基于安全系数的大型地下洞室衬砌优化研究
|
摘要
介绍了一种基于安全系数的大型地下洞室衬砌优化方法,应用于糯扎渡水电站调压井大型洞室的衬砌优化研究。首先,建立围岩和衬砌的三维有限元模型,施加初始地应力场,进行结构线弹性计算并配筋,其次,进行衬砌三维弹塑性计算,由围岩点安全系数比较分析,优化得到最佳衬砌方案,最后,对最佳衬砌方案合理性进行了验证分析。研究表明,当衬砌高程施作至625.5m时,围岩和衬砌稳定性较好,且围岩个别点安全裕度较小,因此衬砌方案Ⅳ为优化得到最佳衬砌方案;通过衬砌和围岩的稳定性分析验证了优化方法的合理性,可为其它类似工程衬砌优化研究提供借鉴。
A kind of lining optimization method of large-scale underground cavern based on safety factor is introduced,which is applied to lining optimization of the large-scale surge shaft cavern of Nuozhadu hydropower station.Firstly,the 3-D finite element models of surrounding rock and lining have been established,the initial stress field was applied to this model;a linear elastic calculation and reinforcing were carried out for the lining.Secondly,the 3-D elastic-plastic calculation of reinforced concrete was carried out,the best lining scheme was obtained by optimization through comparison of and analyzing the rock-point safety factor of surrounding rock.Finally,the calculation analysis for verifying the rationality of the best secondary lining scheme was carried out.The results show that the stability of surrounding rock and lining is well when the lining elevation approaching up to 625.5 m,and the safety factors margin of individual key points are less,therefore,the lining scheme Ⅳ is the best one.The rationality of the lining optimization method in this paper is verified by the stability analysis of lining and surrounding rock,which could provide reference to lining optimization study of other similar projects.
A kind of lining optimization method of large-scale underground cavern based on safety factor is introduced,which is applied to lining optimization of the large-scale surge shaft cavern of Nuozhadu hydropower station.Firstly,the 3-D finite element models of surrounding rock and lining have been established,the initial stress field was applied to this model;a linear elastic calculation and reinforcing were carried out for the lining.Secondly,the 3-D elastic-plastic calculation of reinforced concrete was carried out,the best lining scheme was obtained by optimization through comparison of and analyzing the rock-point safety factor of surrounding rock.Finally,the calculation analysis for verifying the rationality of the best secondary lining scheme was carried out.The results show that the stability of surrounding rock and lining is well when the lining elevation approaching up to 625.5 m,and the safety factors margin of individual key points are less,therefore,the lining scheme Ⅳ is the best one.The rationality of the lining optimization method in this paper is verified by the stability analysis of lining and surrounding rock,which could provide reference to lining optimization study of other similar projects.
引文
[1]叶超,肖明,杨亚玲.地震作用下大型多岔调压井衬砌结构数值分析[J].岩土力学,2008,29(增1):21-25.(Ye Chao,Xiao Ming,Yang Yaling.Numericalanalysis of large multifork surge-shaft lining structureunder seismic action[J].Rock and Soil Mechanics,2008,29(Supp.1):21-25.(in Chinese))
[2]谢心恒,吴冬梅.某水电站调压井衬砌应力稳定分析[J].水利水电工程设计,2009,28(3),11-13.(XieXinheng,Wu Dongmei.Stress and stability analysis ofsurge shaft lining of a hydroelectric power station[J].Design of Water Resources&Hydroelectric Engineer-ing,2009,28(3),11-13.(in Chinese))
[3]袁金亮,肖明,傅志浩,等.陡倾角岩体中阻抗式圆形调压井衬砌结构数值分析[J].岩石力学与工程学报,2004,23(8):1 296-1 300.(Yuan Jinliang,XiaoMing,Fu Zhihao,et al.Numerical analysis on liningstructure of restricted cylindrical surge chamber in rockmasses with steep obliquity[J].Chinese Journal ofRock Mechanics and Engineering,2004,23(8):1 296-1 300.(in Chinese))
