摘要：随着科学技术的发展与进步，桩基础在各大工程领域有着广泛的应用，尤其是在海洋工程领域中。针对拔桩过程以及桩基稳性的研究，设计了海基土实验装置桩基试验系统。该实验装置结构简单、工作稳定、质量轻、制造方便，不仅可以开展常见的桩基稳性试验研究，还可以模拟海洋平台桩靴这一结构所受到的多元载荷，研究桩靴与土层间的相互作用。该试验系统利用稳定性高的液压油缸驱动，通过传感器技术，从而来检测桩靴受力情况与位移的变化。在实验平台设计过程中，尽可能使用市场上已经成熟的机械部件，在提高实验装置质量的同时，可以减少研发周期，便于后续的加工制造。对于必要零部件，在结构设计时通过分析优化的方法，尽可能在满足设备功能的基础上减少不必要的材料消耗，进而实现结构最优化，质量最高化，重量最轻化。

关键字：试验系统；桩靴；多元载荷；稳定性

ABSTRACT：With the development and improvement of science and technology, pile foundation has been widely applied in many engineering fields, especially in the area of ocean engineering. In order to research the process of pile pulling and the stability of pile foundation, a system of pile foundation test by experimental equipment for sea -based soils was designed. The advantage of this facility includes simple structure, stable working, light quality, convenient manufacturing. The system can be used to conduct the research on normal stability test of pile foundation, simulate the multiply load on the pile shoe of ocean platform and research the interaction between pile shoe and the soil. This test system which was driven by highly stable hydraulic cylinders can check the condition of pile shoe’s force and the changes of its displacement by using sensor technology. During the progress of designing the experimental platform, I choose machine parts which are mature in the market as much as possible, which can reduce the cycle of designing and provide convenience for subsequent manufacturing on the promise of improving the quality of experimental device. As for some necessary parts, the material consumption of unnecessary part should be reduced on the basis of satisfying the functions of the equipment when designing its structure by analyzing and optimizing, and then this will optimize the structure, improve the quality and minimize the weight as much as possible.

Keywords: Test system; Pile shoes; multiple load; stability

目录

第一章 绪论 1

1.1研究背景 1

1.2国内外现状 2

1.3存在问题 3

1.4本章小结 3

第二章 海基土实验装置总体方案设计 4

2.1海基土实验装置功能介绍 4

2.2海基土实验装置设计要求 5

2.3海基土实验装置方案设计 6

2.3.1设计原则 6

2.3.2工作流程 6

2.3.3桩靴模型 6

2.4本章小结 7

第三章 主要零部件设计与计算 8

3.1钢架材料的选择 8

3.2上钢架的设计 8

3.2.1桁架简介 8

3.2.2矩形方管结构特点 10

3.2.3上钢架结构设计