中文摘要：

基于750kV兰州东-银川东输电线路工程的工程勘察，考虑宁夏地区湿陷性黄土的区域分布特点，分段对输电线路沿线宁夏境内90km湿陷性黄土的主要物理特性与湿陷性进行对比分析和总结，评价了沿线黄土的湿陷等级及界限，同时对沿线地下水及黄土的化学矿物进行分析。分析结果表明：该地区黄土的湿陷性与分布区域、埋深、颗粒组成、天然孔隙比、干容重等物理性质和黄土的化学矿物组成存在必然的联系。试验结果可以为该工程的设计施工提供依据，也为今后该地区施工建设提供参考数据。

英文摘要：

Based on the geological investigation, a comparison analysis is made of the loess along the 90 km-long 750 kV Transmission lines from eastern Lanzhou in Gansu Province to eastern Yinchuan in Ningxia Province, in terms of physical properties, collapsibility, the chemical and mineralogical compositions. The collapsible class and limit of the loess and the ground water along the line were also determined. The analytical results indicate that the collapsibility of loess is closely related to its location, depth, grain composition, natural void ratio, dry unit weight, and chemical and mineralogical compositions. The test results can be used not only as a basis for design and construction of this project, but also as a reference for other project in this area.