毛乌素沙漠边缘湿软地基工程地质性质的研究
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摘要
通过对陕西靖边至王圈梁地区地基土的颗粒成分、物质组成等物理性质和力学性质的研究,对公路沿线湿软地基的工程地质性质有了一个较全面的认识,得出该区地基具轻微盐渍化,液化严重,天然承载力低等特点,这对在建的高速公路建设具有重大的指导意义。
In order to investigate the engineering geological properties of the saturated clay foundation along the Jingbian-Wangquanliang expressway,many in-situ and laboratory researches had been done,including in-situ standard penetration test,cone penetration test and geotechnical tests in the laboratory.The physical properties such as content of fine grains,chemical composition and so on,and mechanical properties of the saturated clay foundation have been understood.It is found that most soft ground haven't the characteristics of soft soil in the studied area,but the variation of the condensation coefficient is relatively large,roughly between 0.05 and 0.33MPa -1,which may result in inhomogeneous settlement.This soft ground has slight salinity; liquefaction is serious in the shallow strata 12m deep; the friction angle is 30°and its cohesion is 10kPa; the bearing capacity of foundation is less than 100kPa in the depth less than 3m and less than 140kPa within the depth less than 5m.
In order to investigate the engineering geological properties of the saturated clay foundation along the Jingbian-Wangquanliang expressway,many in-situ and laboratory researches had been done,including in-situ standard penetration test,cone penetration test and geotechnical tests in the laboratory.The physical properties such as content of fine grains,chemical composition and so on,and mechanical properties of the saturated clay foundation have been understood.It is found that most soft ground haven't the characteristics of soft soil in the studied area,but the variation of the condensation coefficient is relatively large,roughly between 0.05 and 0.33MPa -1,which may result in inhomogeneous settlement.This soft ground has slight salinity; liquefaction is serious in the shallow strata 12m deep; the friction angle is 30°and its cohesion is 10kPa; the bearing capacity of foundation is less than 100kPa in the depth less than 3m and less than 140kPa within the depth less than 5m.
引文
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[2]孟高头.土体原位测试机理方法及其工程应用[M].北京:地质出版社,1997.
[3]WolfJ,著.吴世明,等译.土结构动力相互作用[M].北京:地震出版社,1989.
[4]吴世明,等.土动力学[M].北京:中国建筑工业出版社,2000.
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