CN209162913U - A kind of existing building quality inspection of the piles device - Google Patents
A kind of existing building quality inspection of the piles device Download PDFInfo
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- CN209162913U CN209162913U CN201821694243.XU CN201821694243U CN209162913U CN 209162913 U CN209162913 U CN 209162913U CN 201821694243 U CN201821694243 U CN 201821694243U CN 209162913 U CN209162913 U CN 209162913U
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- foundation pile
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Abstract
The utility model discloses a kind of existing building quality inspection of the piles devices, including hydrophone, acceleration transducer, pulsed discharge focus equipment and data analysis system；The pulsed discharge focus equipment is equipped with pulse discharge electrode, exciting hole and acquisition hole are offered on the cushion cap at the top of foundation pile, the bottom hole in the exciting hole and the acquisition hole is the top of foundation pile, exciting fills clear water in hole, the pulse discharge electrode and the hydrophone are both placed in the exciting hole, the acceleration transducer is placed on the bottom hole in the acquisition hole, and the hydrophone and the acceleration transducer are connect with the data analysis system respectively.Using the utility model, it is capable of the quality of accurate judgement foundation pile, while has the advantages that efficient, inexpensive.
Description
Technical field
The utility model relates to building foundation field of non destructive testing more particularly to a kind of existing building pile quality to examine
Survey device.
Background technique
Carrying basis of the existing building foundation pile as building, the excellent of quality will directly decide top-out knot
The safety of structure and durability；For it is some live through the major natural disasters such as earthquake, typhoon, landslide influence houses or by
For the bridge of vehicle, ship and flood impact, the quality inspection of the piles of house and bridge will become extremely important；In addition,
It the phenomenon that for because of ground problem or construction quality problem, causing upper building inclination, deformation, sedimentation and cracking, needs pair
The foundation pile of corresponding building carries out quality testing；And when repairing reinforcing, increment of load and add-story reconstruction to old buildings, it must
Inhering architecture base pile integrity and bearing capacity must be understood in advance, to make corresponding reinforcing and modification scheme；Therefore,
The pile quality that existing building is detected by accurate, high efficiency and low cost detection method, for understanding foundation pile bearing capacity,
Guarantee that upper building has very important significance safely.
Foundation pile is freely created different from stake end, the top stake end of existing building foundation pile is very hidden, and detection environment is multiple
Miscellaneous, testing result is hindered and is interfered larger, common method, such as drill core in pile detection at present by cushion cap, top-out structure
Method, static test, traditional height Strain Method etc. are not applicable, and as sound wave transmission method, then because needing the arrangement sound in stake in advance
Pipe, it is clear that be not suitable for the pile detection of existing building；For pile detection, traditional low strain dynamic method bounce technique is a kind of
More reliable foundation pile integrity detection method, but during the pile detection of existing building, because of its hammering positions and biography
Blocking of the sensor position by cushion cap and building structure, it is more difficult to directly be in contact with stake end, and this method can not know holding for foundation pile
Carry power；Traditional hydroelectric effect method is placed with high-voltage discharging electrode in bucket device, leads to by placing a bucket device at stake end
It crosses high pressure pulse discharge and generates pressure pulse excitation foundation pile top, the stake soil series is then received by the pressure sensor being placed in bucket
The dynamic response united under pressure pulse effect, and the vibration characteristics of stake soil series system is divided in time domain and frequency domain respectively
Analysis, infers property, the size and location of pile defect, and calculate foundation pile permitted bearing capacity, but hydroelectric effect method is in detection foundation pile
When, bucket need to be placed in foundation pile top, this is clearly not to be suitable for existing building pile detection.Patent CN85104819 is situated between
Continued a kind of method using hydroelectric effect test foundation pile integrity, and this method is produced in such a way that bucket to be placed in dress top
Raw exciting force, and a velocity sensor is placed in stake top or stake side, it uses auto-power spectrum mainly to judge pile quality, acquires
The mounting means of equipment can not still be suitable for the pile detection of existing building.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of quality of energy accurate judgement foundation pile, calculate base
The existing building quality inspection of the piles device of stake permitted bearing capacity and efficient low cost.
