新建停车楼及匝道桥对既有轨道交通结构的影响研究

作者：任远敏¹廖伟¹,王洽亲²,刘翔³,卢杨益⁴,付邦萌³,徐洲²,胡佑平¹,李佳遥²

作者简介：

任远敏,高级工程师,E-mail:583107982@ qq. com

作者单位：

1. 中国建筑第四工程局有限公司,广东广州 510665; 2. 重庆机场集团有限公司,重庆 401120;3. 大连海事大学交通运输工程学院,辽宁大连 116026; 4. 中建四局第一建设有限公司,广东广州 510800

基金项目：

∗中建四局第一建设有限公司课题:复杂环境超深基坑智能化施工关键技术开发与应用(SJYGS-2021-KT-04)

摘要：

新建工程对邻近既有结构的变形控制及安全评估至关重要。依托重庆江北国际机场 T3B 航站楼及第四跑道工程项目,利用三维数值模拟方法分析新建停车楼和匝道桥对邻近既有轨道交通结构的影响,进而制定针对性的轨道交通保护措施。利用 MIDAS GTS NX 数值模拟软件,量化分析新建工程对既有轨道交通 15 号线施工通道和轨道交通 10 号线路基锚固桩挡墙、高架桥梁结构的位移影响,评估拟建项目和既有轨道交通结构的安全性。结果表明,新建停车楼与匝道桥对既有轨道交通结构的影响较小,风险可控。

关键词：停车楼;匝道桥;轨道交通;有限元分析;位移;安全

English：

The new project is very important for the deformation control and safety assessment of adjacentexisting structures. Based on the project of Chongqing Jiangbei International Airport T3B terminal and thefourth runway, the influence of the new parking building and ramp bridge on the adjacent existing railtransit structure is analyzed by 3D numerical simulation method, and then the corresponding rail transitprotection measures are formulated. Using MIDAS GTS NX numerical simulation software, thedisplacement influence of the new project on the anchor pile retaining wall and the viaduct structure of theexisting Rail Transit Line 15 construction channel and the Rail Transit Line 10 is quantitatively analyzed,and the safety of the proposed project and the existing rail transit structure is evaluated. The results showthat the new parking building and ramp bridge have little impact on the existing rail transit structure andthe risk is controllable.

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