CN105178290A - Steel tube pile with blast expanding device - Google Patents
Steel tube pile with blast expanding device Download PDFInfo
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- CN105178290A CN105178290A CN201510497328.3A CN201510497328A CN105178290A CN 105178290 A CN105178290 A CN 105178290A CN 201510497328 A CN201510497328 A CN 201510497328A CN 105178290 A CN105178290 A CN 105178290A
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- explosive expansion
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- 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, be specially a kind of steel pipe pile being applied to ground operation, by installing in steel pipe pile or connecting explosive expansion device, and by the local school extension that explosive expansion forms a lantern-shaped assign to effectively improve the resistance to compression of stake, resistance to plucking anti-side to and comprehensive load capacity.
Background technology
At present, in traditional mode, foundation pile mainly plays a role by pile side resistance and end resistance; When occurring that building load is large especially, stake is needed to provide larger bearing capacity or in the similar engineering such as side slope consolidation projects and ocean engineering, time very high to resistance to plucking Capability Requirement, be also difficult to reach high-bearing capacity and high uplift resistance demand only by the method changing stake size.Therefore need to redesign a kind of new steel pipe pile and solve the problems referred to above.
Summary of the invention
The present invention is to solve when requiring very high to the bearing capacity of steel pipe pile or breakout capacity, common engineering steel pipe pile reaches high-bearing capacity and high uplift resistance demand by means of only varying sized being difficult to, and provides a kind of novel steel pipe pile with explosive expansion device.
The present invention adopts following technical scheme to realize:
With a steel pipe pile for explosive expansion device, as shown in Figure 1, comprise quick-fried swollen cylinder, the top of described quick-fried swollen cylinder connects main steel pipe, connects precentrum bottom it.
As shown in Figure 1, described quick-fried swollen cylinder inner bottom part and top are fixedly installed laminated construction respectively, between laminated construction, explosive expansion warehouse is installed in quick-fried swollen cylinder, the external surface of described explosive expansion warehouse is around formation cavity, this cavity and quick-fried swollen cylinder inwall form the ringwise closed explosive expansion storehouse of cross section, are provided with explosive in described explosive expansion storehouse; The axis place of described explosive expansion warehouse offers axial hole, described axial hole bottom and the some radial holes be opened in the middle part of explosive expansion warehouse UNICOM simultaneously; Be provided with exploding wire in described axial hole, described exploding wire is connected with blasting machine through the laminated construction being positioned at quick-fried swollen cylinder top.
When explosive explosive expansion, it can produce very large pressure.By controlling the type of selected explosive, weight and shape, the integrality of quick-fried swollen cylinder (quick-fried and broken and control to expand shape) can be kept.As shown in Figure 3, the local school extension forming a lantern-shaped by explosive expansion assign to effectively improve the resistance to compression of stake, resistance to plucking and anti-side to comprehensive load capacity.
After explosive explosive expansion, in general, for avoiding the steel pin connecting main steel pipe and quick-fried swollen cylinder to suffer damage.And precentrum is impaired.Main steel pipe, quick-fried swollen cylinder and precentrum need to adopt the material having higher stake yield strength, ultimate strength, particularly high ductility, usually can adopt structural iron, stainless steel, copper or copper alloy, aluminum or aluminum alloy.In order to huge pressure can be born, not only require that the size of quick-fried swollen cylinder and tube wall should be greater than critical thickness, and laminated construction also must have the ability greatly reducing shock strength.
When a shock wave through interconnected materials by visibly different acoustic impedance or the laminated construction that is made up of fibre reinforced composites, it will disperse very soon.Disperse, slacken the ability of shock wave to depend primarily on the diversity of acoustic impedance between materials at two layers.In order to prevent steel pin and precentrum undermined, be provided with bottom laminated construction and top laminate structure to weaken the impact of shock wave on other part pile bodies and coupling part.Shock wave will be decayed rapidly in by laminated construction process.When the pressure by previous Shockwave during laminated construction will greatly reduce.High pressure explosive expansion gas will be discharged by radial hole and axial hole.Some laminated materials being welded to quick-fried swollen cylinder inwall will be separated in the immense pressure lower part of explosive, but still some will be intact.So in this way, the integrality of polycrystalline substance still can retain, and steel pin can not be damaged or broken.
Under the effect of explosive, quick-fried swollen cylinder will expand rapidly outwardly.The high pressure of quick-fried swollen cylinder periphery makes the soil pressure outside pipe contract, and substantially increases compactness and the intensity of soil.Conversely, the soil pressure that pipe appearance is subject to also will improve greatly.At high strain-rate (>10
3/ s) when, the yield stress of quick-fried swollen bobbin body material will be increased further.When judging the interaction of explosive and quick-fried swollen cylinder, this factor must be taken into account.In addition, temperature is also a factor needing to consider.
When shock wave propagates into soil from quick-fried swollen cylinder, shock wave by reflection, incide in soil.According to shock theory physics, back wave is a kind of rare ripple, and incidence wave is a kind of compressional wave, and density of soil can be made to increase, thus intensity increases.
