CAJ | 학술논문

在高水压条件下施工水下盾构隧道,渗流场对于结构及围岩应力场有很大影响.结合重庆主排水过江盾构隧道的修建,针对不同水压情况下的盾构隧道,采用有限元法对围岩及结构的渗流场和应力场进行耦合分析,获得施工期管片应力、位移及孔隙水压力分布.重点研究了管片的水压力分布规律,并与现场试验进行相互验证.结果表明:耦合效应下隧道管片需要承担更大的拉力,在设计中应按更不利工况进行配筋.所得结论为类似工程的设计施工提供有了益参考及依据.
재고수압조건하시공수하순구수도,삼류장대우결구급위암응력장유흔대영향.결합중경주배수과강순구수도적수건,침대불동수압정황하적순구수도,채용유한원법대위암급결구적삼류장화응력장진행우합분석,획득시공기관편응력、위이급공극수압력분포.중점연구료관편적수압력분포규률,병여현장시험진행상호험증.결과표명:우합효응하수도관편수요승담경대적랍력,재설계중응안경불리공황진행배근.소득결론위유사공정적설계시공제공유료익삼고급의거.
Seepage field has a great influence on stress field of shield tunnel structure during construction under high water pressure. The FEM has been used to analyze the coupling seepage field and stress field under different water pressures based on the drainage tunnel project crossing the Yangtze River at the downtown of Chongqing city. The segment's stress distribution, displacements and pore pressure distributions are calculated. Water pressure distributing rule has been studied emphatically; and the results are verified by the in-situ data. The calculation show that segments need to take more tensile force under coupling effect. The achieved results offer helpful reference and basis for design and construction of this project.