唐山地区滨海相软土地基处理技术研究

发布时间：2018-01-02 14:44

本文关键词：唐山地区滨海相软土地基处理技术研究　出处：《天津大学》2013年硕士论文　论文类型：学位论文

【摘要】：我国沿海地区广泛分布着滨海相软土地基。随着沿海城市的快速发展，滨海相软土地基对公路工程及沿海建设带来了巨大的挑战。滨海相软土地基工程性质不良，在天然状态下尚处于稳定，但在荷载或震动作用下，易发生不均匀沉降、触变或流变等不良变形，失去强度而产生软土沉陷，严重影响了道路的长期安全的使用。因此，选择合适的软土地基处理技术具有重要的理论与现实意义。本文以唐山市205国道（唐山段）改建工程的软土地基处理方法作为主要研究对象，采用理论分析和实际观测对软土地基的处理技术进行了系统的研究，具体工作主要有以下几个方面：（1）对现有软土地基处理技术进行了汇总分析，从加固机理、主要施工方法等方面进行了比较分析，并简要概括了各软土地基处理方法的优缺点及其适用条件。（2）以唐山地区滨海相软土地基为背景，，结合唐山市205国道（唐山段）改建工程实例，对其软土地基的处理技术进行了系统的研究。着重介绍了水泥搅拌桩、高压旋喷桩及振冲碎石桩三种软土地基处理方法的加固原理、施工技术及质量监控技术。（3）实际观测了水泥搅拌桩和高压旋喷桩复合地基的沉降变形特性，并运用双曲线法对复合地基的工后沉降规律进行拟合，推算出了软土地基最终沉降，为工程技术人员在工程建设中提供参考经验。
[Abstract]:China's coastal areas are widely distributed in coastal soft soil. With the rapid development of the coastal city, coastal soft soil has brought great challenges to the highway engineering and coastal construction. Littoral soft soil engineering properties, under the natural condition is stable, but the load or shock effect, easy the occurrence of uneven settlement, or other bad thixotropic rheological deformation, and lose strength of soft soil subsidence, serious impact on the road to the long-term safe use. Therefore, it has important theoretical and practical significance to choose suitable soft soil foundation treatment technology. This paper takes Tangshan City 205 National Highway (Tangshan section) reconstruction project of soft soil foundation processing method as the main research object, studied the processing technology of theoretical analysis and practical observation of the soft soil foundation, the specific work mainly in the following aspects: (1) on the soft ground The technology is summarized and analyzed, from the reinforcement mechanism, the main construction method and so on
The comparison and analysis are carried out, and the advantages and disadvantages of various soft soil foundation treatment methods and their suitability are briefly summarized.
Conditions. (2) the reconstruction of Tangshan City 205 National Road (Tang Shanduan) in the background of the soft land base in the coastal area of Tangshan
In the case of engineering, the treatment technology of soft soil foundation is systematically studied. The cement is emphatically introduced.
The strengthening principle of three soft soil foundation treatment methods of mixing pile, high pressure jet grouting pile and Vibroflotation Gravel Pile.
Technology and quality monitoring technology. (3) the settlement and deformation characteristics of cement mixing pile and high pressure rotary jet pile composite foundation are observed and used in two aspects.
The curve method is used to fit the law of post construction settlement of the composite foundation, and the final settlement of the soft soil foundation is calculated.
It will provide reference experience for engineers and technicians in the construction of engineering.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU472;TU447

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