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Shallow rainfall-induced landslide early-warning method based on unsaturated soil mass water content

A technology of soil water content and volume water content, which is applied to alarms, measuring devices, soil material testing, etc., can solve problems such as inaccurate early warning, insufficient consideration of physical and mechanical state and unsaturated damage of landslides, and achieve simple indicators , It has the effect of strong theory and science, applicability and accuracy

Inactive Publication Date: 2016-07-20
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is exactly at the deficiency of existing landslide early-warning technology, provides the early-warning method of shallow layer rainfall landslide under a kind of unsaturated condition, adopts rainfall single index more for existing landslide early-warning method, to landslide physical and mechanical state and landslide abnormality Insufficient consideration of saturation damage, resulting in inaccurate technical defects in early warning

Method used

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  • Shallow rainfall-induced landslide early-warning method based on unsaturated soil mass water content
  • Shallow rainfall-induced landslide early-warning method based on unsaturated soil mass water content
  • Shallow rainfall-induced landslide early-warning method based on unsaturated soil mass water content

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Embodiment 1

[0055] Using the method provided by the present invention, an example analysis of a shallow landslide early warning method based on the volumetric water content of unsaturated soil is carried out on the Yindongzigou landslide in Lianhe Village, Dujiangyan.

[0056] The Yindongzigou landslide is located in the Baisha River Basin of Dujiangyan City, the epicenter of the Wenchuan earthquake. After the earthquake, several shallow landslides occurred under rainfall conditions. The landslides provided a large amount of effective material sources for Yindongzigou and transformed them into debris flows, threatening the life and property safety of 56 households and a population of 228 in the post-disaster reconstruction resettlement site of Goukou Lianhe Village.

[0057] Step 1: Investigate the landslide area of ​​Yindongzigou on the spot, collect soil samples of landslide gravel, and test the physical and mechanical parameters of soil through indoor soil mechanics experiments (see Tab...

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Abstract

The invention discloses a shallow rainfall-induced landslide early-warning method based on unsaturated soil mass water content, which belongs to the field of mountain disasters. The shallow rainfall-induced landslide early-warning method adopts an unsaturated soil mechanical theory, a hydrology theory and a landslide stability analysis theory, and combines real-time monitored landslide soil mass volumetric water content for solving a stability coefficient of landslide unsaturated soil in real time, establishes an early-warning index based on stability conditions specified by specifications, and achieves real-time early warning of shallow rainfall-induced landslide under an unsaturated condition. The shallow rainfall-induced landslide early-warning method is reliable in theoretical method, scientific and convenient in calculation, establishes the early-warning index based on specifications, solves the problem of applicability of shallow rainfall-induced landslide unsaturated damage mechanical mechanism in early warning, and improves reliability, accuracy and scientificity of forecast. The shallow rainfall-induced landslide early-warning method can provide technical support for stability analysis and monitoring early warning of shallow rainfall-induced landslide directly.

Description

technical field [0001] The invention relates to a shallow rainfall landslide early warning method based on the water content of unsaturated soil, and belongs to the field of mountain disasters. Background technique [0002] At present, the early warning methods of rainfall and landslides are mostly based on real-time monitoring of rainfall, with rainfall critical value and "rainfall intensity + previous rainfall" or "rainfall intensity + rainfall duration" as the basic means, often ignoring the physical and mechanical mechanism of landslides and landslide unsaturated Destroy the condition. According to the latest research results, a large number of shallow rainfall landslides are destroyed under unsaturated conditions. Therefore, the stability analysis under the assumption that the soil is fully saturated in the landslide investigation and prevention code must be too conservative. The stability analysis is obviously difficult to meet the accuracy requirements. The failure ...

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Application Information

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IPC IPC(8): G08B21/10G01N33/24
CPCG01N33/246G08B21/10
Inventor 杨宗佶蔡焕丁朋朋乔建平黄栋
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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