|本期目录/Table of Contents|

[1]罗嗣海,傅军健.冲击作用下饱和土性状的试验研究[J].地球科学与环境学报,2012,34(02):90-96.
 LUO Si-hai,FU Jun-jian.Laboratory Research on the Saturated Soil Behavior Under Impact[J].Journal of Earth Sciences and Environment,2012,34(02):90-96.
点击复制

冲击作用下饱和土性状的试验研究(PDF)
分享到:

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第34卷
期数:
2012年第02期
页码:
90-96
栏目:
工程地质
出版日期:
2012-06-20

文章信息/Info

Title:
Laboratory Research on the Saturated Soil Behavior Under Impact
作者:
罗嗣海1傅军健2
1.江西理工大学 建筑与测绘工程学院,江西 赣州 341000; 2.江西省吉安市公路勘察设计院,江西 吉安 343000
Author(s):
LUO Si-hai1 FU Jun-jian2
1. School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science andTechnology, Ganzhou 341000, Jiangxi, China; 2. Ji'an Institute of Highway Survey and Design of Jiangxi Province, Ji'an 343000, Jiangxi, China
关键词:
三轴条件 排水 冲击 孔隙水压力 体变 再固结 砂土 黏土
Keywords:
triaxial condition drainage impact pore water pressure volumetric change reconsolidation sand clay
分类号:
TU411
DOI:
-
文献标志码:
A
摘要:
在三轴条件下,对饱和土(砂土和黏土)进行排水与不排水条件下的冲击试验及冲击后再固结试验,对比研究了不同渗透性土在不同排水条件下的冲击动力响应和冲击后再固结性状。结果表明:饱和黏土不排水冲击时的孔隙水压力随冲击击数增加而升高并逐渐稳定,排水冲击时的孔隙水压力则是先达到峰值然后有所下降; 砂土不排水冲击时的冲击能量对孔隙水压力影响最明显; 饱和砂土不排水冲击时的轴向应变与冲击击数呈近似线性关系,饱和黏土冲击及饱和砂土排水冲击则呈近二次曲线关系; 饱和砂土不排水冲击后再固结阶段的孔隙水压力立即消散为0,同时体变迅速增大到一定值; 饱和黏土在冲击后再固结阶段的孔隙水压力在一定时间内逐渐消散完毕,同时体变逐渐增大; 饱和黏土排水冲击时,冲击阶段产生的体变占冲击引起总体变的39%~49%,冲击后再固结阶段产生的体变占51%~61%; 砂土和黏土的总体变均表现为排水冲击明显大于不排水冲击,改善冲击时的排水条件有利于提高加固效果。
Abstract:
Under the triaxial condition, tests of impact and reconsolidation after impact were conducted on saturated sand and clay with the drained and undrained conditions respectively; the dynamic response to impact and behavior of reconsolidation after impact under different drainage conditions for the soils with different penetrability were comparatively investigated. The results showed that the pore water pressure of saturated clay increased with blow number, and then gradually trended to be stable under undrained condition, while it dropped after reaching a peak under drained condition; impact energy had most significant influence on pore water pressure for sand under undrained condition; relationship between axial strain and blow number of saturated sand was approximately linear under undrained condition, while it was nearly quadratic for saturated sand under drained condition and saturated clay; pore water pressure immediately decreased to zero for saturated sand during reconsolidation after impact under undrained condition, and volumetric change instantly increased to a certain value; pore water pressure gradually decreased to zero within a given period for saturated clay during reconsolidation after impact under undrained condition, and volumetric change gradually increased; the volumetric changes of saturated clay during impact were 39%-49% of total volumetric changes, and the volumetric changes during reconsolidation after impact were 51%-61%; total volumetric changes for sand and clay under drained condition were larger significantly than that under undrained condition, and improving the drainage condition was favorable to increase reinforcement effect.

参考文献/References:

