潮间带爆破挤淤加固地基沉降现场监测分析

In-Situ Monitoring and Analysis of Settlement in Tidal Zone Soft Soils Improved by Blasting Method

爆破挤淤法处理深厚软土地基具有施工工序简单,工期短,成本低等优点,该方法处理的地基竖向沉降是直接判定处理效果的指标之一。对于加固滨海潮间带软土,这种方法适用性高,但是竖向沉降变形规律相关报道较少,为了探明竖向沉降的演化规律,依托我国东南滨海某潮间带公路建设项目,采用沉降板开展长期观测并分析。研究发现爆破挤淤施工50 d以后路基沉降趋于稳定,172 d内最大沉降实测值0.307 m,1号沉降板观测期内竖向沉降已趋于收敛。

The soil improvement by blasting method has the advantages of simple construction process,short construction period and cost effective.The vertical settlement of soft soils improved by this method is one of the indicators for the treatment effect.This method is widely applied in strengthening soft soils in the coastal tidal zone.However,the vertical deformation pattern of improved soils is rarely reported.To investigate the settlement of the improved soils in the tidal zone,a long-term settlement observation program for highway project by using the settlement plates was implemented.The results indicate that the settlement of the roadway embankment stabilized after 50 days after the blasting treatment.The observed maximum settlement value in 172 days was 0.307 m and the settlement plate No.1 was stabilized in during observation period.