马屹松,兰雯竣,赵杰. 不同截面型式的核电取水隧洞抗震分析及优化设计[J]. 华北地震科学,2021, 39(1):23-31, 41. doi:10. 3969/j.issn.1003−1375.2021.01.004.
引用本文: 马屹松,兰雯竣,赵杰. 不同截面型式的核电取水隧洞抗震分析及优化设计[J]. 华北地震科学,2021, 39(1):23-31, 41. doi:10. 3969/j.issn.1003−1375.2021.01.004.
MA Yisong,LAN Wenjun,ZHAO Jie. Anti-seismic Analysis and Optimization Design of Nuclear Power Water Intake Tunnel with Different Section Types[J]. North China Earthquake Sciences,2021, 39(1):23-31, 41. doi:10.3969/j.issn.1003−1375.2021.01.004.
Citation: MA Yisong,LAN Wenjun,ZHAO Jie. Anti-seismic Analysis and Optimization Design of Nuclear Power Water Intake Tunnel with Different Section Types[J]. North China Earthquake Sciences,2021, 39(1):23-31, 41. doi:10.3969/j.issn.1003−1375.2021.01.004.

不同截面型式的核电取水隧洞抗震分析及优化设计

Anti-seismic Analysis and Optimization Design of Nuclear Power Water Intake Tunnel with Different Section Types

  • 摘要: 结合巴基斯坦某核电工程,将3种隧洞断面型式运用到巴基斯坦卡拉奇核电取水隧洞模型中,采用时程分析方法,对两种不同的工况并考虑隧洞内水压力及支护作用,运用有限差分软件实现了地震响应计算,并利用计算结果对截面进行优化设计。结果表明:圆形截面型式在两种工况下弯矩和剪力值均小于其余两种截面型式;三者内力分布规律基本相似,部分区域数值变化较大,但圆形截面内力分布最均匀,受力最充分;通过三种截面型式的优化比较,圆形断面型式在满足抗震要求的情况下造价最低,但圆形隧洞水流量比马蹄形和城门洞形小,且在开挖过程中较马蹄形困难,应根据实际地质情况考虑圆形与马蹄形两种截面型式。通过对3种截面型式的内力及变形的全面分析,成果可为类似隧洞抗震设计提供参考。

     

    Abstract: Combined with a nuclear power project in Pakistan, three types of tunnel sections are applied to the water intake tunnel model of Karachi nuclear power plant in Pakistan. The seismic response calculation is realized by using time history analysis method and finite difference software, and the section is optimized by using the calculation results. In the calculation, two different working conditions are used, considering the water pressure and supporting effect in the tunnel. Through the comprehensive analysis of the internal force and deformation of the three types of sections, the guidance is provided for the seismic design of similar projects. The results show that the bending moment and shear force of circular section are smaller than those of the other two sections. The internal force distribution of the three is basically similar, and the numerical value of some areas changes greatly, but the internal force distribution of the circular section is the most uniform and the stress is the most sufficient. Through the optimization and comparison of the three cross-section forms, the circular cross-section form has the lowest cost under the condition of meeting the seismic requirements, but the water flow of the circular tunnel is smaller than that of the horseshoe and the gate tunnel, and it is more difficult in the excavation process than that of the horseshoe. According to the actual geological conditions, two types of cross-section, i.e. circular section and horseshoe section, should be considered. The research results of this paper may provide reference for similar tunnel seismic design.

     

/

返回文章
返回