3.2Earthquake magnitude3.2。1. Stren

3.2Earthquake magnitude3.2。1. Strengthen the seismic structure of metro stationBecause a large number of intermediate trains are sheared at both ends, the design and construction of strong trains and weak beams should be constructed according to the system. In addition, the construction of lateral force resistance of the station structure should be strengthened.In the subway station, the stiffness will change suddenly, for example, at the junction of different size or shape sections, the stress concentration phenomenon is easy to occur during the earthquake.The shape of subway station structure shall be as simple as possible and smooth.The strength of the material and the size of the section of the vertical lateral force resisting member should be gradually reduced from bottom to top to prevent the sudden change of the bearing capacity and lateral stiffness of the lateral force structure.According to the seismic requirements, the stirrup of reinforced concrete frame column should be set at a specific position.In order to minimize the ratio of longitudinal reinforcement and the anchorage length of middle column reinforcement, it is necessary to adopt the reinforcement measures of foundation structure consistent with the seismic grade.[9]3.3Flood disaster3.3.1。Active preparation before flood control（1） Reserve emergency materials: sandbags, mobile pumps and other flood control materials., which can be used for rainwater pouring, such as station, etc.(2) Accumulate the data needed for flood control: including the number of flood control materials, such as the number of sandbags, the width between the entrances and exits, the scale of the station and the external connection part, the external environment, such as the terrain outside the station, and establish the basic data and flood control material account.(3) Check the drainage equipment regularly: keep the drainage equipment unobstructed at any time to ensure the normal use of drainage equipment.3.3。2 flood control emergency response(1) In case of heavy rainfall, the subway staff need to measure and record the water level regularly, predict the possible rising trend of water level, and prepare various flood control equipment in advance.(2) If the rainwater enters the subway station, it shall be cleaned as soon as possible, and the rainwater shall be discharged into the drainage ditch, and the pump shall be opened and drained at an appropriate time to avoid affecting the normal use of the station and the personal safety of the staff in the station.3.3.3。Post flood analysis(1) Data accumulation of metro station in flood season: record and analyze the water level data and emergency material consumption of metro station in flood season, so as to accumulate experience for subsequent flood control work.(2) Analyze the emergency handling capacity of subway personnel in this flood season: according to the emergency handling capacity of station personnel in this accident analysis, strengthen the training of weak links, make up for the lack, and prepare for the same situation next time.(3) Analyze and summarize the emergency response process, and improve and optimize it with experience.[7]