CN103528842A - Static load test device and static load test method for cradle trusses - Google Patents
Static load test device and static load test method for cradle trusses Download PDFInfo
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- CN103528842A CN103528842A CN201310478118.0A CN201310478118A CN103528842A CN 103528842 A CN103528842 A CN 103528842A CN 201310478118 A CN201310478118 A CN 201310478118A CN 103528842 A CN103528842 A CN 103528842A
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Abstract
The invention discloses a static load test device and a static load test method for cradle trusses. The problems of large suspending workload and big overhead operation risk existing in the existing cradle static load tests are solved. A rear truss (5) and a front truss (6) are horizontally arranged on each support platform symmetrically, a steel cushion block is arranged between the two trusses, and an anchoring end binding bolt (11) is arranged between an upper anchoring end shoulder-pole beam (9) and a lower anchoring end shoulder-pole beam (10); an upper cantilever end shoulder-pole beam (12), a rear jack (15), the cantilever end of the rear truss (5), the cantilever end of the front truss (6) and a lower cantilever end shoulder-pole beam (13) are sequentially bond together by an anchoring end binding bolt (14); shift measuring centimeters are arranged at both the anchoring ends and the cantilever ends of the two trusses. The invention further discloses steps and the method for the static load tests of the cradle trusses. The static load tests of the cradle trusses are previously carried out on ground instead of bridge piles during construction. The device and the method are particularly suitable for being used in construction.
Description
Technical field
The present invention relates to a kind of the Hanging Basket using in bridge construction is carried out the device of static test and carries out the method for static test, particularly a kind of truss to the Hanging Basket using in bridge construction carries out the device of static test and carries out Static Load Test Method.
Background technology
Hanging Basket is preparation of construction conventional in bridge construction, but must carry out static test before Hanging Basket is used, and through its intensity of verification experimental verification, rigidity and security, has reached after designing requirement, just can be put into use.Existing hanging basket static loading test is to carry out on the bridge pier in construction, step is as follows: first on the beam face at the main pier of construction bridges top, assemble Hanging Basket, be ready to meet the pre-briquetting of heap dead weight capacity requirement simultaneously, subsequently pre-briquetting is lifted on the bed die of Hanging Basket and carries out piling prepressing, and in precompressed process, observe the deflection of Hanging Basket truss cantilever end, until deflection is laid down pre-briquetting after stable again.This Static Load Test Method exists: use prepressing materials many, lift pre-briquetting workload large, construction costs is high, takies the problem that the engineering time is long and work high above the ground has a big risk; If there is the underproof situation of hanging basket static loading test, need to Hanging Basket be carried out consolidation process or at the construction field (site) Hanging Basket be removed in high-altitude, badly influenced the progress of construction.
Summary of the invention
The invention provides a kind of Hanging Basket truss static-load testing device and Static Load Test Method, the lifting workload that has solved existing hanging basket static loading test existence is large, uses prepressing materials many, and construction costs is high, and observation time is long, the problem that work high above the ground has a big risk.
The present invention solves above technical matters by the following technical programs:
A kind of Hanging Basket truss static-load testing device, comprise anchored end support platform, support end support platform, rear truss cantilever end support platform, front truss cantilever end support platform, rear truss and front truss, rear truss is horizontally set on anchored end support platform, in support end support platform and rear truss cantilever end support platform, front truss is horizontally set on anchored end support platform, in support end support platform and front truss cantilever end support platform, rear truss and front truss be take left and right directions horizontal median axis as axis of symmetry symmetrically arranged, between the anchored end of rear truss and the anchored end of front truss, be provided with anchored end steel sleeper, between the support end of rear truss and the support end of front truss, be provided with support end steel sleeper, on the trailing flank of the anchored end of rear truss, be movably set with shoulder pole girder in anchored end, on the leading flank of the anchored end of front truss, be movably set with shoulder pole girder under anchored end, in anchored end, under shoulder pole girder and anchored end, between shoulder pole girder, be provided with 2 anchored end split bolts, lifting jack after being provided with on the trailing flank of the cantilever end of rear truss, rear side end at rear lifting jack is provided with shoulder pole girder on cantilever end, on the leading flank of the cantilever end of front truss, be provided with shoulder pole girder under cantilever end, anchored end split bolt successively by shoulder pole girder, rear lifting jack, the cantilever end of rear truss, the cantilever end of front truss and shoulder pole girder under cantilever end on cantilever end to together with being pulled in, truss anchored end displacement dial gauge after the anchored end of rear truss is provided with, truss anchored end displacement dial gauge before the anchored end of front truss is provided with, truss cantilever end displacement dial gauge after the cantilever end of rear truss is provided with, truss cantilever end displacement dial gauge before the cantilever end of front truss is provided with.
