隧道开挖爆破对邻近桩基的影响研究
发布时间：2018-11-19 14:13
【摘要】：随着我国交通事业的蓬勃发展,城市中的隧道工程将会越来越多。由于工程条件的限制,这些隧道有很大一部分需要采用爆破方法去进行开挖,爆破产生的震动效应有可能危及到周围建筑物或构筑物的安全。为此,如何预测和控制爆破震动效应以保障建筑物或构筑物的安全,已成为当前隧道工程和爆破工程界亟待解决的一项重要课题。本文以重庆市江北区海尔路立交系统中回头下穿隧道爆破开挖工程作为背景。探寻了隧道爆破对抗滑桩工作性状的影响,通过采用理论分析、数值模拟分析方法进行研究,论文主要内容如下:(1)利用Midas.GTS有限元软件,针对隧道在同一水平线不同位置建立有限元模型。模拟了14种不同单桩与隧道中心线水平距离条件下隧道爆破,重点分析爆破对单桩振动速度的影响及其变化规律。(2)针对隧道在同一水平线不同位置建立有限元模型,绘制出不同位置隧道爆破开挖所对应桩振动速度峰值的变化趋势图,通过分析并结合相应规范,得出在该工况条件下桩基与隧道中心线的爆破安全距离。(3)通过在实际工程背景条件下的隧道爆破模拟,并结合模拟结果和相应影响因素分析,提出了降低城市隧道爆破对桩基影响的措施。
[Abstract]:With the vigorous development of traffic in our country, more and more tunnel projects will be built in cities. Due to the limitation of engineering conditions, most of these tunnels need to be excavated by blasting method. The vibration effect of blasting may endanger the safety of surrounding buildings or structures. Therefore, how to predict and control the blasting vibration effect to ensure the safety of buildings or structures has become an important issue to be solved urgently in the field of tunnel engineering and blasting engineering. The background of this paper is the blasting excavation project in Haier Road Interchange system of Jiangbei District, Chongqing. This paper explores the effect of tunnel blasting on the working behavior of anti-slide piles. The main contents of this paper are as follows: (1) using Midas.GTS finite element software, the main contents of this paper are as follows: (1) by means of theoretical analysis and numerical simulation analysis method, A finite element model is established for tunnel at different positions of the same horizontal line. In this paper, the blasting of a tunnel under 14 different conditions of horizontal distance between single pile and tunnel centerline is simulated. The influence of blasting on vibration velocity of single pile and its variation law are analyzed. (2) the finite element model is established for the tunnel at different positions at the same horizontal line. The variation trend diagram of the peak vibration velocity of the pile corresponding to the blasting excavation in different positions is drawn. Through analysis and combining with the corresponding specifications, The safety distance between the pile foundation and the center line of the tunnel is obtained under this condition. (3) the blasting simulation of the tunnel under the actual engineering background is carried out, and the simulation results and the corresponding influencing factors are analyzed. The measures to reduce the influence of urban tunnel blasting on pile foundation are put forward.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.6
本文编号：2342564
[Abstract]:With the vigorous development of traffic in our country, more and more tunnel projects will be built in cities. Due to the limitation of engineering conditions, most of these tunnels need to be excavated by blasting method. The vibration effect of blasting may endanger the safety of surrounding buildings or structures. Therefore, how to predict and control the blasting vibration effect to ensure the safety of buildings or structures has become an important issue to be solved urgently in the field of tunnel engineering and blasting engineering. The background of this paper is the blasting excavation project in Haier Road Interchange system of Jiangbei District, Chongqing. This paper explores the effect of tunnel blasting on the working behavior of anti-slide piles. The main contents of this paper are as follows: (1) using Midas.GTS finite element software, the main contents of this paper are as follows: (1) by means of theoretical analysis and numerical simulation analysis method, A finite element model is established for tunnel at different positions of the same horizontal line. In this paper, the blasting of a tunnel under 14 different conditions of horizontal distance between single pile and tunnel centerline is simulated. The influence of blasting on vibration velocity of single pile and its variation law are analyzed. (2) the finite element model is established for the tunnel at different positions at the same horizontal line. The variation trend diagram of the peak vibration velocity of the pile corresponding to the blasting excavation in different positions is drawn. Through analysis and combining with the corresponding specifications, The safety distance between the pile foundation and the center line of the tunnel is obtained under this condition. (3) the blasting simulation of the tunnel under the actual engineering background is carried out, and the simulation results and the corresponding influencing factors are analyzed. The measures to reduce the influence of urban tunnel blasting on pile foundation are put forward.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.6
【参考文献】
相关期刊论文 前4条
1 王梦恕;;二十一世纪是城市地下空间开发利用的年代[J];民防苑;2006年S1期
2 刘华军;重庆某车站隧道爆破震动控制技术[J];西部探矿工程;2005年S1期
3 何军,于亚伦,梁文基;爆破震动信号的小波分析[J];岩土工程学报;1998年01期
4 唐浩,朱传云,潘瑞勇;朝阳寺电站隧洞开挖中的爆破震动控制[J];中国农村水利水电;2005年01期
，本文编号：2342564
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2342564.html
