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Calculation method of maximum horizontal movement distance of debris flow in rock landslide

A technology of horizontal motion and calculation method, applied in the direction of design optimization/simulation, special data processing application, etc., can solve problems such as loss, and achieve the effect of improving the applicability of disaster prevention

Active Publication Date: 2020-09-08
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the debris flow formed by high-speed remote landslides, the original rock-soil structure of the slope has been completely destroyed, and a new flow structure has been re-formed. ) under long-distance movement, causing serious damage

Method used

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  • Calculation method of maximum horizontal movement distance of debris flow in rock landslide
  • Calculation method of maximum horizontal movement distance of debris flow in rock landslide
  • Calculation method of maximum horizontal movement distance of debris flow in rock landslide

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Effect test

Embodiment 1

[0034] In 1932, Swiss geologist Heim conducted research on the Elm landslide in the Swiss Alps in 1881, and proposed the equivalent friction coefficient of debris flow ( i.e. f e =H / L), the concept of remote movement distance of debris flow was first introduced in the research. Scheidegger (Scheidegger, A.E, On the prediction of the reach and velocity of catastrophic landslides, Rock Mechanics, 1973, 5(4), 231-236) through statistical analysis and landslide data, proposed that there is a relationship between the equivalent friction coefficient and the landslide volume The following functional relationship: lgf e =algV+b. Xu Jinghua (Hsu, K.J, Catastrophic Debris Streams (Sturzstroms) Generated by Rockfalls, GSA Bulletin, 1975, 86(1), 129-140) drew an intensity envelope diagram reflecting the mobility of debris flow, and proposed a hypermotion The concept of distance (excessive travel distance, L_e) is defined as L e =L-H / tan32°.

[0035] T.R.H.Davies (Davies, T.R.H, Spre...

Embodiment 2

[0095] After research, on the basis of the above-mentioned embodiment 1, the following optional other schemes can also be made, the calculation method for the maximum horizontal movement distance of the landslide debris flow provided by the embodiment 2 and the landslide debris provided by the embodiment 1 The calculation method of the maximum horizontal movement distance of the flow is basically the same, and the differences are explained as follows:

[0096] The potential rock landslide has a slope section after it becomes unstable. According to the slope angle of the slope section and the slope distance formula:

[0097] L 斜距 =L / cosα

[0098] The slope distance L of the slope section can be obtained 斜距 , so as to predict the threat area of ​​landslide debris flow.

[0099] Practice example

[0100] The method for calculating the maximum horizontal movement distance of landslide debris flows provided by the present invention is used below to calculate the maximum horizonta...

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Abstract

A Calculation method of maximum horizontal movement distance of debris flow in rock landslide relates to the technical field of geological disaster prevention and early war. The maximum horizontal motion distance of rock landslide debris flow is calculated and applied to rock landslide debris flow. The method Comprises the steps of obtaining parameters and calculating, and obtaining the landslideby surveying the parameters of the potential rock landslide body. The volume V of the detrital flow, The falling height H of the clastic mass predicts the disintegration degree of the rock mass afterits instability, predicts the maximum block diameter d, predicts the movement track after its instability, predicts the width B of the sliding section and the slope alfa, substitutes the obtained parameters into the formula for calculating the maximum horizontal movement distance, and thus measures and calculates the maximum movement distance of the clastic flow of the landslide. Establish a moreprecise slope. The calculation method of maximum movement distance of debris flow can be used to predict the dangerous range of landslide debris flow, which greatly improves the applicability of disaster prevention.

Description

technical field [0001] The invention relates to the technical field of geological disaster prevention and early warning research, in particular to a method for calculating the maximum horizontal movement distance of rock landslide debris flow. Background technique [0002] At present, global climate change has led to disordered weather systems and heavy rainfall in some areas, coupled with increasingly intense human engineering activities, resulting in frequent occurrence of geological disasters. High-speed and long-distance landslides not only have a wide range of influence after their own instability, but also form a long-distance "collapse→slide→flow" compound disaster geological body after breaking away from the parent rock, which can move an abnormally long distance and bring devastating damage and heavy casualties . [0003] In the debris flow formed by high-speed remote landslides, the original rock-soil structure of the slope has been completely destroyed, and a new...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 郑光许强彭双麒
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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