低路堤桩-筏复合地基沉降超限治理措施研究

Study on Treatment Measures for Settlement Overrun of Low Ramp Pile-raft Composite Foundation

依托某高速铁路低路堤桩-筏复合地基工程背景,在分析运营期路基沉降超限原因的基础上,充分考虑场地、设备及天窗施工等限制条件,提出一套低路堤桩-筏地基沉降超限处治技术措施,主要包括:路基坡脚处设置应力释放孔、路基底部花管注浆加固、更换垫块及抬高扣件.同时,结合处治前后实测沉降数据对处治效果进行评估.

Based on the analysis of the causes of overcrowding of roadbed during the operation period,a set of low embankment and raft foundation settlement was put forword by considering the conditions of the site,equipment and skylight construction. The technical measures include： the installation of the stress relief hole at the foot of the roadbed,the reinforcement of the flower at the bottom of the roadbed,the replacement of the pad and the lifting of the fastener. At the same time,combined with the measured data before and after treatment,the effect of treatment was assessed.