特长公路明挖隧道废气排放及结构方案研究  

Structural Study of Exhaust Ventilation System of Open-cut Super-long Highway Tunnel

作　　者：常春雨 张佳 褚方平 Chang Chunyu;Zhang Jia;Chu Fangping(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,200092

出　　处：《特种结构》2023年第5期86-90,共5页Special Structures

摘　　要：以海南G98环岛高速崖州段特长明挖隧道工程为背景,基于规划的周边环境对废气排放要求的限制,提出了结构顶板设置低风井分散排放废气的方案,通过模型分析评估得出该方案可有效减少洞口集中排放造成的环境污染。顶板设置风井后结构整体受力发生变化,建立空间模型进行分析,对比相同覆土条件下的平面框架计算结果,结构构件尺寸及配筋未显著提高,表明该方案经济性及功能性较好。随着城市建设规模的快速推进,未来地面道路下沉式改造将逐渐增多,该方案可为类似工程提供一定参考。To meet the environmental requirements for exhaust emissions,a method has been proposed in a super-long open-cut tunnel project,Yazhou section of the G98 Ring Expressway in Hainan.This method involves the installation of low air shafts on the roof to disperse exhaust emissions.Model analysis and evaluation have shown that this method can effectively reduce environmental pollution caused by concentrated discharge from the portal.The overall stress of the structure changes when air shafts are installed on the roof,and spatial models are established for analysis.Comparison of the calculation results of frame structures under the same overlying soil conditions indicates that the frame structural sizes and reinforcements have not significantly increased.It demonstrates that this method is both economically and functionally sound.With the rapid advancement of urban construction scale,there will be an increasing number of sunken road renovations in the future.This method provides valuable references for similar projects.

关 键 词：特长隧道 低风井 分散排放 空间模型分析 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]