本文選題：大斷面淺埋暗挖海底隧道 + 三孔隧道　； 參考：《地下空間與工程學(xué)報》2014年01期

【摘要】：基于大型有限元軟件ABAQUS,采用有限元無限元組合方法對大斷面淺埋暗挖海底隧道CRD法施工進行了模擬分析,研究包括:初始地應(yīng)力場分析,圍巖注漿預(yù)加固,服務(wù)隧道的開挖及其影響,主隧道CRD法不同施工工序?qū)λ淼绹鷰r、支護結(jié)構(gòu)以及地表沉降的影響等。研究認為:新提出的初始地應(yīng)力場定義方法較之前方法為佳;服務(wù)隧道開挖時,地表沉降成V形分布,主隧道開挖時,地表沉降變成W形分布;CRDⅠ部開挖和CRDⅡ、Ⅲ、Ⅳ部開挖引起的隧道圍巖最大沉降位置不同;CRDⅡ部初期支護對圍巖的變形有一定的控制作用;主隧道Ⅲ部拱頂?shù)膰鷰r沉降量較大;主隧道底拱角部存在應(yīng)力集中和較大的塑性變形。研究結(jié)果對于類似工程的設(shè)計與施工具有一定的參考價值。
[Abstract]:Based on the large finite element software Abaqus, the CRD method of large section shallow buried undersea tunnel is simulated and analyzed by using the finite element infinite element combination method. The research includes the analysis of initial ground stress field and the pre-reinforcement of surrounding rock grouting. The excavation of service tunnel and its influence, the influence of different construction procedure of main tunnel CRD method on tunnel surrounding rock, supporting structure and surface subsidence, etc. The results show that the new definition method of initial in-situ stress field is better than that of the previous method, the ground subsidence becomes V-shaped distribution during tunnel excavation, and the ground subsidence becomes W-shaped distribution during main tunnel excavation and CRD 鈪，

本文編號：1960248