On rear lifting jack, be provided with top lift indicating gauge.
A truss Static Load Test Method, comprises the following steps:
The first step, on same level ground, place respectively anchored end support platform, support end support platform, rear truss cantilever end support platform and front truss cantilever end support platform;
Second step, rear truss is horizontally set in anchored end support platform, support end support platform and rear truss cantilever end support platform, front truss is horizontally set in anchored end support platform, support end support platform and front truss cantilever end support platform, and rear truss and front truss are symmetrical arranged before and after axis of symmetry centered by the horizontal median axis of left and right directions; Between the anchored end of rear truss and the anchored end of front truss, place anchored end steel sleeper, between the support end of rear truss and the support end of front truss, place support end steel sleeper;
The 3rd step, at the rear side of the trailing flank of the anchored end of rear truss, shoulder pole girder in anchored end is set, front side at the leading flank of the anchored end of front truss arranges shoulder pole girder under anchored end, by the cross-under of 2 anchored end split bolts in anchored end between shoulder pole girder and lower shoulder pole girder, and with fastening nuts, make together with the anchored end of anchored end, anchored end steel sleeper and the front truss of rear truss sockets;
The 4th step, at the rear side of the trailing flank of the cantilever end of rear truss, shoulder pole girder on cantilever end is set, front side at the leading flank of the cantilever end of front truss arranges shoulder pole girder under cantilever end, by the cross-under of 2 cantilever end split bolts on cantilever end under shoulder pole girder and cantilever end between shoulder pole girder; Rear lifting jack is placed on cantilever end between shoulder pole girder and the cantilever end of rear truss, the nut at the two ends of fastening cantilever end split bolt, makes shoulder pole girder on cantilever end, rear lifting jack, the cantilever end of rear truss, the cantilever end of front truss together with shoulder pole girder sockets under cantilever end;
The 5th step, after the rear side of the anchored end of rear truss arranges truss anchored end displacement dial gauge, truss cantilever end displacement dial gauge after the front side of the cantilever end of rear truss arranges; Truss anchored end displacement dial gauge before the front side of the anchored end of front truss arranges, truss cantilever end displacement dial gauge before the rear side of the cantilever end of front truss arranges;
Lifting jack after the 6th step, startup jacking, make the cantilever end of rear truss bear top power forward, meanwhile, make the cantilever end of front truss bear pulling force backward, pressure tabular value on rear lifting jack be designated as set precompression 10% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge, front truss anchored end displacement dial gauge, rear truss cantilever end displacement dial gauge and front truss cantilever end displacement dial gauge;
The 7th step, the pressure tabular value on rear lifting jack be designated as set precompression 80% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge, front truss anchored end displacement dial gauge, rear truss cantilever end displacement dial gauge and front truss cantilever end displacement dial gauge;
The 8th step, the pressure tabular value on rear lifting jack be designated as set precompression 100% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge, front truss anchored end displacement dial gauge, rear truss cantilever end displacement dial gauge and front truss cantilever end displacement dial gauge;
The 9th step, the truss anchored end that the 6th step, the 7th step and the 8th step are recorded and the dial gauge reading of truss cantilever end are analyzed, draw respectively the elastic deformation amount of cantilever end when peak load and the line shape function relation of elastic deformation amount and pressure load of rear truss and front truss, the installation parameter of formwork elevation measuring is provided while adopting cradle construction for the later stage.
