【摘要】：研究強(qiáng)震作用下隧道結(jié)構(gòu)的震害特征對于后續(xù)高烈度區(qū)隧道的抗震設(shè)防設(shè)計具有重要的借鑒意義。文章通過汶川地震公路隧道震害調(diào)查及分析,研究并總結(jié)了隧道結(jié)構(gòu)各部分的震害特征。洞口結(jié)構(gòu)的震害特征為:洞外結(jié)構(gòu)受次生地質(zhì)災(zāi)害影響嚴(yán)重,隧道洞口硬巖段支護(hù)結(jié)構(gòu)震害極少,8度區(qū)隧道洞口軟巖段出現(xiàn)二次襯砌開裂、滲水等輕微震害,11度區(qū)出現(xiàn)二次襯砌垮塌的嚴(yán)重震害;斷層破碎帶段隧道結(jié)構(gòu)的震害特征為:跨非活動性斷層隧道震害較輕,跨活動性斷層隧道震害嚴(yán)重(二次襯砌垮塌、圍巖垮塌等);普通段隧道結(jié)構(gòu)的震害特征為:隧道硬巖普通段震害極少,8度區(qū)圍巖軟硬交接普通段和9度區(qū)軟巖普通段襯砌出現(xiàn)開裂、滲水震害,10~11度區(qū)圍巖軟硬交接普通段出現(xiàn)襯砌錯臺震害,圍巖缺陷普通段出現(xiàn)了二次襯砌垮塌的嚴(yán)重震害。
[Abstract]:The study of seismic damage characteristics of tunnel structure under strong earthquake is of great significance for the seismic fortification design of tunnel in high intensity area. Based on the investigation and analysis of earthquake damage of highway tunnel in Wenchuan earthquake, this paper studies and summarizes the damage characteristics of every part of tunnel structure. The seismic damage characteristics of the structure are as follows: the structure outside the tunnel is seriously affected by the secondary geological hazards, the support structure of the hard rock section of the tunnel mouth is seldom damaged by earthquake, and the soft rock section of the tunnel mouth of the 8 degree tunnel appears secondary lining cracking, water seepage and other minor earthquake damage. The serious earthquake damage of secondary lining collapse occurred in the area of 11 degrees; The seismic damage characteristics of tunnel structure in fault broken zone are as follows: the seismic damage of transactive fault tunnel is light, and the seismic damage of cross-active fault tunnel is serious (secondary lining collapse, surrounding rock collapse, etc.); The characteristics of seismic damage of tunnel structure in ordinary section are as follows: the seismic damage of ordinary section of tunnel hard rock is very little, the lining of soft rock in 8 degree zone and soft rock ordinary section of 9 degree zone is cracked, and the damage of seepage is caused by earthquake. In the 10 ~ (th) ~ (th) area, the earthquake damage of the lining staggered platform appears in the ordinary section of the soft and hard transition of the surrounding rock, and the secondary lining collapse occurs in the common section of the surrounding rock defect.
【作者單位】： 北方工業(yè)大學(xué)土木工程學(xué)院;西南交通大學(xué)交通隧道工程教育部重點(diǎn)實驗室;四川省交通運(yùn)輸廳公路規(guī)劃勘察設(shè)計研究院;
【基金】：國家自然科學(xué)基金項目(51408008;41172250) 四川省應(yīng)用基礎(chǔ)研究計劃項目(2014JY0090;2015JY0166) 四川省交通科技項目(2013A1-5) 北方工業(yè)大學(xué)青年拔尖人才培育計劃項目(XN070017)
【分類號】：U452.28

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本文編號：2364229