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Underpinning structure on subway tunnel and construction method thereof

A construction method and technology for tunnels, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as tunnel 1 deformation and platform settlement, and achieve the effects of slowing settlement, accelerating construction speed, and strengthening connection strength.

Inactive Publication Date: 2020-06-09
广东省构建工程建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the friction between the side of the supporting pile 2 and the soil layer is insufficient, the cap will still settle, which will cause the deformation of the tunnel 1

Method used

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  • Underpinning structure on subway tunnel and construction method thereof
  • Underpinning structure on subway tunnel and construction method thereof
  • Underpinning structure on subway tunnel and construction method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 2

[0049] like figure 2 , 3 , 4, 5, an underpinning structure on a subway tunnel 1 and a construction method thereof, including the following construction steps:

[0050] Step 1: Drill holes on both sides of the tunnel 1 to form pile holes 19;

[0051] Step 2: Put the guide rod 9 in the pile hole 19, and the guide rod 9 is slidably connected with the drilling unit 10;

[0052] Among them, the guide rod 9 is a square steel column, and the steel column is provided with T-shaped chute 11 on opposite sides, the chute 11 is arranged along the length of the guide rod 9, and the drilling unit 10 is slidably connected in the chute 11; Specifically, the drilling unit 10 includes a T-shaped block-shaped sliding block 12, an electric cylinder 13 fixed to the sliding block 12, and a drilling rig 14 connected to the electric cylinder 13. The sliding block 12 is slidably connected to the chute 11, and the drilling rig 14 is fixed. On the piston rod of the electric cylinder 13, the orientat...

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PUM

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Abstract

The invention discloses an underpinning structure on a subway tunnel. The underpinning structure comprises supporting piles arranged on two sides of the tunnel, a bearing sheet is arranged at the upper ends of the supporting piles, reinforcing shafts are integrally connected to the outer surfaces of the supporting piles, and the reinforcing shafts extend into soil layer around the supporting piles. The underpinning structure has the advantages that the reinforcing shafts extend into the soil layer around the supporting piles, and the connection strength of the supporting piles and the soil layer around the supporting piles is further enhanced, therefore, when the supporting piles are settled, the soil layer make contact with the supporting piles provides supporting force for the supportingpiles, and the settlement effect of the supporting piles is slowed down.

Description

technical field [0001] The invention relates to the technical field of underpinning, in particular to an underpinning structure on a subway tunnel and a construction method thereof. Background technique [0002] Currently, if figure 1 As shown in the figure, in order to avoid the deformation of the tunnel 1 caused by the excessive load above the subway tunnel 1, it is necessary to set support piles 2 on both sides of the tunnel 1, and then set the platform plate 3 on the upper end of the support pile 2, and then set the platform plate 3 on the platform plate 3. Set the road. When vehicles and pedestrians pass on the road, their loads are transmitted to the deep foundation through the deck plate 3 and the support piles 2, thereby avoiding excessive loads above the tunnel 1, and thus playing the role of unloading. However, when the friction force between the side surface of the supporting pile 2 and the soil layer is insufficient, the bearing platform will still settle, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/28E21B7/04
CPCE21B7/04E21D11/10E21D11/28
Inventor 李永文徐华勇余丹吴永生万霞林玉丹
Owner 广东省构建工程建设有限公司