The present invention changes hanging basket static loading test on the ground into and carries out in advance on the bridge in construction, has saved prepressing materials, has avoided the risk of work high above the ground; Precompressed is carried out on the ground in advance, has shortened the Construction of continuous beam duration of bridge; If static test is defective, also can, on ground in the face of Hanging Basket carries out consolidation process in advance, can not have any impact to the Construction of continuous beam duration.
Accompanying drawing explanation
Fig. 1 is that the present invention is at the structural representation of overlooking under direction.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
A kind of Hanging Basket truss static-load testing device, comprise anchored end support platform 1, support end support platform 2, rear truss cantilever end support platform 3, front truss cantilever end support platform 4, rear truss 5 and front truss 6, rear truss 5 is horizontally set on anchored end support platform 1, in support end support platform 2 and rear truss cantilever end support platform 3, front truss 6 is horizontally set on anchored end support platform 1, in support end support platform 2 and front truss cantilever end support platform 4, rear truss 5 and front truss 6 are that to take the horizontal median axis 20 of left and right directions symmetrically arranged for axis of symmetry is front and back, between the anchored end of rear truss 5 and the anchored end of front truss 6, be provided with anchored end steel sleeper 7, between the support end of rear truss 5 and the support end of front truss 6, be provided with support end steel sleeper 8, on the trailing flank of the anchored end of rear truss 5, be movably set with shoulder pole girder 9 in anchored end, on the leading flank of the anchored end of front truss 6, be movably set with shoulder pole girder 10 under anchored end, in anchored end, under shoulder pole girder 9 and anchored end, between shoulder pole girder 10, be provided with 2 anchored end split bolts 11, lifting jack 15 after being provided with on the trailing flank of the cantilever end of rear truss 5, rear side end at rear lifting jack 15 is provided with shoulder pole girder 12 on cantilever end, on the leading flank of the cantilever end of front truss 6, be provided with shoulder pole girder 13 under cantilever end, together with anchored end split bolt 14 is pulled in 13 pairs of the cantilever end of the cantilever end of shoulder pole girder on cantilever end 12, rear lifting jack 15, rear truss 5, front truss 6 and shoulder pole girders under cantilever end successively, truss anchored end displacement dial gauge 17 after the anchored end of rear truss 5 is provided with, truss anchored end displacement dial gauge 18 before the anchored end of front truss 6 is provided with, truss cantilever end displacement dial gauge 19 after the cantilever end of rear truss 5 is provided with, truss cantilever end displacement dial gauge 16 before the cantilever end of front truss 6 is provided with.
On rear lifting jack 15, be provided with top lift indicating gauge.
