摘要
中生界白垩系沉积岩在华北地区分布较为普遍,岩性为紫红色、灰绿色泥岩。泥岩的主要矿物成分为黏土和高岭土,遇水易软化,强度低。为了获得可靠的泥岩抗剪强度指标,选择某广场工程施工开挖的基坑作为试验场地,原位进行了岩体直剪试验,通过对试验资料的分析整理,提出了泥岩的抗剪强度指标。
The Mesozoic Cretaceous sedimentary rocks are widely distributed in north China,and the lithology is purple-red and gray-green mudstone.In order to determine the resistance of mudstone to direct shear failure,the internal friction coefficient(tgφ)and cohesion(c)of mudstone are determined,the direct shear strength parameters are provided for the stability analysis of foundation(dam),underground structure and slope,and the field large-scale shear test of rock mass is a direct method to obtain the shear strength Index of rock mass.
作者
冯建国
FENG Jianguo(Hebei Research Institute of Investigation&Design of Water Conservancy&Hydropower,Tianjin 300250,China)
出处
《水科学与工程技术》
2021年第2期94-96,共3页
Water Sciences and Engineering Technology
关键词
泥岩
原位岩体直剪试验
岩体内摩擦系数
岩体黏聚力
mudstone
field large-scale shear(fracture)test
internal friction coefficient of rock mass
cohesion