旁压试验在郑州轨道交通岩土工程勘察中的应用  

Application of Pressuremeter Test to Geotechnical Investigations of Zhengzhou Rail Transits

作　　者：于新政[1] 刘汉东[2] 石守亮[1] 何建锋[1] 郭小帅[1] 

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003 [2]华北水利水电大学,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2015年第3期68-71,共4页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

摘　　要：旁压试验的特点是测试深度深、不受地下水影响,已经成为岩土工程勘察的重要手段之一,广泛应用于轨道交通、桥梁等大型岩土工程勘察中.以郑州市轨道交通岩土工程勘察为例,通过旁压试验,综合分析试验结果并据此测求试验土层的物理力学参数(地基承载力、变形模量、压缩模量、抗剪强度等),并与标准贯入试验、静力触探试验、室内土工试验的测试结果进行对比分析,得出了旁压试验在郑州地区类似工程勘察中的推荐计算公式和参数,即承载力计算采用极限荷载法,安全系数可取2.0;压缩模量可运用公式(4)计算;抗剪强度可采用公式(6)计算.The pressuremeter test characterized by a deeper test depth and without affected by groundwater,has become one of the important means of geotechnical investigations and is widely used in large geotechnical investigations of rail transits,bridges and so on.For geotechnical investigations of Zhengzhou rail transits,the pressuremeter test was conducted,the physical and mechanical parameters of test soils were measured based on the comprehensive analysis of experimental results,such as bearing capacity of foundation,deformation modulus,compression modulus,shear strength,and so on. Compared with the results of standard penetration test,static cone penetration test,indoor soil test,the recommended formulas and parameters of pressuremeter test in the similar geotechnical investigations in Zhengzhou area were obtained,namely,the calculation of bearing capacity can adopt ultimate load method,then the safety factor can be 2. 0,the calculation of compression modulus can adopt equation（ 4）,and the calculation of shear strength can adopt equation（ 6）.

关 键 词：旁压试验 轨道交通 原位测试 岩土工程勘察 

分 类 号：TU413[建筑科学—岩土工程]