铁道科学与工程学报
鐵道科學與工程學報
철도과학여공정학보
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
2010年
1期
21-27
,共7页
高频液压振动锤%振动沉桩%超孔隙水压力%数值分析
高頻液壓振動錘%振動沉樁%超孔隙水壓力%數值分析
고빈액압진동추%진동침장%초공극수압력%수치분석
high frequency hydraulic vibratory hammer%vibratory-driving technique%excess pore pressure%numerical analysis
考虑高频振动沉桩过程引起地基中超静孔隙水压力增长情况,研究了孔压沿桩径方向与轴向的大小及分布规律,并同时对高频振动沉桩引起的孔压性状的主要影响因素进行探讨.研究结果表明:打桩过程中超静孔隙水压力的增长性状对其打桩的可打入性有很大的影响,有地下水存在时,高频振动沉桩引起孔压的增加有利于桩的贯入,因而桩的贯入位移大幅度增加.
攷慮高頻振動沉樁過程引起地基中超靜孔隙水壓力增長情況,研究瞭孔壓沿樁徑方嚮與軸嚮的大小及分佈規律,併同時對高頻振動沉樁引起的孔壓性狀的主要影響因素進行探討.研究結果錶明:打樁過程中超靜孔隙水壓力的增長性狀對其打樁的可打入性有很大的影響,有地下水存在時,高頻振動沉樁引起孔壓的增加有利于樁的貫入,因而樁的貫入位移大幅度增加.
고필고빈진동침장과정인기지기중초정공극수압력증장정황,연구료공압연장경방향여축향적대소급분포규률,병동시대고빈진동침장인기적공압성상적주요영향인소진행탐토.연구결과표명:타장과정중초정공극수압력적증장성상대기타장적가타입성유흔대적영향,유지하수존재시,고빈진동침장인기공압적증가유리우장적관입,인이장적관입위이대폭도증가.
The numerical analysis were performed to study the developing behaviors of excess pore pressure during pile driving using high frequency hydraulic vibratory.The excess pore pressure behaviors varying along radial and shaft of a pile were analyzed.The results show that the excess pore pressure is helpful to pile divring and pile penetration speed increases with the increase of excess pore pressure.
