Transport law and control system of wind-blown sand along the desert highway of South Xinjiang Tazhong-38th Corp

Subjects: Geosciences >> Geology submitted time 2022-12-20 Cooperative journals: 《干旱区研究》

马奔腾 程建军 雷加强 丁泊淞 高丽 安元锋 郑智鹏

Abstract：

The Tazhong-38th Corp Desert Highway, currently under construction, extends from the hinterland of Taklamakan Desert to its southeastern edge. Different degrees of wind and sand hazards are distributed along the whole route, posing serious threats to the construction, service, and maintenance of the desert highway. Based on remote sensing image interpretation and wind data analysis, the wind and sand environment characteristics and dune movement rules in different sections of the desert highway were assessed, and a corresponding sand hazard prevention system framework is proposed. Our analysis showed that the prevailing wind directions along the desert highway are NE, ENE, and E, and the frequency of sandy wind increases from 21.7% to 33.8%. The wind direction characteristic develops from sharp bimodal to blunt bimodal, and the wind and sand hazards gradually become more severe: the drift potential along the section ranges from 178.23 to 309.43 VU, the wind energy environment is low to medium, the resultant drift direction is between SW-WSW, and the wind direction variation rate is medium. The annual average dune movement speed is between 3.16 and 6.26 m.a-1 , and there are obvious spatial differences in dune movement speed and direction. The consistency between dune movement direction and the resultant drift direction is poor in some sections. Based on the above environmental characteristics of the desert highway sections, a sand control system for the desert highway, combining blocking and solidification, is proposed. The results of our study have practical application value in the development of prevention and mitigation measures for desert highway sand damage.

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304不锈钢在淡化海水中的点蚀行为

Subjects: Materials Science >> Materials Science (General) Subjects: Geosciences >> Marine Sciences submitted time 2017-03-31 Cooperative journals: 《腐蚀科学与防护技术》

高丽飞 杜敏

Abstract：运用开路电位、交流阻抗、阳极极化曲线和电化学频率调制技术研究了304不锈钢在不同温度（60~90℃）及不同海水（一级反渗透淡化海水、天然海水、1.6倍浓缩海水）中的点蚀行为。结果表明，304不锈钢在一级反渗透淡化海水中随着温度的升高点蚀敏感性增加；在发生点蚀前的钝化状态下，304不锈钢在一级反渗透淡化海水中比在海水中腐蚀严重；304不锈钢的点蚀敏感性随Cl-浓度的升高而增加；304不锈钢在80℃下的一级反渗透淡化海水中随浸泡时间的延长，腐蚀速率逐渐增大，且在浸泡1d时即有发生点蚀的倾向，在第10d时已经发生了点蚀。

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