CN105178290B - Steel tube pile with blast expanding device - Google Patents
Steel tube pile with blast expanding device Download PDFInfo
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- CN105178290B CN105178290B CN201510497328.3A CN201510497328A CN105178290B CN 105178290 B CN105178290 B CN 105178290B CN 201510497328 A CN201510497328 A CN 201510497328A CN 105178290 B CN105178290 B CN 105178290B
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- quick
- steel
- explosive expansion
- explosive
- swollen cylinder
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Abstract
The invention relates to steel tube piles applied to foundation piles, in particular to a steel tube pile with a blast expanding device. The steel tube pile comprises a main steel tube 1, a blast expanding cylinder 2 and a front cone 3. The main steel tube 1 is connected to the blast expanding cylinder 2 through a steel pin 13. The front cone 3 is mounted to the blast expanding cylinder 2 through four screws or a threaded structure. The blast expanding device is located in the blast expanding cylinder 2 and mainly comprises a bottom lamination structure and an upper lamination structure, wherein the bottom lamination structure is composed of a double-layer structure or a multi-layer structure; the upper lamination structure is composed of a double-layer structure or a multi-layer structure. A blasting system is composed of blast expanding materials (explosives), a blast expanding bin, a detonating cord and a blasting machine. Since the blast expanding device is mounted or connected into the steel tube pile and a lantern-shaped local expanding part is formed through blast expanding, the anti-pressing, anti-pulling and anti-lateral comprehensive bearing capacity of the pile is effectively improved.
Description
Technical field
The present invention relates to construction project field, specially a kind of steel-pipe pile for being applied to ground operation, by steel-pipe pile
Middle installation couples explosive expansion device, and the local for forming a lantern-shaped by explosive expansion expands part to effectively improve the anti-of stake
Pressure, resistance to plucking anti-side to and comprehensive load capacity.
Background technology
At present, foundation pile plays a role mainly by pile side resistance and end resistance in traditional mode；When there is building
Load is especially big, needs the larger bearing capacity of stake offer or in the similar engineering such as side slope consolidation projects and ocean engineering, right
When breakout capacity requires very high, also it is difficult to reach high-bearing capacity only by the method for changing stake size and high withdrawal resistance need to
Ask.Therefore need to redesign a kind of new steel-pipe pile to solve the above problems.
The content of the invention
The present invention is to solve when the bearing capacity or breakout capacity to steel-pipe pile requires very high, ordinary skill steel-pipe pile
Only it is difficult to reach high-bearing capacity and high withdrawal resistance demand by changing size, there is provided a kind of new steel pipe with explosive expansion device
Stake.
The present invention adopts the following technical scheme that realization：
A kind of steel-pipe pile with explosive expansion device, as shown in figure 1, including quick-fried swollen cylinder, the top connection master of the quick-fried swollen cylinder
Steel pipe, its bottom connection precentrum.
As shown in figure 1, the quick-fried swollen cylinder inner bottom part and top are fixedly installed respectively laminated construction, lamination knot in quick-fried swollen cylinder
Explosive expansion warehouse is installed, around cavity is formed, the cavity is formed the outer surface of the explosive expansion warehouse with quick-fried swollen cylinder inwall between structure
Cross section closing explosive expansion storehouse in a ring, in the explosive expansion storehouse explosive is provided with；Axle is offered at the axis of the explosive expansion warehouse
Xiang Kong, the axial hole bottom is with some radial holes being opened in the middle part of explosive expansion warehouse while UNICOM；Install in the axial hole
There is exploding wire, the exploding wire is placed through the laminated construction at the top of quick-fried swollen cylinder and is connected with trigger.
When explosive explosive expansion, it can produce very big pressure.By the type of the selected explosive of control, weight and shape,
The integrality of quick-fried swollen cylinder can be kept（It is quick-fried and break and control expand shape）.As shown in figure 3, forming a lantern by explosive expansion
The local of shape expand part effectively improve resistance to compression, resistance to plucking and the anti-side of stake to comprehensive load capacity.
After explosive explosive expansion, in general, to avoid the steel pin for connecting main steel pipe and quick-fried swollen cylinder from suffering damage.And precentrum
It is impaired.Main steel pipe, quick-fried swollen cylinder and precentrum need to adopt to be had higher stake yield strength, ultimate strength, is particularly high ductility
Material, can generally adopt structural steel, stainless steel, copper or copper alloy, aluminum or aluminum alloy.In order to be able to bear huge pressure, no
The size and tube wall for requiring nothing more than quick-fried swollen cylinder should be greater than critical thickness, and laminated construction must also have and substantially reduce shock strength
Ability.
