CN102535272B - Construction method for post-stretched pre-stress longitudinal connection of road bed track slabs - Google Patents
Construction method for post-stretched pre-stress longitudinal connection of road bed track slabs Download PDFInfo
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- CN102535272B CN102535272B CN201210001560.XA CN201210001560A CN102535272B CN 102535272 B CN102535272 B CN 102535272B CN 201210001560 A CN201210001560 A CN 201210001560A CN 102535272 B CN102535272 B CN 102535272B
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Abstract
The invention discloses a construction method for post-stretched pre-stress longitudinal connection of road bed track slabs, and belongs to the technology of post-stretched pre-stress longitudinal connection of the road bed track slabs. The construction method comprises the following steps: 1, numbering slab joints and marking pre-stress steel bars; 2, mounting clamping nuts on pre-stressed reinforcement bars of a No. 0 slab joint, a No. 3 slab joint, a No. 6 slab joint and a No. 9 slab joint; 3, mounting collet connectors on a No. 8 slab joint, a No. 7 slab joint, a No. 6 slab joint, a No. 5 slab joint, No. 4 slab joint, a No. 3 slab joint, a No. 2 slab joint and a No. 1 slab joint sequentially; 4, screwing the collet connectors to stretch pre-buried pre-stressed steel bars on the track slabs; and 5, welding shearing plates at the ends of the track slabs. The construction method has the advantages that the operation is simple and convenient; the implement is easy; the service life is long; the track slabs and the joints thereof can be prevented from cracking effectively; the pre-stressed steel bars in the track slabs can be stretched longitudinally; and positive and negative threads are formed at the ends of the steel bars, so that the pre-stressed steel bars can be screwed into the centers of the collet connectors till the design requirements on torque force are met.
Description
Technical field
The present invention relates to the longitudinal link technique of roadbed track plates post-tensioned prestressing, the longitudinal connection construction method of especially a kind of roadbed track plates post-tensioned prestressing.
Background technology
Become to fill with railroad track engineering according to the general thought of " roadbed is vertical to be connected, bridge on unit ", drawn the advantage of plate-type ballastless track and double-block type ballastless track, proposed the longitudinally CRTS III plate-type non-fragment orbit of connection of roadbed location.Precast plate---speed of application is fast for the employing of CRTS III plate-type non-fragment orbit, and track does not ftracture, long service life; Adopt continuous structure---track good integrity.Different according to track plates connected mode, roadbed location CRTS III plate-type non-fragment orbit has that post-tensioned prestressing longitudinally connects, common longitudinal connection and modular (self-compacting concrete is longitudinally continuous) three kinds of structural shapes.The longitudinal connected system of post-tensioned prestressing by special connector linking, forms compressive pre-stress by longitudinal prestressing without bondn rod iron of track plates on several track plates that are cascaded, and can effectively prevent gaping of joints between track plates and plate.After prestressed stretch-draw completes, pour into again self-compacting concrete, form complete post-tensioned prestressing longitudinally-connected plated construction.Potting resin mortar between plate, because resin mortar modulus of elasticity is less, plate seam place structure a little less than, in order to prevent that under High-speed Train Loads, two plates are staggered, at plate end, be also provided with connecting board structure, for shearing between transmission plate, strengthening plate end connects.
Summary of the invention
Goal of the invention of the present invention is: for the problem of above-mentioned existence, provide a kind of easy and simple to handle, be easy to implement, can effectively prevent the longitudinal connection construction method of roadbed track plates post-tensioned prestressing of gaping of joints between track plates and plate, this construction method, by sleeve coupler, the built-in prestressed steel bar of track plates is carried out to longitudinal stretch-draw, there is positive and negative silk rod iron termination, make prestressed steel bar toward the precession of sleeve coupler central authorities, until torsion reaches designing requirement value, by oil, push up check, guarantee longitudinal quality of connection, welded plate end shear plate is installed simultaneously, is made its life-span permanent.
The technical solution used in the present invention is as follows:
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, adopts following steps to realize:
Step 1, to the plate seam numbering of 9 track plates and the stretch-draw position mark of prestressed steel bar;
Step 2 is installed clamp nut on 0#, 3#, 6# and 9# plate seam prestressed reinforcement;
Step 3, successively at 8#, 7# to 1# plate seam place installing sleeve connector;
Step 4, is realized the pre-buried prestressed steel bar of track plates is carried out to stretch-draw by knob sleeve coupling sleeve;
Step 5, welded rails plate plate end shear plate.
