CAJ | 학술논문

通过对南宁地铁1、2号线盾构隧道下穿铁路股道及火车站站房现场的调查、了解,依据各自的环境条件分别建立二维、三维数值模型,选取适当的单元类型进行模拟计算.发现采用洞内注浆加固配合地面加固的方式可使股道最大沉降减小18.9 mm,且使沉降槽缩小60 m.对火车站站房下的隧道采用洞内加固可保证影响区范围内的最大桩基沉降差约4.5 mm,远小于过规范规定的允许值.这就确保了盾构隧道下穿南宁火车站站房及铁路股道的安全,为今后类似工程的数值模拟分析提供经验.
통과대남저지철1、2호선순구수도하천철로고도급화차참참방현장적조사、료해,의거각자적배경조건분별건립이유、삼유수치모형,선취괄당적단원류형진행모의계산.발현채용동내주장가고배합지면가고적방식가사고도최대침강감소18.9 mm,차사침강조축소60 m.대화차참참방하적수도채용동내가고가보증영향구범위내적최대장기침강차약4.5 mm,원소우과규범규정적윤허치.저취학보료순구수도하천남저화차참참방급철로고도적안전,위금후유사공정적수치모의분석제공경험.
Through the research and analysis of field investigation for shield tunnel of Nanning Metro Line # 1 and #2 which are underneath track and train station, based on two-dimensional and three-dimensional numerical mod-els established under each corresponding environmental condition and stimulations of appropriate unit type, this study finds out that the usage of both inside grouting reinforcement and the outside ground reinforcement can help to reduce the maximum track settlement by 18.9 mm and the settling tank by 60 m. The maximum differential set-tlement of pile foundation can be controlled in scope of 4.5 mm for affected area by using grouting reinforcement to build the tunnel which is underneath the train station. It is far less than the permissible value required by regula-tions. It ensures the safety of shield tunnel passing through under Nanning train station and train track. Moreover, it provides valuable experience for numerical simulation of similar projects in the future.