微生物及水泥固化砂土的力学特性对比试验研究

赵晓婉; 吕进; 王梅花; 黄慕凡; 许鹏旭; 彭劼

doi:10.13204/j.gyjzG20052521

微生物及水泥固化砂土的力学特性对比试验研究

doi: 10.13204/j.gyjzG20052521

赵晓婉^1,2,
吕进³,
王梅花³,
黄慕凡^1,2,
许鹏旭^1,2,
彭劼^1,2, ,

1. 河海大学岩土力学与堤坝工程教育部重点实验室, 南京 210098;
2. 江苏省岩土工程技术工程研究中心(河海大学), 南京 210098;
3. 南京市秦淮河河道管理处, 南京 210001

基金项目:

国家自然科学基金项目（51578124）。

详细信息

作者简介:
赵晓婉,女,1996年出生,硕士研究生。

通讯作者:
彭劼,男,1971年出生,博士,教授,博士研究生导师,peng_jie@hhu.edu.cn。

计量
- 文章访问数: 105
- HTML全文浏览量: 8
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2020-05-25
- 网络出版日期: 2021-03-31

COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT

ZHAO Xiaowan^1,2,
LYU Jin³,
WANG Meihua³,
HUANG Mufan^1,2,
XU Pengxu^1,2,
PENG Jie^{1,2
, ,}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Jiangsu Research Center for Geotechnical Engineering Technology(Hohai University), Nanjing 210098, China;
3. The Qinhuai River Management Office, Nanjing 210001, China

摘要

摘要: 微生物诱导碳酸钙沉积（MICP）是近年来在土体加固领域的研究热点，但对MICP技术加固砂土与传统水泥加固砂土力学特性的对比尚不充分。为进一步明确MICP加固砂样和水泥砂浆试样的力学特性，分别制作了MICP固化砂柱和水泥固化砂柱，并对试样进行试验对比。结果表明：碳酸钙含量为7.1%、10.4%的MICP固化砂柱试样的无侧限抗压强度为对应水泥含量7.14%、10%的水泥固化砂柱试样的221%和117%，劈裂抗拉强度为对应水泥固化砂柱试样的609%和228%，即当碳酸钙与水泥含量相近时，MICP固化砂柱试样的无侧限抗压强度、劈裂抗拉强度要高于水泥固化砂柱试样。
- 碳酸钙沉积 /
- 微生物固化砂柱 /
- 水泥固化砂柱 /
- 强度
Abstract: MICP is a research hotspot in soil improvement in recent years. However, the mechanical properties of sand cemented by MICP and conventional improvement with cement have not been sufficiently compared. To further clarify the mechanical properties of sand columns cemented by MICP and sand columns cemented with cement, sand columns comented by MICP or with cement were made, and the tests of unconfined compressive strength and splitting-tensile strength were performed. The test results showed that: the unconfined strength values of sand columns cemented by MICP with calcium carbonate contents of 7.1% and 10.4% were 221% and 117% of that cemented with cement of contents 7.14% and 10%, its splitting tensile strength were 609% and 228% of that cemented with cement. In a word, when the calcium carbonate content was as similar as the cement content, the unconfined compressive strength and splitting-tensile strength of sand columns cemented by MICP were higher than those of cement mortar.
- microbially induced carbonate precipitation /
- sand column cemented by MICP /
- sand column camented with cement /
- strength

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