When shock wave is constituted through interconnected materials by visibly different acoustic impedance or by fibre reinforced composites
During laminated construction, it will disperse quickly.Dispersion, the ability for slackening shock wave depend primarily on the phase of acoustic impedance between materials at two layers
The opposite sex.In order to prevent steel pin and precentrum undermined, it is provided with bottom laminated construction and top laminate structure to weaken shock wave
Impact to other parts pile body and coupling part.Shock wave will be decayed rapidly during by laminated construction.When logical
The pressure of previous Shockwave will greatly reduce when crossing laminated construction.High pressure explosive expansion gas will be discharged by radial hole and axial hole
Come.Some laminated materials for being welded to quick-fried swollen cylinder inwall will be partially separated under the immense pressure of explosive, but still some
To be intact.So in this way, the integrality of polycrystalline substance still can retain, and steel pin will not be damaged
Or it is broken.
In the presence of explosive, quick-fried swollen cylinder will be expanded rapidly outwardly.The high pressure of quick-fried swollen cylinder periphery makes the soil pressure outside pipe contract,
Substantially increase the packing and intensity of soil.In turn, the soil pressure that pipe appearance is subject to also will be greatly improved.In high strain-rate
（>103/s）In the case of, the yield stress of quick-fried swollen bobbin body material will further be increased.Judging explosive and quick-fried swollen
During the interaction of cylinder, it is necessary to take into account this factor.In addition, temperature is also a factor for needing to consider.
When shock wave travels to soil from quick-fried swollen cylinder, shock wave will reflect, incide in soil.According to shock theory thing
Reason, back wave is a kind of rare ripple, and incidence wave is a kind of compressional wave, increases can soil density, so as to intensity increase.
Beneficial effects of the present invention are as follows：
In traditional mode, foundation pile affords the effect of frictional force, and frictional force is P*m, and wherein P is the malleation of soil
Power, m are soil and pile body surface coefficient of friction.However, using in above-mentioned pattern, what foundation pile was born does not only have frictional force,
There is the normal pressure for being far longer than frictional force.In fact in the present invention, even if frictional force is also greater than traditional mode, because surrounding
Squeeze pressure P of the soil body in explosive expansion is bigger than in traditional mode, therefore, steel-pipe pile can bear bigger load.So of the invention
There is significant advantage.Under identical bearing capacity, it is possible to use smaller size of pipe, and same support effect is reached, can be big
It is big to reduce construction costs, with larger promotional value.
Description of the drawings
Fig. 1 represents steel-pipe pile generalized section before explosive expansion.
Fig. 2 represents the A-A sectional views of Fig. 1.
Fig. 3 represents steel-pipe pile generalized section after explosive expansion.
In figure, the main steel pipes of 1-, the quick-fried swollen cylinders of 2-, 3- precentrums, 4- laminated construction, 5- explosive expansion warehouses, 6- explosive expansions storehouse, 7- fries
Medicine, 8- axial holes, 9- radial holes, 10- exploding wires, 11- initiators, 12- reinforcing rings, 13- steel pins, 14- bolts, 15- screws.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
A kind of steel-pipe pile with explosive expansion device, is made up of main steel pipe 1, quick-fried swollen cylinder 2 with precentrum 3.Main steel pipe 1 passes through one
Individual steel pin 13 is connected to the top of quick-fried swollen cylinder 2.Precentrum 3 is to be installed to quick-fried swollen cylinder 2 by four screws or helicitic texture
Bottom.Explosive expansion device is installed in quick-fried swollen cylinder 2, is mainly included：One bottom laminated construction, by one group of double-deck or sandwich construction group
Into；One top set structure, is made up of one group of bilayer or sandwich construction.One blasting system, by explosive expansion thing（Explosive 7）、
Explosive expansion warehouse 5, exploding wire 10, initiator 11 are constituted.
Concrete structure in quick-fried swollen cylinder is as follows：
As shown in figure 1, the quick-fried inner bottom part of swollen cylinder 2 and top are fixedly installed respectively laminated construction 4, laminated construction can be by two
Layering or sandwich construction composition, but must be at what two kinds of different materials made.For the laminated construction of a double layerings,
The acoustic impedance of wherein layer of material have to be lower than another layer material.The definition of acoustic impedance is that Cr, wherein C and r represent respectively sound
The speed of sound and the density of material.And for the laminated construction of multilayer, the acoustic impedance of layers of material also must be inequality.Each layer
Material can be using metal or nonmetallic materials（Fibre reinforced composites）.Upper and lower laminated construction may have identical
The number of plies and same layer material, it is also possible to different layer number and layer material.This depends entirely on individual actual conditions.It is located at
First layer material of the laminated material in quick-fried swollen cylinder must be welded onto on quick-fried swollen cylinder, make the structure more powerful with this,
Steel pin is allowed from infringement.But the laminated construction of bottom need not be welded to quick-fried swollen cylinder in quick-fried swollen cylinder, but be installed using bolt
To on explosive expansion warehouse.
