Construction Innovations in Slipforming Concrete Buildings

滑模混凝土建筑的施工创新

• 批准号: 8814244
• 负责人: Roozbeh Kangari
• 金额: $ 3万
• 依托单位: Georgia Tech Research Corporation - GA Tech Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1990-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814244&HistoricalAwards=false
• 关键词: Construction; Innovations; Slipforming; Concrete; Buildings; Construction; Innovations; Slipforming; Concrete; Buildings

This expedited award for novel research is to investigate construction and design problems of concrete core slipforming with a cross-disciplinary approach. Slipforming is a method of rapidly forming and placing concrete using hydraulic jacking units to raise a custom-made form. It has revolutionized the construction of bridge piers, silos, and building cores. Major problems are: to keep the form level; precise elevation measurements are required; thicker walls pose a stripping problem; construction problems due to the uneven rate of hardening of the concrete itself; precisely locating many different shaped penetrations; and another major construction problem is caused by the fact that the tolerances of the concrete core and steel frame are not compatible. The following ideas will be explored: a) the use of tapered fiberglass block-outs; b) application of vertical and horizontal lasers will be investigated; c) thermocouples embedded in the concrete of winter-constructed slipforms to constantly monitor concrete temperature for curing; d) the effect of varying the forces exerted by each jacks and changing the amount of steel rebar on the top deck to steer the core straight; and e) new ideas for designing embed plates for out of placement of horizontal and vertical directions will be tested. This research is expected to stimulate more creative and innovative construction researches by exploring new methodologies for automation of construction processes. The research activity is not merely a general academic study of core slipforming. The Sundt Corp., which has built the IBM Tower Core, in Atlanta, GA has expressed a strong interest in this research, and has agreed to provide an opportunity to the investigator to study these problems during the next few months, and to explore innovative ideas in the field to maintain the competitiveness of the U.S. slipforming construction in international and domestic markets.

这项新的新研究奖是通过跨学科方法调查混凝土核心滑动形成的构建和设计问题。 滑动形成是一种使用液压千斤顶单元快速形成和放置混凝土以提高定制形式的方法。 它彻底改变了桥梁，筒仓和建筑岩心的建造。 主要问题是：保持表单水平；需要精确的高程测量；较厚的墙壁构成了剥离问题；由于混凝土本身的硬化速度不平坦，施工问题；精确定位了许多不同形状的穿透性；另一个主要的构造问题是由于混凝土芯和钢框架不兼容的事实引起的。 将探讨以下想法：a）使用锥形玻璃纤维块； b）将研究垂直和水平激光器的应用； c）嵌入冬季结构的滑膜混凝土中的热电偶不断监测混凝土温度以固化； d）改变每个千斤顶施加的力的效果，并更改顶部甲板上的钢钢筋量以引导核心的笔直； e）将测试用于设计嵌入板的新想法，以摆脱水平和垂直方向的放置。 预计这项研究将通过探索用于建筑过程自动化的新方法来刺激更具创造力和创新的建筑研究。 研究活动不仅是对核心滑水的一般学术研究。 在佐治亚州亚特兰大建立了IBM Tower Core的SUNDT Corp.对这项研究表达了强烈的兴趣，并同意向研究人员提供机会在接下来的几个月内研究这些问题，并探索该领域的创新思想，以维持国际和国内市场的美国滑水建筑的竞争力。