CN204356820U - For the free-falling hammer hammering device of Large strain method pile measurement - Google Patents
For the free-falling hammer hammering device of Large strain method pile measurement Download PDFInfo
- Publication number
- CN204356820U CN204356820U CN201420718969.8U CN201420718969U CN204356820U CN 204356820 U CN204356820 U CN 204356820U CN 201420718969 U CN201420718969 U CN 201420718969U CN 204356820 U CN204356820 U CN 204356820U
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- weight
- guide peg
- free
- large strain
- pile foundation
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a kind of free-falling hammer hammering device for Large strain method pile measurement, comprise weight, this device also comprises the guide peg being fixed on pile foundation top center place, described guide peg and pile foundation are coaxially arranged, described weight is provided with the centre bore with described guide peg adaptation, and described guide peg is inserted in the centre bore of described weight.The utility model is by adopting at stake top fixed guide pole, weight is provided with the centre bore with guide peg adaptation, and make guide peg insert the forced centering structure of weight centre bore, effectively can reduce hammer force in process of the test and occur the phenomenon that eccentric and weight unstability is fallen, prevent the danger that weight falls, ensure the accuracy detecting data, improve the precision of test.Effectively can solve the quality that weight eccentricity issues improves stimulus collection, simply, fast can complete test again, greatly can save testing cost.Be particularly suitable for the stake of a footpath at below 600mm.
Description
Technical field
The utility model relates to a kind of pile foundation Large strain method Dynamic testing equipment, particularly a kind of free-falling hammer hammering device for Large strain method pile measurement.
Background technology
In construction work, the accuracy that bearing capacity of pile foundation is measured directly has influence on the safety of superstructure.Large strain method Dynamic testing, as the important means determining bearing capacity of pile foundation, compared to traditional slow test, has quick, simple, economic dispatch advantage, more and more causes the attention of people.Large strain method Dynamic testing adopts the method on weight moment impact stake top to make pile body produce displacement, the sensor be arranged near stake top is simultaneously utilized to gather stress and speed curve over time, then through numerical computations, determining vertical bearing capacity of single pile and pile body integrity, is a kind of dynamic detection method.
In Large strain method process of the test, due to stake and weight contact area little, particularly diameter is less than the stake of 600mm, often there will be weight cannot with stake heart centering and cause the phenomenon of hammer force bias, the signal curve gathered is changed and distortion.Serious also may there is unstability after the bounce-back of weight Driven Piles top, fall from stake top and cause casualties and the phenomenon of property loss.
In traditional method of testing, adopt by workman in weight four direction stay cord and the method estimating centering, control effects is inaccurate, often occurs eccentric phenomenon; Adopt the method for leading truck effectively can solve eccentric problem, but leading truck one is heavier, shift position speed is slower; If two is that the planarization of ground and bearing capacity are poor, the phenomenon of leading truck differential settlement, inclination in process of the test may be there is, there is potential safety hazard.Therefore be badly in need of a kind of quality that effectively can solve weight eccentricity issues raising stimulus and gather, the device of test can be completed again simply, fast.
Summary of the invention
The utility model provides a kind of free-falling hammer hammering device for Large strain method pile measurement for solving in known technology the technical problem that exists, this device can force weight and stake top centering, effectively can solve weight eccentricity issues and can avoid again security incident occurs.
The technical scheme that the utility model is taked for the technical problem existed in solution known technology is: a kind of free-falling hammer hammering device for Large strain method pile measurement, comprise weight, this device also comprises the guide peg being fixed on pile foundation top center place, described guide peg and pile foundation are coaxially arranged, described weight is provided with the centre bore with described guide peg adaptation, and described guide peg is inserted in the centre bore of described weight.
Scale is provided with on the top of described guide peg.
The bottom of described guide peg is inserted in spacing hole, and the two is threaded connection, and described spacing hole is arranged on pile foundation inner top center, and described spacing hole and pile foundation are coaxially arranged.
Described spacing hole is formed by the metal sleeve being embedded in pile foundation inner top center.
This device also comprises the metal casing being arranged on pile foundation top periphery, and described metal casing and pile foundation are coaxially arranged.
Described guide peg upper end is provided with handle hole.
The end face of described weight is provided with suspension ring.
Described weight adopts cube structure.
The external diameter of described metal casing is identical with the diameter of described pile foundation, and the length of described metal casing is 2 times of the diameter of described pile foundation, and must not be less than 1m.
The length of described metal sleeve is 500mm.
The advantage that the utility model has and good effect are: by adopting at stake top fixed guide pole, weight is provided with the centre bore with guide peg adaptation, and make guide peg insert the forced centering structure of weight centre bore, effectively can reduce hammer force in process of the test and occur the phenomenon that eccentric and weight unstability is fallen, prevent the danger that weight falls, ensure the accuracy detecting data, improve the precision of test.By adopting the structure arranging scale on the guide bar, the sling height of weight can be controlled fast and accurately.The utility model is simple and light, can complete assembling and test rapidly; Do not need the space of installing traditional direction device, do not need to carry out hardening of ground process, there is no potential safety hazard, effectively can solve the quality that weight eccentricity issues improves stimulus collection, simply, fast can complete test again, greatly can save testing cost.Be particularly suitable for the stake of a footpath at below 600mm.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is metal sleeve structural representation of the present utility model;
Fig. 3 is guide peg structural representation of the present utility model.
