have they started construction of the secondary structure @ the Coventry/Kenilworth rail line _ one was scheduled to be built to allow access for agricultural vehicles next to the line _ looks like rebar in the base of the cutting _ moving forward still _ looking forward to seeing a finished complete realignment another good piece for the archive keep it going
BTW.. MEGA problem. is the tunnel boom effect, ie contained aerodynamic drag. So these structures have that in mind. In Japan.. they just viaduct or tunnel the whole lot so grade seperated and everything
![SAFEPLANET - ดาวเคราะห์ [ THE PLANET ]](http://i.ytimg.com/vi/4X1XL3I_k3c/mqdefault.jpg)
have they started construction of the secondary structure @ the Coventry/Kenilworth rail line _ one was scheduled to be built to allow access for agricultural vehicles next to the line _ looks like rebar in the base of the cutting _ moving forward still _ looking forward to seeing a finished complete realignment
another good piece for the archive
keep it going
BTW.. MEGA problem. is the tunnel boom effect, ie contained aerodynamic drag. So these structures have that in mind. In Japan.. they just viaduct or tunnel the whole lot so grade seperated and everything
IIRC HS2 tunnel dimensions and "porous portal" have been designed to alleviate any tunnel boom.