土工基础

土工基础 ›› 2026, Vol. 40 ›› Issue (2): 300-306.

• 专题论述 • 上一篇    下一篇

复杂岩体结构控制下地下洞室群轴线方向优化布置研究

王源佑1，陈国良2   

  1. (1.金华市轨道交通集团有限公司，浙江金华 321000；
    2.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，武汉 430071)
  • 收稿日期:2025-05-28 修回日期:2025-06-12 出版日期:2026-04-30 发布日期:2026-04-23
  • 通讯作者: 陈国良（1980-），男，高级工程师，研究方向为岩土工程监测与稳定性。
  • 作者简介:王源佑（1990-），女，工程师，研究方向为工程规划设计管理。

Optimization of Axis Direction of Underground Caverns under the Control of Complex Rock Mass Structure

WANG Yuanyou1, CHEN Guoliang2   

  1. (1.Jinhua Rail Transit Group Co. Ltd., Jinhua 321000;
    2.State Key Laboratory for Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2025-05-28 Revised:2025-06-12 Online:2026-04-30 Published:2026-04-23

摘要： 以某抽蓄电站地下洞室群为依托工程，针对其在复杂岩体结构与地应力共同控制下的轴线优化选取问题开展讨论。以高效考虑多组岩体结构的多节理本构模型为手段，开展了洞室轴线的初步与精细优化，提出了洞室群轴线方向的优化方法，获取了最优轴线。结果表明：①两组优势结构面对洞室群开挖响应的影响显著。在优势结构面控制下，洞室群的变形与塑性区分布模式与量值都有较大差异。在结构面控制下，洞室群最大变形量值发生在上游边墙；②对比初拟的290°、0°、330°三种轴线方向方案，从变形与塑性区的对比，可以认为0°方向与290°方向较优（其中0°略优于290°）。进一步考虑水流方向因素（近NE向），可以认为初拟的290°左右范围内的洞室轴线选取是合理的；③在285°~295°范围内，轴线方向对洞室开挖的变形、塑性区等指标影响不大，通过定量对比典型部位变形量值与塑性区体积，可以认为285°方向优于290°方向与295°方向，是当前条件下最佳轴线方向。

关键词: 地下洞室群, 轴线, 岩体结构, 地应力, 优化设计

Abstract: The axial arrangement of underground caverns is crucial and complicated in complex rock structures. This article explores the optimization selection of underground caverns axis in a pumped storage power station influenced by complex rock structures and geo-stresses. By employing a multi joint constitutive model for efficient consideration of multiple rock mass structures, preliminary and refined optimization of the cavern axis were conducted. The excavation response of surrounding rock is presented as the evaluation index, an optimization method for tunnel group axis direction was proposed. Results show that two dominant structural faces significantly affect the cavern group’s excavation response. Under advantageous structural planes control, differences exist in the caverns’ deformation and plastic zone distribution patterns and quantities. Under structural planes control, the cavern group’s maximum deformation occurs on the upstream side wall. Comparing the proposed 290°, 0°, and 330° axis directions, 0° is better than 290° based on deformation and plastic zone. Considering the near NE direction of water flow, current 290° axis is reasonable. Within 285°-295°, axial direction has little impact on cavity excavation deformation and plastic zone. Quantitative comparison indicates the 285° direction is optimal under current conditions. This study offers references for similar project construction and research.

Key words: Underground Caverns, Axis Direction, Rock Mass Structure, In Situ Stress, Optimal Design

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