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隧道建设(中英文) ›› 2025, Vol. 45 ›› Issue (4): 749-757.DOI: 10.3973/j.issn.2096-4498.2025.04.009

• 研究与探索 • 上一篇    下一篇

内外水压作用下圆形水工隧洞衬砌受力分析的解析方法

刘宜杰1, 2, 黄本胜2, *, 袁明道2, 黄锦林2, 祝二浩2, 谭彩2   

  1. (1. 中山大学土木工程学院, 广东 广州 510610 2. 广东省水利水电科学研究院, 广东 广州 510610)
  • 出版日期:2025-04-20 发布日期:2025-04-20
  • 作者简介:刘宜杰(1993—),男,福建福州人,2022年毕业于华北电力大学,岩土及地下工程专业,博士,现从事水工建筑、岩土工程的力学分析工作。E-mail: gdskylyj@163.com。*通信作者: 黄本胜, E-mail: 1024701585@qq.com。

Analytic Methods for Bearing Mechanism of Circular Hydraulic Tunnels Under Internal and External Hydraulic Pressures

LIU Yijie1, 2, HUANG Bensheng2, *, YUAN Mingdao2, HUANG Jinlin2, ZHU Erhao2, TAN Cai2   

  1. (1. School of Civil Engineering, Sun Yat-sen University, Guangzhou 510610, Guangdong, China; 2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, Guangdong, China)
  • Online:2025-04-20 Published:2025-04-20

摘要: 为量化隧洞开挖引起的围岩压力、输水运行中的内外水压在围岩-衬砌结构中的传递和分配,采用复变函数方法建立一种地层-结构计算模型。将作用于圆环衬砌上的内外水压简化为径向均布荷载,并基于围岩-衬砌完全接触边界条件,即应力连续和位移协调,求解反映两者相互作用关系的解析函数,由此得到围岩-衬砌结构内任意位置处的应力和位移分量。分析结果表明: 1)围岩-衬砌之间的接触径向应力呈余弦分布,剪力呈正弦分布; 2)外水压的存在导致围岩-衬砌之间的有效应力减小; 3)考虑外水压作用时可在一定程度上减小高内水压运行引起的衬砌拉应力区。

关键词: 圆形水工隧洞, 衬砌, 内外水压, 复变函数理论, 荷载传递机制

Abstract:

To analyze the transfer and distribution of surrounding rock pressure caused by tunnel excavation, as well as internal and external hydraulic pressures acting on the rock-lining structure, a formation-structure calculation model is established using the complex function theory. The hydraulic pressure on the ring lining is simplified to a radial uniform load. An analytical function describing the interaction between the surrounding rock and lining is derived using complete contact boundary conditions, specifically, stress continuity and displacement coordination. Finally, the stress and displacement components at any position in the surrounding rock and lining structure are derived. The analysis yields the following results: (1) The radial contact stress between the surrounding rock and lining exhibits a cosine distribution, whereas the shear force exhibits a sine distribution. (2) The external hydraulic pressure reduces the effective stress between the surrounding rock and lining. (3) The action of the external hydraulic pressure partially reduces the lining tension stress zones caused by high internal hydraulic water pressure.

Key words: circular hydraulic tunnel, lining, internal and external hydraulic pressures, complex function theory, load transfer mechanism