摘要
本文以某六层既有砌体结构为例,开展了既有建筑外墙保留内部框架结构置换关键技术研究。在内部结构先不拆除的情况下,提出采用边拆边建的设计思路和结构置换方法,并进行了施工模拟分析;针对既有房屋基础和结构布置特点,提出适宜的基础及底部墙体托换技术,验证了双梁夹墙技术的可行性;采用锚板与锚筋将原砌体墙与新增框架梁柱拉结,验证墙体自身受压承载力、锚筋抗剪承载力,保证外墙的稳定性,确保保留外墙与新建框架的变形协调;框架柱先浇筑,提出墙体凿除和楼板临时支撑设计方法,考虑框架梁柱两次先后施工的影响,设计梁柱连接节点加强做法。研究成果可为类似工程提供参考借鉴。
In this paper, a six story existing masonry structure is taken as an example to carry out the research on the key technology of replacing internal structure and retaining exterior walls of the existing building. Under the condition that the internal structure is not demolished first, the design idea and structure replacement method of demolishing while building are proposed, and construction simulation analysis is performed. According to the characteristics of existing building foundation and structure layout, the appropriate underpinning technology of foundation and bottom walls is proposed, and the feasibility of double beam sandwich wall technology is verified. Anchor plates and anchor bars are used to tie the original masonry walls with the newly added frame beams and columns to verify the compressive bearing capacity of the walls and the shear bearing capacity of anchor bars, so as to ensure the stability of the external walls and the deformation coordination between the external walls and the new frame. The frame columns shall be poured first, and the design method of wall chiseling and temporary floor support shall be put forward. Considering the influence of two successive constructions of frame beams and columns, the strengthening method of beam column connection joints shall be designed. The research results can provide reference for similar projects.
出处
《土木工程》
2023年第7期955-963,共9页
Hans Journal of Civil Engineering
