CN214423170U - Beam penetrating device for cast-in-situ large-span continuous beam steel strand - Google Patents
Beam penetrating device for cast-in-situ large-span continuous beam steel strand Download PDFInfo
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- CN214423170U CN214423170U CN202022653921.1U CN202022653921U CN214423170U CN 214423170 U CN214423170 U CN 214423170U CN 202022653921 U CN202022653921 U CN 202022653921U CN 214423170 U CN214423170 U CN 214423170U
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Abstract
The utility model discloses a ware is worn to restraint of cast-in-place large-span continuous beam steel strand wires, including traction head, anchor ring and safety cover, traction head connects on the steel strand wires that stretch out at the orderly steel strand wires center of tip, and traction head passes through-hole and bottom and the through-hole joint on safety cover top, and outside the tip of steel strand wires was located to the anchor ring cover, the lower extreme of safety cover was located to the anchor ring cover. The utility model discloses wear to restraint ware simple structure makes the intertarallel not hank between same bundle of steel strand wires, has reduced disconnected silk rate, has greatly improved prestressed structure construction quality and has worn to restraint efficiency, and construction operation process is simple and convenient, can effectively avoid the condition that the steel strand wires atress is uneven even disconnected silk in the steel strand wires leads to follow-up stretch-draw because of hank, wears to restraint the in-process and has both reduced safe risk and construction cost, has shortened construction period again, is applicable to various types of post-tensioning method prestressing force and wears to restraint the construction.
Description
Technical Field
The utility model relates to a technical field that the bundle was worn to the steel strand wires especially relates to a ware is worn to restraint of cast-in-place large-span continuous beam steel strand wires.
Background
A12 # to 15# pier of the double-line super bridge of the high-speed railway adopts a (60+100+60) m continuous beam to cross provinces and rivers, and a beam body is of a single-box single-chamber, three-way prestress system and C50 concrete structure. The lower edge of the beam bottom changes according to a quadratic parabola, and the beam height changes from a 0# block 7.835m to a 14# closure block 4.835 m. The longitudinal prestressed steel strand bundle is divided into a top plate, a web plate and a bottom plate, wherein 16-phi 15.2 steel strands are adopted for the top plate prestressed bundles T1-T16, 12-phi 15.2 steel strands are adopted for the web plate prestressed bundles F1-F18, 16-phi 15.2 steel strands are adopted for the mid-span bottom plate prestressed steel strand bundle B1-B10, 16-phi 15.2 steel strands are adopted for the side-span bottom plate prestressed bundles B11-B16, and galvanized corrugated pipes with the inner diameters of 90mm and 100mm are adopted for the prestressed pipeline. Besides single-end tensioning of the side span bottom plate prestressed tendons, two-end tensioning is adopted during construction of other steel tendons, and the prestressed tendons of 3# to 16# blocks have curve changes in the vertical and horizontal directions, so that the side span bottom plate prestressed tendon tensioning method belongs to extremely complex ultra-long tendon prestressed field tensioning engineering.
In the prior art, the end of each steel strand is wrapped by a plastic adhesive tape, the same bundle of steel strands is classified together and bound by binding wires, each steel strand is manually penetrated through a prestressed pipeline one by one, more personnel are needed in the operation process, the strand penetrating time is longer, and the cost is higher; the steel strand wires are easy to twist in the strand pulling process, and stress is uneven in the tensioning process, so that part of the steel strand wires can be broken by pulling. Because the prestressed pipeline has flat bending and vertical bending simultaneously, and the number of the steel strand bundles is large, the steel strand is often clamped in the construction, and the steel strand cannot be smoothly threaded.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cast-in-place large-span continuous beam steel strand wires wear to restraint ware to solve the problem that above-mentioned prior art exists, make the steel strand wires wear to restraint construction easy and simple to handle, reduced disconnected silk rate, shortened construction period, improved and worn to restraint efficiency and prestressed structure construction quality.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a ware is worn to restraint of cast-in-place large-span continuous beam steel strand wires, including pulling head, anchor ring and safety cover, pull the head and connect on the steel strand wires that stretch out at the orderly steel strand wires center of tip, pull the head and pass the through-hole and the bottom on safety cover top with the through-hole joint, anchor ring cover is located outside the tip of steel strand wires, anchor ring cover is located the lower extreme of safety cover.
