新型海上自动化PVD施工船应用于软弱地基的加固技术

Reinforcement technology of new offshore automatic PVD construction barge applied to soft foundation

针对香港机场三跑工程淤泥土软基加固,采用先进的自动化海上PVD施工船舶插设塑料排水板PVD,形成排水固结通道,加速淤泥土的排水固结和沉降,有效提高了地基承载力。通过堆载预压法加固淤泥土地基的施工期沉降量达2.8~3.6 m,软土强度提升显著,加固效果好,本项目成功施工经验为华南地区海相淤泥软土加固提供很好的参考和借鉴。

For the reinforcement of marine deposit soft foundation of Hong Kong Airport three runway project,the advanced automatic offshore PVD construction barge was adopted to install PVD automatically to form the drainage consolidation channel for the acceleration of consolidation and settlement of marine deposit and increase the bearing capacity.By the method of preloading with PVD,the settlement of marine deposit foundation during construction is about 2.8~3.6 m resulting in a significant increase in the strength of soft soil,and the reinforcement effect is good.The successful construction experience of this project provides a valuable reference for the reinforcement of marine deposit soft soil in South China.