某长江大桥高峰岸锚碇基础边坡稳定性研究  

Stability Analysis for Anchored Foundation Slope of Higher Bank Side of One Yangtze River Bridge

作　　者：叶智英 王朦 梅松华 林孟源 肖拥军[2] YE Zhi-ying;WANG Meng;MEI Song-hua;LIN Meng-yuan;XIAO Yong-jun(Zhejiang Changzheng Vocational&Technical College,Hangzhou 310023,Zhejiang,China;Hunan University of Science and Technology,Xiangtan 411201,Hunan,China;Powerchina Zhongnan Engineering Corporaion Limited,Changsha 410014,Hunan,China)

机构地区：[1]浙江长征职业技术学院,浙江杭州310023 [2]湖南科技大学,湖南湘潭411201 [3]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《矿冶工程》2021年第3期11-15,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52078211);湖南省自然科学基金(2020JJ4298);湖南省教育厅科学研究项目(18A189)。

摘　　要：基于有限元强度折减法建立某长江大桥高峰岸锚碇基础边坡三维模型,模拟分析了锚碇基础施工及运营过程中边坡变形特征及稳定性。分析结果表明,采用改进的GSI(地质强度指标)法确定岩体力学参数,更符合工程实际;三维整体强度折减法计算的安全系数明显高于极限平衡分析结果;三维分析方法可直观显示边坡的破坏形式和位置,便于定性判断边坡破坏性质。根据分析结果,提出了相应工程措施,以确保锚碇基础边坡在施工及运行期安全。Based on the finite element strength reduction method,a three-dimensional model was established for the anchored foundation slope on the higher bank side of one Yangtze River Bridge.And the deformation characteristics and stability of the slope during the construction and operation of anchored foundation were simulated and analyzed.The analysis results show that it is more practical for the improved GSI(geological strength index)method to be adopted in the engineering project to determine the mechanical parameters of rock mass.The safety factor calculated by using three-dimensional reduction for overall strength is obviously higher than that from limit-equilibrium analysis.The failure form and failure position of the slope can be visually displayed with three-dimensional analysis method,which can be taken to qualitatively judge the failure properties of the slope.Based on the analysis results,the corresponding engineering measures were put forward for ensuring the safety of anchored foundation slope during the construction and operation.

关 键 词：桥梁工程 锚碇 基坑 边坡 稳定性 有限元分析 GSI法 

分 类 号：TU432[建筑科学—岩土工程]