doi:10.16186/j.cnki.1673-9787.2019110009

Received:2019/11/04

Revised:2020/05/21

Published:2021/03/15

Influence of high-frequency vibration sinking piles on surrounding soils inKunming Dianchi lake special soil

LIU Sinan1, XIE Jianbin1,2, ZHANG Wenhao1, Gao Yang1, SHI Linfeng1, SONG Guili3

1.School of Architecture and Planning， Yunnan University， Kunming  650500 ， Yunnan， China;2.Kunming Junlong Geotechnical Engineering Co.， Ltd. ， Kunming  650021 ， Yunnan， China;3.Yunnan Hualing Bulding Design Co. ， Ltd. ， Kunming  650216 ， Yunnan， China

Abstract:In order to study the horizontal dynamic ， relying on Kunming Dianchi Lake International Convention and Exhibition Center， No. 4 block deep foundation pit steel tube supporting pile vibration sinking pile engineering example， through site survey and indoor geotechnical test， was established a corresponding 3D dynamic pile sinking model. Through comparative analysis， the horizontal dynamic response at different points in the vertical and horizontal space of the surrounding soil was used to study the effects of the displacement field， velocity field， and acceleration field of the surrounding soil under the 10 s excitation force of the high-frequency vibrating pile. Research results showed thatas the pile sark with time， the horizontal displacement and horizontal acceleration of the soil surrounding the steel pipe pile wall gradually increased， the speed of moving toward the inside of the steel pipe pile gradually decreasesd， and the speed of moving toward the outside of the steel pipe pilegradually increasesd. As the depth of the soil at the pipe wall increasesd， the horizontal displacement and horizontal acceleration of the soil at the pipe wall increased first and then decreased. When the depth was shallow ，the horizontal velocity of the soil was positive， when reaching a certain depth， the horizontal velocity of the soil was negative.

Key words:steel pipe pile;high-fraquency vibration;vibration pile sinking;squeezing effect;numerical simulation

 昆明滇池特殊土质下高频振动沉桩对周边土体的影响_刘思楠.pdf