含腐殖酸水泥土的强度特性研究
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摘要
因南沙有机质软土的不良工程性质常需使用水泥进行固化处理,软土有机质中对固化效果影响最大的是腐殖酸。本文以南沙重塑软土为研究对象,通过无侧限抗压强度试验分析了腐殖酸对水泥土强度特性的影响规律。结果表明:含腐殖酸的水泥土无侧限抗压强度随着腐殖酸含量的增加而降低,随着龄期和水泥含量的增加得到了提高。腐殖酸对于水泥土强度有明显影响,但随着腐殖酸含量的增加,其影响效果明显减弱;对于一定含量腐殖酸的水泥土,当水泥含量增加到一定程度后,强度会随着水泥的增加呈现较为明显的提高。
Due to the poor engineering properties of Nansha organic soft soil, it is often necessary to use cement for solidification treatment. The most important factor on the solidification effect of soft soil organic matter is humus.In this paper, Nansha remolded soft soil are studied, and the influence of humus on the strength characteristics of cemented soil was analyzed by unconfined compressive strength test.The results show that the unconfined compressive strength of cement soil containing humus decreases with the increase of humus content, but increases with the increase of age and cement content.Humus has a significant effect on the strength of cement soil, but when content of humus reaching some point, its effect will obviously weakened; for cement soil with a certain content of humus, when the cement content increases to a certain extent, the strength of cement soil with humus will increase significantly with the increase of cement.
Due to the poor engineering properties of Nansha organic soft soil, it is often necessary to use cement for solidification treatment. The most important factor on the solidification effect of soft soil organic matter is humus.In this paper, Nansha remolded soft soil are studied, and the influence of humus on the strength characteristics of cemented soil was analyzed by unconfined compressive strength test.The results show that the unconfined compressive strength of cement soil containing humus decreases with the increase of humus content, but increases with the increase of age and cement content.Humus has a significant effect on the strength of cement soil, but when content of humus reaching some point, its effect will obviously weakened; for cement soil with a certain content of humus, when the cement content increases to a certain extent, the strength of cement soil with humus will increase significantly with the increase of cement.
引文
[1]谢伟锋,刘金刚,邓迎芳,等.广州南沙某工程大面积软土基坑施工探讨[J].广州建筑, 2009,37(01):30-32.
[2]朱烈.软土地区超大吨位桩基静载试验支墩地基处理方法研究[J].广州建筑, 2016,44(04):27-30.
[3] Christensen A P. CEMENT MODIFICATION OF CLAY SOILS[J]. Portland Cement Assoc R&D Lab Bull, 1969.
[4]黄新,周国钧.水泥加固土硬化机理初探[J].岩土工程学报, 1994,16(1):62-68.
[5] Yong X. The anti-influences and influences of containing organic matter on cement soil strength[J]. Buildingence Research of Sichuan, 2000.
[6]荀勇.含工业废料的水泥系固化剂加固软土试验研究[J].岩土工程学报, 2000,22(2):210-213.
[7]郭宏峰.有机质对水泥土强度影响的机理研究[D].同济大学, 2008.
[8]范昭平,朱伟,张春雷.有机质含量对淤泥固化效果影响的试验研究[J].岩土力学, 2005,26(8):1327-1330.
[9]邵玉芳,龚晓南,徐日庆,等.腐殖酸对水泥土强度的影响[J].江苏大学学报(自然科学版), 2007,28(4):354-357.
[10]朱伟,曾科林,张春雷.淤泥固化处理中有机物成分的影响[J].岩土力学, 2008,29(1):33-36.
[11]张树彬,王清,陈慧娥,等.土体腐殖质对水泥土固化的影响[J].吉林大学学报(地), 2005,35(2):218-220.
[12] Chen H, Wang Q. The behaviour of organic matter in the process of soft soil stabilization using cement[J]. Bulletin of Engineering Geology&the Environment, 2006,65(4):445-448.
[2]朱烈.软土地区超大吨位桩基静载试验支墩地基处理方法研究[J].广州建筑, 2016,44(04):27-30.
[3] Christensen A P. CEMENT MODIFICATION OF CLAY SOILS[J]. Portland Cement Assoc R&D Lab Bull, 1969.
[4]黄新,周国钧.水泥加固土硬化机理初探[J].岩土工程学报, 1994,16(1):62-68.
[5] Yong X. The anti-influences and influences of containing organic matter on cement soil strength[J]. Buildingence Research of Sichuan, 2000.
[6]荀勇.含工业废料的水泥系固化剂加固软土试验研究[J].岩土工程学报, 2000,22(2):210-213.
[7]郭宏峰.有机质对水泥土强度影响的机理研究[D].同济大学, 2008.
[8]范昭平,朱伟,张春雷.有机质含量对淤泥固化效果影响的试验研究[J].岩土力学, 2005,26(8):1327-1330.
[9]邵玉芳,龚晓南,徐日庆,等.腐殖酸对水泥土强度的影响[J].江苏大学学报(自然科学版), 2007,28(4):354-357.
[10]朱伟,曾科林,张春雷.淤泥固化处理中有机物成分的影响[J].岩土力学, 2008,29(1):33-36.
[11]张树彬,王清,陈慧娥,等.土体腐殖质对水泥土固化的影响[J].吉林大学学报(地), 2005,35(2):218-220.
[12] Chen H, Wang Q. The behaviour of organic matter in the process of soft soil stabilization using cement[J]. Bulletin of Engineering Geology&the Environment, 2006,65(4):445-448.