Reinforcing and protecting structure for power supply high-pressure pipeline of underpass tunnel

Abstract

The utility model relates to a reinforcing and protecting structure for a power supply high-pressure pipeline of an underpass tunnel, which comprises a reinforcing body and a gravity type retaining wall, the longitudinal section of the reinforcing body is n-shaped, and the reinforcing body comprises two vertical plates and a transverse plate; the two ends of the transverse plate are respectively connected with the upper ends of the vertical plates; the vertical plates and the transverse plates are formed by mutually meshing MJS piles; the reinforcing body is arranged above a power supply high-pressure pipeline of the transverse underpass tunnel in a spanning manner, is positioned below the tunnel and is in the same direction as the tunnel; the gravity type retaining walls are located on the two sides of the tunnel and located above the power supply high-pressure pipeline, are formed by MJS piles in an engaged mode and can close notches, caused by the fact that the power supply high-pressure pipeline penetrates through, in the enclosure structures on the two sides of the tunnel. According to the utility model, effective reinforcement and protection can be provided for the power supply high-pressure pipeline, the construction difficulty can be reduced, excavation is not needed, and favorable conditions are created for smooth construction.

Description

Technical Field

[0001] The utility model relates to a building structure, in particular to a tunnel construction structure, specifically a reinforcement and protection structure for power supply high-voltage pipelines under a tunnel. Background Technique

[0002] With the development and expansion of cities, there are more and more underground projects such as open-cut tunnels and pipe galleries. During the construction process, it is often encountered that power supply high-voltage pipelines pass under the tunnel. How to effectively reinforce and protect the power supply high-voltage pipelines passing under while ensuring the safety of tunnel construction is an important challenge in the project.

[0003] At present, the traditional reinforcement and support system in tunnel construction is steel bracket support and steel sheet pile support. However, the construction of the steel bracket support method is difficult, and the effect is not ideal, which affects the construction progress and increases the construction cost. And the steel sheet pile support requires excavation. However, when the power supply high-voltage pipeline crosses the foundation pit, excavation construction cannot be carried out. Therefore, the steel sheet pile support method cannot be adopted, resulting in serious impact on the project construction.

[0004] Therefore, it is urgently needed to be improved to better meet the construction requirements. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems encountered in the construction of power supply high-voltage pipelines passing under the tunnel at present, and provide a reinforcement and protection structure for power supply high-voltage pipelines under the tunnel, which can effectively solve the reinforcement and protection problems of power supply high-voltage pipelines passing under without excavation, and can reduce the construction difficulty and improve the construction efficiency.

[0006] The technical solution of the utility model is as follows:

[0007] A reinforcement and protection structure for power supply high-voltage pipelines under a tunnel, including a reinforcement body and a gravity retaining wall. The longitudinal section of the reinforcement body is in the shape of a "door", including two vertical plates and one horizontal plate; both ends of the horizontal plate are respectively connected to the upper ends of the vertical plates; the vertical plates and the horizontal plate are both formed by mutually occluding MJS piles; the reinforcement body straddles the power supply high-voltage pipelines passing under the tunnel horizontally and is located below the tunnel and in the same direction as the tunnel;

[0008] The gravity retaining wall is located on both sides of the tunnel and above the power supply high-voltage pipelines, and is formed by mutually occluding MJS piles, and can close the gaps caused by the power supply high-voltage pipelines passing through on the retaining structures on both sides of the tunnel.

[0009] Furthermore, the MJS piles of the horizontal plate are 360° round piles, with a height of 1.7 m and a pile diameter of 2 m.

[0010] Further, the MJS pile of the vertical plate is a 360° circular pile with a height of 5 m and a pile diameter of 2 m.

[0011] Further, the MJS pile of the gravity retaining wall is a 360° circular pile with a height of 5.5 m and a pile diameter of 2 m.