In order to solve the above-mentioned technical problem, the utility model provides a kind of existing building quality inspection of the piles dress
It sets comprising hydrophone, acceleration transducer, pulsed discharge focus equipment and data analysis system；The pulsed discharge focus
Equipment is equipped with pulse discharge electrode, and exciting hole and acquisition hole, the exciting hole and described are offered on the cushion cap at the top of foundation pile
The bottom hole in acquisition hole is the top of foundation pile, fills clear water in exciting hole, the pulse discharge electrode and the hydrophone are put
It sets in the exciting hole, the acceleration transducer is placed on the bottom hole in the acquisition hole, the hydrophone and the acceleration
Degree sensor is connect with the data analysis system respectively.
As the preferred scheme of the utility model, the exciting hole is arranged in the center of the foundation pile.
As the preferred scheme of the utility model, the acquisition hole is arranged in center three/2 half apart from the foundation pile
Path position.
As the preferred scheme of the utility model, the hydrophone is located at the middle part position on the lower side in the exciting hole.
As the preferred scheme of the utility model, the pressure sensitive face of the hydrophone is parallel to the bottom hole in the exciting hole
Plane.
As the preferred scheme of the utility model, the bottom hole in the acquisition hole is equipped with one layer of fast hard mortar, makes to acquire hole
The top of bottom hole leveling, fast hard mortar is provided with iron plate.
As the preferred scheme of the utility model, the plane of the iron plate is parallel to the end horizontal face of the foundation pile.
As the preferred scheme of the utility model, the acceleration transducer is adsorbed on the iron plate by magnetic attracting device.
As the preferred scheme of the utility model, the existing building quality inspection of the piles device further includes amplifier,
The hydrophone and the acceleration transducer are connect with the data analysis system respectively by the amplifier.
A kind of existing building quality inspection of the piles device for implementing the utility model has compared with prior art
It is following the utility model has the advantages that
(1) impact of the pulse discharge electrode in the exciting hole that the utility model is filled the water using cushion cap is as exciting force, pulse
The exciting force that discharge electrode electric discharge generates directly is transferred to the lower part pile body of transmitting foundation pile by aqueous medium, using exciting hole and adopting
The hydrophone and acceleration transducer placed in collection hole collect back wave pressure wave of the foundation pile under pulsed discharge percussion
Shape and back wave vibrational waveform, by collected data analyze can accurate judgement foundation pile quality, judge that pile body is
No existing defects, such as: the specific location of defect, type, size；In addition, the design in exciting hole and acquisition hole, avoids cushion cap mistake
Thickness causes shear wave energy decaying excessive.As it can be seen that the quality of the utility model energy accurate judgement foundation pile, at the same have it is efficient, low at
This advantages of.
(2) the utility model can be realized the non-destructive testing to existing building pile quality, compared to traditional low strain dynamic
Bounce technique, this method are impacted using the pulsed discharge in water injecting drilling (i.e. exciting hole) as exciting force, and housing basement can be solved
The problem of weight implements exciting is difficult to be utilized in equal narrow spaces, while the building such as avoid foundation pile top cushion cap, raft plate, shear wall
Interference of the object to detection process.
(3) the utility model conducts exciting force using aqueous medium, and the characteristic of shear strain can not be transmitted using water, can be very big
Ground reduces the interference of shear wave, surface wave to detection.
(4) the utility model is vibrated compared to traditional hydroelectric effect method using back wave pressure waveform curve and back wave
Wavy curve Synchronization Analysis foundation pile integrity, can greatly improve the precision of pile detection.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, the attached drawing of embodiment will be made below simple
Ground introduction.
Fig. 1 is a kind of structural schematic diagram of existing building quality inspection of the piles device provided by the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of preferred embodiment of existing building quality inspection of the piles device provided by the utility model,
It includes hydrophone 4, acceleration transducer 5, pulsed discharge focus equipment 8 and data analysis system 10；The pulsed discharge shake
Source device 8 is equipped with pulse discharge electrode 3, and exciting hole 7 and acquisition hole 6, the exciting are offered on the cushion cap 2 at 1 top of foundation pile
The bottom hole in hole 7 and the acquisition hole 6 is the top of foundation pile 1, fills clear water, the pulse discharge electrode 3 and institute in exciting hole 7
It states hydrophone 4 to be both placed in the exciting hole 7, the acceleration transducer 5 is placed on the bottom hole in the acquisition hole 6, described
Hydrophone 4 and the acceleration transducer 5 are connect with the data analysis system 10 respectively.
