类矩形盾构隧道横向刚度有效率分析  

Analysis of transverse effective rigidity ratio of quasi-rectangular shield tunnel

作　　者：丁祖德[1] 付江 王志良[1] 郭永发[2] 李向红[3] DING Zude;FU Jiang;WANG Zhiliang;GUO Yongfa;LI Xianghong(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Kunming Survey,Design and Research Institute Company Limited of CREEC,Kunming 650200,China;Shanghai Tunnel Engineering Company Limited,Shanghai 200232,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]中铁二院昆明勘察设计研究院有限责任公司,昆明650200 [3]上海隧道工程股份有限公司,上海200232

出　　处：《铁道科学与工程学报》2018年第12期3181-3188,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51768028;51308270)

摘　　要：基于变形等效,建立类矩形盾构管片结构梁-接头模型,研究通缝、错缝拼装下类矩形盾构隧道横向刚度有效率。分析地基抗力系数、接头刚度比及接头数量对刚度有效率的影响,并建立了类矩形盾构隧道刚度有效率计算公式。研究结果表明:通缝、错缝拼装下管片结构横向刚度有效率平均值分别为0.47和0.54,错缝比通缝提高约15%。刚度有效率随地基抗力系数的增加呈非线性增长,随接头刚度比的增大呈线性增长,随接头数量的增加呈线性减小。类矩形盾构管片横向刚度有效率在0.3～0.8之间变化。建立的刚度有效率计算公式拟合精度高,可为类矩形盾构隧道结构计算提供依据。Based on the deformation equivalent,the effective rigidity ratio of quasi-rectangular shield segment with straight and staggered assembling was studied by using the beam-joint model.The influences of soil resistance coefficient,bending stiffness ratio and number of joints on the transverse effective rigidity ratio were analyzed.In addition,an evaluation formula of transverse effective rigidity ratio was established for quasi-rectangular shield tunnel.The results show that the average effective rigidity ratios of rectangular tunnel with straight and staggered assembling are 0.47 and 0.54 respectively,the staggered pattern is about 15%higher than the straight pattern.It increases nonlinearly with the increase of soil resistance coefficient;it increases linearly with the increase of bending stiffness ratio and decreases linearly with the increase of the number of joints.Its numerical value varies between 0.3 and 0.8.The formula of effective rigidity ratio has high precision and can be used in rectangular tunnel engineering practice.

关 键 词：类矩形盾构隧道 梁-接头模型 横向刚度有效率 影响因素 

分 类 号：U451[建筑科学—桥梁与隧道工程]