水泥固化粉质土的无侧限抗压强度预测
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摘要
对以粉质土为原料的水泥固化土进行了不同水泥掺入比、水灰质量比、龄期的系列试验.水泥掺入比相同时,水灰质量比越大,水泥固化粉质土的无侧限抗压强度越低;水灰质量比相同时,水泥掺入比越大,水泥固化粉质土的无侧限抗压强度越高,同时得出了水泥固化粉质土的无侧限抗压强度与似水灰质量比的倒数呈现线性关系,对于某一原料土,最大似水灰质量比是一个常值.基于似水灰质量比概念研究了水泥固化粉质土的强度预测方法,在28d龄期下,已知在某一水泥掺入比和水灰质量比的条件下的水泥固化粉质土的无侧限抗压强度值,即可用该方法预测其他龄期、水泥掺入比、水灰质量比条件下的水泥固化粉质土的无侧限抗压强度;水泥固化粉质土最大似水灰质量比R0与粉质土液限WL的关系不能用已有的经验关系式表示,其变化规律与已有的经验关系式给出的规律相反.
A series of laboratory tests were performed on cemented silty soils to understand their strength behavior.With the same cement content,the greater the water-cement ratio is,the lower the unconfined compressive strength of cemented silty soils is;with the same watercement ratio,the greater the cement content is,the higher the unconfined compressive strength of cemented silty soils is.At the same time,the test results indicate that the unconfined compressive strength increases linearly with the inverse of quasi-water-cement ratio which is defined as the ratio of the total water weight to the cement weight before mixing,and the maximum quasi-water-cement ratio of original soils is a fixed constant.The method of predicting the unconfined compressive strength is discussed for cemented silty soils.With the unconfined compressive strength of cemented silty soils of 28 days under specific cement content and water-cement ratio,the unconfined compressive strength of cemented silty soils of other curing time,cement content and water-cement ratio can be predicted.The relationship between the maximum quasi-water-cement ratio and the liquid limit of original soils is also investigated.The relationship between the maximum quasi-water-cement ratio and the liquid limit of cemented silty soils does not fit the existing empirical formula,its variation regularity is contrary to the latter.
A series of laboratory tests were performed on cemented silty soils to understand their strength behavior.With the same cement content,the greater the water-cement ratio is,the lower the unconfined compressive strength of cemented silty soils is;with the same watercement ratio,the greater the cement content is,the higher the unconfined compressive strength of cemented silty soils is.At the same time,the test results indicate that the unconfined compressive strength increases linearly with the inverse of quasi-water-cement ratio which is defined as the ratio of the total water weight to the cement weight before mixing,and the maximum quasi-water-cement ratio of original soils is a fixed constant.The method of predicting the unconfined compressive strength is discussed for cemented silty soils.With the unconfined compressive strength of cemented silty soils of 28 days under specific cement content and water-cement ratio,the unconfined compressive strength of cemented silty soils of other curing time,cement content and water-cement ratio can be predicted.The relationship between the maximum quasi-water-cement ratio and the liquid limit of original soils is also investigated.The relationship between the maximum quasi-water-cement ratio and the liquid limit of cemented silty soils does not fit the existing empirical formula,its variation regularity is contrary to the latter.
引文
[1]中国建筑科学研究院.建筑地基处理技术规范[S].北京:中国建筑工业出版社,2002.
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[3]杨滨,顾小安,黄寅春,等.水泥土的强度特性[J].公路,2006(7):130-135.Yang Bin,Gu Xiaoan,Huang Yinchun,et al.Strengthcharacteristics of cement-stabilized soil[J].Highway,2006(7):132-135.(in Chinese)
[4]汤怡新,刘汉龙,朱伟.水泥固化土工程特性试验研究[J].岩土工程学报,2000,22(5):549-554.Tang Yixin,Liu Hanlong,Zhu Wei.Study on engineer-ing properties of cement-stabilized soil[J].ChineseJournal of Geotechnical Engineering,2000,22(5):549-554.(in Chinese)
[5]Horpibulsuk S,Miura N,Nagaraj T S.Assessment ofstrength development in cement-admixed high watercontent clays with Abrams law as a basis[J].G啨otechnique,2003,53(4):439-444.
[6]储成富.水泥土搅拌法加固特殊软土的试验与应用研究[D].南京:东南大学,2005.
[7]储诚富,洪振舜,刘松玉,等,用似水灰比对水泥土无侧限抗压强度的预测[J].岩土力学.2005,26(4):645-649.Chu Chengfu,Hong Zhenshun,Liu Songyu.et al.Pre-diction of unconfined compressive strength of cementedsoils with quasi-water-cement ratio[J].Rock and SoilMechanics,2005,26(4):645-649.(in Chinese)
[8]东南大学,河海大学,江苏水源有限责任公司.高地震烈度区泵站地基抗液化和防渗措施研究[R].南京,2007.
[9]交通部公路科学研究所.JTJ051—93公路土工试验规程[S].北京:人民交通出版社,1993.
[2]涂帆,常方强.水泥土无侧限抗压强度影响因素的室内试验研究[J].工程勘测,2005(3):8-10.Tu Fan,Chang Fangqiang.Experimental study on influ-encing factors of unconfined compression strength forcement soil[J].Geotechnical Investigation and Survey-ing,2005(3):8-10.(in Chinese)
[3]杨滨,顾小安,黄寅春,等.水泥土的强度特性[J].公路,2006(7):130-135.Yang Bin,Gu Xiaoan,Huang Yinchun,et al.Strengthcharacteristics of cement-stabilized soil[J].Highway,2006(7):132-135.(in Chinese)
[4]汤怡新,刘汉龙,朱伟.水泥固化土工程特性试验研究[J].岩土工程学报,2000,22(5):549-554.Tang Yixin,Liu Hanlong,Zhu Wei.Study on engineer-ing properties of cement-stabilized soil[J].ChineseJournal of Geotechnical Engineering,2000,22(5):549-554.(in Chinese)
[5]Horpibulsuk S,Miura N,Nagaraj T S.Assessment ofstrength development in cement-admixed high watercontent clays with Abrams law as a basis[J].G啨otechnique,2003,53(4):439-444.
[6]储成富.水泥土搅拌法加固特殊软土的试验与应用研究[D].南京:东南大学,2005.
[7]储诚富,洪振舜,刘松玉,等,用似水灰比对水泥土无侧限抗压强度的预测[J].岩土力学.2005,26(4):645-649.Chu Chengfu,Hong Zhenshun,Liu Songyu.et al.Pre-diction of unconfined compressive strength of cementedsoils with quasi-water-cement ratio[J].Rock and SoilMechanics,2005,26(4):645-649.(in Chinese)
[8]东南大学,河海大学,江苏水源有限责任公司.高地震烈度区泵站地基抗液化和防渗措施研究[R].南京,2007.
[9]交通部公路科学研究所.JTJ051—93公路土工试验规程[S].北京:人民交通出版社,1993.
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