Concrete prefabricated encapsulating component of shallow buried pipeline

Abstract

The utility model discloses a concrete prefabricated encapsulating component of a shallow buried pipeline. The concrete prefabricated encapsulating component is formed by a bearing structural block and a cover plate structural block in an embracing mode. The top surface of the bearing structural block comprises a lower semicircular arc surface, two inner top surfaces, two lower tongue-and-groove inclined surfaces and two outer top surfaces, the outer top surfaces and the inner top surfaces are horizontal surfaces parallel to the bottom surface of the bearing structural block, and the outer top surfaces are higher than the inner top surfaces; a plurality of lower through holes are formed in the lower tongue-and-groove inclined surface; a lower tenon and a lower mortise are convexly arranged on two end surfaces of the bearing structure block in a one-to-one correspondence manner; the bottom surface of the cover plate structural block comprises an upper semicircular arc surface, two inner bottom surfaces, two upper tongue-and-groove inclined surfaces and two outer bottom surfaces, the outer bottom surfaces and the inner bottom surfaces are horizontal surfaces parallel to the top surface of the cover plate structural block, and the inner bottom surfaces are lower than the outer bottom surfaces; a plurality of upper through holes are formed in the upper tongue-and-groove inclined surface; and an upper tenon and an upper mortise are convexly arranged on two end surfaces of the cover plate structural block in a one-to-one correspondence manner. According to the utility model, centralized prefabrication and on-site installation can be realized, and the construction efficiency of pipeline encapsulation can be greatly improved.

Description

Technical Field

[0001] This utility model relates to a precast concrete encapsulation component for shallow buried pipelines. Background Technology

[0002] When pipelines traverse areas with low bearing capacity or complex geological conditions, such as collapsible loess or soft soil areas, the pipeline foundation may settle due to ground instability. In such cases, to enhance pipeline stability and prevent pipeline damage or leakage caused by foundation settlement, encapsulation and reinforcement measures are required. Encapsulation and reinforcement can improve the pipeline's compressive strength and overall rigidity by adding supporting structures around the pipeline, such as reinforced concrete encapsulation. However, there are some limiting objective factors in the construction of underground drainage pipelines, such as narrow tunnels that do not meet the conditions for cast-in-place concrete encapsulation. Even in areas where cast-in-place concrete encapsulation is feasible, there are problems such as long waiting times for concrete to set, numerous supporting formwork procedures, and long intervals between procedures. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a precast concrete encapsulation component for shallow buried pipelines. It can be precast centrally and installed on site, which greatly improves the construction efficiency of pipeline encapsulation.

[0004] The purpose of this utility model is achieved as follows: a precast concrete encapsulation component for shallow-buried pipelines, shaped like a cuboid and composed of a supporting structural block and a cover plate structural block; wherein,

[0005] The supporting structure block is rectangular. The top surface of the supporting structure block includes a lower semi-circular arc surface in the middle, two inner top surfaces located on both sides of the lower semi-circular arc surface, two lower tongue-and-groove inclined surfaces located on the outer sides of the two inner top surfaces, and two outer top surfaces located on the outer sides of the two lower tongue-and-groove inclined surfaces. The outer top surface and the inner top surface are both horizontal planes parallel to the bottom surface of the supporting structure block, and the outer top surface is higher than the inner top surface. Several lower through holes are opened at intervals and vertically downward along the length direction of the supporting structure block on the lower tongue-and-groove inclined surface. A lower tenon protrudes from one end face of the supporting structure block, and a lower mortise protrudes from the other end face of the supporting structure block to fit the lower tenon.

[0006] The cover plate structure block is a rectangular block. The bottom surface of the cover plate structure block includes an upper semi-circular arc surface in the middle, two inner bottom surfaces located on both sides of the upper semi-circular arc surface, two upper tongue-and-groove inclined surfaces located on the outer sides of the two inner bottom surfaces, and two outer bottom surfaces located on the outer sides of the two upper tongue-and-groove inclined surfaces. The outer bottom surface and the inner bottom surface are both horizontal planes parallel to the top surface of the cover plate structure block, and the inner bottom surface is lower than the outer bottom surface. Several upper through holes corresponding to the lower through holes on the supporting structure block are opened at intervals and vertically upward along the length direction of the cover plate structure block on the upper tongue-and-groove inclined surface. One end face of the cover plate structure block is provided with an upper tenon, and the other end face of the cover plate structure block is provided with an upper mortise that matches the upper tenon.

[0007] When the cover plate structure block and the supporting structure block are joined together, the two outer bottom surfaces of the cover plate structure block are fitted with the two outer top surfaces of the supporting structure, the two upper tongue-and-groove bevels of the cover plate structure block are fitted with the two lower tongue-and-groove bevels of the supporting structure block, the two inner bottom surfaces of the cover plate structure block are fitted with the two inner top surfaces of the supporting structure block, and the several upper through holes on the cover plate structure block and the several lower through holes on the supporting structure form several grouting holes; the upper semi-circular arc surface of the cover plate structure block and the lower semi-circular arc surface of the supporting structure block are combined to form a complete circular cavity, and the diameter of the complete circular cavity is adapted to the outer diameter of the pipe.