A truss Static Load Test Method, comprises the following steps:
The first step, on same level ground, place respectively anchored end support platform 1, support end support platform 2, rear truss cantilever end support platform 3 and front truss cantilever end support platform 4;
Second step, rear truss 5 is horizontally set in anchored end support platform 1, support end support platform 2 and rear truss cantilever end support platform 3, front truss 6 is horizontally set in anchored end support platform 1, support end support platform 2 and front truss cantilever end support platform 4, and rear truss 5 is symmetrical arranged before and after being with front truss 6 axis of symmetry centered by the horizontal median axis 20 of left and right directions; Between the anchored end of rear truss 5 and the anchored end of front truss 6, place anchored end steel sleeper 7, between the support end of rear truss 5 and the support end of front truss 6, place support end steel sleeper 8;
The 3rd step, at the rear side of the trailing flank of the anchored end of rear truss 5, shoulder pole girder 9 in anchored end is set, front side at the leading flank of the anchored end of front truss 6 arranges shoulder pole girder 10 under anchored end, by 2 anchored end split bolt 11 cross-under in anchored end between shoulder pole girder 9 and lower shoulder pole girder 10, and with fastening nuts, make together with anchored end, the anchored end steel sleeper 7 of rear truss 5 socket with the anchored end of front truss 6;
The 4th step, at the rear side of the trailing flank of the cantilever end of rear truss 5, shoulder pole girder 12 on cantilever end is set, front side at the leading flank of the cantilever end of front truss 6 arranges shoulder pole girder 13 under cantilever end, by 2 cantilever end split bolt 14 cross-under on cantilever end under shoulder pole girder 12 and cantilever end between shoulder pole girder 13; Rear lifting jack 15 is placed on cantilever end between shoulder pole girder 12 and the cantilever end of rear truss 5, the nut at the two ends of fastening cantilever end split bolt 14, makes the cantilever end of shoulder pole girder 12 on cantilever end, rear lifting jack 15, rear truss 5, together with the cantilever end of front truss 6 sockets with shoulder pole girder under cantilever end 13;
The 5th step, after the rear side of the anchored end of rear truss 5 arranges truss anchored end displacement dial gauge 17, truss cantilever end displacement dial gauge 19 after the front side of the cantilever end of rear truss 5 arranges; Truss anchored end displacement dial gauge 18 before the front side of the anchored end of front truss 6 arranges, truss cantilever end displacement dial gauge 16 before the rear side of the cantilever end of front truss 6 arranges;
The 7th step, the pressure tabular value on rear lifting jack 15 be designated as set precompression 80% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge 17, front truss anchored end displacement dial gauge 18, rear truss cantilever end displacement dial gauge 19 and front truss cantilever end displacement dial gauge 16;
The 8th step, the pressure tabular value on rear lifting jack 15 be designated as set precompression 100% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement percentage 17, front truss anchored end displacement dial gauge 18, rear truss cantilever end displacement dial gauge 19 and front truss cantilever end displacement dial gauge 16;
The 9th step, the truss anchored end that the 6th step, the 7th step and the 8th step are recorded and the dial gauge reading of truss cantilever end are analyzed, draw respectively the elastic deformation amount of cantilever end when peak load and the line shape function relation of elastic deformation amount and pressure load of rear truss 5 and front truss 6, the installation parameter of formwork elevation measuring is provided while adopting cradle construction for the later stage.
The present invention is that in the precompressed test based on the existing Hanging Basket of doing on bridge, the force analysis of Hanging Basket truss and safety verification, be converted into and simulate truly on the ground its skyborne stressing conditions and safety verification.Also this static-load testing device can be arranged on to Hanging Basket manufacturer, before Hanging Basket dispatches from the factory, according to Field design, require to carry out hanging basket static loading test, and analyze its stressing conditions and stressed safety case, hanging basket static loading test is omitted from on-site construction processes, save the duration, reduced construction costs, improved the safety coefficient of construction.The present invention has utilized the relation of acting force and reacting force dexterously, two truss of Hanging Basket are symmetrical arranged by leaning against privately, and socket into the stressed integral body supporting each other by split bolt, by the cantilever end at Hanging Basket truss, jack pressure is set simultaneously, by the jacking of lifting jack, simulated truly the construction stress scene of Hanging Basket truss on bridge, reached the object of static test, make whole static test controllable, two Hanging Basket truss are tested simultaneously, also played the effect of saving experimental period and saving equipment investment.By static-load testing device of the present invention and test method, record the elastic deformation of Hanging Basket truss and the line shape function relation between pressure, the installation parameter of formwork elevation measuring is provided while adopting cradle construction for the later stage; If Hanging Basket truss static test is defective, can ground safe ready carry out advanced processing, can not affect construction speed and the construction safety of continuous beam.
