高级检索

      地震与大坝安全刍议

      Discussions on earthquakes and dam safety

      • 摘要: 为研究地震区水库大坝的抗震安全,从天然构造地震和水库触发地震两方面论述了地震与大坝安全的关系,并结合国际大坝委员会相关技术公报内容,介绍了国际坝工界的大坝工程抗震安全设防标准。分析表明: 地壳运动所形成的构造型地震是大坝安全风险的主要来源,有可能造成大坝和库区震损的水库地震通常也属于构造型地震。水库蓄水直接诱发的地震大多具有震源浅、震级低的特点,尽管部分与库区地质构造相关的水库触发地震其震级不可能超过构造地震本身的震级,但由于其震中紧邻重要水工建筑物、震中烈度高,故其对工程和周边库区仍具有较大破坏性,需深入研究。对比国内外的大坝抗震设防标准,中国的现行技术体系已基本实现了与国际标准的对接。在合理确定大坝抗震设防标准的前提下,通过科学的结构设计和严格的施工质量控制,并辅之以有效的应急管理措施,可以有效地保证大坝工程的抗震安全。

         

        Abstract: In order to study the seismic safety of reservoir DAMS in earthquake-prone areas, from the aspects of natural tectonic earthquakes and reservoir triggered earthquakes, the relationship between earthquakes and dam safety was discussed. The seismic safety standards for dam engineering of international dam engineering community were introduced. Analysis shows that tectonic earthquakes formed by crustal movement are the main source of safety risks for dams. Reservoir earthquakes that may cause damage to dam and reservoir areas are usually has tectonic background. Most earthquakes directly induced by reservoir impoundment have the characteristics of shallow focus and low magnitudes. Reservoir triggered earthquake related to the tectonic structure of the reservoir area, although its magnitudes cannot exceed the earthquake caused the tectonic structure itself, it may still have significant destructive effects on the project and the surrounding area due to its proximity to important hydraulic structures and high intensity at the epicenter. Therefore, in-depth studies are needed. By comparing the seismic standards for dams at home and abroad, current technical system of seismic safety standard for dams in China has basically achieved equivalent alignment with the international standards. Under the premise of reasonably determining the seismic standards of the dam, through reasonable structural design and strict construction quality control, supplemented by effective emergency management, the seismic safety of the dam project can be effectively guaranteed.

         

      /

      返回文章
      返回