采用微生物技术复合改良膨胀土的工程特性试验研究

肖建章; 刘禹杉; 王迪; 李健; 吴帅峰; 王波

doi:10.11779/CJGE2023S10047

采用微生物技术复合改良膨胀土的工程特性试验研究 English Version

1.
中国水利水电科学研究院流域水循环模拟与调控国家重点实验室, 北京 100048
2.
翁牛特旗海拉苏水利工程管护中心, 内蒙古赤峰 024500

基金项目:

国家重点研发计划课题 2019YFC1509800

引江济淮公司科研项目 YJJH-ZT-ZX-20221130515

详细信息

作者简介:
肖建章(1977—)，男，博士，主要从事岩土工程材料力学性质方面的试验研究工作。E-mail：xiaojz@iwhr.com

中图分类号: TU43
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出版历程
- 收稿日期: 2023-07-05
- 网络出版日期: 2023-11-23
- 刊出日期: 2023-10-31

Experimental study on engineering characteristics of composite improvement of expansive soil by using microbial technology

1.
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
2.
Hai Lasu Water Conservancy Engineering Management and Protection Center of Weng Niute, Chifeng 024500, China

摘要

摘要: 膨胀土是岩土工程界的公认难题之一，基于微生物技术，结合石灰、水泥、粉煤灰等改良材料，系统开展了复合改良膨胀土的工程特性试验研究。结果表明：①微生物复合改良膨胀土成功的将弱膨胀土变为无膨胀土，自由膨胀率最低降低至8%，降幅达84.31%，工程效果良好。②经复合处理试样中的蒙脱石相对含量降低、伊利石相对含量上升是抑制胀缩特性的一个重要原因。③膨胀土中单掺菌液20%情况下，摩擦角同比可增加23%。④菌液、粉煤灰、石灰复合改良膨胀土情况下，石灰掺比1%粉煤灰2%的低掺比组合对提高强度更为有利。
- 膨胀土 /
- 微生物 /
- 复合改良 /
- 胀缩特性
Abstract: The expansive soil is one of the recognized challenges in the field of geotechnical engineering. Based on the microbial technology, combined with the improved materials such as lime, cement and fly ash, the experimental researches on the engineering characteristics of composite improved expansive soil are conducted. The results show that: (1) The weak expansive soil is successfully changed into the non-expansive one by the microbial composite improvement of expansive soil, and the free expansion rate is reduced to 8% at the lowest, with a decrease of 84.31%. The engineering effect is good. (2) The decrease of the relative content of montmorillonite and the increase of the relative content of illite in the composite treated samples are the important reason for inhibiting the expansion and contraction characteristics. (3) When the bacterial solution of 20% is added to the expansive soil, the friction angle can increase by 23% compared to that at the same time last year. (4) In the case of composite improvement of expansive soil with bacterial solution, fly ash and lime, a low ratio combination of lime of 1% and fly ash of 2% is more advantageous for improving the strength.
- expansive soil /
- microorganism /
- compsite improvement /
- engineering characteristic

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图 1 菌液、粉煤灰+膨胀土改良前后自由膨胀率降幅对比

Figure 1. Comparison of the decrease in free expansion rate before and after improvement with bacterial solution, fly ash, and expansive soil

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图 2 菌液、石灰+膨胀土改良前后自由膨胀率降幅对比

Figure 2. Comparison of the decrease in free expansion rate before and after improvement with bacterial solution, lime, and expansive soil

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图 3 E组改良前后自由膨胀率降幅对比

Figure 3. Comparison of the decrease in free expansion rate before and after improvement in Group E

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图 4 F组改良前后自由膨胀率降幅对比

Figure 4. Comparison of the decrease in free expansion rate before and after improvement in Group F

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图 5 膨胀土改良前后各组伊蒙混层相对含量对比

Figure 5. Comparison of relative content of each group of Yimeng mixed layer before and after improvement of expansive soil

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表 1 复合改良处理对膨胀土固化强度影响试验设计

Table 1 Experimental design for the effect of composite improvement treatment on the solidification strength of expansive soil

试验组别	含水率或掺比	试验编号
A	水+膨胀土、含水率10%	A10
	水+膨胀土、含水率15%	A15
	水+膨胀土、含水率20%	A20
	水+膨胀土、含水率25%	A25
B	菌液+膨胀土、含水率10%	B10
	菌液+膨胀土、含水率15%	B15
	菌液+膨胀土、含水率20%	B20
	菌液+膨胀土、含水率25%	B25
C	菌液20%、粉煤灰掺比3%	C3
	菌液20%、粉煤灰掺比6%	C6
	菌液20%、粉煤灰掺比9%	C9
D	菌液20%、石灰掺比3%	D3
	菌液20%、石灰掺比6%	D6
	菌液20%、石灰掺比9%	D9
E	菌液20%、石灰1%、粉煤灰2%	E3
	菌液20%、石灰2%、粉煤灰4%	E6
	菌液20%、石灰3%、粉煤灰6%	E9
F	菌液20%、粉煤灰1%、石灰1%、水泥1%	F3
F	菌液20%、粉煤灰2%、石灰2%、水泥2%	F6

