Dynamic Compaction Model Tests for the Characteristics of Red Clay Under equal Energy Level

被引：15

作者：

Yuan H.-P. ^{[1
,2
]}

Liu M. ^{[1
]}

Li W. ^{[1
]}

Wang Y.-X. ^{[1
]}

机构：

[1] School of Civil Engineering, Hefei University of Technology, Hefei, 230009, Anhui

[2] Hunan Province Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan

来源：

Geotechnical and Geological Engineering | 2018年 / 36卷 / 3期

基金：

中国国家自然科学基金;

关键词：

Dynamic characteristics; Dynamic compaction; Model tests; Red clay; Tamping energy;

D O I：

10.1007/s10706-017-0409-3

中图分类号：

学科分类号：

摘要：

Red clay has obvious nonlinear dynamic characteristics during dynamic compaction. In this paper, based on equal energy level, the dynamic compaction model tests on red clay under different testing programs were conducted. Dynamic stress, duration of dynamic compaction and crater depth were measured. During dynamic compaction, the distribution and the variation of dynamic stress and the reinforcement effect were analyzed. The best fitting equation of crater depth was established. Test results show that during dynamic compaction, the peak dynamic stress decreased with the depth. In addition, dynamic stress at each point had obvious time lag. By increasing drop numbers, the peak dynamic stress in soil also increased. Until the peak dynamic stress variation fluctuated within a certain range and also the depth, the optimum number of the drop was achieved. When single tamping energy was the same, the peak dynamic stress with heavier tamper was larger than that with lighter tamper at same point. Dimensional analysis was applied to obtain the fitting equation of crater depth. The parameters of fitting equation demonstrated that the influence of the weight of tamper on crater depth was greater than that of the drop height under the identical tamping energy. Consequently, the utilization efficiency and reinforcement effects of heavier tamper with lower drop height are greater than that of lighter tamper with higher drop height at an identical energy level. © 2017, Springer International Publishing AG, part of Springer Nature.

引用

页码：1873 / 1883

页数：10

共 20 条

[1]

Asaka Y., Improvement of fine-grained reclaimed ground by dynamic compaction method, Japanese Geotech Soc Spec Publ, 2, 59, pp. 2038-2042, (2016)

[2]

Cai J., Wang Y.Y., Luo M.D., Model tests on the layout of punning position in dynamic compaction for loess, Appl Mech Mater, 405-408, 11, pp. 304-309, (2013)

[3]

Ding J.H., Liang J.G., Wang W., Dynamic characteristics analysis on wind-blown sand ground under dynamic compaction vibration, World J Eng Technol, 2, pp. 171-178, (2014)

[4]

Feng S.J., Du F.L., Shi Z.M., Shu W.H., Tan K., Field study on the reinforcement of collapsible loess using dynamic compaction, Eng Geol, 185, pp. 105-115, (2015)

[5]

Hajialilue-Bonab M., Zare F.S., Investigation on tamping spacing in dynamic compaction using model tests, Proc Inst Civ Eng Ground Improv, 167, 3, pp. 219-231, (2014)

[6]

Han Y.H., Dong Y.L., Wang T.L., Experiment study of loess-filled embankment under dynamic compaction, Open Civ Eng J, 9, pp. 644-649, (2015)

[7]

Jafarzadeh F., Dynamic compaction method in physical model tests, Scientia Iranica, 13, 2, pp. 187-192, (2006)

[8]

Jia M.C., Zhao Y., Zhou X.J., Field studies of dynamic compaction on marine deposits, Mar Georesour Geotechnol, 34, 4, pp. 313-320, (2016)

[9]

Kundu S., Viswanadham B.V.S., Studies to evaluate the impact of tamper on the depth of improvement in dynamic compaction, Japanese Geotech Soc Spec Publ, 2, 59, pp. 2033-2037, (2016)

[10]

Liu J.H., Yuan J.B., Xiong H., Dynamic compaction treatment technology research of red clay soil embankment in southern mountains, J Cent South Univ Technol, 15, s2, pp. 050-057, (2008)

← 1 2 →