摘要
基坑工程中,桩后土体的变形是对支护结构产生作用力的原因,对桩后土体的实时监测,能够准确把握土体的变形规律,确保施工安全。依据某桩锚联合支护式深基坑桩后土体深部水平位移的实测资料,进行研究分析,得到土体深部水平位移分布图。研究表明:基坑开挖过程中,土体深部水平位移不断增加,沿深度方向呈现"中间大,上下小"的分布规律,最大值在测斜深度的上1/3处;开挖深度对土体深部水平位移最大值位置点影响显著;最大值位置处的位移呈现"阶梯状"增长规律。研究分析结果为支护桩受力及变形、桩后土压力的分析提供依据,对进一步施工提供指导。
In foundation pit engineering, the deformation of pile-soil is the most important reason for producing force on the supporting structure. The real-time monitoring of pile-soil can help accurately grasp the deformation law of soil and ensure construction safety. The measured data of deep horizontal displacement of soil in anchor-pile bracing structure for deep foun- dation pit is researched and analyzed, and the distribution diagram about deep displacement of soil is received. As a result, it is shown that the deep displacement of pile-soil increases constantly in the process of excavation, with the increase of exca- vation deep, the distribution law is that the value of middle is larger than others along the depth direction and the maximum displacement stabilize at 1/3 along the depth of lateral deformation. In addition, the depth of excavation has a significant effect on the maximum point of soil＇s deep displacement, and the displacement at the position of maximum value presents ＂stepladder＂ growth rule. The analysis results can provide guidance for the analysis of stress and deformation of support pile and the stress of pile-soil, it also provide guidance for next step in the foundation pit construction.
出处
《四川理工学院学报（自然科学版）》
CAS
2015年第2期57-62,共6页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
深基坑
深部水平位移
开挖深度
最大位移位置
deep foundation pit
deep horizontal displacement
excavation depth
the position of maximum displace-
