民调工程风积沙渠基的压实工艺研究

Compaction Technology for Wind Deposited Sand Canal Foundation In the MingQing Oasis Water Diversion Project

景电二期延伸向民勤调水工程是为解决民勤绿洲水资源紧缺、改善绿洲生态环境的国家重点工程， 其中有６７ ｋｍ 渠线从腾格里沙漠的南缘通过。风积沙结构疏松、压实性能差， 为保证沙漠渠基的安全稳定， 风积沙的压实性质和工艺成为民勤调水工程设计施工中一项迫切需要解决的课题。作者在大量室内试验和现场压实试验的基础上， 对风积沙的压实特性进行了系统的研究，完善了沙漠渠基施工的压实工艺和质量控制办法，在民勤调水工程施工中得到了全面应用，取得了显著的社会效益和经济效益。

The second phase of Jingdian Project orientated to diverting water to Mingqing oasis in Gansu Province is a national key project to solve the problem of shortage of natural water resources there and to improve the oasis ecological environment.The 67 km canal line goes by the southern edge of Teng ge li desert.The wind deposited sand is loose in composition and poor in compaction performance.To ensure that the desert canal foundation be made stable,it is imperative to solve the problem of foundation compaction technology.Based on a great quantity of paboratory and ground soil tests,the paper systematically investigates the compaction characteristics of the sand and has perfected the compaction technology as well as quality control measures.Significant economic and social benefits have been obtained by applying the technology to this project.