为了完善DTS应用于灌注桩完整性检测的理论，基于有内热源的径向热传导理论和试验，针对桩径为300，400，600，1 000 mm的灌注桩，对沿桩中心轴线方向内置光纤热源的热传导特征进行研究;取最大过余温度1 K，对加热功率与温度场的相关性进行计算分析。确定了桩体内置光纤热源径向热传导特征、桩径、加热功率的定量关系，分析了DTS检测桩缺陷对光纤布线及加热功率的要求，最后给出了考虑DTS测试精度的合理光纤加热功率的确定方法。

Application of distributed optical fiber temperature sensing (DTS) technology to the detection of bored pile’s integrity is still in experimental stage, in lack of theoretical basis for fiber layout and mature evaluation system for pile quality. According to the theory of radial heat conduction with internal heat source, some key procedures of detecting bored pile’s defectives by DTS were researched. With bored piles of 300mm, 400mm, 600mm, and 1000mm diameter, the heat transfer characteristics with fiber heat source built-in along the central axis of pile were studied. Furthermore, the relationship between heating power and temperature field was analyzed with excessive temperature of 1K. On this basis, the requirements for fiber layout and heating power by DTS were analyzed.