CAJ | 학술논문

软弱地基对堤防稳定性有很大影响。本文采用数值计算方法分析了不同置换深度、不同的坡脚外置换宽度对堤防应力变形及稳定性影响规律。结果表明，当软土厚度一定时，随着置换厚度增大，新填筑堤防地基表面沉降减小，安全系数有所增大；当置换厚度一定时，增大堤脚外地基置换宽度对加固区堤身及地基变形影响不大，但对稳定性影响较大；置换深度越小，堤脚外加固宽度就越大。其成果对软基置换设计具有一定指导意义。
연약지기대제방은정성유흔대영향。본문채용수치계산방법분석료불동치환심도、불동적파각외치환관도대제방응력변형급은정성영향규률。결과표명，당연토후도일정시，수착치환후도증대，신전축제방지기표면침강감소，안전계수유소증대；당치환후도일정시，증대제각외지기치환관도대가고구제신급지기변형영향불대，단대은정성영향교대；치환심도월소，제각외가고관도취월대。기성과대연기치환설계구유일정지도의의。
The soft foundation has a great influence on the stability of embankment. The law of influence of different replacement depth and toe external width on the deformation and stability of the dyke is researched by numerical analysis. The results show that new levee foundation ground surface settlement decreases and the safety factor increases with the increase of the thickness of the filling replacement. When the replacement thickness is certain, the influence is not obvious by increasing replacement width of dike toe external field ,but there is a significant influence on the stability. The reinforced zone width of foundation should increase with replacement depth decrease. The results have certain significance to guide the design of soft base replacement.