里运河堤防险工险段典型失效模式分析

里运河作为南水北调工程东线的输水主干线，其堤防的渗流与结构安全对确保南水北调东线工程运行调度与沿线公众生命财产安全具有重要意义。针对里运河堤防工程主要险工险段存在的渗流和结构安全问题，系统分析了影响工程安全的主要风险因子，提出了里运河堤防工程土堤、水闸和穿堤涵洞等建筑物的可能失效模式。结合工程勘察与安全检测成果，对里运河堤防主要险工险段的典型断面进行渗流和稳定计算，根据计算结果并结合堤防工程安全评价导则，确定里运河东堤渗流和稳定的安全性等级，对典型险工险段进行了综合安全评价，里运河东堤存在严重安全隐患，综合评价为三类堤。研究成果可为里运河堤防加固与监测设计工作提供依据。

Analysis of failure modes for typical dangerous sections of Li Canal levee

As the main water-conveyance line of the east route of the South-to-North Water Diversion Project, the seepage and structural safety of the Li Canal are of great significance to ensuring the operation of the east route of the South-to-North Water Diversion Project and the safety of the lives and property of the residents along the line. In view of the seepage and structural safety problems existing in the main dangerous sections of the Li Canal levee project, the main risk factors affecting the project safety are systematically analyzed, and the possible failure modes of the earth levee, sluices and culverts of the Li Canal levee project are put forward. Based on the results of the project investigation and safety inspection, the seepage and stability calculation of the typical dangerous sections of the Li Canal levee is carried out in this study. According to the guidelines for the levee safety evaluation, the safety grade of seepage and stability of the Li Canal east levee is determined, and the comprehensive safety evaluation for the typical dangerous sections is carried out. There are serious potential safety hazards in the Li Canal east levee, which is comprehensively evaluated as the third type of levees. The analysis with research results can provide a basis for reinforcement, monitoring and design of the Li Canal levee.