A device and method for accurately measuring the thickness of bored pile sediment

Abstract

The invention belongs to the technical field of geotechnical engineering, and discloses a device and method for accurately measuring the sediment thickness of bored piles. The device includes an upper disc and a lower disc connected by a plurality of suspension ropes. There is a probe, the probe needle is located at the through hole of the lower disc, and it also includes a displacement recording mechanism. The displacement recording mechanism keeps the tensioning rope in a tensioned state through the spring and then drives the cylinder and the gear to rotate, and passes through the laser receiver. The laser signal emitted by the laser transmitter is received from the gap between the adjacent teeth of the gear, and the laser signal is sent to the computer. The invention can accurately measure the sediment thickness at the bottom of the bored pile, so as to judge the quality of the hole and effectively improve the bearing capacity of the pile foundation.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a device and method for accurately measuring the sediment thickness of bored cast-in-place piles. Background technique [0002] Bored piles have the advantages of wide application range, high single pile bearing capacity, low construction noise, small vibration and low unit price, and have been widely used in various construction projects such as bridges, municipalities, and highways. Construction quality control is particularly important. During the construction process, due to the influence of the construction technology and the site environment, the rock and soil debris that was cut or impacted and broken, as well as the collapsed soil and mud were mixed together and settled at the bottom of the hole. When there is a thick sand layer, the hole There is also a layer of sediment at the bottom of the hole. The sediment at the bottom of the hole is cl...

AI Technical Summary

Problems solved by technology

Among them, the heavy hammer method is the most widely used, but its error is relatively large, and the sediment interface is judged only by the hand feeling of the tester; the coring method is an after-the-fact judgment, and the workload is large, which cannot solve the problem of excessive sediment before pile filling; Although the measurement accuracy of the emission method has been greatly improved, the cost is high, and the maintenance and repair of equipment are more troublesome

Images