CN108547332A - A kind of buildings pile detection technique - Google Patents
A kind of buildings pile detection technique Download PDFInfo
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- CN108547332A CN108547332A CN201810451492.4A CN201810451492A CN108547332A CN 108547332 A CN108547332 A CN 108547332A CN 201810451492 A CN201810451492 A CN 201810451492A CN 108547332 A CN108547332 A CN 108547332A
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- wave
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- differential signal
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of buildings pile detection technique, pass through side hole transmitted wave method detection of pier foundation quality, differential signal is set wherein by detection pipe and generates column, differential signal, which is detected, by wave detector generates the mechanical wave signals that capital generates, Difference Calculation is carried out for the mechanical wave signals generated at the top of pile foundation, Mintrop wave slope-inversion point in the time depth oscillogram generated by differential signal, determines the quality condition of pile foundation.Buildings pile detection technique through the invention can improve the accuracy and reliability of pile defect detection.
Description
Technical field
The present invention relates to civil engineering pile foundation engineering quality testing fields, passing through side hole transmitted wave method more particularly, to one kind
The device and method for detecting building pile quality.
Background technology
Pile foundation has been widely applied as a kind of Deep Foundation Structure form in field of civil engineering.Pile foundation energy
It is enough that the dead weight of superstructure and the load born are transmitted in the steady soil contacted with pile foundation, therefore largely
Reduce basis sedimentation and building differential settlement.Pile foundation have high capacity, settling amount is small, shock resistance is strong
The advantages that, it is widely applied in the area of some complex geologic conditions, soft, the more earthquake of soil property, and obtained considerable effect.
Pile foundation can be divided into bored concrete pile and prefabricated pile by manufacture craft, the use of wherein bored concrete pile be it is relatively broad, such as：
The engineerings such as bridge, highway, railway, skyscraper.But pile foundation is in manufacturing process of constructing, because of construction technology, personnel's operation, outer
Easily there is broken pile, expansion neck, undergauge, isolation, folder mud, sediment, cavity etc. and lacks in the influence of the factors such as boundary's condition and quality of materials
Fall into, these defects are exactly the potential risk of building, greatly affected the quality of building, once fault location load not on
The quality of portion's structure, will result in building collapse, and loss is extremely serious.Therefore, pile measurement is just particularly important, only
It timely detects Defect Piles, takes effective control measure, could greatly improve structural quality.
It is a kind of lossless detection method of pile foundation quality that side hole, which transmits wave detecting method, by being hammered into shape with exciting on stake top face
It taps and generates mechanical wave, sensor is utilized in the hole propagated along pile body and soil layer, while be drilled in advance beside stake
Receive transmitted wave signal,
Thus read different depth wave when and the when of drafting m- depth map, sentenced by the changed position of Mintrop wave slope in figure
The quality of broken pile base.
However, mechanical wave is after traveling to pile soil horizon by pile foundation, to pass through pile soil horizon in side hole transmission wave detecting method
It is transmitted to sensor, there are the propagation paths in pile soil horizon.When the unevenness larger there are impedance difference in pile soil horizon
When even layering, for example there is when soft clay stratum and competent bed, since spread speed of the mechanical wave in different layerings is different,
Different soil and soil layer intersection, as shown in Figure 1, most short propagation path and time of the mechanical wave in soil layer are different,
Cause the Mintrop wave time that sensor detects different from the Mintrop wave time in uniform soil layer, so as to Mintrop wave slope-inversion point occur
The case where misjudgment, so as to cause the signal to the pile defect to make mistake.
Invention content
Improvement of the present invention as the prior art proposes a kind of side hole transmission wave detecting method of buildings pile quality,
Pile defect also can be accurately detected in pile soil horizon there are when uneven soil layer.
As one aspect of the present invention, a kind of buildings pile detection device is provided, including：Exciting is hammered into shape, in stake
Mechanical wave is generated at the top of base；Drilling machine is used to be formed about drilling in pile foundation；Detection pipe, setting in the borehole, manage interior note
Qing Dynasty's water, for placing wave detector；Wave detector, the different depth being used in detection pipe receive exciting hammer and are produced at the top of pile foundation
Raw mechanical wave；Analyzer determines pile foundation quality and defective locations for the detection signal according to wave detector；Differential signal
Column is generated, length is identical as pile foundation, pile foundation is equal at a distance from the detection pipe at a distance from the detection pipe, the inspection
Different depth of the wave device in detection pipe also receives exciting hammer and generates the mechanical wave that capital generates in differential signal；The analyzer
The Mintrop wave time of the mechanical wave signals generated at the top of the pile foundation received according to the wave detector and differential signal generate capital production
The difference value of the Mintrop wave time of raw mechanical wave signals, determines pile foundation quality and defective locations.
