CN201133086Y - Prestressing force beam string stretching device - Google Patents
Prestressing force beam string stretching device Download PDFInfo
- Publication number
- CN201133086Y CN201133086Y CNU2007201906254U CN200720190625U CN201133086Y CN 201133086 Y CN201133086 Y CN 201133086Y CN U2007201906254 U CNU2007201906254 U CN U2007201906254U CN 200720190625 U CN200720190625 U CN 200720190625U CN 201133086 Y CN201133086 Y CN 201133086Y
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- holes
- reaction frame
- jiaos
- holder
- dowel bars
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Abstract
The utility model relates to a prestressing string beam tensioning device which comprises a counterforce frame, four dowel steels which are parallel mutually, a jack, a supporting chock block and a permanent seat, wherein, the lower ends of the four dowel steels are connected with the counterforce frame,the connection line of the four joint points is of a rectangle, and the upper ends of the four dowel steels are connected with the permanent seat; the support chock block is formed by fixedly connecting two supporting plates through bolts and nuts, the two supporting plates are respectively provided with two longitudinal grooves, after the two supporting plates are fixedly connected, the four longitudinal grooves form a stepped hole composed of a cylindrical hole and a conical bore, and the diameter of the cylindrical hole is smaller than the minimum diameter of the conical bore; the jack is arranged between the counterforce frame and the supporting chock block. The prestressing string beam tensioning device of the utility model is applicable to the conditions that a tensioning end head is arranged in the middle of an upper chord reinforcing beam of a string beam, the stress condition of the upper chord reinforcing beam is not influenced when in tension, and the tensile force of a lower chord large rope can be still conveniently adjusted after a project is finished.
Description
Technical field
The utility model belongs to the building structure technology field, refers to a kind of prestressing force beam string structure stretching device that the stretch-draw end is arranged at the reinforcing beam middle part that is used for especially.
Background technology
Public and the industrial construction of field of civil engineering large span, huge pillar net such as large-scale stadium, conference and exhibition center, waiting hall for airplanes etc. are more and more at present, since the tension string beam structure integrated application the high and high advantage of flexible member tensile strength of stiffening member bending rigidity, can accomplish that dead load is lighter relatively, the rigidity and the shape stability of system are relatively large, thereby can cross over very big space, so the application in this type of building more and more widely.The general string beam of opening is made up of the reinforcing beam that winds up, strut and two last quarter ropes that be arranged in parallel, and the last quarter rope stretch-draw end in the tension string beam structure form is general all in the termination of winding up reinforcing beam at present, and the stretch-draw frock adopts the spike formula, handles than being easier to.But the consideration of some string beams for architectural effect arranged, the stretch-draw end of last quarter rope is not arranged on the termination of the reinforcing beam that winds up, and be arranged on the beam body bottom, middle part of the reinforcing beam that winds up, if adopt traditional stretch-draw frock just to be difficult under unsettled condition, realize the stretch-draw of last quarter rope, and the reinforcing beam that winds up need be as the load parts in the stretching process, and this can bring adverse effect to structural safety; And spread roofing element on the construction end posttension string beam, and but can't adjust the stress of last quarter rope owing to reasons such as last quarter rope are loose in the future, there is potential safety hazard in structure.
The utility model content
The purpose of this utility model provides a kind of prestressing force beam string structure stretching device that is applicable to the stretch-draw termination at the middle part of the reinforcing beam that winds up of opening the string beam, do not influence the reinforcing beam stressing conditions that winds up during stretch-draw, and still can regulate the tension force of last quarter rope easily after the engineering completion.
For achieving the above object, the utility model is taked following design scheme:
Prestressing force beam string structure stretching device is characterized in that, it comprises: reaction frame, four dowel bars that are parallel to each other, jack, support limit stop and holders; The lower end of four dowel bars be connected with described reaction frame and the line of four points of connection rectangular, the upper end of four dowel bars is connected with described holder; Described support limit stop is formed by fixedly connecting by bolt and nut by two gripper shoes, have two longitudinal flutings on two gripper shoes respectively, these four shoulder holes that longitudinal flutings formation one is made up of cylindrical hole and conical bore after two gripper shoes are fixedly connected, the diameter of cylindrical hole is less than the minimum diameter of conical bore; Described jack is between described reaction frame and support limit stop.
Four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is the screwed reinforcing bars in two ends, four through holes and lower nut that described reaction frame is passed in the lower end of four described dowel bars are spirally connected, and four through holes and top nut that described holder is passed in the upper end of four described dowel bars are spirally connected.
