加工工艺对盾构隧道环间锚式接头受力影响的数值研究  

Numerical Study on Influence of Manufacturing Process on Mechanical Properties of Longitudinal Anchor Joint for Shield Tunnel

作　　者：张稳军[1,2] 张高乐[1] 苏忍[1] 金明明[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《隧道建设》2016年第2期150-157,共8页Tunnel Construction

基　　金：国家自然科学基金面上项目(51378342);高等学校博士学科点专项科研基金新教师类资助课题(20120032120050)

摘　　要：为研究加工工艺对盾构隧道环间锚式接头受力特性的影响,基于锚式接头荷载试验,采用ABAQUS有限元软件建立锚式接头的精细化模型。首先,通过与试验结果进行比较,验证数值模型的合理性与可靠性,并分析得出锚式接头各部件间的摩擦因数参考值。其次,研究锚式接头在拼装过程中所需的压力、接头达到破坏荷载时的张开量随摩擦因数和套环壁厚与插入间隙尺寸差的变化规律。最后,数值分析结果表明：部件间的摩擦因数参考值取0.50比较合理;为保证锚式接头正常工作,加工时部件间的摩擦因数应为0.46~0.52,套环壁厚与插入间隙尺寸差应为-0.05~0.01 mm;锚式接头在加工过程中的加工精度要求较高。A refined model of anchor joint is established by means of ABAQUS finite element software based on loading test of anchor joint,so as to study the influence of manufacturing process on mechanical properties of longitudinal anchor joint for shield tunnel. The rationality and reliability of the numerical model is testified by means of comparing with testing results. The reference value of friction coefficient of anchor joint is obtained. The relationship among stress needed for installation of anchor joint,opening amount of anchor joint when failure load reached,friction coefficient,thickness of sleeve and inserting size is studied. The results indicate that： 1） The reference value of friction coefficient should be 0. 50. 2） The reference values of friction coefficient for normal operation of anchor joint should be 0. 46- 0. 52 and the reference values of the difference between sleeve thickness and inserting size should be- 0. 05- 0. 01 mm. 3）High accuracy should be guaranteed during the manufacturing process of anchor joint. The study results can provide technical reference for design and manufacture of anchor joint.

关 键 词：盾构隧道 锚式接头 数值研究 加工工艺 受力特性 

分 类 号：U45[建筑科学—桥梁与隧道工程]