深厚软土地基孔隙水压力计埋设应用及问题分析

Embedded Application and Issues for Analysis of Pore Water Pressure Gauge in Deep Soft Soil Foundation

针对孔隙水压力计埋设过程中存在的问题,探讨适合于深厚软土地基的埋设方式和改进措施,并在软基加固工程中应用。工程实践结果表明,通过分析常压率定方式误差,采用现场常压率定是可行的。利用砂袋包裹透水石,结合引导装置,处理了孔压计安放不到设计位置的问题,完成了一孔安放两个孔压计。制作基础梁固定孔压计,可以有效防止因孔内土体压缩而导致传感器在埋设部位沉降的问题。依照本文的埋设方式,有效提高了孔压计安装埋设的质量和成功率,得到较为可靠的监测结果。

Based on traditional embedding methods of pore water pressure gauge with technical difficulties,embedding methods and its improvement measures for deep soft soil foundation are studied,which is applied in the soft foundation reinforcement engineering. Practice results show that it is feasible to use the in-situ ordinary pressure calibration through the analysis of the normal pressure calibration error. The bag wrapped permeable stone with guiding device solved that the pore water pressure gauge laying is not in place,to achieve a hole embedded two pore water pressure gauge. The foundation beam fixed pore water pressure gauge can effectively prevent the settlement of sensor caused by compression of soil hole.This method can effectively improve the pore water pressure gauge installation quality and success rate,and reliable monitoring results are obtained.