摘要
文章依托国道G317理县薛城镇磨子沟棚洞工程,结合棚洞现场实际情况,利用ABAQUS有限元软件模拟了矩形棚洞在边坡落石冲击荷载作用下的物理力学响应,分析了狭窄地形下三种矩形栅洞结构的抗落石冲击能力。结果表明:在落石荷载作用下,封闭式矩形棚洞结构的位移及应力响应最小,其次是开窗式矩形棚洞,响应最大的为柱式矩形棚洞;开窗式矩形棚洞与封闭式矩形棚洞结构的最大应力值相差较小,而柱式矩形棚洞结构的最大应力值为封闭式矩形棚洞的1.48倍,故柱式矩形棚洞结构抗落石荷载的承载能力远小于封闭式和开窗式矩形棚洞。
Based on the Mozigou shed tunnel project of national road G317 in Xuechen town,Li county,combined with the actual situation of the shed tunnels,this paper simulated the physical and mechanical response of the rectangular shed tunnels under the rockfall impact load of the slope by using the finite element software ABAQUS,and analyzed the rockfall impact resistance of three kinds of rectangular shed tunnel structures in narrow terrain.The results show that:under the rockfall load,the displacement and stress response of closed rectangular shed tunnel is the smallest,followed by that of the rectangular shed tunnel with holes,and the rectangular pillar shed tunnel structure has the largest response.The maximum stress value of the rectangular shed tunnel with holes is not much different from that of the closed rectangular shed tunnel,while the maximum stress value of the rectangular pillar shed tunnel is 1.48 times of that of the closed rectangular shed tunnel,so the bearing capacity of the rectangular pillar shed tunnel structure is far less than that of the closed rectangular shed tunnel and rectangular shed tunnel with holes.
作者
吴聪
胡志远
滕振楠
田志宇
WU Cong;HU Zhiyuan;TENG Zhennan;TIAN Zhiyu(SiGhuan Provincial Department of Transportation Highway Planning Survey and Design Institute,Chengdu 610041)
出处
《现代隧道技术》
EI
CSCD
北大核心
2019年第S02期179-183,共5页
Modern Tunnelling Technology
关键词
公路隧道
矩形棚洞
落石
数值分析
Highway tunnel
Rectangular shed tunnel
Rockfall
Numerical analysis
