Experimental study on the disturbance characteristics of saturated sand under radial vibration excitation
LI Xiaolong1，2，CHEN Yongli1，2，XIAO Weifan1，2，MA Peng3，ZHONG Yanhui1，2，ZHANG Bei1，2，WANG Fuming1，2
(1. School of Water Conservancy and Transportation，Zhengzhou University，Zhengzhou，Henan 450001，China；2. National and Local Engineering Laboratory of Major Infrastructure Detection and Rehabilitation Technology，Zhengzhou，Henan 450001，China；3. Henan Luhun Reservoir Administration，Luoyang，Henan 471032，China)
Abstract：To investigate the disturbance effect of radial vibration excitation on saturated sand，the vibration test system with radial excitation capability and adjustable frequency was developed. Disturbance tests on saturated sand were conducted using this system under vibration frequencies ranging from 10 to 50 Hz. The spatiotemporal evolution and distribution characteristics of the disturbance effect induced by radial vibration excitation were analyzed. The results indicated that，within the scope of the test conditions，the pore water pressure at each measurement point initially increased，and after reaching its peak，gradually decreased and stabilized under vibration excitation. It was observed that as the vibration frequency increased，the degree of disturbance to the saturated sand became more severe，with a gradual increase in excess pore water pressure，excess pore pressure ratio，liquefaction duration，and vibration acceleration at each measurement point. At the vibration frequency of 30 Hz，some measurement points reached liquefaction state，while at 40 Hz and 50 Hz，all measurement points entered liquefaction state. Moreover，as the depth increased，the pore pressure at each measurement point during vibration was higher，the peak was reached earlier，and the liquefaction duration was shorter. The soil near the middle of the vibrator experienced the most severe disturbance，with measurement points in this location entering liquefaction state earliest，and the amplitude of pore pressure oscillation，relative oscillation amplitude，and peak excess pore pressure ratio were all higher at these measurement points compared to those at both ends of the soil. Additionally，the closer the measurement points were to the vibration center along the radial direction，the greater the vibration acceleration，the higher the maximum excess pore pressure ratio，the earlier the entry into liquefaction state，and the longer the duration of liquefaction. These findings provide guidance for selecting grouting timing，setting grouting outlet positions，and choosing vibration parameters，laying a foundation for further research on radial vibration grouting tests.
LEE M S，KIM M S，LEE S D，et al. Effect of vibratory injection on grout permeation characteristics[J]. Proceedings of the Korean Society of Geotechnical Engineering，2010，26(7)：37-47.
[2]
HAN S H，YEA G G，KIM H Y. Improvement effects of cement grouting using vibration method through a field test[J]. Journal of the Korean Geo-Environmental Society，2014，15(5)：23-29.
[3]
SEO M B，KWON S H，LEE B J. Improvement of grouting by short-period vibration energy[J]. Journal of the Korean Geo-Environmental Society，2015，16(7)：35-42.
[4]
KIM B K，PARK J J，KWON Y S，et al. Groutability enhancement effect of oscillatory injection in cement-based permeation grouting[J]. Geotechnical Testing Journal，2019，42(1)：64-85.
[5]
LIU Q S，XU X Y，TANG X H. A numerical study of the influence of cyclic grouting and consolidation using TOUGH2[J]. Bulletin of Engineering Geology and the Environment，2021，80：145-155.
[6]
窦金熙，张贵金，张 熙，等. 砂质土体脉动注浆浆-土耦合动力响应分析[J]. 岩土力学，2021，42(12)：3 315-3 327.(DOU Jinxi，ZHANG Guijin，ZHANG Xi，et al. Dynamic response analysis of slurry-soil coupling in sandy soil based on pulsating grouting[J]. Rock and Soil Mechanics，2021，42(12)：3 315-3 327.(in Chinese))
[7]
田素川. 脉冲压力作用下裂隙岩体浆液扩散及累积损伤机理[硕士学位论文][D]. 徐州：中国矿业大学，2021.(TIAN Suchuan. Mechanism of slurry diffusion and cumulative damage in fractured rock mass under pulse pressure[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2021.(in Chinese))
[8]
王星华，周海林，杨秀竹，等. 振动注浆原理及其理论基础[M]. 北京：中国铁道出版社，2007：1-6.(WANG Xinghua，ZHOU Hailin，YANG Xiuzhu，et al. Vibration grouting principle and its theoretical basis[M]. Beijing：China Railway Publishing House，2007：1-6.(in Chinese))
[9]
周海林. 振动注浆中的砂土液化研究[硕士学位论文][D]. 长沙：中南大学，2002.(ZHOU Hailin. Study on the sad liquefaction in the process of vibrating grouting[M. S. Thesis][D]. Changsha：Central South University，2002.(in Chinese))
[10]
雷金山，阳军生，杨秀竹. 饱和砂土振动注浆的有限元模拟[J]. 振动与冲击，2010，29(9)：235-237.(LEI Jinshan，YANG Junsheng，YANG Xiuzhu. Finite element simulation on dynamic grouting in saturated sand[J]. Journal of Vibration and Shock，2010，29(9)：235-237.(in Chinese))
[11]
马成伟. 粉细砂层声频振动注浆模拟试验研究[硕士学位论文][D]. 北京：中国地质大学(北京)，2017.(MA Chengwei. Experimental study on audio frequency vibration grouting in fine silty sand layer[M. S. Thesis][D]. Beijing：China University of Geosciences(Beijing)，2017. (in Chinese))
[12]
白士新. 粉细砂地层声频振动钻进注浆机理研究[博士学位论文][D]. 北京：中国地质大学(北京)，2018.(BAI Shixin. Research on mechanism of sonic vibration drilling grouting in the silty fine sand formation[Ph. D. Thesis][D]. Beijing：China University of Geosciences (Beijing)，2018.(in Chinese))
[13]
WANG Y，XIA B R，WANG Z Q，et al. Experimental study on sonic vibration grouting in fine silty sand layer[J]. Advances in Civil Engineering，2018，2018(PT.4)：1-7.
[14]
杨秀竹. 静动力作用下浆液扩散理论与试验研究[博士学位论文][D]. 长沙：中南大学，2005.(YANG Xiuzhu. Study on grout diffusion theory and experiments under static or dynamic loading[Ph. D. Thesis][D]. Changsha：Central South University，2005.(in Chinese))
[15]
凌 晨. 振动注浆中砂土液化判别与浆液扩散规律模拟研究[硕士学位论文][D]. 哈尔滨：哈尔滨工业大学，2005.(LING Chen. Study on the discrimination of sand liquefaction and the simulation of grout diffusion in vibration grouting[M. S. Thesis][D]. Harbin：Harbin Institute of Technology，2005.(in Chinese))
[16]
李晓广. 高频机械振动下的砂土液化特性及其应用[硕士学位论文][D]. 上海：上海交通大学，2011.(LI Xiaoguang. The characteristics of silt liquefaction induced by a vibrator with super high frequency and its applications[M. S. Thesis][D]. Shanghai：Shanghai Jiao Tong University，2011.(in Chinese))
2024, Vol. 43 
