深厚软土路基处理中的监测及加固效果分析  

Analysis on Monitoring and Reinforcement Effect in the Treatment of Deep Soft Soil Subgrade

作　　者：赵李宁 Zhao Lining(Taijiu Expressway Branch of Shanxi Transportation Holdings Group Co.,Ltd.,Yangquan 045000,China)

机构地区：[1]山西交通控股集团有限公司太旧高速公路分公司,阳泉市045000

出　　处：《北方交通》2025年第3期47-50,共4页Northern Communications

摘　　要：针对深厚软土路基强度低、孔隙水压力过高等问题,为提高路基承载力和稳定性,依托某省道软土路基路段,采用真空联合堆载预压法对试验路段软土路基进行处治,竖向沉降速率控制标准为≤30mm/d。通过十字板剪切试验,得到软土路基沉降、孔隙水压力及排水固结情况。试验结果表明:与路基加固前相比,真空联合堆载预压处理后的路基抗剪强度提升2.58倍,含水率降低29.2%,孔隙比降低27.4%,直接快剪粘聚力增长79.6%。路基固结程度显著提升,达到预期效果。In response to the problems like low strength,high pore water pressure and so on of deep soft soil subgrade,in order to improve the bearing capacity and stability of the subgrade,the treatment on the soft soil subgrade of the test road section is carried out by using the vacuum combined preloading method based on the road section of soft soil subgrade of a province.The vertical settlement rate control standard is≤30mm/d.The settlement,pore water pressure,and drainage consolidation of soft soil subgrade are obtained through the cross plate shear test.The test results show that:compared with the condition before subgrade reinforcement,the shear strength of the subgrade after the vacuum combined preloading treatment is increased by 2.58 times,the moisture content is reduced by 29.2%,the porosity is reduced by 27.4%,and the direct fast shear cohesion is increased by 79.6%.The consolidation degree of the subgrade is significantly improved,achieving the expected effect.

关 键 词：深厚软土路基 真空联合堆载预压法 监测 路基加固 稳定性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]