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表 2 水+膨胀土不同含水率抗剪强度指标

Table 2 Shear strength indicators of water + expansive soil with different moisture contents

组别	c/kPa	φ/(°)
A10	12.96	29.9
A15	46.87	29.5
A20	55.04	23.4
A25	59.34	21.0

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表 3 菌液+膨胀土不同含水率抗剪强度指标

Table 3 Shear strength indicators of bacterial solution + expansive soil with different moisture contents

组别	c/kPa	φ/(°)
B10	8.44	31.2
B15	5.33	32.4
B20	39.37	28.9
B25	47.87	17.5

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表 4 菌液、粉煤灰+膨胀土抗剪强度指标

Table 4 Shear strength indicators of bacterial solution, fly ash + expansive soil

组别	c/kPa	φ/(°)
C3	35.44	24.2
C6	12.96	29.7
C9	23.2	25.3

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表 5 菌液、石灰+膨胀土抗剪强度指标

Table 5 Shear strength indicators of bacterial solution, lime + expansive soil

组别	c/kPa	φ/(°)
D3	6.02	29.4
D6	26.66	32.5
D9	34.53	26.1

下载: 导出CSV

表 6 菌液、粉煤灰、石灰+膨胀土抗剪强度指标

Table 6 Shear strength indicators of bacterial solution, fly ash + expansive soil

组别	c/kPa	φ/(°)
E3	18.93	34.9
E6	19.38	27.2
E9	21.49	21.49

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表 7 菌液、粉煤灰、石灰、水泥+膨胀土抗剪强度指标

Table 7 Shear strength indicators of bacterial solution, fly ash + expansive soil

组别	c/kPa	φ/(°)
F3	20.81	24.3
F6	28.97	30.6
F9	31.93	26.9

下载: 导出CSV

参考文献(10)

[1]	廖世文. 膨胀土与铁路工程[M]. 北京: 中国铁道出版社, 1984. LIAO Shiwen. Expansive Soil and Railway Engineering[M]. Beijing: China Railway Publishing House, 1984. (in Chinese)
[2]	刘清秉, 项伟, 吴云刚. 膨胀土工程特性及改性理论研究[M]. 武汉: 中国地质大学出版社, 2015. LIU Qingbing, XIANG Wei, WU Yungang. Study on Engineering Characteristics and Modification Theory of Expansive Soil[M]. Wuhan: China University of Geosciences Press, 2015. (in Chinese)
[3]	谢长征. 膨胀土路基填料石灰改良机理研究[D]. 武汉: 湖北工业大学, 2017. XIE Changzheng. Study on Lime Improvement Mechanism of Expansive Soil Subgrade Filler[D]. Wuhan: Hubei University of Technology, 2017. (in Chinese)
[4]	CHEW S H, KAMRUZZAMAN A H M, LEE F H. Physicochemical and engineering behavior of cement treated clays[J]. J Geotech Geoenviron, 2004, 130(7): 696-706. doi: 10.1061/(ASCE)1090-0241(2004)130:7(696)
[5]	ZHAO H H, GE L, PETRY T M, et al. Effects of chemical stabilizers on an expansive clay[J]. KSCE Journal of Civil Engineering, 2014, 18(4): 1009-1017. doi: 10.1007/s12205-013-1014-5
[6]	阎葆瑞, 张锡根. 微生物成矿学[M]. 北京: 科学出版社, 2000. YAN Baorui, ZHANG Xigen. Microbial Metallogeny[M]. Beijing: Science Press, 2000. (in Chinese)
[7]	MARTINEZ B C, DEJONG J T, GINN T R, et al. Experimental optimization of microbial-induced carbonate precipitation for soil improvement[J]. Journal of Geotechnical and Geoenvironmental Engineering(ASCE), 2013, 139(4): 587-598. doi: 10.1061/(ASCE)GT.1943-5606.0000787
[8]	MUJAH D, SHAHIN M A, CHENG L. State-of-the-art review of biocementation by microbially induced calcite precipitation (micp) for soil stabilization[J]. Geomicrobiology, 2017, 34(6): 524-537. doi: 10.1080/01490451.2016.1225866
[9]	XIAO J Z, WEI Y Q, CAI H, et al. Microbial-induced carbonate precipitation for strengthening soft clay[J]. Advances in Materials Science and Engineering, 2020: 8140724.
[10]	WEI R, XIAO J Z, WU S F, et al. Effectiveness of microbially induced calcite precipitation for treating expansive soils[J]. Advances in Civil Engineering Materials, 2021, 10(1): 350-361.

施引文献(6)

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