竖向静荷载作用下桩身应变与变形测试新方法及其应用

The New Method and Its Application Measuring the Axial Strain and Deformation of the Pile Under the Vertical Static Load

详细介绍了分布式光纤传感技术(BOTDA)测量应变原理和传感光缆埋设方法,推导了桩身轴力、桩周摩阻力、桩端阻力与桩身变形的计算公式。竖向静载荷试验应用表明:该测试新方法有效、可行,测试数据准确,测试成果丰富,可应用于基桩质量检测和长期安全监测。

This paper introduces in detail the Distributed Optical Fibre Sensing Technology (BOTDA)strain measurement principle and the embedment method. To deduce the calculation formula of the pileshaft force, the frictional resistance around pile, pile tip resistance and the determining method of pile.The vertical static load test showed that: the new method of the test is effective, feasible, accurate testdata, test results, and can be applied to the pile quality detection and safety monitoring.