城市综合交通枢纽框架隧道设计  

Design of the underpass framework tunnel in urban transportation junction

作　　者：陈勇[1] 袁竹[1] 何昌国[1] Chen Yong;Yuan Zhu;He Changguo(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu Sichuan 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《山西建筑》2024年第7期148-153,共6页Shanxi Architecture

摘　　要：长距离下穿综合交通枢纽,面临近接轨道交通、各等级路网、管网、结构空间受限、地下水位变化大等问题。以成都市红光大道犀浦双铁站下穿隧道为例,对长距离下穿综合交通枢纽框架隧道的设计进行梳理与总结,其主要研究内容和结论如下:为解决长距离下穿综合交通枢纽所面临的结构横向宽度通长受限、竖向高度局部受限问题,设计采用“局部加高风机衬砌和加深集水井”的限界竖向延伸设计思路和主体结构分段原则;为得出各控制部位最不利配筋,需对比多种荷载组合工况得到其配筋面积包络图;结构各部位的最不利配筋量差别较大,为兼顾结构的安全和经济,按非对称配筋原则,对控制性位置进行局部加强配筋;框架隧道上跨规划地铁段时需考虑地铁开挖造成的土体卸载和地下水浮力作用问题,采取设置板凳桩跨越地铁区间同时加强底板纵向配筋的措施,土体卸载和地下水浮力分别控制底板上、下部最不利配筋。For long distance under-passing the comprehensive transportation hub,face many problems such as approaching rail transit,multi-level road network and subterranean network,confined space,large amplitude of underground water level.Taking the tunnel under-passing Xipu rail-subway integrated station of Hongguang thoroughfare in Chengdu as an example,the design of framework tunnel long distance under-passing the comprehensive transportation hub is combed and summarized.The main research contents and conclusions are as follows:In order to solve the problems of long-distance through the comprehensive transport hub such as the structure of the lateral width of the limited length,the vertical height of the local constraints,the design adopts the concept of vertical extension gabarite as“local heightening jet fan lining and deepening pump well”and principle of the main structure section.In order to obtain the most unfavorable reinforcements for each control site,it is necessary to compare the multiple load combination conditions to obtain an envelope diagram of reinforcement area.The most unfavorable amount of reinforcement in various parts of the structure differs greatly.In order to take into account the safety and economy of the structure,according to the principle of asymmetric reinforcement,local reinforcement of the control position is carried out.The problem of soil unloading and groundwater buoyancy caused by subway excavation must be taken into consideration when the frame tunnel crossing over the planning subway,the measures such as install bench pile acrossing over the planning subway section and strengthen bottom longitudinal reinforcement,are formulated,soil unloading and groundwater buoyancy control the most unfavorable reinforcements in the upper and lower parts of the soleplate.

关 键 词：城市交通枢纽 框架隧道 主体结构分段 限界竖向延伸 配筋包络图 上跨规划地铁 

分 类 号：TU984.191[建筑科学—城市规划与设计]