格构式钢柱回顶支撑施工升降机基础施工技术
Construction Technology of Lattice Steel Column Jacking Support Construction Elevator Foundation

目前，越来越多的住宅小区各栋住宅楼之间采用地下车库相连，施工过程中对于垂直运输所需的施工升降机基础很多设置在地下车库顶板上部。但地下车库顶板往往无法承载施工升降机运行时的荷载，这就需要对地下室顶板采取回顶支撑措施。本文通过工程实例阐述了施工升降机基础放置地下室顶板上的用格构式钢柱回顶加固技术并与传统扣件式钢管回顶支撑技术作经济效益比较，表明了该技术安全可靠、经济适用，可为类似工程提供借鉴。
At present, more and more residential areas are connected by underground garage. During the construction process, many construction elevator foundations required for vertical transportation are set on the upper part of the roof of the underground garage. However, the roof of underground garage is often unable to bear the load of construction elevator, so it is necessary to take back roof support measures for the roof of basement. Through engineering examples, this paper expounds on the back jacking reinforcement technology of lattice steel column for placing the construction elevator foundation on the basement roof, and compares the economic benefits with the traditional fastener steel pipe back jacking support technology, which shows that this technology is safe, relia-ble, economical and applicable, and can provide a reference for similar projects.