坡顶建筑桩长对岩坡稳定性影响的数值分析  

Numerical analysis of pile length effect on rock slope stability of building on top of slope

作　　者：黄嘉 于德顺 卢黎[2,3] 杨卓兴 王连花 胡岱文 

机构地区：[1]重庆绿城两江建筑设计有限公司,重庆401123 [2]重庆大学土木工程学院,重庆400045 [3]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400030 [4]青岛绿城建筑设计有限公司,青岛266071 [5]重庆房地产职业学院,重庆404100

出　　处：《建筑结构》2017年第19期53-58,共6页Building Structure

基　　金：中央高校基本业务费项目(106112014CDJZR200010)

摘　　要：依托岩质边坡坡顶建筑工程实例,利用FLAC3D软件建立数值计算模型,分析了桩端进入潜在破裂面以下和位于潜在破裂面以上两种情况下,建筑岩质边坡沿潜在破裂面滑移的安全系数。通过强度折减法改变潜在破裂面的内摩擦角和黏聚力的取值,模拟计算在强度参数不同取值情况下,建筑岩质边坡的安全系数。结果表明:桩端进入潜在破裂面以下时,建筑岩质边坡的安全系数比桩端位于潜在破裂面以上时提高4倍以上。对本工程而言,桩端进入潜在破裂面以下和桩端位于潜在破裂面以上两种情况都可以满足规范对边坡安全系数要求,本工程设计具有较大的安全度。Based on the practical engineering example of building on the top of rock slope,numerical calculation model was established through FLAC3 Dto analyze the safety factor of the construction rock slope sliding along the potential rupture surface under the two conditions of the pile end entering below the potential failure surface and above the potential failure surface. By means of strength reduction method,the internal friction angle and cohesion value of potential failure surface were changed,and the safety factor of building rock slope was simulated and calculated under different values of strength parameters. The results show that the safety factor of the rock slope,when pile end enters below the potential failure surface,is more than 4 times higher than that under the condition that pile end enters above the potential failure surface.For this project,both the two conditions can meet the code requirements of the safety factor of the slope,and the design of this project has great safety margin.

关 键 词：建筑岩质边坡 桩基础 潜在破裂面 数值分析 

分 类 号：TU473.1[建筑科学—结构工程]