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由“两桩一梁”组成的桩梁式托换法,其设计包括荷载计算、承台梁设计和托换桩设计等内容,同时需严格按照施工工序施工,确保施工质量,并应注意关键部位的验收。北京地区某一栋两层教学楼和某五层教室的地基基础加固采用了桩梁式托换法,通过施工期间及后期运行期间的变形观测,结果表明在科学设计、精心施工下,桩梁式托换法能有效地解决老旧建筑物的承载力和变形问题。通过工程应用,对桩梁式托换法的适用性有了更为全面的理解。
The design of pile-girder underpinning consisting of “two beams and one beam” includes the design of load calculation, the design of support beam and the design of support pile, and at the same time the construction must be strictly in accordance with the construction procedures to ensure the construction quality and should Pay attention to the acceptance of key parts. In Beijing, a two-storey teaching building and a five-storey building are reinforced with pile-girder underpinning. Through the deformation observation during construction and in the later period, the results show that under the scientific design and careful construction, Type care method can effectively solve the bearing capacity and deformation of old buildings. Through the application of engineering, the applicability of the pile underpinning method has a more comprehensive understanding.