坝后冲沟的危害及处理

文章根据索溪水库大坝坝后4#冲沟采用浆砌石传力墙处理大坝左岸剩余滑动力并获得成功这一工程实例,提出解决水工建筑物同一类问题的一种处理方法。

Electrostatic force on the rectangular shield wall of a strip transmission line

For a strip transmission line shielded by rectangular walls, the Green抯 function is helpful to construct the variation expression of the electrostatic energy. Thomson theorem is employed to determine the charge distribution on the strip. The electrostatic force on each side of the rectangular shield wall is achieved by using the principle of virtual work. The result is easy to be obtained by computerized calculation.

先张法预应力空心板梁场设计与施工

先张法张拉台座是先张法预制场的重要组成部分,张拉台座设置必需具有足够的强度和稳定性,安全而且经济合理。结合七里河大桥先张法预制场成功运营生产经验,详细介绍本预制场总体布局、张拉台座设计与施工等。