1) defence tunnel of circular arch and vertical wall
圆拱直墙式防护隧道
2) straight arch tunnel wall
圆拱直墙式隧道
3) tunnel with vertical side walls
直墙式隧道
4) curved wall twin arched tunnel
曲墙式双联拱隧道
1.
On construction of M-shape curved wall twin arched tunnel on highway from Taiyuan to Changzhi
太长高速M形曲墙式双联拱隧道施工
5) the curved middle wall twin-arch tunnel
曲中墙连拱隧道
1.
At present, there is a lack of construction technology research on the curved middle wall twin-arch tunnel.
曲中墙连拱隧道,是在对当前连拱隧道修建过程中进行总结论证基础上提出的一种新型构造形式。
6) semicircle-tunnel
半圆拱形隧道
1.
Study on the influence to the cutoff frequency of semicircle-tunnel from the train;
列车对半圆拱形隧道中电磁波截止频率的影响
补充资料：防护墙(protectivewall)
【防护墙】(protectivewall)指围绕核辐射强烈的区域（如原子核反应堆、加速器等的周围）使人体免受过量的`\gamma`射线或中子辐照和屏蔽物。通常用厚实的混凝土墙来减弱`\gamma`辐照，用水层或含硼物质来减弱中子辐照。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条