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提出基于光纤测温技术的夹泥灌注桩完整性检测方法,详细介绍该方法的主要仪器设备及检测过程。在分析光纤与灌注桩传热过程的基础上,阐述基于光纤测温技术的夹泥灌注桩完整性检测方法的基本原理。开展完整桩模型试验,研究不同加热功率下桩体中光纤温升规律,发现桩体中光纤温升与加热功率之间具有良好的线性关系,比较桩内与空气中光纤温升差异。开展含泥量分别为33.3%,50%,66.7%与100%的夹泥缺陷桩模型试验,研究不同夹泥桩中光纤温升与加热功率的关系,发现含泥量与光纤温升之间存在确定性关系。通过以上研究,验证基于光纤测温技术的夹泥灌注桩完整性检测方法的可行性。
The method of inspecting the integrity of the mud-filled piles based on optical fiber temperature measurement technology is proposed, and the main equipment and testing procedures of the method are introduced in detail. On the basis of analyzing the heat transfer process of optical fiber and bored piles, the basic principle of the method for checking integrity of mud-filled bored piles based on optical fiber temperature measurement technology is expounded. A complete pile model test is carried out to study the law of temperature rise of the fiber in the pile under different heating powers. It is found that there is a good linear relationship between fiber temperature rise and heating power in the pile, and the difference between the temperature rise of the fiber in the pile and the air. Carrying out the model tests of pile defects with clay content of 33.3%, 50%, 66.7% and 100% respectively, the relationship between fiber temperature rise and heating power in different clip piles was studied. There is a definite relationship. Through the above research, the feasibility of testing the integrity of mud-filled piles based on optical fiber temperature measurement technology is verified.