CN100419170C - Torsional vibration exciter for pile foundation detection - Google Patents
Torsional vibration exciter for pile foundation detection Download PDFInfo
- Publication number
- CN100419170C CN100419170C CNB2006100183243A CN200610018324A CN100419170C CN 100419170 C CN100419170 C CN 100419170C CN B2006100183243 A CNB2006100183243 A CN B2006100183243A CN 200610018324 A CN200610018324 A CN 200610018324A CN 100419170 C CN100419170 C CN 100419170C
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- pile foundation
- cross bar
- pipe
- pair
- crossbeam
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Abstract
The present invention relates to a pile foundation detecting torsion vibration exciter which is characterized in that the present invention comprises a cross beam and a pair of transverse rods, wherein the cross beam is arranged on a pile foundation breadthways and can rotate relative to the present invention; the transverse rods are respectively locked at two symmetric sides of the pile foundation. Upright rods are respectively arranged at the lower parts of the two symmetric sides of the cross beam, wherein a vertical rod at one side is positioned above a transverse rod at the same side, and the vertical rod at the other side is positioned at the back part of the transverse rod at the same side, so that the vertical rod can simultaneously push a pair of the transverse rods to generate torque through the driving of the cross beam. The present invention can generate torque excitation on the pile foundation, and thereby, the defect that the pile foundation in different depth can be detected conveniently.
Description
Technical field
The present invention relates to a kind of torsional vibration exciter for pile foundation detection.
Background technology
At present in the low strain detecting work of pile foundation quality integrality, substantially all be based on the back wave detection method of compressional wave theory, and longitudinal wave velocity is very fast, detect inaccurate for large diameter pile foundation pile top superficial part, and detection method is single, can't realize quantitative detection truly, though waveform stabilization is arranged and adopt based on the dynamic testing method of shearing torsional wave, be easy to judge shallow defects, replenishing advantages such as compressional wave judged result, is the method key in application but how to produce a top torsional excitation, therefore, invention is used for the apparatus that pile foundation is reversed the Dynamic Non-Destruction Measurement exciting, is significant.
Summary of the invention
The object of the present invention is to provide a kind of torsional vibration exciter for pile foundation detection, it can produce torsional excitation on pile foundation, thereby is convenient to detect the defective of pile foundation at the different depth place.
The present invention constitutes like this, it comprises a pair of cross bar that crosses on the pile foundation crossbeam of its rotation relatively and lock onto two symmetrical sides of pile foundation respectively, two symmetrical side-lowers of described crossbeam are respectively equipped with montant, wherein a side montant is positioned at the place ahead of homonymy cross bar, and the rear that the opposite side montant is positioned at the homonymy cross bar produces moment of torsion so that montant can promote a pair of cross bar simultaneously under the crossbeam of rotation drives.
During detection, the testing staff rotates crossbeam once, make a pair of montant at crossbeam two ends produce collision with a pair of cross bar simultaneously, can obtain the pure moment of torsion that reverses, thereby according to the shearing wave that reverses generation, can detect the defective of pile foundation body, particularly detect the shallow defects that the extensional vibration detection method can not be found.
Than prior art, torsional vibration exciter for pile foundation detection provided by the present invention, defective not only simple in structure, easy to operate, as to help to detect different depth place pile foundation simple and effectively, and popularization with low cost, economic and practical, easy, in addition, use this torsional vibration exciter for pile foundation detection can also accomplish without detriment to the integrality that detects pile foundation, thereby guarantee the quality of pile foundation base body, in today that present field of civil engineering extensively adopts pile foundation, can predict, this exciting apparatus will have broad application prospects, and will create the huge social economic benefit.
Description of drawings
Fig. 1 is the embodiment of the invention one organigram.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the local connection diagram of pipe and pile foundation top of embodiment one.
Fig. 4 is the embodiment of the invention two organigrams.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the I-I sectional view of Fig. 4.
Fig. 7 is the schematic diagram of one of them cuff among Fig. 4.
Fig. 8 is the schematic diagram of Fig. 4 light plate.
Label declaration: 1 pile foundation, 2 crossbeams, 3 cross bars, 4 montants, 5 bearings, 6 pipes, 61 threaded rods, 7 nuts, 8 expansion bolts, 9 bearings, 10 pipes, 11 steel plates, 12 expansion bolts, 13 cuffs, 14 bolts, 15 paddle-tumbles, 16 flange parts.
The specific embodiment
The embodiment of the invention is characterised in that: it comprises the crossbeam 2 that crosses at its rotation relatively on the pile foundation 1 and lock onto a pair of cross bar 3 of two symmetrical sides of pile foundation respectively, two symmetrical side-lowers of described crossbeam are respectively equipped with montant 4, wherein a side montant is positioned at the place ahead of homonymy cross bar, and the rear that the opposite side montant is positioned at the homonymy cross bar produces moment of torsion so that montant can promote a pair of cross bar simultaneously under the crossbeam of rotation drives.
Embodiment one is as shown in Figure 1-Figure 3: the bearing 5 of described crossbeam through being located at its bottom is connected with the pipe 6 of being located at the pile foundation top, crossbeam is separately fixed on the different race rings of bearing with pipe, and described pipe is connected by threaded rod 61, nut 7 that is fixed in the pipe bottom and the expansion bolt 8 of squeezing into the pile foundation top with the pile foundation top; A pair of cross bar 3 is individually fixed in the two opposite sides of pipe.
When a pair of montant collides simultaneously with cross bar under the crossbeam of rotation drives, produce moment of torsion at pipe itself, pass to the pile foundation top by threaded rod 61, nut 7 and expansion bolt 8, so just obtained the pure torsion at pile foundation top.The advantage of present embodiment is the restriction that is not subjected to the stake footpath, because cross bar is welded on the pipe, pipe is again to be connected with the pile foundation top by expansion bolt, mainly is to produce moment of torsion at pipe itself to pass to the pile foundation top, thereby is not subjected to the restriction in stake footpath.
Embodiment two is as Fig. 4-shown in Figure 8: as described in crossbeam be connected with the pipe 10 of being located at the pile foundation top by the bearing 9 of being located at its bottom, crossbeam is separately fixed on the different race rings of bearing with pipe, and the steel plate 11 that is fixed in the pipe bottom is connected by expansion bolt 12 with the pile foundation top; Be equipped with the bolt 14 of a pair of cuff that is interlocked 13, two cuffs on it is fastened and connected the position on the peripheral part of described pile foundation and be locked on the pile foundation, a pair of cross bar 3 is connected on the outside portion of a pair of cuff.
Described cuff middle part offers the paddle-tumble 15 that moves in order to cross bar within it, and the medial extremity of cross bar has flange part 16 greater than the paddle-tumble opening to be buckled on the medial surface of paddle-tumble, and when cuff was locked, cross bar can not move relative to cuff under the effect of cuff.
When a pair of montant collides simultaneously with cross bar, directly produce moment of torsion on one's body in pile foundation by being locked at pile foundation cross bar and cuff on one's body under the crossbeam of rotation drives.In the present embodiment, crossbeam is subjected to the restriction in stake footpath, when the stake footpath is big, requires crossbeam longer, the stake footpath hour, crossbeam can suitably shorten.
Claims (4)
1. torsional vibration exciter for pile foundation detection, it is characterized in that: it comprises a pair of cross bar (3) that crosses on the pile foundation (1) crossbeam of its rotation (2) relatively and lock onto two symmetrical sides of pile foundation respectively, two symmetrical side-lowers of described crossbeam are respectively equipped with montant (4), wherein a side montant is positioned at the place ahead of homonymy cross bar, and the rear that the opposite side montant is positioned at the homonymy cross bar produces moment of torsion so that montant can promote a pair of cross bar simultaneously under the crossbeam of rotation drives.
2. torsional vibration exciter for pile foundation detection according to claim 1, it is characterized in that: the bearing (5) of described crossbeam through being located at its bottom is connected with the pipe of being located at the pile foundation top (6), crossbeam is separately fixed on the different race rings of bearing with pipe, and described pipe is connected with the expansion bolt of squeezing into the pile foundation top (8) by threaded rod (61), the nut (7) that is fixed in the pipe bottom with the pile foundation top; A pair of cross bar (3) is individually fixed in the two opposite sides of pipe.
3. torsional vibration exciter for pile foundation detection according to claim 1, it is characterized in that: described crossbeam is connected with the pipe of being located at the pile foundation top (10) by the bearing (9) of being located at its bottom, crossbeam is separately fixed on the different race rings of bearing with pipe, and the steel plate (11) that is fixed in the pipe bottom is connected by expansion bolt (12) with the pile foundation top; Be equipped with a pair of cuff that is interlocked (13) on the peripheral part of described pile foundation, the bolt (14) of two cuffs on it is fastened and connected the position is locked on the pile foundation, and a pair of cross bar (3) is connected on the outside portion of a pair of cuff.
4. torsional vibration exciter for pile foundation detection according to claim 3, it is characterized in that: described cuff middle part offers the paddle-tumble (15) that moves in order to cross bar within it, the medial extremity of cross bar has greater than the flange part of paddle-tumble opening (16) to be buckled on the medial surface of paddle-tumble, when cuff was locked, cross bar can not move relative to cuff under the effect of cuff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100183243A CN100419170C (en) | 2006-01-27 | 2006-01-27 | Torsional vibration exciter for pile foundation detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100183243A CN100419170C (en) | 2006-01-27 | 2006-01-27 | Torsional vibration exciter for pile foundation detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807777A CN1807777A (en) | 2006-07-26 |
| CN100419170C true CN100419170C (en) | 2008-09-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100183243A Expired - Fee Related CN100419170C (en) | 2006-01-27 | 2006-01-27 | Torsional vibration exciter for pile foundation detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419170C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603380B (en) * | 2013-11-08 | 2015-09-02 | 国家电网公司 | Measure the ancillary test device of rigidity of gravel pile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030122434A1 (en) * | 2001-12-27 | 2003-07-03 | Mitsubishi Denki Kabushiki Kaisha | Dynamic loading system, dynamic loading method and dynamic loading test method for piles |
| CN2871659Y (en) * | 2006-01-27 | 2007-02-21 | 福州大学 | Screw torsional vibration exciter for inspecting pile foundation |
| CN2871658Y (en) * | 2006-01-27 | 2007-02-21 | 福州大学 | Hooped torsional vibration exciter for inspecting pile foundation |
-
2006
- 2006-01-27 CN CNB2006100183243A patent/CN100419170C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030122434A1 (en) * | 2001-12-27 | 2003-07-03 | Mitsubishi Denki Kabushiki Kaisha | Dynamic loading system, dynamic loading method and dynamic loading test method for piles |
| CN2871659Y (en) * | 2006-01-27 | 2007-02-21 | 福州大学 | Screw torsional vibration exciter for inspecting pile foundation |
| CN2871658Y (en) * | 2006-01-27 | 2007-02-21 | 福州大学 | Hooped torsional vibration exciter for inspecting pile foundation |
Non-Patent Citations (2)
| Title |
|---|
| 扭转波应用于低应变动力测桩的理论研究. 刘东甲，刘煜洲，王杰英.岩土工程学报，第25卷第3期. 2003 |
| 扭转波应用于低应变动力测桩的理论研究. 刘东甲，刘煜洲，王杰英.岩土工程学报，第25卷第3期. 2003 * |
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| Publication number | Publication date |
|---|---|
| CN1807777A (en) | 2006-07-26 |
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Granted publication date: 20080917 Termination date: 20110127 |