摘  要：为提高电力电缆排管防护沟槽的装配化程度和便于局部更换，研发了预制装配式排管防护沟槽结构体系，开展了沟槽结构的参数化设计。选取典型结构构造形式，采用原型试验研究和有限元分析相结合的方法，分析了覆土厚度分别在1 m和3 m两种工况下，结构应力分布和位移变化规律。研究结果表明，覆土厚度对结构竖向位移、普通钢筋拉应力影响显著，覆土厚度为3 m时的结构竖向位移、普通钢筋拉应力值分别是覆土厚度为1 m时对应值的2.4倍和2.3倍。槽壁是结构主压应力的控制构件，底板是纵向拉应力和主拉应力的控制构件。底板主拉应力随覆土厚度增大而明显增加，当覆土厚度为3 m时，主拉应力极值为2.61 MPa，略小于C50抗拉强度标准值2.64 MPa。
Abstract：In order to increase the extent of precast assembly of protective groove used for power cable in pipes and be convenient to local replacement, structural system of precast assembly protective groove used for power cable in pipes had been formed, and the parametric design had been carried out. Taking certain typical structural forms of the protective groove as the target of study, prototype experiment and finite element method were used, and two conditions were analyzed with different soil thickness which was respectively 1 m and 3 m, and the distribution of stress and displacement change were obtained. The results indicate that soil thickness has significant effects on the structural vertical displacement and the tensile stress of ordinary steel bars, and the structural vertical displacement and tensile stress when soil thickness is 3 m are 2.4, 2.3 times that of soil thickness is 1 m, respectively. Groove wall is the control component which has the biggest principal compressive stress, and the base plate is the control component which has the biggest longitudinal tensile stress and principal tensile stress. The max principal tensile stress of the base plate is increased with the increase of the soil thickness, when the soil thickness is 3 m, the max principal tensile stress is 2.61 MPa, which is smaller than 2.64 MPa of the tensile strength standard value as for C50 concrete.