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- Title
MICP 技术与超旱生植物联合治理流沙试验研究.
- Authors
赵志杰; 李 驰; 高 瑜; 张振国; 张永锋
- Abstract
In order to explore the feasibility of combining MICP technology with super-xerophyte for wind prevention and sand fixation, MICP technology was used to treat the quicksand, and three super-xerophytes, including Zygophyllum xanthoxylum, Cleistogenes songorica and Ar-temisia sphaerocephala, were selected for indoor pot experiment. The effects of the concentration of bacteria and cementing fluid on the plant emergence rate were studied. The wind erosion test of MICP-treated specimens was carried out by indoor wind erosion system, and the wind erosion resistance of bio-mineralized crust specimens was studied. The results show that MICP technology combined with super-xerophyte for windbreak and sand fixation is technically feasible. The optimal OD600 value of microbial induced calcium carbonate precipitation is 0.8, and the concentration of cement solution is 0.10 moVL. After the treatment of quicksand, the formation of mineralization and the emergence rate of xerophytes are the best. The order of emergence rate of three kinds of super-xerophytes is Artemisia sphaerocephala > Zygophyllum xan-thoxylum > Cleistogenes songorica. The bio-mineralized crust has good wind erosion resistance. After the specimens treated with the mixture of bacterial solution and cementing solution at the spraying rate of 0.5-0.7 mL/cm² are blown at 12 m/s wind speed for 10 min, the mass loss rate is 50-64 percentage points lower than that of the control specimen. The specimen with the spraying rate of 0.7 mL/cm² has the best wind erosion resistance.
- Publication
Yellow River, 2022, Vol 44, Issue 8, p119
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2022.08.023