新型装配式悬臂混凝土挡土墙承载性能试验

Experimental Investigation on Bearing Capacity of Novel Precast Cantilever Concrete Retaining Wall

摘要:

为了探究叠合型挡土墙的合理性和叠合面的有效连接方式，提出了3种新型装配式悬臂混凝土挡土墙（键槽叠合型、桁架筋叠合型和螺旋筋叠合型），并针对3种新型挡土墙和两组对照挡土墙进行了静力加载试验。结果表明，3种新型挡土墙较现浇挡土墙的承载性能劣化程度有限（15%以内），叠合型挡土墙是装配式挡土墙的有效形式，具有良好的适用性与可行性。其中桁架筋叠合型的叠合面连接可靠，抗裂性能好，整体性强，具有更佳的承载性能，故桁架筋是提高叠合面连接性能的有效方式。

Abstract:

To investigate the rationality and the effective connection mode of the superimposed surface of the superimposed type retaining wall, three types of new precast cantilever concrete retaining wall (the keyway superimposed type retaining wall, the truss bar superimposed type retaining wall and the spiral bar superimposed type retaining wall) were proposed. Static loading tests were carried out for three kinds of new precast retaining walls and two groups of control retaining walls. The results show that the deterioration degree of bearing capacity of the three new retaining walls is limited (within 15%) compared with the cast-in-place retaining wall. The superimposed type retaining wall is an effective mode of precast retaining wall, which has good applicability and feasibility. Among three kinds of the precast retaining wall, the truss bar superimposed type retaining wall has a reliable superimposed surface, strong crack resistance, good integrity, and better bearing capacity. Therefore, the truss bar is an effective way to improve the connection performance of the superimposed surface.