低温条件下微生物诱导碳酸钙沉积加固土体的试验研究

彭劼; 何想; 刘志明; 冯清鹏; 何稼

doi:10.11779/CJGE201610004

低温条件下微生物诱导碳酸钙沉积加固土体的试验研究 English Version

彭劼^1,2,
何想^1,2,
刘志明^1,2,
冯清鹏^1,2,
何稼^1,2

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098；
2. 江苏省岩土工程技术工程研究中心（河海大学）,江苏南京 210098

基金项目: 国家自然科学基金项目（51578214）; 岩土力学与堤坝工程教育部重点实验室开放基金项目（GH201304）

详细信息

作者简介:
彭劼(1971- ),男,湖南衡阳人,教授,硕士生导师,主要从事软基处理相关研究。E-mail: peng-jie@hhu.edu.cn。

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- 文章访问数: 765
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出版历程
- 收稿日期: 2015-09-14
- 发布日期: 2016-10-24

Experimental research on influence of low temperature on MICP-treated soil

PENG Jie^1,2,
HE Xiang^1,2,
LIU Zhi-ming^1,2,
FENG Qing-peng^1,2,
HE Jia^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

摘要

摘要: 微生物诱导碳酸钙沉积（MICP）加固土体是近年来受到学术界重视的问题,但是对实际土壤温度下MICP加固土体的可行性及效果研究未见报道。利用尿素水解菌ATCC 11859,进行了微生物诱导碳酸钙沉积的试管试验及一维砂柱试验,研究了不同温度下微生物诱导生成碳酸钙的特性及对土体的加固效果。试管试验表明温度越高生成的碳酸钙越多,在不同温度下微生物诱导生成的碳酸钙晶型无显著差异,但是温度对碳酸钙的生成速率有明显影响。一维加固试验表明MICP在一般土壤温度条件下都能够有效地加固土体,但低温下MICP加固的试样强度较低,渗透系数较高。
- 微生物诱导碳酸钙沉积 /
- 温度 /
- 土体加固 /
- 试验研究
Abstract: The microbially induced carbonate precipitation (MICP) has become an active issue in the field of geotechnical engineering. However, the feasibility and reinforcement effects of this technology at low temperature are not available in previous literatures. A series of tube tests and one-dimesion sand column trials using ureolytic bacteria ATCC11859 are conducted to investigate the influence of ambient temperature on MICP behavior and stabiliszaion effectiveness. The tube test results show that the final amount of calcium carbonate is much more in high temperature than lower temperature, and the temperature has a notable influence on the formation rate of precipitations instead of the morphology of CaCO₃ in aqueous medium. The experiments on coarse sand treated with surface percolation demonstrate the validity of bio-grout at common soil temperature, whereas the MICP-treated sand column has a relatively lower UCS as well as higher permeability coefficient at low temperature.
- microbially induced carbonate precipitation /
- temperature /
- soil improvement /
- experimental research

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参考文献(19)

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低温条件下微生物诱导碳酸钙沉积加固土体的试验研究 English Version

作者简介: 彭劼(1971- ),男,湖南衡阳人,教授,硕士生导师,主要从事软基处理相关研究。E-mail: peng-jie@hhu.edu.cn。

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出版历程

Experimental research on influence of low temperature on MICP-treated soil

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出版历程

目录

作者简介:
彭劼(1971- ),男,湖南衡阳人,教授,硕士生导师,主要从事软基处理相关研究。E-mail: peng-jie@hhu.edu.cn。