深厚砂性土地基竖向高频振动致密机理及地基加固设计

陈福全; 曹琪君

doi:10.13204/j.gyjz201206025

深厚砂性土地基竖向高频振动致密机理及地基加固设计

doi: 10.13204/j.gyjz201206025

1.
福州大学土木工程学院福州 350108

基金项目:

国家自然科学基金项目(40972200)

详细信息

作者简介:
陈福全，男，1971年出生，博士，教授

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- 文章访问数: 120
- HTML全文浏览量: 10
- PDF下载量: 119
- 被引次数: 0
出版历程
- 收稿日期: 2011-12-01
- 刊出日期: 2012-06-20

MECHANISM AND DESIGN METHOD OF GROUND IMPROVEMENT BY RESONANCE COMPACTION METHOD

1.
School of Civil Engineering,Fuzhou Universtiy,Fuzhou 350108,China

摘要

摘要: 高频振动致密是一种地基处理的新技术。该法应用高频振动锤在振动探杆顶施加竖向激振力,在振动杆轴周围产生剪切波(S波)及压缩波(P波),在高频振动力的作用下,土体中的振动探杆由此上下反复振动,在S波和P波的作用下,最终逐步地提高其周围土体密实度。在详细介绍该法的加固机理、施工原理以及与振冲法区别的基础上,提出适用于该法处理的土质条件并采用颗粒离散元分析结果进行分析说明以及相应的设计和检测方法。最后指出了该技术有待于进一步研究的几个理论问题。
- 高频振动锤 /
- 砂性土 /
- 地基处理 /
- 设计方法
Abstract: The resonance compaction method (MRC ) , using high frequency hydraulic vibratory hammer and MRCcompaction probe, is one of the most efficient way of vibratory compaction method for deep granular soils. The probeis oscillated in the vertical direction and the vibration energy is transmitted to the surrounding soil along the entireprobe surface. Then soils compaction is caused by vertically polarized shear waves. In the paper, mechanism of highfrequency deep vibratory compaction method for deep granular soil densification was studied. Mitchell' s method,which classified soils with respect to the grain size distribution, and Massarsch' s method based on the conepenetration test, were modified to preferably assess the compactability of deep granular soil. The design method ofconstruction scheme was put forward for MRC.
- vibratory hammer /
- granular soils /
- ground improvement /
- design method

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参考文献(8)

Massarsch K R.Effects of Vibratory Compaction[C]//Proceedings of Vibratory Pile Driving and Deep Soil Compaction.Lisse:SwetsZeitlinger,2002:33-42.

[2] Massarsch K R.Deep Soil Compaction Using Vibratory Probes[C]//Proceedings of Deep Foundation Improvements:Design,Construction,and Testing.Philadelphia.1991:297-319.

[3] Bodare A,Orrje O.Impulse Load on a Circular Surface in anInfinite Elastic Body-Closed Solution According to the Theory ofElasticity[D].Stockholm:Royal Institute of Technology(KTH),1985:99-113.

[4] Mitchell J K.Soil Improvement-State-of-the-Art[C]//Proceedings of 10th International Conference on Soil Mechanicsand Foundation Engineering.Stockholm:1982:509-565.

[5] 曹琪君.饱和砂性土地基深层竖向高频振动致密机理的颗粒离散元模拟[D].福州:福州大学,2011.

[6] 《地基处理手册》编写委员会.地基处理手册[M].3版.北京:中国建筑工业出版社,2008.

[7] Holeyman A E.Soil Behavior Under Vibratory Driving[C]//Proceedings of Vibratory Pile Driving and Deep Soil Compaction.Lisse:SwetsZeitlinger,2002:3-19.

[8] Green P A,Padfield C J.A Field Study of Ground ImprovementUsing Vibroflotation[C]//Proceedings of the 8th EuropeanConference on Soil and Foundation Engineering.Helsinki.1983:241-248.

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