CN214503144U - Highway box girder static load test device - Google Patents
Highway box girder static load test device Download PDFInfo
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- CN214503144U CN214503144U CN202120156261.8U CN202120156261U CN214503144U CN 214503144 U CN214503144 U CN 214503144U CN 202120156261 U CN202120156261 U CN 202120156261U CN 214503144 U CN214503144 U CN 214503144U
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- roof beam
- case roof
- jack
- box girder
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Abstract
The utility model relates to a highway case roof beam static test device, it is including the test bench that is used for supporting the case roof beam, test bench below is equipped with the adjustment mechanism who is used for adjusting test bench height, the case roof beam is placed in the test bench top, case roof beam top is equipped with the counter-force mechanism who is used for applying the counter-force to the case roof beam, counter-force mechanism includes one end butt in the counter-force jack of case roof beam, with the crossbeam that the counter-force jack other end is connected, pre-buried in the anchor pile on ground and the steel strand wires of connecting crossbeam and anchor pile. This application simple structure, in the actual test process, whole equipment is installed and removed convenience, equipment are simple and easy.
Description
Technical Field
The utility model belongs to the technical field of the box girder monitoring technique and specifically relates to a highway box girder static load test device is related to.
Background
In the construction of a high-speed railway, the occupation ratio of a bridge is large due to the linear shape and land saving, most of the bridge needs to be constructed by adopting a standard box girder, a girder construction field needs to be built to complete the prefabrication of the box girder, the quality of the prefabricated box girder needs to be authenticated and evaluated through a static load test before the box girder leaves the field, the static load test of the high-speed railway box girder mostly adopts 5-point equivalent concentrated load loading, concentrated force is applied by adopting a large-tonnage jack, and the jack needs a truss type reaction frame with the same length as the box girder to provide reaction force.
The steel truss type reaction frame is large in size, large in self weight, most of the steel truss type reaction frame is connected through bolts, a large amount of mechanical equipment is needed for matching, assembly generally requires one week of time, transportation is difficult, assembly and disassembly are complicated, and the manufacturing cost is high, so that a loading reaction device used in a static load test of a box girder of an expressway is needed to solve the technical problem.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of installing and removing loaded down with trivial details, equipment difficulty, this application provides a highway case roof beam static load test device.
The application provides a highway case roof beam static test device adopts following technical scheme:
the utility model provides a highway case roof beam static test device, is including the test pedestal that is used for supporting the case roof beam, test pedestal below is equipped with the adjustment mechanism who is used for adjusting test pedestal height, the case roof beam is placed in test pedestal top, the case roof beam top is equipped with and is used for applying the counter-force mechanism of counter-force to the case roof beam, counter-force mechanism includes the one end butt in the counter-force jack of case roof beam, with the crossbeam that the counter-force jack other end is connected, pre-buried in the anchor pile on ground and the steel strand wires of connecting crossbeam and anchor pile.
Through adopting above technical scheme, can carry out the box girder static test on the test bench, place the box girder back on the test bench, at first utilize adjustment mechanism to adjust the box girder to suitable experimental height, reaction mechanism exerts the counter-force to the box girder afterwards and carries out the static test, start reaction jack this moment and exert decurrent pressure to the box girder, under the balanced state that keeps power, the jack is exerted ascending reaction force to the crossbeam simultaneously, and steel strand wires exert decurrent pressure to the crossbeam, make the crossbeam keep relative static. Above-mentioned structure utilizes the combination of crossbeam, anchor pile and steel strand wires to replace traditional truss-like reaction frame, and the steel strand wires passes through the anchor pile to be connected in ground for the crossbeam drives reaction jack and applys the counter-force to the case roof beam, and such structural grouping not only conveniently installs and removes, has mechanical properties simultaneously well, the lower advantage of input cost.
Furthermore, one end of the steel strand is connected to the anchor pile, the other end of the steel strand penetrates through the cross beam, the penetrating end of the steel strand is connected with a penetrating type jack, and the penetrating type jack is connected to the cross beam.
Through adopting above technical scheme, the punching jack is supported by the crossbeam, and the punching jack can cooperate with the anchor pile simultaneously, realizes the stretch-draw to connecting the steel strand wires between punching jack and anchor pile.
Further, adjustment mechanism is including adjusting the base, it is located the below of test bench to be equipped with first motor and adjusting the base on the adjusting the base, the output shaft of first motor has the lead screw, the lead screw extends along vertical direction, be equipped with the screw through-hole of cooperation lead screw on the test bench, lead screw threaded connection is in test bench.
