基于螺栓-凹凸榫连接的地铁盾构隧道管片环缝接头刚度分析及应用

doi:10.3973/j.issn.2096-4498.2020.01.003

中国科学引文数据库（CSCD）来源期刊
中文核心期刊中文科技核心期刊
Scopus RCCSE中国核心学术期刊
美国EBSCO数据库俄罗斯《文摘杂志》
《日本科学技术振兴机构数据库（中国）》

隧道建设（中英文） ›› 2020, Vol. 40 ›› Issue (1): 19-27.DOI: 10.3973/j.issn.2096-4498.2020.01.003

基于螺栓-凹凸榫连接的地铁盾构隧道管片环缝接头刚度分析及应用

桑运龙^{1, 2}, 刘学增^{2, 3,} ^∗, 张　强^{1, 4}

(1. 上海同岩土木工程科技股份有限公司, 上海　 200092; 2. 同济大学土木信息技术教育部工程研究中心, 上海　 200092; 3. 同济大学土木工程学院, 上海　 200092; 4. 上海地下基础设施安全检测与养护装备工程技术研究中心, 上海　 200092)

收稿日期:2019-04-03 出版日期:2020-01-20 发布日期:2020-04-04
作者简介:桑运龙(1988—),男,山东泰安人,2013年毕业于同济大学,隧道及地下建筑工程专业,硕士,工程师,现从事隧道病害检测、结构健康监测等领域研究工作。 E-mail: hiker_1@163.com。 ?通信作者: 刘学增, E-mail: xuezengl@263.net。
基金资助:
国家重点基础研究发展计划(“973”计划)项目(2015CB057806); 铁四院科技研究开发计划课题(2018K121); 南京市公共工程建设中心建设工程课题(MT-2018-Z038); 国家自然科学基金项目(51878497)

(1. Shanghai Tongyan Civil Engineering Technology Corp., Ltd., Shanghai 200092, China; 2. Civil Engineering Information Technology Research Center, Ministry of Education, Tongji University, Shanghai 200092, China; 3. College of Civil Engineering, Tongji University, Shanghai 200092, China; 4. Shanghai Underground Infrastructure Safety Testing and Maintenance Equipment Engineering Technology Research Center, Shanghai 200092, China)

SANG Yunlong^{1, 2}, LIU Xuezeng^{2, 3,} ^∗, ZHANG Qiang^{1, 4}

(1. Shanghai Tongyan Civil Engineering Technology Corp., Ltd., Shanghai 200092, China; 2. Civil Engineering Information Technology Research Center, Ministry of Education, Tongji University, Shanghai 200092, China; 3. College of Civil Engineering, Tongji University, Shanghai 200092, China; 4. Shanghai Underground Infrastructure Safety Testing and Maintenance Equipment Engineering Technology Research Center, Shanghai 200092, China)

Received:2019-04-03 Online:2020-01-20 Published:2020-04-04

摘要/Abstract

摘要： : 为研究盾构隧道纵向计算模型中螺栓-凹凸榫型式环缝接头刚度的非线性力学特性,分别建立管片环缝张开与错台模式下的环缝接头计算模型,通过分析不同环缝变形状态下接头连接构件力学特征,得到环缝抗拉和抗剪刚度的非线性规律;环缝接头采用非线性抗拉、抗剪弹簧模拟,构建基于三维实体-非线性弹簧单元的盾构隧道纵向沉降计算模型,并将其用于评价地面堆载对厦门地铁2号线滨海区段管片结构安全的影响。结果表明,对于外径6.7 m、内径6 m、环宽1.5 m、环缝由M30螺栓连接的盾构隧道: 1)环缝张开超过1.78 mm时,接头抗拉刚度降低为设计值的1%; 张开超过10.2 mm时,可认为抗拉失效。 2)环缝错台小于6 mm 时,抗剪刚度基本不变; 错台超过9.7 mm后,抗剪刚度降低至约为设计值的25%; 错台超过30 mm时,可认为抗剪失效。 3)隧道轴线方向的地表超载范围为 d,管片纵向变形受影响范围为±3d,轴线50环管片差异沉降小于23 mm时,可满足曲率半径不小于《城市轨道交通结构安全保护技术规范》控制值15 000 m。

关键词: 盾构隧道, 环缝接头, 非线性弹簧, 控制指标

Abstract: In order to study the nonlinear mechanical properties of the joint stiffness with bolt-concave and convex tenon type in the longitudinal calculation model of shield tunnel, the calculation models of the annular joints under the opening mode and the dislocation mode are established respectively. By analyzing the mechanical characteristics of the joints under different deformation conditions, the nonlinear laws of tensile and shear stiffness of the joints are obtained. The calculation model of shield tunnel longitudinal settlement based on three-dimensional entity-nonlinear spring element is constructed by using nonlinear tensile and shear spring simulation of annular joint; and the model is used to evaluate the influence of surface overload on the safety of segment structure in coastal area of Xiamen Metro Line No. 2. The results show that for the shield tunnel of which the outer diameter is 6.7 m, the inner diameter is 6 m, the ring width is 1.5 m, and the annular joint is connected with M30 bolts: (1) When the opening of the annular joint exceeds 1.78 mm, the tensile stiffness of the joint decreases to 1% of the designed value; and when the opening of the joint exceeds 10.2 mm, the tensile failure can be considered. (2) The shear stiffness is almost unchanged when the amount of dislocation is less than 6 mm, and the shear stiffness decreases to about 25% of the designed value when the amount of dislocation is over 9.7 mm; when the amount of dislocation is over 30 mm, the shear failure can be considered. (3) When the overloading range of the tunnel axis is d, the longitudinal deformation of the segment is affected by ±3d, and the differential settlement of the 50-ring segment of the tunnel axis is less than 23 mm, the curvature radius is not less than 15 000 m.

Key words: shield tunnel, annular joint, nonlinear spring, controlling indicators

中图分类号:

U 45

桑运龙, 刘学增, 张强. 基于螺栓-凹凸榫连接的地铁盾构隧道管片环缝接头刚度分析及应用 [J]. 隧道建设, 2020, 40(1): 19-27.

SANG Yunlong, LIU Xuezeng, ZHANG Qiang. (1. Shanghai Tongyan Civil Engineering Technology Corp., Ltd., Shanghai 200092, China; 2. Civil Engineering Information Technology Research Center, Ministry of Education, Tongji University, Shanghai 200092, China; 3. College of Civil Engineering, Tongji University, Shanghai 200092, China; 4. Shanghai Underground Infrastructure Safety Testing and Maintenance Equipment Engineering Technology Research Center, Shanghai 200092, China) [J]. Tunnel Construction, 2020, 40(1): 19-27.

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基于螺栓-凹凸榫连接的地铁盾构隧道管片环缝接头刚度分析及应用

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