桩锚支护中锚杆张拉顺序对预应力影响的试验研究

Tensioning Squence of Bolt to Prestress in Pile-Anchor Support

以北京某深基坑支护工程为背景,结合现场桩锚支护体系预应力锚杆的实测数据,综合分析不同张拉顺序下锚杆预应力损失率变化规律。认为相同条件下依次张拉锁定的顺序,锚杆预应力值损失率最小。

Based on the deep foundation pit support project in Beijing, combined with measured data of prestressed bolt in pile - anchor support system, this paper comprehensively analyzed the regular pattern with time by the different tensioning sequence of bolt. Under the same conditions , it is considered that the prestress loss rate of the anchor is the smallest in the adjacent tensioning sequence.