微生物灌浆对广东花岗岩残积土强度影响的试验研究

毛强; 呙锴; 杜鉴航; 肖广宁; 张江伟; 郭红仙; 程晓辉

doi:10.3724/j.gyjzG23082602

微生物灌浆对广东花岗岩残积土强度影响的试验研究

doi: 10.3724/j.gyjzG23082602

1. 中国南方电网超高压输电公司电力科研院, 广州 510700;
2. 清华大学土木工程系, 北京 100084;
3. 河北地质大学, 石家庄 050031

详细信息

作者简介:
毛强,男,硕士,高级工程师,主要从事超特高压交直流线路规划研究工作,maoqehv@163.com。

通讯作者:
呙锴,工程师,主要从事电网规划研究工作,guokai98@foxmail.com。

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出版历程
- 收稿日期: 2023-08-26
- 网络出版日期: 2024-10-18

Experimental Research on Microbial Grouting Effect on Strength of Granite Residual Soil in Guangdong

1. CSG EHV Power Transmission Company, Guangzhou 510700, China;
2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;
3. Hebei GEO University, Shijiazhuang 050031, China

摘要

摘要: 针对广东花岗岩残积土地区输电塔处边坡在强降雨作用下易发生滑坡的问题,展开微生物诱导碳酸钙沉积技术(MICP)改善花岗岩残积土力学性能的研究。对取自肇庆和清远两地的花岗岩残积土(平均粒径d₅₀分别为0.179、1.547 mm)进行了MICP灌浆及力学性能试验测试。结果表明:两种花岗岩残积土都被成功胶结,两种土因粒径大小及组成不同,胶结效果也不同,单轴无侧限抗压强度分别达到2.74、3.36 MPa,三轴压缩试验结果表明黏聚力均显著提升。
- 微生物诱导碳酸钙沉积技术 /
- 花岗岩残积土 /
- 三轴压缩试验 /
- 微生物灌浆
Abstract: Be aimed at the issue that granite residual soil slopes are prone to landslide in heavy rainfall in Guangdong, the use of microbial induced calcium carbonate precipitation technique to improve the mechanical properties of granite residual soil was performed. The specimens of granite residual soil with a average particle diameter of 0.179 mm and 1.547 mm respectively, taken from Zhaoqing and Qingyuan in Guangdong, were grounted by MICP and tested their mechanisal properties before and after being grouted. The results showed that both types of granite residual soil had been successfully cemented, and the particle sizes and composition of soil influenced the cemented effect by MICP. Their uniaxial unconfined compressive strength reached 2.74 MPa and 3.36 MPa respectively. Triaxial compression tests were also conducted, and the test result indicated that the cohesion of specimens from both sites were improved.
- microbial induced calcium carbonate precipitation technique /
- granite residual soil /
- triaxial compression test /
- microbial grouting

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参考文献(11)

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