强夯地面沉降特征及地基双层构造的形成(强夯加固机理探讨之五)

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英文篇名：The Features of Surface Settlement of Dynanmic Compacted Subgrade and the Formation of Double-layer Structure 中文刊名：土工基础 英文刊名：Soie Engineering and Foundation 作者：郭见扬 英文作者：Guo Jianyang(I. R. S. M. Academic Sinica ; Wunan ; 430071) 中文关键词：地面强夯沉降 ; 地基双层构造 英文关键词：Dynamic consolidation settlement Double-layer subgrade Compaction energy 出版日期：1997-09-30 机构：武汉岩土力学研究所!430071 年：1997 期：03 出版单位：土工基础

摘要

讨论了夯坑地面沉降特征，夯击时贯入度大以及在第Ⅱ阶段贯入度衰减缓慢、地面无明显隆起等是夯能充分发挥的反映，强夯地基有双层构造，上层（A层）为强烈夯实层，下层（B层）为弱夯实层，后者受到低周期低幅值动应力作用而收到抗振动稳定性提高的强夯加固效果。
In this paper, the features of surface settlement of dgnamic compacted subgrade is discussed. The penetration of hammr is large at the beginning and then decreases gradually in the second stage of compaction- No obvious heaving of soil sndace indicates the compacting energy is fully mobilized. Double-layer formation is formed by dynndc compaction. The upper layer (A layer) has been violently compected while the lower one (B layer) which is subjected to dynndc action of low frequency and low amplitude, is only slightly compacted so that its anti -vibration stability is increed.

引文

[1]中国建设部.建筑地基基础设计规范.GA17—89,1989.北京
    [2]郭见扬.夯能的传播和夯实柱体的形成.土工基础.1996(10)4
    [3]郭见扬.夯能沿土层深度的分配问题.土工基础.1996(10)3
    [4]郭见扬.强夯夯锤的冲击力问题.土工基础. 1996(10)2
    [5]郭见扬.论强夯地基的双层构造问题.岩土力学.1991 (1)4
    [6]刘颖等.砂土震动液化.地震出版社. 1984年