CN108442419B - Building foundation detection device and detection method - Google Patents
Building foundation detection device and detection method Download PDFInfo
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- CN108442419B CN108442419B CN201810248778.2A CN201810248778A CN108442419B CN 108442419 B CN108442419 B CN 108442419B CN 201810248778 A CN201810248778 A CN 201810248778A CN 108442419 B CN108442419 B CN 108442419B
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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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Abstract
A kind of building foundation quality detection device, comprising: the first shockwave sensor is set to foundation pile top-side；Second shockwave sensor is set to below the first shockwave sensor；Exciting wave duct is set in the drilling beside foundation pile；Exciting source can move up and down in exciting wave duct；Exciting source interval carries out exciting specifically to move down apart from step-length along exciting wave duct, which is equal to the distance of the first shockwave sensor and the second shockwave sensor；For exciting source when carrying out exciting, the first shockwave sensor and the second shockwave sensor measure stress wave signal；The Mintrop wave time of the first shockwave sensor described in a position, determines building foundation quality on the Mintrop wave time of data analyzer second shockwave sensor according to exciting source current location and exciting source.
Description
Technical field
The present invention relates to a kind of basic detection devices, more particularly, to civil engineering structure pile detection device and inspection
Survey method.
Background technique
Foundation pile plinth has been widely applied as a kind of Deep Foundation Structure form in field of civil engineering.Foundation pile plinth energy
It is enough that the self weight of superstructure and the load of receiving are transmitted in the steady soil contacted with foundation pile plinth, therefore largely
Reduce basis sedimentation and building differential settlement.Foundation pile plinth is high with bearing 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.
Foundation pile plinth can be divided into bored concrete pile and prefabricated pile by manufacture craft, and wherein the use of bored concrete pile is relatively broad, such as:
The engineerings such as bridge, highway, railway, skyscraper.But foundation pile is in construction manufacturing process, 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, lose extremely serious.Therefore, pile detection is just particularly important, only
It timely detects Defect Piles, takes the measure of effectively preventing, could greatly improve structural quality.
Currently, there are many China's pile foundation inspection methods, including bore extracting core process, sound wave transmission method, Large strain method and low
Strain Method etc..Wherein the reflective wave method in low strain dynamic hair is since its basic principle is simple, quick nondestructive, data interpretation are intuitive, quasi-
The higher main stream approach for becoming detection pile quality of exactness.The basic principle of low strain reflected wave method detection: apply wink in stake top
Sensor is sticked to stake top to receive pile body signal (such as acceleration signal, speed signal) by state exciting force.By the speed for analyzing stake
Response curve and vibratory response are spent to determine the defect of pile body.Swash however, conventional low strain reflected wave method is generated by stake top
Vibration, pile bottom reflection signal strength can be reduced when foundation pile draw ratio is excessive, and in addition stake top structure can also generate accumulation signal dry
It disturbs.
In the prior art, Research Institute of Highway Ministry of Transport proposes in the patent of invention of CN201510072408.4
The quality inspection of the piles device of exciting, is arranged exciting source in the soil around pile of foundation pile side, by setting in a kind of side inspecting hole
Set the stress wave signal in the sensor detection transmission of foundation pile top sidewall, according to when m- depth waveform diagram in Mintrop wave slope
The position of inflection point determines the position of the pile defect in foundation pile.
But in this method, need the exciting source it is raw successively to measure each depth from foundation pile top lower section to foundation pile bottom
At stress wave signal, m- depth waveform diagram, can determine the position of the pile defect in foundation pile when ultimately producing；Step
It is complicated and can not determine that the corresponding foundation pile of exciting Depth whether there is pile defect in real time in the detection process.
Summary of the invention
Improvement of the present invention as the prior art provides a kind of civil engineering structure pile detection device and method,
M- depth waveform diagram, can find pile defect in real time in the detection process when can not need to generate.
As one aspect of the present invention, a kind of building foundation quality detection device is provided, comprising: the first stress wave passes
Sensor is set to foundation pile top-side；Second shockwave sensor is set to below the first shockwave sensor；Exciting
Wave duct is set in the drilling beside foundation pile；Exciting source can be moved up and down by cable in exciting wave duct；Data
Analyzer handles the quality condition for determining foundation pile for analyzing；The exciting source interval apart from step-length along described specifically to swash
Vibration wave pipe moves down and carries out exciting, and the specific distance is equal to first shockwave sensor and the second stress wave
The distance of sensor；The exciting source is when carrying out exciting, first shockwave sensor and the second shockwave sensor
Measure stress wave signal；The Mintrop wave time of the data analyzer second shockwave sensor according to exciting source current location
And on exciting source the first shockwave sensor described in a position the Mintrop wave time, determine building foundation quality.
