Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel

LI Qiang; WANG Ming-nian; LI Yu-wen

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Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel

更新时间：2026-06-25

- Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel
- Vol. 27, Issue 4, (2006)
- 作者机构：
  
  1. 铁道第四勘察设计院,武汉,430063
  2. 西南交通大学地下工程系,成都,610031
  3. 四川省公路勘察设计研究院,成都,610041
- 作者简介：
- 基金信息：
- DOI：
  CLC： U456
- Online First：05 November 2013，
  
  Published：2006
- 稿件说明：
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LI Qiang, WANG Ming-nian, LI Yu-wen. Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel[J]. 2006, 27(4).
DOI：

LI Qiang, WANG Ming-nian, LI Yu-wen. Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel[J]. 2006, 27(4). DOI：

摘要

针对双跨连拱隧道设计和施工中存在的问题，采用三维有限差分程序FLAC3D2.0，对两种中墙结构的空间受力特征进行了研究，对比分析各自的优缺点及适用条件，并提出了施工注意事项。研究结果表明，在II类围岩地质条件下浅埋连拱隧道采用分离式曲中墙结构受力较为合理；左洞掌子面距研究断面3倍洞径时，中墙内力已稳定；左右洞掌子面距研究断面(－1～+1)D的施工，是中墙内力变化较大的关键工序。

Abstract

Aiming at open problems in the design and construction of double span arch-connecting tunnel

a research on three-dimensional stress characteristics of two types midboard is carried out by means of finite difference method FLAC3D2.0; and their merits and demerits

as well as applicable conditions are analyzed. The result shows that stress of separated type curved wall is more proper than integral type stalk on shallow depth double span arch-connecting tunnel in the condition of II type rock; inner force of midboard has been in stabilization when left cavern heading face drives to three times diameter from researched cross-section; while right and left cavern heading face drives to (–1–1)D time diameter from reseached cross-section

inner force of midboard greatly changes

and these constructions are key processes.

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