Beneficial effect of the present invention is as follows:
In traditional mode, foundation pile affords the effect of frictional force, and frictional force is P*m, and wherein P is the normal pressure of soil, m is soil and pile body surface friction factor.But adopt in above-mentioned pattern, what foundation pile was born not only has frictional force, also has the normal pressure being far longer than frictional force.In fact in the present invention, even if frictional force is also greater than traditional mode, because the squeeze pressure P of surrounding soil in explosive expansion is than large in traditional mode, therefore, steel pipe pile can bear larger load.So the present invention has significant advantage.Under identical bearing capacity, the pipe of smaller szie can be used, and reach same support effect, greatly can reduce construction costs, there is larger promotional value.
Accompanying drawing explanation
Fig. 1 represents steel pipe pile generalized section before explosive expansion.
Fig. 2 represents the A-A sectional view of Fig. 1.
Fig. 3 represents steel pipe pile generalized section after explosive expansion.
In figure, the main steel pipe of 1-, the quick-fried swollen cylinder of 2-, 3-precentrum, 4-laminated construction, 5-explosive expansion warehouse, 6-explosive expansion storehouse, 7-explosive, 8-axial hole, 9-radial hole, 10-exploding wire, 11-initiator, 12-reinforcing ring, 13-steel pin, 14-bolt, 15-screw.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
With a steel pipe pile for explosive expansion device, be made up of with precentrum 3 main steel pipe 1, quick-fried swollen cylinder 2.Main steel pipe 1 is connected to the top of quick-fried swollen cylinder 2 by a steel pin 13.Precentrum 3 is the bottoms being installed to quick-fried swollen cylinder 2 by four screws or helicitic texture.Explosive expansion device is installed in quick-fried swollen cylinder 2, mainly comprises: a bottom laminated construction, is made up of one group of bilayer or sandwich construction; A top set structure, is made up of one group of bilayer or sandwich construction.A blasting system, is made up of explosive expansion thing (explosive 7), explosive expansion warehouse 5, exploding wire 10, initiator 11.
Concrete structure in quick-fried swollen cylinder is as follows:
As shown in Figure 1, quick-fried swollen cylinder 2 inner bottom part and top are fixedly installed laminated construction 4 respectively, and laminated construction can be made up of two layerings or sandwich construction, but must be at least that two kinds of different materials make.For the laminated construction of a two layering, wherein the acoustic impedance of layer of material must lower than another layer material.The definition of acoustic impedance is Cr, wherein C and the r speed of representative voice and the density of material respectively.And for the laminated construction of multilayer, the acoustic impedance of layers of material also must be inequality.Layers of material can adopt metal or nonmetals (fibre reinforced composites).Upper and lower laminated construction may have the identical number of plies and same layer material, also may have different number of plies amounts and layer material.This depends on individual actual conditions completely.The first floor material being positioned at the laminated material of quick-fried swollen cylinder must be welded on quick-fried swollen cylinder, makes this structure more powerful, allow steel pin from infringement with this.But the laminated construction being positioned at quick-fried swollen cylinder bottom need not be welded to quick-fried swollen cylinder, but bolt is used to be installed on explosive expansion warehouse.
As shown in Figure 1, between laminated construction 4, explosive expansion warehouse 5 is installed in quick-fried swollen cylinder 2, the external surface of described explosive expansion warehouse 5 is around formation cavity, this cavity and quick-fried swollen cylinder 2 inwall form the ringwise closed explosive expansion storehouse 6 of cross section, be provided with explosive 7 in described explosive expansion storehouse 6, explosive 7 also can be replaced by solid propellant.The effect in explosive expansion storehouse is constraint explosive expansion, and by changing shape, length, diameter, the pipe shape that can be formed after controlled blasting, so that it can bear peak power.Usually, after explosive expansion, the external diameter of quick-fried swollen cylinder will expand as original minimum twice.The area of its section also will increase at least 4 times.
As shown in Figure 1, 2, the axis place of described explosive expansion warehouse 5 offers axial hole 8, described axial hole 8 bottom and the some radial holes 9 be opened in the middle part of explosive expansion warehouse 5 UNICOM simultaneously; Be provided with exploding wire 10 in described axial hole 8, described exploding wire 10 is connected with initiator 11 through the laminated construction 4 being positioned at quick-fried swollen cylinder 2 top, and initiator closely must contact can successfully ignite with exploding wire 64.Initiator is explosive initiation point.Explosive expansion ripple is propagated along an axial hole 8 and some radial holes 9.These radial holes (at least 8 hole) are evenly distributed on the same cross section of explosive expansion warehouse 5, and by radial hole, explosive expansion ripple can be transmitted to successfully, equably in explosive expansion storehouse 6 to ignite and expand medicine 7.
As shown in Figure 1, be positioned at above and below explosive expansion storehouse 6 and be installed with reinforcing ring 12 respectively outside described quick-fried swollen cylinder 2, be used for reducing the unnecessary expansion of pile pipe, reinforcing ring 12 adopts metal material or fibre reinforced composites.
