CN117420035B - Bridge bearing capacity testing device - Google Patents
Bridge bearing capacity testing device Download PDFInfo
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- CN117420035B CN117420035B CN202311744008.4A CN202311744008A CN117420035B CN 117420035 B CN117420035 B CN 117420035B CN 202311744008 A CN202311744008 A CN 202311744008A CN 117420035 B CN117420035 B CN 117420035B
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- 238000012360 testing method Methods 0.000 title claims abstract description 110
- 238000001514 detection method Methods 0.000 claims abstract description 77
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 25
- 239000000049 pigment Substances 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000000994 depressogenic effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0652—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors using contrasting ink, painting, staining
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of bridge testing, in particular to a bridge bearing capacity testing device which comprises a testing table, a bridge foundation and a testing vehicle, wherein the upper end of the testing table is provided with an accommodating groove along the length direction, the bridge foundation is placed in the accommodating groove, the testing vehicle linearly moves along the accommodating groove, the upper end of the testing table is fixedly provided with a supporting frame, the tops of the two ends of the supporting frame are fixedly provided with driving oil cylinders, the output ends of the driving oil cylinders are fixedly connected with a cross beam, the two sides of the cross beam are provided with electric guide rails, the top end of the testing vehicle is in sliding fit with the electric guide rails, the front end of the testing vehicle is provided with a crank transmission assembly and a hammer pressure assembly, and the testing vehicle is internally provided with a detection assembly. According to the invention, the driving crankshaft is matched with the lifting frame, so that the two groups of impact hammers are driven to perform hammering actions repeatedly and alternately up and down, and the uniform linear travelling process of the test vehicle is matched, so that equidistant hammering of multiple points on the bridge foundation can be realized, and the comprehensiveness and accuracy of the test result are improved.
Description
Technical Field
The invention relates to the technical field of bridge testing, in particular to a bridge bearing capacity testing device.
Background
Bridge loads refer to a collective term for various possible loads that should be considered in bridge structural design, including constant load, live load, and other loads. Including railway train live load or road vehicle load, impact force, centrifugal force, lateral swinging force (railway train), braking force or traction force, crowd load, soil pressure proliferated by train vehicles, etc. caused by them.
The load bearing capacity test is generally required to be performed on a bridge subgrade sample before the bridge construction engineering begins. The bridge bearing capacity test adopts a pressure contact mode to test, the existing test device usually carries out local pressure aiming at a certain point of the bridge, the pressure contact mode is single, the bearing capacity of the bridge cannot be comprehensively judged, and the test process is incomplete.
Disclosure of Invention
The invention aims to provide a bridge bearing capacity testing device which aims to solve the technical problems.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a bridge bearing capacity testing arrangement, includes testboard, bridge foundation and test car, the testboard upper end is provided with the holding tank along length direction, the bridge foundation is placed in the holding tank, the test car advances along the holding tank straight line, the testboard upper end is fixedly provided with support frame, the top fixed mounting at support frame both ends has a driving cylinder, driving cylinder output fixedly connected with crossbeam, the both sides of crossbeam are provided with electric guide rail, test car top and electric guide rail sliding fit, the test car front end is provided with crank drive subassembly and hammer pressure subassembly, be provided with detection assembly in the test car.
The crank transmission assembly comprises a crank shaft, two ends of the crank shaft are rotatably mounted on a crank shaft support, the crank shaft support is fixedly connected with a test vehicle, two sections of driving crank shafts are arranged on the crank shaft and are centrosymmetric, each section of driving crank shaft is in transmission fit with a corresponding hammer pressing assembly, the hammer pressing assembly comprises a lifting frame, a crank shaft sliding sleeve is arranged on the outer side of the driving crank shaft, the crank shaft sliding sleeve is in sliding fit with the corresponding lifting frame, a limiting rod is fixedly connected to the bottom of the lifting frame, and an impact hammer is arranged at the bottom of the limiting rod.
