(1. School of Civil Engineering，Central South University，Changsha，Hunan 410075，China；2. China Railway Siyuan Survey and Design Group Co. Ltd.，Wuhan，Hubei 430063，China；3. National Engineering Research Center of High-speed Railway Construction Technology，Changsha，Hunan 410075，China)
Abstract：Deep buried central gutter can effectively reduce the high water pressure in the water-rich area of the elevated arch and control the uplift of the tunnel bottom caused by high water pressure. By designing a 3D printed tunnel model test，the influence of the important design parameters of the deep buried gutter on the drainage efficiency and structural safety of the tunnel is investigated，and a reasonable range of values for the important design parameters of the deep buried gutter is given. The results of the study show that: the deep buried gutter pipe diameter parameter is the dominant factor affecting the tunnel drainage，lining water pressure and structural displacement，and there are phases in the pattern of influence，in 0–0.8 m pipe diameter conditions，with the increase of the pipe diameter，deep buried gutter drainage increased significantly，the distribution of lining water pressure gradually changed from“scallop type”distribution to“peach type”distribution，and the bottom structure gradually changed from an overall significant uplift state to a slight subsidence state. In 0.8–1.6 m pipe diameter conditions，with the increase of the pipe diameter，the total tunnel drainage，lining water pressure distribution and bottom structure displacement maintained a steady state of less variation，taking into account other control factors，the recommended value of pipe diameter in similar projects is 0.6–1.0 m. The burial depth parameter is not the dominant factor affecting the drainage efficiency，but should be selected to facilitate site construction，ensure the drainage effect and contribute to the stability of the tunnel bottom，etc.
相懋龙1，阳军生1，包德勇2，李林毅1，傅金阳1，3. 隧道体外排水深埋中心水沟设计参数模型试验研究[J]. 岩石力学与工程学报, 2023, 42(6): 1508-1519.
XIANG Maolong1，YANG Junsheng1，BAO Deyong2，LI Linyi1，FU Jinyang1，3. Model experimental study on engineering design parameters of deep buried central gutter for external drainage of tunnels. , 2023, 42(6): 1508-1519.
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2023, Vol. 42 
