CN208280194U - The device of frictional resistance inside and outside a kind of detection steel-pipe pile - Google Patents
The device of frictional resistance inside and outside a kind of detection steel-pipe pile Download PDFInfo
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- CN208280194U CN208280194U CN201820557543.7U CN201820557543U CN208280194U CN 208280194 U CN208280194 U CN 208280194U CN 201820557543 U CN201820557543 U CN 201820557543U CN 208280194 U CN208280194 U CN 208280194U
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- steel
- pipe pile
- stake
- pipe
- frictional resistance
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Abstract
The utility model discloses a kind of devices of frictional resistance inside and outside detection steel-pipe pile, the device includes the outer steel pipe stake (1) nested together and interior steel-pipe pile (2), and its hanging is fixed on the lower surface of stake top backing plate (4) jointly, the bottom end of outer steel pipe stake (1) is stretched out in the bottom end of interior steel-pipe pile (2), the bottom end of outer steel-pipe pile (1) and interior steel-pipe pile (2) is provided with a underseal mouth (5), the stake underseal mouth (5) includes billet (6) and flexible gasket (7)；Foil gauge (3) are posted in the outer surface of outer steel-pipe pile (1) and the outer surface of interior steel-pipe pile (2)；Protective device (8) is fixed on the outer surface of outer steel pipe stake (1)；The device of frictional resistance is applied to inner frictional resistance and outer frictional resistance suffered by tubular pole in detection steel-pipe pile pile driving process inside and outside detection steel-pipe pile provided by the utility model, and the device have many advantages, such as device it is simple, it is swift to operate, using convenient, have wide application prospects in steel pipe column research.
Description
Technical field
The utility model relates to a kind of devices of frictional resistance inside and outside detection steel-pipe pile, belong to pile foundation application field.
Background technique
Steel-pipe pile is widely applied in engineering in recent years, native during the pile driving process since steel pipe pile bottom is open
Body pours in inside pile pipe, forms soil plug, increases the resistance of pile sinking.The pile drivability of soil plug black-out effect correctly judged to stake
And bearing capacity prediction has important influence, for this problem, lot of domestic and foreign scholar has carried out a large amount of research work.Soil
Plug is to be formed since the frictional resistance between tubular pole inner wall and core acts on, and design according to design formula, is to ignore soil
The inner frictional resistance of section and steel-pipe pile is filled in, it is relatively low necessarily to will cause bearing capacity of single pile calculated value, will often find that in Practical Project
The bearing capacity of single pile of test pile is greater than designing institute's specified value.At present, to soil plug section inner frictional resistance research not enough at
It is ripe, more accurate test method is needed further to study.
Summary of the invention
Technical problem: the purpose of this utility model is to provide a kind of device of frictional resistance inside and outside detection steel-pipe pile, the dresses
Outer frictional resistance and inner frictional resistance suffered by steel-pipe pile can accurately be measured respectively by setting, and promote grinding for steel-pipe pile soil plug section inner frictional resistance
Study carefully work.
Technical solution: the utility model provides a kind of device for detecting frictional resistance inside and outside steel-pipe pile, the steel-pipe pile
Including the outer steel pipe stake nested together and interior steel-pipe pile, and outer steel pipe stake and interior steel-pipe pile hanging are fixed on stake top jointly
The bottom end of outer steel pipe stake is stretched out in the lower surface of backing plate, the bottom end of interior steel-pipe pile, is arranged in the bottom end of outer steel-pipe pile and interior steel-pipe pile
There is a underseal mouth, the stake underseal mouth includes billet and flexible gasket, and billet is fixed on the bottom end of interior steel-pipe pile,
The gap location filling flexible gasket of billet and outer steel pipe stake bottom end；In the outer surface of outer steel-pipe pile and the appearance of interior steel-pipe pile
Post foil gauge in face；Foil gauge outer layer positioned at outer steel pipe stake outer surface is provided with protective device.
Wherein:
The outer steel pipe stake nested together and interior steel-pipe pile refer to outer steel pipe stake and interior steel-pipe pile it is concentrically nested
Together, and the sum of the outer diameter of interior steel-pipe pile (2) and foil gauge (3) thickness be less than outer steel pipe stake (1) internal diameter.
The stake top backing plate is doughnut-shaped steel plate, and outer diameter is not more than interior steel not less than outer diameter, its internal diameter of outer steel pipe stake
The internal diameter of tubular pole.
The outer steel pipe stake and interior steel-pipe pile hanging are fixed on the fixed form of the lower surface of stake top backing plate jointly
To be welded to connect, being bolted or rivet interlacement.
