Guiyang Metro System Line 1 Tunnel Construction Safety Risk Assessment

The length of Guiyang metro system line 1 is 34.308 kilometers. Line 1 is located at the center of Guiyang, there are many buildings, municipal roads, railway lines, municipal pipelines along it.In addition,there are also many poor geological conditions along side,such as karst, coal seam gas, expansive soil and rock, red clay, bedding landslide, and soft soil, etc.Variable surroundings and complicated techniques add so many difficulties to the designers and constructors, which may lead to engineering accident.So the safety risk assessment for Guiyang metro system line 1 plays an imperative role in the construction of the tunnel.This paper mainly discusses the interval between Shachong road station and Wangchenpo station, combines with the hydrological conditions, geological conditions,the surroundings along side the line 1 and construction features. In this paper, the fuzzy comprehensive evaluation method is used to evaluate and analysis the risk of construction,surroundings, natural, poor geology and total risk. Under this method, the level of respectively risk and total risk could be knew, which can provide guiding suggestions for designers and constructors. The main work are as follows.(1) The research background of this topic will be stated in detail.This paper will introduce the risk management at home and abroad, and put forward the major significance and content of the study.(2) A series of risk management theoretical systems will be discussed in detail, and introduced the basic steps and methods of risk identification, estimation, basic steps and methods of evaluation of response measures respectively.(3) Raising the safety risk assessment method to evaluate and analysis the Guiyang metro system line 1 between Shachong road station and Wangchenpo station, the method is called fuzzy comprehensive evaluation method. And giving a reasonable risk assessmentstandard, combines with the features of tunnel engineering.(4) Give an evaluation to the safety risk assessment method of Guiyang metro system line 1 between Shachong road station and Wangchenpo station. Conclusions can be drew, the risk level of construction itself is level?at the beginning of the construction of Guiyang metro system between Shachong road station and Wangchenpo station, and the risk level of the surroundings, natural and poor geology and total risk are all level ?.(5) Put forward some measures to deal with the risk in the construction, to reduce or divert the risk, according to the drill and blast tunneling method, auxiliary construction,buildings and structures and poor geology, etc.