1前言橡胶抽拔棒是一种用于混凝土构件预应力管道成孔的型芯。现在，混凝土预应力管道成孔采用的方法主要有埋置橡胶型芯和金属波纹管两种。预埋型芯多采用编织胶管，加入纤维丝或钢丝的胶管变形小，但与混凝土粘着力大，抽拔需很大力，极易发生断管事故，并且受混凝土初凝时间 1 Introduction Rubber extraction rods are cores used to form holes for prestressed concrete pipes. At present, the methods used to form holes in concrete prestressed pipelines include embedding rubber cores and metal bellows. Pre-embedded cores are mostly made of braided rubber hoses. The hoses that incorporate fiber filaments or steel wires have small deformation, but they have a large adhesive force with concrete. They require a lot of force for pulling and drawing, and are prone to tube breaking accidents, and are subject to the initial setting time of concrete.