长春地区白垩系地层地铁勘察参数的确定
摘要:白垩系砾岩及泥岩地层在长春地区普遍存在,但由于砾岩地层现场钻探难以取样进行室内土工试验,泥岩地层由于存在水稳性、膨胀性、崩解性等因素影响,砾岩和泥岩的承载力值、抗剪强度参数指标、渗透系数以及基床系数等参数多以经验数据评估方法为主,在合理准确确定相关参数的问题上存在较大分歧。通过对长春地区白垩系砾岩及泥岩进行原位平板载荷试验、浸水载荷试验以及现场原位剪切试验,获取砾岩、泥岩的承载力值、抗剪强度指标、渗透系数以及现场基床系数值等,为地铁建设工程地质问题分析及设计提供充足的地质依据。
Abstract:Cretaceous conglomerate and mudstone universally exist in Changchun district,but conglomerate is difficult for sample drilling to do laboratory tests; mudstone is affected by many factors such as water stability,expansibility and slaking; many parameters,such as bearing capacity value,shear test parameter,permeability coefficient and coefficient of subgrade reaction,confirm mainly by empirical data evaluation method,There has a big difference on parameter rationality and accuracy.The article proposed bearing capacity values,shear strength,parameters,permeability and in-situ coefficient of subgrade reaction and so on by in-situ plate loading test,water immersion loading test and in-situ shear test on mudstone and conglomerate of cretaceous strata in Changchun district,,providing a geological reference for subway design and construction.
中文标题:
长春地区白垩系地层地铁勘察参数的确定
Subway Investigation Parameters Analysis and Determination of Cretaceous Strata in Changchun District
作者:
郭红梅
Guo Hongmei
作者简介:郭红梅,女,1972年生,汉族,河北人,博士,教授级高级工程师,主要从事岩土工程勘察及岩土工程研究及设计工作。E-mail:guohongmei@gki.com.cn
通讯地址:
北京城建勘测设计研究院有限责任公司, 北京 100101
BeijingUrbanConstructionExploration&DesignResearchInstituteCo.,Ltd.,Beijing100101,China
中图分类号:TU192
doi:10.3969/j.issn.1007-2993.2019.02.003
出版物:岩土工程技术
收稿日期:2018-07-30
网络出版日期:2021-07-06
关键词:白垩系地层,平板载荷试验,浸水载荷试验现场,原位剪切试验,基床系数
Key words:cretaceous strata,in-situ plate loading test,water immersion loading test,in-situ shear test,coefficient of subgrade reaction
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