Protection structure for large-diameter sewage pressure pipe below newly-built municipal road

Abstract

The utility model relates to a protection structure for a large-diameter sewage pressure pipe below a newly-built municipal road, which comprises a combined reinforcing body and a hidden bridge structure, and the combined reinforcing body is composed of a cement mixing pile and a compaction grouting reinforcing body; the cement mixing pile is positioned below the sewage pressure pipe; the compaction grouting reinforcement bodies are arranged on the two sides of the sewage pressure pipe, and the lower ends of the compaction grouting reinforcement bodies are connected with the upper portion of the cement mixing pile; the hidden bridge structure comprises a cast-in-place pile, a plate beam and a butt strap. The two rows of cast-in-place piles are arranged on the two sides of the sewage pressure pipe correspondingly and located on the outer side of the combined reinforcing body; the plate beam is in a flat plate shape and is erected above the sewage pressure pipe, and the two ends of the plate beam are connected with the top ends of the cast-in-place piles. The butt strap is in a straight plate shape and located on the outer side of the cast-in-place pile, and the two ends of the butt strap are in lap joint with the top end of the cast-in-place pile and a road foundation respectively. And a road structure layer is arranged above the plate girder and the butt strap. According to the utility model, the influence of road load on the sewage pressure pipe can be reduced.

Description

Technical Field

[0001] The utility model relates to a building structure, in particular to a municipal road structure, and specifically to a protection structure for a large-diameter sewage pressure pipe under a newly built municipal road. Background Art

[0002] When newly built municipal roads often need to cross various underground pipelines, especially large-diameter sewage pressure pipes, their safety and stability are directly related to the road quality and the normal operation of the underground pipe network.

[0003] Currently, the main methods for reinforcing sewage pipelines under traditional municipal roads are as follows:

[0004] 1) Reinforcement with cement mixing piles. A corresponding number of cement mixing piles are arranged under the sewage pressure pipe to support the sewage pressure pipe. However, it cannot effectively solidify the soil around the sewage pressure pipe.

[0005] 2) Reinforcement by compaction grouting. Compaction grouting is carried out around the sewage pressure pipe to effectively solidify the soil around the sewage pressure pipe and enhance the compressive capacity. However, when the road load above the sewage pressure pipe increases sharply, it is easy for the sewage pressure pipe to be compressed and sink, causing accidents such as damage.

[0006] Therefore, it is urgently needed to be improved to fully meet the requirements of road traffic load changes and ensure the long-term stability and safety of the sewage pressure pipe. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a protection structure for a large-diameter sewage pressure pipe under a newly built municipal road in view of the existing problems in the protection of sewage pressure pipes under municipal roads, which can effectively improve the protection effect on the sewage pressure pipe, and moreover, has a simple structure, convenient construction, little impact on the surrounding environment, and is conducive to popularization.

[0008] The technical solution of the utility model is as follows:

[0009] A protection structure for a large-diameter sewage pressure pipe under a newly built municipal road includes a combined reinforcement body and a buried bridge structure;

[0010] The combined reinforcement body is composed of a cement mixing pile and a compaction grouting reinforcement body; the cement mixing pile is located under the sewage pressure pipe; the compaction grouting reinforcement body is arranged on both sides of the sewage pressure pipe and wraps the sewage pressure pipe, and its lower end is connected to the upper part of the cement mixing pile;

[0011] The sunken bridge structure includes cast-in-place piles, slab beams and approach slabs; the cast-in-place piles are arranged in two rows, respectively on both sides of the sewage pressure pipe and outside the combined solidification body; the slab beam is flat and is erected above the sewage pressure pipe, and its two ends are connected to the tops of the cast-in-place piles; the approach slab is straight and is located outside the cast-in-place pile, its proximal end is lapped on the cast-in-place pile, and its distal end is lapped on the road foundation;

[0012] A road structural layer is provided above the slab beam and the approach slab.

[0013] Further, there are multiple cement mixing piles arranged in a plum blossom shape.

[0014] Further, the compaction grouting solidification body is square.

[0015] Further, the slab beam is a precast hollow slab, and a crushed stone cushion layer is provided between it and the compaction grouting solidification body.

[0016] Further, it also includes a capping beam, which is arranged at the top of the cast-in-place pile and connects the slab beam and the approach slab at the same time.

[0017] Further, it also includes a bolster beam, which is arranged between the distal end of the approach slab and the road foundation.

[0018] The beneficial effects of the present utility model:

[0019] By combining the combined solidification body with the sunken bridge structure, the influence of the road load on the large-diameter sewage pressure pipe is effectively dispersed and isolated, significantly improving the safety and stability of the pipeline.

[0020] 2. Adopting precast components and modular design simplifies the construction process and improves the construction efficiency.

[0021] 3. The construction of the cement mixing piles and compaction grouting has less influence on the surrounding environment, meeting the requirements of green environmental protection in modern engineering construction.

[0022] 4. It has good long-term stability, reducing the later maintenance cost and frequency. Description of the Drawings

[0023] Figure 1 is the plan view of the present utility model.

[0024] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0025] Figure 3 is Figure 2 the sectional view taken along line B-B in

[0026] Among them, 1 - cast-in-place pile; 2 - cement mixing pile; 3 - sewage pressure pipe; 4 - compaction grouting hole; 5 - compaction grouting solidified body; 6 - capping beam; 7 - inner platform of capping beam; 8 - outer platform of capping beam; 9 - gravel cushion; 10 - slab beam; 11 - approach slab; 12 - sleeper beam; 13 - road structure layer. Detailed implementation mode

[0027] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0028] As Figures 1 to 3 shown.

