车云浩,池恩安,赵明生
CHE Yun-hao,CHI En-an,ZHAO Ming-sheng

• 1:贵州大学矿业学院

摘要(Abstract)：

为了研究隧道循环爆破对邻近在建桥梁的振动影响，以贵州晴隆战马田的泄洪隧道工程为背景，对比了不同爆破方案下测点的峰值振速。通过FLAC3D软件建立三维模型，模拟了循环爆破对在建桥梁桥面、桥桩产生的振动影响。结果表明：4掏槽孔，0.42 kg/t装药密度及50 ms延时的爆破方案测点峰值振速最低，且循环进尺较高；桥面和桥桩底部的峰值振速实测值分别为0.235、0.081 cm/s,模拟值分别为0.250、0.095 cm/s,模拟值与实测值误差在±11%内，说明利用动荷载模拟循环爆破效果的模型有效；爆破施工对桥梁产生的峰值振速处于0.05～0.25 cm/s,对在建桥梁材料强度的影响处于安全范围内，表明每日8次的循环爆破对43 m外的在建桥梁不会产生安全影响。
In order to study the vibration impact of tunnel cyclic blasting on the adjacent bridge under construction, taking the flood discharge tunnel project in Zhanmatian, Qinglong, Guizhou Province as the background, the paper compares the peak vibration velocities of measuring points of different blasting schemes. It applies the three-dimensional model established by FLAC3 D software to simulate the vibration impact of cyclic blasting on the deck and piles of the bridge. The results show that the blasting plan with 4 cutting holes, 0.42 kg/t charge density and delay time of 50 ms has the lowest peak vibration velocities and higher cyclic footage. The measured values of the peak vibration velocities of the bridge deck and the bottom of the bridge piles are 0.235 and 0.081 cm/s, respectively, and the simulated values are 0.250 and 0.095 cm/s, respectively. The error between the simulated values and the measured values is within ±11%, indicating that the model using dynamic load to simulate the impact of cyclic blasting is effective. The peak vibration velocity of the bridge caused by blasting is between 0.05 and 0.25 cm/s, and the impact on the material strength of the bridge under construction is within a safe range, indicating that 8 times of blasting a day will not have a safety impact on the bridge under construction at a distance of 43 m.

关键词(KeyWords)： 隧道;循环爆破;振动;在建桥梁
tunnel;cyclic blasting;vibration;bridge under construction

Abstract:

Keywords:

基金项目(Foundation): 地区科学基金资助项目(52064003)

作者(Author): 车云浩,池恩安,赵明生
CHE Yun-hao,CHI En-an,ZHAO Ming-sheng

DOI: 10.19931/j.EB.20200253

参考文献(References)：

• [1] 邹新宽，张继春，潘强，等.浅埋小净距隧道掘进爆破引起的地表振动特性模拟分析 [J].防灾减灾工程学报，2016,36 ( 4) :646-651.ZOU X K,ZHANG J C,PAN Q,et al.Simulation analysis of ground vibration characteristics caused by excavation and blasting of shallow buried small clear distance tunnel[J].Journal of Disaster Prevention and Mitigation Engineering,2016,36 (4):646-651.
• [2] 樊浩傅，邱军领，谢永利，等.下穿村庄隧道爆破振动对地表建筑的影响 [J].解放军理工大学学报 ( 自然科学版) ,2016,17 ( 3) :209-214.FAN H F,QIU J L,XIE Y L,et al.Blast-induced ground vibration from tunnel undercrossing a village[J].Journal of PLA University of Science and Technology ( Natural science),2016,17 (3):209-214.
• [3] 姚文娟，房霆宸，程泽坤.爆破边载对斜拉桥结构动力响应分析[J].水运工程，2012(4):36-43.YAO W J,FANG T C,CHENG Z K.Dynamic response analysis of cable-stayed bridge structure under blasting side load[J].Waterway Engineering,2012(4):36-43.
• [4] 杨爽.近距离爆破开挖对已建拱桥受力行为的影响研究[D].重庆：重庆交通大学，2014.YANG S.Study on the influence of near distance blasting excavation on the mechanical behavior of existing arch bridges [D].Chongqing:Chongqing Jiaotong University,2014.
• [5] 李胜林，刘殿书，崔英伟，等.基于实测爆破地震波下的铁路特大桥桥墩动力影响研究[J].北京理工大学学报，2015,35(2):123-124.LI S L,LIU D S,CUI Y W,et al.Study on dynamic influence of bridge pier of railway super large bridge based on measured blasting seismic wave[J].Journal of Beijing University of Technology,2015,35(2):123-124.
• [6] 叶红宇，杨小林，卓越.频繁爆破下隧道内振动传播的数值研究[J].现代隧道技术，2020,57(2):149-156.YE H Y,YANG X L,ZHUO Y.Numerical study on vibration propagation in tunnels under frequent blasting[J].Modern Tunnel Technology,2020,57 (2):149-156.
• [7] 梅竹，吴斌，杨格.钢筋混凝土结构材料本构模型参数的在线识别[J].工程力学，2016,33(7):108-115.MEI Z,WU B,YANG G.On line identification of constitutive model parameters of reinforced concrete structure materials[J].Engineering Mechanics,2016,33 (7):108-115.
• [8] OPPONG K,SAINI D,SAFEI B.Vulnerability assessment of bridge Piers damaged in barge collision to subsequent hurricane events[J].Journal of Bridge Engineering,2018,42 (1):77-82.
• [9] 张玉成，杨光华，刘鹏，等.爆破荷载在数值计算中的等效施加方法研究[J].地下空间与工程学报，2012,8(1):56-64.ZHANG Y C,YANG G H,LIU P,et al.Study on equivalent application method of blasting load in numerical calculation[J].Journal of Underground Space and Engineering,2012,8 (1):56-64.
• [10] 孟灵鑫，陈德云.隧道爆破施工对邻近桥梁安全的影响[J].铁道勘察，2019,45(5):54-58.MENG L X,CHEN D Y.Influence of tunnel blasting construction on adjacent bridge safety[J].Railway Survey,2019,45 (5):54-58.
• [11] 彭宇峰，单仁亮，宋永威，等.隧道爆破引起喷射混凝土累积损伤研究[J].混凝土，2020(8):61-66.PENG Y F,SHAN R L,SONG Y W,et al.Study on cumulative damage of shotcrete caused by tunnel blasting[J].Concrete,2020 (8):61-66.
• [12] 吴帅峰，李晨，栗曰峰，等.振动三要素对新浇混凝土影响的研究[J].爆破，2018,35(2):6-11.WU S F,LI C,LI Y F,et al.Study on the influence of three vibration factors on fresh concrete[J].Blasting,2018,35 (2):6-11.
• [13] DAN Z,YONG G,CAIYING Z,et al.Studying on the characteristics of vibration effect of the blasting of excavating anchorage tunnels of Chishui River Super Bridge[C]//IOP Conference Series:Earth and Environmental Science.IOP Publishing,2019,371(2):022056.