Analysis of Impact of Free Segment of Bolt to Prestress of Bolt in Pile-Anchor Support
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摘要: 以北京某医院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,综合分析不同自由段下锚杆预应力值随时间变化规律。认为相同条件下自由段越长,锚杆预应力值损失率越小。Abstract: Based on the deep foundation pit support project of a hospital in Beijing,this paper combined with measured data of prestressed bolt in pile-anchor support system,comprehensively analyzed the regular pattern with time by the different free segment of bolt.Under the same conditions,it is considered that the longer the free segment,the smaller the loss rate of the anchor prestress value.
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Key words:
- prestress loss /
- anchor /
- free segment
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