[0012] Further, the tunnel is provided with a cushion layer and a floor from bottom to top; the transverse plate of the reinforced body is connected to the cushion layer.

[0013] Further, tunnel side wall retaining walls are provided on both sides of the tunnel; the gravity retaining wall is located outside the tunnel side wall retaining wall.

[0014] Advantages of the present utility model:

[0015] 1. Through the synergistic effect of the reinforced body and the gravity retaining wall, it is possible to provide stable and reliable reinforcement protection for the power supply high-voltage pipeline passing under, greatly reducing the risk of damage to the pipeline during the construction process, and at the same time enhancing the stability of the tunnel foundation pit and effectively preventing safety accidents such as collapses.

[0016] 2. It has good adaptability to different geological conditions and can flexibly adjust design parameters according to actual situations to ensure ideal reinforcement and support effects in various complex geological environments.

[0017] 3. The impact of the MJS pile construction process on the surrounding environment is small, meeting the requirements of green environmental protection in modern engineering construction.

[0018] 4. The system is simple, with high work efficiency and low construction difficulty, and has high popularization value. Description of the drawings

[0019] Figure 1 is the plan view of the present utility model.

[0020] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0021] Figure 3 is Figure 1 the sectional view taken along line B-B in

[0022] Among them, 1 - transverse plate; 2 - vertical plate; 3 - gravity retaining wall; 4 - power supply high-voltage pipeline; 5 - cushion layer; 6 - floor; 7 - tunnel side wall retaining wall; 8 - retaining structure. Specific embodiments

[0023] The present utility model will be further described below with reference to the drawings and embodiments.

[0024] As Figures 1 to 3 shown,

[0025] A reinforcement and protection structure for a high-voltage power supply pipeline passing under a tunnel, comprising a reinforced body and a gravity retaining wall 3.

[0026] The tunnel is successively provided with a cushion layer 5 and a bottom plate 6 from bottom to top, and tunnel side wall retaining walls 7 are provided on both sides thereof, and a retaining structure 8 is further provided outside the tunnel side wall retaining walls 7. The high-voltage power supply pipeline 4 passes under the tunnel and intersects with the tunnel direction. At the same time, due to construction impossibility, a notch is provided on the retaining structure 8 at the crossing of the high-voltage power supply pipeline 4.

[0027] The reinforced body includes a horizontal plate 1 and two vertical plates 2. Both ends of the horizontal plate 1 are respectively connected to the upper ends of the vertical plates 2, forming a structure with a "door" shape in the longitudinal section. The vertical plates 2 and the horizontal plate 1 are both formed by the interlocking of MJS (Metro Jet System all-round high-pressure jet grouting method) piles. Among them, the MJS piles of the vertical plates 2 are 360° round piles, with a height of about 5 m and a pile diameter of about 2 m. The MJS piles of the horizontal plate 1 are 360° round piles, with a height of about 1.7 m and a pile diameter of about 2 m.

[0028] The reinforced body straddles the high-voltage power supply pipeline 4 passing under the tunnel, and is located below the tunnel and in the same direction as the tunnel. Among them, the pile tops of the MJS piles of the horizontal plate 1 and the vertical plates 2 are both the bottom of the foundation pit, that is, the position at the bottom of the tunnel cushion layer 5, with an elevation of 0.8 m. At the same time, the horizontal plate 1 is about 0.8 m above the high-voltage power supply pipeline 4, realizing the reinforcement of the soil above the high-voltage power supply pipeline 4. The vertical plates 2 are about 1.4 m from both sides of the high-voltage power supply pipeline 4, and the reinforcement width on each side is about 2.75 m, which can reinforce the soil on both sides of the high-voltage power supply pipeline 4. Thus, the reinforced body can protect the high-voltage power supply pipeline 4 from the disturbance of later foundation pit excavation and earth backfilling.

