CN206573528U - Low-strain foundation pile test is with quantitatively exciting hammer - Google Patents
Low-strain foundation pile test is with quantitatively exciting hammer Download PDFInfo
- Publication number
- CN206573528U CN206573528U CN201720326508.XU CN201720326508U CN206573528U CN 206573528 U CN206573528 U CN 206573528U CN 201720326508 U CN201720326508 U CN 201720326508U CN 206573528 U CN206573528 U CN 206573528U
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- housing
- hammer
- elastic
- guide rod
- low
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Abstract
The utility model discloses low-strain foundation pile test with quantitatively exciting hammer, elastic hammer, guide rod and spring including housing and in housing, guide rod is fixed and is erected in housing, elastic hammer central movable is installed on guide rod, the elastic stem bottom of elastic hammer is interspersed in the perforate that housing bottom is opened up, and spring is arranged between elastic hammer roof and housing top wall, and housing side opens up chute, cylinder lever connecting rod on elastic hammer, pull bar end, which is located in chute, to be stretched out outside housing.The utility model stimulating frequency is single, energy estimate methods are constant, for low-strain foundation pile test, reduces the interference of ripple, lifts the accuracy judged.
Description
Technical field
The utility model is related to pile measurement field of tool, and in particular to low-strain foundation pile test is swashed with hammer is quantitatively excited
Send out potential energy to quantify, stimulating frequency is quantitative.
Background technology
Pile foundation is a kind of technique of underground pile, occurs that fracture, reducing and expansion neck, concrete disintegration etc. lack unavoidably
Fall into.These defects can influence the quality of pile foundation to some extent, so that pile foundation does not reach design requirement.So detection of pier foundation is just
As problem of concern, wherein low strain reflected wave method is a kind of method for detecting that pile body integrity is most widely used.It is low to answer
Become reflective wave method, pile body was encouraged before this（Stake top is tapped with hand hammer）Elastic wave is produced, then is received by velocity sensor（By initial
Signal and pile defect or stake bottom）The reflected signal of generation, makes time-histories（Or waveform）Curve, then utilizes signal sampler
The waveform of record is handled and analyzed, finally with reference to geologic information and construction note, the integrality to pile body is judged.
The hand hammer specifications and models that testing staff uses in test differ, and it is different to tap gimmick, thus driving frequency differs, energy difference compared with
Greatly, thus cause elastic wave frequency width wider, the ripple of different frequency is interfered, and have impact on the accuracy of judgement.Sometimes, by broken pile
Exposed reinforcing bar limitation, the manual hammering method operating space of prior art is narrow and small, operation inconvenience.Moreover, the hand of prior art
The positioning accuracy of the hammer point position of dynamic hammering is relatively low.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of low-strain foundation pile test with hammer is quantitatively excited, and excites frequency
Rate is single, energy estimate methods are constant, for low-strain foundation pile test, reduces the interference of ripple, lifts the accuracy judged.
The utility model is achieved through the following technical solutions：
Low-strain foundation pile is tested with hammer, including housing and elastic hammer, guide rod and spring in housing is quantitatively excited, and is led
Bar is fixed and is erected in housing, and elastic hammer central movable is installed on guide rod, and the elastic stem bottom of elastic hammer is interspersed in housing bottom
Hold in the perforate opened up, spring is arranged between elastic hammer roof and housing top wall, and housing side is opened up to be connected on chute, elastic hammer
Pull bar is connect, pull bar end, which is located in chute, to be stretched out outside housing.
The further improvement project of the utility model is that the guide rod top is fixed in housing top wall, and bottom is overhang in shell
Above the perforate of body bottom.
The utility model further improvement project is that the chute avris is provided with graduated scale.It is easy to apply energy every time
Unified impact force.
The utility model compared with prior art, with following obvious advantage：
The utility model is vertically resisted against at the top of pile foundation, pull bar is pulled upwardly, elastic hammer is moved up along guide rod, to predetermined graduated
Highly, releasing lever, under the action of the spring, downward resilience taps pile foundation to elastic hammer, produced because angle, gesture amount are consistent
Wave frequency rate is single, potential energy is fixed, be conducive to improving the accuracy that test judges.Operate simultaneously flexibly, it is relative by space constraints
It is small；It can be hammered in specified location so that the criterion for once hammering detection is more accurate.
