A Shallow Rainfall Landslide Early Warning Method Based on Water Content of Unsaturated Soil

A technology for soil moisture content and volumetric moisture content, which is used in alarms, measuring devices, soil material testing, etc., can solve problems such as insufficient consideration of physical and mechanical states and unsaturated failure of landslides, and inaccurate early warning. The effect of sex and science, simple indicators, strong applicability and accuracy

Inactive Publication Date: 2018-03-27
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

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  • A Shallow Rainfall Landslide Early Warning Method Based on Water Content of Unsaturated Soil
  • A Shallow Rainfall Landslide Early Warning Method Based on Water Content of Unsaturated Soil
  • A Shallow Rainfall Landslide Early Warning Method Based on Water Content of Unsaturated Soil

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Embodiment 1

[0055] Using the method provided by the invention, an example analysis of the shallow landslide early warning method based on the unsaturated soil volume water content 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 episeismic area of ​​the Wenchuan Earthquake. It is a typical Zhongshan canyon landform. The landslide is a coseismic landslide accumulation induced by the Wenchuan Earthquake. After the earthquake, many shallow landslides occurred under rainfall conditions. The landslides provided a large number of effective material sources for Yindongzigou and transformed them into debris flows, threatening the safety of life and property of 56 households with a population of 228 in the post-disaster reconstruction resettlement site of Mizokou Lianhe Village.

[0057] Step 1: On-the-spot investigation of the Yindongzigou landslide area, by collecting landsl...

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Abstract

The invention discloses a shallow rainfall landslide early warning method based on the water content of unsaturated soil, which belongs to the field of mountain disasters. According to the unsaturated soil mechanics theory, hydrology theory and landslide stability analysis theory, the present invention solves the stability coefficient of the landslide unsaturated soil in real time in combination with the real-time monitoring of the volumetric water content of the landslide soil, and establishes an early warning based on the stability state specified in the specification. Based on the indicators, a real-time early warning method for shallow rainfall landslides under unsaturated conditions is realized. The method of the invention is reliable in theory and method, scientific and convenient in calculation, and the early-warning index is based on specifications, which not only solves the problem of applicability of the unsaturated failure mechanics mechanism of shallow rainfall landslide in pre-alarming, but also improves the reliability, accuracy and scientificity of forecasting. The invention can directly provide technical support for stability analysis and monitoring and early warning of shallow rainfall landslide.

Description

technical field [0001] The invention relates to a shallow rainfall landslide early warning method based on the water content of unsaturated soil, which 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, using the critical value of rainfall 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 damage 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 specifications must be too conservative. The rainfall landslides based on this Stability analysis is obviously difficult...

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Application Information

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Patent Type & Authority Patents(China)
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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