Quantitative research and evaluation on capacity strengthening of vibration on impact compaction(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年03期
- Page:
- 102-111
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Quantitative research and evaluation on capacity strengthening of vibration on impact compaction
- Author(s):
- WANG Tie-qing; YANG Ren-feng; Yushanjiang-Yibulayin; MA Yu-ping
- (1.Key Laboratory of Road Construction Technology & Equipment of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China; 2. School of Mechanical & Electronic Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; 3. Xinjiang Communications Construction Administrative Bureau, Urumqi 830000, Xinjiang, China; 4. Shaanxi Construction Machinery Vehicle & Material Cooperation, Xi’an 710001, Shaanxi, China)
- Keywords:
- road engineering; impact compaction; vibration; compaction capacity; loess; evaluation
- PACS:
- U415.521;U 416.1
- DOI:
- -
- Abstract:
- In order to reveal the capacity strengthening effect of vibration on impact compaction, this paper used impact compactor in compaction test of loess, which conducted impact compaction on the loess with vibration effect at the same time. And comparing with the pure impact compaction, this paper quantitatively analyzed and evaluated the impact compactors’ compaction capacity before and after the vibration being applied from four aspects of compression strength and line pressure, compaction energy, stress characteristics and compaction depth characteristics. The results show that with the vibration effect, the impact compactors’ compression strength and line pressure both increase by 44%, and the excitation intensity increases by 41%; compaction uniformity is improved; with the increase of rolling times, growth rates of compressive stress in three deep layers are similar, and increase after applying vibration effect; SEI (stress energy index) decreases with the increase of layer depth; SEI increases in each layer after applying vibration effect, and its growth rates in upper, middle and lower layers are respectively 23.1%, 32.8% and 51.9%; compressive stress improves in the loess layers of all depths, and compressive stress increases more greatly with the increase of rolling times; compaction degrees in upper, middle and lower layers increase by 8.92%, 9.02% and 8.92% respectively; and the average slope of compaction characteristic curves increases by 86.2%. It indicates that the role of vibration is obvious on the impact compaction capacity strengthening.
Last Update: 2016-06-12