This paper examines biocementation via the microbial-induced carbonate precipitation (MICP) process as an appropriate and promising new technology for stabilisation of loose sand and silty sand deposits as a method to mitigate wind erosion. The technique involves spray treating the sand surface layer with a mixture of cementation and bacterial-cell solutions, the ensuing reactions causing calcite precipitation to occur between the sand grains, thereby lightly cementing them together over time. The bench-scale experimental programme presented investigates the proposed technique’s effectiveness for stabilisation of silica and carbonate sands with different gradations, determination of the optimal reagent concentrations, the time-dependent shear strength development for the crustal sand layer following single- and double-MICP spray treatments, as well as wind tunnel experiments. Of particular novelty were investigations of the effect of dew formation on crustal shear strength development with curing period and the efficiency of the MICP treatment for the outdoor environment compared to laboratory-controlled test conditions. The wind tunnel experiments demonstrated that 28-day cured singly MICP-spray-treated crustal sand layers were stable to simulated 20 m·s⁻¹ winds measured at 20 cm above the layer surface.

本文研究了通过微生物诱导的碳酸盐沉淀（MICP）过程进行的生物胶结，作为一种合适的且有希望的新技术，该技术可以稳定散砂和粉质砂沉积物，从而减轻风蚀。该技术涉及用胶结和细菌细胞溶液的混合物对砂表层进行喷涂处理，随后发生的反应导致方解石沉淀在砂粒之间发生，从而随着时间的推移将它们轻轻地胶结在一起。提出的实验规模实验程序研究了所建议的技术对不同等级的二氧化硅和碳酸盐砂稳定化的有效性，确定最佳试剂浓度，单次和两次MICP喷涂后地壳砂层随时间变化的剪切强度的发展治疗，以及风洞实验 与实验室控制的测试条件相比，研究结露对固化时间形成的地壳剪切强度发展的影响以及户外环境下MICP处理效率的研究尤其新颖。风洞实验表明，经MICP喷雾处理的28天单独固化的地壳砂层对模拟20 m·s稳定在层表面上方20厘米处测量到^-1风。