Through adopting above technical scheme, but the lead screw rotates after starting first motor, and the lead screw pivoted makes the test bench with drive lead screw threaded connection begin to remove simultaneously to the realization is to the altitude mixture control of test bench.
Further, be equipped with the holding tank that is used for holding the case roof beam on the test bench seat, the case roof beam base inlays to be located in the holding tank.
By adopting the technical scheme, due to the existence of the accommodating groove, when the placed box girder deviates, on one hand, the accommodating groove provides a limiting force for the box girder so that the box girder is stably placed on the test bed; on the other hand, the driving screw rod can be protected, so that the box girder can not touch the driving screw rod when in deviation, and the driving screw rod or the box girder can be prevented from being damaged.
Furthermore, the reaction mechanism comprises a reaction jack, the reaction jack is mounted on the cross beam, and the top end of the reaction jack is abutted against the center of the box girder.
Through adopting above technical scheme, usable reaction jack applys the counter force to the case roof beam to the realization is to the static test of case roof beam.
Furthermore, be equipped with the locating part that is used for centre gripping reaction jack on the crossbeam, the locating part includes sliding connection on the crossbeam and perpendicular to crossbeam first limiting plate, second limiting plate and is used for adjusting the two-way lead screw of first limiting plate and second limiting plate relative distance, all seted up on first limiting plate and the second limiting plate with two-way lead screw complex screw through-hole, be equipped with on the crossbeam and be used for driving two-way lead screw pivoted second motor.
Through the technical scheme above adopting, after starting the second motor, the rotation of two-way lead screw can make first limiting plate and second limiting plate be close to each other, and the spacing cavity that two limiting plates formed is used for holding the reaction jack, can apply a horizontal confining force to the reaction jack simultaneously for reaction jack working direction is perpendicular to crossbeam all the time, guarantees again when carrying out the experiment of box girder static load, and the skew in the working direction can not take place for the reaction jack.
Furthermore, the abutting part of the reaction jack and the box girder is provided with a contact plate for increasing the contact area of the reaction jack and the box girder, one side of the contact plate is connected to the reaction jack, and the other side of the contact plate abuts against the box girder.
Through adopting above technical scheme for the power that the jack was exerted can more even transmit for the box girder, has avoided the box girder to receive great concentrated stress, thereby takes place the skew of box girder.
Furthermore, the crossbeam divide into and levels the section and dismantles the section, level and level section both ends and be equipped with the screw hole, be equipped with the fixed strip that is used for cooperating the screw hole in the dismantlement section, it has screw rod and screw rod to wear out end threaded connection in the threaded hole of leveling the section to alternate on the fixed strip.
Through adopting above technical scheme, the accessible is twisted the screw rod and is accomplished the dismantlement to the crossbeam, adjusts crossbeam length and detects in order to adapt to not unidimensional case roof beam.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the traditional truss type reaction frame is replaced by the combination of the cross beam, the anchor pile and the steel strand, so that on one hand, the effect of applying reaction force to the box girder can be realized, and on the other hand, the structure is simple and the disassembly is convenient;
2. the contact plate that sets up on the reaction jack has increased the area of contact with the case roof beam, has avoided the case roof beam can receive great concentrated stress, prevents that the case roof beam from taking place the skew because the atress is inhomogeneous in the static test process.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is an enlarged view of a portion a of fig. 1 in the embodiment of the present application.
Fig. 3 is a top view of an embodiment of the present application.
Fig. 4 is a schematic cross-sectional structure diagram of an embodiment of the present application.
FIG. 5 is an enlarged view of the portion B of FIG. 4 in the embodiment of the present application.
Description of reference numerals: 1. a test bed; 2. an adjustment mechanism; 3. an adjusting base; 4. a supporting seat; 5. a screw rod; 6. a first motor; 7. accommodating grooves; 8. a box girder; 9. a counter-force mechanism; 10. a reaction jack; 11. a contact plate; 12. a cross beam; 13. steel strand wires; 14. anchoring piles; 15. a feed-through jack; 16. leveling section; 17. disassembling the section; 18. a fixing strip; 19. a first limit plate; 20. a second limiting plate; 21. a chute; 22. a slider; 23. a bidirectional screw rod; 24. a second motor.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses highway box girder static load test device. Referring to fig. 1, the test bed 1 for supporting the box girder 8 is included, and an adjusting mechanism 2 is provided below the test bed 1, and the adjusting mechanism 2 is placed on the ground and used for supporting the test bed 1.
