發(fā)布時間：2018-11-04 13:30

【摘要】：開挖和降雨是在工程建設中對邊坡穩(wěn)定影響較大的因素,其作用機理十分復雜,與工程地質(zhì)條件、施工過程等多種因素有關。本文以舟山市馬跡山碼頭D16邊坡工點作為研究對象,利用工程地質(zhì)勘查和物理力學實驗等結(jié)果以及類似工程條件下的水-土特征曲線建立了降雨入滲模型。首先,利用Geo-slope軟件分析了不同降雨條件下的孔隙水壓力、位移、應變等分布特征,分析降雨對邊坡穩(wěn)定影響研究;其次,對開挖過程進行了模擬,研究了開挖對邊坡的影響;最后,模擬了在降雨條件下開挖對降雨下邊坡的變形以及穩(wěn)定性的影響。主要工作如下:(1)利用Geo-slope軟件分析0.005m/hr、0.01m/hr、0.02m/hr、0.025m/hr的降雨條件下持續(xù)48小時工況下的邊坡內(nèi)孔隙水壓力、位移、應變等分布特征,分析降雨對邊坡穩(wěn)定影響研究。研究表明開挖前邊坡在強降雨條件下會發(fā)生滑動,對邊坡穩(wěn)定不利。(2)建立了概化的馬跡山巖質(zhì)邊坡工程地質(zhì)剖面,利用軟件分析了開挖對邊坡的影響,主要根據(jù)位移、剪應力、剪應變、穩(wěn)定性系數(shù)等因素分析了開挖對坡體的影響;同時,運用概率密度分析方法計算了開挖過程中邊坡失效概率與可靠性系數(shù)。分析表明該開挖工程對邊坡影響很小。(3)以降雨強度0.025m/hr持續(xù)48小時為計算工況,分析了開挖后邊坡穩(wěn)定性變化、孔隙水壓力、含水量、位移、應變等特征,分析表明:降雨對開挖前邊坡穩(wěn)定性影響,且易于引起滑坡;而降雨對開挖后的邊坡穩(wěn)定性影響很小。
[Abstract]:Excavation and rainfall are the factors that have great influence on slope stability in engineering construction. The mechanism of excavation and rainfall is very complex, which is related to engineering geological conditions, construction process and other factors. In this paper, the D16 slope site of Majishan Wharf in Zhoushan City is taken as the research object, and the rainfall infiltration model is established by using the results of engineering geological survey and physical and mechanical experiments, as well as the characteristic curves of water-soil under similar engineering conditions. Firstly, the distribution characteristics of pore water pressure, displacement and strain under different rainfall conditions are analyzed by Geo-slope software, and the influence of rainfall on slope stability is analyzed. Secondly, the excavation process is simulated and the influence of excavation on slope is studied. Finally, the influence of excavation on slope deformation and stability under rainfall is simulated. The main work is as follows: (1) the distribution characteristics of pore water pressure, displacement, strain and so on in the slope under the condition of rainfall of 0.005 m / h, 0.01m / h, 0.02m / h, 0.025m / hr, lasting for 48 hours, are analyzed by using Geo-slope software. The influence of rainfall on slope stability is analyzed. The research shows that the slope will slide under the condition of heavy rainfall before excavation, which is unfavorable to the stability of the slope. (2) the engineering geological profile of the Matrace rock slope is established, and the influence of the excavation on the slope is analyzed by software, mainly according to the displacement. Factors such as shear stress, shear strain and stability coefficient are analyzed to analyze the influence of excavation on slope body. At the same time, the probability density analysis method is used to calculate the slope failure probability and reliability coefficient. The analysis shows that the excavation works have little influence on the slope. (3) the slope stability change, pore water pressure, water content, displacement, strain and so on after excavation are analyzed with rainfall intensity 0.025m/hr for 48 hours. The analysis shows that rainfall affects the stability of slope before excavation, and it is easy to cause landslide. Rainfall has little effect on slope stability after excavation.
【學位授予單位】：浙江海洋大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U656.1

【參考文獻】

相關期刊論文 前10條

1 王玉峰;程謙恭;黃英儒;;不同支護模式下黃土高邊坡開挖變形離心模型試驗研究[J];巖石力學與工程學報;2014年05期

2 李龍起;羅書學;魏文凱;王運超;徐華;徐駿;;降雨入滲對含軟弱夾層順層巖質(zhì)邊坡性狀影響的模型試驗研究[J];巖石力學與工程學報;2013年09期

3 胡英國;盧文波;陳明;嚴鵬;周創(chuàng)兵;;不同開挖方式下巖石高邊坡?lián)p傷演化過程比較[J];巖石力學與工程學報;2013年06期

4 孔亮;孫文杰;鄭穎人;;基于安全系數(shù)的地鐵區(qū)間隧道合理埋深確定[J];寧夏大學學報(自然科學版);2012年04期

5 鄧通發(fā);桂勇;羅嗣海;周軍平;;降雨條件下花崗巖殘坡積土路塹邊坡穩(wěn)定性研究[J];地球科學與環(huán)境學報;2012年04期

6 代汝林;李忠芳;王姣;;基于ABAQUS的初始地應力平衡方法研究[J];重慶工商大學學報(自然科學版);2012年09期

7 孫文杰;孔亮;鄭穎人;任曉云;;基于安全系數(shù)的地鐵車站襯砌優(yōu)化設計探討[J];地下空間與工程學報;2012年01期

8 肖超;金福喜;劉海鴻;張可能;;開挖與降雨作用下邊坡失穩(wěn)機理及模擬分析[J];工程地質(zhì)學報;2012年01期

9 趙洪寶;潘衛(wèi)東;;開挖對巖質(zhì)邊坡穩(wěn)定性影響的數(shù)值模擬[J];金屬礦山;2011年07期

10 李明;張嘎;李焯芬;張建民;;開挖對邊坡變形影響的離心模型試驗研究[J];巖土工程學報;2011年04期

相關博士學位論文 前1條

1 宋從軍;路塹高邊坡開挖變形理論及控制措施研究[D];西南交通大學;2004年

相關碩士學位論文 前2條

1 胡斌;新型聚合物處理軟巖邊坡綜合應用技術(shù)研究[D];長沙理工大學;2014年

2 魏文凱;降雨入滲作用下順層巖質(zhì)邊坡穩(wěn)定性研究[D];西南交通大學;2013年

，

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