有限元强度折减法在加筋格宾陡坡支挡结构中的应用

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摘要依托我国第一座高速公路加筋格宾陡坡支挡结构——湖北大广北高速公路兰溪互通AK0+939.68～AK1+079.71，BK0+296.55～366.18陡坡加筋土工程，以岩土工程专业有限元程序Phase2 V6.0为研究平台，采用有限元强度折减法对该加筋格宾陡坡的稳定性进行评价。以经典极限平衡条分法的计算结果为基础，分析单元选型对计算结果的影响，提出采用有限元强度折减法计算筋材拉力分布，从而确定加筋土结构内部破裂面的方法，探讨填料黏聚力c、内摩擦角、网面拉力、地震力、填土重度、车辆荷载以及加筋间距等重要参数对安全系数的影响。相关成果可指导具体工程设计。

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	黄向京1
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	许桂林1
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	陈润夏4

关键词 ：边坡工程, 有限元, 强度折减法, 加筋格宾, 陡坡, 稳定分析, 内部破裂面

Abstract：According to the first expressway reinforced gabion retaining structure in China(reinforced earth engineering of Daqing—Guangzhou expressway section of Lanxi interchange AK0+939.38–AK1+079.71，BK0+296.55–366.18 in Hubei Province)，the stability of steep reinforced gabion slope is evaluated by using strength reduction finite element method(FEM) on the platform of the finite element software Phase2 V6.0. Based on the results of limit equilibrium slice method，the effect of selected element on the results of strength reduction method is analyzed. A new method to determine the internal failure surface of reinforced earth structure by using FEM to calculate tension distribution of reinforcements is proposed. The influences of cohesion，internal friction angle，tension，earthquake force，gravity density and vehicle load on factor of safety are discussed. Thus，it can be effectively used to guide the specific engineering designs.

Key words： slop engineering finite elements strength reduction method reinforced gabion retaining wall steep slope stability analysis internal failure surface

引用本文:

黄向京1，2，许桂林1，3，陈润夏4. 有限元强度折减法在加筋格宾陡坡支挡结构中的应用[J]. 岩石力学与工程学报, 2010, 29(S2): 3916-3922.
HUANG Xiangjing1，2，XU Guilin1，3，CHEN Runxia4. APPLICATION OF STRENGTH REDUCTION FEM TO REINFORCED GABION RETAINING STRUCTURE IN STEEP SLOPE. , 2010, 29(S2): 3916-3922.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/3916

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