强夯法在山地高填方地基处理中的应用研究

发布时间：2018-01-03 20:18

本文关键词：强夯法在山地高填方地基处理中的应用研究　出处：《福州大学》2013年硕士论文　论文类型：学位论文

【摘要】：强夯法由法国梅纳(Menard)技术公司于1969年首创,它是利用起重机将重锤提升到一定的高度,使其自由落下给地基土强大的冲击和振动,以达到提高地基强度和降低其压缩性的目的。强夯法是一种适用范围广、经济有效的地基处理方法,越来越广泛应用于工程建设中,特别是随着中国城镇化建设进程的加快、城市建设用地需求的大幅增长,建设项目大量向城市周边山区扩张,越来越多的山地工程建设将采用此种方法进行地基处理,因此,对强夯法处理山地高填土地基的处理理论和应用进行进一步研究是具有非常显著的理论意义和实践价值。首先,本文对广泛应用的地基处理方法及其适用条件和优缺点进行了综合论述,并着重说明采用强夯法进行高填方地基处理的原因。强夯法具有适用范围广、加固效果显著、机械设备简单、施工工艺简便、节约施工材料、造价较低等优点,特别是在处理以块石、碎石为主的山地高填方地基有很大的优势。其次本文阐述了强夯加固处理高填方地基的施工工艺特点和工艺流程以及重点分析强夯法加固机理。以福州马尾沁园春(水岸君山)项目为例,进行强夯参数设计与确定,对于单击夯击能、夯击遍数、间歇时间、夯点布置和间距等关键强夯法施工技术参数设计时,不能仅单凭理论公式确定,应根据有关单位的设计、施工经验、机械设备条件以及现场的实际情况综合确定。最后本文以福州马尾沁园春(水岸君山)项目为实例,采用瑞雷波面检测强夯法有效加固深度。绘制了面波波速等值线图、面波频散曲线图,分析产生原因并找出规律。平板载荷试验应用于该项目地基承载力的检测。检测结果表明该项目强夯法地基处理达到了预期的效果,可为类似工程的地基处理提供借鉴。
[Abstract]:The dynamic compaction method was founded by the French Mena Menard Technology Company in 1969. It uses the crane to raise the weight hammer to a certain height so that it can fall freely to the strong impact and vibration of the foundation soil. In order to improve the strength of the foundation and reduce its compressibility, the dynamic compaction method is a widely used, economical and effective foundation treatment method, which is more and more widely used in engineering construction. In particular, with the acceleration of urbanization in China, the demand for urban construction land has increased significantly, and construction projects have expanded to the mountainous areas around the city. More and more mountain engineering construction will use this method for foundation treatment, therefore. It is of great theoretical significance and practical value to further study the treatment theory and application of dynamic compaction method for the treatment of high fill soil foundation in mountainous area. In this paper, the widely used foundation treatment methods, their applicable conditions, advantages and disadvantages are comprehensively discussed, and the reasons of using dynamic compaction method for high fill foundation treatment are emphatically explained. The dynamic compaction method has a wide range of application. The reinforcement effect is remarkable, the mechanical equipment is simple, the construction technology is simple, the construction material is saved and the cost is low, especially in the treatment of block stone. The paper expounds the construction technology characteristic and technological process of treating high fill foundation with dynamic compaction and emphatically analyzes the reinforcement mechanism of dynamic compaction method in Fuzhou Mawei Qinyuan. Spring. Shuianjun Mountain) Project for example. Design and determine the parameters of dynamic compaction, for the click ramming energy, tamping times, interval time, tamping point layout and spacing and other key construction technical parameters design, can not be determined solely by theoretical formula. It should be determined synthetically according to the design, construction experience, mechanical and equipment conditions and the actual situation of the site. Finally, this paper takes the spring of Mawei Qinyuan (Junshan Waterbank) project in Fuzhou as an example. Rayleigh wave surface is used to detect the effective reinforcement depth. The surface wave velocity isoline diagram and surface wave dispersion curve are drawn. Analysis of the causes and find out the law. The plate load test is applied to the test of the foundation bearing capacity of the project. The test results show that the project dynamic compaction method foundation treatment achieved the desired results. It can be used for reference for foundation treatment of similar engineering.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU472.31

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