【摘要】：作為全球性三大地質(zhì)災(zāi)害之一的邊坡失穩(wěn)嚴(yán)重危及到國家財產(chǎn)和人們的安全。而滑坡的發(fā)生和發(fā)展是一個累進(jìn)、漸變的破壞過程。因此,基于強(qiáng)度折減法和數(shù)值分析軟件,對滑坡的穩(wěn)定性進(jìn)行研究,有很重要的工程價值和社會意義。本文分別以簡易均質(zhì)滑坡和水井包滑坡為背景,運(yùn)用CAD三維軟件、ANSYS、Excel、FLAC3D、lstop和其他軟件對邊坡進(jìn)行三維建模、數(shù)值分析和安全預(yù)警,并形成一種流程可以運(yùn)用在實(shí)際滑坡中,并得出如下結(jié)論:1)通過對水井包滑坡定性和定量分析,通過工程地質(zhì)勘查,對滑坡的邊界、規(guī)模、形態(tài)特征、巖土體的結(jié)構(gòu)特征及近期變形特征進(jìn)行初步分析,之后通過數(shù)值模擬軟件對滑坡的穩(wěn)定性進(jìn)行計算,可以達(dá)到既定預(yù)期目的和現(xiàn)場實(shí)際需求。2)通過穩(wěn)定性宏觀分析和穩(wěn)定性計算分析,水井包滑坡在天然工況下整體處于穩(wěn)定狀態(tài),暴雨工況下滑坡處于欠穩(wěn)定狀態(tài),該滑坡可能發(fā)生失穩(wěn)下滑,沿滑坡前緣邊坡坡腳處剪出。確定該滑坡目前變形特征明顯,主要表現(xiàn)為滑動引起的房屋變形和地表開裂,目前處于強(qiáng)變形階段。3)由于強(qiáng)度折減法不必假設(shè)土條間的作用力和破壞面的位置和形狀,且能夠直接得到水井包滑坡安全系數(shù)和滑面,因此,該法能處理復(fù)雜幾何輪廓和邊界條件,有著廣泛的適用性和良好的應(yīng)用前景。
[Abstract]:As one of the three major geological disasters in the world, slope instability seriously endangers the national property and people's safety. The occurrence and development of landslide is a progressive and gradual process of failure. Therefore, it is of great engineering value and social significance to study the stability of landslide based on strength reduction method and numerical analysis software. In this paper, based on simple homogeneous landslide and Shuibao landslide, the 3D modeling, numerical analysis and safety early warning of slope are carried out by using CAD, ANSYS,Excel,FLAC3D,lstop and other software, respectively. And form a process that can be used in the actual landslide, and draw the following conclusions: 1) through the qualitative and quantitative analysis of the landslide, through the engineering geological exploration, the landslide boundary, scale, morphological characteristics, The structural characteristics and recent deformation characteristics of rock and soil are analyzed preliminarily, and then the stability of landslide is calculated by numerical simulation software. Through macroscopic analysis of stability and calculation and analysis of stability, the landslide of water well package is in a stable state under natural conditions, and the landslide is in a state of unstability under heavy rain. The landslide may be unstable and slid and cut out along the foot of the slope along the front edge of the landslide. It is determined that the deformation characteristics of the landslide are obvious at present, mainly manifested in the deformation of buildings and surface cracks caused by sliding, and are at the stage of strong deformation at present. (3) since the strength reduction method does not have to assume the position and shape of the soil force and the failure surface, The safety factor and the sliding surface of the landslide can be obtained directly. Therefore, this method can deal with complex geometric contours and boundary conditions, and has wide applicability and good application prospect.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P642.22

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本文編號：2429575