Preferably, pile foundation about 1 ~ 2m described in the hole spacing.
Preferably, the detection pipe is pvc pipe.
Preferably, the mechanical wave generates spread speed of the spread speed more than pile foundation of column in differential signal.
Preferably, it is reinforcing bar that the differential signal, which generates column,.
Preferably, layer of ground soil where the pile foundation includes soft clay stratum and competent bed.
Preferably, affiliated wave detector can be transferred with particular step size along the detection pipe by cable.
As another aspect of the present invention, the pile measurement method of above-mentioned buildings pile detection device is provided, is wrapped
Include following steps：（1）Wave detector is placed into certain depth with particular step size along the detection pipe；（2）It is reached in wave detector
Behind the designated position of detection pipe：（2.1）The first mechanical wave is generated at the top of pile foundation by exciting hammer；（2.2）It is examined by wave detector
It surveys exciting and hammers the first mechanical wave signals generated at the top of pile foundation into shape；（2.3）Capital is generated by exciting hammer in differential signal to generate
Second mechanical wave；（2.4）Exciting hammer, which is detected, by wave detector generates the second mechanical wave signals that capital generates in differential signal；
（2.6）Analyzer recording step（2）The position of middle wave detector, step（2.2）And（2.4）In the first mechanical wave signals and
Second mechanical wave signals；（3）Repeat step（1）~（2）Until wave detector reaches detection bottom of the tube；（4）The analyzer is according to step
Suddenly（2.6）The information of middle record determines pile foundation quality and defective locations.
Preferably, the analyzer determines wave detector second machine in each depth respectively according to the second mechanical wave signals
Tool wave reaches the Mintrop wave time t1 of wave detector；The time t2 for the first mechanical wave signals that each depth of wave detector is received, subtracts
It goes the second mechanical wave to reach the Mintrop wave time t1 of wave detector, obtains Differential time t；According to the depth of wave detector, Differential time t with
And the first mechanical wave signals amplitude that wave detector detects when corresponding to the time t2 of Differential time t, generate Differential time-depth waveform
Figure, according to Mintrop wave slope-inversion point in Differential time-depth oscillogram, determines the quality condition of pile foundation.
Preferably, if the Mintrop wave slope-inversion point in Differential time-depth oscillogram is equal to the depth of pile foundation, the stake is indicated
Matrix amount is good, and pile defect is not present；If the Mintrop wave slope-inversion point in Differential time-depth oscillogram is less than the depth of pile foundation
Degree, then the corresponding depth of Mintrop wave slope-inversion point is the position there are pile defect.
Description of the drawings
Fig. 1 is that there are the most short propagation paths of mechanical wave when different soil for prior art side hole transmitted wave method.
Fig. 2 is the schematic diagram of geotechnical engineering reflection wave method system of the embodiment of the present invention.
Specific implementation mode
In order to illustrate more clearly of technical scheme of the present invention, embodiment will be used simply to be situated between the present invention below
It continues, it should be apparent that, in being described below is only one embodiment of the present of invention, and those of ordinary skill in the art are come
It says, without having to pay creative labor, other technical solutions can also be obtained according to these embodiments, also belonged to
Disclosure of the invention range.
Referring to Fig. 1, the propagation path that mechanical wave reaches sensor in the prior art includes biography of the exciting hammer Mintrop wave in pile foundation
Broadcast the path L2 and propagation path L1 in pile soil horizon.When there are larger uneven points of impedance difference in pile soil horizon
When layer 1 and layering 2, when the pathway of mechanical wave only includes layering 1 or layering 2, propagation distance L3 and the L4 phase in soil layer
Together, but its speed is different；When mechanical wave sensory path includes layering 1 or layering 2 simultaneously, transmission range L5 and biography
Defeated time and the L3 and L4 of only single layer soil layer are different；At this point, leading to the Mintrop wave time that sensor detects and uniform soil layer
In the Mintrop wave time it is different, so as to the case where Mintrop wave slope-inversion point misjudgment occur, so as to cause to the stake to make mistake
The signal of body defect.
The buildings pile detection device of the embodiment of the present invention, referring to Fig. 2, including：Exciting hammer 10, drilling machine（Do not show
Go out）, detection pipe 20, wave detector 30, differential signal generates column 40 and analyzer 50.
