本实用新型公开的安全拱架，主要用于覆盖农膜时的支撑物。
The utility model discloses a safety arch centering, which is mainly used for a support for covering an agricultural film.
同时结合有限元数值分析技术，对小金口双连拱隧道的施工过程进行了监控，确保了隧道施工过程中围岩的稳定及支护结构的安全合理。
By the field monitoring measurement and the applying of FEM, we can monitor the construction procedure to ensure the stability of the surrounding rock and the safety of lining.
其最大特点是将空中焊接横联作业转化为地面作业，能确保施工安全和拱肋拼装质量。
Its most outstanding characteristic is to transform transverse bracing welding from air to ground, thus securing construction and ensuring assembly quality.
软土中的机械预切槽法是超前支护的一种，在预筑拱的保护下可以安全高效地开挖隧道。
The Mechanical pre-cutting method used in soft ground is a kind of preparative support, it allows tunnel excavation work to be conducted efficiently under the safe pre-lining.
为保证列车行驶的平稳和安全性，高速铁路桥梁的上拱度有十分严格的限值。
To ensure the stableness and security of the train, the high speed railway's bridge camber must be extremely limited.
混凝土大坝的变形，尤其是坝基和拱座的变形，是衡量工程安全与否的一个重要指标。
Concrete dam displacement, especial for dam foundation or arch support, is an important target to judge the safety.
清堵器具有结构简单、冲击力大、安全、节能、自动控制、操作简单、不损伤仓斗等基本优点，是目前最理想的破拱助流装置。
Air cannon has features that simple structure, huge impact, security, energy control, simple operation and non-damaging storehouse. It is the most ideal device to prevent bent and assist flow.
数目众多的纵、横向裂缝已大大削弱了混凝土顶拱的强度、刚度及稳定性，危及地下厂房的安全运行。
With the influence of so many cracks, the strength, stiffness and stability of the umbrella arch is decreased greatly, which endangers the operation of underground power house.
该技术最大特点是将空中焊接横连作业转化为地面作业，能确保施工安全和拱肋拼装质量。
The main features of this technology is that the hanging welding jobs was changed to be done on ground to ensure the construction security and assembling quality.
但在拱肋完全合拢之前，整体结构是一个悬吊体系，其安全控制相当重要。
The whole structure was the suspension system before the completely shut of arch rib. The safety control is very important.
暗挖区间隧道通过采用超前探测、增设临时仰拱、袖阀管、锁脚锚管等技术措施，安全、顺利完成了北四环路和北辰桥段的施工。
By adopting some technology of advanced detection, adding temporary invert, sleeve valve pipe and lock foot bolts, the construction of the tunnel is completed safely and successfully.
拱系结构的稳定性分析用单拱或少量单元的拱系子结构代替并不一定偏于安全。
It is not safe to justify the stability of whole arch-structure by means of the stability of the single arch or the sub-arch-structure.
拱系结构的稳定性分析用单拱或少量单元的拱系子结构代替并不一定偏于安全。
It is not safe to justify the stability of whole arch-structure by means of the stability of the single arch or the sub-arch-structure.
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