Collapse prevention device for reserved hole of pile foundation grouting pile

A collapse prevention device for a pile foundation grouting pile remaining hole opening comprises a cover net (1) arranged on the pile foundation grouting pile remaining hole opening and a cylinder net (5) arranged on the cover net (1), the pile foundation grouting pile remaining hole opening is covered through the cover net (1), and the pile foundation grouting pile remaining hole opening is subjected to lining supporting treatment through the cylinder net (5). The hole wall supporting body is arranged in the pile foundation grouting pile remaining hole, and the technical problem that a cover plate is usually used for covering and protecting the pile foundation grouting pile remaining hole is solved, so that the hole collapse risk of the pile foundation grouting pile remaining hole is eliminated, and the stability performance of a construction foundation is improved. 一种用于桩基灌桩留置孔口的防坍塌装置，包含有设置在桩基灌桩留置孔口上的盖网(1)、设置在盖网(1)上的筒网(5)，通过盖网(1)，实现了对桩基灌桩留置孔口进行覆盖处理，通过筒网(5)，实现了对桩基灌桩留置孔进行内衬支撑处理，实现了在桩基灌桩留置孔中置留孔壁支护体，解决了对通常使用盖板对