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Multi-block sliding calculation method for giant landslides

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: 2018-06-12
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 sliding calculation method for giant landslides
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  • Multi-block sliding calculation method for giant landslides

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Embodiment Construction

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

[0034] In a landslide in Li County, Sichuan Province, under the influence of rainfall and excavation of the slope toe, the stability of the landslide decreased, and the landslide started and caused large deformation. The deformation of the landslide resulted in a significant increase in the cracks on the slope surface, the original ground cracks were lengthened and widened, and multiple feather-shaped shear cracks were formed in many places on the slope. A tensile failure zone with a width of 60 cm and a depth of 120 cm was formed at the top of the landslide. The landslide developed in the collapsed landslide layer. The landslide body is about 102m long in the longitudinal direction, with an average width of about 43m in the horizontal direction, with a thickness of about 11m and a scale of about 5×10 4 m 3 . After field investigation and comprehensive analysis...

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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 multi-block sliding calculation method for giant landslides, belongs to the field of geological disaster engineering, and is used for landslide disaster stability evaluation and engineering prevention. Background technique [0002] In landslide disasters, some large-scale and long-axis landslides are composed of multiple small landslides due to the different characteristics of deformation time, direction, and mode. Each small landslide has a sequence of deformations and interacts with each other. The overall formation of multi-level landslides. The deformation characteristics and mechanical properties of such multi-stage 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 further extend and finally penetrate. Numerical s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 陈国庆王伟万亿张国峰赵聪
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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