CN102296826A - Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope - Google Patents
Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope Download PDFInfo
- Publication number
- CN102296826A CN102296826A CN2011101523008A CN201110152300A CN102296826A CN 102296826 A CN102296826 A CN 102296826A CN 2011101523008 A CN2011101523008 A CN 2011101523008A CN 201110152300 A CN201110152300 A CN 201110152300A CN 102296826 A CN102296826 A CN 102296826A
- Authority
- CN
- China
- Prior art keywords
- steel strand
- pressure sensor
- steel stranded
- stretch
- draw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a dual-pressure sensor rising and tensioning method of a steel stranded wire stay rope, which comprises the steps of: clustering a first pressure sensor, an anchor ring of a one-hole wedge-type anchorage, a tool oppressor and a handheld type jack on a first tensioned steel stranded wire, tensioning the first steel stranded wire and enabling the internal force of the first steel stranded wire to reach the designed value, anchoring the first steel stranded wire on the anchor ring of the one-pore anchorage, then clustering the tool oppressor, a second pressure sensor and the handheld type jack on a second steel stranded wire, tensioning the second steel stranded wire, and when readings of the two pressure sensors are equal, anchoring the second steel stranded wire on the anchor ring of the anchorage; and tensioning rest steel stranded wires one by one and anchoring according to the tensioning procedure of the second steel stranded wire, and then repeating the tensioning procedure on the stay rope to ensure that the internal forces of the steel stranded wires gradually raise and the reading of the first pressure sensor is equal to or close to the designed value of the internal forces of the steel stranded wires. The invention ensures uniform stress of the cabled steel stranded wires.
Description
Technical field
The present invention relates to a kind of construction technology of large-scale stayed structure, relate in particular to the construction technology of a kind of employing by the guy of twisted steel cable of root stretch-draw.
Background technology
Drag-line is widely used in each engineering field because of it from advantages such as heavy and lights, for the large-scale guy of twisted steel cable structure in fields such as bridge, because the power that drag-line bears is very big, can't carry out integral tension, adopts the construction technology of by stages pursuing root stretch-draw steel strand usually.Yet in most cases, the bearing at guy anchor fixed end place is generally elastic body, adopt drag-line construction technology by root stretch-draw steel strand, because the steel strand of a back stretch-draw can make elastic support be subjected to displacement, thereby the steel strand that cause stretch-draw to finish are lax, if the unbalanced stress of each root steel strand is even in the drag-line, so under load action, may make a part be in stressed its ultimate strength that surpasses of the steel strand of higher stress level, thereby make these steel strand take the lead in rupturing, external loads just all is applied on the residue steel strand like this, if the initial tension stress of residue steel strand is still inhomogeneous, phenomenon of rupture then can repeat so, and is destroyed until stayed structure.Under the impact load effect, this situation may be more outstanding.Therefore, in the stretching construction process of stayed structure, each root steel strand is stressed even, significant in the control drag-line.
In the stretching construction of guy of twisted steel cable, usually adopt the method for equivalent stretch-draw: first steel strand of pretensioning and anchoring, second steel strand of stretch-draw then, when the internal force of second steel strand equates with the internal force of first steel strand, then stop second steel strand of stretch-draw and anchoring, the 3rd steel strand of stretch-draw when the internal force of the 3rd steel strand equates with the internal force of first steel strand, then stop stretch-draw the 3rd steel strand and anchoring again.Because after second steel strand tension finishes, the internal force of preceding two steel strand equates, and caused bearing elastic displacement is identical to the internal force influence of preceding two steel strand during the 3rd steel strand of stretch-draw, thereby after the 3rd steel strand tension finished, the internal force of three steel strand equated.And the like, after last root steel strand tension finished, the internal force of all steel strand all equated, has so just finished the first phase stretching construction of drag-line, and had guaranteed that each root steel strand that stretching construction finishes in the backstay are stressed evenly.
Yet, the stretching construction of the guy of twisted steel cable in present most of engineering structures, engineers and technicians are usually according to the whole drag-line Construction Plan of stretch-draw by stages, the internal force design load of steel strand after determining each phase stretching construction and finishing, utilize rigidity of structure calculated value then, according to equivalent stretch-draw principle the stretching force calculated in advance of each the root steel strand in each phase inhaul is come out, according to these calculated values each root steel strand is pursued root stretch-draw again, attempt stretching construction in the disposable current period of finishing drag-line.Like this, inaccurate if the rigidity of structure is calculated, will cause the calculating of each root steel twisted-line tension-force in the drag-line inaccurate, and then cause finish each root steel strand discontinuity in the backstay of stretching construction.In fact, because most of engineering structuress have the geometry scrambling etc. of non-linear, the structural element of material usually, thereby the rigidity of structure is difficult to accurate calculating usually, such as factors such as crackings under the reinforced concrete member load, therefore the rigidity of structure value of being calculated is difficult to the accurate response architectural feature usually in addition.Because construction technical staff (designer who comprises engineering structures), the theory analysis work of engineering structures feature affects factor is unfamiliar with usually, thereby to its constructure scheme of taking, usually the theory analysis of this respect in addition not.In this sense, those utilize rigidity of structure calculated value to carry out the guy of twisted steel cable of stretching construction at present, and each root steel strand is stressed and inhomogeneous in the one-tenth rope backstay, and these structure hidden danger should cause our abundant attention.
