CN203160233U - Prestressed concrete pile equipped with recoverable steel strands - Google Patents
Prestressed concrete pile equipped with recoverable steel strands Download PDFInfo
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- CN203160233U CN203160233U CN 201320155339 CN201320155339U CN203160233U CN 203160233 U CN203160233 U CN 203160233U CN 201320155339 CN201320155339 CN 201320155339 CN 201320155339 U CN201320155339 U CN 201320155339U CN 203160233 U CN203160233 U CN 203160233U
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- prestressed concrete
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Abstract
Provided is a prestressed concrete pile equipped with recoverable steel strands. The prestressed concrete pile comprises a concrete pile body, a plurality of vertical threaded reinforcing steel bars, a plurality of single-row type prestressed tendons, a spiral tendon, a plurality of outer anchorage devices and a plurality of inner anchorage devices, wherein the concrete pile body is of a cylindrical type concrete structure, the plurality of vertical threaded reinforcing steel bars and the plurality of prestressed tendons are arranged along the circumference of the concrete pile body, the spiral tendon is arranged outside the vertical threaded reinforcing steel bars and the prestressed tendons in a bound or welded mode, the upper end of each steel strand is provided with one inner anchorage device, and the lower end of each steel strand is provided with one outer anchorage device. The prestressed concrete pile equipped with the recoverable steel strands has the advantages that the cross section of the prestressed concrete pile is large in flexural rigidity and flexural bearing capacity, inward horizontal deformation of the prestressed concrete pile can be reduced, sedimentation of the ground or a building (construction) outside a foundation ditch can be reduced, the diameter of the cross section of the pile can be reduced, and due to the fact that the steel strands are recoverable, resources are saved, building cost of a project is reduced, and the prestressed concrete pile equipped with recoverable steel strands is green and environment-friendly.
Description
Technical field
The utility model belongs to underground space bracing of foundation pit field of engineering technology, particularly relates to a kind of prestressed concrete pile of being furnished with recyclable steel strand.
Background technology
Reinforced concrete structure is under the effect of moment of flexure, structure tension side concrete can ftracture, if crack width is limited in the 0.2-0.25mm that allows, the tensile stress of reinforcing bar also can only reach 150-250MPa, this just makes high tensile reinforcement can't play one's part to the full in reinforced concrete structure, equally also can not bring into play the effect of high-strength concrete.And, the reinforced concrete structure of band crack work, the tensile region concrete material can not play one's part to the full, the rigidity of structure descends bigger.High tensile reinforcement and high-strength concrete have high cost performance.
Underground space foundation pit enclosure structure form often adopts multiple tracks support+reinforced concrete pile or multiple tracks prestressed anchor (anchor cable)+concrete-steel concrete pile at present.Because tensile strength of reinforcement is low, so amount of reinforcement is big, and reinforcing bar is not recyclable; In addition; under the soil pressure effect; the concrete of reinforced concrete pile tension side can produce the crack; the reinforced concrete pile cross section bending rigidity of band crack work will obviously reduce; therefore; the protection of relatively poor, the foundation ditch surrounding enviroment of geological conditions requires when stricter when the place; usually need to adopt to have larger diameter, the more reinforced concrete pile of arrangement of reinforcement; so that reinforced concrete pile has enough bearing capacities and rigidity; guarantee that with this underground structure construction safety and the sedimentation of foundation ditch surrounding ground can control in the allowed band value, will increase construction costs so undoubtedly.
Chinese patent application discloses foundation pit enclosure structure and the job practices of being furnished with presstressed reinforcing steel on a kind of vertical soil-baffling structure No. 201210245291.1, because the bottom of the presstressed reinforcing steel in this foundation pit enclosure structure is the U font, and ground tackle is not installed in the bottom, therefore reclaiming presstressed reinforcing steel needs bigger pulling capacity, so difficulty of construction is big.