Owing to having adopted said method, using 9 blocks of longitudinal joining rails plates of roadbed track plates post-tensioned prestressing as a longitudinal linkage unit, by sleeve coupler, the built-in prestressed steel bar of track plates is carried out to longitudinal stretch-draw, there is positive and negative silk prestressed steel bar termination, and sleeve coupler, by turn-knob, makes prestressed steel bar toward the precession of sleeve coupler central authorities, until torsion reaches designing requirement value, by oil, push up check, guarantee longitudinal stretch-draw quality of connection, after stretch-draw completes, carry out shear plate welded and installed.By sleeve coupler, the built-in prestressed steel bar of track plates is carried out to longitudinal stretch-draw, there is positive and negative silk rod iron termination, make prestressed steel bar toward the precession of sleeve coupler central authorities, until torsion reaches designing requirement value, by oil, push up check, guarantee longitudinal quality of connection, welded plate end shear plate is installed simultaneously, and the method is easy and simple to handle, is easy to implement, can effectively prevent gaping of joints between track plates and plate, guarantee construction quality.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, in step 1, after track slab precision adjustment completes, in order, using 9 track plates as a tensioned unit, a tensioned unit is along stretching construction direction plate seam, and numbering is followed successively by 9#, 8# ... 0# plate seam; In track plates end, expose the 18mm of prestressed steel bar and the position of 30mm makes a mark.
Owing to having adopted said method, by 9 track plates on same tensioned unit, be numbered, in being convenient at the construction field (site), each tensioned unit is distinguished, can distinguish the track plates on same tensioned unit simultaneously, avoid confusion, and expose on prestressed steel bar and make a mark in track plates end, and this mark is 18mm and 30mm apart from track plates end respectively, thereby can guarantee that the nut on the prestressed steel bar on each unit is identical to the distance of track plates end, realize its prestressing force identical, and stressed even, effectively prevent gaping of joints between track plates and plate.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, in step 2, the prestressed reinforcement at 0#, 3#, 6# and 9# plate seam place is installed to clamp nut, be specially 0# plate seam tail end, 9# plate seam front end, two ends, 3# seam place and two ends, 6# plate seam place, each clamp nut that wherein 3# plate seam and 6# plate stitch, apart from plate groove end face, leave the surplus of 20mm, the clamp nut at 0# plate seam and 9# plate seam place is screwed onto plate end.
Owing to having adopted said method, at 0# plate seam tail end, 9# plate seam front end, clamp nut is installed at two ends, 3# seam place and two ends, 6# plate seam place, require 3# plate seam and the clamp nut at 6# plate seam two ends need leave the surplus of 20mm apart from plate groove end face, for follow-up stretch-draw headspace, being convenient to tension tool is installed on fixing, thereby make easy and simple to handle, at 0# plate seam and 9# plate seam place, clamp nut is screwed to plate end simultaneously, solid nut and the plate end at this place are close to, thereby the structure that can guarantee its prestressed reinforcement is surely leaned on, avoid the distortion of follow-up construction, guarantee normal construction.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, in step 3,1) prestressed steel bar at 8# plate seam place is moved back to 20mm to construction direction top; 2) hold sleeve coupler, by prestressed steel bar precession 3mm; 3) prestressed steel bar at 7# plate seam place is stitched to precession 18mm mark to 8# plate; 4) adopt above-mentioned three one step process to install in turn the sleeve coupler at 7#, 6#, 5# to 1# plate seam place.
