【摘要】 预应力混凝土围护桩用于基坑围护有其独特的优越性,但是此桩作为临时性的大变形构件,本身的受力性能与普通的受弯、受剪构件有所区别,本文将对此桩适用的理论模型、挠度和裂缝的约束、异号时变弯矩对抗剪性能的影响等问题进行探索研究。更多还原

【Abstract】 There are special advantages for the application of new I-shaped prestressed concrete pile in pit maintenance.However,the pile,as a temporary and large deform constructional element,has a distinguish stress performance in flexural property and shear property with common beam.We will research and explore the problems,such as the suitable theoretical model for pile,the restraint of deflection and crack and the influence to shear property due to opposite time varying bending moment and so on.更多还原