Pulsed discharge in the exciting hole 7 that the utility model is filled the water using cushion cap 2 as a result, is impacted as exciting force, and pulse is put
The exciting force that the electric discharge of electrode 3 generates directly is transferred to the lower part pile body of transmitting foundation pile 1 by aqueous medium, using respectively in exciting hole
7 collect reflection of the foundation pile 1 under pulsed discharge percussion with the hydrophone 4 and acceleration transducer 5 placed in acquisition hole 6
Wave pressure waveform and back wave vibrational waveform, by collected data analyze can accurate judgement foundation pile 1 quality, and
Based on dynamic measurement of pile principle, estimate the bearing capacity of foundation pile 1, judge pile body with the presence or absence of defect, such as: the specific location of defect, type,
Size etc.；In addition, the design in exciting hole 7 and acquisition hole 6, avoids cushion cap 2 is blocked up from causing shear wave energy decaying excessive.As it can be seen that this
The quality of utility model energy accurate judgement foundation pile 1 calculates 1 permitted bearing capacity of foundation pile, while having the advantages that efficient, inexpensive.
It should also be noted that, the utility model can realize the non-destructive testing to existing building pile quality, compared to biography
The low strain dynamic bounce technique of system, this method are impacted using the pulsed discharge in water injecting drilling as exciting force, and housing basement can be solved
The problem of weight implements exciting is difficult to be utilized in equal narrow spaces；The cushion cap, raft plate, shear wall on foundation pile top etc. is avoided simultaneously to build
Build interference of the object to detection process；Meanwhile the utility model conducts exciting force using aqueous medium, can not transmit shearing using water and answer
The characteristic of change can greatly reduce the interference of shear wave, surface wave to detection；In addition, the utility model is imitated compared to traditional water power
Ying Fa is greatly improved using back wave pressure waveform curve and back wave vibrational waveform curve Synchronization Analysis foundation pile integrity
The detection accuracy of foundation pile.
It illustratively, is the detection effect for ensuring hydroelectric effect method, the exciting hole 7 is located at the centre bit of the foundation pile 1
It sets, the acquisition hole 6 is arranged in 2/3rds radial location of center apart from the foundation pile 1.
Illustratively, the hydrophone 4 is located at the middle part position on the lower side in the exciting hole 7, the feeling of stress of the hydrophone 4
Face is answered to be parallel to the hole baseplane in the exciting hole 7, to guarantee the accuracy of 4 testing result of hydrophone.
Illustratively, after being drilled the acquisition hole 6, the bottom hole in acquisition hole 6 is flattened using fast hard mortar, in fast hard mortar
Top place iron plate, and the plane of the iron plate is made to be parallel to the end horizontal face of the foundation pile 1, the acceleration transducer
5 are firmly adsorbed on the iron plate by magnetic attracting device, and one layer of fast hard mortar is applied on mounting surface can increase out-of-flatness installation table
The connection reliability in face, iron plate can firmly fix acceleration transducer 5, guarantee the standard of 5 testing result of acceleration transducer
True property.
Illustratively, 1 quality detection device of existing building foundation pile further includes amplifier 9, the hydrophone 4 and institute
It states acceleration transducer 5 and is connected respectively with the data analysis system 10 by the amplifier 9, amplifier 9 can be to collecting
Signal carry out power amplification.
Include the following: using a kind of detecting step of existing building quality inspection of the piles device provided by the utility model
(1) it according to the positional relationship between foundation pile 1, cushion cap 2, upper building, determines for placing pulse discharge electrode 3
Exciting hole and for place acceleration transducer acquisition hole position and drilling depth, and use core drill machine drill
Hole is drilled the dross that bottom hole is cleaned out behind hole using core drilling rig.
After being drilled the acquisition hole 6, the bottom hole in acquisition hole 6 is flattened using fast hard mortar, is put on the top of fast hard mortar
Iron plate is set, and the plane of the iron plate is made to be parallel to the end horizontal face of the foundation pile 1, the acceleration transducer 5 is by magnetic
Device is firmly adsorbed on the iron plate, and one layer of fast hard mortar is applied on mounting surface can increase the connection of out-of-flatness mounting surface
Reliability, iron plate can firmly fix acceleration transducer 5, guarantee the accuracy of 5 testing result of acceleration transducer.
(2) clear water is filled into exciting hole, after filling clear water, pulse discharge electrode 3 and hydrophone is placed on exciting hole 7
In, and acceleration transducer is placed in acquisition hole 6.
