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Multi-block slide calculation method for giant landslide

A technology of giant landslides and calculation methods, applied in computing, special data processing applications, instruments, etc., can solve problems such as inability to accurately search for multi-level sliding surfaces of giant landslides, and achieve the effect of promoting development

Active Publication Date: 2015-11-18
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] Aiming at the defect that the traditional numerical simulation cannot accurately search for the multi-level sliding surface of giant landslides, the present invention proposes a multi-block sliding calculation method for giant landslides by setting the tensile failure area as an empty unit based on the strength reduction method

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  • Multi-block slide calculation method for giant landslide
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  • Multi-block slide calculation method for giant landslide

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with engineering examples and accompanying drawings.

[0034] In a landslide in Li County, Sichuan Province, under the influence of rainfall and excavation at the foot of the slope, the stability of the landslide decreased, and the landslide started and produced a large deformation. The landslide deformation resulted in significantly increased slope cracks, the original ground cracks lengthened and widened, and multiple pinnate shear cracks formed in many places on the slope. A 60cm wide and 120cm deep tensile damage zone was formed at the top of the landslide. The landslide developed in the landslide deposits. The length of the landslide body is about 102m in the vertical direction, the average width in the horizontal direction is about 43m, the thickness of the landslide body is about 11m, and the scale is about 5×10 4 m 3 . The site investigation and comprehensive analysis determined that the l...

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Abstract

The invention relates to a multi-block slide calculation method for a giant landslide, and belongs to the field of geological disaster engineering. The method is used for landslide disaster stability evaluation and engineering prevention and control. The method comprises the steps of: (1) finding out a landslide region range, deformation features and hydrogeology and engineering geology conditions; (2) based on a finite element program, establishing a finite element numerical model of a side slope; (3) inputting formation mechanical parameters of the side slope; (4) inputting reduction parameters and physical and mechanical characters of landslide massif for performing finite element calculation; (5) determining a side slope failure region; (6) continuously reducing failure strength parameters until slide surfaces are communicated; (7) determining a tension failure zone of each stage of slide surface; (8) setting the tension failure zone as a null unit in the model; and (9) re-calculating a new numerical model and searching out multiple stages of slide surfaces. According to the multi-block slide calculation method for the giant landslide, provided by the invention, the multiple stages of slide surfaces of the giant landslide can be accurately searched out and an important basis is provided for giant multi-stage landslide stability evaluation and engineering prevention and control.

Description

technical field [0001] The invention relates to a giant landslide multi-block sliding calculation method, belongs to the field of geological disaster engineering, and is used for landslide disaster stability evaluation and engineering prevention and control. Background technique [0002] In landslide disasters, some large-scale landslides with long axes are composed of multiple small landslides due to the different characteristics of deformation time, direction, and mode. A multi-level landslide is formed as a whole. The deformation characteristics and mechanical properties of such multi-level landslides are particularly complex. The slope instability process is a gradual failure process from local to overall. With the transfer and adjustment of the stress concentration area, a new stress concentration area will be formed, and the sliding surface will be further extended and finally penetrated. Numerical simulation of multi-block sliding in giant landslides is a difficult...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈国庆黄润秋赵聪张国峰张岩
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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