不同类型支挡结构锚索预应力损失测试

Anchor Cable Prestress Loss Test of Different Types of Retaining Structure

北京戒台寺滑坡治理投资巨大,共采用了预应力锚索墩、梁和锚索桩等,锚索总长34 125m,通过工后近5年观测,工程稳定有效。现场测试各类支挡结构物中的锚索预应力,在锚索墩(梁)中,布置了6孔进行锚索应力监测预应力随时间的变化情况。通过受力监测及分析,了解各类支挡结构物锚索预应力损失的特征及其规律,为预应力锚索设计及其预应力损失研究提供参考实例。(对特征规律进行总结概括)

The Jietai Temple landslide in Beijing is1200m long and450m wide with the volume of slide mass of9000000m3.The control engineering cost is high,34125m-long anchor cable was used.In anchor cable piers(beams),6holes were arranged for anchor cable pre-force monitoring,in order to test the change in the anchor cable pre-force.The sensing devices were embedded into12#,24#anti-slide piles12and24in order to monitor the stress of the anchor cables.The anti-slide engineering can be evaluated according the testing results.