[4]林鹏,周雅能,李子昌,等.官地地下尾水岔洞开挖与衬砌稳定研究[J].地下空间与工程学报,2010,6(2):283-289.(Lin Peng,Zhou Yaneng,Li Zichang,et al.Stability study on excavation and lining structureof Guandi tailrace bifurcation tunnel[J].Chinese Jour-nal of Underground Space and Engineering,2010,6(2):283-289.(in Chinese))
[5]黄生文,邓超荣,王晓明.大跨径隧道二次衬砌优化分析[J].中外公路,2010,30(1):201-204.(HuangShengwen,Deng Chaorong,Wang Xiaoming.Analysisof optimization of lining for the second time of large-spantunnel[J].Journal of China&Foreign Highway,2010,30(1):201-204.(in Chinese))
[6]张良,蒋文胜.金康水电站高压引水隧洞衬砌设计和优化探讨[J].四川水利发电,2007,26(6):17-20.(Zhang Liang,Jiang Wensheng.Design and optimiza-tion for high pressure headrace tunnel lining at Jinkanghydropower station[J].Sichuan Water Power,2007,26(6):17-20.(in Chinese))
[7]李效泉,闫红梅,张群波,等.水工隧洞衬砌结构作用的探讨[J].工程力学,2000(增),524-527.(Li Xi-aoquan,Yan Hongmei,Zhang Qunbo,et al.Study oneffect of hydraulic tunnel lining structure[J].Engi-neering Mechanics,2000,(Supp):524-527.(in Chi-nese))
[8]董哲仁.钢筋混凝土非线性有限元法原理与应用[M].北京:中国水利水电出版社,2002.(Dong Zher-en.Nonlinear finite element method of reinforced con-crete:theory and application[M].Beijing:China WaterPower Press,2002.(in Chinese))
[9]殷宗泽.土工原理[M].北京:中国水利水电出版社,2007.(Yin Zongze.Geotechnique[M].Beijing:China Water Power Press,2007.(in Chinese))
[10]聂卫平,徐卫亚,周先齐.基于三维弹塑性有限元的洞室稳定性参数敏感性灰关联分析[J].岩石力学与工程学报,2009,28(增2):3885-3893.(NieWeiping,Xu Weiya,Zhou Xianqi.Grey relation analy-sis of parameter sensitivity of cavern stability based on3D elastoplastic finite elements[J].Chinese Journal ofRock Mechanics and Engineering,2009,28(Supp.2):3 885-3 893.(in Chinese))
[2]谢心恒,吴冬梅.某水电站调压井衬砌应力稳定分析[J].水利水电工程设计,2009,28(3),11-13.(XieXinheng,Wu Dongmei.Stress and stability analysis ofsurge shaft lining of a hydroelectric power station[J].Design of Water Resources&Hydroelectric Engineer-ing,2009,28(3),11-13.(in Chinese))
[3]袁金亮,肖明,傅志浩,等.陡倾角岩体中阻抗式圆形调压井衬砌结构数值分析[J].岩石力学与工程学报,2004,23(8):1 296-1 300.(Yuan Jinliang,XiaoMing,Fu Zhihao,et al.Numerical analysis on liningstructure of restricted cylindrical surge chamber in rockmasses with steep obliquity[J].Chinese Journal ofRock Mechanics and Engineering,2004,23(8):1 296-1 300.(in Chinese))
[4]林鹏,周雅能,李子昌,等.官地地下尾水岔洞开挖与衬砌稳定研究[J].地下空间与工程学报,2010,6(2):283-289.(Lin Peng,Zhou Yaneng,Li Zichang,et al.Stability study on excavation and lining structureof Guandi tailrace bifurcation tunnel[J].Chinese Jour-nal of Underground Space and Engineering,2010,6(2):283-289.(in Chinese))
[5]黄生文,邓超荣,王晓明.大跨径隧道二次衬砌优化分析[J].中外公路,2010,30(1):201-204.(HuangShengwen,Deng Chaorong,Wang Xiaoming.Analysisof optimization of lining for the second time of large-spantunnel[J].Journal of China&Foreign Highway,2010,30(1):201-204.(in Chinese))
[6]张良,蒋文胜.金康水电站高压引水隧洞衬砌设计和优化探讨[J].四川水利发电,2007,26(6):17-20.(Zhang Liang,Jiang Wensheng.Design and optimiza-tion for high pressure headrace tunnel lining at Jinkanghydropower station[J].Sichuan Water Power,2007,26(6):17-20.(in Chinese))
[7]李效泉,闫红梅,张群波,等.水工隧洞衬砌结构作用的探讨[J].工程力学,2000(增),524-527.(Li Xi-aoquan,Yan Hongmei,Zhang Qunbo,et al.Study oneffect of hydraulic tunnel lining structure[J].Engi-neering Mechanics,2000,(Supp):524-527.(in Chi-nese))
[8]董哲仁.钢筋混凝土非线性有限元法原理与应用[M].北京:中国水利水电出版社,2002.(Dong Zher-en.Nonlinear finite element method of reinforced con-crete:theory and application[M].Beijing:China WaterPower Press,2002.(in Chinese))
[9]殷宗泽.土工原理[M].北京:中国水利水电出版社,2007.(Yin Zongze.Geotechnique[M].Beijing:China Water Power Press,2007.(in Chinese))
[10]聂卫平,徐卫亚,周先齐.基于三维弹塑性有限元的洞室稳定性参数敏感性灰关联分析[J].岩石力学与工程学报,2009,28(增2):3885-3893.(NieWeiping,Xu Weiya,Zhou Xianqi.Grey relation analy-sis of parameter sensitivity of cavern stability based on3D elastoplastic finite elements[J].Chinese Journal ofRock Mechanics and Engineering,2009,28(Supp.2):3 885-3 893.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心