铁路运行安全与房建基坑支护设计技术要点分析  

Analysis on Key points of Railway Operation Safety and Foundation Pit Support Design in Building Construction

作　　者：俞明贤 陈浩 Yu Ming-xian;Chen Hao

机构地区：[1]中建二局第三建筑工程有限公司,北京100070

出　　处：《建筑技术开发》2021年第24期87-88,共2页Building Technology Development

基　　金：国家自然科学基金(41372289)。

摘　　要：为了保证邻近铁路的土建基坑阶段施工周期内铁路运行正常和运行安全,结合南京某房建项目在基坑支护设计阶段通过建立铁路路基三维动载模型来对基坑施工阶段的铁路运行安全进行评估,模拟过程中不断对基坑支护桩的钢筋配筋、支护桩直径、支护桩悬臂长度、支护桩桩间距等多方位的设计深化调整来达到铁路运行安全所需参数。其设计经验可供类似工况项目参考。In order to ensure railway operation normal and safe operation during the construction period of foundation pit adjacent railway,combining with a Nanjing housing project in foundation pit supporting design stage,railway running safety during construction of the foundation pit is evaluated through the establishment of railway roadbed 3D dynamic load model,in the process of simulation multidirectional design deepened adjustment of continuous steel reinforcement,pile diameter,pile cantilever length,supporting pile spacing of foundation pit supporting pile is carried out to achieve parameters required by safe operation of railway.Its design experience can be used as reference for similar working condition projects.

关 键 词：邻近铁路基坑施工 设计深化 三维动载模型 安全评估 

分 类 号：TU942[建筑科学—建筑技术科学]