(3) power supply of pulsed discharge focus equipment 8 is opened, and is charged to power supply, to hydrophone 4, acceleration sensing
After device 5, data analysis system enter acquisition state, electric discharge behaviour is carried out to the pulse discharge electrode 3 of pulsed discharge focus equipment 8
Make.
(4) data analysis system 10 collects the collected back wave pressure waveform of hydrophone 4 and acceleration transducer 5
Back wave vibrational waveform carry out time domain and frequency-domain analysis, judge pile body with the presence or absence of defect, including it is defect type, position, big
The information such as small；And Fourier transformation is carried out to back wave pressure waveform, back wave vibrational waveform, by spectrum curve feature into one
Step demonstrate,proves the judgement for pile body integrity.
It should also be noted that, further including the calculating step of foundation pile static load allowable bearing in the step (4): according to
The back wave pressure waveform curve of the collected foundation pile of hydrophone 4 calculates the dynamic stiffness of foundation pile vibration, substantially former according to dynamic measurement of pile
Reason obtains foundation pile static load allowable bearing size.In addition, the dimensional parameters according to foundation pile 1, are shaken by adjusting the pulsed discharge
The discharge voltage of source device 8 realizes the adjustment of exciting force size, repeats step (3) and step (4), passes through multi-group data pair
Than improving detection accuracy.
Above disclosed is only the preferred embodiment of the utility model, certainly cannot be practical new to limit this with this
The interest field of type, therefore equivalent variations made according to the patent scope of the utility model still belong to the utility model and are covered
Range.
Claims (9)
1. a kind of existing building quality inspection of the piles device, which is characterized in that including hydrophone, acceleration transducer, pulse
Focus equipment of discharging and data analysis system；The pulsed discharge focus equipment is equipped with pulse discharge electrode, at the top of foundation pile
Exciting hole and acquisition hole are offered on cushion cap, the exciting hole and the bottom hole for acquiring hole are the top of foundation pile, exciting hole
Clear water is inside filled, the pulse discharge electrode and the hydrophone are both placed in the exciting hole, the acceleration transducer
It is placed on the bottom hole in the acquisition hole, the hydrophone and the acceleration transducer connect with the data analysis system respectively
It connects.
2. existing building quality inspection of the piles device as described in claim 1, which is characterized in that the exciting hole is arranged in
The center of the foundation pile.
3. existing building quality inspection of the piles device as described in claim 1, which is characterized in that the acquisition hole is arranged in
2/3rds radial location of center apart from the foundation pile.
4. existing building quality inspection of the piles device as described in claim 1, which is characterized in that the hydrophone is located at institute
State the middle part position on the lower side in exciting hole.
5. existing building quality inspection of the piles device as described in claim 1, which is characterized in that the pressure of the hydrophone
Sensitive surface is parallel to the hole baseplane in the exciting hole.
6. existing building quality inspection of the piles device as described in claim 1, which is characterized in that the bottom hole in the acquisition hole
Equipped with one layer of fast hard mortar, make the bottom hole leveling for acquiring hole, the top of fast hard mortar is provided with iron plate.
7. existing building quality inspection of the piles device as claimed in claim 6, which is characterized in that the plane of the iron plate is flat
Row is in the end horizontal face of the foundation pile.
8. existing building quality inspection of the piles device as claimed in claim 7, which is characterized in that the acceleration transducer
It is adsorbed on the iron plate by magnetic attracting device.
9. existing building quality inspection of the piles device as described in claim 1, which is characterized in that it further include amplifier, institute
Hydrophone and the acceleration transducer is stated to connect with the data analysis system respectively by the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694243.XU CN209162913U (en) | 2018-10-15 | 2018-10-15 | A kind of existing building quality inspection of the piles device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694243.XU CN209162913U (en) | 2018-10-15 | 2018-10-15 | A kind of existing building quality inspection of the piles device |
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| Publication Number | Publication Date |
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| CN209162913U true CN209162913U (en) | 2019-07-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289374A (en) * | 2020-03-06 | 2020-06-16 | 许昌学院 | Novel quality detection system for cfg piles |
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2018
- 2018-10-15 CN CN201821694243.XU patent/CN209162913U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289374A (en) * | 2020-03-06 | 2020-06-16 | 许昌学院 | Novel quality detection system for cfg piles |
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