混凝土扩盘桩抗压破坏机理的现场大比例半面桩试验研究

TEST STUDY OF FAILURE MECHANISM OF LARGE PROPORTION BISECTED CEP PILE UNDER COMPRESSION LOAD

运用全新的试验方法,对混凝土扩盘桩进行现场大比例半截面实桩试验,全过程观测混凝土扩盘桩在受压状态下桩周土体从加载到破坏的整体情况,验证已有的理论分析和模型试验的结果,确定混凝土扩盘桩在竖向压力作用下桩周土体破坏机理,为进一步确定混凝土扩盘桩在受压状态下的极限承载力奠定了可靠的基础,为变截面桩的试验研究提供了一种全新的方法。

In the paper,the quite new test method was introduced,which was tested the large proportion bisceted concrete expanded-plate（ CEP） pile. Through it,the total process and state about failure of the soil surrounding the pile under the compression for CEP（ concrete expanded-plate） pile could be observed directly from loading to destruction. The existing theoretical analysis and model test results could be verified,the failure mechanism of the soil surrounding the pile could be determined for the CEP pile under vertical loads,which would set out a reliable foundation to confirm ultimate bearing capacity of the CEP pile under the vertical compression further. The new method would provided a new way to research of variable cross-section pile.