Field test and numerical analysis of a new expansion joint

Abstract in order to realize the reasonable design of new type pile slab subgrade, this study, relying on the reconstruction and expansion project of Lintou Longxi Interchange Section of g5011 Wuhe expressway, constructs a pile slab subgrade model with 15 holes and each hole is 6m. Through the full-scale model, the displacement of the new type of vertical limited expansion joint of pile slab subgrade under the most unfavorable load is obtained. Based on the separated modeling method, the nonlinear analysis of full-scale specimen under test loading condition with load displacement curve in good agreement with the measured results is realized. Combined with the static performance test of full-scale members, it is verified that the expansion joint of the pile slab subgrade has good vertical displacement limiting ability, which can be applied to the engineering.