本文關(guān)鍵詞：山區(qū)高速公路順層巖質(zhì)邊坡的穩(wěn)定性評(píng)價(jià)與研究　出處：《武漢理工大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 順層巖質(zhì)邊坡 開(kāi)挖擾動(dòng) 雨水入滲 時(shí)程效應(yīng)

【摘要】：近年，在我國(guó)西部、西南部一帶的山區(qū)高速工程中，出現(xiàn)了不少順層巖質(zhì)邊坡的失穩(wěn)破壞事故，，尤其是在前期的路塹邊坡開(kāi)挖修筑，或是后期運(yùn)營(yíng)的持續(xù)強(qiáng)降雨期間，給人民的生命財(cái)產(chǎn)安全造成大量損失。因此，如何正確評(píng)價(jià)分析順層巖質(zhì)邊坡的穩(wěn)定性，已成為當(dāng)今工程學(xué)科領(lǐng)域的研究熱點(diǎn)。 本文試從層狀巖體結(jié)構(gòu)特征出發(fā)，基于該類(lèi)巖體的受力變形機(jī)制及水理特性，研究了開(kāi)挖擾動(dòng)和持續(xù)強(qiáng)降雨入滲對(duì)順層巖質(zhì)邊坡穩(wěn)定性的影響。以湖北省恩來(lái)高速公路中的典型邊坡工點(diǎn)構(gòu)建分析模型，采用極限平衡理論與數(shù)值模擬相結(jié)合的方法，對(duì)模型的穩(wěn)定性進(jìn)行了較為深入的分析與探討。主要研究?jī)?nèi)容如下： （1）基于層狀巖體的結(jié)構(gòu)控制理論，通過(guò)對(duì)層狀巖體的結(jié)構(gòu)面形式、變形破壞機(jī)制的分析，以及順層巖質(zhì)邊坡的幾種主要破壞模型的研究，闡述了順層巖質(zhì)變邊坡的變形破壞機(jī)理。 （2）通過(guò)對(duì)層狀巖體結(jié)構(gòu)水理特性的分析，采用極限平衡理論，對(duì)順層巖質(zhì)邊坡的穩(wěn)定性進(jìn)行評(píng)判與分析。結(jié)合山區(qū)高速公路工程特征，對(duì)層狀巖體的雨水入滲效應(yīng)進(jìn)行了量化分析，對(duì)引其穩(wěn)定性影響兩大主要因素（開(kāi)挖擾動(dòng)與持續(xù)強(qiáng)降雨）及常用防治措施的作用機(jī)理予以分析和研究。 （3）在對(duì)恩來(lái)高速全線邊坡結(jié)構(gòu)及地勘資料的整理分析后，結(jié)合工程地質(zhì)結(jié)構(gòu)與路線設(shè)計(jì)方案，建立了順層巖質(zhì)邊坡典型工點(diǎn)分析模型。并依據(jù)現(xiàn)有地勘資料與相關(guān)工程規(guī)范，擬定巖層巖性參數(shù)。采用Flac3D數(shù)值模擬軟件，對(duì)開(kāi)挖過(guò)程的內(nèi)部應(yīng)力變形特征進(jìn)行對(duì)比分析。修正順層巖質(zhì)邊坡入滲各階段物理力學(xué)參數(shù)，采用強(qiáng)度折減法，對(duì)其在不同階段所表現(xiàn)出的極限穩(wěn)定狀態(tài)進(jìn)行對(duì)比分析。順層巖質(zhì)邊坡在受到開(kāi)挖擾動(dòng)或雨水入滲時(shí)，其內(nèi)部軟弱層面的對(duì)其結(jié)構(gòu)穩(wěn)定起到關(guān)鍵控制作用。
[Abstract]:In recent years, in the high speed project of mountainous area in the west and southwest of China, there have been many failure accidents of rock slope instability, especially in the early excavation and construction of cutting slope. Or during the period of continuous heavy rainfall, the safety of people's life and property will be greatly lost. Therefore, how to correctly evaluate and analyze the stability of bedding rock slope. It has become the research hotspot in the field of engineering. In this paper, based on the structural characteristics of layered rock mass, based on the mechanical deformation mechanism and hydrological characteristics of this kind of rock mass. The influence of excavation disturbance and continuous heavy rainfall infiltration on the stability of bedding rock slope is studied. The stability of the model is analyzed and discussed with the combination of limit equilibrium theory and numerical simulation. The main contents are as follows: Based on the structure control theory of layered rock mass, through the analysis of structural plane form, deformation and failure mechanism of layered rock mass and several main failure models of bedding rock slope. The deformation and failure mechanism of bedding rock slope is expounded. 2) through the analysis of the hydraulic characteristics of layered rock mass structure and the limit equilibrium theory, the stability of the bedding rock slope is evaluated and analyzed, combining with the engineering characteristics of highway in mountainous area. In this paper, the Rain Water infiltration effect of layered rock mass is quantitatively analyzed. The two main factors (excavation disturbance and continuous heavy rainfall) and the mechanism of common prevention measures are analyzed and studied. (3) after analyzing the slope structure and geological prospecting data of Enlai high speed highway, combined with engineering geological structure and route design scheme. The typical work point analysis model of bedding rock slope is established. According to the existing geological prospecting data and relevant engineering specifications, lithologic parameters of the strata are drawn up. Flac3D numerical simulation software is used. The characteristics of internal stress and deformation during excavation are compared and analyzed. The strength reduction method is adopted to modify the physical and mechanical parameters of bedding rock slope in each stage of infiltration. The limit stability of the rock slope in different stages is compared and analyzed. When the rock slope is disturbed by excavation or infiltrated by Rain Water, the internal weak layer plays a key role in controlling the stability of its structure.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U416.14

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