【摘要】：本文針對傳統(tǒng)強(qiáng)度折減法單一不合理折減方式以及FLAC3D軟件在非飽和滲流分析上存在局限性兩個方面所存在的不足進(jìn)行優(yōu)化,通過考慮衰減次序間隔的雙參數(shù)強(qiáng)度折減法和自編孔壓場轉(zhuǎn)換程序(seep/w to flac3d)對某滑坡案例進(jìn)行計算分析,得到了庫岸邊坡在庫水位作用下的滲流場和穩(wěn)定性變化規(guī)律(考慮庫水位變化速率影響),為今后涉水邊坡的分析、評價和防治提供了一定借鑒,同時也對FLAC3D軟件在非飽和滲流分析方面的開發(fā)應(yīng)用做了進(jìn)一步的探索。本文研究主要取得如下成果:(1)基于理論分析及前人研究成果推導(dǎo)了考慮c、?衰減次序間隔的雙參數(shù)強(qiáng)度折減解析公式,該式更加符合邊坡巖土體實(shí)際的破壞機(jī)制,為更加準(zhǔn)確的評價邊坡穩(wěn)定性問題提供了參考。殘余強(qiáng)度的確定始終具有一定的不確定性,本文得到的衰減次序間隔系數(shù)a也對解釋殘余粘聚力和殘余內(nèi)摩擦角的取值及彈性評價邊坡穩(wěn)定性提供了理論依據(jù)。(2)本文通過二維滲流計算軟件GeoStudio對某滑坡案例進(jìn)行了分析研究,得到了庫水位升降作用下岸坡在不同滲流時刻的滲流場和穩(wěn)定性變化規(guī)律。計算結(jié)果表明:庫水位上升階段,邊坡穩(wěn)定性安全系數(shù)先降低后升高,并且在安全系數(shù)最小時對應(yīng)存在最危險水位高度;而在庫水位下降階段,邊坡安全系數(shù)則整體呈現(xiàn)逐漸減小的變化趨勢;探討了庫水位升降速率的不同對岸坡穩(wěn)定性的影響規(guī)律,計算結(jié)果表明:庫水位上升期間,庫水上升速率增加或減小時,岸坡穩(wěn)定性安全系數(shù)分別增大和減小;庫水位下降期間,庫水下降速率增加或減小時,岸坡穩(wěn)定性安全系數(shù)分別減小和增大。(3)本文通過對GeoStudio和FLAC3D兩種軟件計算模式和理論的研究,基于fish參數(shù)化語言,編制了孔壓場轉(zhuǎn)換程序(seep/w to flac3d),此程序采用了鄰域插值和節(jié)點(diǎn)遍歷的運(yùn)行模式,成功實(shí)現(xiàn)了同一邊坡滲流場導(dǎo)入再分析的問題,為本文思路的驗(yàn)證提供了依據(jù)。(4)通過FLAC3D對考慮雙參數(shù)折減和非飽和滲流影響的某滑坡案例的穩(wěn)定性進(jìn)行了計算分析,得到的變形規(guī)律與GeoStudio(slope/w)中采用Morgenstern-Price方法所得結(jié)果相同,并討論了庫水變動速率的不同對岸坡穩(wěn)定性的影響,初步建立了一種分析涉水岸坡穩(wěn)定性的評價方法,初步解決了FLAC3D在非飽和滲流問題上的局限性。
[Abstract]:In this paper, the shortcomings of single unreasonable reduction method of traditional strength reduction method and limitation of FLAC3D software in unsaturated seepage analysis are optimized. A landslide case is calculated and analyzed by using a two-parameter strength reduction method and a self-compiled seep/w to flac3d program, which takes into account the attenuation sequence interval. The seepage field and stability change law of bank slope under the action of reservoir water level are obtained, which can be used for reference for the analysis, evaluation and prevention of the wading slope in the future. At the same time, the development and application of FLAC3D software in unsaturated seepage analysis are further explored. The main achievements of this paper are as follows: (1) based on the theoretical analysis and previous research results, the author deduces the consideration of cu? The analytical formula of two-parameter strength reduction of attenuation sequence interval is more in line with the actual failure mechanism of slope rock and soil and provides a reference for more accurate evaluation of slope stability. The determination of residual strength is always uncertain. The attenuation order interval coefficient a obtained in this paper also provides a theoretical basis for explaining the values of residual cohesion and residual angle of internal friction and evaluating the slope stability with elasticity. (2) in this paper, a landslide case is evaluated by the two-dimensional seepage calculation software GeoStudio. Have carried on the analysis research, The seepage field and stability of bank slope at different seepage time are obtained under the action of reservoir water level rise and fall. The calculation results show that the slope stability safety factor decreases first and then increases at the stage of water level rise, and the most dangerous water level exists when the safety factor is minimum, while at the stage of reservoir water level decreasing, On the other hand, the slope safety factor is gradually decreasing, and the influence of the rise and fall rate of reservoir water level on the slope stability is discussed. The calculation results show that the rising rate of reservoir water level increases or decreases during the period of water level rise. The safety factor of bank slope stability increases and decreases respectively, and during the period of reservoir water level decline, the decreasing rate of reservoir water level increases or decreases. The slope stability safety factor is reduced and increased respectively. (3) through the research of GeoStudio and FLAC3D software calculation mode and theory, based on fish parameterized language, A seep/w to flac3d program is developed, which adopts the operation mode of neighborhood interpolation and node traversal, and successfully realizes the problem of introducing and reanalyzing the seepage field of the same slope. (4) the stability of a landslide case considering the effects of two-parameter reduction and unsaturated seepage is calculated and analyzed by FLAC3D. The results obtained are the same as those obtained by Morgenstern-Price method in GeoStudio (slope/w). The influence of the variation rate of reservoir water on the stability of bank slope is discussed. An evaluation method is established to analyze the stability of bank slope, and the limitation of FLAC3D in unsaturated seepage is solved.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 薛海斌;黨發(fā)寧;尹小濤;楊超;嚴(yán)飛;;邊坡強(qiáng)度參數(shù)非等比例相關(guān)聯(lián)折減法研究[J];巖石力學(xué)與工程學(xué)報;2015年S2期

