| 多级支护边坡屈服加速度及因素敏感性分析 |
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| 引用本文： | 文畅平.多级支护边坡屈服加速度及因素敏感性分析[J].岩土力学,2013,34(10):2889-2897. |
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| 作者姓名： | 文畅平 |
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| 作者单位： | 中南林业科技大学 土木工程与力学学院，长沙 410004 |
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| 基金项目： | 湖南省重点学科建设项目资助(No.2013ZDXK006)；中南林业科技大学引进高层次人才科研启动基金项目资助(No.104-0094)。 |
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| 摘 要： | 基于拟静力法，结合塑性极限分析上限定理和强度折减技术，推导了桩板式挡墙与二级锚杆挡墙支护高边坡地震作用下的水平屈服加速度系数的上限解，分别计算了多级支护结构总高度、边坡平台宽度、土的抗剪强度折减系数、桩板墙桩侧土压力分布经验系数、锚杆挡墙倾角、锚杆轴力及倾角等因素下，多级支护边坡的水平屈服加速度系数的临界极限值。根据正交分析法，给出了地震条件下基覆边坡水平屈服加速度系数影响因素的敏感性顺序。研究表明，多级支挡结构高度和锚杆轴力敏感性较大，而锚杆倾角、桩侧土压力分布经验系数和边坡平台宽度的敏感性较小。锚杆倾角、锚杆挡墙倾角、边坡平台宽度、桩板墙抗力及桩侧土压力分布形式的选择等，对水平屈服加速度系数的影响较小。土的抗剪强度参数中，黏聚力对水平屈服加速度系数的影响较小，而内摩擦角的影响较大。
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| 关 键 词： | 多级支护边坡 屈服加速度 敏感性分析 上限定理 拟静力法 |
| 收稿时间： | 2013-04-22 |
Study of yield acceleration of slope stabilized by multistage retaining earth structures and sensitivity analysis of influence factors |
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| WEN Chang-ping.Study of yield acceleration of slope stabilized by multistage retaining earth structures and sensitivity analysis of influence factors[J].Rock and Soil Mechanics,2013,34(10):2889-2897. |
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| Authors: | WEN Chang-ping |
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| Institution: | School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China |
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| Abstract: | According to the fundamental theory of upper bound theorem of plastic limit analysis and strength reduction technique based on pseudo-static method, the upper bound solution of the horizontal yield acceleration coefficient of slope stabilized by sheet-pile retaining wall, and two-step anchored bolt retaining wall is deduced rigorously. The critical values of the horizontal yield acceleration of multistage retaining high slopes with different heights of multistage retaining structures, the width of slope plain stages, soil shear strength reduction coefficient, the empirical coefficient of earth pressure along pile, the angle of anchored bolt retaining wall, the pretension force and angle of anchor rod are calculated. The influence factors sensibility sequences of the horizontal yield acceleration coefficient of the bedrock and overburden layer slope under earthquake loading are listed using the orthogonal experiment method. The study indicates that two factors such as the height of multistage retaining structure, and the pretension force of anchor rod are the key factors that influencing the sensitivity of the horizontal yield acceleration coefficient of the multistage retaining slope; but the sensitivities of three factors including the angle of anchor rod, the empirical coefficient of earth pressure along pile, and the width of slope plain stage are relatively small. Moreover, the parameters such as the angle of anchor rod, the angle of anchored bolt retaining wall, the width of slope plain stage, the resistance of sheet-pile retaining wall, the selection of earth pressure distribution type along pile, and cohesion among the shear strength parameters have little effect on the horizontal yield acceleration coefficient; but the internal friction angle has a great influence on it. |
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| Keywords: | multistage retained slope yield acceleration sensibility analysis upper bound theorem pseudo-static method |
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