Cast-in-place pile head static breaking hole-forming sleeve with crack propagation induction function

The utility model discloses a cast-in-place pile head static breaking pore-forming sleeve with a crack propagation induction function, belongs to the technical field of pile foundation engineering construction, and is designed for solving the problems of long time consumption and low efficiency caused by difficult generation of cracks in a cast-in-place pile static breaking process. The sleeve consists of a whole sleeve, an angular edge and a base cone, the whole casing pipe is a cylindrical pipe; the four corner edges are integrally bonded with the casing pipe and are arranged at intervals of 90 degrees; and the bottom cone is adhered to the bottom of the sleeve. The device is simple in structure and high in engineering practicability, and the formed hole is provided with a sharp corner and can induce generation and development of cracks. 本实用新型公开了一种具有裂纹扩展诱导功能的灌注桩桩头静态破除成孔套管，属于桩基工程施工技术领域，为解决灌注桩静态破除过程中不易产生裂缝而导致耗时长和效率低的问题而设计。本实用新型由套管整体、角棱和底锥组成；所述的套管整体是圆柱形管；所述的角棱与套管整体粘结，共4个，呈间隔90º布置；所述的底锥与套管底部粘连。本实用新型结构简单，工程实用性强，