Brief description of the drawings
Fig. 1 is the utility model structure sectional view.
Embodiment
As shown in figure 1, the utility model includes housing 1 and elastic hammer 2, guide rod 3 and spring 4 in housing, housing
The perforate 11 that bottom is opened up, guide rod 3 is fixed and is erected in housing 1, i.e., the top of guide rod 3 is fixed on the roof of housing 1, and bottom is overhang
In the top of housing bottom perforate 11, the central movable of elastic hammer 2 is installed on guide rod 3, and the bottom of elastic stem 21 of elastic hammer is interspersed in
In the perforate 11 of housing bottom, spring 4 is arranged between the roof of elastic hammer 2 and the roof of housing 1, and the side of housing 1 opens up chute 12,
Cylinder lever connecting rod 22 on elastic hammer 2, the end of pull bar 22, which is located in chute 12, to be stretched out outside housing, and the avris of chute 12 is provided with scale
Chi.
Application method, will excite hammer is vertical to be resisted against at the top of pile foundation, is pulled upwardly pull bar, elastic hammer is moved up along guide rod, extremely
Predetermined graduated height, releasing lever, under the action of the spring, downward resilience taps pile foundation to elastic hammer.
Reach that what default scale release elastic hammer obtained excites potential energy（E）For：
Wherein：ETo excite potential energy；KFor spring（4）The coefficient of stiffiness, is demarcated by production unit；x, can be by side to preset scale
Face graduated scale is directly read.
Reach the stimulating frequency that default scale release elastic hammer is obtained（f）For：
Wherein：fFor stimulating frequency；KFor spring（4）The coefficient of stiffiness, is demarcated by production unit；mFor elastic hammer（2）Matter
Amount, is demarcated by production unit.
Claims (3)
1. low-strain foundation pile test is with quantitatively exciting hammer, it is characterised in that：Including housing（1）And the elastic hammer in housing
（2）, guide rod（3）And spring（4）, guide rod（3）Fixation is erected in housing（1）In, elastic hammer（2）Central movable is installed on guide rod
（3）On, the elastic stem of elastic hammer（21）Bottom is interspersed in the perforate that housing bottom is opened up（11）It is interior, spring（4）Installed in attack
Hammer（2）Roof and housing（1）Between roof, housing（1）Side opens up chute（12）, elastic hammer（2）Upper cylinder lever connecting rod（22）, draw
Bar（22）End is located at chute（12）Outside interior stretching housing.
2. low-strain foundation pile according to claim 1 test is with quantitatively exciting hammer, it is characterised in that：The guide rod（3）Top
End is fixed on housing（1）On roof, bottom is overhang in the perforate of housing bottom（11）Top.
3. low-strain foundation pile according to claim 1 test is with quantitatively exciting hammer, it is characterised in that：The chute（12）Side
Side is provided with graduated scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326508.XU CN206573528U (en) | 2017-03-30 | 2017-03-30 | Low-strain foundation pile test is with quantitatively exciting hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326508.XU CN206573528U (en) | 2017-03-30 | 2017-03-30 | Low-strain foundation pile test is with quantitatively exciting hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206573528U true CN206573528U (en) | 2017-10-20 |
Family
ID=60053238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720326508.XU Expired - Fee Related CN206573528U (en) | 2017-03-30 | 2017-03-30 | Low-strain foundation pile test is with quantitatively exciting hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206573528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456122A (en) * | 2020-04-16 | 2020-07-28 | 成都农业科技职业学院 | Bridge pile foundation low-strain detection system and detection method |
-
2017
- 2017-03-30 CN CN201720326508.XU patent/CN206573528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456122A (en) * | 2020-04-16 | 2020-07-28 | 成都农业科技职业学院 | Bridge pile foundation low-strain detection system and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20190330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |