软弱围岩斜井转正洞工法动态施工力学行为分析

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摘要斜井施工将引起斜井转正洞交叉段附近岩体与支护结构力学行为发生变化。文章结合八苏木隧道土卜子斜井工程，采用有限差分软件FLAC3D对小包法施工全过程进行三维数值模拟分析。分析结果表明：斜井施工对隧道的纵向影响主要位于巷道右侧6 m范围内，横向影响主要位于斜井与正洞锐部交角处；对围岩应力与横向位移影响较大，巷道右侧6 m内正洞整体向斜井一侧偏移，产生偏压现象；对斜井与正洞锐部交角处岩体扰动较明显，其塑性区基本贯通。

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斜井施工软弱围岩小包法数值模拟力学行为

Abstract： During construction from an inclined shaft to the main tunnel in soft surrounding rock, the mechanical behavior of the supporting structure and the rock mass near the intersection will experience variation because of the construction of the inclined shaft. Using the Tubozi inclined shaft of the Basumu tunnel as an example, a three-dimensional numerical simulation analysis of the construction process using the part-envelope construction method was carried out by the finite difference software FLAC3D. The results show that: the most affected areas were at 6m on the right side of the gallery in the longitudinal direction and at the sharp intersection point of the inclined shaft and main tunnel in the transverse direction due to shaft construction; the surrounding rock stress and horizontal displacement were greatly affected, the main tunnel was offset toward the inclined shaft at the span of 6m on the right side of the gallery, and bias pressure occurred; and the rock mass at the sharp intersection point of the inclined shaft and main tunnel was greatly disturbed and the plastic zone was almost connected.

Keywords： Inclined shaft construction')" href="#">

Inclined shaft construction, Weak rock, Part-envelope construction method, Numerical simulation, Mechanical behavior

出版日期: 2012-05-22

基金资助:

国家自然科学基金资助项目（50104013）；重庆市科学基金重点资助项目（CSTC,035679）.

作者简介: 章剑（1988-），男，工学硕士，主要从事隧道抗减震等领域的工作，E-mail:sherlingzx@163.com

引用本文:

.软弱围岩斜井转正洞工法动态施工力学行为分析[J] 现代隧道技术, 2013,V50(2): 46-51

.Analysis of Dynamic Mechanical Behavior During Construction from an Inclined Shaft to the Main Tunnel in Soft Surrounding Rock[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(2): 46-51

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http://www.xdsdjs.com/CN/ 或 http://www.xdsdjs.com/CN/Y2013/V50/I2/46