南水北调中线渠道工程关键技术研究

Research on key technologies of canal project of Middle Route Project of South-to-North Water Diversion

针对南水北调中线渠道工程中膨胀土渠道、大型渡槽设计难题,开展技术攻关,取得了系列创新成果。在强降水区深挖高填膨胀土渠道方面,开展了多裂隙膨胀土边坡综合抗剪强度取值方法、原生裂隙面控制的深层滑动稳定分析方法、坡面保护与坡体加固的新型结构及其控制标准、填方渠堤剩余沉降量预测与控制方法、水泥改性土等关键技术研究,形成了膨胀土边坡设计理论方法和标准体系。在超大型渡槽结构设计方面,开展了低耗水头新型渡槽型式、温度荷载模式、预应力设计方法等研究,发展了超大型渡槽设计理论方法、设计控制标准。南水北调中线工程渠道关键技术的研发,解决了渠道工程设计技术难题,缩短了关键工期,保证了工程顺利建设和按期通水,取得了显著的经济、社会和生态效益。

Aiming at the technical issues in the design of expansive soil canal and large aqueduct in the Middle Route Project of South-to-North Water Diversion,the intensive research was conducted and a series of innovative achievements were obtained. In the light of deep excavated and high-filled expansive soil canal,some key technologies were studied,such as the determination method of comprehensive shear strength of multi-fractural expansive soil slope,the stability analysis method of deep sliding controlled by original fracture surface,the new structure and control standard of slope surface protection and slope body reinforcement,the prediction and control method of residual settlement of filled canal embankment,the cement modified soil and etc. On the basis of research achievements,the theoretical design method and standard system of expansive soil slope were formulated. In the structural design of super large aqueduct,the new type of aqueduct with small hydraulic head loss,temperature loading mode,prestress design method etc. were studied,which promoted the progress of the design theory,method and control standard of super large aqueduct. Due to the research on the key technologies of canal project of the Middle Route Project of South-to-North Water Diversion,the technical issues in the design of large aqueduct were solved,which shortened the construction period and ensured the project completion on schedule with significant social and economical benefits.