Preferably, the traction head comprises a steel ring and a U-shaped connector, the steel ring is welded in the U-shaped opening end of the connector, and the steel ring can only accommodate one steel strand.
Preferably, the connector is round steel with the diameter of 8mm, and the length of the connector is 150mm-200 mm.
Preferably, the steel plate of the steel ring has the thickness of 3mm, the inner diameter of 15.5mm and the height of 45 mm.
Preferably, the safety cover includes transition connection toper section and ring section, the diameter of the top through-hole of safety cover is 42mm, the open-ended diameter in bottom is 80mm, the height of safety cover is 80mm, steel sheet thickness is 3 mm.
Preferably, the steel plate of the anchoring ring has a thickness of 3mm, a width of 60mm and an inner diameter of 73 mm.
Preferably, a steel wedge is arranged between the anchoring ring and the steel strand bundle.
Preferably, the steel strand at the center of the steel strand bundle extends out of the end face of the steel strand bundle by 15 mm.
The utility model discloses for prior art gain following technological effect:
the utility model discloses wear to restraint ware simple structure makes the intertarallel not hank between same bundle of steel strand wires, has reduced disconnected silk rate, has greatly improved prestressed structure construction quality and has worn to restraint efficiency, and construction operation process is simple and convenient, can effectively avoid the condition that the steel strand wires atress is uneven even disconnected silk in the steel strand wires leads to follow-up stretch-draw because of hank, wears to restraint the in-process and has both reduced safe risk and construction cost, has shortened construction period again, is applicable to various types of post-tensioning method prestressing force and wears to restraint the construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a strand pulling device for a cast-in-place large-span continuous beam steel strand of the utility model;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic structural view of a traction head in the strand pulling device of the cast-in-situ large-span continuous beam steel strand of the utility model;
FIG. 4 is a schematic structural view of a protective cover in the strand pulling device of the cast-in-place large-span continuous beam steel strand of the utility model;
wherein: 1-traction head, 2-connector, 3-steel ring, 4-protective cover, 5-anchoring ring and 6-steel strand.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model aims at providing a cast-in-place large-span continuous beam steel strand wires wear to restraint ware to solve the problem that prior art exists, make the steel strand wires wear to restraint construction easy and simple to handle, reduced disconnected silk rate, shortened construction period, improved and worn to restraint efficiency and prestressed structure construction quality.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 4: this embodiment provides a ware is worn to restraint of cast-in-place large-span continuous beam steel strand wires, including drawing head 1, anchor ring 5 and safety cover 4, on drawing head 1 connected in the orderly steel strand wires 6 that stretch out of one at steel strand wires center of tip, drawing head 1 passes through the through-hole and the bottom and the through-hole joint on 4 tops of safety cover, outside the tip of steel strand wires was located to anchor ring 5 cover, the lower extreme of safety cover 4 was located to anchor ring 5 cover.
The traction head 1 comprises a steel ring 3 and a U-shaped connector 2, the steel ring 3 is welded in the U-shaped opening end of the connector 2, and the steel ring 3 can only contain one steel strand 6; the connector 2 is made of round steel with the diameter of 8mm, and the length of the connector 2 is 150mm-200 mm; the thickness of the steel plate of the steel ring 3 is 3mm, the inner diameter is 15.5mm, and the height is 45 mm.
The protection cover 4 comprises a transition connection conical section and a circular ring section, the diameter of a through hole in the top of the protection cover 4 is 42mm, the diameter of an opening in the bottom of the protection cover 4 is 80mm, the height of the protection cover 4 is 80mm, the thickness of a steel plate is 3mm, the circular ring section of the protection cover 4 is preferably sleeved on the anchoring ring 5, and the frictional resistance between the prestressed beam and the pipeline can be reduced in the beam penetrating process.
The steel plate of the anchoring ring 5 has a thickness of 3mm, a width of 60mm and an inner diameter of 73 mm. A steel wedge is arranged between the anchoring ring 5 and the steel strand bundle, and the steel wedge is nailed in the gap of the steel strand 6 in the anchoring ring 5, so that the bond stress of the anchoring ring 5 can be effectively increased, and the steel strand 6 is prevented from falling off in the traction process. The steel strand 6 at the center of the steel strand bundle extends out of the end face of the steel strand bundle by 15mm, and is conveniently connected with the traction head 1.
