雷击直埋通信电缆产生的过电压危害非常严重。
When lightning strikes a direct buried communication cable, the over voltage produced on the cable is inevitable.
适合管道，槽道，电缆沟，架空，直埋等敷设方式。
Suitable for pipe, channel, cable trenches, aerial, direct burial and so on.
当雷击直埋通信电缆时，必然在电缆上产生过电压。
When lightning strikes a direct- buried cable, the over-voltage produced on the cable is inevitable.
直埋敷设方式越来越广泛的应用于供热管道的敷设中。
The directly buried installation has been applying in the heating pipeline more and more.
介绍了作为预制直埋保温管保温层的聚氨酯泡沫塑料的特性。
The characteristics of polyurethane foam used as insulating layer of prefabricated directly buried insulating pipe are introduced.
介绍了有补偿无次固定支座直埋热力管道的敷设原理与方法。
This paper introduces the laying principles and ways of having compensation no secondary fixed support mound preinsulated district heating pipes.
根据螺栓埋设方法与基础混凝土施工方法，可分为直埋与预埋。
According to the constructing ways of concrete in foundation, the installing methods of anchor bolts may be classified as direct installing and pre-installing.
文中还对热缠绕直埋保温管与地沟敷设保温管做了技术经济分析。
In the paper, a technological economic analysis is made as well to compare the twisting thermal insulated direct-buried pipes with underground tunnel laying ones.
适用于所有尺寸的聚乙烯和金属护套电缆的架空、直埋和管道系统。
Be suitable for the buried, underground and pipeline systems with PE and metal wraparound sleeves of all size.
本文探讨和介绍了蒸汽直埋敷设管道的保温及保温层厚度计算方法。
The heat preservation and calculation method for thickness layer of directly-buried steam pipes are discussed and introduced.
将直埋理论灵活地应用在实际工程中，做到降低工程造价、方便施工。
The theory of the covered heating pipe should be flexibly applied for the engineering practice to reduce the cost and facilitate the construction.
对于直埋地下的管道，由于环境热阻比较复杂，其传热计算方法尚不统一。
There is no uniform calculation method for buried directly pipeline because of more complicated circumstances of thermal resistance.
多屏绝热辐射直埋蒸汽管道保温层由多层屏蔽反射层与常规保温材料制成。
The insulating layer of multi-screen insulated radiant directly buried steam pipeline is composed of multi-screens reflecting layer and conventional insulating material.
介绍了直埋供热管道设计计算软件的系统构成及计算原理，列举了计算实例。
The system composition and calculation principle of the calculation software for design of directly buried heat-supply pipeline are introduced, and the calculation examples are enumerated.
探讨了直埋供热管道的失效，针对局部失稳和椭圆化变形，提出了设计要点。
The failure of directly buried heat-supply pipeline is discussed, and the design essentials are put forward in accordance with local buckling and ovalization deformation.
论述了大管径供热管道直埋施工，在城市管网改造中的施工方法和质量控制。
This paper expounds the direct embed construction of heat input pipe with big diameter, and its constructing method and quality control in the rebuilding of urban pipe network as well.
本部分还讨论了直埋固定墩的设计以及各种管道布置形式下的固定墩推力计算方法。
This part also discussed the design of buried anchor and anchor's thrust count ways for each form of the pipe lay.
建立了供热管网直埋、地沟敷设管道的二维数学模型，通过边界离散方法进行了求解。
Develops the two dimensional mathematical models for direct-buried pipes and in-duct pipes and solves them using the boundary discretization method.
通过工程实例，详细介绍了蒸汽直埋管道的主要设计工艺、特殊管段的处理及施工技术。
With an example, presents in detail the main design technology, treatment of special pipe sections and construction technology.
通过对直埋管线的分析，得出了综合设计的优点，提出应加强管理，保证施工顺利进行。
Based on the analysis of direct-buried pipe the advantages of general design are proposed. At last some corresponding management measures are put forwards to ensure the completion of construction.
用于直埋、工井或隧道内敷设的两段电缆连接，电缆金属护套可直接连接，也可交叉连接。
For connection of two sections cable in direct burial, working well or tunnel, the cable metal bushing can be connected directly, and also can be connected across.
此外，还提出了牺牲阳极在直埋蒸汽管道中应用的局限性，为此类管道的安装提供了参考。
Besides, it raises the limit of use of sacrificial anode in directly buried steam pipeline and AIRS our corresponding views. It can be used as a reference for the installation of such pipes.
探讨了直埋蒸汽管道的保温结构、保温材料、外保护管、固定支座、补偿器、疏水装置等技术。
The technique of directly buried steam pipeline such as insulation construction, insulating material, outside protective pipe, fixing support, compensator, and steam trap connections is discussed.
介绍了新型农用直埋电力电缆系列产品与JB/T 2171标准界定产品的结构差异及特征。
This paper presents the differences between a new type of directly-buried rural cables and those specified by JB/T 2171.
为进一步研究直埋敷设在地下的电缆的温度和电压之间的关系和实际的电缆安全运行提供了数据。
The further study on the relation between the temperature and voltage of the electric underground cables provides a guide for the optimal arrangement of the cable.
并对有补偿和无补偿直埋供热管道的基本原理及计算方式进行了比较，介绍了直埋供热管道的优点。
The working principles and methods of calculation of both compensated and non - compensated heating pipe lines are compared and the advantages of directly buried pipelines are pointed out in this pa…
基于文克勒理论采用ANSYS软件建立了直埋热水供热管道的有限元模型，模拟了土壤对管道的作用。
Based on the Winkler theory, the finite element model for directly buried hot water heat-supply pipeline is founded by using ANSYS software, and the effect of soil on pipeline is simulated.
基于文克勒理论采用ANSYS软件建立了直埋热水供热管道的有限元模型，模拟了土壤对管道的作用。
Based on the Winkler theory, the finite element model for directly buried hot water heat-supply pipeline is founded by using ANSYS software, and the effect of soil on pipeline is simulated.
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