NASTRAN, the model was build and the distribution of displacement and stress for the top of tunnel was analyzed, and these were by contrast to RFPA2D simulation results which was the software of independent development.
NASTRAN三维模拟软件建模并计算分析这段隧道顶板的位移和应力分布情况,然后同本中心自主开发的RFPA2D软件的模拟结果进行对比。
Study on Full Face Construction Technology of a Super Shallow Box-type Tunnel Under Urban Trunk Road
城市干道下超浅埋平顶隧道全断面修建技术研究
Shallow buried excavation construction skill of large span tunnel with flat top and straight wall
平顶直墙大跨度隧道浅埋暗挖施工技术
On application of horizontal rotary jet grouting pile in tunnel vault support in Suancigou
水平旋喷桩在酸刺沟隧道拱顶支护中的应用
Optimized Design of Advance Pipe-roofing for Tunnels with Flat Roof and Vertical Walls
管棚超前支护在平顶直墙隧道中的优化设计
The roof of the tunnel caved in (on the workmen).
隧道顶坍塌（压住工人）.
The roof of the tunnel caved in.
隧道的顶部塌陷了。
The roof of the tunnel fell in.
隧道顶部塌了下来.
water seeping through the roof of the tunnel
从隧道顶部渗出的水
Study on Natural Ventilation of Urban Tunnel with Upper Vents;
市政公路隧道顶部开孔自然通风研究
The ventilating and methane monitoring technology of Yunding high methane tunnel
云顶高瓦斯隧道通风及瓦斯监测技术
Modeling on temperature field of arch crown in long tunnel fires
长隧道火灾中拱顶温度场的数值模拟
Numerical Si mulation of Smoke Pervasion in Tunnel Fire Affected by Ceiling Flue
顶棚烟道对隧道火灾烟流蔓延作用的数值分析
It is 19 kilometers long and at one point it's more than 2100 meters under the crest of the mountain.
有19公里长，隧道的某一处距峰顶有2100多公尺深。
The roof of the new tunnel hasn't been properly supported; it shows signs of falling in.
新隧道的顶部支撑得不好, 已显出坍塌的迹象。
A Model Test Study on Influence of Top Karst Cave on Stability of the Surrounding Rock-mass during Tunnel Construction
隧道顶部溶洞影响围岩稳定性的模型试验研究
Investigation of Nature Ventilation in Subway Tunnel with upper Vents
顶部开孔地铁区间隧道自然通风计算研究
Settelment Monitoring and Rule Research of Rock Tunnel Roof Rock Massin the Shallow Tunnel Excavation
浅埋隧道开挖洞顶岩体沉降监测及规律研究
The critical technology monitoring of a tunnel ground surface and arch crown settlement control
某隧道地表及拱顶沉降控制关键技术及监控