| The Guiyang Urban Rail Transit line S2 is the trunk line.As the second boost engine for the development of Guiyang-Gui’an integration,it will strengthen the rapid connection between Gui’an core area and Guanshan Lake area,and the success of its construction is of great significance to the economic development of Guiyang City.CoMParing with the drilling and blasting method,shield method has a natural advantage in urban subway construction.But this area is a very typical karst landform,and the large scale and complex geological condition of it are relatively rare even at home and abroad.There are fewer precedents for using the shield method for construction under such geological conditions.Therefore,this thesis mainly focuses on the adaptability of shield method in running tunnel of Guiyang Urban Rail Transit line S2.The main results are as follows:1.By means of theoretical analysis,field survey and iterature investigation,the adaptability of construction methods used in running tunnel of backing projec is clarified,and the selection of shield machine is completed.2.The Shield tunnel structure design,lining waterproofing design of the running tunnel of backing project are completed,through using the method of theoretical analysis,field survey,iterature investigation and numerical simulation and combined with features of backing project.3.By means of theoretical analysis,field survey and literature investigation,and combined with features of backing project,the construction section division and site arrangement of backing project are completed,and the treatment measures of unfavorable geology and special section in the shield tunnel construction are given.4.The construction risk level and corresponding treatment measures of backing project are given through using the method of theoretical analysis,field survey,literature investigation and expert investigation.The above results have been used in the running tunnel of Guiyang Urban Rail Transit line S2,which will have a positive guiding significance for the construction of follow-up lines. |
