贾  强    范夕森
    （山东建筑工程学院  济南 250014）

[提要]  某4层砖混结构办公楼需拆除层2,3部分承重墙，改造成为大空间的车间。承重墙顶部的圈梁需加固。由于层4墙体不拆除，层3梁上部荷载较大，采用了圈梁侧做托梁、后拆墙的方案。层3墙拆除后，层2梁上部荷载较小，加固可采用临时硬撑支顶，先拆墙、在梁底加大截面的方案；为支撑托梁，对构造柱进行了处理。
[关键词]  改造  扩大截面  临时支撑  拆墙  加固

A four-storey mansory office building is reformed into a large space workshop by removing the second and third floor bearing wall. The girth on top of the wall is reinforced. While the fourth floor wall is reserved, the load on the third floor is too large to be beared by temporary supports. An attached new beam is added to hold the original girth. After the wall in the third floor is removed, the temporary supports have enough strength to bear the load on the second floor, so the beam on the second floor can be reinforced by enlarging the beam section area.The stiff column is also changed to hold the new beam.
Keywords:  reforming; enlarging section area;  temporary supports; removing wall; strengthening