土工基础

›› 2017, Vol. 31 ›› Issue (6): 779-782.

• 工程实录 • 上一篇    

基于硅压阻式传感器的静压桩贯入模型桩土界面应力测试

王永洪1,2 ,张明义1,2，桑松魁1,2，苗德滋1,2   

  1. （1.青岛理工大学，山东青岛 266033；2.蓝色经济区工程建设与安全协同创新中心，青岛理工大学，山东青岛 266033）
  • 收稿日期:2017-09-05 修回日期:2017-09-21 出版日期:2017-12-20 发布日期:2017-12-27
  • 作者简介:王永洪(1984-)，男，博士研究生，研究方向为土力学与桩基础工程。

Lateral Earth Pressure Measurement on the Pile-Soil Interface for the Jacked Pile Installation Using Silicon Piezoresistive Sensors

WANG Yonghong1,2 , ZHANG Mingyi1, 2 , SANG Songkui1,2 , MIAO Dezi1,2   

  1. (1.School of Civil Engineering, Qingdao Technological University, Qingdao, 266033;
    2.Collaborative Innovation Center of Engineering Construction and Safety, Shandong Blue Economic Zone, 
    Qingdao Technological University, Qingdao, 266033)
  • Received:2017-09-05 Revised:2017-09-21 Online:2017-12-20 Published:2017-12-27

摘要： 静压桩贯入时要求传感器具备高灵敏度和准确性，还要求其动态频响高、测量范围宽及尺寸小。针对静压桩贯入模型试验，采用硅压阻式土压力和孔隙水压力传感器分别记录贯入过程中在桩土界面产生的侧压力和孔隙水压力，并对测试结果进行分析。结果表明：硅压阻式传感器适用于静压桩贯入模型试验，可以准确测试桩土界面侧压力和孔隙水压力随贯入深度的变化规律。

关键词: 硅压阻式传感器, 静压桩, 贯入, 桩土界面, 应力测试

Abstract: Silicon piezoresistive sensors have the characters of having high sensitivity, high accuracy, high dynamicfrequency, wide measuring range and small size. These characteristics can be used to monitor the jacked pile installation. The silicon piezoresistive earth pressure sensors and pore water pressure sensors were used to test lateral pressure and pore water pressure at the interface between the pile and the soil. The test results show that the silicon piezoresistive sensors can be used to monitor the jacked pile installation for they can accurately measure the lateral earth pressure and the pore water pressure at the interface between the pile and the soil at various installation depths.

Key words: Silicon Piezoresistive Sensors, Jacked Pile, Installation, Interface Between Pile and Soil, Lateral Earth Pressure Measurement