Study On Construction Technology Of The Huangninao Tunnel On The Qiangui Railway

Relative merits of basic and auxiliary method of NMAT to sallow tunnel is analyzed and compared in this article and its range of application and selected condition is summed up. Selection to basic and auxiliary method of NMAT in different geology and construction condition is studied to specifically engineering, usual geology forecast and construction method to karsts tunnel is analyzed and compared, and then, application in real engineering is introduced and discoursed.Development and existing arum stances of construction method to sallow tunnel is introduced in this article. Application condition and relative merits of bench at method single-side heading method, double-heading method to sallow tunnel in single line or multiple line as pat forward. Auxiliary method to control acting face and land subsidence is introduced and selected importantly. On basic of topography and geology of Huangninao tunnel, determination an apply mend of construction method is introduced particularly and optimal design is put forward on basic of study on parameter of convergence.Now, the method of geology-forecast to tunnel is multiple, such as direct forecast method, geology-analyses method and geophysical exploration method, Valid methods is part forward in this uncle by compared relative merits of different methods. Construction methods through karst region are multiple. On basic of introduction of multiple methods, karsts in Hangninao tunnel is shorted and optimal design through karsts is selected in this article.