沙牌拱坝经受了超强地震的考验
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摘要
沙牌拱坝高132m,是我国于上世纪末建设的世界最高碾压混凝土拱坝。拱坝抗震设防烈度为7度。5.12汶川大地震震中距离坝址约36公里,波及到坝址的影响烈度约9度,震时水库水位为正常蓄水位。震后检查,拱坝工程未发现明显的震损破坏,包括横缝和诱导缝均无明显张开迹象。本文在叙述拱坝设计与建设的基础上,就拱坝结构与基础的抗震安全作了初步复核分析,沙牌拱坝仍可继续发挥正常的挡水任务。
The Shaipai arch dam,132m high,is the highest RCC arch dam in the world by the end of 20th century,and its seismic fortification intensity is 7°.The construction site of this dam is about 36 km away from the epicenter of Wenchuan earthquake,and the local seismic intensity is 9°.When the earthquake was occurring,the Shaipai reservoir was at its normal storage level.The field inspection after the earthquake shows,that no obvious earthquake-caused damage to the dam,and that no significant indication of cracking at the transverse joints and induced joints of the dam has been found.This paper presents a preliminary rechecking analysis of the seismic safety of the dam structure and its abutment foundation.The results show that the Shapai arch dam retains its normal function of withstanding the design water load.
The Shaipai arch dam,132m high,is the highest RCC arch dam in the world by the end of 20th century,and its seismic fortification intensity is 7°.The construction site of this dam is about 36 km away from the epicenter of Wenchuan earthquake,and the local seismic intensity is 9°.When the earthquake was occurring,the Shaipai reservoir was at its normal storage level.The field inspection after the earthquake shows,that no obvious earthquake-caused damage to the dam,and that no significant indication of cracking at the transverse joints and induced joints of the dam has been found.This paper presents a preliminary rechecking analysis of the seismic safety of the dam structure and its abutment foundation.The results show that the Shapai arch dam retains its normal function of withstanding the design water load.
引文
[1]中国地震局.汶川8.0级地震烈度分布图[N/OL].2008-08-29.http://www.cea.gov.cn/manage/html/China Earthqueake Administration.Intensity distribution graph of Wenchuan M8.0 earthquake[N/OL].2008-08-29.(in Chinese)
[2]中国水电顾问集团成都勘测设计研究院.四川省岷江草坡河沙牌水电站碾压混凝土拱坝设计报告[R].成都,2003.Chengdu Hydroelectric Investigation and Design Institute,China Hydropower Engineering Consulting Group Co.Design reprot for RCC archdam of Shapai hydropower station at Caopo River in Minjiang River Basin of Sichuan province[R].Chengdu,2003.(in Chinese)
[2]中国水电顾问集团成都勘测设计研究院.四川省岷江草坡河沙牌水电站碾压混凝土拱坝设计报告[R].成都,2003.Chengdu Hydroelectric Investigation and Design Institute,China Hydropower Engineering Consulting Group Co.Design reprot for RCC archdam of Shapai hydropower station at Caopo River in Minjiang River Basin of Sichuan province[R].Chengdu,2003.(in Chinese)
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