承插式连接中桥墩采用预制墩，待桥墩插入承台预留孔洞后，在桥墩插入端外围灌入高强速凝灌浆料以密实预留孔洞，连接的结构可靠性主要取决于后期灌注的灌浆料和承插深度。文中对承插试件和现浇试件进行拟静力试验和ANSYS数值模拟，研究灌浆料的粘结性能、弹性模量和填充厚度对承插试件整体力学性能的影响。结果表明：在承插深度足够的情况下，灌浆料粘结良好时,承插试件具有和现浇试件基本一致的水平抗推刚度、极限承载力；灌浆料粘结失效后，桥墩和承台之间产生新的传力路径，仍然具有良好的水平抗推刚度和水平承载力，但承台底板的配筋需做强化以提高承台的受力性能；灌浆料的弹性模量和厚度基本不影响试件的极限承载力；试件的水平抗推刚度不受灌浆料的厚度影响，但随着灌浆料弹性模量的增加而增加。

In the socket connection, the bridge piers adopt prefabricated piers. After the bridge piers are inserted into the reserved holes of the cap, high-strength fast-setting grouting is poured into the periphery of the bridge pier insertion end to compact the reserved holes. The structural reliability of the socket connection mainly depends on the grouting and socket depth. Pseudo static tests and ANSYS numerical simulations were performed on the socket specimens and cast-in-place specimens. The effects of the grouts adhesive properties, the elastic modulus of the grout and the filling thickness on the overall mechanical properties were studied. The results show that,when the grout is bonded well, the socket specimen has the same level of thrust stiffness and ultimate bearing capacity as the cast-in-place specimen; after the cement grout fails, a new force transmission path occurs between the bridge pier and the cap. The socket specimen still has good thrust rigidity and horizontal bearing capacity, but the reinforcement of the socket test piece on the base plate of the socket needs to be strengthened accordingly to improve the bearing performance of the cap; the elastic modulus of the grout and the filling thickness have little effect on the ultimate bearing capacity of socket specimens,and the horizontal stiffness of the socket specimen is not influenced by the thickness of the grout, but it increases with the increases of the elastic modulus of the grout.