新疆南干渠基土的性状与评价

在新疆岩土工程中经常会遇到膨胀岩土和冻胀破坏问题。本文从理论分析和实践运用两方面,阐明了冻胀性土的冻胀机理、冻胀的主要影响因素、渠道衬砌冻胀破坏类型,提出了针对南干渠冻胀性土和膨胀岩土的有效的工程处理措施,特别是对渠道沿线广泛分布的第三纪白砂岩作为渠道填方料、渠基膨胀泥岩换填料的可行性进行了研究。通过大量专题试验,查明了粗砂岩、中粗砂岩、中细砂岩、细砂岩等各自的岩土特性,解决了这一工程技术难题,并取得了良好的经济效益。

Study on characteristic of base soil of the South Arterial Canal in Xinjiang

The engineering geologic problems of expansive soil and frost damage are often encountered in geotechnical engineering in Xinjiang.From aspects of practice and(theory,) the authors analyzed the frost upheaval mechanism of these kinds of soil,their main infection factors,and the destruction types of canal lining due to frost upheaval.The authors put forward some effective engineering treatment measures for the South Arterial Canal in Xinjiang.Especially,the authors studied the feasibility of replacing the expansive mudstone with the tertiary white sandstone,which is widely distributed in North Xinjiang,as the embankment material of the canal body and the canal base.At present,the research results have been applied in practice to solve some engineering technical difficulties and some favorable engineering benefits have been achieved.