基于正交试验法的洞庭湖区水泥土影响因素重要性探讨
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摘要
本文针对洞庭湖区某分洪闸工程的淤泥质土地基水泥土搅拌桩加固技术,探讨不同影响因素对水泥土力学性能的影响.利用正交试验法对该淤泥质土水泥土进行室内配比试验,研究水灰比、水泥掺量和搅拌时间对水泥土无侧限抗压强度、含水率及土样溶液pH的影响.结果表明:影响水泥土无侧限抗压强度的因素重要性次序分别为水灰比、水泥掺量、搅拌时间;水灰比对含水率的影响起主要作用,水灰比越大含水率越高;相比其他因素,水泥掺量对pH的影响更重要,水泥掺量越高,所测pH越大.
The reinforcement technology of cement-soil mixing piles for silty soil foundation in a floodgate project in Dongting Lake area is discussed to explore the influence of different factors on the mechanical properties of cement soil.The orthogonal test method is used to conduct indoor mixture ratio tests on this cement soil material,by which the influences of water-cement ratio,cement ratios and mixing time on the unconfined compressive stress(UCS),moisture content,and pH of cement soil are investigated.The results show that the order of importance of factors affecting unconfined compressive strength of cement soil is watercement ratio,cement content,and mixing time;water-cement ratio plays a major role in effecting water content;and the water content increases with water-cement ratio rises;compared to other factors,cement content is more important for pH;and the higher the cement content,the higher the measured pH.
The reinforcement technology of cement-soil mixing piles for silty soil foundation in a floodgate project in Dongting Lake area is discussed to explore the influence of different factors on the mechanical properties of cement soil.The orthogonal test method is used to conduct indoor mixture ratio tests on this cement soil material,by which the influences of water-cement ratio,cement ratios and mixing time on the unconfined compressive stress(UCS),moisture content,and pH of cement soil are investigated.The results show that the order of importance of factors affecting unconfined compressive strength of cement soil is watercement ratio,cement content,and mixing time;water-cement ratio plays a major role in effecting water content;and the water content increases with water-cement ratio rises;compared to other factors,cement content is more important for pH;and the higher the cement content,the higher the measured pH.
引文
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[6]邢皓枫,杨晓明,徐超,等.水泥和添加剂对高含盐水泥土强度的影响[J].同济大学学报(自然科学版),2008(8):1062-1066.
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[8]阮波,阮庆,田晓涛,等.淤泥质粉质黏土水泥土无侧限抗压强度影响因素的正交试验研究[J].铁道科学与工程学报,2013,10(6):45-48.
[9]阮庆,阮波,曾元,等.洞庭湖区淤泥质黏土水泥土力学性能试验研究[J].铁道科学与工程学报,2014,11(5):106-111.
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[11]中华人民共和国行业标准.JGJ/T233-2011.水泥土配合比试验规程[S].北京:中国建筑工业出版社,2011.
[12]中华人民共和国行业标准.SL237-1999.土工试验方法标准[S].北京:中国水利水电出版社,1999.
[2]崔新壮,龚晓南,李术才,等.盐水环境下水泥土桩劣化效应及其对道路复合地基沉降的影响[J].中国公路学报,2015,28(5):66-76,86.
[3]Horpibulsuk S,Miura N,Nagaraj T S.Clay-water/Cement Ratio Identity of Cement Admixed Soft Clays[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(2):187-192.
[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.
[5]朱大宇.水泥土力学性能的试验分析[J].建筑材料学报,2006,9(3):291-296.
[6]邢皓枫,杨晓明,徐超,等.水泥和添加剂对高含盐水泥土强度的影响[J].同济大学学报(自然科学版),2008(8):1062-1066.
[7]王贤昆,庞建勇,王强.复合水泥土无侧限抗压强度正交试验研究[J].长江科学院院报,2015,32(12):72-75.
[8]阮波,阮庆,田晓涛,等.淤泥质粉质黏土水泥土无侧限抗压强度影响因素的正交试验研究[J].铁道科学与工程学报,2013,10(6):45-48.
[9]阮庆,阮波,曾元,等.洞庭湖区淤泥质黏土水泥土力学性能试验研究[J].铁道科学与工程学报,2014,11(5):106-111.
[10]陈启宏.洞庭湖区淤泥质土水泥土强度特性研究[D].株洲:湖南工业大学,2015.
[11]中华人民共和国行业标准.JGJ/T233-2011.水泥土配合比试验规程[S].北京:中国建筑工业出版社,2011.
[12]中华人民共和国行业标准.SL237-1999.土工试验方法标准[S].北京:中国水利水电出版社,1999.