CN210636479U

CN210636479U - Building foundation pile body integrality detection device

Info

Publication number: CN210636479U
Application number: CN201921249712.1U
Authority: CN
Inventors: 周云; 洪世锋; 杨培峰; 许庆; 鲍云昆
Original assignee: Yunnan Cloud Inspection Engineering Technology Testing Co Ltd
Current assignee: Yunnan Cloud Inspection Engineering Technology Testing Co Ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-05-29
Anticipated expiration: 2029-08-05

Abstract

The utility model relates to a building engineering detects technical field, concretely relates to building foundation pile body integrality detection device. This detection device includes data acquisition analysis appearance, the exciting vibration hammer and sets up the first sensor at the foundation pile top, still include a plurality of acoustic survey pipes of vertical pre-buried in the foundation pile, acoustic survey pipe end opening portion is higher than the setting of foundation pile surface 5 ~ 10cm, its outside of acoustic survey pipe is equipped with the degree of depth pulley, its inside second sensor that is equipped with, the degree of depth pulley passes through the pull wire and is connected with the second sensor, first sensor, the second sensor is connected with the data acquisition analysis appearance electricity through signal line and quick-operation joint respectively. The utility model discloses to prior art's not enough, provide a building foundation pile body integrality detection device that simple structure is reasonable, solved current detection device problem that measuring result error is big in foundation pile body integrality detects, and can accurate judgement pile body integrality and defective position.

Description

Building foundation pile body integrality detection device

Technical Field

The utility model relates to a building engineering detects technical field, concretely relates to building foundation pile body integrality detection device.

Background

The foundation pile is one of main foundation types adopted by engineering buildings such as high-rise buildings, factory buildings, bridges, port wharfs and the like, belongs to the range of concealed engineering, and the quality of the foundation pile is directly related to safety and danger of the whole building. Because the foundation pile is buried underground hidden engineering, the quality of the foundation pile is not easy to control, and various quality problems influencing safe use are easy to occur, so the foundation pile detection is used as an important link for acceptance check of the hidden engineering after construction and before use, and plays an important role in ensuring the safety and stability of the whole engineering building. In the related art, the detection and acceptance of foundation piles in construction engineering generally have two aspects of pile body integrity and bearing capacity detection. As shown in the schematic diagram of fig. 1, in order to not damage the foundation pile structure in the low-strain pile integrity detection, the conventional pile integrity detection device only receives the reflected wave signal at the pile top, and because of the complexity of the quality problem of the foundation pile, the result that the foundation pile has a certain quality problem is obtained by using the reflected wave signal, and the measurement result has a large error, so that the pile integrity and the defect position cannot be accurately judged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a building foundation pile body integrality detection device that simple structure is reasonable, solved current detection device problem that measuring result error is big in foundation pile body integrality detects, and can accurate judgement pile body integrality and defective position.

The technical scheme of the utility model is realized like this: the utility model provides a building foundation pile shaft integrality detection device includes data acquisition analysis appearance, exciting vibration hammer and sets up the first sensor at the foundation pile top, its characterized in that still includes a plurality of acoustic survey pipes of vertical pre-buried in the foundation pile, acoustic survey pipe end opening portion is higher than 5 ~ 10cm settings on foundation pile surface, its outside of acoustic survey pipe is equipped with the degree of depth pulley, and its inside is equipped with the second sensor, the degree of depth pulley passes through the pull wire and is connected with the second sensor, first sensor, second sensor pass through signal line and quick-operation joint respectively and are connected with the data acquisition analysis appearance electricity.

The first sensor is a low-strain probe, and the second sensor is a one-transmitting-two-receiving probe.

The first sensor is vertically and firmly bonded with the pile surface of the foundation pile through plasticine serving as a coupling agent, and the installation position is located at the radius position 2/3 away from the center of the pile.

The sound measuring tube is a rigid plastic sleeve.

Thin-layer rubber pads are paved at the vibration excitation parts of the foundation piles so as to obtain better actual measurement signals.

The utility model provides an existing defect among the background art, have following beneficial effect:

the utility model provides a building foundation pile body integrality detection device simple structure is reasonable, has solved the big problem of current detection device measuring result error in foundation pile body integrality detects, and can accurate judgement pile body integrality and defective position. The utility model discloses at first through judging pile shaft quality with the back wave method, the foundation pile that awaits measuring is hammered with the exciting hammer promptly, and the vibration back wave signal of the first sensor of receiving on the observation data acquisition analysis appearance carries out preliminary judgement to pile shaft integrality. And then the quality of the pile body is judged by adopting a single-hole transmission method in the pile. The sound measuring pipe is filled with clear water medium, then the depth pulley is rotated, the second sensor slides up and down for a corresponding distance on the sound measuring pipe, the data acquisition analyzer acquires various acoustic parameters when ultrasonic waves are transmitted along the hole wall concrete, the defect position can be detected, the concrete strength of the pile body can be judged according to the change of the waveform, and the quality of the pile body concrete and the like can be judged. And finally, comparing and analyzing all results of the two testing methods to obtain a relatively accurate conclusion. Compared with the common launching method, the single-hole transmission method is adopted to judge the pile body quality, so that the measuring result is more accurate.