Preferably, the data analyzer calculates the Mintrop wave time of the second shockwave sensor described in exciting source current location
And on exciting source the difference of the Mintrop wave time of the first shockwave sensor described in a position absolute value, the value be less than setting
When threshold value, judge that there is no pile defects between a position on exciting source current location and exciting source；It is greater than setting threshold in the value
When value, judge that there are pile defects between a position on exciting source current location and exciting source.
Preferably, the setting threshold value is determined according to the detection accuracy of shockwave sensor.
Preferably, the exciting wave duct is pvc pipe.
As another aspect of the present invention, a kind of building foundation quality determining method is provided, is included the following steps:
(1) the first shockwave sensor is set in foundation pile top-side；(2) under the first shockwave sensor described in foundation pile top-side
The second shockwave sensor of side's setting；(3) the soil around pile drilling by foundation pile, is arranged exciting wave duct in the borehole；(4) with first
The distance between shockwave sensor and the second shockwave sensor are step-length, by cable by exciting source along exciting wave duct
It moves down and carries out exciting；(5) when exciting source carries out exciting in each position, first shockwave sensor and the
Two shockwave sensors measure stress wave signal；(6) data analyzer second stress wave according to exciting source current location passes
The Mintrop wave time of the first shockwave sensor described in a position, determines building foundation on the Mintrop wave time of sensor and exciting source
Quality.
Preferably, in the step (6), data analyzer calculates the second shockwave sensor described in exciting source current location
The Mintrop wave time and exciting source on the first shockwave sensor described in a position the Mintrop wave time difference absolute value, at this
When value is less than setting threshold value, judge that there is no pile defects between a position on exciting source current location and exciting source；In the value
When greater than setting threshold value, judge that there are pile defects between a position on exciting source current location and exciting source.
Detailed description of the invention
Fig. 1 is the schematic diagram of the building foundation quality detection device of the embodiment of the present invention.
Specific embodiment
In order to illustrate more clearly of technical solution of the present invention, embodiment will be used simply to be situated between the present invention below
Continue, it should be apparent that, be described below in be only one embodiment of the present of invention, for those of ordinary skill in the art come
It says, without any creative labor, other technical solutions can also be obtained according to these embodiments, also belonged to
Disclosure of the invention range.
The building foundation quality detection device of the embodiment of the present invention, referring to Fig. 1, including the first shockwave sensor 10,
Second shockwave sensor 20, exciting wave duct 30, exciting source 40 and data analyzer 50.
First shockwave sensor 10 and the second shockwave sensor 20 can be velocity sensor or acceleration passes
Sensor is respectively arranged at the side wall of 100 top end part of foundation pile, relays the stress wave signal for arriving its position for detecting.Wherein,
One shockwave sensor is located on the second shockwave sensor, and interval specific range, the specific range can be exciting source
40 step-length below exciting wave duct 30, such as 0.5m.
Exciting wave duct 30 is set in the drilling of 100 side of foundation pile, and parallel with foundation pile 100.Exciting wave duct 30 can be with
Using pvc pipe, end opening thereon, lower end closed.The horizontal distance of exciting wave duct 30 and foundation pile 100 is 1 ~ 2m, bottom depth
It is 3 ~ 4m longer than the bottom depth of foundation pile 100.
Exciting source 40 can be moved up and down by cable in exciting wave duct 30, thus in the difference of exciting wave duct 30
Depth carries out exciting.Can acquisition by depth counter to 40 location information of exciting source, depth counter will be collected
Exciting source location information is exported to data analyzer 50.The step-length that exciting source 40 moves in exciting wave duct 30 is equal to the first stress
The distance between wave sensor 10 and the second shockwave sensor 20.To make exciting source 40 generate exciting letter in current location 31
Number when, the propagation distance of the second shockwave sensor of stress wave propagation 20, be equal to exciting source 40 a upper position 32 generate exciting
When signal, the propagation distance of the first shockwave sensor of stress wave propagation 10.Stress wave is in 100 communication process of pile foundation, when sharp
When pile defect is not present in vibration source 40 between current location and a upper position, propagation distance is equal, then stress wave reaches
The time of first shockwave sensor 10 is equal to the time for reaching the second shockwave sensor 20；When exciting source 40 is in current location
And there are when pile defect 110 between a upper position, the pile defect 100 of influence due to to(for) Spreading Velocity of Stress Wave is led
Its spread speed is caused to become smaller, but propagation distance is equal, then stress wave reaches the first stress wave by pile body in a upper position and passes
The time of sensor 10 is less than the time that stress wave reaches the second shockwave sensor 20 in current location by pile body.
