CN104652501A - Pile foundation quality detection device and pile foundation quality detection method of shock excitation in pile side prospect hole - Google Patents
Pile foundation quality detection device and pile foundation quality detection method of shock excitation in pile side prospect hole Download PDFInfo
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- CN104652501A CN104652501A CN201510072408.4A CN201510072408A CN104652501A CN 104652501 A CN104652501 A CN 104652501A CN 201510072408 A CN201510072408 A CN 201510072408A CN 104652501 A CN104652501 A CN 104652501A
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Abstract
The invention relates to the technical field of the detection of a pile foundation, and particularly relates to a pile foundation quality detection device of shock excitation in a pile side prospect hole. The pile foundation quality detection device comprises an acceleration sensor and a guide pipe, wherein the acceleration sensor is arranged on the side wall of the top of the pile foundation, the guide pipe is arranged in peripheral soil at the side of the pile foundation and is parallel to the pile foundation, the bottom end of the guide pipe is closed, the top end of the guide pipe is open, a shock excitation source capable of moving up and down is arranged in the guide pipe, the acceleration sensor receives a pile body response signal when the shock excitation source excites the vibration on various positions in the guide pipe, a processing unit acquires position information of the shock excitation source and output information of the acceleration sensor and processing the information to obtain the pile foundation quality information; in addition, the invention also relates to a detection method of the device. A drill hole is arranged by the side of the pile foundation, the shock excitation source is arranged in the drill hole, the pile body response signal is received by the acceleration sensor arranged by the side of the pile body, the position of the drill hole and the acceleration sensor is not subjected to the limitation of the pile top structure, and the pile foundation under construction or the pile foundation on active service can be detected.
Description
Technical field
The present invention relates to pile foundation detection field, particularly the reflection wave method device and method of exciting in a kind of side inspecting hole.
Background technology
Pile foundation is the power transmission rod member with certain Rigidity and strength imported into by superstructure load in Rock soil Foundation, compared with other base forms, have supporting capacity high, be out of shape that little, materials are economized, mechanization of building operation degree high, go for all kinds of geological conditions and various types of engineering construction, therefore its application in all types of industries and civil building engineering widely, and become the overriding concern base form of engineers.
As the pile foundation of carrying superstructure load, play vital effect to the safety of whole engineering structures, its workmanship is the key factor ensureing engineering structures safety.Because pile foundation belongs to buried underground concealed engineering in ground, method simply and intuitively cannot be adopted to detect its quality condition.Current existing detection means loads on stake top because of needs as static load test, has that cost is high, expend time in the feature such as long; And obtain more widely used low strain reflected wave method, exciting is pushed up by stake, what utilize is carry out detections analysis from the reflection wave signal being reflected back stake top at the bottom of stake top reaches again, be difficult to identify to shallow defects or too little defect, when foundation pile draw ratio is excessive, Pile side soil modulus of shearing is higher, obvious pile bottom reflection signal can not be obtained, when there is works more than stake top, except the exciting difficulty of stake top, the interfering signal that above works is pushed up in pile bottom reflection and stake superposes mutually, is more difficult to identify pile bottom reflection signal.
In addition, existing detection method such as low strain reflected wave method, sound wave transmission method, Large strain method and static test to push up the pile foundation of above non-structure thing mainly for construction period stake, for the pile foundation of military service engineering structures, as the pile foundation of the works such as bridge, harbour, Fang Jian of operation of being on active service, owing to more than stake top there is works, conventional detection method can not directly detect its quality.
Summary of the invention
Primary and foremost purpose of the present invention is the reflection wave method device providing exciting in a kind of side inspecting hole, can detect the pile foundation quality of construction period and the phase of military service reliably.
For realizing above object, the technical solution used in the present invention is: the reflection wave method device of exciting in a kind of side inspecting hole, comprise acceleration transducer, conduit, described acceleration transducer is arranged on the sidewall at pile foundation top, conduit to be arranged in the soil around pile of pile foundation side and parallel with pile foundation, conduit bottom end closure, top end opening, exciting source moving up and down is provided with in conduit, acceleration transducer receive exciting source in the catheter position exciting time pile body reaction signal, the output information of positional information and acceleration transducer that processing unit gathers exciting source also processes and obtains pile foundation quality information.
