干旱区生态环境知识资源中心(Arid): 强夯法消除风积粉细砂湿陷性研究

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	强夯法消除风积粉细砂湿陷性研究
其他题名	DYNAMIC COMPACTION STUDY OF ELIMINATING THE COLLAPSIBILITY OF EOLIAN DEPOSIT FINE SAND
	毛洪运 1; 朱江鸿 2; 喻小 3; 毕俊翔 1; 李忠民 1
来源期刊	工程地质学报
ISSN	1004-9665
出版年	2019
卷号	27 期号:4 页码:745-752
中文摘要	沙漠地区的风积粉细砂具有轻微至严重的湿陷性,消除该类地基土的湿陷性是工程学术界亟待解决的问题。结合工程实例,采用强夯法加固风积粉细砂地基土,通过浅层平板载荷试验及室内土工试验检测加固情况,评价强夯法消除风积粉细砂地基湿陷性的效果及规律。结果表明,风积粉细砂的湿陷性主要受含水率及密实度的影响,含水率对于湿陷变形作用尤其突出;强夯施工前,应对场地洒水充足,使土体含水率达到最优含水率;强夯加固中,填方区最佳锤击数为10击,挖方区最佳锤击数为8击,坚持动态化设计信息化施工;强夯后,风积粉细砂的承载力是强夯前的两倍,在湿陷试验中风积粉细砂变形增量随时间变化较少;强夯法改善风积粉细砂湿陷性效果显著,其中,洒水是控制湿陷性的主要因素,强夯是次要因素。研究结果有助于为强夯法处理风积粉细砂地基的设计、施工提供参考,为同类型地基处理提供借鉴。
英文摘要	The eolian deposit fine sand in desert area has slight to severe collapsibility. Eliminating the collapsibility for the foundation soil of eolian deposit fine sand is a problem to be solved urgently in engineering. Combined with the engineering example,the dynamic compaction method is used to reinforce the foundation soil of eolian deposit fine sand. The effect and law of the dynamic compaction method to eliminate the collapsibility of the eolian deposit fine sand are evaluated with shallow plate loading test and laboratory soil test. The results show that the collapsibility of the eolian deposit fine sand is mainly affected by the moisture content and the density. The water content is especially prominent for the collapsible deformation. Before the dynamic compaction,the water content of the soil should be sufficient to make the soil moisture content reach the optimal water content. In the dynamic consolidation and reinforcement,the optimum hammer number in the filled site is 10 strike,and the optimum hammer number in the excavated site is 8 strike. The dynamic design of information construction (ie.,the observational method) has to be used. After dynamic compaction,the bearing capacity of the eolian deposit fine sand is two times more than that before the dynamic compaction. In the collapsible test,the deformation increment of the eolian deposit fine sand is less with the time. The dynamic compaction method improves the collapsibility of the aeolian fine sand,among which the water is the main factor of controlling the collapsibility,and the dynamic compaction is the secondary factor. The research results help to provide reference for the design and construction of the foundation soil of eolian deposit fine sand by dynamic compaction,and provide reference for similar foundation treatment.
中文关键词	强夯法 ; 风积粉细砂 ; 湿陷性 ; 地基处理
英文关键词	Dynamic compaction Eolian deposit fine sand Collapse Found soil treatment
语种	中文
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:6558751
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316266
作者单位	1.中冶成都勘察研究总院有限公司, 成都, 四川 610023, 中国; 2.兰州大学土木工程与力学学院, 兰州, 甘肃 730000, 中国; 3.成都理工大学,环境与土木工程学院, 成都, 四川 610059, 中国
推荐引用方式 GB/T 7714	毛洪运,朱江鸿,喻小,等. 强夯法消除风积粉细砂湿陷性研究[J]. 兰州大学,2019,27(4):745-752.
APA	毛洪运,朱江鸿,喻小,毕俊翔,&李忠民.(2019).强夯法消除风积粉细砂湿陷性研究.工程地质学报,27(4),745-752.
MLA	毛洪运,et al."强夯法消除风积粉细砂湿陷性研究".工程地质学报 27.4(2019):745-752.