滨海地区地铁隧道爆破开挖对邻近埋地管道的影响及安全控制研究

项目名称： 滨海地区地铁隧道爆破开挖对邻近埋地管道的影响及安全控制研究

项目编号： No.51208073

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 王海涛

作者单位： 大连交通大学

项目金额： 25万元

中文摘要： 爆破施工对邻近埋地管道的影响与安全控制研究，对地铁隧道快速掘进和管道安全防护具有重要的意义。本项目拟以大连地铁隧道为工程背景，通过管道腐蚀和力学性能试验，建立不同管道的腐蚀速率预测模型和剩余强度预测模型，确定不同阶段腐蚀管道的安全控制标准。采用相似材料模型试验与原位测试相结合的研究手段，揭示地铁隧道爆破开挖对邻近埋地腐蚀管道的影响机理。在试验研究的基础上，建立爆腔-岩土介质-腐蚀管道的相互作用数值模型，选择典型工况检验并修正该数值模型，分析不同地质条件、施工方法、装药量、爆心距、管道刚度以及埋地管道与隧道断面不同空间位置条件下爆破开挖对埋地管道影响的空间效应，研发多因素影响下隧道爆破开挖诱发管道失效的动力灾害预测模型，实现施工过程与重大事故源的相依关系判断。基于模糊理论和层次分析方法，提出管道安全性的层次-模糊综合评价体系和防护措施,为滨海地区地铁隧道爆破开挖提供指导作用。

中文关键词： 地铁隧道；爆破开挖；埋地管道；海水腐蚀；安全控制

英文摘要： Influence of blasting excavation of subway tunnel on nearby buried pipeline and safety control are of great significance for rapid excavation and pipeline protection. Take Dalian metro tunnel as example, the corrosion rate prediction models and corrosion residual strength prediction models for different pipelines are established by corrosion tests and mechanical tests, and then the safety control standards of corroded pipeline are established. The influence mechanism of blasting excavation of subway tunnel on nearby corroded pipeline is revealed by similitude material model tests and in situ tests. On the basis of experimental studies, the interaction numerical model of explosion cavity - rock media -corroded pipeline is created. The numerical model is tested and fixed by typical operating conditions. Spatial effect of blasting excavation on buried pipeline with different mass of detonator, the distance from blasting center, geology, pipe stiffness, and different spatial location of buried pipeline and tunnel are studied. Taking into account the multiple factors, the prediction model for tunnel blasting excavation induced pipeline failure disaster is created, which can help to judge the relationship between the construction process and a major accident. Based on fuzzy theory and the analytic hierarchy process, t

英文关键词： subway tunnel；blasting excavation；buried pipeline；seawater corrosion；safety control