A holding tank 7 has been seted up at the top surface of test pedestal 1, has placed case roof beam 8 in holding tank 7, and the existence of holding tank 7 makes placing in holding tank 7 that case roof beam 8 can be stable, if the skew of case roof beam 8 appears in the test process simultaneously, holding tank 7 can apply certain spacing power and prevent that case roof beam 8 from touching lead screw 5, lead to lead screw 5 or case roof beam 8 to appear damaging.
As shown in fig. 1, a reaction force mechanism 9 is abutted on the upper side of the box girder 8, and the reaction force mechanism 9 applies a reaction force and completes a test of a static load of the box girder 8. Reaction mechanism 9 includes the butt in the reaction jack 10 of case roof beam 8, is equipped with contact plate 11 on reaction jack 10, and the one end of reaction jack 10 utilizes the butt of contact plate 11 on case roof beam 8 to make the transmission that the power of reaction jack 10 application can be more even for case roof beam 8, avoided case roof beam 8 to receive great concentrated stress, there is crossbeam 12 at the other end of reaction jack 10 through bolted connection.
As shown in fig. 3 and 4, steel strands 13 are inserted into two ends of the beam 12, one end of each steel strand 13 is fixed on the ground through an anchor pile 14, the other end of each steel strand 13 penetrates through the beam 12, a penetrating end of each steel strand is connected with a penetrating jack 15, and the penetrating jacks 15 are placed on the beam 12 to stretch the steel strands 13. The combination of the anchor piles 14, the steel strands 13, the penetrating jacks 15 and the cross beams 12 can be used for replacing a traditional truss type reaction frame, the steel strands 13 are connected with the ground through the anchor piles 14 pre-buried on the ground, the penetrating jacks 15 stretch the steel strands 13, the maximum height of the cross beams 12 connected with the steel strands 13 is limited, the supporting force of the reaction jacks 10 supporting the cross beams 12 below the cross beams 12 can be converted into equal anti-supporting force when force is applied by the reaction jacks 10 below the cross beams 12, the sum of the anti-supporting force and the gravity of the cross beams 12 is the counter force applied to the box girders 8, and therefore the same effect of the truss type reaction frame is achieved, but the structure is easier to assemble and disassemble, and has the advantages of good mechanical property and low input cost.
As shown in fig. 3, the cross beam 12 is divided into a leveling section 16 and a disassembling section 17, so that the cross beam 12 can realize the disassembling function, and the length of the cross beam 12 can be conveniently adjusted to be suitable for the test tests of the box beams 8 with different lengths in practical situations. Be equipped with the screw hole at the both ends of leveling section 16, be equipped with fixed strip 18 in dismantling section 17 simultaneously and leveling 16 junctions of section, be equipped with the through-hole on fixed strip 18, when leveling section 16 and dismantling section 17 butt, the screw hole corresponds with fixed strip 18 is the same, can wear to inject the screw rod this moment, utilizes the screw rod can accomplish the combination of dismantling section 17 and leveling 16, and the dismantlement of section 17 and leveling 16 section can be accomplished to the same not hard up screw rod.
As shown in fig. 4 and 5, the cross beam 12 is provided with a stopper for locking the reaction jack 10. The limiting part comprises a first limiting plate 19 and a second limiting plate 20, a sliding groove 21 is formed in the beam 12, the first limiting plate 19 and the second limiting plate 20 are connected to the sliding groove 21 in a sliding mode, the joint of the first limiting plate 19 and the second limiting plate 20 is called a sliding block 22, two sliding blocks 22 are inserted into a two-way screw rod 23, a first thread and a second thread are arranged on the two-way screw rod 23, the rotating directions of the first thread and the second thread are opposite, the sliding block 22 of the first limiting plate 19 is connected to the first thread, and the sliding block 22 of the second limiting plate 20 is connected to the second thread. Meanwhile, one end of the beam 12 is connected with a second motor 24 for driving the bidirectional screw 23 to rotate, and the second motor is started. After 24, the bidirectional screw 23 is driven to rotate, and at this time, the opposite rotation directions of the first thread and the second thread can enable the first limiting plate 19 and the second limiting plate 20 to move close to or away from each other. The first limiting plate 19 and the second limiting plate 20 are close to each other to clamp the reaction jack 10, and meanwhile, the reaction jack 10 can be prevented from deviating in the test process, so that the working direction of the reaction jack 10 is always perpendicular to the beam 12, and the normal operation of the test is guaranteed.
