To investigate the load transfer mechanism of open and closed Pre-stressed High-strength Concrete (PHC) piles jacked into layered soil, a full-scale in-situ test was conducted. In this test, the axial stress experienced by one open and two closed PHC pipe piles during jacking into layered soil was monitored using Fiber Bragg Grating (FBG) sensors mounted on pile shaft. The test results showed that (1) The jacking force on pile depended on the soil mechanical properties at the end of pile; (2) The variation of axial force on pile reflected that the compaction effect of soil for closed pile was larger than that for open pile; (3) At the beginning of penetration depth, the variation of shaft and end resistances on the open pile were different from those on the closed piles; (4) The variation of average shaft resistance relied on the mechanical properties of soil at the side of pile.

为了研究顶入分层土壤中的开式和闭式预应力高强度混凝土 (PHC) 桩的荷载传递机制，进行了全尺寸原位试验。在该测试中，使用安装在桩轴上的光纤布拉格光栅 (FBG) 传感器监测一个开放式和两个封闭式 PHC 管桩在顶入分层土壤过程中所承受的轴向应力。试验结果表明：（1）桩顶顶力取决于桩端土体力学性质；(2)桩上轴力的变化反映了封闭桩对土体的压实作用大于明桩；(3) 穿深开始时，开桩桩身和端部阻力的变化与封闭桩不同；