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A kind of early warning method and application of rock landslide on sliding surface of rock layer

A layer sliding and sliding surface technology, applied in the field of rock landslide prevention and control, can solve problems such as landslides that cannot be warned of other sliding surfaces, and achieve the effect of strong applicability

Active Publication Date: 2021-03-23
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The early warning method for rock landslides in red bed areas disclosed in this patent document describes the early warning model and critical value for rock landslides in red bed areas, but this model can only be used for weak interlayer sliding surfaces in red bed areas, other It is not applicable in the region, and it is not possible to warn of landslides on other sliding surfaces

Method used

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  • A kind of early warning method and application of rock landslide on sliding surface of rock layer
  • A kind of early warning method and application of rock landslide on sliding surface of rock layer
  • A kind of early warning method and application of rock landslide on sliding surface of rock layer

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Embodiment 1

[0046] A method for early warning of rock landslides at the sliding surface of rock formations, comprising the following steps:

[0047] a. Through on-site investigation, find the position of the sliding surface of the landslide, determine the sliding surface at the rock layer, and then analyze and determine the friction angle of the sliding surface according to the value method of the structural surface friction angle in the GB50330-2013 technical specification for building slope engineering Specifically, it means that the sliding surface of the rock layer is relatively flat and smooth, and the bonding condition is poor. Under rainfall conditions, the structural surface is immersed in water at a lower value. The rock layer is a hard structural surface, and the shear strength of the hard structural surface is affected by the roughness of the structural surface, bonding condition, Filling status, continuity and external environmental influences, determine the friction angle of ...

Embodiment 2

[0077] Below in conjunction with specific case the embodiment of the present invention is described in detail:

[0078] Limestone Landslide in Chongqing: At 10 am on May 24, 2007, a landslide occurred in the Shazikou section of Pengshui County, Chongqing City. The lithology of the landslide is limestone. The sliding surface is the limestone rock layer interface, the surface is relatively straight and smooth, slightly undulating, the degree of bonding is poor, there are a few local dissolution cracks, the depth is shallow, generally 3-5cm, filled with clay, the shear strength is relatively high, and the softening of water The effect is limited, and the slope of the sliding surface is 29°.

[0079] Guizhou Dolomite Landslide: On August 27, 2015, a landslide occurred in Yingping Village, Daoping Town, Fuquan City, Qiannan Prefecture, Guizhou Province. The lithology of the landslide is clayey siltstone, silty slate and dolomite. The sliding surface is the interface between clay...

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Abstract

The invention discloses an early-warning method of a rocky landslide on a stratum bedding slip surface and belongs to the field of rocky landslide control. The early-warning method is characterized bycomprising the steps that a, the position of the landslide on the slip surface is found out, and the value of a frictional angle of the stratum bedding slip surface is determined as 18 degrees; b, the gradient alpha of a landslide body, the area A of the landslide body, the area A of the upper side of the landslide body and the gradient beta of a steep slope at the rear edge of the upper sideof the landslide body are determined through field surveying and mapping, and rainfall is monitored; c, early-warning discrimination factors P of the landslide are determined; and d, the landslide possibility is quite high when P>5.6, high when 4.4<P<=5.6, medium when 3.2<P<=4.4 and low when P<=3.2. According to the early-warning method, a comprehensive judgment is made on the occurrence of the landslide, a precise early-warning calculation model of the rocky landslide on the stratum bedding slip surface is established, and the early-warning effect on the rocky landslide on the stratum beddingslip surface is improved.

Description

technical field [0001] The invention relates to the technical field of prevention and control of rock landslides, in particular to an early warning method for rock landslides on sliding surfaces of rock layers and an application thereof. Background technique [0002] According to the material composition, origin, nature and failure mode of the sliding surface of rock landslide, the sliding surface of rock landslide can be divided into weak interlayer sliding surface, rock layer sliding surface and joint surface sliding surface. The surface of the sliding surface at the rock layer is relatively straight and smooth, with slight undulations, and the contact surface of the rock layer is relatively broken. The reason for the formation of the sliding surface is analyzed. The sliding surface of the rock layer is formed under the comprehensive action of diagenesis, structure and supergenesis. [0003] The possibility of landslides occurring on the sliding surface of the rock layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10G08B31/00
CPCG08B21/10G08B31/00
Inventor 余斌马二龙李阳春
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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