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Stable excavating method for cracked weak rock road cutting high slope

A cutting and slope technology, applied in excavation, construction, infrastructure engineering, etc., can solve problems such as slope collapse, broken soft rock at the back of the wall, temporary slope exposure time, and construction that cannot be kept up in time, so as to avoid The effect of slope scour and avoiding engineering landslide accidents

Inactive Publication Date: 2008-03-26
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

But this method has the following disadvantages. After the excavation, the construction of the slope protection project is carried out, and the construction of the slope protection projects such as the follow-up retaining wall cannot be kept up in time. Frequent occurrence of landslides has caused great trouble to the construction of the slope protection project, and the project investment is also difficult to control; in addition, it is difficult to realize the design requirements of the lower slope by using the method of hopping excavation

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  • Stable excavating method for cracked weak rock road cutting high slope

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] With reference to Fig. 1, the high slope excavation and reinforcement method of broken weak rock quality road cutting of the present invention divides road cutting into upper excavation layer 10 and lower excavation layer 13, carries out layered excavation from top to bottom, and completes a After the excavation of the layer excavation layer, the slope protection engineering construction is carried out to the formed slope; before the excavation of the lower excavation layer 13, the steep slope at the lower part of the cutting is carried out pre-reinforcement construction. The technical measures of graded excavation, graded stabilization and slope toe pre-reinforcement before excavation are adopted to avoid slope erosion or further weathering during the excavation process, successfully solve the technical key of stable excavation, and solve the pro...

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Abstract

The present invention discloses process of excavating high road cutting slope of broken soft rock in railway and highway engineering. The excavation process features dividing the road cutting into several upper and lower excavation layers, excavating one layer by one layer from the top to the bottom, performing slope protection to each excavated layer, and pre-reinforcing the slope in the layer to be excavated. The excavation process of the present invention including the technological measures of stepped excavation, stepped stabilizing and pre-reinforcing can avoid erosion and weathering in the slope and stabilize the excavated slope.

Description

technical field [0001] The invention relates to an excavation and reinforcement method for a cutting slope, in particular to a stable excavation method for breaking a high cutting slope of a weak rock. Background technique [0002] Broken and weak rock formations are mainly mudstone, sandstone, and shale. Affected by large faults, the rock formations have well-developed joints, severe weathering and fracture, and poor self-stability. slump. The reinforcement of broken and weak rocky high cutting slopes often adopts the "upper protection and lower retaining" system, that is, anchor piles and retaining walls are installed at the lower part of the slope, and the slope surface adopts retaining walls, prestressed anchor cables, and anchors. Reinforcement of slope protection works such as piles, anchor rods, sprayed concrete nets, etc. At present, with the improvement of the degree of mechanized construction, the method of mechanical trench excavation is mainly used for road cut...

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Application Information

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IPC IPC(8): E02D17/00E02D17/20
Inventor 李海光李安洪周德培褚宇光
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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