高速公路改扩建工程高边坡开挖过程稳定性研究
发布时间：2018-10-24 17:04
【摘要】：高速公路改扩建过程中势必要拆除边坡原有支护,造成边坡应力重分布,因此在开挖过程中边坡的稳定性处于动态发展过程中,开挖支护时序、施工期内的降雨量等对其均有较大影响。若处理不当,边坡极有可能失稳破坏。因此,研究开挖过程中的边坡变形规律及其稳定性,寻求合理的开挖支护方法及边坡加固措施,对于确保改扩建边坡工程的安全稳定有着重要意义。论文以柳南高速K1456+800~K1468+300段改扩建工程某典型边坡为依托,以边坡开挖变形规律为目标,以边坡稳定性控制方案为主线,借助离心模型试验、有限元模拟计算和理论分析等手段,开展了高速公路高边坡改扩建开挖过程稳定性研究。论文首先系统分析了影响高速公路高边坡稳定性的影响因素,结合柳南改扩建路段的实际工况,进行了高边坡开挖稳定性影响因素的灵敏度分析,然后采用响应面法和蒙特卡罗两种方法对岩性参数内聚力c和内摩擦角进行了可靠度分析。借助长安大学60gt离心模型试验系统,构建与实际应力相符的边坡模型,依靠激光位移传感器、非接触式位移监测系统等明确了边坡开挖过程中的变形过程,揭示了不同开挖支护时序下边坡的稳定状态的动态发展规律;以土工土工离心机系统为平台研发了降雨装置,在离心场中实现了对降雨过程的模拟,研究了开挖过程中的降雨对边坡稳定状态的影响,以及不同降雨量后边坡稳定状态的发展过程。以柳南高速典型边坡为原型,进行不同施工方法的有限元数值模拟,分析了不同开挖支护时序对边坡安全系数、应力、位移等的影响。同时根据改扩建道路拓宽的宽度,确定边坡开挖后的坡脚点,并以此为基准点,利用ADINA有限元计算软件,分别建立边坡开挖比例为1:0.75、1:1及1:1.25的数值计算模型,分析不同开挖深度、不同开挖分级数对边坡安全系数、应力、位移等变量的影响。最后总结控制边坡开挖变形的常用施工处治技术方法,分析了各方法对应的设计计算方法,提出了适合改扩建边坡的合理施工方案,将信息施工技术有效的应用于改扩建边坡稳定性控制措施方案中;确定了合理的施工原则,保证了边坡施工整体性的安全稳定,对后期稳定的安全起到重要的作用。
[Abstract]:In the process of highway reconstruction and extension, the original slope support must be removed, which results in the stress redistribution of the slope, so the stability of the slope is in the dynamic development process during the excavation process. Rainfall during construction has great influence on it. If the treatment is not proper, the slope is most likely to lose stability and damage. Therefore, it is of great significance to study the law of slope deformation and its stability during excavation, and to seek reasonable excavation and support methods and slope reinforcement measures to ensure the safety and stability of slope reconstruction and extension projects. Based on a typical slope of Liunan high-speed K1456 800~K1468 300 section, taking the excavation deformation law as the target and the slope stability control scheme as the main line, the paper makes use of centrifugal model test, finite element simulation calculation and theoretical analysis and so on. The stability of highway high slope reconstruction and excavation process is studied. Firstly, the influence factors of high slope stability of expressway are systematically analyzed, and the sensitivity analysis of the influencing factors of excavation stability of high slope is carried out according to the actual working conditions of the extended section of Liunan. Then the reliability of cohesive force c and internal friction angle of lithologic parameters is analyzed by using response surface method and Monte Carlo method. With the aid of the 60gt centrifugal model test system of Changan University, the slope model which is consistent with the actual stress is constructed. The deformation process of the slope during excavation is determined by the laser displacement sensor and the non-contact displacement monitoring system. The dynamic development law of slope stability under different excavation timings is revealed, the rainfall device is developed on the platform of geotechnical centrifuge system, and the rainfall process is simulated in centrifugal field. The influence of rainfall during excavation on slope stability and the development of slope stability after different rainfall are studied. Taking the typical slope of Liunan high speed as the prototype, the finite element numerical simulation of different construction methods is carried out, and the influence of different excavation timings on the safety factor, stress and displacement of the slope is analyzed. At the same time, according to the width of the widening of the reconstruction and extension road, the slope base point after excavation is determined, and by using ADINA finite element calculation software, the numerical calculation models of the slope excavation ratio of 1: 0.75-1: 1 / 1 and 1: 1.25 are established respectively, and the different excavation depth is analyzed. The influence of different excavation classification number on slope safety factor, stress, displacement and so on. At last, it summarizes the common construction treatment methods to control the slope excavation deformation, analyzes the corresponding design and calculation methods of each method, and puts forward a reasonable construction scheme suitable for the reconstruction and expansion of the slope. The information construction technology is effectively applied to the slope stability control scheme of reconstruction and extension, and the reasonable construction principle is determined to ensure the safety and stability of the slope construction as a whole, which plays an important role in the stability of the slope in the later stage.
【学位授予单位】：长安大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：U416.14
本文编号：2292002
[Abstract]:In the process of highway reconstruction and extension, the original slope support must be removed, which results in the stress redistribution of the slope, so the stability of the slope is in the dynamic development process during the excavation process. Rainfall during construction has great influence on it. If the treatment is not proper, the slope is most likely to lose stability and damage. Therefore, it is of great significance to study the law of slope deformation and its stability during excavation, and to seek reasonable excavation and support methods and slope reinforcement measures to ensure the safety and stability of slope reconstruction and extension projects. Based on a typical slope of Liunan high-speed K1456 800~K1468 300 section, taking the excavation deformation law as the target and the slope stability control scheme as the main line, the paper makes use of centrifugal model test, finite element simulation calculation and theoretical analysis and so on. The stability of highway high slope reconstruction and excavation process is studied. Firstly, the influence factors of high slope stability of expressway are systematically analyzed, and the sensitivity analysis of the influencing factors of excavation stability of high slope is carried out according to the actual working conditions of the extended section of Liunan. Then the reliability of cohesive force c and internal friction angle of lithologic parameters is analyzed by using response surface method and Monte Carlo method. With the aid of the 60gt centrifugal model test system of Changan University, the slope model which is consistent with the actual stress is constructed. The deformation process of the slope during excavation is determined by the laser displacement sensor and the non-contact displacement monitoring system. The dynamic development law of slope stability under different excavation timings is revealed, the rainfall device is developed on the platform of geotechnical centrifuge system, and the rainfall process is simulated in centrifugal field. The influence of rainfall during excavation on slope stability and the development of slope stability after different rainfall are studied. Taking the typical slope of Liunan high speed as the prototype, the finite element numerical simulation of different construction methods is carried out, and the influence of different excavation timings on the safety factor, stress and displacement of the slope is analyzed. At the same time, according to the width of the widening of the reconstruction and extension road, the slope base point after excavation is determined, and by using ADINA finite element calculation software, the numerical calculation models of the slope excavation ratio of 1: 0.75-1: 1 / 1 and 1: 1.25 are established respectively, and the different excavation depth is analyzed. The influence of different excavation classification number on slope safety factor, stress, displacement and so on. At last, it summarizes the common construction treatment methods to control the slope excavation deformation, analyzes the corresponding design and calculation methods of each method, and puts forward a reasonable construction scheme suitable for the reconstruction and expansion of the slope. The information construction technology is effectively applied to the slope stability control scheme of reconstruction and extension, and the reasonable construction principle is determined to ensure the safety and stability of the slope construction as a whole, which plays an important role in the stability of the slope in the later stage.
【学位授予单位】：长安大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：U416.14
【参考文献】
相关期刊论文 前10条
1 包承纲,饶锡保;土工离心模型的试验原理[J];长江科学院院报;1998年02期
2 陈建平,唐辉明,刘佑荣,胡新丽,王亮清,张志波;京珠高速公路大悟段高边坡加固设计方法探讨[J];地质与勘探;2000年02期
3 谢雯;廖来兴;周波;金福喜;;既有道路改扩建边坡开挖支护措施与经济分析[J];广东建材;2011年10期
4 张洪全;;考虑降水渗流对边坡稳定性影响分析[J];工程与建设;2009年06期
5 张丰焰;周伟;王元庆;张佳;;高速公路改扩建工程交通组织设计探讨[J];公路;2006年01期
6 马晓力;柳银芳;林宣财;李红;;改建工程施工期交通组织设计探讨[J];公路;2008年07期
7 赵军;孙昌;;广义随机空间内可靠性分析的改进一次二阶矩法[J];桂林理工大学学报;2011年01期
8 韩熠;李杰;;高速公路改扩建工程施工交通组织研究[J];公路交通科技(应用技术版);2007年08期
9 岳军委;;洛三高速公路改扩建工程交通组织方案研究[J];中外公路;2010年06期
10 洪祖正;;新时期高速公路边坡加固与防护技术[J];城市地理;2014年14期
相关博士学位论文 前2条
1 朱建军;层次分析法的若干问题研究及应用[D];东北大学;2005年
2 姚裕春;边坡开挖工程活动对环境影响研究[D];西南交通大学;2005年
相关硕士学位论文 前6条
1 何朋朋;基于蒙特卡罗方法的边坡可靠性分析[D];中国地质大学（北京）;2006年
2 李清泰;化临高速公路边坡加固方案研究及稳定性分析[D];上海交通大学;2006年
3 刘永涛;降雨入渗对黄土边坡稳定性影响研究[D];西北农林科技大学;2010年
4 莫进丰;开挖边坡变形稳定性分析与稳定性控制研究[D];中南大学;2010年
5 杨显峰;结构可靠度分析的高效响应面法研究[D];广西大学;2012年
6 袁彦华;结构可靠度分析的向量型层递响应面法及其最优概率配点研究[D];广西大学;2013年
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