摘要
依托深圳地铁5号线南延段某区间隧道下穿兴海大道立交工程,采用数值方法,对不同厚度初期支护情况下,进行桩基托换施工时衬砌内力分布情况进行了分析,得出:增加初期支护结构厚度能够有效降低支护结构的内力,必要时需要对隧道结构配筋进行加强。最后采用洞内托换施工技术保证隧道顺利通过兴海大道立交,验证了洞内托换方案的可行性。
In this paper,relying on a section of the south extension section of Shenzhen metro line 5 tunnel under Xinghai Avenue interchange,the internal force distribution of the lining during the underpinning construction of pile foundation under different thickness of initial support is analyzed by numerical method. It is concluded that increasing the thickness of initial support structure can effectively reduce the internal force of the supporting structure. Reinforcement of tunnel structure should be strengthened if necessary. Finally,the underpinning construction technology is adopted to ensure the smooth passage of the tunnel through Xinghai Avenue interchange,and the feasibility of the underpinning scheme in the tunnel is verified.
作者
宗秋雷
Zong Qiulei(China Sinohydro Bureau 7 Co.,Ltd.,Chengdu 610213,China)
出处
《山西建筑》
2020年第5期133-135,共3页
Shanxi Architecture
关键词
浅埋暗挖隧道
桩基托换
数值方法
轴力
弯矩
shallow buried tunnel
underpinning of pile foundation
numerical method
axial force
bending moment
