|本期目录/Table of Contents|

[1]宋修广,李 进,于一凡,等.冲击碾压法快速处置粉土路基的应用研究[J].建筑科学与工程学报,2017,34(02):41-47.
 SONG Xiu-guang,LI Jin,YU Yi-fan,et al.Application Study of Impact Roller Compaction Method to Strengthen Silt Subgrade[J].Journal of Architecture and Civil Engineering,2017,34(02):41-47.
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冲击碾压法快速处置粉土路基的应用研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
34卷
期数:
2017年02期
页码:
41-47
栏目:
出版日期:
2017-03-30

文章信息/Info

Title:
Application Study of Impact Roller Compaction Method to Strengthen Silt Subgrade
作者:
宋修广李 进于一凡李新蔚张宏博
山东大学土建与水利学院
Author(s):
SONG Xiu-guang LI Jin YU Yi-fan LI Xin-wei ZHANG Hong-bo
School of Civil Engineering, Shandong University
关键词:
冲击碾压粉土路基虚铺厚度含水率压实度
Keywords:
impact roller compaction silt subgrade virtual paving thickness water content compaction degree
分类号:
-
DOI:
-
文献标志码:
A
摘要:
针对黄河冲积平原区粉土路基填料受含水率影响较大、难以晾晒、普通碾压技术难以压实、生产效率低的特点,选择冲击碾压法对路基分层填筑施工。通过调整路基分层填筑厚度和压实遍数进行现场冲击碾压试验,检测路基表面沉降量、峰谷高差、压实度及路基承载力,并对比分析了3种不同虚铺厚度粉土路基的冲击压实效果。结果表明:表层土体压实度达到或超过93%后,压实度增长曲线出现拐点,继续碾压对提高土体压实效果影响越来越小,较难使层底土体压实度达到96%;路基填料允许的含水率ω范围为ωopt-4%≤ω≤ωopt+4%(ωopt为最佳含水率);推荐的最佳虚铺厚度为0.8 m,最适宜冲击碾压遍数为20,最佳碾压速度为10~12 km·h-1;建议把沉降量和峰谷高差作为检测压实效果的辅助指标。
Abstract:
According to the characteristics of the Yellow River alluvial plain silt subgrade filling including influence by moisture content, difficult to dry, difficult to compact with ordinary rolling technology, and low production efficiency, the impact roller compaction method was chosen in construction. Through adjusting the subgrade layer thickness and compaction pass number, the impact roller compaction test was conducted to detect the surface settlement, peak valley depth, compaction degree and bearing capacity of subgrade. The impact compression effects of three virtual thickness silt subgrades were compared and analyzed. The results show that compaction degree curve appears inflection point when compaction degree of surface soil reaches or exceeds 93%, and the effect of continue rolling on improving compression degree of soil is getting smaller, then its difficult to improve compaction degree of bottom soil up to 96%. The allowed moisture content ?ω of subgrade filling can be controlled within ?ωopt-4%≤ω≤ωopt+4% (ωopt is optimum moisture content) .The recommend silt virtual paving thickness is 0.8 m, the optimal rolling pass number is 20, the optimal rolling speeds are 10-12 km·h-1. The surface settlement and peak valley depth should be taking as auxiliary indexes to evaluate the compaction effect..

参考文献/References:

相似文献/References:

[1]宋修广,陈晓光,于一凡.粉质粘土路基冲击压实动力响应数值模拟研究[J].建筑科学与工程学报,2016,33(02):24.
 SONG Xiu-guang,CHEN Xiao-guang,YU Yi-fan.Research on Numerical Simulation About Dynamic Response of Silty Clay Subgrade Under Impact and Grind[J].Journal of Architecture and Civil Engineering,2016,33(02):24.

备注/Memo

备注/Memo:
更新日期/Last Update: 2017-03-30