素混凝土桩和搅拌桩处理城市道路路基的原位试验

朱世哲, 陈秀亮, 徐日庆

中国公路学报 ›› 2007, Vol. 20 ›› Issue (1) : 7-13.

PDF全文下载(573 KB)
PDF全文下载(573 KB)
中国公路学报 ›› 2007, Vol. 20 ›› Issue (1) : 7-13.
论文

素混凝土桩和搅拌桩处理城市道路路基的原位试验

  • 朱世哲1, 陈秀亮2, 徐日庆1
作者信息 +

In-situ Experiment on Urban Road Subgrade Improved by Plain Concrete Pile and Mixed-in-place Pile

  • ZHU Shi-zhe1, CHEN Xiu-liang2, XU Ri-qing1
Author information +
文章历史 +

摘要

在较差地质条件、不同填筑材料情况下, 用素混凝土桩和搅拌桩进行了城市道路路基处理的原位试验, 分析了超孔隙水压力、桩间土分层沉降、附加有效应力、路基深层土的侧向位移等数据。结果表明:在正常荷载作用下, 素混凝土桩复合地基浅层应力向桩体集中, 并通过桩向深层扩散, 桩顶和桩底的刺入较为明显, 有单桩效应;而对于搅拌桩, 大部分桩间土和桩没有相对位移, 形成了一个加固整体, 应力在桩顶和桩底较集中, 大部分荷载传到了桩底桩间土和下卧层中。

Abstract

Authors analyzed in-situ experiment data of subgrade improved by plain concrete and mixed-in-place pile under bad geological condition and condition of different filling construction material including excess pore pressure, layer settlement of soils between piles, additional effective stress and lateral displacement. It shows that surface layer stress of composite subgrade with plain concrete pile improved by plain concrete is focused on pile and is diffused to deep layer; there is displacement between pile and soil on the tip and bottom of pile, then, it exists the single pile effect. But concerning subgrade improved by the mixed-in-place pile, it is reinforcement unitarity, so there isnt relative displacement between pile and soil; the stress is focused on the tip and bottom of pile and load is transferred to soil under the bottom of pile and substratum.

关键词

道路工程 / 城市道路路基 / 试验研究 / 素混凝土桩 / 搅拌桩 / 单桩效应 / 加固整体

Key words

road engineering / urban road subgrade / experimental research / plain concrete pile / mixed-in-place pile / single pile effect / reinforcement unitarity

引用本文

导出引用
朱世哲, 陈秀亮, 徐日庆. 素混凝土桩和搅拌桩处理城市道路路基的原位试验[J]. 中国公路学报, 2007, 20(1): 7-13
ZHU Shi-zhe, CHEN Xiu-liang, XU Ri-qing. In-situ Experiment on Urban Road Subgrade Improved by Plain Concrete Pile and Mixed-in-place Pile[J]. China Journal of Highway and Transport, 2007, 20(1): 7-13
中图分类号: U416.1   

