Device for searching pile bottom of pile to be pulled and using method thereof

Abstract

The invention discloses a device for searching the pile bottom of a pile to be pulled and a using method thereof. The device at least comprises a steel casing pipe, the inner diameter of the steel casing pipe is larger than the outer diameter of the pile to be pulled, and the steel casing pipe is arranged outside the pile to be pulled; an ultrasonic sensor is arranged at the bottom end of the steel casing pipe and outwards outputs received signals to a control console in an ultrasonic reflection spectrum mode, and the position of the pile bottom of the pile to be pulled is determined according to the changes of information which is received by the control console in real time and sent by the ultrasonic sensor. According to the device and the using method thereof, the ultrasonic sensor is arranged at the bottom end of the steel casing pipe, whether the position where the ultrasonic sensor is located is the position the pile bottom or not can be known through comparison between the signals sent by the ultrasonic sensor and signals of the pile bottom of the pile to be pulled, therefore, a pile pulling sleeve can be locked at the pile bottom for one time, repeated sleeve trying and pulling are effectively avoided, the positioning precision and the automation degree are high, manpower and material resources are saved, and the purpose of shortening the construction cycle is achieved.

Description

technical field [0001] The invention relates to the technical field of urban construction, in particular to a device for searching the bottoms of piles to be pulled out in the process of rebuilding old cities and a method for using the same. Background technique [0002] In recent years, with the rapid development of urban development and construction, the pace of old city transformation is also accelerating. During the reconstruction and demolition of the old urban area, the removal of a large number of oblique old pile foundations is often involved, including the removal of various pile foundations such as bored piles, prefabricated piles, and wooden piles. [0003] However, the above-mentioned types of pile foundations are generally buried deep underground. After many years of use, the pile foundations at that time were affected by factors such as the geological conditions in the site, the construction parameters of the pile driving, and the effect of construction deviati...

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Problems solved by technology

[0003] However, the above-mentioned types of pile foundations are generally buried deep underground. After many years of use, the pile foundations at that time were affected by factors such as the geological conditions in the site, the construction parameters of the pile driving, and the effect of construction deviation control. The actual pile bottom position will be quite different from before

In actual operation, in order to accurately set the pile pulling noose to the bottom of the pile, repeated attempts are required in the pile pulling operation, the exploration accuracy is low, the construction period is long, time-consuming and laborious, and the positioning of the pile bottom to be pulled has become a constraint on the efficiency of pile bottom removal. a major factor

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