In figure: 1, metal casing, 2, metal sleeve, 3, guide peg, 4, handle hole, 5, weight, 6, suspension ring, 7, pile foundation, 8, scale.
Detailed description of the invention
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 ~ Fig. 3, a kind of free-falling hammer hammering device for Large strain method pile measurement, comprise weight 5 and the guide peg 3 being fixed on pile foundation 7 top center place, described guide peg 3 is coaxially arranged with pile foundation 7, described weight 5 is provided with the centre bore with described guide peg 3 adaptation, and described guide peg 3 is inserted in the centre bore of described weight 5.
In the present embodiment, for the ease of controlling the sling height of plane set-hammer in process of the test, be provided with scale 8 on the top of described guide peg 3.Guide peg length is determined according to the sling height calculated.
The fixed structure of described guide peg 3 is: the bottom of described guide peg 3 is inserted in spacing hole, and the two is threaded connection, and facilitates the fixing of guide peg.Described spacing hole is arranged on pile foundation inner top center, and described spacing hole and pile foundation 7 are coaxially arranged.The concrete generation type of spacing hole can be: 1) formed by the metal sleeve 2 being embedded in pile foundation 7 inner top center, as depicted in figs. 1 and 2.2) when pile foundation is prefabricated solid pile, the method for boring can be adopted to be formed, in the hole that stake top centre drill one is identical with the metal sleeve size degree of depth; 3) if pile foundation is hollow pile, need stake top portion concrete casting real, metal sleeve is embedded in center, stake top.
In order to protect pile crown, avoid it to ftracture, above-mentioned hammering device can also comprise the metal casing 1 being arranged on pile foundation 7 top periphery, and described metal casing 1 is coaxially arranged with pile foundation 7.Described metal casing can not be arranged when preformed pile.
Described guide peg 3 can adopt cylindrical base solid bar, is provided with handle hole 4 in the upper end of described guide peg 3.Be convenient to transport and install; The end face of described weight is provided with suspension ring 6.Be convenient to lifting.
In the present embodiment, described weight 5 adopts cube structure.The external diameter of described metal casing 1 is identical with the diameter of described pile foundation 7, and the length of described metal casing 1 is 2 times of the diameter of described pile foundation 7, and must not be less than 1m.The length of described metal sleeve 1 is 500mm.
Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, can also make a lot of form, these all belong within protection domain of the present utility model.
Claims (10)
1. the free-falling hammer hammering device for Large strain method pile measurement, comprise weight, it is characterized in that, this device also comprises the guide peg being fixed on pile foundation top center place, described guide peg and pile foundation are coaxially arranged, described weight is provided with the centre bore with described guide peg adaptation, and described guide peg is inserted in the centre bore of described weight.
2., according to claim 1 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, be provided with scale on the top of described guide peg.
3. according to claim 1 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, the bottom of described guide peg is inserted in spacing hole, and the two is threaded connection, described spacing hole is arranged on pile foundation inner top center, and described spacing hole and pile foundation are coaxially arranged.
4. according to claim 3 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, described spacing hole is formed by the metal sleeve being embedded in pile foundation inner top center.
5. according to claim 1 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, this device also comprises the metal casing being arranged on pile foundation top periphery, and described metal casing and pile foundation are coaxially arranged.
6. according to claim 1 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, described guide peg upper end is provided with handle hole.
7., according to claim 1 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, the end face of described weight is provided with suspension ring.
8. according to claim 7 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, described weight adopts cube structure.
9. according to claim 5 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, the external diameter of described metal casing is identical with the diameter of described pile foundation, and the length of described metal casing is 2 times of the diameter of described pile foundation, and must not be less than 1m.
10. according to claim 4 for the free-falling hammer hammering device of Large strain method pile measurement, it is characterized in that, the length of described metal sleeve is 500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420718969.8U CN204356820U (en) | 2014-11-25 | 2014-11-25 | For the free-falling hammer hammering device of Large strain method pile measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420718969.8U CN204356820U (en) | 2014-11-25 | 2014-11-25 | For the free-falling hammer hammering device of Large strain method pile measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204356820U true CN204356820U (en) | 2015-05-27 |
Family
ID=53258299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420718969.8U Expired - Fee Related CN204356820U (en) | 2014-11-25 | 2014-11-25 | For the free-falling hammer hammering device of Large strain method pile measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204356820U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544623A (en) * | 2016-01-29 | 2016-05-04 | 湖南省计量检测研究院 | Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile |
| CN106001351A (en) * | 2016-06-03 | 2016-10-12 | 太仓市顺昌锻造有限公司 | Forging hammer |
| CN114577644A (en) * | 2022-05-05 | 2022-06-03 | 交通运输部天津水运工程科学研究所 | Auxiliary device and method for ensuring model pile injection verticality and angle |
-
2014
- 2014-11-25 CN CN201420718969.8U patent/CN204356820U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544623A (en) * | 2016-01-29 | 2016-05-04 | 湖南省计量检测研究院 | Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile |
| CN106001351A (en) * | 2016-06-03 | 2016-10-12 | 太仓市顺昌锻造有限公司 | Forging hammer |
| CN114577644A (en) * | 2022-05-05 | 2022-06-03 | 交通运输部天津水运工程科学研究所 | Auxiliary device and method for ensuring model pile injection verticality and angle |
| CN114577644B (en) * | 2022-05-05 | 2022-07-12 | 交通运输部天津水运工程科学研究所 | Auxiliary device and method for ensuring model pile injection verticality and angle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20161125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |