Ultrasonic pile bottom sediment thickness detection device and detection method

Abstract

The invention relates to an ultrasonic pile bottom sediment thickness detection device and detection method. The device comprises a cylindrical steel bar cage, an ultrasonic treatment device, measuring assemblies, measuring pipes, a support, an ultrasonic transmitting device and an ultrasonic receiving device; each measuring assembly comprises a measuring rope with scales, a measuring hammer and a pulley; the measuring pipes are parallel to the axis of the steel bar cage and can vertically move relative to the steel bar cage; one end of each measuring rope is connected with the corresponding measuring hammer, and the other end of the measuring rope winds around the corresponding pulley. The method comprises the following steps that 1, the steel bar cage is pressed into the hole bottom, and the tail ends of the measuring pipes are located below the designed elevation; 2, a pair of the measuring pipes are selected as measuring channels, and a pair of the measuring hammers are put into the measuring pipes respectively; 3, the measuring hammers are synchronously descended. According to the device or the method, by selecting the different measuring channels, not only can the pile bottom sediment thickness be precisely measured, but also the sediment shape can be known, and the pile body quality can be comprehensively known.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to an ultrasonic pile bottom sediment thickness detection device and detection method. Background technique [0002] Pile bottom sediment is an important factor affecting the bearing capacity of pile foundation. Too thick sediment will produce a "soft cushion" effect, thereby reducing the bearing capacity of the pile and increasing the settlement of the pile body. Studies have shown that when the thickness of sediment increases and the strength weakens, the maximum loss of pile tip resistance can reach more than 80%, and the thicker the sediment, the greater the loss of pile foundation bearing capacity. Bottom sediment thickness of bored piles is an important indicator of hole quality, and its control and measurement measures are one of the key measures to ensure the construction quality of bored piles and the bearing capacity of pile foundations. Therefore, the corresponding cu...

AI Technical Summary

Problems solved by technology

Existing sediment thickness detection mainly relies on the engineer's feel and experience to judge the sediment thickness, and the detection accuracy is difficult to guarantee

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