南京纬三路过江通道工程盾构段施工风险评估

发布时间：2018-06-16 19:08

本文选题：水下盾构隧道 + 风险评估　；参考：《现代隧道技术》2015年04期

【摘要】：由于地质条件的复杂性及不可预见性,水下盾构隧道施工安全风险评估已经成为地下工程研究的重要课题。文章以南京纬三路过江通道工程为背景,对盾构段施工风险因素的辨识和施工风险的评价进行了分析,并制定了各风险因素的控制措施。分析结果表明:南京纬三路过江通道带压开舱作业是盾构长距离穿越高水压、强透水复合地层时风险控制的首要目标,可以从减少开舱更换刀具的次数、设定合理的切口压力及确保开挖面形成稳定泥膜等方面降低风险;盾构掘进过程的风险控制,主要通过检测盾构掘进参数的变化、停机分析参数异常原因等方面进行;各种风险应急预案和应急物资设备等风险控制措施的完备,也是减少风险损失的重要措施。该研究对类似工程的风险分析和控制有参考意义。
[Abstract]:Due to the complexity and unpredictability of geological conditions, the safety risk assessment of underwater shield tunnel construction has become an important subject of underground engineering research. Based on the construction risk factors identification and construction risk evaluation of shield section, the paper analyzes the risk factors identification and construction risk evaluation, and formulates the control measures of each risk factor. The analysis results show that the operation of opening tank with belt pressure in Nanjing weitou third channel crossing channel is the primary goal of risk control when shield machine passes through high water pressure and strong permeable composite formation at a long distance, and can reduce the times of tool changing in opening tank. The risk control of shield tunneling process is mainly carried out by detecting the change of shield tunneling parameters and analyzing the abnormal reasons of parameters by setting reasonable incision pressure and ensuring the formation of stable mud film on the excavating surface. The completion of various risk control measures, such as emergency plan and emergency equipment, is also an important measure to reduce risk loss. This study has reference significance for risk analysis and control of similar projects.
【作者单位】：中交隧道工程局有限公司;
【基金】：交通部建设科技项目(2013 318 Q03 030)
【分类号】：U455.43

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