参考文献

[1] 陈艳平, 赵明华, 陈昌富, 等.土工格室碎石垫层-碎石桩复合地基相似模型试验[J].中国公路学报, 2006, 19(1):17-22.
CHEN Yan-ping, ZHAO Ming-hua, CHEN Chang-fu, et al.Similarity Model Test of Geocell Reinforced Gravel Mattress and Gravel Pile Composite Foundation[J].China Journal of Highway and Transport, 2006, 19(1):17-22.
[2]陈小庭, 夏元友, 芮 瑞, 等.管桩加固软土路基桩土应力现场试验[J].中国公路学报, 2006, 19(3):12-17.
CHEN Xiao-ting, XIA Yuan-you, RUI Rui, et al.Field Experiment of Pile-soil Stress of Soft Subgrade Reinforced by Pre-stressed Concrete Piles[J].China Journal of Highway and Transport, 2006, 19(3):12-17.
[3]曹卫平, 陈仁朋, 陈云敏.桩承式加筋路堤桩体荷载分担比计算[J].中国公路学报, 2006, 19(6):1-6.
CAO Wei-ping, CHEN Ren-peng, CHEN Yun-min.Calculation for Pile Efficacy of Pile-supported Reinforced Embankments[J].China Journal of Highway and Transport, 2006, 19(6):1-6.
[4]冯忠居, 谢永利, 李 哲, 等.大直径超长钻孔灌注桩承载性状[J].交通运输工程学报, 2005, 5(1):24-27.
FENG Zhong-ju, XIE Yong-li, LI Zhe, et al.Bearing Property of Large-diameter Over-length Nonplacement Pile[J].Journal of Traffic and Transportation Engineering, 2005, 5(1):24-27.
[5]陈仁朋, 许 峰, 陈云敏, 等.软土地基上刚性桩-路堤共同作用分析[J].中国公路学报, 2005, 18(3):7-13.
CHEN Ren-peng, XU Feng, CHEN Yun-min, et al.Analysis of Behavior of Rigid Pile-supported Embankment in Soft Ground[J].China Journal of Highway and Transport, 2005, 18(3):7-13.
[6]方 磊, 谢永利.柔性基础下复合地基桩土应力比模型试验[J].长安大学学报:自然科学版, 2005, 25(2):30-32.
FANG Lei, XIE Yong-li.Model Experiment of Pile-soil Stress Ratio of Composite Ground Under Flexible Foundation[J].Journal of Changan University:Natural Science Edition, 2005, 25(2):30-32.
[7]刘 杰, 张可能.柔性桩与土相互作用非线性分析的增量传递矩阵法[J].中国公路学报, 2005, 18(1):34-39.
LIU Jie, ZHANG Ke-neng.Increment Transfer Matrix Method of Nonlinear Analysis of Interaction for Flexible Piles and Soil[J].China Journal of Highway and Transport, 2005, 18(1):34-39.
[8]马克生, 梁仁旺, 白晓红.水泥搅拌桩复合地基承载力的试验确定[J].岩石力学与工程学报, 2004, 23(15):2 652-2 654.
MA Ke-sheng, LIANG Ren-wang, BAI Xiao-hong.Determination of Bearing Capacity of Cement Mixing Composite Foundation by Test[J].Chinese Journal of Rock Mechanics and Engineering, 2004, 23(15):2 652-2 654.
[9]郑 刚, 王长祥, 顾晓鲁.软土中超长水泥搅拌桩复合地基承载力研究[J].岩土工程学报, 2002, 24(6):675-679.
ZHENG Gang, WANG Chang-xiang, GU Xiao-lu.Bearing Capacity of Composite Foundation with Long Cement Treated Column in Soft Soil[J].Chinese Journal of Geotechnical Engineering, 2002, 24(6):675-679.
[10]段继伟, 龚晓南, 曾国熙.水泥搅拌桩的荷载传递规律[J].岩土工程学报, 1994, 16(4):1-8.
DUAN Ji-wei, GONG Xiao-nan, ZENG Guo-xi.Load Transfer Behavior of Cement Treated Soil Column[J].Chinese Journal of Geotechnical Engineering, 1994, 16(4):1-8.
[11]池跃君, 宋二祥.素混凝土桩复合地基荷载传递机理的试验研究[J].工业建筑, 2001, 31(4):39-42.
CHI Yue-jun, SONG Er-xiang.Study on Loads Transferring Mechanism of Composite Grounds with Concrete Piles[J].Industrial Construction, 2001, 31(4):39-42.
[12]宋法宝, 陈永辉, 刘汉龙.低标号素混凝土桩在杭金衢高速公路中的应用[J].河海大学学报:自然科学版, 2004, 32(5):583-586.
SONG Fa-bao, CHEN Yong-hui, LIU Han-long.Application of Low-grade Plain Concrete Piles for a Section of Hangjinqu Expressway[J].Journal of Hohai University:Natural Sciences, 2004, 32(5):583-586.
[13]吴曼真.杂填土地基的利用[J].岩土工程学报, 1993, 15(6):103-109.
WU Man-zhen.The Utilization of Mix Soil[J].Chinese Journal of Geotechnical Engineering, 1993, 15(6):103-109.
[14]钟才根, 丁文其, 王茂和, 等.神经网络模型在高速公路软基沉降预测中的应用[J].中国公路学报, 2003, 16(2):31-34.
ZHONG Cai-gen, DING Wen-qi, WANG Mao-he, et al.Application of Artificial Neural Network in Settlement Prediction of Highway Soft Foundation[J].China Journal of Highway and Transport, 2003, 16(2):31-34.
[15]JUAN M, PESTANA M, CHRISTOPHER E H, et al.Soil Deformation and Excess Pore Pressure Field Around a Closed-ended Pile[J].Journal of Geotech, 2002, 128(1):1-12.
[16]邓卫东, 张兴强, 陈 波, 等.路基不均匀沉降对沥青路面受力变形影响的有限元分析 [J].中国公路学报, 2004, 17(1):12-15.
DENG Wei-dong, ZHANG Xing-qiang, CHEN Bo, et al.Nonlinear FEM Analysis of Influence of Asphalt Pavement Under Non-homogeneous Settlement of Roadbed[J].China Journal of Highway and Transport, 2004, 17(1):12-15.

基金

国家自然科学基金项目(50678158)
PDF全文下载(573 KB)

1874

Accesses

0

Citation

Detail

段落导航
相关文章

/