预应力竹节桩与预应力圆管桩竖向承载性能对比研究

Comparative Study on Vertical Bearing Behaviors of Prestressed Bamboo Joint Piles and Prestressed Pipe Piles

对某工程中的3根机械连接预应力竹节桩和3根预应力圆管桩,进行静荷载试验,研究其荷载-沉降的变化规律;再采用有限元软件ADINA对典型试验桩的荷载-沉降规律进行有限元模拟。试验及有限元模拟结果表明:机械连接预应力竹节桩的荷载-沉降曲线呈缓变型,与预应力圆管桩相比,曲线变化相对平缓,说明预应力竹节桩比圆管桩的承载力大。

Made static load tests on three mechanical-connection prestressed bamboo joint piles and three prestressed pipe piles in a project, and studied the load-settlement laws. Applied ADINA finite element software to simulate the load-settlement laws of typical testing piles. The test and finite element simulation results showed that the load-settlement curves of mechanical-connection prestressed bamboo joint piles were slow variant, and compared with prestressed pipe piles, the curves change were relatively fiat. It indicated that the mechanical-connection prestressed bamboo joint piles had a higher bearing capacity than the prestressed pipe piles.