Exciting hammer 10 can be hand hammer and power stick, for raw at 100 top of pile foundation and 40 tops of differential signal generation column
At mechanical wave.
Drilling machine, for being formed about drilling in drilling machine, hole spacing 1 ~ 2m of pile foundation, center line in pile foundation 100
Mandrel line is parallel.The depth of drilling is deeper 2 ~ 3m than the depth of pile foundation.After drilling machine forms drilling, detection pipe 20 is set to drilling
In, it is subsequently filled the gap between drilling and detection pipe 20.
Detection pipe 20 can be pvc pipe, thereon end opening, lower end closed, after being positioned in drilling, be filled into pipe
Clear water is used for the propagation of mechanical wave signals.
Differential signal generates column 40, is equal to pile foundation at a distance from the equal length of length and pile foundation 100, with detection pipe 20
100 at a distance from detection pipe 20.Exciting hammer 10 can generate 40 top of column in differential signal and generate mechanical wave, be produced in differential signal
The mechanical wave that 40 top of raw column generates reaches the soil layer propagation path of detection pipe 20 by soil layer, with the machine generated at the top of pile foundation
Soil layer the propagation path L1 ' and L1 that tool wave reaches detection pipe 20 by soil layer are equal, and the propagation time, Ta ' and Ta were also identical.It can
To use such as whole reinforcing bar to make the stress wave that exciting source 10 generates in differential signal as the material of differential signal generation column 40
The spread speed for generating column 40 is more than the spread speed in pile foundation 100.
Wave detector 30 can be transferred by cable with particular step size such as 0.5m along detection pipe 20, for detecting
Different depth receives the first mechanical wave of 100 top generation of pile foundation successively in pipe 20 and differential signal generates what column 40 generated
Second mechanical wave.
The Mintrop wave time for the first mechanical wave signals that 100 top of pile foundation that analyzer 50 is received according to wave detector 30 generates with
And differential signal generates the difference value of the Mintrop wave time for the second mechanical wave signals that column 40 capital generates, determine pile foundation quality and
Defective locations.
The pile measurement method of the buildings pile detection device of the embodiment of the present invention, includes the following steps：（1）By detection
Device 30 is sequentially placed certain depth with particular step size along detection pipe 20；（2）The specified of detection pipe 20 is reached in wave detector 30
Behind position：（2.1）By exciting hammer 10 the first mechanical wave is generated at 100 top of pile foundation；（2.2）Exciting is detected by wave detector 30
The first mechanical wave signals that hammer 10 generates at 100 top of pile foundation；（2.3）By exciting hammer 10 40 capital of column is generated in differential signal
Generate the second mechanical wave；（2.4）Exciting hammer 10, which is detected, by wave detector 30 generates second that 40 capital of column generates in differential signal
Mechanical wave signals；（2.6）50 recording step of analyzer（2）The position of middle wave detector, step（2.2）And（2.4）In first
Mechanical wave signals and the second mechanical wave signals；（3）Repeat step（1）~（2）Until wave detector 30 reaches 20 bottom of detection pipe；
（4）Analyzer 50 is according to step（2.6）The information of middle record determines pile foundation quality and defective locations.
Specifically, analyzer 50 according to the second mechanical wave signals, determines second machine in each depth of wave detector 20 respectively
Tool wave reaches the Mintrop wave time t1 of wave detector 20；The time for the first mechanical wave signals that 20 each depth of wave detector is received
T2 subtracts the Mintrop wave time t1 that the second mechanical wave reaches wave detector 20, obtains Differential time t；It is poor according to the depth of wave detector 20
The first mechanical wave signals amplitude that wave detector 20 detects when the time t2 of t and corresponding Differential time t between timesharing, when generating difference
M- depth oscillogram determines the quality condition of pile foundation according to Mintrop wave slope-inversion point in Differential time-depth oscillogram.If poor
Mintrop wave slope-inversion point in the m- depth oscillogram of timesharing is equal to the depth of pile foundation, indicates that 100 mass of pile foundation is good, is not present
Pile defect；If the Mintrop wave slope-inversion point in Differential time-depth oscillogram is less than the depth of pile foundation 100, the Mintrop wave is oblique
The corresponding depth of rate inflection point is the position there are pile defect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.This hair
Particular features, structures, materials, or characteristics described in bright can be in any one or more of the embodiments or examples with suitable
Mode combines.In addition, without conflicting with each other, those skilled in the art can be by difference described in this specification
The feature of embodiment or example and different embodiments or examples is combined.It is all the spirit and principles in the present invention it
Interior any modification, equivalent replacement, improvement and so on, are included within the scope of protection of the present invention.
