强震区隧道软弱围岩洞口段注浆加固抗震效果分析  

Analysis on Seismic Effect of Grouting Reinforcement in Weak Surrounding Rockof the Entrance Section of the Tunnel in Strong Earthquake Area

作　　者：崔光耀 韦宜霏 王明胜 王天群 Cui Guangyao;Wei Yifei;Wang Mingsheng;Wang Tianqun(School of Civil Engineering,North China University of Technology,Beijing 100144,China;China Railway Urban Development Investment Group Co.,Ltd.,Chengdu,Sichuan 610000,China;Beijing Municipal Road and Bridge Co.Ltd.,Beijing 100045,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]中铁城市发展投资集团有限公司,四川成都610000 [3]北京市政路桥股份有限公司,北京100045

出　　处：《黑龙江工业学院学报（综合版）》2023年第7期121-129,共9页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：国家自然科学基金项目资助(项目编号:52178378)。

摘　　要：为提高强震区隧道软弱围岩洞口段的抗震安全性,依托葫芦丝隧道洞口段工程,利用有限差分数值计算软件对围岩采用全环接触注浆和全环间隔注浆抗震措施的抗震效果进行研究。研究结果表明:采用两种抗震措施,都有效提高了抗震效果;围岩采用全环接触注浆措施后,结构横向、纵向和竖向位移分别减小了10.98%、63.89%,、36.10%,边墙收敛值下降了19.12%,轴力及弯矩平均减小了34.91%、56.86%,最小安全系数平均提高了44.73%;围岩采用全环间隔注浆措施后,结构横向、纵向和竖向位移分别减小了4.88%、30.56%、21.71%,边墙收敛值下降了10.76%,轴力及弯矩平均减小了11.79%、32.14%,最小安全系数平均提高了28.01%;围岩采用全环接触注浆抗震措施的抗震效果更优。研究结果可为类似隧道洞口段抗震设防设计提供参考。In order to improve the seismic safety of the weak surrounding rock of the entrance section of the tunnel in strong earthquake area,based on the project of the Hulusi tunnel entrance section,this paper uses the finite difference numerical calculation software to study the seismic effect of the whole chain touch grouting and the whole chain alternative grouting seismic measures.The results show that:the two anti-seismic measures can effectively improve the anti-seismic effect;after adopting the whole chain touch grouting measures,the transverse,longitudinal and vertical displacements of the structure are reduced by 10.98%,63.89%,36.10%,the convergence value of the side wall is reduced by 19.12%,the axial force and bending moment are reduced by 34.91%,56.86%,and the minimum safety factor is increased by 44.73%;after adapting the whole chain alternative grouting measure,the horizontal,longitudinal and vertical displacements of the structure are reduced by 4.88%,30.56%and 21.71%respectively,the convergence value of side wall is reduced by 10.76%,the axial force and bending moment are reduced by 11.79%and 32.14%,and the minimum safety factor is increased by 28.01%.The seismic effect of surrounding rock with the whole chain touch grouting is better.The research results can provide a reference for seismic design of similar tunnel entrance sections.

关 键 词：隧道工程 软弱围岩洞口段 全环接触注浆 全环间隔注浆 抗震效果 

分 类 号：U451[建筑科学—桥梁与隧道工程]