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中文摘要：
地铁车站基坑工程施工复杂，风险因素多，风险损失通常较大，需要提前对其风险进行分析与评价，并采用一定的措施来降低、转移或利用风险。通过专家调查法得出重要的风险因子及其概率和损失的估计值。由于专家的估值本身具有一定的模糊性，于是用一个模糊区间来描述其模糊性，即由确信程度采用恰当的模糊隶属函数曲线得到风险概率及损失的范围，最后确定风险等级。针对成都某地铁车站基坑施工风险评估，确定其风险等级为三级，属于可接受范围，应引起高度重视，加强监测，做好相应的处理措施。
英文摘要：
The engineering construction of subway station foundation pit is complex and includes a lot of risk factors. As the risk loss is usually big, it is necessary to analyze and evaluate the risk in advance, and adopt some measures to reduce and transfer or utilize the risk. Through expert survey method, the estimated value of probability and loss of the risk factors and loss can be obtained. As the very estimate of the expert is of certain fuzzy, appropriate fuzzy membership function curve with the degree of trust is used to get the scope of the risk, and finally determine the risk level. In the case of Chengdu subway station foundation pit construction, it is concluded that the risk level is assessed as level 3, which is acceptable and should be addressed with great importance, strengthened monitoring and proper treatment measures.
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