摘要
本文全面介绍了华南地区某高等级公路采用排水砂井堆载预压法加固软基的实际效果 ,现场应力应变测试资料分析表明 :施工期至预压期地基平均固结度达 80 %强 ;土体抗剪强度由天然地基的 12 2kPa提高到加固后的 2 4 0kPa ,加固后的土体强度增长近一倍 ;预估经加固处理后的路基工后沉降在 30cm内 ,能满足一般高等级公路工后沉降量的要求。本文的监测成果对类似工程具有借鉴意义。
The results from the treatment of soft soil by using the sand drains and heap preloading for a high grade highway in South East China are fully introduced.Through the analysis on the stress strain testing data for the soil,it is shown that the average consolidation degree of the soil reaches 80% in the construction stage and preloading stage,that the shear strength of the treated soil changes from the original value 12 2kPa to 24 0kPa.It is predicted that the settlement in the post construction stage is less than 30cm,which can meet the requirement for the common high grade highway.The said testing results can be used as a reference for the similar project.
出处
《工程勘察》
CSCD
北大核心
2005年第3期38-41,7,共5页
Geotechnical Investigation & Surveying
关键词
排水砂井
软基
沉降
位移
固结度
抗剪强度
sand drain
soft soil
settlement
displacement
consolidation degree
shear strength