The billet is doughnut-shaped steel plate, and internal diameter is consistent with interior steel-pipe pile internal diameter, and outer diameter is between outer steel pipe stake
Internal diameter and outer diameter between.
The billet is fixed on the fixed form of the bottom end of interior steel-pipe pile to be welded to connect, being bolted or rivet
Connection.
It is described to post foil gauge, the specific arrangement of foil gauge in the outer surface of outer steel-pipe pile and the outer surface of interior steel-pipe pile
It is as follows: to have no less than two groups of foil gauges the outer surface of outer steel-pipe pile is axially disposed, every group of foil gauge includes no less than two
Foil gauge, circumferential direction are uniformly distributed on the outer surface of outer steel pipe stake；The outer surface of interior steel-pipe pile it is axially disposed have it is many
In two groups of foil gauges, every group of foil gauge includes that no less than two foil gauges, circumferential direction is uniformly distributed in the outer surface of interior steel-pipe pile
On.
The inside and outside frictional resistance of steel-pipe pile can be conversed according to the strain value of test, conversion method is strain value multiplied by bullet
Property modulus value obtains axle power, and the difference of two o'clock axle power can be obtained the list on corresponding unit area divided by the side surface area between two o'clock
Position frictional resistance.
The foil gauge outer layer positioned at outer steel pipe stake outer surface is provided with protective device, refers to that protective device is fixed on
In outer steel pipe stake, and cover the foil gauge on outer steel pipe stake outer surface.
The protective device is fixed on the fixed form in outer steel pipe stake to be welded to connect or being bonded.
The protective device is gusset or plastic plate.
The gap location filling flexible gasket in billet Yu outer steel pipe stake bottom end, the material of flexible gasket are silicon
Glue or rubber prevent the soil body in pile driving process from entering between interior steel-pipe pile and outer steel pipe stake, while guaranteeing the stake bottom of interior steel-pipe pile
It is flexible connection between the stake bottom of outer steel pipe stake, the two strain is not interfere with each other.
The device of frictional resistance is applied to detection steel-pipe pile pile sinking mistake inside and outside a kind of detection steel-pipe pile provided by the utility model
Inner frictional resistance suffered by tubular pole and outer frictional resistance in journey.
Wherein:
Inner frictional resistance and outer frictional resistance suffered by tubular pole in the detection steel-pipe pile pile driving process, outer steel pipe stake only outer wall
It is contacted with foundation soil, measuring frictional resistance is outer frictional resistance suffered by steel-pipe pile, and only inner wall connects interior steel-pipe pile with soil plug section foundation soil
Touching, measuring frictional resistance is inner frictional resistance suffered by steel-pipe pile.
Outer steel pipe stake surface strain piece is affixed on for testing the axial strain of outer steel pipe stake, is somebody's turn to do multiplied by elastic mould value
Point axle power, the difference of two o'clock axle power can calculate in steel-pipe pile pile driving process suffered outer divided by the side surface area between two o'clock
Frictional resistance；Interior steel-pipe pile surface strain piece is affixed on for testing the axial strain of interior steel-pipe pile, is somebody's turn to do multiplied by elastic mould value
Point axle power, the difference of two o'clock axle power can calculate in steel-pipe pile pile driving process suffered interior divided by the side surface area between two o'clock
Frictional resistance.