The detection assembly comprises a lifting plate, detection barrels and detection rods, the detection barrels are symmetrically and fixedly arranged at the upper ends of the lifting plate, end covers are arranged at the top ends of the detection barrels, each detection barrel is internally and coaxially provided with the detection rod in a penetrating mode, the detection rods are located in the same vertical plane with the corresponding limiting rods, the vertical plane coincides with the linear movement track of the test vehicle, the top ends of the detection rods are provided with baffle plates, detection gaskets are arranged at the upper ends of the baffle plates, and photoelectric switches which are arranged opposite to the detection gaskets are fixedly arranged on the test vehicle.
As a further scheme of the invention: the test vehicle comprises a top plate, a bottom plate and a mounting plate, wherein the top plate is fixedly connected with the bottom plate through a bracket, the mounting plate is fixedly mounted on the bracket, two sides of the top plate are in sliding fit with an electric sliding rail, and travelling wheels are arranged at four corners of the bottom plate.
As a further scheme of the invention: the photoelectric switch is fixedly arranged at the bottom of the mounting plate, a pressure spring is arranged between the baffle and the mounting plate, a sliding seal seat is arranged at the bottom of the detection rod and used for sliding sealing a discharge hole at the bottom of the detection cylinder, and a ball is arranged at the bottom of the sliding seal seat in a rolling manner.
As a further scheme of the invention: guide rods are fixedly arranged on two sides of the upper end of the bottom plate, the guide rods penetrate through two ends of the lifting plate in a sliding mode, a lifting motor is fixedly arranged at the upper end of the mounting plate, the output end of the lifting motor is connected with a lifting screw rod, and threads of the lifting screw rod penetrate through the lifting plate.
As a further scheme of the invention: the utility model discloses a lifting device, including mounting panel, mounting panel upper end fixed mounting, the mounting panel is provided with the balancing weight, still be provided with locking Assembly on the mounting panel, locking Assembly includes lifting support and lifting cylinder, the fixed setting of lifting cylinder is on the mounting panel, lifting cylinder output is connected with the lifting support, lifting support both ends fixedly connected with location keeps off the fork, the location keeps off the fork and inserts and locate the gag lever post outside, just the location keeps off the fork and is located the baffle below.
As a further scheme of the invention: the crank transmission assembly further comprises a driving motor, the driving motor is fixedly arranged on the mounting plate, the output end of the driving motor is connected with a driving wheel, counterweight wheels are symmetrically arranged at two ends of the crank shaft, a driving wheel is arranged at one end of the crank shaft, and the driving wheel is connected with the driving wheel through a driving belt.
As a further scheme of the invention: the front end of the test vehicle is fixedly connected with a limiting plate, a limiting hole is formed in the limiting plate in a penetrating mode, and the limiting rod is arranged in the corresponding limiting hole in a sliding penetrating mode.
As a further scheme of the invention: the jump bit top is provided with the connecting seat, the connecting seat can be dismantled with the gag lever post bottom and be connected.
The invention has the beneficial effects that:
(1) Through setting up bent axle drive assembly and hammer and press the subassembly, utilize driving crank axle and lifting frame to cooperate, the crank axle is at the rotation in-process, two sections driving crank axle will realize crank drive process with lifting frame respectively, thereby drive two sets of jump hammers of bottom through the gag lever post and go on from top to bottom alternately the hammering action, and the uniform velocity straight line process of marcing of cooperation test car, can realize carrying out the equidistance hammering of multiple spot position to the bridge foundation, simultaneously because driving crank axle drives two sets of lifting frame and keeps unanimously from top to bottom alternately, the uniformity of two sets of jump hammers hammering dynamics has been guaranteed, be favorable to improving test result's comprehensiveness and accuracy.