Four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is a steel hinge line, four through holes that described reaction frame is passed in the lower end of four described dowel bars are fixedlyed connected with Extrusion anchor ground tackle, and four through holes that described holder is passed in the upper end of four described dowel bars are fixedlyed connected with the intermediate plate ground tackle.
Four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is a steel hinge line, four through holes that described reaction frame is passed in the lower end of four described dowel bars are fixedlyed connected with the intermediate plate ground tackle, and four through holes that described holder is passed in the upper end of four described dowel bars are fixedlyed connected with Extrusion anchor ground tackle.
The top of described reaction frame has an annular lug for location, described jack bottom, and the bottom of two described gripper shoes has a semi-round ring shape projection respectively, and fixedly connected latter two semi-round ring shape projection of two described gripper shoes forms a whole ring form projection.
The utility model has the advantages that: the utility model prestressing force beam string structure stretching device is owing to adopt above design scheme, during installation, holder is fixedly connected on a bottom of the reinforcing beam of string beam, support limit stop is enclosed within by shoulder hole on two last quarter ropes of a string beam and with the anchor head clamping mutually of last quarter rope; During stretch-draw, the anchor head that jack promotes two last quarter ropes of support limit stop drive moves outward, reach simultaneously and apply prestressed purpose to last quarter rope, stretch-draw finishes the stretch-draw end of last quarter rope is fixedlyed connected with holder (being connected between the stretch-draw end of last quarter rope and the holder removably connecting of routine), reaction frame, dowel bar, jack and support limit stop is unloaded to get final product again.If last quarter rope can be installed reaction frame, dowel bar, jack and support limit stop after loose more in the future, pull down being connected of stretch-draw end and holder, carry out stretch-draw again, after the stretch-draw stretch-draw end of last quarter rope retightened with holder and be connected.This shows, the utility model prestressing force beam string structure stretching device, easy installation and removal, more convenient to the stretch-draw of last quarter rope, also be convenient in the future the prestressed adjustment of last quarter rope, guarantee the safety of structure.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is that the A of Fig. 1 is to structural representation
Fig. 3 is a support limit stop structural representation in the utility model
Fig. 4 is the plan structure schematic diagram of Fig. 3
Fig. 5 is a reaction frame structural representation in the utility model
Fig. 6 is the right TV structure schematic diagram of Fig. 5
The specific embodiment
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the utility model prestressing force beam string structure stretching device is characterized in that, it comprises: reaction frame 1, four dowel bars that are parallel to each other 2, jack 3, support limit stop 4 and holders 5; The lower end of four dowel bars 2 be connected with reaction frame 1 and the line of four points of connection rectangular, the upper end of four dowel bars 2 is connected with holder 5; Support limit stop 4 is formed by fixedly connecting by bolt and nut by two gripper shoes 6,7, have two longitudinal flutings respectively on two gripper shoes 6,7, these four longitudinal flutings formed shoulder holes 8 of being made up of cylindrical hole and conical bore after two gripper shoes 6,7 were fixedly connected, and the diameter of cylindrical hole is less than the minimum diameter of conical bore; Jack 3 is between reaction frame 1 and support limit stop 4.
Gripper shoe 6,7 is provided with handle 14,15.
During installation, holder 5 is fixedly connected on a bottom of the reinforcing beam of string beam 11, support limit stop 4 be enclosed within by shoulder hole 8 on two last quarter ropes 12 of a string beam and with anchor head 13 clamping mutually of last quarter rope 12.During stretch-draw, the anchor head 13 that jack 3 promotes two last quarter ropes 12 of support limit stop 4 drives moves outward, reach and apply prestressed purpose for simultaneously last quarter rope 12, stretch-draw finishes the stretch-draw end of last quarter rope 12 is fixedlyed connected with holder 5 (being connected between the stretch-draw end of last quarter rope 12 and the holder 5 removably connecting of routine), reaction frame 1, dowel bar 2, jack 3 and support limit stop 4 is unloaded to get final product again.If last quarter rope 12 can be installed reaction frame 1, dowel bar 2, jack 3 and support limit stop 4 after loose more in the future, pull down the last quarter rope stretch-draw end of a string beam and being connected of holder 5, again carry out stretch-draw, after the stretch-draw stretch-draw end of last quarter rope 12 retightened with holder 5 and be connected.This shows, the utility model prestressing force beam string structure stretching device, easy installation and removal, more convenient to the stretch-draw of last quarter rope 12, also be convenient in the future last quarter rope 12 prestressed adjustment, guarantee the safety of structure.