A kind of cast-in-place concrete pile that adopts steel bar for prestressed concrete is disclosed in No. the 200420029700.5th, the Chinese patent application, the difference of this cast-in-place concrete pile and ordinary concrete stake is to adopt steel bar for prestressed concrete, owing to do not apply prestressing force on the rod iron, therefore pile body cracking resistance, tensile property are not improved, and rod iron is not recyclable.
Disclose multiple prestressed concrete pile and job practices in the Chinese patent application the 01253503.6th, 03113753.9,01126590.6 and No. 200410081456.1, but that its common shortcoming also is presstressed reinforcing steel on it is not recyclable.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of cross section bending rigidity and bearing capacity big and can reduce the prestressed concrete pile of being furnished with recyclable steel strand of construction costs.
In order to achieve the above object, the prestressed concrete pile of being furnished with recyclable steel hinge line that the utility model provides comprises concrete pile body, many vertical indented barss, many single-column type presstressed reinforcing steels, spiral bar, a plurality of outer ground tackle and a plurality of interior ground tackles; Wherein the concrete pile body is cylinder bodily form concrete structure; Many vertical indented barss and Duo Gen presstressed reinforcing steel are along the periphery of concrete pile body; Spiral bar adopts the mode of colligation or welding to be arranged on the outside of vertical indented bars and presstressed reinforcing steel; The lower end of every steel hinge line and upper end are separately installed with an interior ground tackle and outer ground tackle.
Described vertical indented bars and presstressed reinforcing steel arrange in the mode that replaces along whole concrete pile body periphery; Or presstressed reinforcing steel is along the local periphery of concrete pile body, and all the other peripheries only dispose vertical indented bars.
Described presstressed reinforcing steel by one or more surface applied by the steel hinge line of one deck cosmoline fat be enclosed within its outside bellows or plastic pipe is formed.
The single periphery along the concrete pile body of described presstressed reinforcing steel, or many be in juxtaposition along the circumferential arrangement of concrete pile.
The diameter of described vertical indented bars is 14-36mm; the diameter of concrete pile body is 600-2500mm; the diameter of spiral bar is 10-22mm; the pitch of spiral bar is 80-300mm; strength grade of concrete is C30-C80, the thickness of concrete cover 50-70mm of presstressed reinforcing steel and vertical indented bars.
The prestressed concrete pile of being furnished with recyclable steel hinge line that the utility model provides has following beneficial effect:
(1) because prestressed concrete pile has been applied in prestressing force, so the cross section bending rigidity is big, therefore is conducive to reduce the sedimentation of the inside horizontal distortion of prestressed concrete pile and the outer ground of foundation ditch or building;
(2) treat underground structure construction the finish recyclable steel hinge line in back and recycling, therefore can save resource, reduce construction costs;
(3) prestressed concrete pile of being furnished with steel hinge line can adopt bigger reinforcement ratio, improves the stake anti-bending bearing capacity significantly, therefore can reduce concrete amount and boring expense, thereby reduces engineering cost, environmental protection.
Description of drawings
The prestressed concrete pile that Fig. 1 provides for the utility model is the vertical structure sectional view during with the stull coupling;
The prestressed concrete pile that Fig. 2 provides for the utility model adopts the vertical structure sectional view of cantilevered fashion;
Vertical structure sectional view when the prestressed concrete pile that Fig. 3 provides for the utility model and four road stull couplings;
Fig. 4 is the prestressed concrete pile structural section schematic diagram that vertical indented bars and presstressed reinforcing steel arrange along whole periphery.
Fig. 5 is the prestressed concrete pile structural section schematic diagram that presstressed reinforcing steel arranges along local periphery.
The prestressed concrete pile structural section schematic diagram that Fig. 6 is set up in parallel for presstressed reinforcing steel.
Fig. 7 is spiral bar structural representation in the prestressed concrete pile;
Fig. 8 has presstressed reinforcing steel structure sectional view in the prestressed concrete pile of a steel hinge line.