The implementation principle of the highway box girder static load test device in the embodiment of the application is as follows: when the test of 8 static loads of case roof beam is carried out to needs is experimental, at first place case roof beam 8 in the holding tank 7 of seting up on test bench 1, start first motor 6 afterwards, the height of test bench 1 is adjusted to drive adjustment mechanism 2, at 8 top butt reaction jacks 10 of case roof beam, utilize the crossbeam 12 that reaction jacks 10 are connected simultaneously, connect the steel strand wires 13 at crossbeam 12 both ends and pre-buried in the structure combination formation counter-force mechanism 9 of the anchor pile 14 on ground, counter-force mechanism 9 exerts the counter-force to case roof beam 8 and accomplishes the experiment.
Claims (8)
1. The utility model provides a highway case roof beam static test device, is including test bench (1) that is used for supporting case roof beam (8), its characterized in that: test pedestal (1) below is equipped with adjustment mechanism (2) that are used for adjusting test pedestal (1) height, case roof beam (8) are placed in test pedestal (1) top, case roof beam (8) top is equipped with and is used for applying counter-force mechanism (9) to case roof beam (8), counter-force mechanism (9) include one end butt in counter-force jack (10) of case roof beam (8), crossbeam (12) of being connected with the counter-force jack (10) other end, pre-buried in anchor pile (14) on ground and steel strand wires (13) of connecting crossbeam (12) and anchor pile (14).
2. The highway box girder static load test device according to claim 1, wherein: one end of the steel strand (13) is connected to the anchor pile (14), the other end of the steel strand penetrates through the cross beam (12), the penetrating end of the steel strand is connected with a penetrating jack (15), and the penetrating jack (15) is connected to the cross beam (12).
3. The highway box girder static load test device according to claim 1, wherein: adjustment mechanism (2) are including adjusting base (3), be equipped with first motor (6) and adjust base (3) on adjusting base (3) and be located the below of test bench (1), the output shaft of first motor (6) has lead screw (5), lead screw (5) extend along vertical direction, be equipped with the screw through-hole of cooperation lead screw (5) on test bench (1), lead screw (5) threaded connection is in test bench (1).
4. The highway box girder static load test device according to claim 1, wherein: be equipped with holding tank (7) that are used for holding case roof beam (8) on test pedestal (1), case roof beam (8) base inlays and locates in holding tank (7).
5. The highway box girder static load test device according to claim 1, wherein: the counter-force mechanism (9) comprises a counter-force jack (10), the counter-force jack (10) is installed on the cross beam (12), and the top end of the counter-force jack (10) is abutted to the center of the box girder (8).
6. The highway box girder static load test device according to claim 5, wherein: be equipped with the locating part that is used for centre gripping reaction jack (10) on crossbeam (12), the locating part includes sliding connection on crossbeam (12) and perpendicular to crossbeam (12) first limiting plate (19), second limiting plate (20) and is used for adjusting two-way lead screw (23) of first limiting plate (19) and second limiting plate (20) relative distance, all offer on first limiting plate (19) and second limiting plate (20) with two-way lead screw (23) complex screw through-hole, be equipped with on crossbeam (12) and be used for driving two-way lead screw (23) pivoted second motor (24).
7. The highway box girder static load test device according to claim 5, wherein: reaction jack (10) and case roof beam (8) butt department are equipped with contact plate (11) that are used for increasing reaction jack (10) and case roof beam (8) area of contact, contact plate (11) one side is connected on reaction jack (10), and the opposite side butt is in case roof beam (8).
8. The highway box girder static load test device according to claim 1, wherein: crossbeam (12) divide into and level and smooth section (16) and dismantle section (17), level and level section (16) both ends and be equipped with the screw hole, be equipped with on dismantling section (17) and be used for cooperating fixed strip (18) of screw hole, it has screw rod and screw rod to wear out end threaded connection in the threaded hole of leveling section (16) to alternate on fixed strip (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120156261.8U CN214503144U (en) | 2021-01-20 | 2021-01-20 | Highway box girder static load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120156261.8U CN214503144U (en) | 2021-01-20 | 2021-01-20 | Highway box girder static load test device |
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| Publication Number | Publication Date |
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| CN214503144U true CN214503144U (en) | 2021-10-26 |
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| CN202120156261.8U Active CN214503144U (en) | 2021-01-20 | 2021-01-20 | Highway box girder static load test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117388082A (en) * | 2023-12-12 | 2024-01-12 | 西南交通大学 | Forward-pulling type tunnel anchor indoor test model and test method |
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2021
- 2021-01-20 CN CN202120156261.8U patent/CN214503144U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117388082A (en) * | 2023-12-12 | 2024-01-12 | 西南交通大学 | Forward-pulling type tunnel anchor indoor test model and test method |
| CN117388082B (en) * | 2023-12-12 | 2024-03-05 | 西南交通大学 | Forward-pulling type tunnel anchor indoor test model and test method |
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