Claims (3)
1. a Hanging Basket truss static-load testing device, comprise anchored end support platform (1), support end support platform (2), rear truss cantilever end support platform (3), front truss cantilever end support platform (4), rear truss (5) and front truss (6), it is characterized in that, rear truss (5) is horizontally set on anchored end support platform (1), in support end support platform (2) and rear truss cantilever end support platform (3), front truss (6) is horizontally set on anchored end support platform (1), in support end support platform (2) and front truss cantilever end support platform (4), rear truss (5) and front truss (6) be take left and right directions horizontal median axis (20) as axis of symmetry symmetrically arranged, between the anchored end of rear truss (5) and the anchored end of front truss (6), be provided with anchored end steel sleeper (7), between the support end of rear truss (5) and the support end of front truss (6), be provided with support end steel sleeper (8), on the trailing flank of the anchored end of rear truss (5), be movably set with shoulder pole girder in anchored end (9), on the leading flank of the anchored end of front truss (6), be movably set with shoulder pole girder under anchored end (10), under shoulder pole girder in anchored end (9) and anchored end, between shoulder pole girder (10), be provided with 2 anchored end split bolts (11), on the trailing flank of the cantilever end of rear truss (5), be provided with rear lifting jack (15), rear side end at rear lifting jack (15) is provided with shoulder pole girder on cantilever end (12), on the leading flank of the cantilever end of front truss (6), be provided with shoulder pole girder under cantilever end (13), anchored end split bolt (14) successively by the cantilever end of shoulder pole girder on cantilever end (12), rear lifting jack (15), the cantilever end of rear truss (5), front truss (6) and shoulder pole girder under cantilever end (13) to together with being pulled in, anchored end at rear truss (5) is provided with rear truss anchored end displacement dial gauge (17), anchored end at front truss (6) is provided with front truss anchored end displacement dial gauge (18), cantilever end at rear truss (5) is provided with rear truss cantilever end displacement dial gauge (19), at the cantilever end of front truss (6), is provided with front truss cantilever end displacement dial gauge (16).
2. a kind of Hanging Basket truss static-load testing device according to claim 1, is characterized in that, on rear lifting jack (15), is provided with top lift indicating gauge.
3. a Hanging Basket truss Static Load Test Method, comprises the following steps:
The first step, on same level ground, place respectively anchored end support platform (1), support end support platform (2), rear truss cantilever end support platform (3) and front truss cantilever end support platform (4);
Second step, rear truss (5) is horizontally set in anchored end support platform (1), support end support platform (2) and rear truss cantilever end support platform (3), front truss (6) is horizontally set on to anchored end support platform (1), support end support platform (2) and front truss cantilever end support platform (4) upper, rear truss (5) is symmetrical arranged before and after axis of symmetry centered by the horizontal median axis (20) of left and right directions with front truss (6); Between the anchored end of rear truss (5) and the anchored end of front truss (6), place anchored end steel sleeper (7), between the support end of rear truss (5) and the support end of front truss (6), place support end steel sleeper (8);
The 3rd step, at the rear side of the trailing flank of the anchored end of rear truss (5), shoulder pole girder in anchored end (9) is set, front side at the leading flank of the anchored end of front truss (6) arranges shoulder pole girder under anchored end (10), by 2 anchored end split bolts (11) cross-under in anchored end between shoulder pole girder (9) and lower shoulder pole girder (10), and with fastening nuts, the anchored end of anchored end, anchored end steel sleeper (7) and the front truss (6) of rear truss (5) is socketed together;
