软土加固新工艺Y形桩在嘉兴高速公路软基的应用

介绍了申嘉湖高速公路嘉兴段应用软土加固新工艺Y形沉管灌注桩(简称Y形桩)处理高速公路桥头跳车的现场试验研究。通过桩身质量检测,高、低应变测试,竖向和水平向静载等试验,证明Y形桩的成桩质量可靠。从桩土荷载、孔隙水压力、表面沉降、分层沉降、水平位移等方面对监测断面进行了观测。综合分析表明,Y形桩处理桥头软基具有技术优越、经济合理等优点。

Application of Driven Cast-in-situ Y Pile in Reinforcement of Soft Soil Foundation as a New Technology

The experimental research of driven cast-in-situ Y pile applied in treatment of bridgehead jumping in Jiaxing section of Shen-Jia-Hu highway is introduced.Based on the results of pile quality test,high train and low train test,vertical and horizontal static load test,it is proved that construction quality of the driven cast-in-situ Y pile is reliable.Monitoring sections such as pile-soil load,pore water pressure,surface settlement,layer settlement and horizontal displacement of monitoring cross section are measured.Synthesis analysis indicates that the driven cast-in-situ Y pile used for treatment of soft soil foundation of bridgehead shows the superiority in technology and cost comparing with others.