三岔挤扩灌注桩与直孔桩的工程应用及现场试验对比分析

本文对实际工程中三岔挤扩灌注桩(简称DX桩)与直孔桩的抗压试验数据进行了对比分析,分析表明由于三岔挤扩灌注桩有承力盘或承力岔,其受力呈现为摩擦端承桩受力模式,相比直孔桩其具有承载能力大、沉降小的良好受力性能,三岔挤扩灌注桩具有很好的工程应用前景。

Engineering Applications and On-site Experimental Comparative Analysis of DX Piles and Isometric Section Piles

The tested data between cast-in-place piles with expanded branches and bells by 3-way extruding arms （ DX piles ） and isometric section piles were analyzed and contrasted in this paper. DX piles present friction and multi- point bearing piles modes because DX piles have branches bearings and bell bearings. Therefore, DX piles take on big- ger bearing capacity and less sedimentation than isometric section piles. DX piles can be widely applied to bridge-foun- dation engineering.