机场盐渍土地基处理的设计与施工

The design and construction of foundation treatment of airport with saline soil

硫酸盐渍土的主要危害是盐胀,对于建在盐渍土地区的机场来说关键是减少盐胀对机场道面板的不利影响,目前常用处理方法常忽略了上覆荷载(机场道面荷载、回填荷载)对盐胀的抑制作用。本文根据已有的"上覆荷载的抑制效果"研究,结合设置隔断层法进行盐渍土处理,确定了地基开挖及回填深度,通过部分处理高含盐量盐渍土,同时重视阻断水分、盐分的通道,从消除盐胀发生主要外因和上覆荷载的抑制作用两道防线上控制盐胀,现场监测数据和室内研究较符合,且获得良好效益。

Salt expansion is the main hazards of sulfate saline soil, so the key point to deal with the foundation is to reduce the adverse impact of the salt expansion on panel of the airport road which is built in saline soil area,the treatment methods commonly used often ignore the inhibition of overlying load （Airport Road＇ s surface loads,backfill load） on the salt expansion.We deal with the saline soil foundation based on the research on the inhibitory effect of the overlying load and the use of cut-off layer in treatment,and to determine the depth of excavation and backfill of foundation,we partly deal with the high salt content of saline we can control the salt expansion by two lines of eliminating the main external factors and the inhibition of the overlying 1 data match the lab test well and it concluded a good benefit.