Rapid Construction Scheme And Analysis Of Backfill Of Diversion Bottom Tunnel And Penstock Chute

In this thesis, the back fill scheme of diversion bottom tunnel and power penstock chute with low-heat and micro-expanding concrete is made based upon the layout of construction site and the provided equipment condition of Wanjiazhai Project by comparing the various kinds of concrete with the backfill scheme of diversion bottom tunnel and power penstock.First of all according to this scheme, one-dimensional temperature distribution and stress state in the backfill concrete are numerically analyzed with finite differential method, explicating the concrete with low-heat and micro-expanding has the properties of low volume in heat-isolation and temperature increase as well as micro-expanding in self-generation, and early rength and crack resistance, it' s widely used in the parts of a building where it has strongly constrain and the concrete is poured largely and simultaneously, the heat from these parts is not transferred effectively.Second the backfill technique of low-heat and micro-expanding concrete is described in detail, which can be greatly beneficial to simplifying the thermal stress control, shortening the construction period as well as reducing the construction cost.The study methods and conclusion have great referential value for structure calculator and designing people.