As shown in figure 1, explosive expansion warehouse 5, the outer surface of the explosive expansion warehouse 5 are provided with quick-fried swollen cylinder 2 between laminated construction 4
Around cavity is formed, the cavity forms cross section closing explosive expansion storehouse 6 in a ring with the quick-fried inwall of swollen cylinder 2, peace in the explosive expansion storehouse 6
Equipped with explosive 7, explosive 7 can also be replaced by solid propellant.The effect in explosive expansion storehouse is constraint explosive expansion, by changing shape, length
Degree, diameter, can be with the pipe shape of formation after controlled blasting, so that it can bear peak power.Generally, after explosive expansion, quick-fried swollen cylinder
Overall diameter will be enlarged by as original minimum twice.The area of its section also will be increased to few 4 times.
As shown in Figure 1, 2, offer axial hole 8 at the axis of the explosive expansion warehouse 5, the bottom of the axial hole 8 with open up
Some radial holes 9 in the middle part of explosive expansion warehouse 5 are while UNICOM；Exploding wire 10, the exploding wire 10 are installed in the axial hole 8
The laminated construction 4 for being placed through the top of quick-fried swollen cylinder 2 is connected with initiator 11, initiator must with exploding wire 10 be closely contacted with
Just can successfully ignite.Initiator is explosive initiation point.Explosive expansion ripple is propagated along an axial hole 8 and some radial holes 9.This
A little radial holes（At least 8 holes）It is evenly distributed on the same cross section of explosive expansion warehouse 5, by radial hole, explosive expansion ripple can be smooth
Ground, equably propagate in explosive expansion storehouse 6 and ignite and expand medicine 7.
As shown in figure 1, outer being located above and below explosive expansion storehouse 6 of the quick-fried swollen cylinder 2 is installed with respectively reinforcing ring 12, use
To reduce the unnecessary expansion of pile pipe, reinforcing ring 12 is using metal material or fibre reinforced composites.
As shown in figure 3, the local for forming a lantern-shaped by explosive expansion expands part to effectively improve the resistance to compression of stake, resist
Pull out with anti-side to comprehensive load capacity.
It is any technical scheme to be modified or equivalent, without departure from technical scheme
Spirit and scope, it all should cover in the claims of the present invention.
Claims (10)
1. a kind of steel-pipe pile with explosive expansion device, including quick-fried swollen cylinder（2）, the quick-fried swollen cylinder（2）Top connect main steel pipe
（1）, its bottom connection precentrum（3）；
It is characterized in that：The quick-fried swollen cylinder（2）Inner bottom part and top are fixedly installed respectively laminated construction（4）, quick-fried swollen cylinder（2）It is interior
Laminated construction（4）Between explosive expansion warehouse is installed（5）, the explosive expansion warehouse（5）Outer surface around forming cavity, the cavity with
Quick-fried swollen cylinder（2）Inwall forms cross section closing explosive expansion storehouse in a ring（6）, the explosive expansion storehouse（6）Explosive is inside installed（7）；Institute
State explosive expansion warehouse（5）Axis at offer axial hole（8）, the axial hole（8）Bottom be opened in explosive expansion warehouse（5）Middle part
Some radial holes（9）While UNICOM；The axial hole（8）Exploding wire is inside installed（10）, the exploding wire（10）Through position
In quick-fried swollen cylinder（2）The laminated construction at top（4）With initiator（11）Connection.
2. the steel-pipe pile with explosive expansion device according to claim 1, it is characterised in that：The quick-fried swollen cylinder（2）It is located at outward
Explosive expansion storehouse（6）Above and below be installed with reinforcing ring respectively（12）.
3. the steel-pipe pile with explosive expansion device according to claim 1 and 2, it is characterised in that：The laminated construction（4）By
Two layerings or sandwich construction composition, the acoustic impedance of layers of material is inequality.
4. the steel-pipe pile with explosive expansion device according to claim 3, it is characterised in that：The laminated construction（4）It is each
Layer material is using metal material or fibre reinforced composites.
5. the steel-pipe pile with explosive expansion device according to claim 4, it is characterised in that：Positioned at quick-fried swollen cylinder（2）Inner top
Laminated construction（4）Ground floor and quick-fried swollen cylinder（2）Welding；Positioned at quick-fried swollen cylinder（2）The laminated construction of inner bottom part（4）By bolt
（14）With explosive expansion warehouse（5）Connection.
