双桥静力触探的“超前”效应在土层划分的应用  

The application of the“Advance”effect of double bridge static penetration test in soil layer division

作　　者：刘俊 秦宗浩 Liu Jun;Qin Zonghao(Changzhou Building Science Academy Group Co.,Ltd.,Changzhou Jiangsu 213000,China)

机构地区：[1]常州市建筑科学研究院集团股份有限公司,江苏常州213000

出　　处：《山西建筑》2023年第23期79-81,85,共4页Shanxi Architecture

摘　　要：通过对钻探资料与双桥静力触探曲线的对比分析,研究了双桥静力触探的“超前深度”效应。通过在常州地区某场地均匀布置的9组试验孔进行原位测试,利用GXY-100型工程钻机进行钻探,并采用SK-JT-W1型带测斜仪探头进行静力触探。试验结果表明,在不同土层的分界面附近,静力触探曲线会出现超前现象,即在土层分界面之上一定范围内,曲线会表现出下一土层的特性。通过比较钻孔揭露的土层划分与静探孔力学分层,得出了具体的超前深度数值。Through comparatively analyzing drilling data and double-bridge static sounding curve,the paper studies the“advance”effect of double-bridge static sounding.It carries out in-situ test for 9 sets of evenly arranged testing holes,drilling with GXY-100 engineering driller,and static sounding with SK-JT-WI clinometer probe in Changzhou region.The test results show that the static penetration curve will be advanced near the boundary of different soil layers,that is,the curve will show the characteristics of the next soil layer in a certain range above the boundary of soil layers.By comparing the soil layer division exposed by borehole with the mechanical stratification of static borehole,it obtains specific advance depth value.

关 键 词：静力触探 钻探资料 超前深度 土层划分 

分 类 号：TU411[建筑科学—岩土工程]