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Swelling rock deep excavation cut slope supporting structure and supporting method

A technology of supporting structure and expansive rock, which is applied in foundation structure engineering, excavation, sheet pile wall, etc., can solve the problems of affecting slope stability and operation safety, difficulty in slope stability, and large damage scale.

Pending Publication Date: 2018-07-27
CHINA RAILWAY ENG CONSULTING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction and operation of expansive soil (rock) cuttings, shallow slides and collapses are prone to occur, and in some serious cases, deep landslides even occur. The scale of damage is large, which seriously affects the stability of slopes and operational safety. Stability has always been a difficult problem in subgrade design
[0003] At present, the design of expansive soil (rock) slopes follows the principle of combining gentle slope ratio, wide platform, reinforced slope toe and suitable slope protection, but it cannot effectively solve the phenomenon of landslides of expansive soil (rock) deep cutting slopes

Method used

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  • Swelling rock deep excavation cut slope supporting structure and supporting method
  • Swelling rock deep excavation cut slope supporting structure and supporting method
  • Swelling rock deep excavation cut slope supporting structure and supporting method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] figure 1 A schematic cross-sectional view of the support structure of the expansive rock-soil deep cutting slope in this embodiment is shown, which includes:

[0032] At least one lower slope platform 3, which is arranged at the lower part of the deep cutting slope;

[0033] At least one upper slope platform 3', which is arranged on the top of the deep cutting slope;

[0034] The width of the lower slope platform 3 and / or the upper slope platform 3' is 2.0-3.0m;

[0035] The middle slope platform 4 is arranged in the middle of the deep cutting slope, and the width of the middle slope platform 4 is 5-8m;

[0036] And anti-slide pile 5, it is arranged on described middle side slope platform 4; The top of described anti-slide pile 5 is fixedly connected with described middle side slope platform 4, and described anti-slide pile 5 is inserted into expansive soil or expansive rock Middle; wherein, the anti-slide pile 5 is a rectangular pile, and the side length of the pile...

Embodiment 2

[0043] Such as image 3 Shown, the present invention also provides a kind of support method of expansive rock-soil deep cutting slope, and it comprises the steps:

[0044] S1. Excavating in stages on the top of the deep cutting slope, setting the upper slope platform 3' and the slope support assembly 2;

[0045] S2. Set a middle slope platform 4 in the middle of the deep cutting slope, and set anti-slide piles 5 on the middle slope platform 4;

[0046] S3. Excavating in stages at the lower part of the deep cutting slope, setting the lower slope platform 3 and the slope support assembly 2;

[0047] S4. Construction of the pile-slab wall 1 at the toe of the deep cutting slope.

[0048] In summary, the present invention provides a method of "pile sheet wall reinforcement at the foot of the slope + gentle slope and anchor (cable) frame beam support + large platform in the middle of the slope and anti-slide piles on the platform" Expansive soil (rock) deep cutting slope support ...

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Abstract

The invention discloses a swelling rock deep excavation cut slope supporting structure and supporting method. The supporting structure comprises at least one lower plain stage of slope, at least one upper plain stage of slope, a middle plain stage of slope, slide-resistant piles and slope toe pile slab walls. The supporting structure is applicable to a swelling soil (rock) deep excavation cut slope (the height of the cut slope generally exceeds 15m). The slope supporting method particularly includes the steps of 'arranging the pile slab walls at slope toes for reinforcing, arranging a gentle slope, arranging an anchor rod (rope) frame beam support, arranging a party ledge in the middle of the slope and arranging the slide-resistant piles on the party ledge, so that collapse risk in the construction and operation process of the swelling soil (rock) deep excavation cut slope is effectively reduced, and stability of the swelling soil (rock) deep excavation cut slope is ensured.

Description

technical field [0001] The invention relates to the field of subgrade engineering, in particular to a support structure and a support method for expansive rock and soil deep cutting slopes. Background technique [0002] Expansive soil (rock) is widely distributed in my country. It has the characteristics of shrinkage and swelling when it dries, and its strength decays violently with the cycle of drying and wetting. It shrinks and cracks when it absorbs water, swells, softens, disintegrates, and loses water rapidly. During the construction and operation of expansive soil (rock) cuttings, shallow slides and collapses are prone to occur, and in some serious cases, deep landslides even occur. The scale of damage is large, which seriously affects the stability of slopes and operational safety. Stability has always been a difficult problem in subgrade design. [0003] At present, the design of expansive soil (rock) slope follows the principle of combining gentle slope ratio, wide...

Claims

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Application Information

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IPC IPC(8): E02D17/20E02D5/76
CPCE02D5/76E02D17/207
Inventor 周先才钱国玉杜文山向俊红祝振华曾祥福王晶韩涛
Owner CHINA RAILWAY ENG CONSULTING GRP CO LTD
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