Centrifuge Model Test on Stratum Deformation Rule of Loess Road Tunnel Based on Double-hole Effect

doi:10.15961/j.jsuese.2013.04.023

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Centrifuge Model Test on Stratum Deformation Rule of Loess Road Tunnel Based on Double-hole Effect

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- Centrifuge Model Test on Stratum Deformation Rule of Loess Road Tunnel Based on Double-hole Effect
- Advanced Engineering Sciences Vol. 45, Issue 4, Pages: 39-45(2013)
- 作者机构：
  
  长安大学桥梁与隧道陕西省重点实验室
- 作者简介：
- 基金信息：
- DOI：10.15961/j.jsuese.2013.04.023
  CLC：
- Published：2013，
  
  Published Online：25 April 2013，
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来弘鹏,杨万精,谢永利.基于双洞效应的黄土公路隧道地层变形规律离心模型试验[J].工程科学与技术,2013,45(4):39-45.

Centrifuge Model Test on Stratum Deformation Rule of Loess Road Tunnel Based on Double-hole Effect. [J]. Advanced Engineering Sciences 45(4):39-45(2013)
来弘鹏,杨万精,谢永利.基于双洞效应的黄土公路隧道地层变形规律离心模型试验[J].工程科学与技术,2013,45(4):39-45. DOI： 10.15961/j.jsuese.2013.04.023.

Centrifuge Model Test on Stratum Deformation Rule of Loess Road Tunnel Based on Double-hole Effect. [J]. Advanced Engineering Sciences 45(4):39-45(2013) DOI： 10.15961/j.jsuese.2013.04.023.

摘要

中文摘要: 鉴于目前黄土公路隧道修筑面临的一些特有问题，为了更全面地了解双洞效应影响下黄土公路隧道地层变形规律，运用离心模型试验设备，系统开展了4组基于先加载后开洞思路的模型试验，研究了双洞不同净距对黄土公路隧道地层变形的影响。试验结果表明：随着双洞净距的增大，双洞间的相互影响程度减弱，靠近拱顶处的地层变形曲线由单峰值的V形逐步变为双峰值的W形；存在压力拱效应且压力拱的形成高度随双洞净距的增大而增大；先行洞室各层沉降范围及沉降值均略大于后行洞室，且随双洞净距的增大，先行洞室对后行洞室的影响程度逐渐减弱；选用0.5D间距形式，易在隧道间形成应力与变形强影响区，需对中间土体进行加固，选用D及以上间距形式，隧道间可以形成自稳的宽底承载土柱体，故小净距黄土公路隧道双洞间合理净距可选取为D。

Abstract

Abstract:In order to understand the stratum deformation rule of loess road tunnel under the influence of double-hole effect more comprehensively

four groups of model tests were carried out systematically with the centrifuge model test device

based on the thinking of first loading and then punching

and the influence of different double-hole clear distances on the stratum deformation of the loess road tunnel was researched.The test results showed that with the increase of double-hole spacing

the degree of the mutual influence between two holes will recede

and the stratum deformation curve close to the vault changes from single peak “V” shape to double peak “W” shape gradually.There exists the pressure arch effect

and the formation height of the pressure arch increase with the increase of double-hole clear distance.The sedimentation range and the sedimentation value of each layer of the anterior hole are larger than those of the subsequent hole

and the influence degree of the anterior hole on the subsequent tunnel will recede gradually with the increase of double-hole spacing. Selecting 0.5Dspacing form

the stress and deformation influence area between holes forms easily

so it’s necessary to reinforce the middle soil; selecting D spacing form and above

the steady wide-base bearing soil column between holes can form

so the reasonable spacing between two holes of closely spacing loess road tunnel can be D.

关键词

黄土隧道双洞效应地层变形模型试验

Keywords

loess tunneldouble-hole effectstratum deformationmodel test

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