爆炸挤淤在填海造路软基处理工程中应用

Application of Blasting Compaction in a Highway Embankment Over Soft Soils by Reclamation

在软基处理中,爆炸挤淤具有施工便捷、节约成本、工期短、软基处理效果显著等特点。以宁德市某填海造路工程为研究对象,采用干滩(即滩涂爆破)爆炸挤淤法代替原砂桩及管桩处理软基法,根据该工程施工特点、淤泥物理力学性质和施工难点,设计了该填海工程软基处理的爆炸挤淤方案和技术参数,阐述了可能造成的爆破危害效应及相应的安全控制措施。监测表明,采用该方法爆破后堤身稳定性好,爆破挤淤满足工后月沉降不大于6 mm的沉降标准,爆破挤淤法处理软基的方式是科学可行的,为其他类似工程提供借鉴。

In the soft soil treatment,the blasting replacement of the soft soils has the characteristics of convenient in construction,low cost,short construction duration and significant soft soil improvement effects.This paper takes the blasting soil replacement method instead of the original sand drain and pipe pile method for the soft soil improvement for a road reclamation project in Ningde City.Based on the construction characteristics of the project,the physical and mechanical properties of the mucky soils and the original construction difficulties,this paper presents a new ground improvement method of using blasting replacement of the mucky soils and its design parameters.The potential hazards induced by the blasting and the safety measures are also discussed in the paper.Monitoring results show that the embankment stability is satisfactory,the monthly post construction settlement is less than 6mm.The application of the blasting replacement method in the soft soil improvement is feasible.