|本期目录/Table of Contents|

[1]陈江.大跨度公路隧道洞口段爆破对高边坡安全影响研究[J].中国安全生产科学技术,2020,16(2):85-91.[doi:10.11731/j.issn.1673-193x.2020.02.014]
 CHEN Jiang.Study on influence of blasting at portal sectio of large span highway tunnel on safety of high slope[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(2):85-91.[doi:10.11731/j.issn.1673-193x.2020.02.014]
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大跨度公路隧道洞口段爆破对高边坡安全影响研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年2期
页码:
85-91
栏目:
职业安全卫生管理与技术
出版日期:
2020-02-29

文章信息/Info

Title:
Study on influence of blasting at portal sectio of large span highway tunnel on safety of high slope
文章编号:
1673-193X(2020)-02-0085-07
作者:
陈江
(贵州省交通规划勘察设计研究院股份有限公司,贵州 贵阳 550000)
Author(s):
CHEN Jiang
(Guizhou Transportation Planning Survey & Design Academe Co.,Ltd.,Guiyang Guizhou 550000,China)
关键词:
山岭隧道洞口边坡爆破锚杆加固安全性
Keywords:
mountain tunnel portal slope blasting anchor reinforcement safety
分类号:
X947;U455.6
DOI:
10.11731/j.issn.1673-193x.2020.02.014
文献标志码:
A
摘要:
为研究大断面公路隧道洞口段爆破开挖对边坡稳定性的影响,以某公路隧道洞口段工程为研究背景,基于Abaqus有限元软件,建立隧道—边坡三维数值计算模型,研究隧道洞口段爆破开挖对两侧高边坡安全性的影响,并分析砂浆锚杆对边坡的加固效果。结果表明:隧道洞口段爆破开挖施工时边坡坡脚处围岩振速最大,爆破对边坡水平振速影响较竖向振速及轴向振速更为显著,爆破时应控制坡脚及坡肩的水平振速;边坡坡面最大振速出现在洞口边坡坡面与仰坡坡面交线位置,边坡坡面与仰坡坡面交线上顶点为坡肩振速最危险的特征点,下端点为坡面振速最危险的特征点;增加锚杆长度对边坡水平位移的控制效果较竖向位移更为显著,锚杆长度宜取14 m。研究结果可为类似工程提供理论借鉴。
Abstract:
In order to study the influence of blasting excavation at the portal section of large section highway tunnel on the slope stability,taking the portal section project of a highway tunnel as the research background,a threedimensional numerical calculation model of tunnelslope was established based on the Abaqus finite element software.The influence of blasting excavation at the portal section of tunnel on the safety of high slopes on both sides was studied,and the reinforcement effect of mortar anchor on the slope was analyzed.The results showed that during the blasting excavation construction at the portal section of tunnel,the vibration velocity of surrounding rock at the slope toe was the largest,and the influence of blasting on the horizontal vibration velocity of slope was more significant than that of vertical vibration velocity and axial vibration velocity,so the horizontal vibration velocities of slope toe and slope shoulder should be controlled during the blasting.The maximum vibration velocity of the slope surface appeared at the intersection of the portal slope surface and the front slope surface,so the top point on the intersection of the slope surface and the front slope surface was the most dangerous characteristic point for the vibration velocity of slope shoulder,and the bottom point was the most dangerous characteristic point for the vibration velocity of slope surface.The control effect of increasing the anchor length on the horizontal displacement of slope was more significant than that of vertical displacement,and the anchor length should be taken as 14 m.The research results can provide some theoretical references for similar projects.

参考文献/References:

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相似文献/References:

备注/Memo

备注/Memo:
收稿日期: 2019-10-14
* 基金项目: 贵州省交通厅科技项目(2018-141-025);贵州省科技计划项目(2018-3011)
作者简介: 陈江,硕士,高级工程师,主要研究方向为隧道及地下工程。
更新日期/Last Update: 2020-03-16