Span widening transformation method for reinforced concrete frame structure: Fid-Bau Portal

Span widening transformation method for reinforced concrete frame structure

LI QINGTAO / IBI / YAO JUCAN

A span widening transformation method for a reinforced concrete frame structure comprises the steps that firstly, the ground on one side of a span is excavated to the bottom face of a foundation; secondly, an independent foundation under a new column is additionally arranged on the outer side of the corridor; 3, extending an original foundation beam of the independent foundation under the original column, and additionally arranging a new foundation beam and a new bottom floor slab; fourthly, four sets of first vertical supporting mechanisms are erected on the lower portion of the original cantilever beam of each layer; fifthly, a pouring formwork of the newly-added beam and a pouring formwork of the newly-added plate are erected; sixthly, newly-added beam steel bars are bound; seventhly, a square steel plate is embedded in the contact face of the original cantilever beam and the cantilever beam extension beam to serve as a shear key; 8, newly-added plate steel bars are bound; ninthly, newly-added column steel bars are bound; tenthly, a newly-added column formwork is erected, and newly-added beam plate column concrete is poured; and 11, after the concrete is cured to the design strength, the formwork is dismantled, and the supports are removed. According to the method, the original building is widened through span widening, more use space can be provided, and the functional requirements of the building can be met.

一种钢筋混凝土框架结构拓跨加宽改造方法，步骤一：挖开拓跨一侧的地面至基础底面；步骤二：在连廊外侧增设新柱下独立基础；步骤三：延长原柱下独立基础的原基础梁，增设新基础梁和新底层楼板；步骤四：在各层原悬挑梁下部支设四组竖向支撑机构一；步骤五：支设新增梁及新增板的浇筑模板；步骤六：绑扎新增梁钢筋；步骤七：在原悬挑梁和悬挑梁延长梁的接触面嵌设方钢板作为抗剪键；步骤八：绑扎新增板钢筋；步骤九：绑扎新增柱钢筋；步骤十：支设新增柱模板，并浇筑新增梁板柱混凝土；步骤十一：养护混凝土至设计强度后，拆除模板，卸除支撑。该方法通过拓跨加宽原建筑物，可以提供更多的使用空间，能满足建筑物的功能需求。

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