforcement layer 1, and between the isolation ring 21 and the cement-stabilized crushed stone layer 3. It is used to elastically change according to the transverse cracking between the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3, thus preventing the occurrence of transverse cracks. In this embodiment, the elastic pad 22 is a rubber pad, typically made of 10mm thick rubber. Utilizing the good compressibility of the rubber pad, it effectively buffers and absorbs the stress generated at the joint between the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3 due to differences in material properties, such as different coefficients of thermal expansion and contraction, thereby preventing the occurrence of transverse cracks.

[0023] In a specific embodiment of this utility model, the isolation ring 21 is a T-shaped steel. The wider end of the T-shaped steel is positioned on the top surface of the junction between the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3, while the other end is located at the bottom of the junction. Figure 2 As shown, the T-shaped steel is used to wrap around the perimeter of the concrete reinforcement layer 1, which can protect the outer edge of the concrete reinforcement layer 1 and the inner edge of the cement-stabilized crushed stone layer 3 to a certain extent, and prevent edge cracking caused by external pressure.

[0024] In this embodiment, the T-shaped steel is made of 3mm thick stainless steel to avoid problems such as rusting after long-term use. The main function of the isolation ring 21 is to physically separate the concrete reinforcement layer 1 and the cement-stabilized crushed stone layer 3 structurally.

[0025] In a specific embodiment of this utility model, the concrete reinforcement layer 1 is formed by setting a steel mesh 11 and pouring cement, thereby strengthening the structural strength of the concrete reinforcement layer 1.

[0026] The construction process for the manhole cover structure is as follows:

[0027] First, the reinforcing mesh 11 is tied around the manhole opening of the water supply and drainage inspection well. Then, the manhole cover 2 is installed. Next, an isolation ring 21 is installed around the reinforcing mesh 11, with an elastic pad 22 installed inside the isolation ring 21. Temporary rebar is used for fixation on the outside (the isolation ring 21 acts as a template). After the above installation is completed, the concrete reinforcement layer 1 is poured. After the concrete reinforcement layer 1 has hardened to a certain strength, the temporary rebar is removed, and the elastic pad 22 is installed again on the outer side of the isolation ring 21. Finally, a cement-stabilized crushed stone layer 3 is laid on the road surface outside the outermost elastic pad 22. This completes the paving task for the manhole opening.

[0028] The separation effect of the isolation ring 21 and the deformation adjustment effect of the double-layer elastic pad 22 effectively solve the problem of transverse cracks at the junction of the two different materials, concrete reinforcement layer 1 and cement-stabilized crushed stone layer 3.

[0029] The above description is merely an illustrative embodiment of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A structure for laying out a manhole, characterized by, The wellhead paving structure includes: a concrete reinforcement layer (1) laid around the wellhead of the inspection well, a connecting structure (2) located outside the concrete reinforcement layer (1), and a cement-stabilized crushed stone layer (3) located outside the connecting structure (2). The connecting structure (2) is capable of lateral elastic change between the concrete reinforcement layer (1) and the cement-stabilized crushed stone layer (3); The connecting structure (2) includes an isolation ring (21) and an elastic pad (22), wherein, The isolation ring (21) is located between the concrete reinforcement layer (1) and the cement-stabilized crushed stone layer (3). The elastic pad (22) is respectively set between the isolation ring (21) and the concrete reinforcement layer (1) and between the isolation ring (21) and the cement-stabilized crushed stone layer (3), and is used to elastically change according to the transverse cracking between the concrete reinforcement layer (1) and the cement-stabilized crushed stone layer (3).

2. The manhole cover laying structure according to claim 1, characterized in that, The isolation ring (21) is a T-shaped steel. The wider end of the T-shaped steel is located on the top surface of the connection between the concrete reinforcement layer (1) and the cement-stabilized crushed stone layer (3), and the other end is located at the bottom of the connection.

3. The manhole cover laying structure according to claim 1, characterized in that, The concrete reinforcement layer (1) is formed by setting up a steel mesh (11) and pouring cement.

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