Abstract: Based on field testing in the desert hinterland, combined with the numerical simulation of Fluent wind-sand two-phase flow, the sand resistance performances of comprehensive protection in the desert hinterland under strong wind environment are investigated. The transient wind speed and wind direction around the comprehensive protection facility are measured by two 3D ultrasonic anemometers on the highway in the desert hinterland, and the initial wind speed of the sand flow is provided for the numerical simulation boundary. Numerical models of a high vertical sand barrier, a grass grid sand barrier, and a roadbed are established by Fluent. Based on Euler two-fluid model and porous media theory, the sand movement around comprehensive protective facilities and subgrade is numerically simulated. The study found that on the leeward side of the high vertical sand barrier, the wind speed quickly decreases to the range of 0~3 m/s, and the large sand particles are mainly deposited on the windward side of the high vertical sand barrier. The wind speed near the ground by the grass-checkered sand barrier is further decreased. The grass square forms a stable concave surface to generate backflow, which can ensure that the sand surface does not sand itself in a strong wind environment, and can also make sand carried in the airflow accumulate around the groove of the grass square.

Key words: wind and sand flow, desert hinterland highway, strong wind environment, comprehensive protection, wind and sand resistance performance