6. the steel-pipe pile with explosive expansion device according to claim 1, it is characterised in that：The main steel pipe（1）It is swollen with quick-fried
Cylinder（2）By steel pin（13）Connection；The quick-fried swollen cylinder（2）And precentrum（3）By screw（15）Or helicitic texture connection.
7. the steel-pipe pile with explosive expansion device according to claim 6, it is characterised in that：The main steel pipe（1）, quick-fried swollen cylinder
（2）And precentrum（3）Made using structural steel, stainless steel, copper or copper alloy or aluminum or aluminum alloy.
8. the steel-pipe pile with explosive expansion device according to claim 7, it is characterised in that：The radial hole（9）Uniform position
In same cross section, quantity at least 8.
9. the steel-pipe pile with explosive expansion device according to claim 8, it is characterised in that：The explosive（7）Pushed away by solid
Enter agent replacement.
10. the steel-pipe pile with explosive expansion device according to claim 2, it is characterised in that：The reinforcing ring（12）Using
Metal material or fibre reinforced composites.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510497328.3A CN105178290B (en) | 2015-08-14 | 2015-08-14 | Steel tube pile with blast expanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510497328.3A CN105178290B (en) | 2015-08-14 | 2015-08-14 | Steel tube pile with blast expanding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105178290A CN105178290A (en) | 2015-12-23 |
| CN105178290B true CN105178290B (en) | 2017-05-10 |
Family
ID=54900680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510497328.3A Expired - Fee Related CN105178290B (en) | 2015-08-14 | 2015-08-14 | Steel tube pile with blast expanding device |
Country Status (1)
| Country | Link |
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| CN (1) | CN105178290B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120720B (en) * | 2016-07-02 | 2018-02-13 | 南通大学 | A kind of construction foundation working equipment and construction method |
| CN106013096B (en) * | 2016-07-02 | 2017-11-10 | 南通长城建设集团有限公司 | A kind of construction foundation working method |
| CN107356487B (en) * | 2017-08-22 | 2023-05-02 | 中国工程物理研究院化工材料研究所 | High overload loading device based on stress wave multiple reflection under action of high explosive |
| CN114319331B (en) * | 2022-03-08 | 2022-06-21 | 中国长江三峡集团有限公司 | Construction method of underwater pipe pile type foundation and underwater pipe pile type foundation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001348867A (en) * | 2001-04-13 | 2001-12-21 | Nkk Corp | Screwed type steel pipe and its work execution method |
| CN101126237A (en) * | 2007-09-29 | 2008-02-20 | 周亚萍 | Blasting pile-forming method for three-stage bottom-enlarging prefabricated and cast-in-situ steel concrete combination pile body |
| CN101235639A (en) * | 2008-02-18 | 2008-08-06 | 翟宇思 | Exploding expanding device for concrete filling pore bottom exploding expanding pile and pile forming method |
| CN101942831A (en) * | 2010-09-16 | 2011-01-12 | 关洪军 | Method for blasting and enlarging jet grouting pile |
| CN102031775A (en) * | 2010-06-12 | 2011-04-27 | 中铁十六局集团有限公司 | Construction technology of drilled pile in hard oblique rocks by medium hole blasting |
-
2015
- 2015-08-14 CN CN201510497328.3A patent/CN105178290B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001348867A (en) * | 2001-04-13 | 2001-12-21 | Nkk Corp | Screwed type steel pipe and its work execution method |
| CN101126237A (en) * | 2007-09-29 | 2008-02-20 | 周亚萍 | Blasting pile-forming method for three-stage bottom-enlarging prefabricated and cast-in-situ steel concrete combination pile body |
| CN101235639A (en) * | 2008-02-18 | 2008-08-06 | 翟宇思 | Exploding expanding device for concrete filling pore bottom exploding expanding pile and pile forming method |
| CN102031775A (en) * | 2010-06-12 | 2011-04-27 | 中铁十六局集团有限公司 | Construction technology of drilled pile in hard oblique rocks by medium hole blasting |
| CN101942831A (en) * | 2010-09-16 | 2011-01-12 | 关洪军 | Method for blasting and enlarging jet grouting pile |
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| Publication number | Publication date |
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| CN105178290A (en) | 2015-12-23 |
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| CB03 | Change of inventor or designer information |
Inventor after: Du Yong Inventor after: Xu Shuqiang Inventor after: Wang Zeping Inventor before: Du Yong Inventor before: Wang Zeping |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |