查询词典 pioneer tunnel

The dynamic response of the large crosssection shallow tunnels in new sand loess under viscouselastic boundary is calculated by means of transient dynamic FEM so as to find out the weak points of the lining and the stress, deformation and safety of the tunnel structure.

对大断面浅埋砂质新黄土隧道，利用瞬态动力学有限元方法，计算了粘弹性边界条件下，隧道在Ⅷ度地震荷载作用下的动力响应，找出衬砌的薄弱部位和结构的受力、变形及安全性，为设计提供指导和参考作用。

Taking the construction of Xiangshan tunnel on LongyanXiamen railway in Fujian province as an example, the author summarizes the experience in inclined shaft crosssection selection, transportation system determination and transportation capacity evaluation in this paper.

通过福建龙岩至厦门铁路象山隧道的施工实践进行总结，吸取施工过程中的经验和教训，力图在斜井断面选择、运输方案确定、运输能力的评估等方面进行总结和探讨。

It is stated, on basis of analysis on the blasting theories at home and abroad, that parameters, such as vibration velocity and vibration time should be introduced to analyze the influence of blasting on the surrounding structures. In the paper, the influence imposed by the blasting excavation of tunnels with extralarge crosssections is simulated, with Guanziling tunnel on LanzhouChongqing railway as an example.

在分析国内外爆破振动理论的基础上阐述要根据具体的工况，有针对性地引入振动速度、振动时间等多种参数进行分析，且以兰渝线关子岭特大断面隧道爆破为依托，应用数值分析方法，模拟特大断面隧道爆破振动对周边建筑物的影响。

The key of maintaining the tunnel stability lies on how to deal with the advance core soil ahead of working face, which is obtained on basis of analysis on the problems in high speed railway tunnels with big crosssections in soft surrounding rock or soil. Fullface prereinforcing method by fiberglass bolts can enhance the equivalent rigidity of the advance core soil and control the deformation of the advance core soil, so that arch effect can play its role naturally and assure the excavation safety.

总结分析了目前高速铁路大断面软弱围岩或土质隧道施工中存在的问题，认为如何处理好掌子面前方的&待挖核心体&是控制此类隧道整体稳定性的关键，运用沿隧道纵向全断面预加固的易切削玻璃纤维锚杆来提高&待挖核心体&的等效刚度，控制&待挖核心体&的变形，使得隧道周边的拱效应能自然发挥作用，可以保证隧道能够全断面安全、顺利开挖掘进。

Moreover, through monitoring analysis of this tunnel, time vs. the stress curve of secondary lining is consistent with the finite element analysis results.

另外，通过对该隧道现场监控量测分析发现，二衬的受力－历时曲线与有限元分析相吻合。

Waist and bottom hem shock cords - There is a black nylon 'tunnel' around the waist inside, which houses the elastic drawcord with cord locks at both ends.

腰部和底部的减震绳——有一条黑色尼龙&隧道&环绕在腰部内部，把两边弹性拉绳和减震绳覆盖起来。

Lastly, the time series analysis and time series data mining system of SAS/ETS are used to conduct tendency forecasting of displacement of the Longtan Water Power Project underground plant observation tunnel rock.

应用SAS的ETS时序分析与挖掘系统对龙滩水电站地下厂房模型洞的位移观测资料进行了岩体的位移变化趋势预测。

The only condition under which the preselector made no difference is when measurements are made with a high tunnel-diode gain.

1只有在用高增益的隧道二极管来测试时，用不用预选器才显得无关紧要。

In order to obtain the fire parameters of cable tunnels and study the time-dependent and spacedependent distribution of the air temperatures and fire smokes inside the tunnels, cable tunnel model is established and fullscale fire simulation is made by means of FDS developed by NIST (National Institute of Standards and Technology). The distribution pattern of the smoke density, oxygen density and temperature are obtained by means of processing and analysis of the experiment data, so as to provide some effective methods for fire-fighting, rescuing and escaping. Furthermore, some suggestion is made on fire prevention.

为了获取电缆隧道火灾参数，研究隧道内空气温度及火灾烟雾浓度随时间、空间的分布情况，利用NIST (美国国家标准和技术研究院)研发软件FDS，建立电缆隧道模型，进行全尺寸火灾模拟，通过实验数据处理和分析，给出了电缆隧道发生火灾时烟气浓度和氧气浓度以及纵向温度的变化规律，为现实火灾救援灭火、人员逃亡提供一些有效方法，并对火灾预防提出一些建议。

By the fullscale test of unsteady-flow fire in tunnel, applying aerodynamics of one-dimensional compressible unsteady-flow the relation between thermal power and thermal resistance in burning zone was analyzed, and its calculational methods were discussed. It is shown that besides heating swell, resistance and...

无论平巷或斜巷的燃烧，燃烧区的热动力势是最强的，其变化梯度为3～6Pa/m，压力最低点位于燃烧区的出口；热动力的概念把巷道一般流动损失、火区流动损失和火风压完全统一起来了，解决了实际巷道火灾燃烧区热力计算的困难，使火灾时期的风网解算更符合实际。

Botany The hood-shaped sepal or corolla of some flowers.

盔状花冠：某些花朵盔状的花萼或花冠 v.tr.intr。

Ver To interlink with each other like a chain.

为了支付高额的债务，他不得不转会到别的俱乐部。