摘要
针对超深基坑工程内支撑拆除过程中基坑变形的问题。以深圳福田区1号地工程为研究背景,介绍了超深基坑监测方案,对支护桩体深层水平位移,周围地表沉降,立柱沉降及支撑轴力等项目进行了现场监测,分析了内支撑拆除过程对支护桩体深层水平位移,周围地表沉降及支撑轴力的影响。分析结果表明:基坑周围的地表沉降随着支撑的不断拆除表现出明显的时间性和空间性;支护桩体深层水平位移近似于最大值点随拆撑过程不断上移的抛物线型分布;支撑分担的土压力随拆撑过程也在发生不断变化,并且横向支撑分担的土压力呈不断增大的趋势。由监测结果可知,该工程拆除方案合理,效果较好,满足设计和环境的要求。
The deformation monitoring and analysis in the process of dismantling inner support is cru- cial. In this paper, a super deep foundation pit engineering was taken as the research background, the rule of a deep horizontal displacement of the supporting structure, ground settlement, vertical set- tlement and axial force of support in the demolition process of support were monitored and analyzed. It was obtained that the settlement of surface ground around the foundation shows spatial and temporal clearly and the distribution of deep horizontal displacement of supporting structure is similar to the parabolic whose the maximum point constant upward shift with supporting continuous removed. Soil pressure of supporting shared with support removing process changed obviously, and the earth pres- sures of lateral support sharing show increasing trend. From the monitoring results, the demolition scheme is reasonable and effective and meets with the requirements of design and environment.
出处
《河北工程大学学报（自然科学版）》
CAS
2014年第3期17-21,共5页
Journal of Hebei University of Engineering:Natural Science Edition