[0008] In the aforementioned precast concrete encapsulation component for shallow buried pipelines, a cement mortar layer is provided between the lower tongue-and-groove inclined surface of the supporting structural block and the upper tongue-and-groove inclined surface of the cover plate structural block; fine sand concrete is injected into several grouting holes.

[0009] In the aforementioned precast concrete encapsulation component for shallow buried pipelines, both the lower through hole and the upper through hole are oblong-shaped holes.

[0010] The features of the precast concrete encapsulation component for shallow-buried pipelines of this utility model are:

[0011] 1. This invention uses a nested structure of cover plate and support structure, with the cover plate structure and support structure being connected by tenon joints to form a whole and to encapsulate and protect the pipeline. This not only facilitates the maintenance and replacement of the pipeline in the later stages, but also improves the reusability of the encapsulation components. At the same time, it also enables the control of the pipeline's central axis, which is beneficial for controlling the bottom elevation of gravity flow pipelines and for controlling the quality of pipeline construction.

[0012] 2. The supporting structure blocks and cover plate structure blocks of the prefabricated structure are all prefabricated in a hollow form, which not only reduces the weight of the entire encapsulation component, but also allows C25 fine stone concrete to be poured into the hollow structure after the entire encapsulation component is installed, thereby improving the compressive strength of the entire encapsulation component and extending the service life of the pipeline.

[0013] 3. The use of the precast concrete encapsulation component of this utility model accelerates the backfilling rate of the pipeline foundation pit. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the precast concrete encapsulation component for shallow buried pipelines according to this utility model.

[0015] Figure 2 This is a plan view of the precast concrete encapsulation component for shallow-buried pipelines according to this utility model.

[0016] Figure 3 This is a cross-sectional view of the supporting structural block in the precast concrete encapsulation component of this utility model.

[0017] Figure 3a This is a plan view of the supporting structural block in the precast concrete encapsulation component of this utility model;

[0018] Figure 4 This is a cross-sectional view of the cover plate structure block in the precast concrete encapsulation component of this utility model.

[0019] Figure 4a This is a plan view of the cover plate structure block in the precast concrete encapsulation component of this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Please see Figures 1 to 4a The precast concrete encapsulation component for shallow buried pipelines of this utility model is a cuboid in shape and is formed by the combination of a supporting structural block 1 and a cover plate structural block 2.

[0022] The supporting structure block 1 is a rectangular block. The top surface of the supporting structure block 1 includes a lower semi-circular arc surface 10 located in the middle, two inner top surfaces 11 located on both sides of the lower semi-circular arc surface 10, two lower tongue-and-groove inclined surfaces 12 located on the outer sides of the two inner top surfaces 11, and two outer top surfaces 13 located on the outer sides of the two lower tongue-and-groove inclined surfaces 12. The outer top surface 13 and the inner top surface 11 are both horizontal planes parallel to the bottom surface of the supporting structure block 1, and the outer top surface 13 is higher than the inner top surface 11. Several lower through holes 120 are opened at intervals and vertically downward along the length direction of the supporting structure block 1 on the lower tongue-and-groove inclined surfaces 12. The lower through holes 120 are waist-shaped holes. A lower tenon 14 protrudes from one end face of the supporting structure block 1, and a lower mortise 15 that matches the lower tenon 14 protrudes from the other end face of the supporting structure block 1.

[0023] The cover plate structure block 2 is a rectangular block. The bottom surface of the cover plate structure block 2 includes an upper semi-circular arc surface 20 located in the middle, two inner bottom surfaces 21 located on both sides of the upper semi-circular arc surface 20, two upper tongue-and-groove inclined surfaces 22 located on the outer sides of the two inner bottom surfaces 21, and two outer bottom surfaces 23 located on the outer sides of the two upper tongue-and-groove inclined surfaces 22. The outer bottom surface 23 and the inner bottom surface 21 are both horizontal planes parallel to the top surface of the cover plate structure block 2, and the inner bottom surface 21 is lower than the outer bottom surface 23. Several upper through holes 220 are opened at intervals and vertically upward along the length direction of the cover plate structure block 2, which correspond one-to-one with the lower through holes 120 on the supporting structure block 1. The upper through holes 220 are waist-shaped holes. One end face of the cover plate structure block 2 is provided with an upper tenon 24, and the other end face of the cover plate structure block 2 is provided with an upper tenon groove 25 that is adapted to the upper tenon 24.

[0024] When the cover plate structure block 2 and the supporting structure block 1 are joined together, the lower tongue-and-groove inclined surface 12 of the supporting structure block 1 and the upper tongue-and-groove inclined surface 22 of the cover plate structure 2 are bonded together by a cement mortar layer 3; the two outer bottom surfaces 23 of the cover plate structure block 2 are fitted one-to-one with the two outer top surfaces 13 of the supporting structure block 1, the two upper tongue-and-groove inclined surfaces 22 of the cover plate structure block 2 are fitted one-to-one with the two lower tongue-and-groove inclined surfaces 12 of the supporting structure block 1, the two inner bottom surfaces 21 of the cover plate structure block 2 are fitted one-to-one with the two inner top surfaces 11 of the supporting structure block 1, and the several upper through holes 220 on the cover plate structure block 2 and the several lower through holes 120 on the supporting structure block 1 form several grouting holes; the upper semi-circular arc surface 20 of the cover plate structure block 2 and the lower semi-circular arc surface 10 of the supporting structure block 1 are combined to form a complete circular cavity, and the diameter of the complete circular cavity is adapted to the outer diameter of the pipe.