(2) Through setting up detection component, after the hammer press subassembly carries out the equidistant hammering of multiple spot position to the bridge foundation, two sets of detection section of thick bamboo will be along corresponding straight line orbit respectively along with the test survey, this in-process, detect the pole bottom and will remain all the time to lean on in the surface of bridge foundation, when the sunken position after the hammer press is passed through to the pole to the detection pole, detect the gasket and will descend in step this moment, and detect the displacement distance of gasket by photoelectric switch monitoring, the degree of concavity of this sunken position is known according to the displacement distance of detection gasket, and the intensity of this bridge foundation is comprehensively judged to the testing result through multiple spot position, in order to realize the accurate bearing capacity test procedure of bridge foundation.
(3) When the testing cylinder carries out rectilinear movement's in-process along with the test vehicle, the baffle receives compression action of compression spring, will apply decurrent effort to the testing rod all the time, make the ball of testing rod bottom support all the time on leaning on the ball, the ball also will carry out sharp roll all the time on bridge foundation surface, when the testing rod passes through the sunken position, the slide bar descends along the depressed place under compression spring's effort this moment, slide seal seat synchronous downward displacement is until deviate from testing cylinder bottom discharge gate, liquid pigment flows out with the situation this moment, thereby can mark the sunken position, the concrete position of convenient visual discernment sunken position, when the testing rod did not pass through sunken position, slide seal seat seals the discharge gate of testing cylinder bottom this moment, prevent liquid pigment outflow in order to avoid the pigment extravagant, thereby realized the automatic marking process of sunken position.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic diagram of a test vehicle according to the present invention.
Fig. 3 is a schematic view of the crank drive assembly of the present invention.
Fig. 4 is a schematic structural view of a crank shaft in the present invention.
Fig. 5 is a schematic structural view of the hammer press assembly according to the present invention.
Fig. 6 is a schematic view of the structure of the detection assembly and the locking assembly of the present invention.
FIG. 7 is a schematic view showing the internal structure of the cartridge according to the present invention.
Fig. 8 is a schematic view of the state of the bridge Liang Deji of the present invention after being pressed by a hammer.
In the figure: 1. a test bench; 101. a receiving groove; 102. a support frame; 103. a driving oil cylinder; 2. bridge foundation; 3. a cross beam; 301. an electric guide rail; 4. a test carriage; 401. a top plate; 402. a bottom plate; 4021. a guide rod; 403. a mounting plate; 404. a walking wheel; 405. a limiting plate; 4051. a limiting hole; 5. a crank drive assembly; 501. a crank shaft; 5011. driving a crankshaft; 5012. a crankshaft sliding sleeve; 502. a crankshaft bracket; 503. a driving wheel; 504. a driving motor; 505. a driving wheel; 506. a transmission belt; 507. a counterweight wheel; 6. a hammer press assembly; 601. a lifting frame; 602. a limit rod; 603. a percussion hammer; 604. a connecting seat; 7. a detection assembly; 701. a lifting plate; 702. a detection cylinder; 703. an end cap; 704. a detection rod; 7041. a sliding seal seat; 7042. a ball; 705. a lifting motor; 706. lifting screw rods; 707. a baffle; 708. detecting a gasket; 709. an optoelectronic switch; 710. a pressure spring; 8. balancing weight; 9. a locking assembly; 901. lifting the bracket; 902. positioning a blocking fork; 903. lifting the cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, a bridge bearing capacity testing device comprises a test bench 1, a bridge foundation 2 and a test carriage 4, wherein an accommodating groove 101 is formed in the upper end of the test bench 1 along the length direction, the bridge foundation 2 is placed in the accommodating groove 101, the test carriage 4 linearly advances along the accommodating groove 101, a support frame 102 is fixedly arranged at the upper end of the test bench 1, driving oil cylinders 103 are fixedly arranged at the tops of two ends of the support frame 102, the output ends of the driving oil cylinders 103 are fixedly connected with a cross beam 3, electric guide rails 301 are arranged on two sides of the cross beam 3, the top end of the test carriage 4 is in sliding fit with the electric guide rails 301, a crank transmission assembly 5 and a hammer pressing assembly 6 are arranged at the front end of the test carriage 4, and a detection assembly 7 is arranged in the test carriage 4.
