旁压试验在岩土工程勘察中的应用研究  

Research on the Application of Side Pressure Test in Geotechnical Engineering Investigation

作　　者：潘天有 Pan Tianyou

机构地区：[1]漳州市建设工程施工图咨询审查有限公司,福建漳州363000

出　　处：《江苏建材》2024年第6期72-74,共3页Jiangsu Building Materials

摘　　要：以某项目勘察为背景,首先阐述了预钻式旁压试验特点和原理、“PY-4”型预钻式旁压仪的技术参数,通过该预钻式旁压仪对研究区强风化砂岩进行旁压试验,获得了强风化砂岩的初始压力、临塑压力、旁压剪切模量、旁压模量等物理力学参数及变化规律。研究表明,13.5 m深度的旁压剪切模量和旁压模量分别4.38 MPa和10.52 MPa;22.5 m深度的旁压剪切模量和旁压模量分别5.83 MPa和13.95 MP;随着深度的增加,强风化砂岩的旁压剪切模量、旁压模量、初始压力和临塑压力均呈增大趋势,且旁压剪切模量和旁压模量的增幅随深度增大,初始应力的增长速率比临塑压力的增长速率大。研究区强风化砂岩表现出良好的强度特性。Based on the background of a project survey,the characteristics and principles of the pre-drilled pressure test and the technical parameters of the"PY-4"type pre-drilled pressure test,through which the pressure test of the strongly weathered sandstone in the study area was carried out,and the physical and mechanical parameters and changes of the strong weathered sandstone,such as the initial pressure,the plastic pressure,the shear modulus and the side pressure modulus,were obtained.The results show that the shear modulus and 10.52 MPa at a depth of 13.5 m are 4.38 MPa and 10.52 MPa,respectively.The shear modulus and 13.95 MP at the depth of 22.5 m were 5.83 MPa and 13.95 MP,respectively.With the increase of depth,the shear modulus,the initial pressure and the plastic pressure of the strongly weathered sandstone all increase,and the increase of the shear modulus and the pressure of the pressure increases with depth,and the growth rate of the initial stress is larger than that of the plastic pressure.The strongly weathered sandstone in the study area shows good strength characteristics.

关 键 词：旁压试验 岩土工程勘察 旁压剪切模量 旁压模量 承载力特征值 

分 类 号：TU312[建筑科学—结构工程]