复合式衬砌隧道模型试验及其承载特性研究  

Model tests and bearing characteristics of composite lining of tunnel

作　　者：吴鹏 陈健[1,2,3,4,5] 崔岚 徐晨 WU Peng;CHEN Jian;CUI Lan;XU Chen(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Hubei Key Laboratory of Geo-Environmental Engineering,Wuhan 430071,China;China-Pakistan Joint Research Center on Earth Sciences,Islamabad,Pakistan;National-Local Joint Engineering Research Center of Underwater Tunneling Technology,Wuhan 430063,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]中国科学院大学,北京100049 [3]湖北省环境岩土工程重点实验室,湖北武汉430071 [4]中国-巴基斯坦地球科学研究中心,伊斯兰堡 [5]水下隧道技术国家地方联合工程研究中心,湖北武汉430063 [6]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《岩土工程学报》2024年第S01期102-106,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金面上基金项目(52079135);中国铁建股份有限公司科研计划项目(2021-B18);铁四院科技计划项目(2021K038)。

摘　　要：中国山岭隧道常采用复合式衬砌支护,探究复合式衬砌的承载特性对矿山法隧道支护设计具有重要意义。设计了大型隧道结构模型试验系统,开展了毛洞、喷锚组合支护和复合式衬砌支护的大尺寸隧道模型试验,通过监测隧道破坏全过程,分析不同支护形式下隧道的破坏模式和支护结构受力特征,揭示了复合式衬砌的承载特性。结果表明:复合式衬砌支护较喷锚组合支护相比设计承载力提高了33.3%;两种支护形式下,围岩可承受约60%~75%的外荷载,施加二次衬砌后,二次衬砌可分担约15%~80%的围岩压力;喷锚组合支护较复合式衬砌相比能更好的发挥锚杆的效果。The mountain tunnels in China often use composite lining support.To explore the bearing characteristics of the composite lining to guide the design of the mining method tunnel is of great significance.A large tunnel structural model test system is designed to carry out large-size model tests on the unsurported,spray-anchor combined support and composite lining support.The whole process of tunnel damage is monitored,and the damage modes of tunnels under different forms of support and the stress characteristics of the support structure are analyzed so as to reveal the bearing characteristics of composite lining.The results show that the composite lining support increases the design bearing capacity by 33.3% compared with the combined spray-anchor support.Under the two forms of support,the surrounding rock can withstand about 60%~75% of the external load,and after its application,the secondary lining can share about 15%~80% of the pressure of the surrounding rock.The combined spray-anchor support can better use the effects of anchors compared to the composite lining.

关 键 词：复合式衬砌 模型试验 承载特性 荷载分担比例 

分 类 号：TU452[建筑科学—岩土工程]