拱顶

De Molendino, still perched among the acanthus leaves of his capital.

磨坊的约翰叹道，他一直高踞在拱顶的叶板上。

In this paper, the authors analyze the problems existed in modifying arch-roof tank into inner floating roof tank, point out that the perpendicularity and circularity of tank are the two most important parameters in the modification.

对拱顶罐的状况及拱顶罐改为内浮顶罐存在的问题进行了分析，指出储罐的垂直度和圆度是内浮顶改造的关键。

"It is often a roofed, arcaded open gallery on an upper story overlook ing a court, though it can also be a separate arcaded or colonnaded structure."

往往在房子的顶层设带拱顶的，可以俯瞰庭园的敞廊，尽管也可以是一个分离的带拱顶的或带廊柱的结构。

"It is often a roofed, arcaded open gallery on an upper story overlooking a court, though it can also be a separate arcaded or colonnaded structure."

往往在房子的顶层设带拱顶的，可以俯瞰庭园的敞廊，尽管也可以是一个分离的带拱顶的或带廊柱的结构。

Brick joints of arch and vault shall be staggered and control line shall be introduced from longitudinal joints to keep straightness of brick surface.

拱或拱顶应错缝砌筑，错缝砌筑的拱和拱顶，应沿纵向缝拉线砌筑，保持砖面平直。

Based on the total potential energy principle, the cusp catastrophic model for instability and failure of deep-buried tunnel surrounding rock is established. Through the observed data of settlement values of typical section vault of deep-buried tunnel and the sudden threshold values of displacement of each monitoring section, the variable values of vault settlement function are obtained, and the stability of deep surrounding rock in tunnel is decided.

运用突变理论探讨了深埋隧道失稳的机制；根据总势能原理，建立了隧道失稳的尖点突变模型，导出了失稳的力学判据条件；并基于深埋隧道典型断面拱顶下沉量现场量测的数据，计算出拱顶下沉函数的各变量值，由各监测断面位移突变阀值来判别深埋隧道围岩的稳定性，分析结果与实际施工围岩情况一致。

The major content of this thesis are as follows:1 Performed FEM analysis before strengthening, and to find out the reason for the cracking and present a strengthening scheme;2 Performed nonlinear FEM analysis before and after strengthening, and to get the varying rule of the relative displacement between the on-site cast concrete side wall and that between the precast concrete arch and the floor, as well as the stress distribution of the gallery;3 Performed on-site observation experiments on the 7~th gallery, and to get the varying rule of the relative displacement between the on-site cast concrete side wall, as well as that between the precast concrete arch and the floor.4 The results of the computation were compared with those of experiments, which verified the effect of the strengthening.

本文的主要工作有： 1 对加固之前的廊道结构进行有限元计算，找出廊道底板开裂的原因，提出加固方案； 2 对加固前后廊道结构进行非线性有限元计算，得到加固前后廊道两现浇边墙相对位移、拱顶与底板相对位移随水库水位变化的规律和廊道结构的应力分布情况； 3 进行廊道加固前后现场观测试验，得到廊道两现浇边墙相对位移以及拱顶与底板相对位移随水库水位变化的规律； 4 对比分析加固前后现场观测试验与非线性有限元计算所得结果，论证加固方案的合理性，验证加固效果。

Points out a tentative plan to storage kerosene with inner floating roof tank and gives experience calculation formulae of "big breathing, breathing" losses in vertical dome roof tank and inner floating roof oil tank.

提出了用内浮顶罐装煤油的设想，分别给出了立式拱顶罐和内浮顶油罐&大、小呼吸&损耗经验计算公式，并对内浮顶罐和拱顶罐装煤油时的蒸发损耗量以及两种油罐的造价等进行了对比计算，认为用内浮顶罐储存煤油是经济、合理和安全的，建议新建煤油储罐时应采用浮顶油罐。

You have chosen arc edge dome , geodesic dome .

你选择了弧棱拱顶，测地线拱顶。

Built geodesic dome , geodesic dome , dense grid, dome , geodesic dome , polyhedral dome .

测地线拱顶，短程线拱顶，密网格穹隆，网格球顶，多面体穹窿。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。