预应力管桩加内支撑技术在深基坑支护中的应用

The Application of Adding Internal Support Technology in the Pre-Stressed Pipe Pile in the Deep Foundation Pit Support

无锡会展中心工程-5.3m基础底板以下120m长、4.5m宽、5m深通风槽施工项目,经过对几种支护方案的造价、工期、文明施工、安全等方面进行比对后,选用直径为500mm的预应力管桩加DN450mm×20mm钢管内支撑支护方案,论文对其设计和使施工过程进行介绍。

After comparing the cost,construction period,civilized construction,safety and other aspects of several support schemes,the prestressed pipe pile with diameter of 500 mm and the inner support scheme of DN450 mm×20 mm steel pipe were selected for the ventilation chute project of Wuxi Exhibition Center project with a length of 120 m,a length of 4.5 m and a depth of 5 m under the foundation floor of 5.3 m.