Owing to having adopted said method, the construction method of the 8# plate of take seam is basis, by 7#, 6# until 1# sequentially operate, thereby sleeve coupler can be installed, wherein the mounting method at 8# plate seam place is, first the prestressed steel bar at 8# plate seam place is moved back to 20mm to construction direction top, thereby can be convenient to install and fix sleeve coupler, so that the carrying out of construction, secondly, mounting cylinder connector, and grasp sleeve coupler, by prestressed steel bar precession 3mm, avoid sleeve coupler to rotate with prestressed steel bar, finally again the prestressed steel bar at 7# plate seam place is stitched to precession 18mm mark to 8# plate, realize prestressed steel bar fastening at 8# plate seam place, and take the method as reference, successively to 7#, 6# until 1# sequentially operate, thereby can carry out operation in turn to the roadbed track plates on a tensioned unit, realizing the structure of its whole tensioned unit surely leans on, its method is simple, in good order, is convenient to site operation.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, in step 4, at the plate seam place of track plates perfusion resin mortar, resin mortar reaches after design strength, track plates prestressed steel bar is carried out to stretch-draw, with long handle torque spanner clamping sleeve coupler, carry out knob, make both sides prestressed steel bar to the precession 12mm of sleeve coupler central authorities, tension sequence is: the prestressed steel bar of first simultaneous tension 3# and 6# plate seam both sides, the prestressed steel bar of simultaneous tension 1#, 4#, 7# plate seam both sides again, then the prestressed steel bar of stretch-draw 2#, 5#, 8# plate seam both sides; Often complete after single tension, with hydraulic jack, carry out the check to stretching force; After completing stretch-draw, tighten 9 track plates the clamp nut at 3# and 6# plate seam place; Connector and prestressed reinforcement exposed portions serve are loaded onto grease with corrugated hose and are wrapped up.
Owing to having adopted said method, plate seam place to track plates carries out perfusion resin mortar, two adjacent track plates can be connected, when resin mortar reaches after design strength, track plates prestressed steel bar is carried out to stretch-draw, the track plates that can realize on same tensioned unit forms whole stressed, therefore adopt long handle torque spanner clamping sleeve coupler to carry out knob, make both sides prestressed steel bar to the precession 12mm of sleeve coupler central authorities, its concrete stretch-draw means are, the prestressed steel bar of first simultaneous tension 3# and 6# plate seam both sides, simultaneous tension 1# again, 4#, the prestressed steel bar of 7# plate seam both sides, stretch-draw 2# again, 5#, the prestressed steel bar of 8# plate seam both sides, by the stretch-draw of mutual dislocation, make to prestressed steel bar stressed evenly, track plates is stressed evenly, guarantee application life, thereby realize the stretch-draw to both sides prestressed steel bar, the rail plate tension of both sides is reached to same distance, thereby guarantee the stressed even of both sides, guarantee its application life.After each stretch-draw completes, need to carry out the check to stretching force with hydraulic jack, thereby guarantee prestressed steel bar to reach default stress value, thereby guarantee that it reaches the requirement of design, guarantee application life; After completing stretch-draw, tighten 9 track plates the clamp nut at 3# and 6# plate seam place; Connector and prestressed reinforcement exposed portions serve are loaded onto grease with corrugated hose and are wrapped up, and wherein grease is butter, can guarantee that its prestressed reinforcement exposing is subject to the corrosion of the impact of environment, thereby guarantee its application life.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, in step 5, after stretch-draw completes, by movable shear plate and the pre-buried shear plate laminating of track plates, then installs high-strength bolt, and movable shear plate is welded on track plates pre-embedded steel slab; After having welded, shear plate and connector and both sides prestressed reinforcement are wrapped up with sealant tape.
Owing to having adopted said method, the laminating of movable shear plate and the pre-buried shear plate of track plates, high-strength bolt is installed again, again movable shear plate is welded on track plates pre-embedded steel slab, make to be fixedly connected with between movable shear plate and track plates pre-embedded steel slab, its structure is surely leaned on, and used safety, the life-span is permanent; After having welded, shear plate and connector and both sides prestressed reinforcement are wrapped up with sealant tape, avoid it to be subject to environmental corrosion, guarantee its application life
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
1, the longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, easy and simple to handle, is easy to implement, and can effectively prevent gaping of joints between track plates and plate;
2,the longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, by sleeve coupler, the built-in prestressed steel bar of track plates is carried out to longitudinal stretch-draw, there is positive and negative silk rod iron termination, makes prestressed steel bar toward the precession of sleeve coupler central authorities, until torsion reaches designing requirement value;
3,the longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, pushes up check by oil, guarantees longitudinal quality of connection, and welded plate end shear plate is installed simultaneously, makes its life-span permanent.
