Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel

CAI Jian; LIU Jie

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Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel

更新时间：2026-06-25

- Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel
- Vol. 34, Issue S2, (2013)
- 作者机构：
  
  1. 三峡大学三峡库区地质灾害教育部重点实验室,湖北,宜昌,443002
  2. 湖北省水利水电规划勘测设计院,武汉,430064
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV732
- Online First：19 November 2013，
  
  Published：2013
- 稿件说明：
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CAI Jian, LIU Jie. Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel[J]. 2013, 34(S2).
DOI：

CAI Jian, LIU Jie. Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel[J]. 2013, 34(S2). DOI：

摘要

采用摩尔-库仑弹塑性模型的有限元分析方法和岩体开挖卸荷理论

并考虑地应力对隧洞的作用机制，建立丹巴水电站双洞四机引水隧洞软岩段三维开挖大型三维模型并进行岩体力学计算，分别以不同的掌子面推进深度进行开挖，从洞口开挖至一定深度。统计不同掌子面推进深度下各步开挖不同关键点处的位移变化情况，进行比选，建议工程实际应当选用的最佳掌子面推进深度；在该推进深度下，统计不同洞段不同位置的各向位移预留量，为超前支护的必要性提供依据和超前支护的施工提供数据支持，以保证工程施工的顺利进行，为后续类似工程设计提供参考。

Abstract

A large three-dimensional model of double hole four dimensional Danba hydropower station diversion tunnel excavation is established

and rock mechanics are calculated by using the Mohr-Coulomb model finite element analysis method and unloading rock mass theory and method

and the effect of stress on tunnel is considered to excavate in different depths of tunnel face

from the hole to a certain depth. The displacement changes of tunnel faces at different key points at each excavation are counted. In comparison

the depth of the best tunnel face propulsion should be selected. Under the propulsion depth

the amount of reserved displacements at different segments and locations of holes is counted to provide data support of necessity of advanced support so as to ensure the construction process successfully. It provides references for other similar engineering design.

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Related Institution

Geotechnical and Structural Engineering Research Center, Shandong University

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University

Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education, Wuhan University

School of Civil Engineering, Southwest Jiaotong University

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