大规模陆地深层水泥搅拌桩溢出物处理方法

Treatment method for spoil from large-scale land-based deep cement mixing pile

香港国际机场第三跑道填海工程采用大规模深层水泥搅拌桩工艺处理软土地基,施工过程产生大量泥水溢出物,由于该泥水溢出物强度低,不能直接作为合格填料用于回填。通过对比研究软弱土壤的不同处理方法,采用掺砂和水泥的方法,使之成为合格填料,让溢出物变废为宝,对类似工程项目具有较好的借鉴作用。

The main reclamation works of Hong Kong International Airport three runway system project adopts the large-scale deep cement mixing pile technology to treat the soft soil foundation,which generates a large amount of spoil during the construction process.Due to the low strength of the spoil,it cannot be directly used as a qualified material for backfilling.By comparing and studying the different treatment methods of soft soil,the method of mixing sand and cement is adopted to make it a qualified material.It could turn the spoil into treasure.This paper provides a good reference for similar projects in the future.