[0025] The precast concrete encapsulation component for shallow-buried pipelines according to this utility model includes the following steps during the encapsulation construction of shallow-buried pipelines:

[0026] 1. Place the precast concrete encapsulation component support block 1 on the foundation soil of the pipe trench, and then connect the support block 1 one by one according to the length of each pipe section; during installation, the lower tenon 14 of the previous support block 1 and the lower tenon 15 of the next support block 1 nest with each other; after installation, clean the top surface of all support block 1, and then apply a layer of cement mortar 3 to the lower tongue and groove slope 12 of all support block 1; finally, place the pipe in the pipe trench formed by the lower semi-circular arc surface 10 of multiple support block 1.

[0027] 2. After completing the installation of pipelines and inspection wells, conduct a water tightness test on the pipelines in a timely manner;

[0028] 3. After the water tightness test is completed, install the cover plate structure block 2 of the precast concrete enclosure component; during installation, cover the top surface of the corresponding support structure block 1 with the cover plate structure block 2, so that the upper tongue and groove slope 22 of the cover plate structure block 2 is bonded to the corresponding support structure block 1 through the cement mortar layer 3; the upper tenon 24 of the previous cover plate structure block 2 and the upper tenon 25 of the next cover plate structure block 2 are nested with each other.

[0029] 4. After all the cover plate structural blocks 2 are installed, C20-C30 fine stone concrete is poured into all the grouting holes formed by the upper through hole 220 on the cover plate structural block 2 and the lower through hole 120 on the supporting structural block 1, and then vibrated to compact it.

[0030] 5. Directly carry out backfilling construction of pipeline trenches.

[0031] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A precast concrete encapsulation component for a shallow-buried pipeline, shaped like a cuboid and formed by a supporting structural block and a cover plate structural block; characterized in that, The supporting structure block is rectangular. The top surface of the supporting structure block includes a lower semi-circular arc surface in the middle, two inner top surfaces located on both sides of the lower semi-circular arc surface, two lower tongue-and-groove inclined surfaces located on the outer sides of the two inner top surfaces, and two outer top surfaces located on the outer sides of the two lower tongue-and-groove inclined surfaces. The outer top surface and the inner top surface are both horizontal planes parallel to the bottom surface of the supporting structure block, and the outer top surface is higher than the inner top surface. Several lower through holes are opened at intervals and vertically downward along the length direction of the supporting structure block on the lower tongue-and-groove inclined surface. A lower tenon protrudes from one end face of the supporting structure block, and a lower mortise protrudes from the other end face of the supporting structure block to fit the lower tenon. The cover plate structure block is a rectangular block. The bottom surface of the cover plate structure block includes an upper semi-circular arc surface in the middle, two inner bottom surfaces located on both sides of the upper semi-circular arc surface, two upper tongue-and-groove inclined surfaces located on the outer sides of the two inner bottom surfaces, and two outer bottom surfaces located on the outer sides of the two upper tongue-and-groove inclined surfaces. The outer bottom surface and the inner bottom surface are both horizontal planes parallel to the top surface of the cover plate structure block, and the inner bottom surface is lower than the outer bottom surface. Several upper through holes corresponding to the lower through holes on the supporting structure block are opened at intervals and vertically upward along the length direction of the cover plate structure block on the upper tongue-and-groove inclined surface. One end face of the cover plate structure block is provided with an upper tenon, and the other end face of the cover plate structure block is provided with an upper mortise that matches the upper tenon. When the cover plate structure block and the supporting structure block are joined together, the two outer bottom surfaces of the cover plate structure block are fitted with the two outer top surfaces of the supporting structure, the two upper tongue-and-groove bevels of the cover plate structure block are fitted with the two lower tongue-and-groove bevels of the supporting structure block, the two inner bottom surfaces of the cover plate structure block are fitted with the two inner top surfaces of the supporting structure block, and the several upper through holes on the cover plate structure block and the several lower through holes on the supporting structure form several grouting holes; the upper semi-circular arc surface of the cover plate structure block and the lower semi-circular arc surface of the supporting structure block are combined to form a complete circular cavity, and the diameter of the complete circular cavity is adapted to the outer diameter of the pipe.

2. The precast concrete encapsulation component for shallow-buried pipelines according to claim 1, characterized in that, A cement mortar layer is provided between the lower tongue-and-groove inclined surface of the supporting structural block and the upper tongue-and-groove inclined surface of the cover plate structural block; fine sand concrete is poured into several grouting holes.

3. The precast concrete encapsulation component for shallow-buried pipelines according to claim 1, characterized in that, Both the lower and upper through holes are waist-shaped holes.

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