逆作钢格构立柱在基坑内支撑中的应用研究

Application research of reversed steel lattice column in foundation support

大面积基坑开挖经常采用钢格构立柱作为临时竖向支撑,但其拆除后与地下室底板的连接部位容易成为防水施工的薄弱环节。介绍了一种逆作钢格构立柱结构,垂直度控制系统可以快速精准地调节格构柱垂直度,可拆除封闭箱体、整体式止水钢板和可回缩吊模等组成的防水体系有效确保了连接部位的防水性能。

Large-scale foundation pit excavation often uses steel lattice column as temporary vertical support, but its connection with the basement floor after demolition is likely to become a weak link in waterproof construction. A reverse-grid steel lattice column structure was introduced in this paper. The verticality control system can quickly and accurately adjust the verticality of the lattice column. The waterproof system consisting of a closed box, an integral water-stop steel plate and a retractable hanging mold effectively ensured the waterproof performance of the joint.