發(fā)布時間：2018-04-08 22:25

  本文選題：海底隧道　切入點：地質條件　出處：《鐵道工程學報》2014年12期

【摘要】：研究目的:針對青島膠州灣海底隧道跨度大,施工難度大,洞身地質條件復雜,施工影響因素不確定,風險亦大的特點,研究、分析洞身斷層、涌水、圍巖分級變更等對施工的影響,為保障施工安全提供科學依據。研究結論:(1)膠州灣海底隧道洞身構造和裂隙水分布,受不確定因素的影響存在差異;(2)研究、分析了洞身斷層的具體位置和特征,找出了存在差異的原因:將斷層所用的方位角誤以為是走向方位角,造成了走向、傾向背離區(qū)域構造的異�，F(xiàn)象;(3)通過對圍巖變更數(shù)據的研究,繪制出圍巖分級變更比例示意圖,直觀反映了施工前后圍巖等級劃分的變化:原Ⅲ級圍巖所占的比例由53%變更調整為29%、Ⅳ級圍巖的比例由28%變更調整為58%、Ⅴ級圍巖的比例由10%變更調整為4%;(4)該研究成果可應用于隧道施工期間開展工程地質工作,實施動態(tài)設計,保障工程的質量、工期、安全和控制投資規(guī)模。
[Abstract]:Research purpose: in view of the characteristics of Qingdao Jiaozhou Bay subsea tunnel with large span, construction difficulty, complicated geological conditions, uncertain construction factors and great risk, the paper studies and analyzes the faults and water gushing of the tunnel body.The influence of the grade change of surrounding rock on the construction provides scientific basis for the safety of construction.Conclusion: (1) the structure and distribution of fissure water in Jiaozhou Bay subsea tunnel are different from each other by uncertain factors, and the specific location and characteristics of the fault are analyzed.The reasons for the difference are found: the fault azimuth is mistaken as the strike azimuth, which results in the anomaly of strike and tends to deviate from the regional structure.Drawing out the scale diagram of the grade change of surrounding rock,The change of grade of surrounding rock before and after construction is intuitively reflected: the proportion of original grade 鈪，

本文編號：1723632