Investigation On The Abandoned Air-Raid Shelter And Study On The Stability Of Wall Rock

Air-raid shelter are widely distributed over the cities in our country because of historical reasons and special requirements in the past. However, the fact that their concrete distribution restricts the development of above ground buildings, which are near to the Air-raid shelter, because it has existed for a long time and was picked unordered, also the distributing location is not clear. So it very realtic to strengthen the exact evaluation of the investigation of shallow underground excavation and the stability of wall rock, which can contribute to the security of above ground buildings and the maintenance of functions of air-raid shelter by adopting proper measures.Based on predecessor's research method and achievements on the investigation of shallow underground excavation and the stability of wall rock, the thesis, which has the "SHI JI HUA YUAN" in Wulumuqi City as an example, aims to present the predictable equation and the fast evaluation methods of stability of wall rock, which can be acquired by taking the following steps and methods.First we can have the general knowledge of their distributions through on the spot survey, then adopt the high density resistivity method, lastly passing the validate by drilling, it make clear that the results which tested by high density resistivity method is reasonable and believable. On the basis of the general knowledge of their distributions, we can carry out systematic researches on the stability of wall rock. The mechanism for failure under the effect of every factors and the variability law are studied by means of FLAC numerical simulation by choosing typical geological model. The safety loading of roof forecasting equation is obtained by stepwise regression analysis.