Data analyzer 50 handles the quality condition for determining foundation pile 100 for analyzing, and judges that the pile body in foundation pile 100 lacks
Sunken position.Specifically, data analyzer 50 calculate 40 current location 31 of exciting source when the second shockwave sensor 20 Mintrop wave
The absolute value of the difference of the Mintrop wave time of first shockwave sensor of position 10, is less than in the value on time and exciting source 40
When threshold value is set, judge that there is no pile defects between a position on 40 current location of exciting source and exciting source 40；It is big in the value
When threshold value is set, judge that there are pile defects between a position on 40 current location of exciting source and exciting source 40.The threshold value can
To be determined according to the detection accuracy of shockwave sensor.
The building foundation quality determining method of the embodiment of the present invention includes the following steps: (1) in 100 top side of foundation pile
The first shockwave sensor 10 is arranged in face；(2) setting second is answered below 100 the first shockwave sensor of top-side 10 of foundation pile
Wave sensor 20；(3) in the soil around pile drilling on 100 side of foundation pile, exciting wave duct 30 is set in the borehole；(4) with the first stress
The distance between wave sensor 10 and the second shockwave sensor 20 are step-length, by cable by exciting source 40 along exciting wave
Pipe 30 moves down and carries out exciting；(5) exciting source 40 each position carry out exciting when, the first shockwave sensor 10 with
And second shockwave sensor 20 measure stress wave signal；(6) the second stress wave when 40 current location of data analyzer exciting source
On the Mintrop wave time of sensor 20 and exciting source 40 when a position the first shockwave sensor 10 the Mintrop wave time, calculate exciting
First stress wave of position passes on the Mintrop wave time of the second shockwave sensor 20 and exciting source 40 when 40 current location 31 of source
The absolute value of the difference of the Mintrop wave time of sensor 10 judges 40 current location of exciting source and swashs when the value is less than setting threshold value
Pile defect is not present on vibration source 40 between a position；The value be greater than setting threshold value when, judge 40 current location of exciting source with
There are pile defects between a position on exciting source 40.The threshold value can be determined according to the detection accuracy of shockwave sensor.
Compared with prior art, building foundation detection device and detection method through the embodiment of the present invention, can
The stress wave signal of the node of the position is not needed to obtain, Production Time-depth waveform diagram in the detection process can be real-time
It was found that pile defect, to improve detection efficiency.
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 (4)
1. a kind of building foundation quality detection device, comprising: the first shockwave sensor is set to foundation pile top-side；
Second shockwave sensor is set to below the first shockwave sensor；Exciting wave duct, the drilling being set to beside foundation pile
It is interior；Exciting source can be moved up and down by cable in exciting wave duct；Data analyzer determines foundation pile for analyzing to handle
Quality condition；It is characterized by: the exciting source moved down as step-length along the exciting wave duct using specific distance and into
Row exciting, the specific distance are equal to the distance of first shockwave sensor and the second shockwave sensor；It is described
For exciting source when carrying out exciting, first shockwave sensor and the second shockwave sensor measure stress wave signal；Swash
When stress wave is equal to a position on exciting source to the propagation distance of the second shockwave sensor from exciting source when vibration source current location
Stress wave is from exciting source to the propagation distance of the first shockwave sensor；When the data analyzer calculates exciting source current location
On the Mintrop wave time of second shockwave sensor and exciting source when a position described in the first shockwave sensor Mintrop wave
The absolute value of the difference of time, when the value is less than setting threshold value, judge on exciting source current location and exciting source a position it
Between be not present pile defect；When the value is greater than setting threshold value, judge on exciting source current location and exciting source between a position
There are pile defects.
2. building foundation quality detection device according to claim 1, it is characterised in that: the setting threshold value is according to answering
The detection accuracy of wave sensor determines.
3. building foundation quality detection device according to claim 2, it is characterised in that: the exciting wave duct is PVC
Pipe.
