全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

强夯法加固无黏性土路基的现场试验与数值分析

, PP. 1-37

Keywords: 道路工程,强夯,无黏性土,现场试验,数值分析

Full-Text   Cite this paper   Add to My Lib

Abstract:

为了评估无粘性土路基强夯加固效果,结合现场试验成果,采用FLAC3D有限差分软件进行了数值模拟,重点针对夯击能2000kN·m时动应力衰减规律进行了对比分析。研究结果表明强夯对无黏性土路基填料的加固效果明显,强夯竖向影响深度大于径向影响范围,径向动应力衰减速度较竖向要快;针对该类填料得出有效加固深度约6.0m,径向加固宽度约6.04m,以及强夯加固Menard公式修正系数α值。同时,还研究了强夯设计参数(锤重、落距、锤径等)对强夯加固效果的影响,并对相同夯击能下,几种不同锤重-落距组合形式的加固效果进行了探讨,得出夯锤重量及落距是影响加固无粘性土效果的主要因素,而夯锤面积、夯锤-落距组合形式仅影响表层约3m内土体加固效果。

References

[1]  王克忠,方锐,候岩峰,等. 强夯加固湿陷性黄土路基的瞬态动力数值模拟[J].北京科技大学学报,2005,27 (3):283-286.WANG Ke-zhong,FANG Rui,HOU Yan-feng,et al.Numerical Simulation of Collapsible Loess Foundation Reinforced by Dynamic Consolidation Technique [J] .Journal of University of Science and Technology Beijing,2005,27 (3):283-286.
[2]  肖勤. 高含水量粉土地基强夯法加固研究[D].上海: 同济大学,2004.XIAO Qin. Research on Treatment of High Water Content Silty Foundation by Dynamic Compaction Method [D] .Shanghai: Tongji University,2004.
[3]  刘利平,刘晶晶,石明禄. 强夯作用下饱和软土地层的沉降和变形性状[J].地下空间与工程学报,2011,7 (6):1222-1226.LIU Li-ping, LIU Jing-jing, SHI Ming-lu. The Characteristics of Settlement and Deformation of Saturated Soft Soil under Dynamic Loading [J].Chinese Journal of Underground Space and Engineering, 2011, 7 (6) :1222-1226.
[4]  何淑军,李鸿江,赵敏学,等. 西北干旱湿陷性黄土区增湿高能级强夯试验研究[J].铁道工程学报,2011 (7):9-15.HE Shu-jun, LI Hong-jiang, ZHAO Min-xue, et al.Experimental Research on the High Energy Level Dynamic Compaction with Humidification Operation to Collapsible Loess in the Arid Region in Northwest China [J].Journal of Railway Engineering Society,2011 (7):9-15.
[5]  孟祥彬,姚凯,吴庆东,等. 强夯加固废弃铁矿渣路基的动应力扩散规律实验研究[J].山东大学学报:工学版,2012,42 (1):87-92.MENG Xiang-bin,YAO Kai,WU Qing-dong,et al. Test Study on Soil Dynamic Stress Diffusion of a Waste Iron Slag Embankment during Dynamic Consolidation [J] .Journal of Shandong University: Engineering Science Edition,2012,42 (1):87-92.
[6]  胡振南,王桂尧,黄庆,等. 强夯法处理石灰岩碎石路基试验研究[J].公路交通科技,2006,23 (12) :45-50.HU Zhen-nan,WANG Gui-yao,HUANG Qing,et al.Experimental Research for Dynamic Compaction to Improve Crushed Limestone Embankment [J].Journal of Highway and Transportation Research and Development,2006,23(12):45-50.
[7]  JGJ79—2002,建筑地基处理技术规范[S] .JGJ79—2002,Technical Code for Ground Treatment of Buildings [S] .
[8]  郝华庚. 高能级强夯加固机理及环境影响数值分析[D].上海: 同济大学,2008. HAO Hua-geng.Numerical Analysis on the Mechanism and Environmental Effect of High Energy Dynamic Compaction[D].Shanghai: Tongji University,2008.
[9]  孔令伟,袁建新. 强夯时地基土的应力场分布特征及应用[J].岩土力学,1999,20 (3):13-19.KONG Ling-wei,YUAN Jian-xin. Stress Field Distribution Characteristics of Foundation during Dynamic Consolidation and Its Application [J].Rock and Soil Mechanics,1999,20 (3):13-19.
[10]  叶观宝,陈望春,徐超. 强夯法地基处理有效加固深度的分析研究[J].上海地质,2003 (3):22-25.YE Guan-bao,CHEN Wang-chun,XU Chao. Analysis on Effective Improvement Depth of Dynamic Consolidation[J].Shanghai Geology,2003 (3):22-25.
[11]  王成华. 强夯地基加固深度估算方法述评[J].地基处理,1991,2 (1):20-24.WANG Cheng-hua. Overview: Estimation Method of the Effective Improvement Depth of Dynamic Consolidation [J].Ground Improvement,1991,2 (1):20-24.
[12]  张平仓,汪稔. 强夯法施工实践中加固深度问题浅析[J].岩土力学,2000,21 (1):76-80.ZHANG Ping-cang,WANG Ren. A Study of Dynamic Consolidation Depth in Engineering Practice [J].Rock and Soil Mechanics,2000,21 (1):76-80.
[13]  詹金林,水伟厚,何立军. 高能级强夯加固机理的数值模拟[J].水利水电科技进展,2008,26 (6):15 -19.ZHAN Jin-lin,SHUI Wei-hou,HE Li-jun. Research on the Mechanics of High Energy Level Dynamic Compaction with Numerical Method [J].Advances in Science and Technology of Water Resources, 2008, 26 (6):15-19.
[14]  杨建国,彭文轩,刘东燕. 强夯法加固的主要设计参数研究[J].岩土力学,2004,25 (8):1335-1339.YANG Jian-guo, PENG Wen-xuan, LIU Dong-yan.Research of Choosing Tamping Factors for Dynamic Consolidation Method [J].Rock and Soil Mechanics,2004,25 (8):1335-1339.
[15]  钱家欢,钱学德,赵维炳,等. 动力固结的理论与实践[J].岩土工程学报,1986,8 (6):1-17.QIAN Jia-huan,QIAN Xue-de,ZHAO Wei-bing,et al.Theory and Practice of Dynamic Consolidation [J] .Chinese Journal of Geotechnical Engineering,1986,8(6):1-17.
[16]  罗恒,邹金锋,李亮,等. 红砂岩碎石土高填方路基强夯加固时的动应力扩散及土体变形试验研究[J] .岩石力学与工程学报,2007,26 (1):2701-2706.LUO Heng,ZOU Jin-feng,LI Liang,et al. Test Study on Dynamic Stress Diffusion and Deformation during Dynamic Compaction in Roadbed Primed with Large Granule Red Sandstone [J].Chinese Journal of Rock Mechanics and Engineering,2007,26 (1):2701-2706.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133