Drawings

Fig. 1 is a schematic view of a conventional pile body integrity testing device;

FIG. 2 is a schematic structural view of the present invention;

in the figure: 1-data acquisition analyzer, 2-vibration hammer, 3-first sensor, 4-foundation pile, 5-sounding pipe, 6-second sensor, 7-depth pulley, 8-traction line and 9-quick connector.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An embodiment of a building foundation pile body integrity detection device shown in fig. 2 comprises a data acquisition analyzer 1, an excitation hammer 2, a first sensor 3 arranged at the top of a foundation pile 4, and a plurality of acoustic pipes 5 vertically embedded in the foundation pile 4, wherein the port of each acoustic pipe 5 is 5-10 cm higher than the surface of the foundation pile 4, a depth pulley 7 is arranged outside each acoustic pipe 5, a second sensor 6 is arranged inside each acoustic pipe, the depth pulley 7 is connected with the second sensor 6 through a traction line 8, and the first sensor 3 and the second sensor 6 are respectively and electrically connected with the data acquisition analyzer 1 through signal lines and a quick connector 9. The first sensor 3 is a low strain probe and the second sensor 6 is a one-shot double-receiving probe. The first sensor 3 is vertically and firmly bonded with the pile surface of the foundation pile 4 by using plasticine as a coupling agent, and the installation position is located at a radius from the center 2/3 of the pile. The sound measuring tube 5 is a hard plastic sleeve. Thin rubber pads are paved on the vibration excitation parts of the foundation piles 4.

The utility model discloses a working process is: the first sensor 3 is vertically and firmly bonded with the pile surface of the foundation pile 4 through plasticine serving as a coupling agent, the installation position is located at the radius position from the center 2/3 of the pile, the depth pulley 7 is connected with the second sensor 6 in the sounding pipe 5 through a traction wire 8, and then the first sensor 3 and the second sensor 6 are respectively and electrically connected with the data acquisition analyzer 1 through a quick connector 9 and a signal wire. Opening data acquisition analyzer 1, at first judge pile shaft quality according to the back wave of different forms that receives at the pile bolck with the back wave method promptly, use the foundation pile 4 that awaits measuring of hammering of exciting hammer 2 promptly, observe the vibration back wave signal of first sensor 3 received on data acquisition analyzer 1, through looking over wave form and analysis amplitude-frequency signal characteristic, carry out preliminary judgement to pile shaft integrality. And then, judging the quality of the pile body by adopting a single-hole transmission method in the pile. The sounding pipe 5 is filled with clear water medium, then the depth pulley 7 is rotated, so that the second sensor 6 (a single-transmitting and double-receiving probe) slides up and down for a corresponding distance on the sounding pipe 5, ultrasonic waves enter the surface layer of the concrete of the hole wall from the transmitting end of the probe through coupling water and respectively reach two receiving ends through the coupling water after sliding for a certain distance along the surface layer of the concrete, and therefore the data acquisition analyzer 1 is enabled to acquire various acoustic parameters when the ultrasonic waves are transmitted along the concrete of the hole wall, the defect position can be detected, the concrete strength of the pile body can be judged according to the change of the waveform, the concrete quality of the pile body and the like can be judged. And finally, comparing and analyzing all results of the two testing methods to obtain a relatively accurate conclusion.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a building foundation pile shaft integrality detection device, includes data acquisition analysis appearance (1), excitation hammer (2) and sets up first sensor (3) at foundation pile (4) top, its characterized in that still includes a plurality of acoustic pipes (5) of vertical pre-buried in foundation pile (4), acoustic pipe (5) port portion is higher than foundation pile (4) surface 5 ~ 10cm setting, acoustic pipe (5) its outside is equipped with degree of depth pulley (7), and its inside second sensor (6) that is equipped with, degree of depth pulley (7) are connected with second sensor (6) through pull wire (8), first sensor (3), second sensor (6) are connected with data acquisition analysis appearance (1) electricity through signal line and quick-operation joint (9) respectively.

2. The building foundation pile shaft integrity detection device of claim 1, wherein: the first sensor (3) is a low-strain probe, and the second sensor (6) is a one-transmitter-two-receiver probe.

3. The building foundation pile shaft integrity detection device of claim 1 or 2, wherein: the first sensor (3) is vertically and firmly bonded with the pile surface of the foundation pile (4) by taking plasticine as a coupling agent, and the installation position is located at the radius position 2/3 away from the center of the pile.

4. The building foundation pile shaft integrity detection device of claim 3, wherein: the sound measuring tube (5) is a hard plastic sleeve.

5. The building foundation pile shaft integrity detection device of claim 4, wherein: thin rubber pads are paved on the vibration excitation parts of the foundation piles (4).