湖南大学学报（自然科学版）2025，Vol.52Issue(5)：141-153,13.DOI:10.16339/j.cnki.hdxbzkb.2025055
考虑变形及应力响应的填石路堤强夯有效加固深度研究
Research on Effective Reinforcement Depth of Dynamic Compaction of Stone-filled Embankment Considering Deformation and Stress Response
摘要
Abstract
Taking the dynamic compaction reinforcement project of the super large particle size high stoned-filled embankment of Pan-Xing highway of Guizhou province as an example,the effective reinforcement depth of high stoned-filled embankment was comprehensively studied based on the variation law of embankment compacted fill density with depth after dynamic compaction and the attenuation characteristics of tamping energy propagation of dynamic compaction.Meanwhile,a calculation formula for effective reinforcement depth of dynamic compaction was derived based on the volumetric strain equation considering the crater depth and compacted fill density control requirements.A field compaction test was carried out to obtain the functional relationship between the compacted fill density and static soil pressure increment under the compaction energy.Additionally,a field dynamic compaction test was carried out to analyze the variation laws of embankment surface displacement and the change of dynamic and static stress inside the embankment with the tamping times.The results indicate a strong correlation between the compacted fill density and static soil pressure increment under the compaction energy.The crater depth reached 932 mm,and the maximum embankment surface uplift near the crater reached 50 mm after eight tamping times.The peak value of dynamic stress and the static soil pressure increment in the depths of the embankment decreases rapidly with the depth,and the embankment surface uplift near the crater decreases more sharply with the increase of distance from the edge of the crater.The vertical effective reinforcement depth and horizontal effective reinforcement radius of dynamic compaction are about 5.0 m and 2.5 m,respectively.The modified coefficient of the established calculation formula for effective reinforcement depth of dynamic compaction was fitted based on the measured data of effective reinforcement depth under different tamping times.Furthermore,the effective reinforcement depth optimization formula considering the horizontal and vertical action effects of dynamic compaction and the reinforcement quality control requirements was established.关键词
道路工程/填石高路堤/有效加固深度/压实密度/静土压力增量/强夯施工参数Key words
road engineering/high stone-filled embankment/effective reinforcement depth/compacted fill density/static soil pressure increment/construction parameters of dynamic compaction分类
建筑与水利引用本文复制引用
徐平,侯伟琦,乔世范,董辉,罗正东..考虑变形及应力响应的填石路堤强夯有效加固深度研究[J].湖南大学学报（自然科学版）,2025,52(5):141-153,13.基金项目
国家自然科学基金资助项目(42272304),National Natural Science Foundation of China(42272304) （42272304）
湖南省教育厅资助项目(22C0046),The Science Foundation of Education Department of Hunan Province(22C0046) （22C0046）
湘潭大学博士科研启动项目(21QDZ27),The Research-Driven Project of Xiangtan University(21QDZ27). （21QDZ27）