Fig. 9 has presstressed reinforcing steel structure sectional view in the prestressed concrete pile of many steel hinge lines.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the prestressed concrete pile of being furnished with recyclable steel hinge line that the utility model provides is elaborated.
As Fig. 1-shown in Figure 9, the prestressed concrete pile of being furnished with recyclable steel hinge line that the utility model provides comprise concrete pile body 1, many vertical indented barss 4, many single-column type presstressed reinforcing steels 5, spiral bar 6, a plurality of outer ground tackle 9 and a plurality of in ground tackles 10; Wherein concrete pile body 1 is cylinder bodily form concrete structure, and vertical indented bars 4 and presstressed reinforcing steel 5 are the vertical applied force muscle, and the number needs of vertical indented bars 4 and presstressed reinforcing steel 5 is determined according to Force Calculation; Many vertical indented barss 4 and Duo Gen presstressed reinforcing steel 5 are along the periphery of concrete pile body 1; Spiral bar 6 adopts the mode of colligation or welding to be arranged on the outside of vertical indented bars 4 and presstressed reinforcing steel 5; The lower end of every presstressed reinforcing steel 5 and upper end are separately installed with an interior ground tackle 10 and outer ground tackle 9.The concrete structure of interior ground tackle 10 can be referring to disclosed content in No. the 200710117673.5th, the Chinese patent application.
Described vertical indented bars 4 and presstressed reinforcing steel 5 arrange in the mode that replaces along whole concrete pile body 1 periphery; Or presstressed reinforcing steel 5 is along concrete pile body 1 local periphery and all the other peripheries only dispose vertical indented bars 4.
Described presstressed reinforcing steel 5 is made up of steel hinge line 7 and cover bellows or the plastic pipe 11 externally of one deck cosmoline fat one or more surface applied.
Described presstressed reinforcing steel 5 single periphery along concrete pile body 1, or many be in juxtaposition along the circumferential arrangement of concrete pile 1.
The diameter of described vertical indented bars 4 is 14-36mm; the diameter of concrete pile body 1 is 600-2500mm; the diameter of spiral bar 6 is 10-22mm; the pitch of spiral bar 6 is 80-300mm; strength grade of concrete is C30-C80, the thickness of concrete cover 50-70mm of presstressed reinforcing steel 5 and vertical indented bars 4.
The job practices of the prestressed concrete pile of being furnished with recyclable steel hinge line that the utility model provides comprises the following step that carries out in order:
1) at first adopt boring or manually digging hole to carry out the pore-forming operation along the predeterminated position of planning to build the underground structure outer rim;
2) with steel hinge line 7 surface applied one deck cosmoline fat, bellows or plastic pipe 11 and form presstressed reinforcing steel 5 on its outer cover then, and an interior ground tackle 10 is installed in the lower end of every presstressed reinforcing steel 5, the mode that adopts colligation or welding according to the structure of above-mentioned prestressed concrete pile is made into reinforcing cage with many vertical indented barss 4, many steel hinge lines 5 and spiral bar 6;
3) insert a reinforcing cage respectively in each hole, concrete perfusion in the stake hole treats that concrete setting sclerosis back forms concrete pile body 1 then;
4) treat that above-mentioned concrete pile body 1 maintenance is after the intensity of designing requirement, applying of reinforced concrete circle beam 3 carried out at top at all concrete pile bodies 1, in this process, the upper end of vertical indented bars 4 is extend in the reinforced concrete circle beam 3, and stretch out outside the end face of reinforced concrete circle beam 3 upper end of presstressed reinforcing steel 5;
5) treat that reinforced concrete circle beam 3 maintenances are after the intensity of designing requirement, utilize the stretch-draw instrument that steel hinge line 7 is carried out stretch-draw, adopt outer ground tackle 9 that the upper end of presstressed reinforcing steel 5 is anchored at the end face of reinforced concrete circle beam 3, thereby finish prestressed concrete pile is applied prestressing force;
6) beginning pit earthwork excavation and underground structure apply, treat underground structure in the foundation ditch apply finish after, utilize the stretch-draw instrument that the outer ground tackle 9 of steel hinge line 7 upper ends is removed, with the stretching force on the removal presstressed reinforcing steel 5;
7) repeatedly beat the upper end of steel hinge line 7 with hand hammer, so that the elastic clip on the interior ground tackle 10 is peeled off from the lower end of steel hinge line 7;
8) hold the upper end of steel hinge line 7 and it is extracted out reclaimed from concrete pile body 1, can finish the described work progress of being furnished with the prestressed concrete pile of recyclable steel hinge line.
