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胡  瑾¹，赵  阳^2，3

 

 

（1.中冶武勘工程技术有限公司，武汉 430080；2.中国科学院武汉岩土力学研究所

 

岩土力学与工程国家重点实验室，武汉 430071；3.新疆交通规划勘察设计研究院有限公司，乌鲁木齐 830006）

摘要：为揭示深厚软岩填土地基的强夯加固机理，基于深厚软岩填土不同能级强夯试验，建立夯锤-软岩填土地基三维模型，引入非线性理论，对低、中、高、超高等能级强夯进行数值模拟，研究了深厚软岩填土强夯加固处理的变形与振动特性。结果表明:各击次下加固土层的弹性模量与夯击次数呈幂函数分布规律；振动速度和振动加速度在距夯击点较近处衰减得快，在距夯击点较远处衰减得慢，3 000、6 000和12 000、15 000 kN·m 相比，后者强夯能级虽然增大很多，但强夯对振动影响未见明显增强很多；夯击能3 000～15 000 kN·m，有效加固深度在6.0～11.6 m。研究成果可为深厚软岩填土地基的强夯加固提供分析计算的理论依据和技术指导。

关键词：软岩填土；强夯；不同能级；数值模拟；振动特性

中图分类号：TU472

文献标志码：A

文章编号：1005-8249（2025）06-0041-07

DOI：10.19860/j.cnki.issn1005-8249.2025-06-008

 

 

 

HU Jin¹,ZHAO Yang^2,3

 

 

（1.WSGRI Engineering & Surveying Incorporation Limited,Wuhan 430080,China；

 

2.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China；3.Xinjiang Transportation Planning Survey and Design Institute Co.,Ltd.,Urumqi 830006,China）

 

Abstract：In order to reveal the mechanism of dynamic compaction reinforcement of deep soft rock fill foundation,based on the dynamic compaction test of different energy levels of deep soft rock fill,a three-dimensional model of hammer-soft rock fill foundation was established.The nonlinear theory was introduced to simulate the dynamic compaction of low,medium,high and ultra-high energy levels,and the deformation and vibration characteristics of deep soft rock fill were studied.The results show that the elastic modulus of the reinforced soil layer and the number of tamping times are in a power function distribution.The vibration velocity and vibration acceleration decay faster near the tamping point,and decay slower far away from the tamping point.Compared with 3 000,6 000 and 12 000,15 000 kN·m,although the dynamic energy level of the latter increases a lot,the influence of dynamic compaction on vibration is not significantly enhanced.The tamping energy ranges from 3 000 to 15 000 kN·m,and the effective reinforcement depth is distributed between 6.0 and 11.6 m.The research results can provide theoretical basis and technical guidance for the analysis and calculation of dynamic compaction engineering of deep soft rock fill foundation.

 

Key words：soft rock fill;dynamic compaction;different energy levels;numerical simulation;vibration characteristics

基金项目：国家自然科学基金资助项目（42077262）。

作者简介：胡  瑾（1987—），男，硕士，高级工程师，研究方向：地基处理、边坡工程。

收稿日期：2024-12-20