For this purpose the mechanism of forming a rock tunnel roof arch and reinforcement will be illustrated with the underground powerhouse in the Three Gorges Project.
为此，以三峡工程地下厂房拱顶设计为例，研究洞顶岩石拱结构形成及加固机理。
Because the first caving of work face haven't been finished, the tunnel roof and hole can not be used and gas often goes beyond the limit, so some measures must be taken.
由于工作面初次放顶没有完成，顶板巷道、顶板钻孔等不能发挥作用，常发生瓦斯超限现象，必须采取针对性措施。
Though the load analysis on the tunnel roof wall-rock in the fault footwall tunnel, this paper solves the problem of the tunnel support of tunneling through the great fault;
通过对断层下盘巷道顶板围岩的受力分析，解决了煤巷掘进过大断层的巷道支护问题；
Rescuers used props to stop the roof of the tunnel collapsing.
救援人员用支柱防止隧道顶塌陷。
In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins.
在隧道内黯淡的灯光下，页岩顶部30英尺长的石松化石遗迹就像鳄鱼皮般发出柔滑的光亮。
A photo from inside Indian Tunnel. The light is coming from holes in the roof where it collapsed over time, as will happen to all lava tubes.
来自印度的隧道内的照片。光洞是来自屋顶的地方，随着时间的崩溃，也将发生在所有的熔岩管。
Because there were roof collapses at several places along the lava tube that formed Indian Tunnel, it is possible to enter on one end and come out the other side.
因为有沿熔岩隧道管，形成了印度一些地方的屋顶坍塌，有可能进入一端出来的另一面。
The design features concrete canopy structures on both sides of the tunnel - creating a large enough surface area to realise sports fields on the roof of the tunnel section.
设计的特点是隧道两侧的混凝土雨棚结构——创建足够大的表面积来实现隧道部分的屋顶上的运动场。
They used waterproof cement to prevent water from seeping through the roof the tunnel.
他们用防水的水泥阻止水从坑道的顶上渗入。
The roof abscission layer is the biggest security hidden danger in bolting support tunnel.
顶板离层是锚杆支护巷道最大的安全隐患之一。
They used waterproof cement to prevent water from seeping through the roof of the tunnel.
他们用防水的水泥防止水从隧道顶部渗入。
The fluctuating pressure on the large-span complex roof of Guangzhou International Meeting and Exhibition Center were investigated by means of wind tunnel test, The test results have been analyzed.
介绍了复杂大跨屋面的脉动风压风洞试验研究方法和广州国际会议展览中心屋面脉动风压风洞试验的结果，并对结果进行了分析。
The coal seam tunnel of compound mudstone roof of large span is the tunnel that is violent out of shape, roof is easy falling and safeguard is very difficult.
大跨度复合泥岩顶板煤层巷道是围岩变形剧烈且顶板易冒落、极难维护的巷道。
Wind tunnel tests of a dome like roof were carried out by means of the synchronous multi-pressure scanning technique.
利用同步多点压力扫描技术对一个圆拱顶屋盖进行了风洞试验。
Wind loading on a hyperboloid roof of a stadium was conducted by means of wind tunnel test.
通过风洞模拟实验对双曲面形屋盖的平均风荷载特点进行了研究。
Taking the membrane structure roof of Hangzhou Swimming Stadium for example, wind load characters on large slope roof were studied by wind tunnel simulation.
以杭州游泳馆膜结构屋顶为例，本文通过风洞模拟实验的方法研究了大坡度膜结构屋面的风荷载特性。
"The mountains and the roof of the tunnel and everything shook," Villaroel says. "the mountain began to break up and we couldn't see anything, maybe 1 or 2 meters."
弗得罗说：“山体、隧道顶部以及所有的一切都在摇动，山体开始崩塌，在一两米之内我们什么也看不到了。”
Analyses the heat transfer process of the planted roof in hot-climate wind tunnel in the typical climate condition of Guangzhou by controlling the environment parameters in the wind tunnel.
通过控制和调节热气候风洞内的环境参数，分析了广州地区典型气候环境下佛甲草轻型种植屋面的传热过程。
How to guarantee the reliability of the suspension roof supported tunnel is a key link of the suspension roof support.
如何保证锚杆支护巷道的可靠性，是锚杆支护的关键环节。
The exact simulation of atmospheric boundary layer is not only the precondition of the wind tunnel test of the large span roof structures, but also a difficulty of its.
大气边界层的正确模拟是用风洞试验测量大跨屋面风荷载的前提，也是风洞试验研究的难点。
Based on the wind tunnel tests for large span cantilevered flat roof, the distributing characteristics of mean local shape factor and extreme local shape factor of the roof are studied.
本文结合一大跨悬挑平屋盖模型的风洞试验研究，分析了此类结构屋盖的平均局部体型系数和极值局部体型系数的分布特性；
The roof of the tunnel fell in .
隧道顶部塌了下来。
The roof of the tunnel caved in (on the workmen).
屋顶是什么时候坍塌的？
Meanwhile, the pipe-roof grouting and pile anchoring method have been adopted also to strengthen the bedding strata of the large span tunnel.
同时对浅埋、富水和地质顺层地段分别采用管棚注浆和锚固桩加固的方法进行了处理。
Wind tunnel test of Guangzhou air-mail processing center was carried out to investigate the internal wind effect for long-span roof structure with openings.
结合广州航空邮件处理中心风洞试验，研究了开孔大跨屋盖结构的内部风效应。
The roof separation layer is the biggest security hidden danger in bolt support tunnel.
顶板离层是锚杆支护巷道最大的安全隐患之一。
Taking an open membrane roof, which covers the central square of Great Shanghai Pedestrian Street in Zhengzhou City, as an example, a wind tunnel test on a rigid model was carried out.
以郑州大上海步行街中心广场膜结构屋盖为工程背景，进行了刚性模型的同步测压试验。
Roof falling of rock bolting supported tunnel is usually paroxysmal in a big area, so safety monitoring is of great importance.
锚杆支护巷道顶板冒落具有突发性和冒落面积大的特点，安全监测非常必要。
Roof falling of rock bolting supported tunnel is usually paroxysmal in a big area, so safety monitoring is of great importance.
锚杆支护巷道顶板冒落具有突发性和冒落面积大的特点，安全监测非常必要。
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