安哥拉“道谷”教堂地基基础托换加固技术

Foundation underpinning reinforcement technology of Angola "Daogu" Church

安哥拉"道谷"教堂在后加外墙荷载作用下,外墙柱偏心荷载效应远大于其抵抗力,同时地基承载力严重不足且建筑物的沉降速率远大于规范规定。通过对原结构外墙柱及基础的计算分析,对该教堂外墙柱及地基基础结构的安全性能进行了综合评价。在进行加固设计方案的优化时,改变了常规的加固思路,采用托换加固技术,解决了原外墙柱的抵抗力和基础承载力不足的问题。该技术把原来复杂的外墙柱及地基基础受力状态简化为受力明确的桩基础,确保了结构的加固安全,降低了加固成本,为同类工程提供了地基基础加固设计的新思路。

Under the effect of the adding exterior wall loads of Angola ＂Daogu＂ Church, the exterior wall column eccentric load effect was much larger than the resistance. At the same time, the bearing capacity of foundation was in a serious shortage and the sedimentation rate of the building exceeded the specification of codes. The column and foundation of the exterior wall of original structure were calculated and analyzed, and the safety performance comprehensive evaluation of this church exterior wall column and foundation was conducted. In the reinforcement design optimization, the underpinning reinforcement technology was used to solve the insufficient of resistance of the original exterior wall column and the shortage of the bearing capacity of foundation. The technology simplifies the complex force state of the original exterior wall column and foundation as a clear force state of pile foundation, which can ensure the security reinforcement structure, reduce the reinforcement costs, and provide a new idea for foundation reinforcement design in similar projects.