Influence of towing speed on effectiveness of rolling dynamic compaction

被引:16
|
作者
Scott, Brendan T. [1 ]
Jaksa, Mark B. [1 ]
Mitchell, Peter W. [1 ,2 ]
机构
[1] Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia
[2] Aurecon, Adelaide, SA 5000, Australia
关键词
Rolling dynamic compaction (RDC); Optimum towing speed; Ground improvement; STRESSES; IMPACT;
D O I
10.1016/j.jrmge.2019.10.003
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The influence of towing speed on the effectiveness of the 4-sided impact roller using earth pressure cells (EPCs) is investigated. Two field trials were undertaken; the first trial used three EPCs placed at varying depths between 0.5 m and 1.5 m with towing speeds of 9-12 km/h. The second used three EPCs placed at a uniform depth of 0.8 m, with towing speeds of 5-15 km/h. The findings from the two trials confirmed that towing speed influences the pressure imparted to the ground and hence compactive effort. This paper proposes that the energy imparted to the ground is best described in terms of work done, which is the sum of the change in both potential and kinetic energies. Current practice of using either kinetic energy or gravitational potential energy should be avoided as neither can accurately quantify rolling dynamic compaction (RDC) when towing speed is varied. (C) 2019 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
引用
收藏
页码:126 / 134
页数:9
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