[1]石名磊,邓学钧,钱明权,等.强夯技术处理饱和土地基的试验研究[J].东南大学学报(自然科学版),2001,31(3):15-19.[doi:10.3969/j.issn.1001-0505.2001.03.004]
 Shi Minglei,Deng Xuejun,Qian Mingquan,et al.Experimental Study on the Dynamic Compaction to Improve Saturated Clay[J].Journal of Southeast University (Natural Science Edition),2001,31(3):15-19.[doi:10.3969/j.issn.1001-0505.2001.03.004]
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强夯技术处理饱和土地基的试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
31
期数:
2001年第3期
页码:
15-19
栏目:
土木工程
出版日期:
2001-05-20

文章信息/Info

Title:
Experimental Study on the Dynamic Compaction to Improve Saturated Clay
作者:
石名磊 邓学钧 钱明权 李文圣
东南大学岩土工程研究所,南京 210096
Author(s):
Shi Minglei Deng Xuejun Qian Mingquan Li Wensheng
Institute of Geotechnical Engineering, Southeast University,Nanjing 210096, China)
关键词:
强夯 效果检测 失效点概率 时效性
Keywords:
dynamic compaction verification testing probability of failure spots aging effects
分类号:
TU441.6
DOI:
10.3969/j.issn.1001-0505.2001.03.004
摘要:
根据强夯加固饱和土地基的机理,依托一工程实例,以及强夯效果检测的实测数据,系统研究了饱和粘性土地基强夯后的强度特征.在强夯检验中,采用了原位和室内试验测定强夯后土的强度和压缩性,并对试验数据进行了统计分析.原位试验指标的随机特性采用左截尾正态分布的概率密度函数来描述.根据结构可靠性分析原理成功地提出了地基土失效点概率的概念,并将其应用于强夯加固效果的综合评定.最后,对强夯加固饱和土地基失败的原因进行了分析,并对强夯地基强度随时间的增长而增长,即时效性这一新的领域进行了初步探讨.
Abstract:
On the basis of the mechanical theory of dynamic compaction to improve saturated clay, the strength characters of the clay improved by dynamic compaction are discussed systematically from one case history and the results of verification test. Both in situ tests and laboratory tests were used to measure properties of the soils such as the strength and compressibility improved by dynamic compaction, and the values of the tests are analyzed statistically. The indexes of field tests were represented by the normal distribution probability density function for its values to truncate it below zero. The probability of failure spots in the ground is successfully proposed based on the principle of structure reliability analysis to estimate synthetically the quality of the soft soils improved by dynamic compaction. Finally, the cause responsible for the failure in the saturated clay improved by dynamic compaction is presented, and the strength gain of dynamically compacted soils with time, called the aging effects, as a new problem is discussed primarily.

参考文献/References:

[1] Vernon R Schaefer.Dynamic compaction.In:Vernon R Schaefer,ed.Ground Improvement/Ground Reinforced/Ground Treatment Developments 1987~1997,Geotechnical Special Publication No.69.Virginia:ASCE,1998.3~26
[2] 中华人民共和国原城乡建设环境保护部.GBJ7—89建筑地基基础设计规范.北京:中国建筑工业出版社,1989.76
[3] Robert E Melchers.Structural reliability analysis and prediction.England:John Wiley & Sons Ltd,1999.15~25,528~330
[4] 郑颖人,陆新.强夯加固软粘土地基的理论和工艺研究.岩土工程学报,2000,22(1):18~22
[5] Lukas R G.Delayed soil improvement after dynamic compaction.In:Vernon R Schaefer,ed.Ground Improvement/Ground Reinforced/Ground Treatment Developments 1987~1997,Geotechnical Special Publication No.69.Virginia:ASCE,1998.409~420
[6] Schmertmann J H. The mechanical aging of soils.Journal of Geotechnical Engineering ASCE,1991,117(9):1288~1330

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备注/Memo

备注/Memo:
作者简介:石名磊,男,1962年生,副教授.
更新日期/Last Update: 2001-05-20