螺杆桩施工机具的设计分析

发布时间：2019-06-29 07:58

【摘要】：螺杆挤土桩有很多优点，提高了桩身的摩擦能力，最大限度地减少了弃土，与传统的钻孔灌注桩技术相比在达到相同的承载的能力下可以减少混凝土的使用。本文为后续螺杆桩施工机具的设计发展做了研究。文章的基本目的是开发一个螺杆桩施工系统，以提高桩的自身承载能力，降低材料消耗，，减少弃土，使生产成本和对环境的影响降到最少。通过对螺杆钻具施工过程中需要克服的扭矩和垂直阻力的分析，推导出螺杆钻具钻进需要的扭矩和加压力的计算公式，为螺杆桩机的动力头和卷扬加压系统的设计提供理论依据。并再考虑螺杆桩承载力的前提下对螺杆钻具的参数设计进行了讨论，为螺杆钻具的设计提供参考。螺杆桩机的关键技术研究，对螺杆桩机的总体和各个部件进行了介绍并对相应部件进行了设计。螺杆桩存在着明显的优势，但在钻进过程中和施工工艺上也提出了更高的要求，本文并对施工特点和施工注意要点进行了详细的论述，为以后螺杆桩机的现场施工提供了理论性的指导。通过有限元分析结果，对螺杆钻具的破坏强度、稳定性和钻具本身的固有频率有了很直观的了解，推断钻杆可能在材料屈服和屈曲的共同作用下发生破坏，为螺杆桩施工机具的设计改进提供了理论依据。
[Abstract]:Screw compaction pile has many advantages, which improves the friction capacity of pile body and minimizes the abandonment of soil. Compared with the traditional bored pile technology, it can reduce the use of concrete under the same bearing capacity. In this paper, the design and development of screw pile construction tools are studied. The basic purpose of this paper is to develop a screw pile construction system to improve the bearing capacity of the pile, reduce the material consumption, reduce the abandoned soil, and minimize the production cost and impact on the environment. Based on the analysis of the torque and vertical resistance to be overcome in the construction process of screw drilling tools, the formulas for calculating the torque and pressure required for screw drilling tools are derived, which provides a theoretical basis for the design of power head and lifting pressure system of screw pile machines. On the premise of considering the bearing capacity of screw pile, the parameter design of screw drilling tool is discussed, which provides a reference for the design of screw drilling tool. The key technology of screw pile driver is studied, the whole and each component of screw pile driver are introduced, and the corresponding components are designed. Screw pile has obvious advantages, but it also puts forward higher requirements in drilling process and construction technology. in this paper, the construction characteristics and construction attention points are discussed in detail, which provides theoretical guidance for the field construction of screw pile machine in the future. Through the results of finite element analysis, the failure strength, stability and natural frequency of the screw drilling tool are intuitively understood, and it is inferred that the drill pipe may be destroyed under the combined action of material yield and flexion, which provides a theoretical basis for the design improvement of the screw pile construction machine.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU67

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