Support-free mounting process for three-section-column umbrella-shaped cantilever parts: Fid-Bau Portal

Support-free mounting process for three-section-column umbrella-shaped cantilever parts

WANG YA

The invention relates to a support-free mounting process for three-section-column umbrella-shaped cantilever parts. The support-free mounting process comprises the following steps that an umbrella seat and a member above the umbrella seat are pre-assembled, and a jig frame is mounted and assembled; embedded anchor bolts are positioned and mounted according to the marked positions; the first section of umbrella column is mounted, corrected and fixed through cable ropes and chain blocks; a second section of umbrella column and a third section of umbrella column are mounted, corrected and welded; umbrella seat part is mounted, corrected and welded to form the umbrella seat; the umbrella-shaped structure is mounted and welded, specifically, an umbrella-shaped supporting structure and an umbrella cover structure are mounted and welded, and the umbrella-shaped supporting structure is fixed through cable ropes and chain blocks; and part mounting size adjustment including elevation, torsion and perpendicularity adjustment are carried out. According to the support-free mounting process for the three-section-column umbrella-shaped cantilever part, cantilever parts are mounted layer by layer and section by section through the layered and sectional mounting technology, support-free mounting of the umbrella-shaped large cantilever structural parts is completed through fixing of the cable ropes and the chain blocks, resource investment is reduced to the maximum extent, unloading is not needed after construction is completed, the mounting technology is simple, convenient, safe and reliable, and operability and practicability are high.

本发明涉及一种三节柱伞状悬挑构件免支撑安装工艺，包括以下步骤：预拼装伞座及伞座以上构件，安装拼装胎架；对预埋锚栓进行定位并按标记位置安装；通过缆风绳和倒链对首节伞柱进行安装、校正和固定；安装、校正和焊接第二、三节伞柱；安装、校正和焊接伞座构件形成伞座；安装和焊接伞状结构，包括伞状支撑结构和伞面结构的安装和焊接，伞状支撑结构通过缆风绳和倒链固定；构件安装尺寸调节，包括标高、扭转和垂直度调整。本发明通过分层分节的安装工艺，逐层逐节进行悬挑构件的安装，通过缆风绳和倒链固定，完成伞状大型悬挑结构构件的免支撑安装，最大限度减少资源投入，施工完毕无需卸载，安装工艺简洁方便，安全可靠，可操作性和实用性强。

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