The utility model has the advantages that compared with prior art, the utility model has the advantage that
The means of existing steel pipe pile side friction test can only all measure outer frictional resistance and inner frictional resistance suffered by steel-pipe pile
Superposition, cannot distinguish between the size of inside and outside frictional resistance, the utility model proposes detection steel-pipe pile inside and outside frictional resistance device, it is real
Showed and clearly distinguished inner frictional resistance and outer frictional resistance suffered by steel-pipe pile, and have device it is simple, it is swift to operate, using facilitating
Advantage has a wide range of applications in the research work in terms of steel-pipe pile is filled in inner frictional resistance by soil.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device sectional view；
Fig. 2 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device in steel-pipe pile connection signal
Figure；
Fig. 3 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device China and foreign countries steel-pipe pile elevation；
Fig. 4 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device in interior steel-pipe pile elevation；
Fig. 5 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device in stake top backing plate solid signal
Figure；
Fig. 6 be the utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device in stake underseal mouth solid signal
Figure；
Have in figure: outer steel pipe stake 1, interior steel-pipe pile 2, foil gauge 3, stake top backing plate 4, stake underseal mouth 5, billet 6, flexibility are close
Packing 7, protective device 8, ground 9 and soil plug section 10.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
As shown in figures 1 to 6, it is a kind of detection steel-pipe pile inside and outside frictional resistance device, the steel-pipe pile include it is concentrically nested
Outer steel pipe stake 1 and interior steel-pipe pile 2 together, outer steel pipe stake 1 are mutually not in contact with each other with interior 2 side wall of steel-pipe pile, and outer steel pipe stake 1 and interior
2 hanging of steel-pipe pile is welded on the lower surface of stake top backing plate 4 jointly, it is ensured that does not occur between outer steel pipe stake 1 and interior steel-pipe pile 2
Horizontal relative displacement, the bottom end of outer steel pipe stake 1 is stretched out in the bottom end of interior steel-pipe pile 2, in the bottom end of outer steel-pipe pile 1 and interior steel-pipe pile 2
It is provided with a underseal mouth 5, the stake underseal mouth 5 includes billet 6 and flexible gasket 7, and billet 6 is welded in interior steel-pipe pile
2 bottom end, there are certain intervals between outer steel pipe stake 1 and billet 6, guarantee outer steel pipe stake 1 and the strain of interior steel-pipe pile 2 mutually not
Interference；Gap location filling flexible gasket 7 in billet 6 Yu 1 bottom end of outer steel pipe stake, when preventing pile sinking the soil body by gap into
Enter between outer steel pipe stake 1 and interior steel-pipe pile 2, the effect of billet 6 is that flexible gasket 7 is protected not to be damaged in pile sinking；
Foil gauge 3, and the outer diameter of interior steel-pipe pile 2 and foil gauge 3 are posted in the outer surface of outer steel-pipe pile 1 and the outer surface of interior steel-pipe pile 2
The sum of thickness is less than the internal diameter of outer steel pipe stake 1；Foil gauge 3 is answered for testing the axial direction of outer steel pipe stake 1 and interior steel-pipe pile 2 respectively
Become, the circumferential direction of foil gauge 3 and axial arrangement are adjusted according to requirement of experiment；3 outer layer of foil gauge positioned at 1 outer surface of outer steel pipe stake is solid
Surely it is provided with 8 gusset of protective device, the foil gauge 3 of 1 outer surface of outer steel pipe stake is protected not to be damaged in pile sinking.
Stake top backing plate 4 is doughnut-shaped steel plate, and outer diameter is not more than interior steel-pipe pile 2 not less than outer diameter, its internal diameter of outer steel pipe stake 1
Internal diameter.
Billet 6 is doughnut-shaped steel plate, and internal diameter is consistent with interior 2 internal diameter of steel-pipe pile, and outer diameter is between 1 internal diameter of outer steel pipe stake
Between outer diameter.
Flexible gasket 7 is filled between 1 bottom of billet 6 and outer steel pipe stake using flexible materials such as silica gel or rubber
Gap, prevent the soil body in pile driving process from entering between outer and inner tube stake, at the same guarantee outer and inner tube stake stake bottom for flexible connection,
The two strain is not interfere with each other.
The utility model proposes a kind of detection steel-pipe pile inside and outside frictional resistance device be applied to detection steel-pipe pile pile sinking mistake
Inner frictional resistance suffered by tubular pole and outer frictional resistance in journey, during the pile driving process, only outer wall is contacted with 9 soil of ground for outer steel pipe stake 1, is surveyed
Obtaining frictional resistance is outer frictional resistance suffered by steel-pipe pile, and only inner wall contacts interior steel-pipe pile 2 with soil plug section 10, and measuring frictional resistance is steel pipe
Inner frictional resistance suffered by stake.
1 surface strain piece 3 of outer steel pipe stake is affixed on for testing the axial strain of outer steel pipe stake 1, is worth multiplied by elasticity modulus
To the axle power, the difference of two o'clock axle power can calculate suffered in steel-pipe pile pile driving process divided by the side surface area between two o'clock
Outer frictional resistance；Interior 2 surface strain piece 3 of steel-pipe pile is affixed on for testing the axial strain of interior steel-pipe pile 2, multiplied by elastic mould value
The axle power is obtained, the difference of two o'clock axle power can calculate institute in steel-pipe pile pile driving process divided by the side surface area between two o'clock
The inner frictional resistance received.
It should be pointed out that for those skilled in the art, before not departing from the utility model principle
It puts, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the utility model.This reality
The available prior art of each component part being not known in example is applied to be realized.