Specifically, during testing, the bridge foundation 2 sample to be tested is placed in the accommodating groove 101, before the test vehicle 4 is lifted by the cross beam 3, enough space is provided for paving the bridge foundation 2, after the bridge foundation 2 is paved, the cross beam 3 is controlled to descend through the driving oil cylinder 103 until the test vehicle 4 stably lands on the test table 1, then the electric guide rail 301 is utilized to control the test vehicle 4 to linearly travel along the accommodating groove 101 at a uniform speed, in the process, the hammer pressure assembly 6 can perform equidistant multi-point hammer pressure testing on the surface of the bridge foundation 2, meanwhile, the detection assembly 7 can detect points after hammer pressure, and the bearing capacity of the bridge foundation 2 is comprehensively judged through the sinking degree of a plurality of hammer pressure points.
As shown in fig. 3, fig. 4 and fig. 5, the crank transmission assembly 5 includes a crank shaft 501, two ends of the crank shaft 501 are rotatably mounted on a crank shaft bracket 502, the crank shaft bracket 502 is fixedly connected with a test vehicle 4, two sections of driving crank shafts 5011 are arranged on the crank shaft 501 and are centrosymmetric, each section of driving crank shaft 5011 is in driving fit with a corresponding hammer pressing assembly 6, the hammer pressing assembly 6 includes a lifting frame 601, a crank shaft sliding sleeve 5012 is arranged on the outer side of the driving crank shaft 5011, the crank shaft sliding sleeve 5012 is in sliding fit with the corresponding lifting frame 601, a limiting rod 602 is fixedly connected to the bottom of the lifting frame 601, and an impact hammer 603 is arranged at the bottom of the limiting rod 602.
Specifically, in order to realize the equidistant even hammer pressure of multiple spot positions to bridge foundation 2, utilize driving crankshaft 5011 to cooperate with lifting frame 601, the crank axle 501 is in the rotation in-process, two sections driving crankshaft 5011 will realize crank transmission process with lifting frame 601 respectively, thereby drive two sets of impact hammers 603 of bottom through gag lever post 602 and go on the hammering action of repetition alternation from top to bottom, and the uniform velocity straight line process of marcing of cooperation test car 4, can realize carrying out the equidistant hammering of multiple spot positions to bridge foundation 2, simultaneously because driving crankshaft 5011 drives the lifting distance that two sets of lifting frame 601 are alternated from top to bottom keeps unanimously, guaranteed the uniformity of two sets of impact hammers 603 hammering dynamics, be favorable to improving the accuracy of test result.
As shown in fig. 6 and 7, the detection assembly 7 includes a lifting plate 701, a detection cylinder 702 and a detection rod 704, the detection cylinder 702 is symmetrically and fixedly arranged at the upper end of the lifting plate 701, an end cover 703 is arranged at the top end of the detection cylinder 702, the detection rod 704 is coaxially and penetratingly arranged in each detection cylinder 702, the detection rod 704 and the corresponding limit rod 602 are positioned in the same vertical plane, the vertical plane coincides with the linear movement track of the test carriage 4, a baffle 707 is arranged at the top end of the detection rod 704, a detection gasket 708 is arranged at the upper end of the baffle 707, and a photoelectric switch 709 opposite to the detection gasket 708 is fixedly arranged on the test carriage 4.
Specifically, by setting the detection assembly 7, after the hammering assembly 6 performs multi-point equidistant hammering on the bridge foundation 2, the two groups of detection cylinders 702 will move along corresponding linear tracks along with the test measurement respectively, as shown in fig. 8, in this process, the bottom of the detection rod 704 will always keep against the surface of the bridge foundation 2, when the detection rod 704 passes through the recessed point after hammering, the detection rod 704 moves downward in a forward direction, at this moment, the detection gaskets 708 will synchronously descend, and the displacement distance of the detection gaskets 708 is monitored by the photoelectric switch 709, the degree of recession of the recessed point is obtained according to the displacement distance of the detection gaskets 708, and the strength of the bridge foundation 2 is comprehensively judged through the detection result of the multi-point to realize the accurate bearing capacity test process of the bridge foundation 2.
As shown in fig. 2, the test carriage 4 includes a top plate 401, a bottom plate 402 and a mounting plate 403, the top plate 401 and the bottom plate 402 are fixedly connected by a bracket, the mounting plate 403 is fixedly mounted on the bracket, two sides of the top plate 401 are in sliding fit with the electric guide rail 301, and travelling wheels 404 are distributed at four corners of the bottom plate 402.
As shown in fig. 6, the photoelectric switch 709 is fixedly arranged at the bottom of the mounting plate 403, a pressure spring 710 is arranged between the baffle 707 and the mounting plate 403, a sliding seal seat 7041 is arranged at the bottom of the detecting rod 704, the sliding seal seat 7041 is used for sliding sealing a discharge hole at the bottom of the detecting cylinder 702, and a ball 7042 is arranged at the bottom of the sliding seal seat 7041 in a rolling manner.
Specifically, in this embodiment, the detection cylinder 702 contains liquid pigment, when the detection cylinder 702 moves linearly along with the test vehicle 4, the baffle 707 receives the extrusion effect of the pressure spring 710, a downward acting force will be applied to the detection rod 704 all the time, so that the ball 7042 at the bottom of the detection rod 704 always abuts against the ball 7042, the ball 7042 will also roll linearly on the surface of the bridge foundation 2 all the time, when the detection rod 704 passes through the concave point, the sliding rod descends along the concave position under the acting force of the pressure spring 710, the sliding seal seat 7041 moves synchronously downwards until the liquid pigment is separated from the discharge hole at the bottom of the detection cylinder 702, at this time, the liquid pigment flows out smoothly, thereby marking the concave point, the specific position of the concave point can be identified conveniently and intuitively, and when the detection rod 704 does not pass through the concave point, the sliding seal seat 7041 seals the discharge hole at the bottom of the detection cylinder 702, the liquid pigment is prevented from flowing out, so that pigment waste is avoided, and an automatic marking process of the concave point is realized.
As shown in fig. 6, guide rods 4021 are fixedly arranged on two sides of the upper end of the bottom plate 402, the guide rods 4021 penetrate through two ends of the lifting plate 701 in a sliding manner, a lifting motor 705 is fixedly arranged on the upper end of the mounting plate 403, the output end of the lifting motor 705 is connected with a lifting screw 706, and the lifting screw 706 penetrates through the lifting plate 701 in a threaded manner.
Specifically, when the lifting motor 705 is started, the lifting screw 706 is driven to rotate, so as to drive the lifting plate 701 to lift up and down along the guide rods 4021 at two ends, so as to adjust the initial heights of the lifting plate 701 and the detection cylinder 702, and thus the ball 7042 at the bottom of the detection rod 704 can smoothly roll on the surface of the bridge foundation 2, so as to adapt to test samples with different thicknesses.
As shown in fig. 6, a balancing weight 8 is fixedly arranged at the upper end of the mounting plate 403, a locking assembly 9 is further arranged on the mounting plate 403, the locking assembly 9 comprises a lifting bracket 901 and a lifting cylinder 903, the lifting cylinder 903 is fixedly arranged on the mounting plate 403, the output end of the lifting cylinder 903 is connected with the lifting bracket 901, two ends of the lifting bracket 901 are fixedly connected with positioning retaining forks 902, the positioning retaining forks 902 are inserted in the outer sides of the limiting rods 602, and the positioning retaining forks 902 are positioned below the baffle 707.