Claims (5)
1. prestressed concrete pile of being furnished with recyclable steel strand is characterized in that: described prestressed concrete pile comprise concrete pile body (1), many vertical indented barss (4), many single-column type presstressed reinforcing steels (5), spiral bar (6), a plurality of outer ground tackle (9) and a plurality of in ground tackle (10); Wherein concrete pile body (1) is cylinder bodily form concrete structure; Many vertical indented barss (4) and many presstressed reinforcing steels (5) are along the periphery of concrete pile body (1); Spiral bar (6) adopts the mode of colligation or welding to be arranged on the outside of vertical indented bars (4) and presstressed reinforcing steel (5); The lower end of every steel hinge line (7) and upper end are separately installed with an interior ground tackle (10) and outer ground tackle (9).
2. the prestressed concrete pile of being furnished with recyclable steel strand according to claim 1 is characterized in that: described vertical indented bars (4) and presstressed reinforcing steel (5) arrange in the mode that replaces along whole concrete pile body (1) periphery; Or presstressed reinforcing steel (5) is along the local periphery of concrete pile body (1) and all the other peripheries only dispose vertical indented bars (4).
3. the prestressed concrete pile of being furnished with recyclable steel strand according to claim 1 is characterized in that: described presstressed reinforcing steel (5) has the steel strand (7) of one deck cosmoline fat by one or more surface applied and is enclosed within its outside bellows or plastic pipe (11) is formed.
4. the prestressed concrete pile of being furnished with recyclable steel strand according to claim 1 is characterized in that: the single periphery along concrete pile body (1) of described presstressed reinforcing steel (5), or many be in juxtaposition along the circumferential arrangement of concrete pile (1).
5. the prestressed concrete pile of being furnished with recyclable steel strand according to claim 1; it is characterized in that: the diameter of described vertical indented bars (4) is 14-36mm; the diameter of concrete pile body (1) is 600-2500mm; the diameter of spiral bar (6) is 10-22mm; the pitch of spiral bar (6) is 80-300mm; strength grade of concrete is C30-C80, the thickness of concrete cover 50-70mm of presstressed reinforcing steel (5) and vertical indented bars (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155339 CN203160233U (en) | 2013-04-01 | 2013-04-01 | Prestressed concrete pile equipped with recoverable steel strands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155339 CN203160233U (en) | 2013-04-01 | 2013-04-01 | Prestressed concrete pile equipped with recoverable steel strands |
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| CN203160233U true CN203160233U (en) | 2013-08-28 |
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| CN 201320155339 Expired - Fee Related CN203160233U (en) | 2013-04-01 | 2013-04-01 | Prestressed concrete pile equipped with recoverable steel strands |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174134A (en) * | 2013-04-01 | 2013-06-26 | 中铁隧道勘测设计院有限公司 | Prestressed concrete pile with recoverable steel strands and construction method |
-
2013
- 2013-04-01 CN CN 201320155339 patent/CN203160233U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174134A (en) * | 2013-04-01 | 2013-06-26 | 中铁隧道勘测设计院有限公司 | Prestressed concrete pile with recoverable steel strands and construction method |
| CN103174134B (en) * | 2013-04-01 | 2015-06-24 | 中铁隧道勘测设计院有限公司 | Prestressed concrete pile with recoverable steel strands and construction method |
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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: 20130828 Termination date: 20170401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |