The Research Of Key Construction Technique On Underground House Of A Hydroelectric Plant

Abstract: It is a complex progress that the underground house holes construction of hydraulic and hydroelectric project. The construction schedule depends on many factors, such as the style, dimension and scale, country rock stability and support pattern, lay-out of construction traffic and transport, construction period, the major construction mechanic equipment and so on. So the underground house holes construction is one of the critical projects of the control progress of the whole project. Therefore, it is important that the reliable accelerated construction technique should be accepted in addition to the reasonable lay-out of construction access road, the correct construction method and procedure. This paper studies the key construction technique of the big scale underground house holes(430.26 meters long, 31.9 meters wide and 75.1 meters high) of a hydroelectric plant at Southwest, aims at the problems such as the complex ground formation surrounding, the worse geologic condition, the hard construction, the safety of project and so on, makes a study of the accelerated construction technique of super scale underground holes on the basis of the option of lay-out of construction access road, the comparison choose of single project construction technique, construction procedure, progress schedule design and the safety construction and good quality. This paper not only supplies the technical guide to the construction and organization of this project, but also applies the responding technical support to the researches of the likes.The key construction techniques mainly take on aspects as follows:1. Option of construction access road layout. According to the constraint, verifying the criteria of construction access road lay-out, opting the schemes and making the opted scheme.