Compared with prior art, there is following technique effect in the present invention: by arranging boring at pile foundation side, and exciting source is arranged in the borehole, the acceleration transducer arranged by pile body side again receives pile body reaction signal, the position of boring and acceleration transducer, no longer by the restriction of stake roof construction thing, can be detected for the pile foundation in construction or in-service pile foundation.
Another object of the present invention is the pile foundation quality detection method providing exciting in a kind of side inspecting hole, can detect the pile foundation quality of construction period and the phase of military service reliably.
For realizing above object, the technical solution used in the present invention is: the pile foundation quality detection method of exciting in a kind of side inspecting hole, comprise the steps: that (A) is drilled with hole in the soil around pile of pile foundation side, hole is parallel with pile foundation, is furnished with the conduit of bottom end closure, top end opening in hole; (B) placed in the catheter by exciting source, acceleration transducer is arranged on the sidewall at pile foundation top; (C) transferred by certain spacing from top to bottom along conduit from the mouth of pipe by exciting source, (D) often transfers to a position, place, and exciting source starts exciting, and acceleration transducer receives pile body reaction signal simultaneously; (E) positional information of processing unit collection exciting source and the output information of acceleration transducer also process and obtain pile foundation quality information.
Compared with prior art, there is following technique effect in the present invention: by arranging boring at pile foundation side, and exciting source is arranged in the borehole, the acceleration transducer arranged by pile body side again receives pile body reaction signal, the position of boring and acceleration transducer, no longer by the restriction of stake roof construction thing, can be detected for the pile foundation in construction or in-service pile foundation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the present invention is to degree of depth oscillogram m-during intact pile measurement;
Fig. 3 is that the present invention is to degree of depth oscillogram m-during defectiveness pile measurement.
Detailed description of the invention
Below in conjunction with Fig. 1 to Fig. 3, the present invention is described in further detail.
Consult Fig. 1, the reflection wave method device of exciting in a kind of side inspecting hole, comprise acceleration transducer 10, conduit 20, described acceleration transducer 10 is arranged on the sidewall at pile foundation 70 top, conduit 20 to be arranged in the soil around pile of pile foundation 70 side and parallel with pile foundation 70, conduit 20 bottom end closure, top end opening, exciting source 30 moving up and down is provided with in conduit 20, acceleration transducer 10 receives the pile body reaction signal of exciting source 30 in conduit 20 during the exciting of position, the output information of positional information and acceleration transducer 10 that processing unit 40 gathers exciting source 30 also processes and obtains pile foundation 70 quality information.Send vibration by the exciting source 30 be arranged in conduit 20, receiving via degree sensor 10 accelerated after soil around pile, pile body conduction, acceleration transducer 10 exports processing unit 40 to after converting vibration information to the signal of telecommunication.Here, no matter the top of pile foundation 70 is with or without works, and the layout of acceleration transducer 10 and conduit 20 is all unaffected, and therefore, the pile foundation 70 that this checkout gear can detect the construction period also can detect the pile foundation 70 of military service phase, applicability very wide.When the test of reality, in conduit 20, loss or exciting source 30 rock thus have influence on the accuracy of test result in conduit 20 to some extent in the vibration sent to avoid exciting source 30 as far as possible, here can be provided with guide and limit unit between exciting source 30 and conduit 20, guide and limit unit ensures that exciting source 30 can only move along the above-below direction of conduit 20.
Preferably, in order to ensure that acceleration transducer 10 can detect the vibration signal of sufficient intensity, distance between conduit 20 and pile foundation 70 should be more near better, therefore, in the present embodiment, in the soil around pile of described pile foundation 70 side, be drilled with hole, the distance of hole and pile foundation 70 is less than or equal to 2 meters, certainly, distance too closely can have influence on again pile foundation 70 itself, unsuitable excessively near pile foundation 70 when setting.In addition, in order to intactly test the quality of whole pile foundation 70, exciting source 30 should transfer to enough dark position, and in the present embodiment, bottom hole, the degree of depth is greater than the degree of depth at least 3 meters bottom pile foundation 70, and conduit 20 is arranged in hole.
