甘肃省淤地坝地震损坏调查及应对措施

Earthquake damage investigations of silt dams and corresponding measures in Gansu Province

"5·12"汶川地震发生后,因地震诱发的次生灾害严重威胁人民生命和财产安全。为了解淤地坝因震受损情况,做好淤地坝工程安全度汛,避免震灾次生灾害发生,笔者作为水利部调查组成员赴甘肃现场调查。通过淤地坝震损程度调查和震损风险评估,将地震损坏的淤地坝分为"高危""危险""一般危险"和"轻微危险"4类,分析了造成淤地坝损坏的主要原因和间接因素。针对淤地坝不同的损坏类型,提出了裂缝、渗漏和岸坡坍塌处理等相应治理措施。

Wenchuan Earthquake on May 12th, 2008 brought not only tremendous losses of people＇s lives and fortunes, but also induced lots of sub-disasters threatening human＇s lives and treasures. Gansu Province was the second worst damaged province followed Sichuan Province. In Gansu province, the silt dams had different degrees of damages. In order to find dangerous cases as soon as possible, ensure the safety of silt dams during flood season and avoid the occurrence of sub-disasters caused by earthquake, the authors as members of investigation group arranged by Ministry of Water Resources classified 4 levels of silt dams according to the degree of earthquake damages which were the most dangerous, the less-most dangerous, dangerous and the less dangerous, and analyzed the main reasons and indirect factors caused the damages of silt dams, by through field investigations and risk evaluations of damaged silt dams. Besid dams, the corresponding measures were proposed for instance crack es, based on different damaged types of silt treatment, leakage prevention and collapse disposal.