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Initiative strengthening method specific to unstable slope

A slope and active technology, applied in the field of geotechnical engineering, can solve problems such as the lack of effective active reinforcement methods, and achieve the effect of avoiding a sharp drop in rock and soil strength, protecting from damage, and reducing the design reinforcement force

Inactive Publication Date: 2020-06-30
云南大永高速公路有限公司 +1
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an active reinforcement method for unstable slopes, which is used to solve the problem of lack of effective active reinforcement methods for potentially unstable slopes in the prior art

Method used

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  • Initiative strengthening method specific to unstable slope
  • Initiative strengthening method specific to unstable slope
  • Initiative strengthening method specific to unstable slope

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this embodiment, the slope test object is the slope of a certain expressway section. This experimental slope includes strongly weathered mudstone, which is purple-red with gray-green, mainly composed of clay minerals; it also contains thin-layered sandstone, Muddy cemented, sandy muddy structure, thin-layered structure, soft rock, developed joints and fissures, broken rock mass, easy to soften when exposed to water, easy to crack when dehydrated; core is in the form of fragments, fragments and gravel soil , after the slope is excavated, the anchor cable frame is used for reinforcement and protection, and the specific process is as follows:

[0032] S1. First, qualitatively analyze the experimental slope. In this example, the strongly weathered mudstone of the slope is thicker, with well-developed joints, broken rock mass, larger catchment area, and easy to soften when exposed to water. According to this lithological condition and Due to topographic and geomorphic con...

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Abstract

The invention discloses an initial strengthening method specific to an unstable slope. The initial strengthening method includes the steps that mechanics parameters obtained before and after softeningof the slope are measured, and whether initiative strengthening needs to be conducted or not is judged; a two-dimensional geological generalized model is established, and boundary conditions are set;rock and soil mechanics parameters obtained after softening are brought into the two-dimensional geological generalized model, a first safety coefficient F1 is calculated, and whether initiative strengthening needs to be conducted or not is judged; a strengthening manner and strengthening parameters of an anchor cable frame are set according to the two-dimensional geological generalized model; and initial rock and soil mechanics parameters are brought into the two-dimensional geological generalized model, a second safety coefficient F2 is calculated on the strengthened slope, and whether thesecond safety coefficient conforms to project stability or not is judged. By means of the initiative strengthening method, rock and soil physical and mechanics parameter changes obtained before and after excavation are taken into consideration, the anchor cable frame is immediately adopted for conducting initiative strengthening on the slope after excavation, the strength in the rock and soil initial state is sufficiently utilized, the phenomenon that the rock and soil strength is greatly reduced when the slope is deformed and softened after excavation is avoided, and slope plants can be effectively protected against damage.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an active reinforcement method for unstable slopes. Background technique [0002] Landslide geological disaster is a common problem in highway construction. Based on the preliminary investigation of highway design, it is necessary to fully understand its geotechnical characteristics in the feasibility study stage, and qualitatively study potential landslides and their impact on the project. During the construction process, strictly follow the norms and relevant standards, and at the same time assist in the design and guidance of experienced geotechnical engineers, problems such as landslides can be avoided. In the later stage of operation, potential landslides can also be prevented under normal circumstances. Generally speaking, from the perspective of engineering construction feasibility study stage, construction process and later operation stage, as long as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20E02D5/74E02D1/02
CPCE02D1/022E02D5/74E02D17/20Y02A10/23
Inventor 但路昭田明吴斌王建洪唐红波陈伟徐伟然邹云丽徐安航罗国成蒋文鹏汤华尹小涛袁从华吴振君邓琴秦雨樵梁栋才宋罡袁晖
Owner 云南大永高速公路有限公司
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