新型大直径预应力混凝土实心方桩研究

发布时间：2018-08-31 08:06

【摘要】：现有市场上虽然已经存在多种预制桩,像预制钢筋混凝土方桩(以下简称预制方桩)、预应力混凝土管桩(以下简称预应力管桩)和预应力混凝土离心空心方桩(以下简称预应力空心方桩)等,这几种比较常用的预制桩生产技术已经非常成熟,应用非常广泛。然而,这几种桩有其自身的缺点,预制方桩桩身强度低,预应力管桩和预应力空心方桩生产过程中会消耗大量的能量,这与国家提倡节能环保的主题是背道而驰的。因此,研制一种力学性能较其它桩型好且耗能少的新桩型对于当代人是一种不小的挑战。本文是由作者导师组织的团队与青岛昊河水泥制品有限公司合作共同研制一种新型预应力混凝土实心方桩(以下简称预应力实心方桩)。主要内容如下:设计一种新型预应力实心方桩,研究预应力实心方桩的生产工艺流程,解决生产过程中遇到的关键技术问题,绘制图集;设计现场实验并进行现场测试,进行数据采集并对数据进行处理,得出工程参数;建立有限元模型,进行有限元力学分析,得出工程参数;与预应力管桩、预应力空心方桩之间进行对比,得出预应力实心方桩在经济性方面的优越性。
[Abstract]:Although a variety of prefabricated piles already exist in the existing market, Such as precast reinforced concrete square pile (hereinafter referred to as prefabricated square pile), prestressed concrete pipe pile (hereinafter referred to as prestressed pipe pile) and prestressed concrete centrifugal hollow square pile (hereinafter referred to as prestressed hollow square pile), etc. These prefabricated pile production techniques are very mature and widely used. However, these kinds of piles have their own shortcomings. The prefabricated square piles have low strength and large amounts of energy will be consumed in the production of prestressed pipe piles and prestressed hollow square piles, which runs counter to the national theme of promoting energy conservation and environmental protection. Therefore, it is a great challenge for contemporary people to develop a new type of pile with better mechanical properties and less energy consumption than other pile types. In this paper, a new type of prestressed concrete solid square pile (hereinafter referred to as prestressed solid square pile) is developed by the team organized by the author and Qingdao Haohe cement products Co., Ltd. The main contents are as follows: design a new type of prestressed solid square pile, study the production process of the prestressed solid square pile, solve the key technical problems encountered in the production process, draw the atlas, design the field experiment and carry on the field test, Data acquisition and data processing to obtain engineering parameters; establish finite element model, finite element mechanics analysis, get engineering parameters; compare with prestressed pipe pile, prestressed hollow square pile, The superiority of prestressing solid square pile in economy is obtained.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU473.13

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