亚奥广场护坡桩内力及锚杆拉力测试与分析

Measurement and Analysis on the Stress in Retaining Pile and the Force of Anchor at a Deep Excavation of YA-AO Building

摘要: 针对北京地区深基坑支护结构的实际受力与理论计算结果出入很大的问题,对北京亚奥广场支护结构的监测结果进行了分析.监测结果表明,护坡桩内钢筋的应力一般仅为数十MPa,远远小于设计强度值。而锚杆的实际拉力也仅为原设计值的1/3-1/2,说明实际作用于支护结构上的土压力显著小于设计采用的土压力值.监测结果为类似工程的设计提供了参考.

Abstract: For the problem of huge difference between the actual stress in retaining structures of deep foundation pit and theoretical calculation, this article analyzed those data measured from YA-AO Square in Beijing. The results show that the stress in retaining piles is no less than 100 MPa, which is far less than designed strength, and the pulling force of anchors is 1/3 - 1/2 of designed value, which provide valuable references for similar projects.