摘要
当隧道及地下工程穿越既有桥梁时,对桥梁结构的安全控制是非常必要的。隧道与上覆底层作为一个复杂系统处于动态作用之中,随着地层变形量的增大和松动范围的增加,地层的承载能力降低,从而导致临近桥梁结构变形增大,使其承受的附加荷载和附加变形增大。合理地确定桥梁结构的变形控制指标,并制定相应的工程措施,避免结构产生过大变形,是桥梁结构安全和稳定的保证。本文以某轨道交通下穿高速铁路为工程背景,对其进行检算并分析检算结果,提出相应的建议,为轨道交通下穿高速铁路段的设计提供理论支持。
It is necessary to control the safety of the bridge structure when the tunnel and underground project have to cross the existing bridge. As a complex system, the tunnel and the overlying bottom are in dynamic as the bearing capacity of the strata decreases with the increase of deformation and loosening range, which leads to increasing the structure deformation of the adjacent bridge as well as the additional load and deformation. It is the guarantee for safety and stability of bridge structure to reasonably determine the deformation control index of bridge structure and formulate corresponding engineering measures to avoid excessive deformation of bridge structure. In this paper, based on the engineering of a certain rail transit line under passing high-speed railway, the checking and calculating results of the rail are analyzed, and the corresponding suggestions are put forward to provide theoretical support for the design of rail transit section under passing high-speed railway.
作者
陈卓
Chen Zhuo(China Railway Fifth Survey and Design Institute Group Co. Ltd. , Beijing 102600, China;China Academy of Railway Sciences, Beijing 100081, China)
出处
《铁道建筑技术》
2018年第6期64-68,124,共6页
Railway Construction Technology
关键词
轨道交通
盾构区间
下穿高速铁路
rail transit
shield tunnelling section
under passing high-speed railway