Particularly, in order to the quality of pile foundation 70, can be determined easily fast, reduce the treating capacity of processing unit 40 as far as possible, in the present embodiment preferably, information that described processing unit 40 exports according to the positional information of exciting source 30, acceleration transducer 10 rise time-degree of depth oscillogram, then according to time m-degree of depth oscillogram on Mintrop wave slope-inversion point or the position that significantly changes of wave amplitude obtain pile foundation quality information.
As preferred version of the present invention, described conduit 20 top side is provided with tripod 50, constant depth counter 60 on tripod 50, the wire pulley walked around on depth counter 60 that exciting source 30 is connected with processing unit 40 realizes the collection of depth counter 60 pairs of exciting source 30 positional informations, and depth counter 60 exports exciting source 30 positional information collected to processing unit 40.Tripod 50 is for constant depth counter 60, and when being transferred by exciting source 30, the wire that exciting source 30 is connected with processing unit 40 can drive pulley rotation, and depth counter 60 obtains according to the rotation number of turns of pulley the distance that exciting source 30 transfers.
In testing process, acceleration transducer 10 needs to gather the vibrational feedback signal of exciting source 30 when diverse location vibrates respectively, realizes transferring and positional information collection of exciting source 30 by tripod 50 and depth counter 60.Because exciting source 30 does not need exciting in the process transferred, and be parked in each position and just need exciting, conveniently operate, processing unit 40 described here sends control instruction and controls exciting source 30 exciting or stopping.Like this, often transfer to a position, exciting source 30 is started working, and stops after a period of operation, then continues to transfer to next position, and so repeatedly, until the bottom of conduit 20, a complete measuring process just calculates end.
Preferably, described conduit 20 is pvc pipe.Pvc pipe cost is low, good waterproof performance, and can not impact exciting source 30.
According to said apparatus, present invention also offers the pile foundation quality detection method of exciting in a kind of side inspecting hole, comprise the steps: that (A) is drilled with hole in the soil around pile of pile foundation 70 side, hole is parallel with pile foundation 70, is furnished with the conduit 20 of bottom end closure, top end opening in hole; (B) be placed in conduit 20 by exciting source 30, acceleration transducer 10 is arranged on the sidewall at pile foundation 70 top; (C) transferred by certain spacing from top to bottom along conduit 20 from the mouth of pipe by exciting source 30, (D) often transfers to a position, place, and exciting source 30 starts exciting, and acceleration transducer 10 receives pile body reaction signal simultaneously; (E) processing unit 40 gathers the output information of the positional information of exciting source 30 and acceleration transducer 10 and process obtains pile foundation quality information.In described steps A, the distance of hole and pile foundation 70 is less than or equal to 2 meters, and bottom hole, the degree of depth is greater than the degree of depth at least 3 meters bottom pile foundation 70; In described step D, processing unit 40 sends control instruction and controls exciting source 30 exciting or stopping.Method depends on above the device addressed, and what illustrated in device section is enough detailed, just repeats no more here.
As preferred version of the present invention, described step e processes as follows and obtains pile foundation 70 quality information: information that (E1) processing unit 40 exports according to the positional information of exciting source 30, acceleration transducer 10 rise time-degree of depth oscillogram; (E2) position of Mintrop wave slope-inversion point when determining in m-degree of depth oscillogram or wave amplitude significantly change place; (E3) pile foundation 70 quality is determined in the position significantly changed according to each flex point or wave amplitude.
Consult Fig. 2, Fig. 3, this measures for two different pile foundations 70 the time m-degree of depth oscillogram obtained, in figure, what adopt measures once every 0.5 meter, namely the distance at every turn transferred is 0.5 meter, each curve represents the vibration information that exciting source 30 collects at some positions exciting brief acceleration sensor 10, altogether acquires the data of dark 2 meters to 35 meters from underground.
In fig. 2, its Mintrop wave slope forms by two sections, there is obvious Mintrop wave slope-inversion point at the degree of depth 23 meters of, all the other positions have no obvious Mintrop wave slope-inversion point, the wave amplitude of its no abnormality seen is in a substantial change, can judge that these 23 meters of positions are position at the bottom of stake, and this pile foundation 70 quality is complete.
