基坑降水对京沪高速铁路CFG桩—筏复合地基沉降的影响分析

摘要

通过现场试验,对济南西站站房基坑降水对京沪高速铁路路基沉降的影响进行探讨和研究,结果表明:基坑降水对桩筏复合地基同一断面不同桩长处地基的影响程度不同,桩长越长所受影响越小,35 m PHC桩处地基所受影响小于25 m CFG桩处地基,25 m CFG桩处地基所受影响小于15 m CFG桩处地基.%The paper discusses and researches the influence of foundation pit dewatering of Ji'nan west railway station on the settlements of composite foundation of Beijing - Shanghai high-speed railway by means of field tests. Results showed that foundation pit dewatering had different degrees of effect on the settlements of composite foundation in the same cross-section with different pile lengths. The longer pile length the smaller the impact. The impact of 35 m PHC pile was less than 25 m CFG pile, and the impact of 25 m CFG pile was less than 15 m CFG pile.