[1] 杨人凤,张永新,赵新荣.土的冲击压实试验研究[J].中国公路学报,2003,16(3):32-35. YANG Ren-feng,ZHANG Yong-xin,ZHAO Xin-rong.Research on Test of Impact Compaction About Soil[J].China Journal of Highway and Transport,2003,16(3):32-35.
[2] 石 刚,支喜兰,谢永利,等.冲击压实和强夯加固地基效果分析[J].交通运输工程学报,2006,6(4):52-56. SHI Gang,ZHI Xi-lan,XIE Yong-li,et al.Effect Ana-lysis of Percussive Compaction and Dynamic Compaction on Roadbed Reinforcement[J].Journal of Traffic and Transportation Engineering,2006,6(4):52-56.
[3] 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 Conslidation[J].Chinese Jounal of Geotechnical Engineering,1986,8(6):1-17.
[4] 韩文喜,张倬元,傅小敏,等.饱和土的强夯模拟试验[J].地质灾害与环境保护,1999,10(3):31-36. HAN Wen-xi,ZHANG Zhuo-yuan,FU Xiao-min,et al.Modelling Test of Dynamic Consolidation for Saturated Soil[J].Journal of Geological Hazards and Environment Preservation,1999,10(3):31-36.
[5] 白 冰,刘祖德.冲击荷载作用下饱和软黏土孔压增长与消散规律[J].岩土力学,1998,19(2):33-38. BAI Bing,LIU Zu-de.Growth and Dissipation of Pore Water Pressure in Saturated Soft Clay Under Impact Loading[J].Rock and Soil Mechanics,1998,19(2):33-38.
[6] 白 冰,章 光,刘祖德.冲击荷载作用下饱和软黏土的一些性状[J].岩石力学与工程学报,2002,21(3):423-428. BAI Bing,ZHANG Guang,LIU Zu-de.Some Characteristics of Saturated Soft Clay Under Impact Loading[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(3):423-428.
[7] 白 冰.饱和土体再固结变形特性若干问题研究[J].岩土力学,2003,24(5):691-695. BAI Bing.Study on Reconsolidation Characteristics of Saturated Soils[J].Rock and Soil Mechanics,2003,24(5):691-695.
[8] 孟庆山,汪 稔,雷学文,等.饱和软黏土在冲击荷载下的动力特性研究[J].岩土力学,2004,25(2):194-198. MENG Qing-shan,WANG Ren,LEI Xue-wen,et al.Dynamic Properties of Saturated Soft Clay Under Impact Loading[J].Rock and Soil Mechanics,2004,25(2):194-198.
[9] 孟庆山,汪 稔,刘观仕.冲击荷载下饱和软黏土的孔压和变形特性[J].水利学报,2005,36(4):467-472. MENG Qing-shan,WANG Ren,LIU Guan-shi.Experimental Study on Pore Water Pressure and Axial Strain of Saturated Soft Clay Under Impact Load[J].Journal of Hydraulic Engineering,2005,36(4):467-472.
[10] 孟庆山,汪 稔.冲击荷载下饱和软土动态响应特征的试验研究[J].岩土力学,2005,26(1):17-21. MENG Qing-shan,WANG Ren.Experimental Study on Dynamic Characteristics of Saturated Soft Clay Under Impact Loading[J].Rock and Soil Mechanics,2005,26(1):17-21.
[11] 罗嗣海,巩田捷.侧限条件下冲击作用对黏性土变形与强度性状的影响[J].工业建筑,2011,41(3):81-85. LUO Si-hai,GONG Tian-jie.Influence of Confined Impact on Deformation and Strength Behavior of Cohesive Soils[J].Industrial Construction,2011,41(3):81-85.
[12] 罗嗣海,胡 微,潘小青,等.冲击荷载作用后土压缩性状的室内试验研究[J].建筑科学,2012,28(3):38-42. LUO Si-hai,HU Wei,PAN Xiao-qing,et al.Laboratory Research on the Soil Compression Behavior After Impact[J].Building Science,2012,28(3):38-42.
[13] 罗嗣海,胡 微,潘小青,等.动、静荷载预压密后土压缩性状的对比研究[J].工业建筑,2011,41(10):68-71. LUO Si-hai,HU Wei,PAN Xiao-qing,et al.Comparison of Compression Behavior of Soil After Pre-densification by Static or Dynamic Loads[J].Industrial Construction,2011,41(10):68-71.
[14] 罗嗣海,傅军健,胡世丽.不同排水条件下饱和砂土的冲击性状[J].有色金属科学与工程,2011,2(6):29-33. LUO Si-hai,FU Jun-jian,HU Shi-li.Impact Properties of Saturated Sand Under Different Drainage Conditions[J].Nonferrous Metal Science and Engineering,2011,2(6):29-33.
[15] 郭 莹,陈 珍.成样方法对砂土静力三轴固结不排水剪切试验结果的影响[J].中国港湾建设,2010(2):30-34. GUO Ying,CHEN Zhen.Influence of Sample-preparing Methods on Results of Static Tri-axial Consolidation Undrained Test of Sand[J].China Harbour Engineering,2010(2):30-34.
[16] 南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003. Geotechnical Department of Nanjing Hydraulic Research Institute.Geotechnical Test Technical Manual[M].Beijing:China Communications House,2003.
[17] 朱思哲,刘 虔,包承纲,等.三轴试验原理与应用技术[M].北京:中国电力出版社,2003. ZHU Si-zhe,LIU Qian,BAO Cheng-gang,et al.The Tri-axial Test Principle and Application Technology[M].Beijing:China Electric Power Press,2003.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2012-05-03
基金项目:国家自然科学基金项目(50869002); 江西省自然科学基金项目(2008GZC003); 江西省教育厅科技项目(GJJ10486)
作者简介:罗嗣海(1966-),男,江西兴国人,教授,工学博士,E-mail:drsoil@163.com。

更新日期/Last Update: 2012-06-20