發(fā)布時(shí)間：2018-01-12 05:03

  本文關(guān)鍵詞：地鐵隧道開挖安全關(guān)鍵位置分析及預(yù)測(cè)研究　出處：《安全與環(huán)境學(xué)報(bào)》2014年02期 　論文類型：期刊論文

  更多相關(guān)文章： 道路工程 安全預(yù)測(cè) 地表沉降 數(shù)值模擬 隨機(jī)介質(zhì)理論

【摘要】：為明確隧道開挖時(shí)易于引發(fā)安全事故的關(guān)鍵位置并預(yù)測(cè)地層變形趨勢(shì),以保證隧道施工和周圍構(gòu)(建)筑物的安全,采用Ansys通用有限元軟件對(duì)北京地鐵7號(hào)線廣雙區(qū)間隧道開挖過(guò)程進(jìn)行了數(shù)值模擬分析,并結(jié)合實(shí)際監(jiān)測(cè)結(jié)果對(duì)隧道開挖過(guò)程中地層變形和應(yīng)力重分布的變化規(guī)律和安全關(guān)鍵位置進(jìn)行了總結(jié);通過(guò)對(duì)隨機(jī)介質(zhì)理論方法的優(yōu)化研究,推導(dǎo)出簡(jiǎn)單可行的優(yōu)化計(jì)算公式。結(jié)果表明,隧道開挖中拱頂、拱腰和拱腳位置為變形較大和應(yīng)力分布集中的關(guān)鍵安全位置,優(yōu)化后的隨機(jī)介質(zhì)法計(jì)算公式用于地表沉降的安全預(yù)測(cè)分析是可靠的。
[Abstract]:In order to make clear the key position of safety accident and forecast the trend of formation deformation during tunnel excavation, the safety of tunnel construction and surrounding construction (construction) can be ensured. The excavation process of Beijing Metro Line 7 tunnel with wide and double section is simulated and analyzed by using Ansys general finite element software. Combined with the actual monitoring results, the variation law of formation deformation and stress redistribution during tunnel excavation and the key position of safety are summarized. Based on the optimization of stochastic medium theory, a simple and feasible formula of optimization calculation is derived. The results show that the arch in tunnel excavation. The position of arch waist and arch foot is the key safety position where deformation is large and stress distribution is concentrated. The optimized formula of stochastic medium method is reliable for the safety prediction and analysis of surface subsidence.
【作者單位】： 西安建筑科技大學(xué)土木工程學(xué)院;西安金地置業(yè)投資有限公司;
【基金】：住房與城鄉(xiāng)建設(shè)部科學(xué)技術(shù)項(xiàng)目(2012-R1-16) 陜西省教育廳專項(xiàng)科研計(jì)劃項(xiàng)目(2010JK638)
【分類號(hào)】：U456.3
【正文快照】： 0引言現(xiàn)代城市對(duì)交通能力的要求使得地鐵建設(shè)越來(lái)越多。地鐵一般多沿城市道路建設(shè),而地鐵隧道開挖后造成的地層損失和圍巖的應(yīng)力釋放會(huì)引起地層的移動(dòng)變形,導(dǎo)致路面下沉,嚴(yán)重時(shí)會(huì)破壞地下管線,對(duì)沿線建筑物造成影響,并且施工過(guò)程中地層的較大變形會(huì)引起隧道塌方,危害人員安全

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相關(guān)期刊論文 前9條

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本文編號(hào)：1412778