[0029] The gravity retaining wall 3 is formed by the interlocking of MJS piles, and is located outside the tunnel side wall retaining walls 7 and above the high-voltage power supply pipeline 4. The MJS piles of the gravity retaining wall 3 are 360° round piles, with a height of about 5.5 m and a pile diameter of about 2 m, and its pile top is the existing ground, that is, the position after removing the original asphalt pavement and water stable layer, with an elevation of 4.4 m. Thus, the gravity retaining wall 3 can close the notch on the retaining structure 8, enhance the retaining effect, and can reinforce the soil on both sides of the tunnel, increasing the stability of the foundation pit support.

[0030] In the present utility model, the top elevation of the high-voltage power supply pipeline is -1.7 m, and the area occupied by the high-voltage power supply pipeline in the foundation pit is 14 m × 28 m. The range of the reinforced body is 14 m × 28 m. The range of the gravity retaining wall is 2 × (4 m × 14 m).

[0031] The present utility model has the following advantages:

[0032] 1. Effectively guarantee construction safety: Through the synergistic effect of the MJS portal reinforcement and the MJS gravity retaining wall, it can provide stable and reliable reinforcement protection for the power supply high-voltage pipeline under the tunnel, greatly reducing the risk of damage to the pipeline during construction. At the same time, it enhances the stability of the tunnel foundation pit and effectively prevents safety accidents such as collapses.

[0033] 2. Adapt to complex geological conditions: This combined system has good adaptability to different geological conditions and can flexibly adjust design parameters according to the actual situation to ensure ideal reinforcement and support effects in various complex geological environments.

[0034] 3. Green and environmental protection: The MJS pile construction process has less impact on the surrounding environment, meeting the requirements of green and environmental protection in modern engineering construction.

[0035] 4. Has popularization value: The system is simple, the construction difficulty is small, the work efficiency is fast, and it is suitable for popularization.

[0036] For the parts not involved in this utility model, they are the same as the prior art or can be implemented by using the prior art.

Claims

1. A reinforcement protection structure for a power supply high-voltage pipeline under a tunnel, comprising a reinforcement body and a gravity retaining wall, characterized in that: The longitudinal section of the reinforcement body is in the shape of a "door", and includes two vertical plates and a horizontal plate; the two ends of the horizontal plate are respectively connected to the upper ends of the vertical plates; the vertical plates and the horizontal plates are formed by MJS piles interlocking with each other; the reinforcement body is arranged across the high-voltage power supply pipeline that passes through the tunnel horizontally, and is located below the tunnel and in the same direction as the tunnel; The gravity retaining wall is located on both sides of the tunnel and above the high-voltage power supply pipeline. It is formed by MJS piles interlocking with each other and can close the gaps on the retaining structures on both sides of the tunnel caused by the passage of the high-voltage power supply pipeline.

2. The reinforcement and protection structure for the power supply high-voltage pipeline under the tunnel according to claim 1 is characterized in that: The MJS piles of the horizontal plate are 360° circular piles with a height of 1.7 m and a pile diameter of 2 m.

3. The reinforcement and protection structure for the power supply high-voltage pipeline under the tunnel according to claim 1 is characterized in that: The MJS piles of the vertical slabs are 360° circular piles with a height of 5m and a pile diameter of 2m.

4. The reinforcement and protection structure for the power supply high-voltage pipeline under the tunnel according to claim 1 is characterized in that: The MJS piles of the gravity retaining wall are 360° circular piles with a height of 5.5m and a pile diameter of 2m.

5. The reinforcement and protection structure for the power supply high-voltage pipeline under the tunnel according to claim 1 is characterized in that: The tunnel is provided with a cushion layer and a bottom plate from bottom to top; the transverse plate of the reinforcement body is connected with the cushion layer.

6. The reinforcement and protection structure for the power supply high-voltage pipeline under the tunnel according to claim 1 is characterized in that: Tunnel side wall retaining walls are arranged on both sides of the tunnel; the gravity retaining wall is located outside the tunnel side wall retaining walls.

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