桩基托梁挡土墙在某填方路基中的应用分析  

Application Analysis of Pile Foundation-TrimmerBeam-Retaining in a Filled Subgrade

作　　者：张力 ZHANG Li(Shanxi Transportation Environmental Protection Center(Co.,Ltd.),Taiyuan,Shanxi 030032,China)

机构地区：[1]山西省交通环境保护中心站(有限公司),山西太原030032

出　　处：《山西交通科技》2023年第5期59-62,共4页Shanxi Science & Technology of Transportation

摘　　要：利用有限元软件模拟分析了桩基托梁挡土墙在填方公路中的支挡效果。分析结果表明:路基土塑性区主要分布在坡级平台至墙背的路基填土范围内,形成了沿下墙背反延线的塑性应变带;基于强度折减法得到了极限平衡状态下路基边坡主要为圆弧滑动破坏,坡顶处的水平位移最大,运营过程中应加强坡顶和坡脚处的位移监测;强风化和中风化岩层处的桩身截面为设计控制断面,桩基的最大应力和最小应力都呈现出先增大后减小的变化趋势。This paper used finite element software to simulate and analyze the retaining effects of the pile foundation⁃trimmer beam⁃retaining on the filled highway.The analysis showed that the plastic zone of the subgrade soil was mainly distributed within the subgrade filling range from the slope platform to the wall back,forming a plastic strain band along the lower wall back reverse extension line.Based on the strength reduction method,it was obtained that the subgrade slope was mainly the circular sliding failure under the limit equilibrium state,and the horizontal displacement at the slope top was maximum,therefore the displacement monitoring at the slope top and foot should be emphasized during the operation process.The pile body sections at the strong⁃weathered and moderately⁃weathered rock stratum were design control sections,and the maximum and minimum stress of the pile foundation tended to be increased first and then decreased.

关 键 词：桩基托梁挡土墙 填方路基 塑性区 稳定性系数 应力 

分 类 号：U417.11[交通运输工程—道路与铁道工程]