管桩加固拓宽路堤地基的离心试验研究  

Study on centrifugal modeling tests for the composite foundation of the widening embankment with pipe piles

作　　者：郭永建[1] 尚新鸿[1,2] 谢永利[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]河北交通职业技术学院,石家庄050091

出　　处：《工程勘察》2010年第2期7-9,92,共4页Geotechnical Investigation & Surveying

摘　　要：针对在软弱地基上进行路堤的拓宽工程中出现不均匀沉降的问题,通过室内物理力学试验确定出地基土和填土的含水量、密度等参数,利用离心模型试验进行不同工况分析。试验结果表明在路堤的拓宽工程中采用管桩加固地基的方法,能够提高地基的承载能力,大大减小不均匀沉降量,增强边坡的稳定性,为实际施工提供了理论支持和试验验证。Based on the differential settlement in the construction of the embankment widening of the highway in soft clay foundation,the parameters such as water content and density of the foundation soil and the filling are determined by the indoor physical and mechanical tests.The centrifugal modeling tests are used to simulate the different working conditions.The test results show that the pipe piles used to treat the soft clay foundation have got the satisfied results,which could improve the bearing capacity, greatly reduce the differential settlement, and improve the stability of the slope. It provides the theoretic basis and the testing examination for the construction.

关 键 词：离心模型试验 路堤拓宽 管桩 不均匀沉降 

分 类 号：U416.1[交通运输工程—道路与铁道工程]