基于PMT的全风化花岗岩力学参数研究  

Mechanical Parameters of Completely Weathered Granite by Using Pressuremeter Test

作　　者：张玉雪 ZHANG Yuxue(Yunji Smart Engineering Co.Ltd.,Shenzhen 518049)

机构地区：[1]云基智慧工程股份有限公司,广东深圳518049

出　　处：《土工基础》2024年第4期735-738,共4页Soil Engineering and Foundation

摘　　要：预钻式旁压试验具有对土体扰动小、适应能力强、成果直观等特点,适用于全风化花岗岩的勘察。以深圳侨城东路北延通道工程-第一标段勘察为例,介绍了预钻式旁压试验的原理及试验过程。通过现场勘察获取了研究区不同勘探点的全风化花岗岩的P-V曲线,并计算出各自的旁压剪切模量、旁压模量、地基承载力特征值等力学特性。研究表明,全风化花岗岩相关力学参数随深度增大而逐渐增大。旁压试验测得的地基承载力特征值与标准贯入试验的结果相近,略大于标准贯入试验的结果,说明了旁压试验的合理性。采用的方法与所得的结果可供类似工程参考。The prebored pressuremeter test has the characteristics of small soil disturbance,strong adaptability,and intuitive results.It is suitable for the exploration of the completely weathered granite.This article is based on the survey of the first section of the North Extension Channel Project of Qiaocheng East Road and provides a detailed introduction to the principles and testing process of the prebored pressuremeter test.The P-V curves of the completely weathered granite at the different exploration points in the study area were obtained through the on-site investigation,and the mechanical properties such as the shear modulus,pressuremeter modulus,and characteristic values of the soil bearing capacity were presented.The results show that the mechanical parameters related to the fully weathered granite gradually increase with the increasing of the testing depth.The characteristic values of the soil bearing capacity measured by the pressuremeter test are similar to but slightly larger than the results of the standard penetration test,which indicates the reasonableness of the pressuremeter test.

关 键 词：旁压试验 全风化花岗岩 旁压剪切模量 旁压模量 地基承载力特征值 

分 类 号：TU457[建筑科学—岩土工程]