Summary of the invention
The present invention is directed to the shortcoming and defect part that exists in the existing guy of twisted steel cable construction technology, proposed a kind of soaring method for stretching of dual pressure sensor of guy of twisted steel cable.Solving the technical scheme that its key technical problem adopts is:
Thoroughly abandon dependence, increase by two pressure sensors, a single hole clip type anchorage tool and an instrument top pressing device rigidity of structure calculated value.According to the whole drag-line Construction Plan of stretch-draw by stages, the internal force design load of steel strand after determining each phase stretching construction earlier and finishing to the stretching construction of drag-line, further was subdivided into more phases to finish in each phase.And in the phase of each segmentation, at first first steel strand tension arrived according to whole drag-line current period steel strand internal force design load by stages, since second steel strand tension, all the time according to equivalent stretch-draw principle steel strand are pursued root stretch-draw, and finish the stretching construction of all steel strand in this segmentation phase.Repeat the stressing sequence of the drag-line in the previous segmentation phase, then can finish the stretching construction of the next one in the segmentation phase of drag-line, so repetitive operation, so whenever, after finishing the stretching construction in the segmentation phase, the internal force of steel strand will progressively " rise ", and can progressively approach according to whole drag-line current period steel strand internal force design load by stages.After if the stretching construction in some segmentation phases finishes, the internal force of the steel strand of first stretch-draw equals or approaches then to stop the current period stretching construction of drag-line according to whole drag-line current period by stages during steel strand internal force design load.Repeat the stressing sequence of preceding first phase drag-line, then can finish the following first phase stretching construction of drag-line, until the stretching construction of finishing whole drag-line.
Constructure scheme in each segmentation phase is: earlier anchor ring, instrument top pressing device and the hand-held jack of first pressure sensor, single hole clip type anchorage tool are gone here and there in order on first steel strand, first steel strand of stretch-draw, its internal force is reached according to whole drag-line current period steel strand internal force design load by stages, first steel strand is anchored on the anchor ring of single hole moveable anchor, pull down jack and instrument top pressing device from first steel strand, prepare the stretch-draw operation of next root steel strand.Then instrument top pressing device, second pressure sensor and hand-held jack are gone here and there in order on second steel strand, second steel strand of stretch-draw, when the reading of the reading of second pressure sensor and first pressure sensor equates, second steel strand is anchored on the anchor ring of work anchor, pull down jack, second pressure sensor and instrument top pressing device, the stretch-draw operation of preparing next root steel strand from second steel strand.Afterwards, according to the tension process of second steel strand by all the other steel strand of root stretch-draw, until the stretching construction of finishing all steel strand in this segmentation phase.
For convenience in constructing operation, improve efficiency of construction, can be by setting up a control circuit that has buzzer, output signal size to two pressure sensors compares, when the output signal equal and opposite in direction of two pressure sensors, then sound a buzzer, the constructor then stops tension operation after hearing buzzer.Although the design of this control circuit is very simple, yet emphasis of the present invention does not lie in this, so the present invention does not have this control circuit of specific design, thereby the design of this control circuit does not belong to content of the present invention.
The invention has the beneficial effects as follows: guaranteed to become the stressed uniformity of each root steel strand in the rope backstay, abandoned dependence, can improve efficiency of construction by setting up a control circuit that has buzzer to rigidity of structure calculated value.
Description of drawings
Fig. 1 is the schematic diagram of the soaring method for stretching of dual pressure sensor of guy of twisted steel cable of the present invention.
