邻近既有线厚垃圾层条件下组合支架设计关键技术

Key Technology of Combined Bracket Design under Deep Junk Layer near the Existing Line

基于对传统支架体系的分析,针对邻近既有线、地基承载力差、支撑吨位大等现场问题优化出一种组合支架支撑体系,解决了复杂条件下高速铁路现浇连续梁支架设计的技术难题,并利用有限元对该支架体系进行可行性分析,对施工控制难点进行了简析,确保了不利地质条件下转体桥临近既有线施工安全及转体后的成桥线形。

Based on the traditional support system analysis,a combined support system is optimized for the field problems such as the nearby existing line,the foundation bearing capacity,the large support tonnage and so on,which solves the technical problems of the design of the cast-in-place beam in the high-speed railway under the complicated condition.And the support system feasibility is analyzed by finite element method,after a brief analysis of the construction control difficulties,the construction safety of the rotating bridge near the existing railway under the unfavorable geological conditions and the bridge alignment after the rotation are ensured.