Four jiaos of through holes 16 that are provided with four rectangular distributions of reaction frame 1, four jiaos of through holes that are provided with four rectangular distributions of holder 5, dowel bar 2 is the screwed reinforcing bars in two ends, four through holes 16 that reaction frame 1 is passed in the lower end of four dowel bars 2 are spirally connected with lower nut, and four through holes and top nut that holder 5 is passed in the upper end of four dowel bars 2 are spirally connected.
Four jiaos of through holes 16 that are provided with four rectangular distributions of reaction frame 1, four jiaos of through holes that are provided with four rectangular distributions of holder 5, dowel bar 2 is a steel hinge line, four through holes 16 that reaction frame 1 is passed in the lower end of four dowel bars 2 are fixedlyed connected with Extrusion anchor ground tackle, and four through holes that holder 5 is passed in the upper end of four dowel bars 2 are fixedlyed connected with the intermediate plate ground tackle.
Four jiaos of through holes 16 that are provided with four rectangular distributions of reaction frame 1, four jiaos of through holes that are provided with four rectangular distributions of holder 5, dowel bar 2 is a steel hinge line, four through holes 16 that reaction frame 1 is passed in the lower end of four dowel bars 2 are fixedlyed connected with the intermediate plate ground tackle, and four through holes that holder 5 is passed in the upper end of four dowel bars 2 are fixedlyed connected with Extrusion anchor ground tackle.
The top of reaction frame 1 has an annular lug 9 for location, jack 3 bottoms, the bottom of two gripper shoes 6,7 has a semi-round ring shape projection 10, two gripper shoes 6,7 fixedly connected latter two semi-round ring shape projections 10 respectively and forms a whole ring form projection for location, jack 3 tops.
Claims (5)
1, prestressing force beam string structure stretching device is characterized in that, it comprises: reaction frame, four dowel bars that are parallel to each other, jack, support limit stop and holders; The lower end of four dowel bars be connected with described reaction frame and the line of four points of connection rectangular, the upper end of four dowel bars is connected with described holder; Described support limit stop is formed by fixedly connecting by bolt and nut by two gripper shoes, have two longitudinal flutings on two gripper shoes respectively, these four shoulder holes that longitudinal flutings formation one is made up of cylindrical hole and conical bore after two gripper shoes are fixedly connected, the diameter of cylindrical hole is less than the minimum diameter of conical bore; Described jack is between described reaction frame and support limit stop.
2, prestressing force beam string structure stretching device according to claim 1, it is characterized in that: four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is the screwed reinforcing bars in two ends, four through holes and lower nut that described reaction frame is passed in the lower end of four described dowel bars are spirally connected, and four through holes and top nut that described holder is passed in the upper end of four described dowel bars are spirally connected.
3, prestressing force beam string structure stretching device according to claim 1, it is characterized in that: four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is a steel hinge line, four through holes that described reaction frame is passed in the lower end of four described dowel bars are fixedlyed connected with Extrusion anchor ground tackle, and four through holes that described holder is passed in the upper end of four described dowel bars are fixedlyed connected with the intermediate plate ground tackle.
4, prestressing force beam string structure stretching device according to claim 1, it is characterized in that: four jiaos of through holes that are provided with four rectangular distributions of described reaction frame, four jiaos of through holes that are provided with four rectangular distributions of described holder, described dowel bar is a steel hinge line, four through holes that described reaction frame is passed in the lower end of four described dowel bars are fixedlyed connected with the intermediate plate ground tackle, and four through holes that described holder is passed in the upper end of four described dowel bars are fixedlyed connected with Extrusion anchor ground tackle.
5, according to claim 1 or 2 or 3 or 4 described prestressing force beam string structure stretching devices, it is characterized in that: the top of described reaction frame has an annular lug for location, described jack bottom, the bottom of two described gripper shoes has a semi-round ring shape projection respectively, and fixedly connected latter two semi-round ring shape projection of two described gripper shoes forms a whole ring form projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201906254U CN201133086Y (en) | 2007-12-06 | 2007-12-06 | Prestressing force beam string stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201906254U CN201133086Y (en) | 2007-12-06 | 2007-12-06 | Prestressing force beam string stretching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201133086Y true CN201133086Y (en) | 2008-10-15 |
Family
ID=40061359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201906254U Expired - Lifetime CN201133086Y (en) | 2007-12-06 | 2007-12-06 | Prestressing force beam string stretching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201133086Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790575A (en) * | 2015-04-21 | 2015-07-22 | 张跃 | Prestressed floor slab |
-
2007
- 2007-12-06 CN CNU2007201906254U patent/CN201133086Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790575A (en) * | 2015-04-21 | 2015-07-22 | 张跃 | Prestressed floor slab |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071206 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |