公路高边坡稳定性分析与抗滑桩优化设计
发布时间：2019-06-06 10:26
【摘要】：近年来,现代化城镇建设日新月异,偏远地区正在大量建造高速公路。这些地区工程地质条件恶劣,为满足设计需求,产生了许多高填路堤和深挖路堑,其形成的高边坡稳定性问题日益严重。本文以杭新景高速公路七里连接线12#高边坡治理项目为依托,基于极限平衡原理,采用多种方法对高边坡稳定性进行了模拟分析;并对高边坡抗滑桩加固方案开展了优化设计。主要研究成果如下:(1)根据12#高边坡的工程地质条件,基于Rocsicence Slide软件,建立了边坡二维计算模型,采用极限平衡法,计算了天然、暴雨、地震工况下边坡的稳定系数,对边坡稳定性进行了分析。(2)基于Rocsicence Slide软件,采用可靠度分析法,研究了边坡稳定性对各因素(岩土体参数、地震系数、地下水位)的敏感性。对边坡稳定性开展了概率分析,利用破坏概率评价了边坡的稳定性。(3)采用ABAQUS建立了边坡三维计算模型。利用其流体/位移单元,将边坡渗流场和应力场直接耦合,结合强度折减法模拟分析了天然、暴雨工况下边坡的稳定性。揭示了边坡的渗流场、塑性变形区、边坡各点水平、竖向位移等,判断了边坡失稳时的滑动面位置和形状,评价了边坡的稳定性,为边坡治理提供依据。(4)高边坡抗滑桩加固方案优化。基于ABAQUS模拟分析了抗滑桩不同设计参数(桩位、桩长、桩间距、桩横截面)下边坡的塑性区、位移、稳定系数及抗滑桩的位移的变化规律,提出了抗滑桩的最优加固方案。
[Abstract]:In recent years, the construction of modern cities and towns is changing with each passing day, and a large number of highways are being built in remote areas. The engineering geological conditions in these areas are bad. In order to meet the design needs, many high fill embankment and deep cutting have been produced, and the stability of high slope is becoming more and more serious. In this paper, based on the 12# high slope treatment project of Qili connection line of Hangzhou Xinjing Expressway, based on the principle of limit equilibrium, the stability of high slope is simulated and analyzed by various methods. The reinforcement scheme of high slope anti-slide pile is optimized. The main research results are as follows: (1) according to the engineering geological conditions of 12# high slope, based on Rocsicence Slide software, the two-dimensional calculation model of slope is established, and the stability coefficient of slope under natural, rainstorm and seismic conditions is calculated by using limit equilibrium method. The stability of slope is analyzed. (2) based on Rocsicence Slide software and reliability analysis method, the sensitivity of slope stability to various factors (rock and soil parameters, seismic coefficient, groundwater level) is studied. The probability analysis of slope stability is carried out, and the stability of slope is evaluated by failure probability. (3) the three-dimensional calculation model of slope is established by ABAQUS. By using the fluid / displacement element, the seepage field and stress field of the slope are directly coupled, and the stability of the slope under natural and rainstorm conditions is simulated and analyzed with the strength reduction method. The seepage field, plastic deformation zone, horizontal and vertical displacement of the slope are revealed, the position and shape of the sliding surface when the slope is unstable are judged, and the stability of the slope is evaluated. It provides the basis for slope treatment. (4) Optimization of anti-slide pile reinforcement scheme for high slope. Based on ABAQUS simulation, the plastic zone, displacement, stability coefficient and displacement of anti-slide pile under different design parameters (pile position, pile length, pile spacing, pile cross section) are analyzed, and the optimal reinforcement scheme of anti-slide pile is put forward.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.14
，
本文编号：2494287
[Abstract]:In recent years, the construction of modern cities and towns is changing with each passing day, and a large number of highways are being built in remote areas. The engineering geological conditions in these areas are bad. In order to meet the design needs, many high fill embankment and deep cutting have been produced, and the stability of high slope is becoming more and more serious. In this paper, based on the 12# high slope treatment project of Qili connection line of Hangzhou Xinjing Expressway, based on the principle of limit equilibrium, the stability of high slope is simulated and analyzed by various methods. The reinforcement scheme of high slope anti-slide pile is optimized. The main research results are as follows: (1) according to the engineering geological conditions of 12# high slope, based on Rocsicence Slide software, the two-dimensional calculation model of slope is established, and the stability coefficient of slope under natural, rainstorm and seismic conditions is calculated by using limit equilibrium method. The stability of slope is analyzed. (2) based on Rocsicence Slide software and reliability analysis method, the sensitivity of slope stability to various factors (rock and soil parameters, seismic coefficient, groundwater level) is studied. The probability analysis of slope stability is carried out, and the stability of slope is evaluated by failure probability. (3) the three-dimensional calculation model of slope is established by ABAQUS. By using the fluid / displacement element, the seepage field and stress field of the slope are directly coupled, and the stability of the slope under natural and rainstorm conditions is simulated and analyzed with the strength reduction method. The seepage field, plastic deformation zone, horizontal and vertical displacement of the slope are revealed, the position and shape of the sliding surface when the slope is unstable are judged, and the stability of the slope is evaluated. It provides the basis for slope treatment. (4) Optimization of anti-slide pile reinforcement scheme for high slope. Based on ABAQUS simulation, the plastic zone, displacement, stability coefficient and displacement of anti-slide pile under different design parameters (pile position, pile length, pile spacing, pile cross section) are analyzed, and the optimal reinforcement scheme of anti-slide pile is put forward.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.14
，
本文编号：2494287
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