超高层大直径多隔板高抛自密实钢管混凝土施工技术

Construction of High-dropping Self-compacting Concrete in the Super Tall Building with Large-diameter and Multi-clapboard

超高层建筑多采用混凝土核心筒+钢结构外框架的结构形式,外框柱一般采用型钢混凝土柱或钢管混凝土柱两种形式,钢管混凝土柱因混凝土强度高、混凝土泵送高度高、钢管内多横向及竖向隔板障碍等因素,施工难度大。结合某塔楼工程,从1∶1模拟构件试验、配合比设计、原材料控制、施工方法、质量检测等关键技术进行研究,经过多次试验研究,系统地总结了高抛自密实钢管混凝土施工的关键技术。

The structure of super tall rise building is usually concrete core tube ＋ steel outer framework. The outer framework usually applied steel reinforced concrete column and concrete filled steel tube column. Because of the concrete high strength, high pumping height, many clapboard in level and vertical direction of concrete filled steel tube columns,the construction difficulty is very large. Combining with a tower project,a series of key techniques including testing component at 1 ： 1 scale, mix proportion design, raw materials control, construction method, quality inspection are researched. Through many times of test research, construction key technology of high-dropping self-compacting concrete is summarized.