Among the figure: " 1 " is first pressure sensor; " 2 " are second pressure sensor; " 3 " are the anchor ring of single hole clip type anchorage tool; " 4 " are the intermediate plate of single hole clip type anchorage tool; " 5 " are the hand-held jack; " 6 " are the instrument top pressing device; " 7 " are for having the control circuit of buzzer; " 8 " are steel strand; " 9 " are the intermediate plate of work anchor; " 10 " are the threaded anchor ring of work anchor; " 11 " are the round nut of work anchor; " 12 " are the adjustment backing plate of work anchor; " 13 " are the backing plate of work anchor.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
A kind of dual pressure sensor of guy of twisted steel cable method for stretching that rises, this method comprises the steps:
As shown in Figure 1, prepare two pressure sensors (among Fig. 1 " 1 " and " 2 "), a single hole clip type anchorage tool (forming) and a hand-held jack (among Fig. 1 " 5 ") by " 3 " among Fig. 1 and " 4 ", adopt high-strength steel to make an instrument top pressing device (among Fig. 1 " 6 "), wherein, pressure sensor can adopt shake profound formula or fiber Bragg grating type anchor dynamometer (shake profound formula anchor dynamometer or BGK-FBG-4900 type fiber Bragg grating type anchor dynamometer of the BGK-4900 type produced of Beijing JiKang Science Co., Ltd for example, the pressure sensor of employing different model only relates to the design difference of the control circuit that has buzzer), the making of instrument top pressing device can be to make (the preceding cassette jack of the YDQ type that for example adopts the Liuzhou VLM Prestressing Co., Ltd to produce, the making of instrument top pressing device can be made with reference to cassette jack annex before the YDQ type of this manufacturer production so) by hand-held jack manufacturer band.According to the whole drag-line Construction Plan of stretch-draw by stages, the internal force design load of steel strand after determining each phase stretching construction and finishing.Earlier with first pressure sensor (among Fig. 1 " 1 "), the anchor ring of single hole clip type anchorage tool (among Fig. 1 " 3 "), instrument top pressing device (among Fig. 1 " 6 ") and hand-held jack (among Fig. 1 " 5 ") are gone here and there in order on first steel strand (among Fig. 1 " 8 "), first steel strand of stretch-draw then, its internal force is reached according to whole drag-line current period steel strand internal force design load by stages, and first steel strand is anchored on the anchor ring (among Fig. 1 " 3 ") of single hole moveable anchor with intermediate plate (among Fig. 1 " 4 "), at last hand-held jack and instrument top pressing device are pulled down from first steel strand, in order to the stretch-draw operation of next root steel strand.Again with the instrument top pressing device, second pressure sensor (among Fig. 1 " 2 ") and hand-held jack are gone here and there in order on second steel strand, and the output line of first pressure sensor and the output line of second pressure sensor be connected with control circuit (among Fig. 1 " 7 "), second steel strand of stretch-draw then, when hearing that control circuit is sounded a buzzer, then stop tension operation, and second steel strand is anchored on the anchor ring (among Fig. 1 " 10 ") of work anchor with intermediate plate (among Fig. 1 " 9 "), at last with the hand-held jack, second pressure sensor and instrument top pressing device are pulled down from second steel strand, in order to the stretch-draw operation of next root steel strand.Afterwards, according to the tension process of second steel strand by all the other steel strand of root stretch-draw, until the stretching construction of finishing all steel strand in this segmentation phase.Repeat the stressing sequence of the drag-line in the previous segmentation phase, then can finish the stretching construction of the next one in the segmentation phase of drag-line, so repetitive operation, so whenever, after finishing the stretching construction in the segmentation phase, the internal force of steel strand will progressively " rise ", and can progressively approach according to whole drag-line current period steel strand internal force design load by stages.After if the stretching construction in a certain segmentation phase finishes, the reading of first pressure sensor equals or approaches then to stop the current period stretching construction of drag-line according to whole drag-line current period by stages during steel strand internal force design load.Afterwards, repeat the stressing sequence of preceding first phase drag-line, then can finish the following first phase stretching construction of drag-line, until the stretching construction of finishing whole drag-line.Pull down anchor ring and first pressure sensor of single hole clip type anchorage tool at last from the steel strand of first stretch-draw, and the internal force of steel strand is stretched to design load again.