As shown in Figure 3, the local school extension forming a lantern-shaped by explosive expansion assign to effectively improve the resistance to compression of stake, resistance to plucking and anti-side to comprehensive load capacity.
Anyly modify to technical scheme of the present invention or equivalent to replace, do not depart from the spirit and scope of technical scheme of the present invention, it all should be contained in claims of the present invention.
Claims (10)
1. with a steel pipe pile for explosive expansion device, comprise quick-fried swollen cylinder (2), the top of described quick-fried swollen cylinder (2) connects main steel pipe (1), connects precentrum (3) bottom it;
It is characterized in that: described quick-fried swollen cylinder (2) inner bottom part and top are fixedly installed laminated construction (4) respectively, explosive expansion warehouse (5) is installed between the interior laminated construction of quick-fried swollen cylinder (2) (4), the external surface of described explosive expansion warehouse (5) is around formation cavity, this cavity and quick-fried swollen cylinder (2) inwall form the ringwise closed explosive expansion storehouse (6) of cross section, are provided with explosive (7) in described explosive expansion storehouse (6); The axis place of described explosive expansion warehouse (5) offers axial hole (8), described axial hole (8) bottom and some radial holes (9) UNICOM being simultaneously opened in explosive expansion warehouse (5) middle part; Be provided with exploding wire (10) in described axial hole (8), described exploding wire (10) is connected with initiator (11) through the laminated construction (4) being positioned at quick-fried swollen cylinder (2) top.
2. the steel pipe pile with explosive expansion device according to claim 1, is characterized in that: be positioned at above and below explosive expansion storehouse (6) outside described quick-fried swollen cylinder (2) and be installed with reinforcing ring (12) respectively.
3. the steel pipe pile with explosive expansion device according to claim 1 and 2, is characterized in that: described laminated construction (4) is made up of two layerings or sandwich construction, and the acoustic impedance of layers of material is inequality.
4. the steel pipe pile with explosive expansion device according to claim 3, is characterized in that: the layers of material of described laminated construction (4) adopts metal material or fibre reinforced composites.
5. the steel pipe pile with explosive expansion device according to claim 4, is characterized in that: the first floor being positioned at the laminated construction (4) of quick-fried swollen cylinder (2) inner top welds with quick-fried swollen cylinder (2); The laminated construction (4) being positioned at quick-fried swollen cylinder (2) inner bottom part is connected with explosive expansion warehouse (5) by bolt (14).
6. the steel pipe pile with explosive expansion device according to claim 1, is characterized in that: described main steel pipe (1) is connected by steel pin (13) with quick-fried swollen cylinder (2); Described quick-fried swollen cylinder (2) is connected by screw (15) or helicitic texture with precentrum (3).
7. the steel pipe pile with explosive expansion device according to claim 6, is characterized in that: described main steel pipe (1), quick-fried swollen cylinder (2) and precentrum (3) adopt structural iron, stainless steel, copper or copper alloy, aluminum or aluminum alloy is made.
8. the steel pipe pile with explosive expansion device according to claim 7, is characterized in that: described radial hole (9) is evenly positioned at same cross section, quantity at least 8.
9. the steel pipe pile with explosive expansion device according to claim 8, is characterized in that: described explosive (7) is replaced by solid propellant.
10. the steel pipe pile with explosive expansion device according to claim 2, is characterized in that: described reinforcing ring (12) adopts 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510497328.3A CN105178290B (en) | 2015-08-14 | 2015-08-14 | Steel tube pile with blast expanding device |
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| CN105178290A true CN105178290A (en) | 2015-12-23 |
| CN105178290B CN105178290B (en) | 2017-05-10 |
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| CN201510497328.3A Expired - Fee Related CN105178290B (en) | 2015-08-14 | 2015-08-14 | Steel tube pile with blast expanding device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013096A (en) * | 2016-07-02 | 2016-10-12 | 韩少鹏 | Construction method of building foundation |
| CN106120720A (en) * | 2016-07-02 | 2016-11-16 | 韩少鹏 | A kind of construction foundation working equipment |
| CN107356487A (en) * | 2017-08-22 | 2017-11-17 | 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 reflections under high explosive effect |
| CN114319331A (en) * | 2022-03-08 | 2022-04-12 | 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 |
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| 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 |
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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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013096A (en) * | 2016-07-02 | 2016-10-12 | 韩少鹏 | Construction method of building foundation |
| CN106120720A (en) * | 2016-07-02 | 2016-11-16 | 韩少鹏 | A kind of construction foundation working equipment |
| CN106120720B (en) * | 2016-07-02 | 2018-02-13 | 南通大学 | A kind of construction foundation working equipment and construction method |
| CN107356487A (en) * | 2017-08-22 | 2017-11-17 | 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 reflections under high explosive effect |
| 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 |
| CN114319331A (en) * | 2022-03-08 | 2022-04-12 | 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 |
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| CN105178290B (en) | 2017-05-10 |
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Inventor after: Du Yong Inventor after: Xu Shuqiang Inventor after: Wang Zeping Inventor before: Du Yong Inventor before: Wang Zeping |
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