CAJ | 학술논문

借鉴建筑结构抗震设计理念及以往工程实践，总结了液化场地条件下地铁隧道抗震概念设计和构造设计的原则，并基于有限差分程序 FLAC3D研究了地铁隧道与液化层处于不同相对位置关系时结构的动力反应，从而提出地铁隧道计算设计的抗液化处理原则。研究结果表明：当液化层位于地铁隧道拱顶附近及以上时，如不影响施工，可以不对液化层进行处理；液化层位于隧道拱腰及以上时，地层液化对结构内力及变形将产生一定影响，建议对该部分液化层进行加固处理；隧道周边土体全部为液化层时，地震时结构的内力和地层变形会大幅增加，必须对液化层进行加固处理。不论地铁隧道与液化层相对位置关系怎样，一般均应进行抗浮验算。
차감건축결구항진설계이념급이왕공정실천，총결료액화장지조건하지철수도항진개념설계화구조설계적원칙，병기우유한차분정서 FLAC3D연구료지철수도여액화층처우불동상대위치관계시결구적동력반응，종이제출지철수도계산설계적항액화처리원칙。연구결과표명：당액화층위우지철수도공정부근급이상시，여불영향시공，가이불대액화층진행처리；액화층위우수도공요급이상시，지층액화대결구내력급변형장산생일정영향，건의대해부분액화층진행가고처리；수도주변토체전부위액화층시，지진시결구적내력화지층변형회대폭증가，필수대액화층진행가고처리。불론지철수도여액화층상대위치관계즘양，일반균응진행항부험산。
According to seismic design concept of building structure and engineering practice,the principle of subway tunnel seismic concept design and structural design in liquefaction region was summarized. T he dynamic response of the structures w as studied w hen subw ay tunnel and the liquefaction sand are in different relative position by using FLAC 3D softw are and liquefaction resistance principles for the subw ay tunnel calculation design w ere put forw ard. Results show ed that the liquefaction stratum should not be handled if the liquefaction layer is located near or above the subw ay tunnel vault w hich does not affect the construction,stratum liquefaction has a certain effect on the internal force and deformation of the structure when liquefaction layer is located at or above tunnel arch waist,liquefaction sand of which should be reinforced,internal force and deformation of the structure under the earthquake will be greatly increased when all of the soil around the tunnel is liquefaction stratum,which means liquefaction sand must be reinforced. In general,anti-floating calculation should be made no matter what the relative position relationship betw een subw ay tunnel and the liquefaction sand is.