1∶1站立式大断面异形盾构管片力学试验系统的研发与应用  

Development and application of a 1∶1 mechanical test system for special-shaped shield lining with a large cross-section

作　　者：张子新[1] 朱叶艇[1,2] 朱雁飞 黄昕[1] 庄欠伟[2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海隧道工程股份有限公司,上海200233

出　　处：《岩石力学与工程学报》2017年第12期2895-2905,共11页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(41372276);上海市国资委企业技术创新和能级提升项目(2013017)~~

摘　　要：异形盾构管片由于特殊的断面型式,在应用到实际工程前须对其承载能力、力学特征和破坏模式进行研究。提出一种1∶1站立式原型异形盾构管片力学加载方法,构建可重构式的钢结构加载和数据采集平台以及基于PLC闭环控制理论的千斤顶液压控制系统。基于该试验系统,研究自重状态和覆土状态下异形管片结构内力和形变特征,揭示浅埋条件下管片结构自重对异形管片内力和形变的影响规律,获得所研究的异形盾构管片极限埋深为18.5 m,并通过对管片结构内外弧面裂缝分布规律的分析,发现了异形管片明显的弯矩传递现象。The bearing capacity,mechanical characteristics and damage mode of the special-shaped shield lining should be explored before application because of its special cross section. A 1∶1‘standing＇prototype loading method for special-shaped segmental lining was suggested,and a‘standing＇reconfigurable loading and data acquisition platform was developed with a hydraulic control system based on the closed-loop control theory of PLC. The internal force and deformation characteristics of the special-shaped shield lining structure under dead weight and overburden condition were analyzed respectively. The substantial influence of the structural self-weight on the internal force and deformation of the segmental lining under shallow overburden conditions was discovered. The limit burying depth of the lining structure was determined to be 18.5 m,and the analysis of the distribution of the cracks on the inner and outer surfaces of the segmental lining revealed the phenomenon of bending moment transfer.

关 键 词：隧道工程 异形盾构 原型试验 三维激光扫描仪 裂缝 弯矩传递 

分 类 号：U45[建筑科学—桥梁与隧道工程]