4. a kind of building foundation quality determining method of building foundation quality detection device according to claim 1,
Include the following steps: that the first shockwave sensor is arranged in foundation pile top-side in (1)；(2) first described in the foundation pile top-side
Second shockwave sensor is set below shockwave sensor；(3) the soil around pile drilling by foundation pile, is arranged exciting in the borehole
Wave duct；(4) with the distance between the first shockwave sensor and the second shockwave sensor for step-length, by cable by exciting
Source moves down along exciting wave duct and carries out exciting；(5) when exciting source carries out exciting in each position, first stress
Wave sensor and the second shockwave sensor measure stress wave signal；Stress wave is from exciting source to when exciting source current location
Stress wave is from exciting source to the first shockwave sensor when the propagation distance of two shockwave sensors is equal to a position on exciting source
Propagation distance；(6) data analyzer calculate exciting source current location described in the second shockwave sensor the Mintrop wave time and
The absolute value of the difference of the Mintrop wave time of first shockwave sensor described in a position on exciting source is less than setting threshold value in the value
When, judge that there is no pile defects between a position on exciting source current location and exciting source；When the value is greater than setting threshold value,
Judge that there are pile defects between a position on exciting source current location and exciting source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810248778.2A CN108442419B (en) | 2018-03-25 | 2018-03-25 | Building foundation detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810248778.2A CN108442419B (en) | 2018-03-25 | 2018-03-25 | Building foundation detection device and detection method |
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| CN108442419A CN108442419A (en) | 2018-08-24 |
| CN108442419B true CN108442419B (en) | 2019-09-06 |
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| CN201810248778.2A Active CN108442419B (en) | 2018-03-25 | 2018-03-25 | Building foundation detection device and detection method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111042215A (en) * | 2018-10-15 | 2020-04-21 | 广州市市政工程试验检测有限公司 | Existing building foundation pile quality detection method and device |
| CN109469114B (en) * | 2018-11-23 | 2020-11-03 | 中国建筑科学研究院有限公司 | Low-strain existing foundation pile integrity detection method capable of eliminating upper structure influence |
| CN111638269B (en) * | 2020-05-26 | 2021-08-03 | 浙江大学 | Pile side pressing-in probe transmitted wave detection method for high bearing platform pile quality detection |
| CN111851607A (en) * | 2020-07-09 | 2020-10-30 | 广东雄炜建筑工程检测有限公司 | Construction engineering foundation pile detection method |
| CN113835122A (en) * | 2021-09-30 | 2021-12-24 | 中铁二十四局集团有限公司 | Method for determining pile side position by using pile side hole reflection wave method |
| CN117871293B (en) * | 2024-03-11 | 2024-05-28 | 四川嘉乐地质勘察有限公司 | Self-correction-based high strain force detection method and detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007033139A (en) * | 2005-07-25 | 2007-02-08 | Railway Technical Res Inst | Soundness diagnosing system and soundness diagnosing method |
| JP4667228B2 (en) * | 2005-12-21 | 2011-04-06 | 株式会社竹中工務店 | Pile inspection method and sensor crimping device |
| JP5009873B2 (en) * | 2008-07-30 | 2012-08-22 | 鹿島建設株式会社 | Support layer arrival detection device and detection method at tip of cast-in-place pile |
| CN101570974A (en) * | 2009-03-26 | 2009-11-04 | 浙江省建筑科学设计研究院有限公司 | Method for detecting quality of existing building foundation piles with parallel seismic method |
| CN103953076B (en) * | 2014-05-06 | 2016-01-13 | 上海交通大学 | Based on depth determination method at the bottom of the existing engineering pile stake of other hole transmitted wave bathmometry |
| CN104652501B (en) * | 2015-02-11 | 2016-11-16 | 交通运输部公路科学研究所 | The reflection wave method device and method of exciting in the inspecting hole of stake side |
| CN105973982B (en) * | 2016-05-06 | 2018-10-12 | 武汉中岩科技股份有限公司 | A kind of combined wireless foundation pile acoustic detection device and its control method |
| CN105842341B (en) * | 2016-05-18 | 2018-06-12 | 北京市康科瑞工程检测技术有限责任公司 | A kind of test of intelligentized sound wave transmission method detection foundation pile integrity and analysis method |
| CN107167521A (en) * | 2017-06-30 | 2017-09-15 | 四川升拓检测技术股份有限公司 | A kind of detection method for improving identification concrete defect and lesion capability |
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