[0029] A protection structure for a large-diameter sewage pressure pipe under a newly built municipal road, comprising a combined solidified body and a hidden bridge. The diameter of the sewage pressure pipe 3 is 2m.

[0030] The combined solidified body is composed of a cement mixing pile 2 and a compaction grouting solidified body 5. There are multiple cement mixing piles 2, which are located under the sewage pressure pipe 3. The compaction grouting solidified body 5 is located on both sides of the sewage pressure pipe 3 and covers the sewage pressure pipe. Its lower end is connected to the cement mixing pile solidified body 2, so that the two form an integral reinforcement structure, enhancing the overall stability of the soil around the sewage pressure pipe. Among them, the height of the cement mixing pile is about 8m, its pile diameter is about 50cm, and the pile spacing is about 1.2m, arranged in a plum blossom shape, improving the bearing capacity and overall stability of the cement mixing pile solidified body. The height of the compaction grouting holes 4 of the compaction grouting solidified body 5 is about 3.5m, its hole diameter is about 5cm, and the spacing is 1m, arranged in a square shape. Thus, it can ensure the uniform distribution of the slurry in the reinforcement area, avoid too much or too little slurry in some areas, and ensure the consistency and stability of the reinforcement effect around the pipeline.

[0031] The hidden bridge structure is in the shape of a single-span simply supported structure, including cast-in-place piles 1, capping beams 6, slab beams 10, approach slabs 11, etc.

[0032] There are two rows of cast-in-place piles 1, which are located on both sides of the sewage pressure pipe 3 and outside the compaction grouting solidified body 5. The capping beam 6 is arranged at the upper end of the cast-in-place pile 1 and is higher than the sewage pressure pipe. The slab beam 10 is in a flat shape, and its two ends are respectively lapped on the inner platform 7 of the capping beam, covering the sewage pressure pipe. At the same time, a gravel cushion 9 is provided between the slab beam and the compaction grouting solidified body 5. The gravel cushion 9 is a leveling layer, which can ensure the smooth connection between the slab beam and the compaction grouting solidified body.

[0033] The approach slab 11 is in a straight shape, its proximal end is lapped on the outer platform 8 of the capping beam, and its distal end is lapped on the road foundation. Moreover, a sleeper beam 12 is provided below the distal end of the approach slab, so that it is smoothly transitioned with the road.

[0034] Thus, the sunken bridge structure is spanned over the sewage pressure pipe, and a road structure layer is arranged thereon, which not only meets the traffic demand, but also effectively isolates the direct action of the road load on the sewage pressure pipe. In this embodiment, the height of the cast-in-place pile 1 is about 31 m, and its pile diameter is about 80 cm. The height of the capping beam 6 is about 1 m, and its width is about 1 m. The slab beam 10 is a precast hollow slab, its length is about 6.44 m, its thickness is about 45 cm, and its width is about 1 m.

[0035] By arranging the combined reinforcement body and the sunken bridge structure around the large-diameter sewage pressure pipe, the utility model effectively disperses and isolates the influence of the road load on the sewage pressure pipe, and improves the safety and stability of the pipeline. At the same time, the utility model can also simplify the construction process, reduce the influence on the surrounding environment, and improve the construction efficiency.

[0036] Parts not involved in the utility model are the same as or can be implemented by the prior art.

Claims

1. A protective structure for a large-diameter sewage pressure pipe under a newly built municipal road, comprising a combined reinforcement body and a concealed bridge structure, characterized in that: The combined reinforcement body is composed of a cement mixing pile and a compaction grouting reinforcement body; the cement mixing pile is located below the sewage pressure pipe; the compaction grouting reinforcement body is arranged on both sides of the sewage pressure pipe and covers the sewage pressure pipe, and the lower end of the compaction grouting reinforcement body is connected to the upper part of the cement mixing pile; The concealed bridge structure includes cast-in-place piles, plate beams and lap boards; the cast-in-place piles are arranged in two rows, respectively arranged on both sides of the sewage pressure pipe and located outside the combined reinforcement body; the plate beam is in the shape of a flat plate, erected above the sewage pressure pipe, and its two ends are connected to the top of the cast-in-place piles; the lap board is in the shape of a straight plate, located outside the cast-in-place piles, with its proximal end overlapped on the cast-in-place piles and its distal end overlapped on the road foundation; A road structure layer is arranged above the plate beam and the butt plate.

2. The protective structure for a large-diameter sewage pressure pipe under a newly built municipal road according to claim 1 is characterized in that: The cement mixing piles are multiple and arranged in a plum blossom shape.

3. The protective structure for a large-diameter sewage pressure pipe under a newly built municipal road according to claim 1 is characterized in that: The compaction grouting reinforcement body is square.

4. The protective structure for a large-diameter sewage pressure pipe under a newly built municipal road according to claim 1 is characterized in that: The plate beam is a prefabricated hollow plate, and a crushed stone cushion layer is provided between the plate beam and the compaction grouting reinforcement body.

5. The protective structure for a large-diameter sewage pressure pipe under a newly built municipal road according to claim 1 is characterized in that: It also includes a cap beam, which is arranged on the top of the cast-in-place pile and simultaneously connects the plate beam and the strapping plate.

6. The protective structure for a large-diameter sewage pressure pipe under a newly built municipal road according to claim 1 is characterized in that: It also includes a sleeper beam, which is arranged between the far end of the buttress plate and the road foundation.

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