The specific embodiment
Disclosed all features in this manual, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this manual (comprising any accessory claim, summary), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.That is,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, it adopts following steps to realize:
Step 1, to the plate seam numbering of 9 track plates and the stretch-draw position mark of prestressed steel bar; Be specially: after track slab precision adjustment completes, in order, using 9 track plates as a tensioned unit, a tensioned unit is along stretching construction direction plate seam, and numbering is followed successively by 9#, 8# ... 0# plate seam; In track plates end, expose the 18mm of prestressed steel bar and the position of 30mm makes a mark.
Step 2 is installed clamp nut on 0#, 3#, 6# and 9# plate seam prestressed reinforcement; Be specially: the prestressed reinforcement at 0#, 3#, 6# and 9# plate seam place is installed to clamp nut, be specially 0# plate seam tail end, 9# plate seam front end, two ends, 3# seam place and two ends, 6# plate seam place, each clamp nut that wherein 3# plate seam and 6# plate stitch, apart from plate groove end face, leave the surplus of 20mm, the clamp nut at 0# plate seam and 9# plate seam place is screwed onto plate end face.
Step 3, successively at 8#, 7#, 6#, 5#, 4#, 3#, 2# and 1# plate seam place installing sleeve connector; Be specially: 1) prestressed steel bar at 8# plate seam place is moved back to 20mm to construction direction top; 2) hold sleeve coupler, by prestressed steel bar precession 3mm; 3) prestressed steel bar at 7# plate seam place is stitched to precession 18mm mark to 8# plate; 4) adopt above-mentioned three one step process to install in turn the sleeve coupler at 7#, 6#, 5#, 4#, 3#, 2# and 1# plate seam place.
Step 4, is realized the pre-buried prestressed steel bar of track plates carry out stretch-draw place by knob sleeve coupling sleeve; Be specially: at the plate seam place of track plates perfusion resin mortar, resin mortar reaches after design strength, track plates prestressed steel bar is carried out to stretch-draw, with long handle torque spanner clamping sleeve coupler, carry out knob, make both sides prestressed steel bar to the precession 12mm of sleeve coupler central authorities, tension sequence is: the prestressed steel bar of first simultaneous tension 3# and 6# plate seam both sides, then the prestressed steel bar of simultaneous tension 1#, 4#, 7# plate seam both sides, then the prestressed steel bar of stretch-draw 2#, 5#, 8# plate seam both sides; Often complete after single tension, with hydraulic jack, carry out the check to stretching force; After completing stretch-draw, tighten 9 track plates the clamp nut at 3# and 6# plate seam place; Connector and prestressed reinforcement exposed portions serve are loaded onto grease with corrugated hose and are wrapped up, and this grease is butter.
Step 5, welded rails plate plate end shear plate; Be specially: after stretch-draw completes, by movable shear plate and the pre-buried shear plate laminating of track plates, then high-strength bolt is installed, movable shear plate is welded on track plates pre-embedded steel slab; After having welded, shear plate and connector and both sides prestressed reinforcement are wrapped up with sealant tape.
By above-described embodiment, can realize the longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, the longitudinal connected system of post-tensioned prestressing passes through special connector linking by longitudinal prestressing without bondn rod iron of track plates, between plate, fill resin mortar, stretch-draw longitudinal prestressing rod iron when mortar reaches design strength, on several track plates that are cascaded, form compressive pre-stress, can effectively prevent gaping of joints between track plates and plate.After the complete prestressing force of stretch-draw, pour into again self-compacting concrete, form complete post-tensioned prestressing longitudinally-connected plate scheme.Because resin mortar modulus of elasticity is less, plate seam place structure a little less than, in order to prevent that under High-speed Train Loads, two plates are staggered, at plate end, be also provided with connecting board structure, for shearing between transmission plate, strengthening plate end connects.
