A Root Pile Construction Quality Monitoring Device Based on Ultrasonic Ranging System

Abstract

The invention relates to a root type pile construction quality monitoring device based on an ultrasonic ranging system. The device comprises a speed measuring system, a distance measuring system, a single-chip microcomputer and an ultrasonic detection tube. The speed measuring system and the distance measuring system are arranged outside the ultrasonic detection tube. The single-chip microcomputeris arranged in the ultrasonic detection tube. The speed measuring system comprises a speed measuring emitter and a speed measuring receiver. The speed measuring emitter and the speed measuring receiver are arranged in the axial direction of the ultrasonic detection tube. The distance measuring system comprises a distance measuring emitter, a distance measuring receiver and a reflecting piece. Thedistance measuring emitter and the distance measuring receiver are uniformly distributed along the circumference of the ultrasonic detection tube. The reflecting piece is pre-buried in the root portion of a root key. The speed measuring emitter, the speed measuring receiver, the distance measuring emitter and the distance measuring receiver are connected with the single-chip microcomputer throughwires. Compared with the prior art, the device can effectively eliminate the influence of the sound velocity in the slurry and the influence of the perpendicularity of the root key, so that the soilpenetration depth of the root key is accurately measured. The assembling condition of the root key is known. Meanwhile, the device is convenient to operate, simple in structure and low in cost.

Description

technical field [0001] The invention relates to a detection device for root pile construction, in particular to a root pile construction quality monitoring device based on an ultrasonic ranging system. Background technique [0002] At present, during root key jacking construction of root piles (root bored piles), there are mainly problems in the quality of root key construction in the following aspects: first, after the rotary excavator has formed a hole, it is necessary to carry out mud protection. At this time, the hole wall is A layer of mud skin is formed, but when the root key is pushed into the soil and the mud skin is pierced, the soil around the pile changes its density due to disturbance, so there is a possibility that the root key will loosen and fall to the bottom of the pile; secondly, The unevenness of the soil around the pile can lead to uneven force on the device during jacking, which makes the center of the jacking device and the center of the hole eccentric,...

AI Technical Summary

Problems solved by technology

[0002] At present, during root key jacking construction of root piles (root bored piles), there are mainly problems in the quality of root key construction in the following aspects: first, after the rotary excavator has formed a hole, it is necessary to carry out mud protection. At this time, the hole wall is A layer of mud skin is formed, but when the root key is pushed into the soil and the mud skin is pierced, the soil around the pile changes its density due to disturbance, so there is a possibility that the root key will loosen and fall to the bottom of the pile; secondly, The unevenness of the soil around the pile can lead to uneven force on the device during jacking, making the center of the jacking device and the center of the hole eccentric, resulting in uncontrollable jacking depth of the root key

The above two problems will lead to a decrease in the quality of the root key, and it is impossible to detect whether the root key has fallen off, or whether the depth of the root key into the soil has reached the standard, and it is impossible to carry out later repairs

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