Claims (1)
1. the soaring method for stretching of the dual pressure sensor of a guy of twisted steel cable, it is characterized in that: earlier with first pressure sensor, the anchor ring of single hole clip type anchorage tool, instrument top pressing device and hand-held jack are gone here and there in order on the steel strand of first stretch-draw, first steel strand of stretch-draw also make its internal force reach design load, first steel strand is anchored on the anchor ring of single hole clip type anchorage tool, pull down jack and instrument top pressing device from first steel strand, then with the instrument top pressing device, second pressure sensor and hand-held jack are gone here and there in order on second steel strand, second steel strand of stretch-draw, when the reading of two pressure sensors equates, second steel strand is anchored on the anchor ring of work anchor, pull down jack from second steel strand, second pressure sensor and instrument top pressing device, again according to the flow chart of second steel strand of stretch-draw, by root stretch-draw residue steel strand and anchoring, afterwards to the above-mentioned stressing sequence of drag-line repetitive operation, the internal force of steel strand progressively " is risen ", and the reading that makes first pressure sensor equals or approaches the design load of steel strand internal force, pull down anchor ring and first pressure sensor of single hole clip type anchorage tool at last from the steel strand of first stretch-draw, the internal force of steel strand is stretched to design load again, and is anchored on the anchor ring of work anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101523008A CN102296826A (en) | 2011-06-08 | 2011-06-08 | Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101523008A CN102296826A (en) | 2011-06-08 | 2011-06-08 | Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102296826A true CN102296826A (en) | 2011-12-28 |
Family
ID=45357482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101523008A Pending CN102296826A (en) | 2011-06-08 | 2011-06-08 | Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102296826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456449A (en) * | 2020-04-16 | 2020-07-28 | 中建四局第六建设有限公司 | Construction device and method for guaranteeing uniform stress of each bundle of steel strands through beam body post-tensioning method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737312A (en) * | 2004-08-19 | 2006-02-22 | 王继成 | Multi-roof synchronous stretching construction method for prestressed beam |
| CN101710011A (en) * | 2009-12-16 | 2010-05-19 | 中铁大桥局股份有限公司 | Method for testing and monitoring cable force of PC steel strand stay cable |
| CN101793094A (en) * | 2010-03-11 | 2010-08-04 | 潮峰钢构集团有限公司 | Multiple suspended truss gradual tensioning construction method |
| CN101989092A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Wireless control system and method for multipoint prestress synergic tensioning |
| CN101989091A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Prestress automatic tensioning control system and method |
-
2011
- 2011-06-08 CN CN2011101523008A patent/CN102296826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737312A (en) * | 2004-08-19 | 2006-02-22 | 王继成 | Multi-roof synchronous stretching construction method for prestressed beam |
| CN101989092A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Wireless control system and method for multipoint prestress synergic tensioning |
| CN101989091A (en) * | 2009-07-31 | 2011-03-23 | 中国建筑第八工程局有限公司 | Prestress automatic tensioning control system and method |
| CN101710011A (en) * | 2009-12-16 | 2010-05-19 | 中铁大桥局股份有限公司 | Method for testing and monitoring cable force of PC steel strand stay cable |
| CN101793094A (en) * | 2010-03-11 | 2010-08-04 | 潮峰钢构集团有限公司 | Multiple suspended truss gradual tensioning construction method |
Non-Patent Citations (2)
| Title |
|---|
| 张育智等: "宜宾中坝金沙江大桥索力控制研究", 《铁道标准设计》 * |
| 郑启德等: "漳州战备大桥斜拉索挂设", 《桥梁建设》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456449A (en) * | 2020-04-16 | 2020-07-28 | 中建四局第六建设有限公司 | Construction device and method for guaranteeing uniform stress of each bundle of steel strands through beam body post-tensioning method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103234902B (en) | Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state | |
| CN106610357B (en) | A kind of measuring method of metal material yield surface | |
| CN204920237U (en) | Push -pull system is opened to prestressing force intelligence | |
| CN107655755B (en) | Testing method for anti-sliding bearing capacity of stay cable-cable clamp assembly part | |
| CN101775906A (en) | Construction stretching control method used for spoke type roof structure | |
| CN204112229U (en) | Post stretching precast beam tension stress control device | |
| CN106368381A (en) | Flexural member, manufacturing method, building crack repair system and using method | |
| CN104816381A (en) | Prestressed concrete construction technology for embedded-type shape memory alloy ribs | |
| CN109750599B (en) | Slow-bonding low-retraction prestressed short cable system and calculation and tensioning methods | |
| Wang et al. | Cyclic behavior of T-stub connection to hollow section steel column using TSOBs | |
| KR101546213B1 (en) | The testbed for measuring tensile force and the measuring method thereof | |
| CN103234685B (en) | Snap ring type anchorage force measuring device | |
| CN102296826A (en) | Dual-pressure sensor rising and tensioning method of steel stranded wire stay rope | |
| CN102261983B (en) | Method for synchronously measuring structural rigidity in guy cable structure construction | |
| CN106769564A (en) | A kind of drag-line fatigue tester | |
| CN210439165U (en) | Prestressed carbon fiber tensioning device | |
| CN203191293U (en) | Bonding performance test device for FRP (Fiber Reinforced Plastic) rib and concrete under complex stress state | |
| CN204903362U (en) | Modified survey fibre - concrete interface bond property's testing arrangement | |
| CN208934433U (en) | A kind of steel strand prestress tensioning equipment | |
| CN108151939A (en) | The method of test existing structure prestress value based on deformation and tensile relationship curve | |
| CN204302118U (en) | A kind of expansive concrete tensile creep test device | |
| CN207540566U (en) | Anchor pole intelligent detection device in building body | |
| CN203224318U (en) | Split ring type anchorage force measurement device | |
| CN106352808B (en) | A kind of device that laboratory is deformed with measurement cement-base composite material test specimen | |
| CN110847040A (en) | Intelligent equal-tension system of magnetic flux sensor and operation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111228 |