CN201843088U - Steel wire prestress tensioning device - Google Patents
Steel wire prestress tensioning device Download PDFInfo
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- CN201843088U CN201843088U CN2010202806861U CN201020280686U CN201843088U CN 201843088 U CN201843088 U CN 201843088U CN 2010202806861 U CN2010202806861 U CN 2010202806861U CN 201020280686 U CN201020280686 U CN 201020280686U CN 201843088 U CN201843088 U CN 201843088U
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Abstract
The utility model discloses a steel wire prestress tensioning device, which comprises a backing plate, vertical bolts, a lead screw, a connector and a tensioning steel wire. The backing plate is provided with vertical holes along the lower edge surface normal of a beam and a longitudinal hole along the trend of the beam when the backing plate is mounted; the vertical bolts are used for fixing the backing plate onto the bottom of the beam through the vertical holes; one end of the lead screw matches with the longitudinal hole; the connector is connected to the other end of the lead screw; and one end of the tensioning steel wire is fixed on the connector and extends along the trend of the beam to be fixed when in use. According to the technical scheme, the tensioning device is simple in structure and convenient in construction.
Description
Technical field
The utility model relates to a kind of steel wire body pre-stress stretching device, and the stretch-draw that is used for the outside prestressing steel wire bunch of bridge maintenance is installed.
Background technology
Bridge owing to the impact of the influence of extraneous various natural causes and vehicle causes bridge construction to produce disease, and then defective occurs during use, has a strong impact on the normal use of bridge.To be harmful to bridge and all rebuild both unrealistic also not science, therefore, to having the damaged reason of bridge analysis now and taking corresponding technical measures, old bridge is reinforced, transformed and keeps in repair, so that it satisfies the needs of new period highway communication transportation, the economy of can yet be regarded as is building method easily.
The external prestressing strengthening technology has been applied on multiple form of structure and the long-span bridge girder construction in China.The reinforcing principle of external prestressing method is in the lower edge tensile region of beam prestressed material to be set, by stretch-draw the beam body is produced eccentric prestress, under this eccentricity pressure effect, the beam body is arched up, offset the part selfweight stress, reduced malformation and crack width, improved structure stress, raising structural bearing capacity that can be by a relatively large margin.Compare with common prestressed reinforced concrete construction, the power muscle only is connected with beam at anchor point with original structure, is similar to the prestressing without bondn structure.This method increases the state that can significantly improve and adjust original structure under the very little situation in deadweight, improves the rigidity of structure, crack resistance.This method both had been applicable to the interim reinforcing when passing through loaded vehicle, also can be used as the permanent reinforcement measure that improves bridge capacity.The main usable condition of this method has: the serious corrosion of presstressed reinforcing steel or plain bars and other disease cause structural bearing capacity to descend in concrete beam; Need to improve the class of loading of bridge; Be used to control beam body crack and reinforcing bar fatigue stress amplitude; Be applicable to the structure under the high-stress state, especially the situations such as reinforcing of large scale structure.The method of external prestressing commonly used has strut-framed prestressed draw-bar reinforcing method and external prestress steel tendon reinforcing method at present.But existing method anchoring complexity, prestressing force applies complicated operation.In external prestress strengthening method, the reinforcement system that adopts is made up of horizontal bar, diagonal bar, last anchor point, slide block, support, horizontal bar fixed bearing etc. usually, and the arrangement form of presstressed reinforcing steel often adopts broken-line type or curvilinear style.This kind method complicated operation, consumptive material are more.
Summary of the invention
Therefore, the purpose of this utility model is to provide a kind of steel wire body pre-stress stretching device of simple in structure and easy construction.
The technical solution adopted in the utility model is:
The utility model steel wire body pre-stress stretching device, it comprises:
Backing plate has the vertical core in the lower edge face normal direction of backing plate installment state lower edge beam in advance, reaches along the vertical hole of beam trend;
Vertical bolt is used at the bottom of described vertical core is fixed in beam with described backing plate;
Screw mandrel, an end cooperates with described vertical hole;
Connector is connected in the other end of described screw mandrel; And
Stretching wire, an end is fixed on the described connector, and moves towards to extend and be fixed at user mode lower edge beam.
According to the steel wire body pre-stress stretching device of technical solutions of the utility model, described vertical bolt is implanted at first fixed end boring at the bottom of beam during use, described backing plate is installed then, the moment of flexure that backing plate produces when stretch-draw direction longer dimension is enough to resist stretch-draw.Just screw mandrel can be installed then, and connect stretching wire by connector.Stretch-draw is carried out in adjustment by screw mandrel, and it is very easy to construct.And simple in structure, follow-up processing is also very convenient.
Above-mentioned tensioning equipment, described vertical hole is a unthreaded hole, adaptably, screw mandrel is connected with described backing plate by adjusting nut.
Above-mentioned tensioning apparatus, described vertical core are provided with the counterbore corresponding to vertical bolt spiral shell head or nut.
Above-mentioned tensioning apparatus, described vertical core have two, and two vertical core branches occupy both sides, described vertical hole.
