钢围堰的设计与计算.rar

钢围堰的设计与计算
1、钢围堰几何尺寸
围堰外形尺寸是根据承台的水平几何尺寸，各边再加上0.6～0.8ｍ的操作宽度，高度依据水深，并考虑0.5ｍ的超高和入土深度不小于0.5ｍ确定。该工程的地质资料表明，围堰底的土层为粉质粘土和淤泥质粉质粘土，该工程取0.7ｍ的入土深度。
2、钢围堰的计算
钢围堰在运行期所受的外力，除了堰内外水位差产生的外力，还有堰内填料产生的外力，它是同水位差产生的力方向相反，结构计算时要分别进行，结构计算方法参照《水工钢结构》。
3、钢围堰的安装
钢围堰在场外加工结束后，需进行现场吊装就位，就位之前要清除水下的建筑垃圾及其他杂物，整平地基槽，以利于围堰平稳均衡下沉，使承台四周的施工空间达到均衡。
Design and calculation of steel cofferdam
1, steel cofferdam geometry
Cofferdam dimensions are based on the level cap geometry, each side plus 0.6 ~ 0.8m operating width, height, based on water depth, and consider 0.5m the high and the embedded depth of not less than 0.5m OK. The engineering geological data indicate that the end of the cofferdam for the silty clay soil and silty clay, taking the project a depth of 0.7m.
2, the calculation of steel cofferdam
Steel cofferdam suffered external force in the run-time, in addition to dam the water level difference inside and outside the external force generated, there are external forces generated by packing in weir, which is the difference with the water level in the force produced in the opposite direction, structure calculations were carried out when the structure calculation reference to "hydraulic steel structure."
3, the installation of steel cofferdam
Steel cofferdam on the sidelines after processing takes place on-site erection, in place prior to removal of construction debris and other underwater debris, leveling ground tank, in order to facilitate sinking cofferdam and balanced, so that cap the surrounding construction space equilibrium.