【摘要】：隨著我國交通事業(yè)的蓬勃發(fā)展,城市中的隧道工程將會越來越多。由于工程條件的限制,這些隧道有很大一部分需要采用爆破方法去進行開挖,爆破產(chǎn)生的震動效應有可能危及到周圍建筑物或構筑物的安全。為此,如何預測和控制爆破震動效應以保障建筑物或構筑物的安全,已成為當前隧道工程和爆破工程界亟待解決的一項重要課題。本文以重慶市江北區(qū)海爾路立交系統(tǒng)中回頭下穿隧道爆破開挖工程作為背景。探尋了隧道爆破對抗滑樁工作性狀的影響,通過采用理論分析、數(shù)值模擬分析方法進行研究,論文主要內(nèi)容如下:(1)利用Midas.GTS有限元軟件,針對隧道在同一水平線不同位置建立有限元模型。模擬了14種不同單樁與隧道中心線水平距離條件下隧道爆破,重點分析爆破對單樁振動速度的影響及其變化規(guī)律。(2)針對隧道在同一水平線不同位置建立有限元模型,繪制出不同位置隧道爆破開挖所對應樁振動速度峰值的變化趨勢圖,通過分析并結(jié)合相應規(guī)范,得出在該工況條件下樁基與隧道中心線的爆破安全距離。(3)通過在實際工程背景條件下的隧道爆破模擬,并結(jié)合模擬結(jié)果和相應影響因素分析,提出了降低城市隧道爆破對樁基影響的措施。
[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.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U455.6

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本文編號：2342564