大断面海底隧道建设的安全风险评估和控制对策论文.pdf

  本文关键词：大断面海底隧道建设的安全风险评估与控制对策，由笔耕文化传播整理发布。

网友hnet653近日为您收集整理了关于大断面海底隧道建设的安全风险评估和控制对策论文的文档，，希望对您的工作和学习有所帮助。以下是文档介绍：中图分类号:XXXXUDC:XXXX学校代码:XXXX密级:公开北京交通大学博士学位论文大断面海底隧道建设的安全风险评估与控制对策ASSESSMENT AND CONTROL MEASURES OF SECURITYIUSK DI爪ING CONSTRUCTION OF LARGESECTION SU『B SEA TU湖EL作者姓名:谭光宗导师姓名:王梦恕学位类别:工学学科专业:岩土工程学号:04115229职称:院士学位级别:博士研究方向:隧道风险北京交通大学2014年6月万方数据学位论文版权使用授权书lIIIll lllll Illlllllll Illl lU I IlllY2735248本学位论文作者完全了解北京交通大学有关保留、使用学位论文的规定。特授权北京交通大学可以将学位论文的全部或部分内容编入有关数据库进行检索,提供阅览服务,并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向国家有关部门或机构送交论文的复印件和磁盘。(保密的学位论文在解密后适用本授权说明)学位论文作者签名:洱埠导师签名:签字日期:仂∥年∥月/妇签字日期:y膨年/月/‘日万方数据致谢本论文的工作是在我的导师王梦恕院士的悉心指导下完成的,王梦恕院士严谨的治学态度和科学的工作方法给了我极大的帮助和影响。在此衷心感谢多年来王梦恕院士对我的关心和指导。张顶立教授悉心指导我们完成了实验室的科研工作,在学习上和生活上都给予了我很大的关心和帮助,在此向张顶立老师表示衷心的谢意。在实验室工作及撰写论文期间,李兵、曹刚等同学对我论文中的风险评价模型和数值模拟研究工作给予了热情帮助,在此向他们表达我的感激之情。另外也感谢家人,他们的理解和支持使我能够在学校专心完成我的学业。万方数据中文摘要中文摘要摘要:海底隧道上方为无限的海水,围岩环境复杂,且地质勘察困难,很难在施工前详细掌握隧道工程地质与水文地质条件,施工中存在较多的不确定性,风险事故一旦发生将带来非常严重的损失,小则延误工期、增加投资,大则可能出现灭顶之灾。如何通过深入研究和系统总结,从理论和技术两个方面建立海底隧道风险评估与控制的科学体系显得尤为重要。本文的研究正是以此为契机,依托大连湾跨海通道工程,综合采用文献与专家调研、理论解析、数值模拟和现场资料调研等多种研究手段,对大断面海底隧道建设的安全风险评估与控制对策进行了系统深入的研究,取得了以下研究成果:(1)系统总结了工程风险的基本概念和特点,提出海底隧道建设风险的定义。根据风险管理理论阐述海底隧道工程施工风险的产生机理和作用过程,对孕险环境、致险因子、风险事故、承险体等概念作出明确界定,指出海底隧道建设期全过程安全风险的特点,提出海底隧道核心风险基本特征、影响因素、控制原则,以及风险分析评价的具体程序和方法,建立海底隧道建设风险分析评价模型和风险接受准则。(2)将海底隧道突水风险后果分为生命损失、社会损失、环境影响损失和经济损失(包括直接经济损失和间接经济损失),将可拓工程方法应用于厦门海底隧道左线F1风化槽施工突水后果严重性分析,有效地解决了突水后果严重性损失难以统一衡量的问题。(3)基于国内外常见的风险辨识方法,根据大连湾海底隧道的相关资料和类似工程资料,结合本工程特点和难点对钻爆法、沉管法、盾构法进行安全风险辨识,采用专家调查法并结合数值计算、相关工程资料调研对钻爆法、沉管法、盾构法进行风险分析、评估,分析其影响因素与潜在后果,给出初步的风险等级评定,对可能的重要风险进行罗列,并且提出了相应的控制措施。(4)依托大连湾海底隧道,对工程可行的两个方案分别对应的两种施工方法下的安全风险进行了综合评估,并提出了相应的控制措施。同时对核心安全风险的概念和特点进行阐述,对三种工法海底隧道的核心风险进行分析,在对相关工程资料广泛调研的基础上,对各风险影响因素进行了等级划分,根据隶属度函数得到各因素的等级评价矩阵。采用模糊数学与可拓工程学理论分别预测风险发生可能性等级和后果严重性等级,得到各方案的核心风险均属不可接受风险,为可行的最低风险限度范围,并提出了三种工法核心风险相应的控制措施。(5)通过对备选方案盾构法、沉管法、钻爆法各项风险系数和综合风险系数万方数据北京交通大学博士学位论文的分析,指出大断面海底盾构具有软硬不均地层适应性差、机械设备制作难度高、经验少等特点,技术风险、安全风险、经济风险均比较大;大断面沉管法隧道具有施工场地占用大、水下爆破对海洋环境破坏大,浮运、沉放对海上航运有很大影响等特点,环境风险较大;大断面钻爆法海底隧道具有连续掘进距离较长、作业环境差、不良地质段施工风险大等特点,技术风险、安全风险均比较大。经过对大连湾海底隧道两个线位方案相应的两种施工方案的综合比选,推荐采用沉管法修建。关键词:海底隧道;建设风险;核心风险;钻爆法;盾构法;沉管法分类号:U459.5;TU473.1万方数据ABSTRACTABSTRACTABSTRACT:Because ofthe infinite seawater above,plicated surrounding rockand the difficulty in geological exploration,it is hardly to obtain the geological andhydrogeology situation of submarine tunnel engineering before the construction,inwhich there are many uncertainties,once the risk accident occurred,it WOuld bringserious losses,which are from a construction period delay and investment increase to agreat disasters.It is important to establish the risk assessment and control scienti6csystem of submarine tunnel in two aspects of theory and technology by further researchand systematic summarization.This paper relies on the Dalian Bay cross.sea channelengineering,researches on the security risk assessment and control countenTleasure ofthe large section submarine tunnel construction,the research achiev锄ents aresummarized as follows.(1)This paper summarizes the basic concept and features of engineering risksystematically and puts forward the definition of the submarine tunnel constmction risk.And many conceptions such as the risk surroundings,the risk factors,the risk accidentsand the risk bodies are defined explicitly,at the same time,the features of the unnel security risk during the whole construction period,the basic trait,the influencingfactors and the control principles of core risk in submarine tunnel constIuctions and mespecific processes and methods of risk analysis assessment have also been proposed inthis paper,based on these achievements,the risk analysis assessment model and the eptance criteria are established.(2)The consequences of water inrush risk in submarine tunnel construction aredivided into life loss,society loss,surrounding influence loss and economic loss(whichinclude the direct and the indirect economic loss),the extension engineering method isused in analyzing the water inrush consequence severity in the F 1 weathered troughconstruction of the left line of the Xiamen subsea tunnel in this paper,and the problemthat the water inrush consequence severity loss cannot be considered unifiedly has beensolved effectively.(3)Based on the usual risk identification methods at home and abroad,according to therelevant data and the similar engineering data of the Dalian Bay submarine tunnel,bining the trait and difficulties of this project,this paper identifies the security riskof drilling and blasting method,pipe sinking method and shield driving method,万方数据analvzes and evaluates the risks of drilling and blasting method’pipe sinking memodand shield driving method by using expert investigation,humericalcalculatlon andrel“ant en西neering data research,at last,the paper presents the prelim‘mary nsk缪adesassessment,spread out the likely fatal risks and puts forward the corresponding controlmeasures· 一(4)Rel啊ng on the Dalian Bay Subsea Tunnel,pr.ehensiveassessment of secufftyrisks of the two constmction methods,respectively corresponding to two pr0Jectfeasible pro伊砌mes,was carried out,the correspondingcontrol measures were alsoDut fo刑ard.At the same time,the concepts and features of core risk security have beenelaborated,the core risks of three different engiiaeering methods undersea tunnels haVebeen analysed.Thevarious impact factors 0f risks are classified on the basis ofextensive inVestigation and research on the j relevant engineering data, the rankevaluation matrix of each factor is obtained according tO membershiP functlon·Thelikelihood level and the severity level of the oonsequencesof risks are predlCtedbyusing the theory of the fuzzy mathematics and the Extension engineering·‘Ihen,ltcaIl beproved that the core risks of the program are eptable risks,but in the鼢1bleminim啪risk limits.Core risk control measures corresponding to three enganeenngmethods have been proposed. ..(5)Throu曲the analysis of each risk coefficient prehensive risk f-actor ot thealternatives,shield,pipe sinking method,drilling,it has been pointed out:Largecross.section subsea shield has such characteristics as uneven hardness,Poor tomatlonadaptability’high difficulty of the productionof machinery alld eqmpment lessexD耐ence,and technical risk,safety risk,economic risk are relatively large;Largecross.section imnlersed 劬e tunnel has such characteristics as large usage ofconstruction site,large destruction of underwater blasting on the the manneenvir0舯ent, great impact on the maritime shipping of floating, slnking, aIldenvirollmental risk are relatively large;Large CROSS—section drilling and blasting m弛odtumel has such characteristics anlonger continuous driving distance,Poor operatingenviro脚ent’big constmction risk of bad geological section,and technical nsk,secmtyrisk are relatively large.The Dalian Bay Subsea Tunnel two positions correspondingtothe parison and selection,mended the use of 1mmersednlbe constmction.After parison and selection of the Mo kinds otconstmction sdlenles corresponding to the two line position program of Dallall Bay1lndersea tunnel,the immersed tube construction method is mended·万方数据ABSTRACTKey words:subsea tunnel;construction risk;core risk;drilling and blasting method;shield method;immersed tube methodCLASSNO:U459.5:TU473.1V万方数据目录目录中文摘要……………………………………………………………………………iA】3STRACT………………………………………………………………………………………………iiil 绪{仑……………………………………………………………………………………….。.1.1.1 选题背景及意义…………………………………………………...1.1.1.1选题背景……………………………………………………….1-1.1.2选题意义……………………………………………………….2.1.2 论文依托工程概况与特点………………………………………...4.1.2.1大连湾海底隧道工程概况…………………………………….4.1.2.2大连湾海底隧道工程特点…………………………………….7.1.2.3大连湾隧道风险管理重点…………………………………….9.1.3 国内外研究现状………………………………………………….1 O.1.3.1隧道及地下工程风险管理国外研究现状…………………..11.1.3.2隧道及地下工程风险管理国内研究现状…………………..12.1.3.3海底隧道风险研究现状……………………………………..12.1.3.4海底隧道工程风险研究存在的主要问题…………………..13.1.4 论文研究内容…………………………………………………….14.1.5 论文研究思路与方法…………………………………………….15.1.6 论文创新点……………………………………………………….16.2 海底隧道建设风险研究基础理论与评估程序………………………一19.2.1 工程风险基本概念……………………………………………….19.2.1.1工程风险的定义……………………………………………..19.2.1.2海底隧道建设风险的定义…………………………………..20.2.2 海底隧道建设风险发生的机理………………………………….21-2.2.1风险形成机理………………………………………………..21.2.2.2海底隧道建设期全过程安全风险特点……………………..24.2.2.3核心风险因素与控制原则…………………………………..25.2.3 海底隧道施工风险评估程序与管理…………………………….25.2.3.1风险评估…………………………………………………….一25.2.3.2风险评估的程序……………………………………………..26.2.4 海底隧道核心风险评估方法…………………………………….27.2.4.1基于模糊学的核心风险可能性评估方法…………………..28.万方数据北京交通大学博士学位论文3 42.4.2核心风险后果严重性评估方法……………………………..32.2.5 海底隧道建设风险综合评估模型……………………………….38.2.6 本章小结………………………………………………………….42.海底隧道主要施工方案风险因素辨识和分析……………………….43.3.1 钻爆法海底隧道安全风险因素辨识和分析…………………….43—3.1.1地质勘查……………………………………………………..43.3.1.2不良地质……………………………………………………..44.3.1.3超大断面开挖及支护………………………………………..52.3.1.4防排水系统…………………………………………………..59.3.1.5监控测量……………………………………………………..59.3.1.6施工组织等…………………………………………………..59.3.1.7其他特殊风险………………………………………………..60.3.2 沉管法海底隧道安全风险因素辨识和分析…………………….60.3.2.1干坞内的工作………………………………………………..60.3.2.2隧道管节的浮运与系泊……………………………………..61.3.2.3挖槽与基础处理……………………………………………..61.3.2.4沉放……………………………………………………………………………...61.3.2.5回填……………………………………………………………………………...62.3.2.6最终接头……………………………………………………..62.3.3 盾构法海底隧道安全风险因素辨识和分析…………………….62.3.3.1地质勘查……………………………………………………..63.3.3.2不良地质……………………………………………………..63.3.3.3盾构的设计、生产与运输…………………………………..64.3.3.4竖井开挖……………………………………………………..65.3.3.5进出工作井…………………………………………………..65.3.3.6管片设计、生产与运输……………………………………..66.3.3.7盾构掘进和隧道施工………………………………………..66.3.3.8横通道………………………………………………………..68.3.4 本章小结………………………………………………………….68.大连湾海底隧道安全风险评估与控制措施………………………….69.4.1 大连湾工程与水文地质情况…………………………………….69.4.1.1地形地貌……………………………………………………..69.4.1.2地质构造……………………………………………………..69.4.1.3岩土工程性质………………………………………………..72.万方数据

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  本文关键词：大断面海底隧道建设的安全风险评估与控制对策，由笔耕文化传播整理发布。