Claims (10)
1. the device of frictional resistance inside and outside a kind of detection steel-pipe pile, it is characterised in that: the steel-pipe pile includes nesting together
Outer steel pipe stake (1) and interior steel-pipe pile (2), and outer steel pipe stake (1) and interior steel-pipe pile (2) hanging are fixed on stake top backing plate jointly
(4) lower surface, the bottom end of outer steel pipe stake (1) is stretched out in the bottom end of interior steel-pipe pile (2), in outer steel-pipe pile (1) and interior steel-pipe pile (2)
Bottom end be provided with a underseal mouth (5), the stake underseal mouth (5) includes billet (6) and flexible gasket (7), billet
(6) it is fixed on the bottom end of interior steel-pipe pile (2), the gap location filling flexible gasket in billet (6) and outer steel pipe stake (1) bottom end
(7)；Foil gauge (3) are posted in the outer surface of outer steel-pipe pile (1) and the outer surface of interior steel-pipe pile (2)；Positioned at outer steel pipe stake (1)
Foil gauge (3) outer layer of outer surface is provided with protective device (8).
2. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: described is nested in
Outer steel pipe stake (1) and interior steel-pipe pile (2) together refers to that outer steel pipe stake (1) and interior steel-pipe pile (2) are concentrically nested together and interior
The sum of outer diameter and foil gauge (3) thickness of steel-pipe pile (2) are less than the internal diameter of outer steel pipe stake (1).
3. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: the stake top pad
Plate (4) is doughnut-shaped steel plate, and outer diameter is not more than the internal diameter of interior steel-pipe pile (2) not less than outer diameter, its internal diameter of outer steel pipe stake (1).
4. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: the outer steel pipe
Stake (1) and interior steel-pipe pile (2) hanging be fixed on jointly stake top backing plate (4) lower surface fixed form be welded connecting,
It is bolted or rivet interlacement.
5. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: the billet
It (6) is doughnut-shaped steel plate, internal diameter is consistent with interior steel-pipe pile (2) internal diameter, internal diameter and outer diameter of the outer diameter between outer steel pipe stake (1)
Between.
6. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: the billet
(6) fixed form of the bottom end of interior steel-pipe pile (2) is fixed on to be welded to connect, being bolted or rivet interlacement.
7. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: described in outer steel pipe
The outer surface of stake (1) and the outer surface of interior steel-pipe pile (2) are posted foil gauge (3), and the specific arrangement of foil gauge (3) is as follows:
The outer surface of outer steel pipe stake (1) is axially disposed no less than two groups of foil gauges (3), and every group of foil gauge includes no less than two and answer
Become piece (3), circumferential direction is uniformly distributed on the outer surface of outer steel pipe stake (1)；It is axially disposed in the outer surface of interior steel-pipe pile (2)
There are no less than two groups of foil gauges (3), every group of foil gauge includes that no less than two foil gauges (3), circumferential direction is uniformly distributed in interior steel
On the outer surface of tubular pole (2).
8. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: described being located at is outer
Foil gauge (3) outer layer of steel-pipe pile (1) outer surface is provided with protective device (8), refers to that protective device (8) is fixed on outer steel pipe stake
(1) on, and the foil gauge (3) on outer steel pipe stake (1) outer surface is covered.
9. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as claimed in claim 8, it is characterised in that: the protection dress
The fixed form that (8) are fixed on outer steel pipe stake (1) is set to be welded to connect or being bonded.
10. the device of frictional resistance inside and outside a kind of detection steel-pipe pile as described in claim 1, it is characterised in that: the protection
Device (8) is gusset or plastic plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820557543.7U CN208280194U (en) | 2018-04-19 | 2018-04-19 | The device of frictional resistance inside and outside a kind of detection steel-pipe pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820557543.7U CN208280194U (en) | 2018-04-19 | 2018-04-19 | The device of frictional resistance inside and outside a kind of detection steel-pipe pile |
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| Publication Number | Publication Date |
|---|---|
| CN208280194U true CN208280194U (en) | 2018-12-25 |
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| CN201820557543.7U Expired - Fee Related CN208280194U (en) | 2018-04-19 | 2018-04-19 | The device of frictional resistance inside and outside a kind of detection steel-pipe pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532651A (en) * | 2018-04-19 | 2018-09-14 | 东南大学 | The device of frictional resistance inside and outside a kind of detection steel-pipe pile |
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2018
- 2018-04-19 CN CN201820557543.7U patent/CN208280194U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532651A (en) * | 2018-04-19 | 2018-09-14 | 东南大学 | The device of frictional resistance inside and outside a kind of detection steel-pipe pile |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 Termination date: 20210419 |