Bolt parameters of the track tunnel were simulated by using the finite software ANSYS in order to provide a theoretical basis for designing support parameters.

为了给现场锚杆支护参数的设计提供理论依据，采用有限元软件ANSYS对该轨道巷锚杆的支护参数进行研究。

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This paper analyzes the effect of different soil damping ratio, fastener stiffness and support stiffness to the dynamic responses of the track tunnel structures.

并且进一步分析了不同土体阻尼比、扣件刚度、支座刚度对轨道隧道结构的动力响应影响。

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Research conclusions: With the trains being-speed up, the transient pressure of double-track tunnel in the existing railway can not reach the standard of comfort.

研究结论：提速后，我国既有线上一些双线隧道的瞬变压力不能满足旅客乘车的“舒适度”标准。

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The Rail Accident Investigation Branch (RAIB) said the broken sections were part of an auger drill that had "penetrated the tunnel lining before falling on to the track".

BBC: Construction drill came from site above rail tunnel

Those teams will also be allowed unlimited out-of-season track testing, with no restrictions on the scale and speed of wind-tunnel testing.

BBC: F1 teams handed ?40m budget cap

Brickyard Crossing, which used to host a Senior PGA event, is truly one-of-a-kind: four holes play inside the infield of the oval track, often with loud cars running by on test laps, linked by a tunnel to the fourteen holes just outside the stadium.

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