碎石填土及台阶状场地强夯法加固效果分析

王勇; 盛志战; 刘青松; 胡高伟

doi:10.20265/j.cnki.issn.1007-2993.2024-0478

碎石填土及台阶状场地强夯法加固效果分析

doi: 10.20265/j.cnki.issn.1007-2993.2024-0478

王勇^{1, 2,},
盛志战²,
刘青松²,
胡高伟²

1.
北京工业大学，北京　100124
2.
北京市勘察设计研究院有限公司，北京　100038

详细信息

作者简介:
王　勇，男，1992年生，博士，主要从事岩土工程领域的设计及施工工作。E-mail：wangyong2011@foxmail.com

中图分类号: TU472.3
计量
- 文章访问数: 45
- HTML全文浏览量: 9
- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2024-10-21
- 修回日期: 2024-11-25
- 录用日期: 2025-01-02
- 刊出日期: 2025-10-10

Reinforcement effect of gravel filling in stepped site by dynamic consolidation

1.
Beijing University Of Technology, Beijing 100124, China
2.
BGI Engineering Consultants Ltd., Beijing 100038, China

摘要

摘要: 强夯法处理地基施工便捷、成本低廉，大规模应用在沿海软土区域。北京受“7·31”特大降雨影响，部分山区居民住宅水毁严重，新建住宅为二层洋房，承载力需求较低，工程场地为山前台阶状场地，选择强夯法进行地基处理，并对碎石填土区域强夯加固效果进行分析。依托门头沟区斋堂镇沿河口村水毁重建项目，利用数值计算软件对强夯加固处理效果进行模拟，结合现场实际工程施工及检测资料，针对填土深度、夯锤间距、夯锤尺寸、夯击次数等因素进行分析，得出碎石填土地层对应的强夯影响深度修正系数以及台阶状场地夯点布置最佳位置，数值模型计算结果与现场检测结果吻合。
- 强夯法 /
- 数值计算 /
- ABAQUS /
- 加固效果 /
- 台阶状场地
Abstract: The dynamic compaction method is widely used in coastal soft soil areas because of its convenient construction and low cost. In Beijing, affected by the heavy rainfall on July 31, 2023, some residential buildings in mountainous areas were seriously damaged by water. The newly built houses are two-story western-style houses with low bearing capacity demand. The project site is a terrace site at the front of the mountain. The dynamic compaction method was selected for foundation treatment, and the effect of dynamic compaction in the gravel-filled area was analyzed. Relying on the water-damaged reconstruction project of Yanhekou village, Zhaitang town, Mentougou District, the effect of dynamic compaction is simulated by using numerical calculation software. Combined with the actual engineering construction and testing data, the factors such as filling depth, rammer spacing, rammer size, and tamping times were analyzed, and the correction coefficient of dynamic compaction influence depth corresponding to the gravel filling stratum and the optimal location of tamping points in the stepped site were obtained. The numerical model calculation results are consistent with the field test results.
- dynamic consolidation method /
- numerical calculation /
- ABAQUS /
- reinforcement effect /
- stepped site

HTML全文

图 1 典型地质剖面图

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图 2 强夯现场施工图

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图 3 强夯地基静载荷试验曲线图

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图 4 模型网格划分

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图 5 强夯效果

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图 6 塑性区分布

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图 7 振动速度云图（2.338 s）

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图 8 振动速度云图（2.475 s）

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图 9 振动速度云图（2.75 s）

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图 10 夯锤间距7 m情况下塑性区分布图

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图 11 不同直径夯锤夯沉量

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图 12 单点多次夯击竖向位移曲线

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图 13 夯锤中心距离临空侧2.5 m位移云图

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图 14 夯锤中心距离临空侧3.5 m位移云图

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图 15 夯锤中心距离临空侧4.5 m位移云图

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表 1 土体及钢材计算参数表

土层名称	重度 /（g∙cm⁻³）	黏聚力 /kPa	内摩擦角 /(°)	压缩模量 /MPa
黏质粉土素填土①	18	10	10	3
碎石填土①₂	20	2	30	10
卵石②	22	2	40	38
钢材	78.5			2.06×10⁵

下载: 导出CSV

参考文献(11)

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