查询词典 ground shield

Based on the sectional shield tunnels of metro in China, mechanical behavior of segment structure of shield tunnel under the different erection methods has been studied with geometric proportion of 1:12 through the simulated model tests of 3D 'ground-shield tunnel' in which joint effects of segments and mutual action effects between segments and ground are considered.

以我国城市地铁区间盾构隧道为对象，采用几何比 1/12、同时考虑盾构隧道管片接头效应和管片与土体相互作用效应，用三维土-盾构隧道相似模型试验对盾构隧道管片结构在不同拼装方式下的力学行为进行了研究，并将研究结果与梁-弹簧模型的理论分析结果进行了比较，得出的结论可为盾构隧道的设计提供参考。

The relations of inducing skin current of shielding layer, core voltage and core current with the environment field were obtained. The change of shield layer current wave with grounding state of external shield and core voltage with loading resistance was analyzed. According to the dependence of shield layer current oscillating frequency on electromagnetic wave propagation velocity, conception of transporting line of shield layer-ground with equivalent relative dielectric constant was presented. fited equation of equivalent relative dielectric constant with change of cable height was given.

试验得到九芯电缆屏蔽层感应电流、芯线感应电压、芯线感应电流以及环境场之间的关系；分析了皮电流波形随外皮接地状态的变化，芯电压随负载电阻的变化；基于皮电流振荡频率与电磁波传播速度的关系，提出了屏蔽层-大地"传输线"等效相对介电常数概念，给出了等效相对介电常数随电缆高度变化的拟合式；皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。

Analysis is made on the risks of the shield tunneling across the existing railway by means of FEM and the following technical countermeasures are proposed: firstly, preconsolidation is made for the ground where the shield passes so as to improve the ground's stability; secondly, strengthened segments with preserved grouting holes are adopted in the tunnel design; thirdly, proper resources are allocated, the construction parameters are optimized and the construction monitoring and measurement are enhanced; finally, the shield tunneling is executed strictly following the predetermined plan.

采用有限元理论分析在有无旋喷桩情况下盾构穿越铁路的风险因素、提出控制沉降的技术措施：首先对盾构穿越区的地层进行了预先加固来改良地层，使地层有较好的稳定性；其次在盾构隧道设计上采用加强性管片，并增加施工预留注浆孔；在盾构穿越过程中合理配置资源，优化施工参数，加强监测和信息化管理。

Achilles in his turn threw, and struck the round shield of Aeneas at the very edge, where the bronze was thinnest; the spear of Pelian ash went clean through, and the shield rang under the blow; Aeneas was afraid, and crouched backwards, holding the shield away from him; the spear, however, flew over his back, and stuck quivering in the ground, after having gone through both circles of the sheltering shield.

接着，阿基琉斯奋臂投掷，落影森长的枪矛击中埃内阿斯溜圆的战盾，盾围的边沿，铜层稀薄，亦是牛皮铺垫最薄弱的部位。裴利昂的木杆枪矛把落点破底透穿，盾牌吃不住重击，发出沉闷的声响。埃内阿斯屈身躲避，撑出战盾，挡在头前，吓得心惊肉跳――枪尖飞越肩背，呼啸着扎入泥尘，捣去两个层面，从护身的皮盾。

A plurality of conductors are deposited on a layer of dielectric that is positioned above a first ground shield.

在电介质层上沉积多个导线，所述电介质层位于第一接地屏蔽上方。

The bright spot above the ground shield in the foreground is Jupiter.

以上在前台地面盾亮点是木星。

Thereafter, a second ground shield is deposited over the mounds of dielectric.

此后，第二接地屏蔽被沉积在所述电介质堆上面。

By mechanics analysis of ground deformation, this paper makes a systematic research on the affecting factors of ground deformation of shield tunnel and excavation and establishes a predicted model of ground deformation based on neural network. This model is applied to predict actual ground deformation caused by shield tunnel and excavation in Shanghai, Guangzhou, Nanjing etc.

本文以盾构法隧道和基坑为研究对象，通过对地面变形机理的分析，全面系统地从理论上探讨了盾构隧道和基坑引起地面变形的影响因素，建立了基于神经网络的地面变形预测模型，并运用该模型对上海、广州、南京等城市的盾构隧道和基坑工程所引起的地面变形进行了实际预测，获得了令人满意的预测结果。

Running sand and loose gravel of silt,which are practically cohesionless and which cannot be safely and efficiently dug out by ordinary soft-ground tunneling techniques,can be handled by the use of shield,usually working in free air.

沙子和松散的碎石中运行，这简直是淤泥无粘性和不安全高效地挖出普通soft-ground掘进技术，可以通过使用盾牌，通常在自由的空气。

During the construction period of shield shaft, quite a significant disruption against the surrounding ground might happen, therefore, upon shield break-out, the ground surrounding the shaft eye should be conditioned to enable the said ground to be standing alone after ground improvement, to safeguard a successful break-out.

而盾构工作井构筑过程中，会对周围土体产生较大的扰动。因此，盾构出洞前，需要对洞口土体进行处理，使洞口土体经改良后达到可以自立的状态，从而保证盾构顺利出洞。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。