本文選題：淺埋隧道 + 爆破振動��； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：采用鉆爆法進(jìn)行隧道掘進(jìn)施工的過程中,爆破施工產(chǎn)生的振動被認(rèn)為是影響最大的負(fù)面效應(yīng)。在淺埋隧道工程的爆破施工中,由于隧道的埋深較淺,導(dǎo)致地表的振動效應(yīng)比較明顯。如果不了解爆破地震波在地表的傳播規(guī)律,就有可能導(dǎo)致地表的建筑物因過大的振動強(qiáng)度而發(fā)生破壞,造成嚴(yán)重的工程事故�？斩葱�(yīng)導(dǎo)致淺埋隧道爆破開挖時地表的振動發(fā)生區(qū)域性變化的特征,即隧道掌子面后方開挖成洞區(qū)拱頂上方地表的振動速度大于對稱位置未開挖區(qū)的地表振動速度的現(xiàn)象。本文主要以成貴高鐵豆子灣隧道下穿橋橋灣水庫為工程背景,通過對隧道上方地表進(jìn)行振動測試試驗和數(shù)值模擬計算相結(jié)合的方法,進(jìn)行爆破荷載作用下淺埋隧道地表振動的空洞效應(yīng)研究。對現(xiàn)場試驗測得的地表振動速度波形圖進(jìn)行分析,得到掏槽孔起爆引起的地表振動速度最大,掏槽孔起爆引起的振動對地表振動強(qiáng)度起決定性作用。提出空洞效應(yīng)振速放大系數(shù)作為衡量空洞效應(yīng)導(dǎo)致的地表振動放大效應(yīng)的標(biāo)準(zhǔn)。進(jìn)行數(shù)值模擬研究,提出爆破荷載的施加方法和邊界條件的處理措施,得到進(jìn)行爆破荷載作用下淺埋隧道地表振動研究的數(shù)值模擬方法,對計算結(jié)果進(jìn)行分析得到空洞效應(yīng)在隧道掘進(jìn)方向上的變化規(guī)律和隧道上方地表受空洞效應(yīng)影響的區(qū)域范圍。提出分段楔形掏槽的掏槽孔起爆方法來削弱空洞效應(yīng)導(dǎo)致的地表振動的放大效應(yīng),并在廣州地鐵二十一號線區(qū)間隧道上進(jìn)行應(yīng)用實踐。
[Abstract]:In the process of tunneling construction by drilling and blasting, the vibration produced by blasting construction is considered to be the most negative effect. In the blasting construction of shallow tunnel engineering, the vibration effect of the ground surface is obvious because of the shallow buried depth of the tunnel. If we do not understand the propagation law of blasting seismic wave on the surface of the earth, it is possible to cause the destruction of buildings on the surface due to excessive vibration intensity and cause serious engineering accidents. The cavitation effect leads to the regional variation of the surface vibration during the blasting excavation of shallow buried tunnel, that is, the vibration velocity of the surface above the arch roof is higher than that of the unexcavated area in the symmetrical position after the excavation of the tunnel surface behind the face of the tunnel. In this paper, based on the engineering background of Qiaqiao Bay Reservoir under the Douzi Bay Tunnel of Chenggui High-speed Railway, the vibration test and numerical simulation of the surface above the tunnel are carried out. The cavity effect of shallow tunnel surface vibration under blasting load is studied. By analyzing the waveform of surface vibration velocity measured by field test, it is found that the surface vibration velocity caused by cutting hole initiation is the largest, and the vibration caused by the opening hole detonation plays a decisive role in the surface vibration intensity. The magnification factor of cavity effect is put forward as the criterion to measure the effect of surface vibration amplification caused by cavity effect. In this paper, numerical simulation is carried out, and the method of applying blasting load and the treatment of boundary condition are put forward, and the numerical simulation method of surface vibration of shallow buried tunnel under blasting load is obtained. Based on the analysis of the calculated results, the variation of cavitation effect in the tunneling direction and the range of the area affected by the cavitation effect on the surface above the tunnel are obtained. In this paper, a new method is proposed to reduce the amplification effect of surface vibration caused by cavity effect, and the method is applied to the tunnel of Guangzhou Metro Line 21.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U455.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李智;潘冬;;爆破荷載作用下地表沉陷數(shù)值模擬[J];礦業(yè)研究與開發(fā);2014年07期

2 李平;宮鳳強(qiáng);李啟月;王澤偉;;黃鶴堡隧道下穿地表建筑物爆破振動控制技術(shù)[J];石家莊鐵道大學(xué)學(xué)報(自然科學(xué)版);2013年S2期

3 朱正國;孫明路;朱永全;孫星亮;;超小凈距隧道爆破振動現(xiàn)場監(jiān)測及動力響應(yīng)分析研究[J];巖土力學(xué);2012年12期

4 蘇曉X;;隧道開挖數(shù)值模擬的圍巖邊界取值范圍研究[J];鐵道工程學(xué)報;2012年03期

5 陳明;盧文波;李鵬;劉美山;周創(chuàng)兵;趙根;;巖質(zhì)邊坡爆破振動速度的高程放大效應(yīng)研究[J];巖石力學(xué)與工程學(xué)報;2011年11期

6 唐海;李海波;;反映高程放大效應(yīng)的爆破振動公式研究[J];巖土力學(xué);2011年03期

7 張永興;張遠(yuǎn)華;;隧道爆破開挖條件下地表建筑振動速度響應(yīng)研究[J];地震工程與工程振動;2010年06期

8 陳士海;張安康;燕永峰;徐琪;;爆破震動非一致激勵作用下建筑結(jié)構(gòu)響應(yīng)研究[J];振動與沖擊;2010年09期

9 張玉成;楊光華;姜燕;姚捷;史永勝;;沉管隧道基槽爆破施工對既有堤岸穩(wěn)定性影響的數(shù)值仿真分析[J];巖土力學(xué);2010年S1期

10 侯愛軍;;地鐵隧道開挖爆破對地表建筑物的振動影響[J];四川建筑科學(xué)研究;2010年03期

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