Above-mentioned tensioning apparatus, the position that described connector is connected with described screw mandrel is one blind hole, and has through hole in bottom, blind silk hole with extending, this through-hole aperture is less than blind silk hole path.
Above-mentioned tensioning equipment, there is hot galvanized layer on this tensioning equipment surface.
Description of drawings
Set forth the technical solution of the utility model more specifically below in conjunction with Figure of description, wherein:
Fig. 1 is that the beam body is partly represented in double dot dash line among the figure according to the user mode figure of the steel wire body tensioning equipment of technical solutions of the utility model.
Fig. 2 is the cross-sectional structural representation of backing plate.
Fig. 3 is the vertical profile structural representation of connector.
Among the figure: 1, beam body, 2, adjust nut, 3, vertical bolt, 4, backing plate, 5, screw mandrel, 6, connector, 7, stretching wire, 8, the backing plate body, 9, vertical hole, 10, counterbore, 11, vertical core, 12, blind silk hole, 13, through hole.
The specific embodiment
With reference to explanation accompanying drawing 1, it shows a kind of steel wire body pre-stress stretching device, and it comprises:
Vertical bolt 3 is used at the bottom of described vertical core is fixed in beam with described backing plate;
Screw mandrel 5, one ends cooperate with described vertical hole;
Connector 6 is connected in the other end of described screw mandrel; And
Stretching wire 7, one ends are fixed on the described connector, and move towards to extend and be fixed at user mode lower edge beam.
For backing structure, generally, owing to be a plane at the bottom of the beam, so backing plate is that rectangular structure is proper, also is convenient to pore-forming.Certainly, also might be curved surface at the bottom of the beam, so the upper bottom surface of backing plate can profiling at the bottom of beam, with the reliability that guarantees to install.
For the ease of adjusting, described vertical hole is a unthreaded hole, and adaptably, screw mandrel is connected with described backing plate by adjusting nut 2.This is to have considered that screw mandrel do not make the situation of circumferential movement, carries out stretch-draw by the adjustment of adjusting nut.Simultaneously, also can carry out the conversion of key element, screw mandrel is moving, and the spiral shell head is set on the screw mandrel again, and connector is motionless, also is easy to realize.
In order to make tensioning device structure compacter, described vertical core is provided with the counterbore 10 corresponding to vertical bolt spiral shell head or nut.
In order to guarantee the stability under the tensioning apparatus installment state, described vertical core has two, and two vertical core branches occupy both sides, described vertical hole.
The position that described connector is connected with described screw mandrel is one blind hole 12, and has through hole 13 in bottom, blind silk hole with extending, and this through-hole aperture is convenient to the installation of stretching wire less than blind silk hole path, and is such as in the knotting of connector portion, simple in structure.
In order to improve the application life of tensioning equipment, there is hot galvanized layer on this tensioning equipment surface.
Claims (6)
1. steel wire body pre-stress stretching device is characterized in that it comprises:
Backing plate (4) has the vertical core (11) in the lower edge face normal direction of backing plate installment state lower edge beam in advance, reaches along the vertical hole (9) of beam trend;
Vertical bolt (3) is used at the bottom of described vertical core is fixed in beam with described backing plate;
Screw mandrel (5), an end cooperates with described vertical hole;
Connector (6) is connected in the other end of described screw mandrel; And
Stretching wire (7), an end is fixed on the described connector, and moves towards to extend and be fixed at user mode lower edge beam.
2. steel wire body pre-stress stretching device according to claim 1 is characterized in that:
Described vertical hole is a unthreaded hole, and adaptably, screw mandrel is connected with described backing plate by adjusting nut (2).
3. steel wire body pre-stress stretching device according to claim 1 and 2 is characterized in that: described vertical core is provided with the counterbore (10) corresponding to vertical bolt spiral shell head or nut.
4. steel wire body pre-stress stretching device according to claim 3 is characterized in that: described vertical core has two, and two vertical core branches occupy both sides, described vertical hole.
5. steel wire body pre-stress stretching device according to claim 4, it is characterized in that: the position that described connector is connected with described screw mandrel is one blind hole (12), and bottom blind silk hole, having through hole (13) with extending, this through-hole aperture is less than blind silk hole path.
6. steel wire body pre-stress stretching device according to claim 5 is characterized in that: there is hot galvanized layer on this tensioning equipment surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202806861U CN201843088U (en) | 2010-08-04 | 2010-08-04 | Steel wire prestress tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202806861U CN201843088U (en) | 2010-08-04 | 2010-08-04 | Steel wire prestress tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843088U true CN201843088U (en) | 2011-05-25 |
Family
ID=44037983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202806861U Expired - Lifetime CN201843088U (en) | 2010-08-04 | 2010-08-04 | Steel wire prestress tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201843088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152312A (en) * | 2021-04-19 | 2021-07-23 | 南京润华建设集团有限公司 | External prestress reinforcing structure of bent cap |
-
2010
- 2010-08-04 CN CN2010202806861U patent/CN201843088U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152312A (en) * | 2021-04-19 | 2021-07-23 | 南京润华建设集团有限公司 | External prestress reinforcing structure of bent cap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110525 |
|
| CX01 | Expiry of patent term |