2 王強(qiáng)志;高永濤;吳順川;張華愷;楊凱;;基于綜合安全系數(shù)的強(qiáng)度折減法的改進(jìn)[J];金屬礦山;2015年07期

3 白冰;袁維;石露;李君;李小春;;一種雙折減法與經(jīng)典強(qiáng)度折減法的關(guān)系[J];巖土力學(xué);2015年05期

4 趙煉恒;曹景源;唐高朋;王志斌;譚捍華;;基于雙強(qiáng)度折減策略的邊坡穩(wěn)定性分析方法探討[J];巖土力學(xué);2014年10期

5 聶柏松;沈振中;邱莉婷;任華春;王瑞;張騰蛟;;雙安全系數(shù)動態(tài)局部強(qiáng)度折減法在邊坡穩(wěn)定分析中的應(yīng)用[J];水電能源科學(xué);2014年04期

6 白冰;袁維;李小春;;A new double reduction method for slope stability analysis[J];Journal of Central South University;2014年03期

7 蔣中明;熊小虎;曾鈴;;基于FLAC~(3D)平臺的邊坡非飽和降雨入滲分析[J];巖土力學(xué);2014年03期

8 陳國慶;黃潤秋;石豫川;許強(qiáng);;基于動態(tài)和整體強(qiáng)度折減法的邊坡穩(wěn)定性分析[J];巖石力學(xué)與工程學(xué)報;2014年02期

9 劉動;陳曉平;;滑帶土殘余強(qiáng)度的室內(nèi)試驗(yàn)與參數(shù)反分析[J];華南理工大學(xué)學(xué)報(自然科學(xué)版);2014年02期

10 袁維;白冰;李小春;汪海濱;;A strength reduction method based on double reduction parameters and its application[J];Journal of Central South University;2013年09期

相關(guān)博士學(xué)位論文 前2條

1 程溫鳴;基于專業(yè)監(jiān)測的三峽庫區(qū)蓄水后滑坡變形機(jī)理與預(yù)警判據(jù)研究[D];中國地質(zhì)大學(xué);2014年

2 梁學(xué)戰(zhàn);三峽庫區(qū)水位升降作用下岸坡破壞機(jī)制研究[D];重慶交通大學(xué);2013年

相關(guān)碩士學(xué)位論文 前4條

1 嚴(yán)志偉;水位升降對路基邊坡穩(wěn)定性影響的理論與試驗(yàn)研究[D];長沙理工大學(xué);2012年

2 陳聰;高山峽谷水庫大型堆積體岸坡失穩(wěn)機(jī)理分析及穩(wěn)定性評價[D];成都理工大學(xué);2011年

3 萬少石;涉水邊坡穩(wěn)定性的三維強(qiáng)度折減有限元分析[D];大連理工大學(xué);2009年

4 王學(xué)武;三峽庫區(qū)水位升降作用對庫岸邊坡影響研究[D];成都理工大學(xué);2005年

，

本文編號：2132809