In figure 3, Mintrop wave slope forms by three sections, there is obvious Mintrop wave slope-inversion point respectively in the degree of depth 15 meters and 23 meters of, all the other positions have no obvious Mintrop wave slope-inversion point, and the wave amplitude of no abnormality seen significantly changes, can judge that 15 meters of exist pile defect, and position at the bottom of stake, 23 meters of.
Claims (9)
1. the reflection wave method device of exciting in a stake side inspecting hole, it is characterized in that: comprise acceleration transducer (10), conduit (20), described acceleration transducer (10) is arranged on the sidewall at pile foundation (70) top, conduit (20) to be arranged in the soil around pile of pile foundation (70) side and parallel with pile foundation (70), conduit (20) bottom end closure, top end opening, exciting source moving up and down (30) is provided with in conduit (20), acceleration transducer (10) receives the pile body reaction signal of exciting source (30) in conduit (20) during the exciting of position, the output information of positional information and acceleration transducer (10) that processing unit (40) gathers exciting source (30) also processes and obtains pile foundation (70) quality information.
2. the reflection wave method device of exciting in as claimed in claim 1 side inspecting hole, it is characterized in that: in the soil around pile of described pile foundation (70) side, be drilled with hole, the distance of hole and pile foundation (70) is less than or equal to 2 meters, bottom hole, the degree of depth is greater than pile foundation (70) the bottom degree of depth at least 3 meters, and conduit (20) is arranged in hole.
3. the reflection wave method device of exciting in as claimed in claim 1 side inspecting hole, it is characterized in that: information that described processing unit (40) exports according to the positional information of exciting source (30), acceleration transducer (10) rise time-degree of depth oscillogram, then according to time m-degree of depth oscillogram on Mintrop wave slope-inversion point or the position that significantly changes of wave amplitude obtain pile foundation quality information.
4. the reflection wave method device of exciting in as claimed in claim 1 side inspecting hole, it is characterized in that: described conduit (20) top side is provided with tripod (50), the upper constant depth counter (60) of tripod (50), the wire pulley walked around on depth counter (60) that exciting source (30) is connected with processing unit (40) realizes the collection of depth counter (60) to exciting source (30) positional information, depth counter (60) exports the exciting source collected (30) positional information to processing unit (40).
5. the reflection wave method device of exciting in as claimed in claim 1 side inspecting hole, is characterized in that: described processing unit (40) sends control instruction and controls exciting source (30) exciting or stopping.
6. the reflection wave method device of exciting in as claimed in claim 1 side inspecting hole, is characterized in that: described conduit (20) is pvc pipe.
7. the pile foundation quality detection method of exciting in the inspecting hole of stake side, comprises the steps:
(A) in the soil around pile of pile foundation (70) side, be drilled with hole, hole is parallel with pile foundation (70), is furnished with the conduit (20) of bottom end closure, top end opening in hole;
(B) be placed in conduit (20) by exciting source (30), acceleration transducer (10) is arranged on the sidewall at pile foundation (70) top;
(C) exciting source (30) is transferred by certain spacing along conduit (20) from top to bottom from the mouth of pipe,
(D) often transfer to a position, place, exciting source (30) starts exciting, and acceleration transducer (10) receives pile body reaction signal simultaneously;
(E) positional information of processing unit (40) collection exciting source (30) and the output information of acceleration transducer (10) also process and obtain pile foundation quality information.
8. the pile foundation quality detection method of exciting in as claimed in claim 7 side inspecting hole, it is characterized in that: in described steps A, the distance of hole and pile foundation (70) is less than or equal to 2 meters, and bottom hole, the degree of depth is greater than pile foundation (70) the bottom degree of depth at least 3 meters; In described step D, processing unit (40) sends control instruction and controls exciting source (30) exciting or stopping.
