本文選題：跨斷層帶隧道 + 隧道震害　； 參考：《西南交通大學(xué)》2014年博士論文

【摘要】：眾所周知,隧道圍巖對地震波的傳播具有明顯的控制特性,襯砌結(jié)構(gòu)在地震過程中與地層具有相同的震動(dòng)特性-即對圍巖具有追隨性,所以隧道的地震響應(yīng)受到圍巖條件的影響。實(shí)踐證明,圍巖條件較好的地下工程結(jié)構(gòu)(隧道、地下廠房等),具有較好的抗震性,隧道洞身震害多發(fā)于地層條件有變化較大且圍巖質(zhì)量較差部位。斷層破碎帶具有圍巖質(zhì)量差、應(yīng)力集中明顯、局部有明顯空洞等特征,其過渡段呈現(xiàn)圍巖由地質(zhì)條件差過渡到較好或者由較好地質(zhì)條件過渡到較差等工程地質(zhì)特征,活動(dòng)斷裂帶更是伴隨著明顯的蠕變等動(dòng)態(tài)特征,是隧道震害的集中部位,所以在工程中研究斷層破碎帶的地震響應(yīng)特性具重要的現(xiàn)實(shí)意義。論文依托鐵道部重點(diǎn)科技項(xiàng)目：“高烈度地震區(qū)隧道結(jié)構(gòu)抗震減震關(guān)鍵技術(shù)研究”等重點(diǎn)科研項(xiàng)目開展了隧道穿越斷裂帶地震響應(yīng)特征及抗震技術(shù)的研究,主要通過資料整理、振動(dòng)臺模型試驗(yàn)及數(shù)值模擬等展開,其主要成果如下。1、穿越斷層破碎帶隧道既有震害資料整理分析與震害影響因素研究。通過對國內(nèi)外主要大地震(如1995年兵庫縣南部大地震、1999年臺灣集集地震和2008年汶川地震)中穿越斷層帶隧道震害結(jié)果整理的基礎(chǔ)上,對隧道穿越斷層破碎帶的震害破壞類型等進(jìn)行了分析和總結(jié),提出了隧道穿斷層破碎帶震害的影響因素。2、通過振動(dòng)臺模型試驗(yàn)及數(shù)值計(jì)算得到隧道穿越斷層破碎帶地震響應(yīng)特征實(shí)施了隧道穿越斷層破碎帶的大型振動(dòng)臺模型試驗(yàn),主要通過改變地震動(dòng)參數(shù)等,對地層和襯砌結(jié)構(gòu)的地震響應(yīng)特征與規(guī)律進(jìn)行了系統(tǒng)研究。3、穿過斷層破碎帶隧道的抗震措施分析。結(jié)合振動(dòng)臺模型試驗(yàn)及數(shù)值計(jì)算對隧道設(shè)置相應(yīng)抗震措施進(jìn)行了分析研究,得出了斷層帶優(yōu)化的抗震組合措施；以高黎貢山鎮(zhèn)安斷裂帶為例,分析研究了不同隧道洞室形狀條件下斷層破碎帶圍巖及結(jié)構(gòu)的地震動(dòng)響應(yīng)特征,同時(shí)從隧道擴(kuò)挖和鉸接等方面研究了隧道通過斷裂帶的結(jié)構(gòu)措施,得出了隧道的擴(kuò)挖量及鉸接設(shè)置相關(guān)參數(shù)；通過分析計(jì)算得出了斷層破碎帶兩側(cè)抗減震設(shè)防措施的最優(yōu)距離。論文結(jié)合我國高烈度地震區(qū)穿斷層破碎帶隧道中實(shí)際問題,利用資料整理、振動(dòng)臺模型試驗(yàn)及數(shù)值模擬等方法,揭示了穿斷層破碎帶段隧道的地震動(dòng)力響應(yīng)特性及相應(yīng)的抗震措施；以上成果對于合理認(rèn)識隧道穿越斷層破碎帶的地震響應(yīng)特征具有重要意義,并對隧道實(shí)際工程設(shè)計(jì)和施工的抗震設(shè)防提供了寶貴的基礎(chǔ)資料。
[Abstract]:As we all know, the tunnel surrounding rock has obvious control characteristics on the propagation of seismic wave, and the lining structure has the same vibration characteristics as the stratum during the earthquake process-that is, it has the following property to the surrounding rock.So the seismic response of tunnel is affected by surrounding rock condition.It is proved by practice that underground engineering structures with better surrounding rock conditions (such as tunnels, underground powerhouses, etc.) have good aseismic properties, and the earthquake damage of tunnel body is mostly in the parts where the formation conditions change greatly and the mass of surrounding rock is poor.The fault fracture zone is characterized by poor mass of surrounding rock, obvious stress concentration, obvious local cavity and so on. The transition section of fault fracture zone shows engineering geological characteristics such as the transition of surrounding rock from poor geological conditions to better or from better geological conditions to worse ones.The active fault zone is accompanied by obvious dynamic characteristics such as creep and is the concentrated site of tunnel earthquake damage. So it is of great practical significance to study the seismic response characteristics of fault fracture zone in engineering.Based on the key scientific and technological projects of the Ministry of Railways, such as "study on key techniques of Seismic and Seismic absorption of Tunnel structures in High intensity earthquake area" and other key scientific research projects, the research on seismic response characteristics and seismic techniques of tunnel crossing fault zone is carried out, mainly through data collation.The main results of shaking table model test and numerical simulation are as follows: 1. Analysis and analysis of existing seismic damage data and study on influencing factors of seismic damage in tunnel across fault broken zone.On the basis of sorting out the results of tunnel damage in major major earthquakes at home and abroad (such as the 1995 Hyogo earthquake in the south, the Jiji earthquake in Taiwan in 1999 and the Wenchuan earthquake in 2008),This paper analyzes and summarizes the types of earthquake damage of tunnel through fault broken zone.The influence factors of seismic damage of tunnel through fault broken zone are put forward. Through shaking table model test and numerical calculation, the seismic response characteristics of tunnel passing through fault broken zone are obtained, and the large-scale shaking table model test of tunnel crossing fault broken zone is carried out.The seismic response characteristics and laws of strata and lining structures are studied systematically by changing ground motion parameters and so on. The aseismic measures of tunnels passing through fault broken zone are analyzed.Combined with shaking table model test and numerical calculation, the corresponding anti-seismic measures of tunnel setting are analyzed and studied, and the optimized seismic combination measures of fault zone are obtained, taking the Zhenan fault zone of Gaoligongshan as an example,The characteristics of ground motion response of surrounding rock and structure of fault fracture zone under different tunnel cavern shape are analyzed and studied. At the same time, the structural measures of tunnel passing through fault zone are studied from the aspects of tunnel expansion and articulation, etc.The relevant parameters of tunnel expansion and joint setting are obtained, and the optimum distance of anti-seismic protection measures on both sides of fault fracture zone is obtained by analyzing and calculating.Combining with the practical problems in the tunnel in the high intensity earthquake area of China, the paper uses the methods of data collation, shaking table model test and numerical simulation, etc.The characteristics of seismic dynamic response and the corresponding seismic response of tunnel through fault broken zone are revealed, and the above results are of great significance for the rational understanding of seismic response characteristics of tunnel through fault broken zone.It also provides valuable basic data for seismic fortification of actual tunnel engineering design and construction.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：U452.28

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