The 4th step, at the rear side of the trailing flank of the cantilever end of rear truss (5), shoulder pole girder on cantilever end (12) is set, front side at the leading flank of the cantilever end of front truss (6) arranges shoulder pole girder under cantilever end (13), by 2 cantilever end split bolts (14) cross-under on cantilever end under shoulder pole girder (12) and cantilever end between shoulder pole girder (13); Rear lifting jack (15) is placed between shoulder pole girder on cantilever end (12) and the cantilever end of rear truss (5), the nut at the two ends of fastening cantilever end split bolt (14), makes together with the cantilever end of shoulder pole girder on cantilever end (12), rear lifting jack (15), the cantilever end of rear truss (5), front truss (6) sockets with shoulder pole girder under cantilever end (13);
The 5th step, at the rear side of the anchored end of rear truss (5), rear truss anchored end displacement dial gauge (17) is set, in the front side of the cantilever end of rear truss (5), rear truss cantilever end displacement dial gauge (19) is set; Front side in the anchored end of front truss (6) arranges front truss anchored end displacement dial gauge (18), at the rear side of the cantilever end of front truss (6), front truss cantilever end displacement dial gauge (16) is set;
Lifting jack (15) after the 6th step, startup jacking, make the cantilever end of rear truss (5) bear top power forward, meanwhile, make the cantilever end of front truss (6) bear pulling force backward, pressure tabular value on rear lifting jack (15) be designated as set precompression 10% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge (17), front truss anchored end displacement dial gauge (18), rear truss cantilever end displacement dial gauge (19) and front truss cantilever end displacement dial gauge (16);
The 7th step, the pressure tabular value on rear lifting jack (15) be designated as set precompression 80% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge (17), front truss anchored end displacement dial gauge (18), rear truss cantilever end displacement dial gauge (19) and front truss cantilever end displacement dial gauge (16);
The 8th step, the pressure tabular value on rear lifting jack (15) be designated as set precompression 100% time, after keeping pressure stable to truss deflection, read and record the reading of rear truss anchored end displacement dial gauge (17), front truss anchored end displacement dial gauge (18), rear truss cantilever end displacement dial gauge (19) and front truss cantilever end displacement dial gauge (16);
The 9th step, the truss anchored end that the 6th step, the 7th step and the 8th step are recorded and the dial gauge reading of truss cantilever end are analyzed, draw respectively the elastic deformation amount of cantilever end when peak load and the line shape function relation of elastic deformation amount and pressure load of rear truss (5) and front truss (6), the installation parameter of formwork elevation measuring is provided while adopting cradle construction for the later stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310478118.0A CN103528842B (en) | 2013-10-14 | 2013-10-14 | Hanging Basket truss static-load testing device and Static Load Test Method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310478118.0A CN103528842B (en) | 2013-10-14 | 2013-10-14 | Hanging Basket truss static-load testing device and Static Load Test Method |
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| CN103528842A true CN103528842A (en) | 2014-01-22 |
| CN103528842B CN103528842B (en) | 2015-10-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942809A (en) * | 2010-09-30 | 2011-01-12 | 中铁四局集团第一工程有限公司 | Hanging-basket main-truss prepressing system |
| CN102004058A (en) * | 2010-10-18 | 2011-04-06 | 中铁十九局集团有限公司 | Suspended scaffolding static load test method |
| CN201837361U (en) * | 2010-09-30 | 2011-05-18 | 中铁四局集团第一工程有限公司 | Dial indicator monitoring device for prepressing deformation of cradle |
| CN203160141U (en) * | 2013-04-01 | 2013-08-28 | 中铁十局集团第二工程有限公司 | Prepressing system for hanging basket main trusses |
| CN203534843U (en) * | 2013-10-14 | 2014-04-09 | 中铁十九局集团有限公司 | Static load test device for cradle trusses |
-
2013
- 2013-10-14 CN CN201310478118.0A patent/CN103528842B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942809A (en) * | 2010-09-30 | 2011-01-12 | 中铁四局集团第一工程有限公司 | Hanging-basket main-truss prepressing system |
| CN201837361U (en) * | 2010-09-30 | 2011-05-18 | 中铁四局集团第一工程有限公司 | Dial indicator monitoring device for prepressing deformation of cradle |
| CN102004058A (en) * | 2010-10-18 | 2011-04-06 | 中铁十九局集团有限公司 | Suspended scaffolding static load test method |
| CN203160141U (en) * | 2013-04-01 | 2013-08-28 | 中铁十局集团第二工程有限公司 | Prepressing system for hanging basket main trusses |
| CN203534843U (en) * | 2013-10-14 | 2014-04-09 | 中铁十九局集团有限公司 | Static load test device for cradle trusses |
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