9. the pile foundation quality detection method of exciting in as claimed in claim 7 side inspecting hole, is characterized in that: described step e processes as follows and obtains pile foundation (70) quality information:
(E1) processing unit (40) export according to the positional information of exciting source (30), acceleration transducer (10) information rise time-degree of depth oscillogram;
(E2) position of Mintrop wave slope-inversion point when determining in m-degree of depth oscillogram or wave amplitude significantly change place;
(E3) pile foundation 70 quality is determined in the position significantly changed according to each flex point or wave amplitude.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072408.4A CN104652501B (en) | 2015-02-11 | 2015-02-11 | The reflection wave method device and method of exciting in the inspecting hole of stake side |
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| CN201510072408.4A CN104652501B (en) | 2015-02-11 | 2015-02-11 | The reflection wave method device and method of exciting in the inspecting hole of stake side |
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| CN104652501A true CN104652501A (en) | 2015-05-27 |
| CN104652501B CN104652501B (en) | 2016-11-16 |
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| CN201510072408.4A Expired - Fee Related CN104652501B (en) | 2015-02-11 | 2015-02-11 | The reflection wave method device and method of exciting in the inspecting hole of stake side |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105971031A (en) * | 2016-06-22 | 2016-09-28 | 昆山市建设工程质量检测中心 | Magnetic-induction-based pile length detection device for tubular pile construction and detection method |
| CN107190790A (en) * | 2017-07-12 | 2017-09-22 | 中交二航局第四工程有限公司 | A kind of drilled pile pile crown concrete quality detection device and detection method |
| CN108442419A (en) * | 2018-03-25 | 2018-08-24 | 宁波亿诺维信息技术有限公司 | Building foundation detection device and detection method |
| CN108487336A (en) * | 2018-04-21 | 2018-09-04 | 宁波亿诺维信息技术有限公司 | A kind of geotechnical engineering pile foundation quality detection method and detection device |
| CN108487337A (en) * | 2018-04-21 | 2018-09-04 | 宁波亿诺维信息技术有限公司 | Geotechnical engineering reflection wave method system |
| CN108560617A (en) * | 2018-05-05 | 2018-09-21 | 宁波亿诺维信息技术有限公司 | A kind of pile defect detection method |
| CN108625409A (en) * | 2018-04-05 | 2018-10-09 | 宁波亿诺维信息技术有限公司 | Civil engineering structure pile detection assessment system and method |
| CN108627231A (en) * | 2018-05-16 | 2018-10-09 | 五冶集团上海有限公司 | A kind of pile foundation method for detecting vibration |
| CN108956766A (en) * | 2018-06-09 | 2018-12-07 | 宁波亿诺维信息技术有限公司 | A kind of pile foundation quality detection method |
| CN112726685A (en) * | 2020-12-25 | 2021-04-30 | 华南理工大学 | Existing structure system pile foundation bearing capacity detection and durability evaluation 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 |
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| CN105971031A (en) * | 2016-06-22 | 2016-09-28 | 昆山市建设工程质量检测中心 | Magnetic-induction-based pile length detection device for tubular pile construction and detection method |
| CN107190790A (en) * | 2017-07-12 | 2017-09-22 | 中交二航局第四工程有限公司 | A kind of drilled pile pile crown concrete quality detection device and detection method |
| CN107190790B (en) * | 2017-07-12 | 2023-10-03 | 中交二航局第四工程有限公司 | Bored pile head concrete quality detection device and detection method |
| CN108442419A (en) * | 2018-03-25 | 2018-08-24 | 宁波亿诺维信息技术有限公司 | Building foundation detection device and detection method |
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| CN108487336B (en) * | 2018-04-21 | 2019-12-10 | 铁四院(湖北)工程监理咨询有限公司 | Geotechnical engineering pile foundation quality detection method |
| CN108487337A (en) * | 2018-04-21 | 2018-09-04 | 宁波亿诺维信息技术有限公司 | Geotechnical engineering reflection wave method system |
| CN110512662B (en) * | 2018-04-21 | 2021-09-21 | 西安航天建设监理有限公司 | Pile foundation quality detection method |
| CN108560617A (en) * | 2018-05-05 | 2018-09-21 | 宁波亿诺维信息技术有限公司 | A kind of pile defect detection method |
| CN108627231A (en) * | 2018-05-16 | 2018-10-09 | 五冶集团上海有限公司 | A kind of pile foundation method for detecting vibration |
| CN108956766A (en) * | 2018-06-09 | 2018-12-07 | 宁波亿诺维信息技术有限公司 | A kind of pile foundation quality detection method |
| CN112726685A (en) * | 2020-12-25 | 2021-04-30 | 华南理工大学 | Existing structure system pile foundation bearing capacity detection and durability evaluation 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 |
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