苏拉马都跨海大桥钢套箱水下砼封底.doc

苏拉马都跨海大桥钢套箱水下砼封底
摘要:主要介绍印度尼西亚苏拉马都跨海大桥主墩承台钢套箱结构形式,承台套箱采用单壁钢吊箱形式,由底板、侧板、内支撑、悬吊系统、导向系统构成。套箱底板和侧板均采用后场分块加工,现场拼装焊接底板,侧板分块之间采用栓接,浇筑封底混凝土时在侧板开孔,保证套箱内外水位相同。,分两层浇筑,,。
关键词:单壁钢套箱、水下混凝土、混凝土封底、胡须筋、施工
Abstract: this paper is mainly introduce Indonesia horse Ursula sea-crossing bridge pile caps is main piers steel set of box structure form, tester sets box adopts single wall hanging box steel form, by bottom, side plate, interior support, suspension system, guide system structure. Set of box bottom and sides all use backcourt block processing, field assembly welding the bottom, side panel block between the bolt meet, casting back cover when the side plates concrete hole, ensure that set of box inside and outside the same water level. Sets the back cover concrete pile box total thickness m concrete bottom sealing, two layer casting, the first underwater concrete bottom sealing layer thickness of m, and the second on a box
after pumping without water under the environment of dry and welding steel and steel beard back pressure after the casting concrete screed-coat m.
Keywords: single wall of steel box, the underwater concrete bottom sealing and reinforced concrete, beard, construction


中图分类号:TU74 文献标识码:A文章编号:
1. 工程概况
苏拉马都跨海大桥是印度尼西亚联接泗水―马都拉岛的一座特大型桥梁,主桥为双塔双索面叠合梁飘浮体系斜拉桥,全长818m,主跨434m。主桥基础工程位于马都拉(MADURA)海峡,水深约21m,属于浅海区,P46、,桩长分别为97m、104m的钻孔灌注桩,,,壁厚20mm,入土深度分别为10m、15m。主墩承台采用八边形构造,平面尺寸为5720cm×3400cm,承台底标高-,。承台采用单壁钢套箱施工工艺,一座主墩承台混凝土方量10632m³,分三次浇筑。,方量为1451 m³。主塔基础一般构造图见图1。
图1 主塔基础一般构造图
2. 设计条件

设计水位:+,设计低水位:-。
经过我们的实际观测(部分时段),桥位处的潮水位标高与潮汐表提供数据不符合,实测的潮汐标高数据如下:
实测最高潮水位:+ m;
实测最低潮水位:- m;
,则最高潮水位按+,最低潮水位按-。

设计高水位时:潮流V=

20年一遇风暴水位的NE:H5%=,波浪波长L=,周期T=。

海床标高:P46 号墩-,P47号墩-16.