The longitudinal connection construction method of roadbed track plates post-tensioned prestressing of the present invention, easy and simple to handle, be easy to implement, can effectively prevent gaping of joints between track plates and plate; By oil, push up check, guarantee longitudinal quality of connection, welded plate end shear plate is installed simultaneously, make its life-span permanent.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (2)
1. the longitudinal connection construction method of roadbed track plates post-tensioned prestressing, is characterized in that: its adopts following steps to realize:
Step 1, the plate of 9 track plates is stitched to the stretch-draw position mark of numbering and prestressed steel bar: after track slab precision adjustment completes, in order, using 9 track plates as a tensioned unit, a tensioned unit is along stretching construction direction plate seam, and numbering is followed successively by 9#, 8# ... 0# plate seam; In track plates end, expose the 18mm of prestressed steel bar and the position of 30mm makes a mark;
Step 2, on 0#, 3#, 6# and 9# plate seam prestressed reinforcement, clamp nut is installed: the prestressed reinforcement at 0#, 3#, 6# and 9# plate seam place is installed to clamp nut, be specially 0# plate seam tail end, 9# plate seam front end, two ends, 3# plate seam place and two ends, 6# plate seam place, each clamp nut that wherein 3# plate seam and 6# plate stitch, apart from plate groove end face, leave the surplus of 20mm, the clamp nut at 0# plate seam and 9# plate seam place is screwed onto plate end;
Step 3, successively at 8#, 7# to 1# plate seam place installing sleeve connector: 1) prestressed steel bar at 8# plate seam place is moved back to 20mm to construction direction top; 2) hold sleeve coupler, by prestressed steel bar precession 3mm; 3) prestressed steel bar at 7# plate seam place is stitched to precession 18mm mark to 8# plate; 4) adopt above-mentioned three one step process to install in turn the sleeve coupler at 7#, 6#, 5# to 1# plate seam place;
Step 4, is realized the pre-buried prestressed steel bar of track plates is carried out to stretch-draw by knob sleeve coupling sleeve; Particularly: at the plate seam place of track plates perfusion resin mortar, resin mortar reaches after design strength, track plates prestressed steel bar is carried out to stretch-draw, with long handle torque spanner clamping sleeve coupler, carry out knob, make both sides prestressed steel bar to the precession 12mm of sleeve coupler central authorities, tension sequence is: the prestressed steel bar of first simultaneous tension 3# and 6# plate seam both sides, then the prestressed steel bar of simultaneous tension 1#, 4#, 7# plate seam both sides, then the prestressed steel bar of stretch-draw 2#, 5#, 8# plate seam both sides; Often complete after single tension, with hydraulic jack, carry out the check to stretching force; After completing stretch-draw, tighten 9 track plates the clamp nut at 3# and 6# plate seam place; Connector and prestressed reinforcement exposed portions serve are loaded onto grease with corrugated hose and are wrapped up;
Step 5, welded rails plate plate end shear plate.
2. the longitudinal connection construction method of roadbed track plates post-tensioned prestressing as claimed in claim 1, it is characterized in that: in step 5, after stretch-draw completes, by movable shear plate and the pre-buried shear plate laminating of track plates, high-strength bolt is installed again, movable shear plate is welded on track plates pre-embedded steel slab; After having welded, shear plate and connector and both sides prestressed reinforcement are wrapped up with sealant tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210001560.XA CN102535272B (en) | 2012-01-05 | 2012-01-05 | Construction method for post-stretched pre-stress longitudinal connection of road bed track slabs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210001560.XA CN102535272B (en) | 2012-01-05 | 2012-01-05 | Construction method for post-stretched pre-stress longitudinal connection of road bed track slabs |
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| CN102535272A CN102535272A (en) | 2012-07-04 |
| CN102535272B true CN102535272B (en) | 2014-08-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100500998C (en) * | 2006-03-30 | 2009-06-17 | 中铁八局集团有限公司 | Stretching method for applying prestress on track slab |
| CN100564674C (en) * | 2006-04-25 | 2009-12-02 | 中铁八局集团有限公司 | Method for mounting rail fastening on track slab |
| CN100523376C (en) * | 2006-04-27 | 2009-08-05 | 中铁八局集团有限公司 | Longitudinal track plate connection method |
| CN101761000B (en) * | 2009-12-30 | 2011-09-14 | 中铁二十三局集团有限公司 | Nine-connecting-plate connective tensioning construction method for road bed |
| CN101768898B (en) * | 2009-12-31 | 2011-09-14 | 中铁二十三局集团有限公司 | Longitudinally connected rail plates and connecting method thereof |
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