Method and device for utilizing electromagnetic wave CT technology to detect pile side and pile tip caves

Abstract

The invention discloses a method and a device for utilizing an electromagnetic wave CT technology to detect pile side and pile tip caves. The method comprises the steps of: after pile concrete of bored piles reaches an age, selecting a plurality of bored piles in a detected field for carrying out full-length core drilling, and obtaining a plurality of full-length core drilling holes; selecting two full-length core drilling holes to respectively serve as an emitting hole and a receiving hole, putting an emitting probe and a receiving probe of an electromagnetic wave instrument respectively into the emitting hole and the receiving hole; selecting a fixed-point and horizontal observation mode, and reading and recording electromagnetic wave signals through the electromagnetic wave instrument; and according to the detection result of the electromagnetic wave instrument, obtaining the positions, sizes, and forms of pile side caves and pile tip caves. The device comprises the electromagnetic wave instrument, the emitting hole, the emitting probe, the receiving hole and the receiving probe. The method and the device have the advantages that with the emitting probe and the receiving probe moving in the full-length core drilling holes, the distribution condition of the pile side caves and the pile tip caves in the whole filed is rapidly, effectively and economically known.

Description

technical field [0001] The invention relates to a detection technology for karst caves on pile sides and pile ends, in particular to a method and a device for detecting karst caves on pile sides and pile ends by electromagnetic wave CT technology. Background technique [0002] With the rapid development of urban economy, various large-scale engineering projects have emerged in large numbers. In order to solve the problem of foundation bearing capacity, bored cast-in-place rock-socketed piles are widely used. Buried karst and overburden karst are distributed in many cities in my country, and the situation is complex, which will have an important impact on the safety and bearing performance of building pile foundations. Therefore, it is very important to detect karst caves at the pile side and pile end in the karst distribution area. However, the traditional drilling and geophysical methods can only reflect the local distribution of karst caves, and cannot accurately identif...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for detecting pile side and pile end karst caves with electromagnetic wave CT technology in view of the unsatisfactory detection effect of pile side and pile end karst caves and the inability to fully reflect the distribution of karst caves in the construction site. device, quickly and effectively ascertain the distribution of pile side karst caves and pile tip karst caves in the entire site

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