盾构隧道结构御灾性能评价弯矩传递系数的研究
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摘要
针对盾构隧道设计中因弯矩传递系数使用不当而造成的管片裂缝、管片错台、渗漏水等灾害现象,为实现结构设计阶段对灾害的主动控制,利用有限元软件ABAQUS建立均质圆环模型及梁-弹簧模型,研究错缝拼装盾构隧道在软土地区中隧道埋深、基床系数及接头相对刚度对弯矩传递系数的影响。通过分析数值模拟计算结果得到各因素对弯矩传递系数的影响规律与作用机理,提出弯矩传递系数的拟合计算公式,为软土地区盾构隧道结构防灾设计参数的确定提供依据。
In view of the disasters such as segment cracks,segment staggered platforms and leakage caused by improper use of bending moment transfer coefficient in shield tunnel design,in order to realize the active control of disasters in structural design stage,the homogeneous ring model and beam-spring model are established by using finite element software ABAQUS. The influence of tunnel depth,coefficient of subgrade reaction and relative stiffness of joint on bending moment transfer coefficient of staggered joint shield tunnels in soft soil area is studied. Through the analysis of numerical simulation results,the influence rules and mechanism of each factor on moment transfer coefficient are obtained,and the fitting calculation formula of bending moment transfer coefficient is put forward,which provides a basis for determining parameters in the disaster prevention design of shield tunnel structure in soft soil area.
In view of the disasters such as segment cracks,segment staggered platforms and leakage caused by improper use of bending moment transfer coefficient in shield tunnel design,in order to realize the active control of disasters in structural design stage,the homogeneous ring model and beam-spring model are established by using finite element software ABAQUS. The influence of tunnel depth,coefficient of subgrade reaction and relative stiffness of joint on bending moment transfer coefficient of staggered joint shield tunnels in soft soil area is studied. Through the analysis of numerical simulation results,the influence rules and mechanism of each factor on moment transfer coefficient are obtained,and the fitting calculation formula of bending moment transfer coefficient is put forward,which provides a basis for determining parameters in the disaster prevention design of shield tunnel structure in soft soil area.
引文
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[3]何川,封坤,孙齐,等.盾构隧道结构耐久性问题思考[J].隧道建设(中英文),2017,37(11):1351-1363.
[4]郦亮.某软土地区盾构隧道抢险监护研究[J].施工技术,2018,47(23):98-101.
[5]郑勇波,白廷辉,李晓军,等.通缝盾构隧道衬砌施工期三维力学特性数值研究[J].施工技术,2018,47(1):111-115.
[6]日本土木学会.隧道标准规范(盾构篇)及解说[M].朱伟,译.北京:中国建筑工业出版社,2001.
[7]黄宏伟,徐凌,严佳梁,等.盾构隧道横向刚度有效率研究[J].岩土工程学报,2006,28(1):11-18.
[8]黄钟晖.盾构法隧道错缝拼装衬砌受力机理的研究[D].上海:同济大学,2001.
[9]黄正荣,朱伟,梁精华.修正惯用法管片环弯曲刚度有效率η和弯矩提高率ξ的研究[J].工业建筑,2006,36(2):45-49.
[10]封坤,何川,夏松林.大断面盾构隧道结构横向刚度有效率的原型试验研究[J].岩土工程学报,2011,33(11):1750-1758.
[11] GUAN Z C,DENG T,WANG G,et al. Studies on the key parameters in segmental lining design[J]. Journal of rock mechanics and geotechnical engineering,2015,7(6):674-683.
[12]朱瑶宏,夏杨于雨,董子博,等.通用环错缝拼装盾构隧道结构设计计算参数研究[J].现代隧道技术,2018,55(4):114-121.
[13]张雨蒙,张姣龙,曹伟飚,等.盾构隧道新型衬砌结构受力性能与设计参数[J].现代隧道技术,2018,55(5):201-209.
[14]天津市勘察院.天津市地基土层序划分技术规程:DB/T 29—191—2009[S].2009.
[15]张稳军,宋晓龙,张新新.盾构隧道复合管片环向直螺栓接头抗弯性能的影响因素研究[J].施工技术,2017,46(S2):82-86.
[16]黄正荣.基于壳-弹簧模型的盾构衬砌管片受力特性研究[D].南京:河海大学,2007.