The method for pulling the steel strand of the cast-in-situ large-span continuous beam comprises the following specific steps: firstly, upsetting the traction end of a steel strand bundle to be orderly, extending a steel strand 6 at the center of the steel strand bundle out of the end face of the steel strand bundle by 15mm, installing an anchoring ring 5 at the end part of the steel strand bundle, installing a traction head 1 and a protective cover 4 on the extended steel strand 6, nailing a steel nail or a steel wedge between the steel ring 3 and the steel strand 6 in the reverse threading direction after the steel strand 6 passes through the steel ring 3 of the traction head, preventing the steel strand 6 from falling off in the traction process, and sleeving the protective cover 4 on the anchoring ring 5; and (3) pulling the traction head 1 by using a winch and a fixed pulley to penetrate, closing the winch and detaching the penetrating device after the penetrating device penetrates through the prestressed pipeline and the exposed length of the steel strand bundle meets the design requirement.
The strand pulling device is made of daily construction materials, extra cost investment is not needed to be increased, the strand pulling device is suitable for various post-tensioning prestress strand pulling constructions, the strand pulling device plays roles in strand weaving and isolation on steel strands, stress of the steel strands is uniform during tensioning, the probability of wire breakage of the steel strands in the prestress constructions is effectively reduced, construction safety factors are greatly improved, each steel strand can be guaranteed not to be mutually interpenetrated and parallel to each other, extra length of an alignment end of the same strand of steel strands is not needed to be considered, and partial steel strands are saved. The strand pulling device is simple in structure and convenient and fast to install, the next strand of strand can be synchronously installed in the strand pulling process, and the construction period is shortened by over 60%; by utilizing the strand pulling device for construction, the strand pulling of each section of steel strand is reduced from 12 working days to 3 working days, the construction cost is greatly reduced, the strand pulling efficiency is improved, and the labor cost can be saved by about 8 ten thousand yuan in the construction of the whole continuous beam.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides a ware is restrainted to wearing of cast-in-place large-span continuous beam steel strand wires which characterized in that: the traction head is connected to an extended steel strand at the center of a steel strand bundle with the tidy end, the traction head penetrates through a through hole in the top end of the protective cover, the bottom end of the protective cover is connected with the through hole in a clamped mode, the anchoring ring sleeve is arranged outside the end portion of the steel strand bundle, and the anchoring ring sleeve is arranged at the lower end of the protective cover.
2. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 1, wherein: the pull head includes the connector of steel ring and U type, the steel ring weld in the U type open end of connector, the steel ring only can hold one steel strand wires.
3. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 2, wherein: the connector is round steel with the diameter of 8mm, and the length of the connector is 150mm-200 mm.
4. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 2, wherein: the thickness of the steel plate of the steel ring is 3mm, the inner diameter is 15.5mm, and the height is 45 mm.
5. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 1, wherein: the safety cover includes transition connection toper section and ring section, the diameter of the top through-hole of safety cover is 42mm, the open-ended diameter in bottom is 80mm, the height of safety cover is 80mm, steel sheet thickness is 3 mm.
6. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 1, wherein: the steel plate thickness of anchor ring is 3mm, the width is 60mm, the internal diameter is 73 mm.
7. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 1, wherein: and a steel wedge is arranged between the anchoring ring and the steel strand bundle.
8. The strand pulling device for the cast-in-place large-span continuous beam steel strand according to claim 1, wherein: and the steel strand at the center of the steel strand bundle extends out of the end face of the steel strand bundle by 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022653921.1U CN214423170U (en) | 2020-11-17 | 2020-11-17 | Beam penetrating device for cast-in-situ large-span continuous beam steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022653921.1U CN214423170U (en) | 2020-11-17 | 2020-11-17 | Beam penetrating device for cast-in-situ large-span continuous beam steel strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214423170U true CN214423170U (en) | 2021-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022653921.1U Active CN214423170U (en) | 2020-11-17 | 2020-11-17 | Beam penetrating device for cast-in-situ large-span continuous beam steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214423170U (en) |
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- 2020-11-17 CN CN202022653921.1U patent/CN214423170U/en active Active
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