承水压公路隧道衬砌损伤模型及识别方法研究

项目名称： 承水压公路隧道衬砌损伤模型及识别方法研究

项目编号： No.51478073

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 翁其能

作者单位： 重庆交通大学

项目金额： 81万元

中文摘要： 重大的隧道工程，在设计使用年限中，结构初期损伤、运营中各项劣化因子的共同作用都将导致结构的损伤积累和抗力衰减，结构抵抗能力下降，极端情况下可能引发灾难性的突发事故。如何保障结构健康运营，结构的损伤理论与损伤识别是最强有力的手段。 已有的适用于地面结构混凝土的损伤理论以及水工隧道水压损伤理论要应用于承水压公路隧道衬砌的损伤分析，还有诸多的不足之处；而基于动力参数的损伤识别方法也不适用于隧道结构。本课题拟通过试验与理论研究方法，揭示承水压隧道衬砌混凝土在围岩压力、水压应力及多种劣化因子作用下的损伤机理，构建衬砌混凝土实体性损伤与水压、水渗透、应力损伤的联合损伤模型；同时，研究适用于隧道结构的确定性静力参数损伤识别理论和定位方法。损伤理论模型和损伤识别理论结合，实现承水压隧道结构的损伤识别，进行损伤定位和损伤量识别。此研究内容对于保障地下结构的安全，做到结构灾难的预报、预警有很好的理论、现实意义

中文关键词： 公路隧道；衬砌；损伤模型；损伤识别；水压

英文摘要： During service life tunnel performance shall be deteriorated or damaged by initial damages, deterioration factors that will result to damage accumulation of the lining concrete and resistance decrease of the lining. In extreme case, these damage accumulations may cause disaster during tunnel service stage. Existed concrete damage theories to surface structure can not be applicable precisely to expressway tunnel under water pressure, and the damage and permeable theories on hydro tunnel are not suitable to Highway Tunnel Lining also for the difference of loads and actions. Another difficult is damage identification to tunnel lining, since the mature theories on surface structure damage identification are not applicable to tunnel lining for its low vibration characteristics. In this project, theory analysis and laboratory & field tests are used to reveal damage mechanism and characteristics of Highway Tunnel Lining under surround rock masses pressure, water pressure, and other deterioration factors, to draw out and establish combining expression of lining substantive damage, hydro-cause damage, pressure-cause damage. Using this combining expression, the promotion deterministic statics parameter damage identification method is studied to tunnel lining damage identification and damage location. These conclusions are benefit to ensure underground structures, tunnel lining under water pressure during service life. These works have significant theoretic and actual value for damage precast and disaster pre-warning of highway tunnel lining in life-time.

英文关键词： HIGHWAY TUNNEL;TUNNEL LINING;DAMAGE MODEL;DAMAGE IDENTIFICATION;HIGH WATER PRESSURE