Li, Gang , Deng, Haoyang , Liu, Jia , Yang, Xuemin
2026-07-03 GEOMICROBIOLOGY JOURNAL 2026 43(卷), 6(期), (783-800页)
Eolian sand will cause friction and erosion to the land surface when subject to wind force, which has an adverse effect on transportation, agriculture and atmospheric environment. In this paper, microbially induced calcite precipitation (MICP) and basalt fiber reinforcement (BFR) methods were used to stabilize the eolian sand. To evaluate the wind erosion resistance of eolian sand, the wind-tunnel model tests were conducted to investigate the effects of wind velocity, erosion angle and erosion time on the threshold friction velocity, cumulative mass loss, wind erosion modulus, cemented thickness and surface morphology. Based on the test results, an erosion modulus model considering the wind velocity and erosion angle was constructed. The test results indicated that the threshold friction velocity of eolian sand decreased with increasing of wind erosion angle, whereas the cumulative mass loss increased with increasing of wind velocity and wind erosion angle. Under the maximum wind velocity and erosion angle, the mass loss of MICP-BFR treated sand was reduced by 90.06% compared with that of loose sand. Wind erosion modulus followed the order of loose sand > MICP treated sand > MICP-BFR treated sand. The cemented thickness of MICP treated sand exhibited uniform distribution, whereas that of MICP-BFR treated sand presented relatively uniform with an average thickness of 2 cm. The model prediction results coincided with the measurement results, indicating that the model is applicable to predict the erosion modulus of eolian sand. The research results can provide a reference for wind prevention and sand solidification in desert areas.