Claims (5)
1. a kind of buildings pile detection device, including：Exciting is hammered into shape, for generating mechanical wave at the top of pile foundation；Drilling machine is used
In being formed about drilling in pile foundation；Detection pipe, setting in the borehole, fill clear water, for placing wave detector in pipe；Detection
Device, the different depth being used in detection pipe receive exciting and hammer the mechanical wave generated at the top of pile foundation into shape；Analyzer is used for basis
The detection signal of wave detector, determines pile foundation quality and defective locations；It is characterized in that：Further include that differential signal generates column,
Length is identical as pile foundation, pile foundation is equal at a distance from the detection pipe at a distance from the detection pipe, the wave detector is being examined
Different depth in test tube also receives exciting hammer and generates the mechanical wave that capital generates in differential signal；The analyzer is according to
The Mintrop wave time of the mechanical wave signals generated at the top of the pile foundation that wave detector receives and differential signal generate the machinery that capital generates
The difference value of the Mintrop wave time of wave signal, determines pile foundation quality and defective locations.
2. buildings pile detection device according to claim 1, it is characterised in that：Pile foundation described in the hole spacing is about
1~2m。
3. buildings pile detection device according to claim 2, it is characterised in that：The mechanical wave is produced in differential signal
The spread speed of raw column is more than the spread speed of pile foundation.
4. buildings pile detection device according to claim 3, it is characterised in that：Affiliated wave detector can be with by cable
It is transferred with particular step size along the detection pipe.
5. a kind of pile measurement method of buildings pile detection device using one of the claims, including walk as follows
Suddenly：（1）Wave detector is placed into certain depth with particular step size along the detection pipe；（2）Detection pipe is reached in wave detector
Behind designated position：（2.1）The first mechanical wave is generated at the top of pile foundation by exciting hammer；（2.2）Exciting hammer is detected by wave detector
The first mechanical wave signals generated at the top of pile foundation；（2.3）Capital is generated in differential signal generate the second machinery by exciting hammer
Wave；（2.4）Exciting hammer, which is detected, by wave detector generates the second mechanical wave signals that capital generates in differential signal；（2.6）Analysis
Instrument recording step（2）The position of middle wave detector, step（2.2）And（2.4）In the first mechanical wave signals and second machinery
Wave signal；（3）Repeat step（1）~（2）Until wave detector reaches detection bottom of the tube；（4）The data analyzer is according to step
（2.6）The information of middle record determines pile foundation quality and defective locations.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810451492.4A CN108547332B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection technology |
| CN201911331134.0A CN110905012B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810451492.4A CN108547332B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection technology |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911331134.0A Division CN110905012B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection method |
Publications (2)
| Publication Number | Publication Date |
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| CN108547332A true CN108547332A (en) | 2018-09-18 |
| CN108547332B CN108547332B (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810451492.4A Active CN108547332B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection technology |
| CN201911331134.0A Expired - Fee Related CN110905012B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911331134.0A Expired - Fee Related CN110905012B (en) | 2018-05-12 | 2018-05-12 | Building pile foundation detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735452A (en) * | 2019-10-26 | 2020-01-31 | 宁波亿诺维信息技术有限公司 | construction engineering pile foundation integrity and defect detection method |
| CN112343101A (en) * | 2020-11-05 | 2021-02-09 | 房磊 | Pile foundation detection counterforce device |
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| CN105672371A (en) * | 2015-10-26 | 2016-06-15 | 四川省建筑科学研究院 | Existing engineering pile body completeness and defect type judging method |
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| JP2017090101A (en) * | 2015-11-05 | 2017-05-25 | 株式会社モニタリングサービス | Non-destructive inspection method and non-destructive inspection system of prefabricated concrete pile installed underground |
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| WO2004083534A1 (en) * | 2003-03-17 | 2004-09-30 | Slaughter Scott H | Parallel seismic depth testing using a cone penetrometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735452A (en) * | 2019-10-26 | 2020-01-31 | 宁波亿诺维信息技术有限公司 | construction engineering pile foundation integrity and defect detection method |
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| CN112343101A (en) * | 2020-11-05 | 2021-02-09 | 房磊 | Pile foundation detection counterforce device |
| CN112343101B (en) * | 2020-11-05 | 2021-09-17 | 房磊 | Pile foundation detection counterforce device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110905012A (en) | 2020-03-24 |
| CN108547332B (en) | 2020-06-16 |
| CN110905012B (en) | 2021-06-25 |
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