妈湾跨海隧道明挖段基坑施工风险评估
摘要：妈湾跨海通道工程明挖段隧道基坑最大深度约30m,地质条件复杂,存在成分复杂的人工填土、填石层及深厚的淤泥、淤泥质土层,施工环境非常复杂。场地存在多层地下水,其中与海水具有一定水力联系的第四系承压水对工程影响较大。建立长条形基坑工程施工的总体风险评价指标体系,对明挖段基坑施工总体风险进行评估;根据模糊数学原理,建立基坑工程的模糊综合评判模型,以K5+700—K6+500里程范围的隧道施工为例,采用模糊层次分析法进行专项风险评估。确定了施工总体风险及各工序风险等级,并给出典型风险源的控制措施建议。
关键词：隧道工程基坑风险评估风险识别模糊层次分析法控制
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[7] 赵延喜,徐卫亚.基于AHP和模糊综合评判的TBM施工风险评估[J].岩土力学,2009,30(3):793-798.
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Construction Risk Assessment of the Foundation Excavation in the Open-cut Section of Mawan Cross-sea Tunnel
Abstract: The maximum depth of the foundation excavation in the open-cut section of Mawan Cross-sea Tunnel is as deep as 30 m. The existence of artificial fill with complex composition and deep muck and mucky soil makes the geological conditions poor. The construction environment is very complicated. There are several layers of groundwater. The quaternary artesian water, which has a certain hydraulic relation with seawater, has a great influence on the project. The evaluation index system is established to evaluate the overall risk of open-cut construction. According to the principle of fuzzy mathematics, a fuzzy synthetic evaluation model is established for the foundation excavation engineering. The construction risk of the foundation excavation engineering within mileage range of K5+700—K6+500 is emphatically analyzed by means of fuzzy analytic hierarchy process. The overall risk grade and grades of risks at all levels are determined. Suggestions are given to control the typical risks.
Keywords: tunnels; foundation excavation; risk assessment; risk identification; fuzzy analytic hierarchy process; control
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