隧道体外排水深埋中心水沟设计参数模型试验研究

doi:10.13722/j.cnki.jrme.2022.0863

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摘要隧道深埋中心水沟可有效减少富水地段仰拱高水压及其导致的隧底结构隆起问题。通过设计融合3D打印技术的隧道模型试验，探究了深埋水沟重要设计参数对隧道排水效能及结构安全性的影响规律，进一步地，给出深埋水沟重要设计参数的合理取值区间。研究结果表明：深埋水沟管径参数是影响隧道排水量、衬砌外水压力、结构位移的主导因素且存在阶段性影响规律，在0～0.8 m管径工况下，随着管径增长深埋水沟排水量增长明显，衬砌水压分布型式由“扇贝型”分布逐步转变为“桃型”分布，底部结构从整体显著隆起逐步转为轻微沉降状态，0.8～1.6 m管径工况下，随管径增长隧道排水总量、衬砌水压分布、底部结构位移维持基本稳定状态，兼顾其他控制因素，推荐类似工程中管径取值0.6～1.0 m；深埋水沟埋深参数并非是影响排水效能的主导因素，该参数选取时应从方便现场施工、保证排水效果、利于隧底稳定性等方面综合考虑。

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	相懋龙1
	阳军生1
	包德勇2
	李林毅1
	傅金阳1
	3

关键词 ：隧道工程, 铁路隧道, 体外排水, 深埋水沟, 隧底隆起, 3D打印技术, 模型试验

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.

Key words： tunnelling engineering railway tunnel external drainage deep buried gutter tunnel bottom uplift 3D printing technology model test

引用本文:

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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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0863 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I6/1508

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