On-site test of fixed mobile sand dunes using combined technology of sand plants and EICP in the Ulanbuh Desert, China

IF 5.6 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-01-06 DOI:10.1007/s11440-024-02524-4

Chi Li, Shuanhu Li, Jiawei Xing, Yu Gao, De Yao

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引用次数: 0

Abstract

Mobile sand dunes have been recognized as quite tricky natural disaster in Central and Western China. Consequently, proposing an effective and environmentally friendly method to combat mobile sand dunes is of great significance. In this study, a combined technology, enzyme-induced carbonate precipitation (EICP) and sand plants, is proposed to control the mobile sand dunes. Laboratory experiments and large-scale on-site tests were conducted to demonstrate the feasibility of this combined technology to improve the success rate for treating mobile sand dunes. The results showed that using a first spray solution before germination with concentrations of 0.05 mol/L (calcium source solution) and 10 g/L (urease solution), the sand plants (Alfalfa, Astragalus, and Sarcozygium) had an optimal germination rate. For the second spray solution after germination, it is recommended to employ a solution comprising 0.05 mol/L, 40 g/L at an application amount of 4 L/m² (spray amount), using a one-phase injection method to improve the spray efficiency, which had the highest strength, the best water retention, and the best erosion resistance. Therefore, wind erosion resistance during on-site test was significantly improved, and the desert sands in the Ulanbuh Desert were not affected by wind for 60 days or more. The results demonstrated that combined technology was effective in preventing mobile sand dune movement, which presents promising potential for wide application in desert area.

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乌兰布赫沙漠沙厂与EICP联合技术固定移动沙丘现场试验

移动沙丘是中国中西部地区较为棘手的自然灾害。因此，提出一种有效、环保的防治流动沙丘的方法具有重要意义。本研究提出了酶促碳酸盐降水（EICP）与沙植物相结合的技术来控制流动沙丘。通过室内试验和大型现场试验，验证了该组合技术提高流动沙丘治理成功率的可行性。结果表明，在萌发前使用浓度为0.05 mol/L（钙源溶液）和10 g/L（脲酶溶液）的第一次喷雾溶液，紫花苜蓿、黄芪和沙菌的发芽率最佳。萌发后的第二次喷雾溶液，建议采用0.05 mol/L、40 g/L的溶液，施用量为4 L/m2（喷雾量），采用单相注射的方法提高喷雾效率，具有最高的强度、最佳的保水性和最佳的抗侵蚀性。因此，现场试验时的抗风蚀性明显提高，乌兰布赫沙漠的沙土在60天以上不受风的影响。结果表明，复合技术对沙丘移动的防治效果较好，在荒漠地区具有广阔的应用前景。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.