Specifically, the counterweight 8 is used to increase the rotational inertia of the crankshaft 501 to enhance the hammering force of the impact hammer 603 during the down-pressing hammering; before testing, since the test carriage 4 needs to be lifted through the cross beam 3 to adjust the height of the test space, in order to avoid pigment leakage caused by downward displacement of the test rod 704 at the moment, the test rod 704 needs to be blocked and limited, the lifting bracket 901 is lifted upwards by using the lifting cylinder 903, and meanwhile, the positioning retaining forks 902 at two ends lift the baffle 707 from the bottom so as to block and restrict the downward displacement process of the limiting rod 602, so that the sliding sealing seat 7041 at the bottom of the test rod 704 is ensured not to be separated from the discharge hole at the bottom of the test cylinder 702, and pigment leakage is prevented.
As shown in fig. 3, the crank transmission assembly 5 further includes a driving motor 504, the driving motor 504 is fixedly disposed on the mounting plate 403, an output end of the driving motor 504 is connected with a driving wheel 505, two ends of the crank shaft 501 are symmetrically provided with counterweight wheels 507, one end of the crank shaft 501 is provided with a driving wheel 503, and the driving wheel 505 is connected with the driving wheel 503 through a driving belt 506.
Further, the front end of the test carriage 4 is fixedly connected with a limiting plate 405, a limiting hole 4051 is formed in the limiting plate 405 in a penetrating manner, and the limiting rod 602 is arranged in the corresponding limiting hole 4051 in a sliding manner.
Specifically, in the hammer test process, the driving motor 504 drives the driving wheel 505 to rotate, the driving wheel 505 drives the crank shaft 501 to rotate through the driving belt 506 and the driving wheel 503, and in the rotation process of the crank shaft 501, the crank shaft 5011 is driven by two sections and the crank transmission process of the lifting frame 601 is utilized, so that the lifting frame 601 drives the stop lever 602 to realize up-and-down reciprocating alternate motion, thereby driving the impact hammer 603 to realize equidistant hammer process, and in the process, the stop lever 602 always keeps up-and-down sliding in the stop hole 4051, so that balance stability of the stop lever 602 and the impact hammer 603 in the hammer process is ensured, and the accuracy of the hammer position is improved.
As shown in fig. 5, a connecting seat 604 is provided at the top of the impact hammer 603, and the connecting seat 604 is detachably connected with the bottom of the limiting rod 602, so as to facilitate replacement of the impact hammers 603 with different weights, thereby adjusting the hammer pressure in the hammer pressure test.
The working principle of the invention is as follows: as shown in fig. 1-8, before the test, the test carriage 4 is lifted by the cross beam 3 to provide enough space for laying the bridge foundation 2, meanwhile, the lifting support 901 is lifted upwards by the lifting air cylinder 903, the positioning retaining forks 902 at two ends lift the retaining plates 707 from the bottom, so as to block and restrict the downward displacement process of the limiting rod 602, ensure that the sliding seal seat 7041 at the bottom of the test rod 704 cannot be separated from the discharge hole at the bottom of the test cylinder 702, and further prevent pigment from leaking. After the bridge foundation 2 is laid, the beam 3 is controlled to descend through the driving oil cylinder 103 until the test carriage 4 stably lands on the test bench 1, then the electric guide rail 301 is utilized to control the test carriage 4 to linearly travel along the accommodating groove 101 at a uniform speed, in the process, the driving motor 504 drives the driving wheel 505 to rotate, the driving wheel 505 drives the crank shaft 501 to rotate through the driving belt 506 and the driving wheel 503, and the crank shaft 501 drives the crank shaft 5011 and the lifting frame 601 to realize up-down reciprocating alternation by utilizing the crank transmission process of the two sections of driving crank shafts 5011 and the lifting frame 601, so that the impact hammer 603 is driven to realize the equidistant hammer pressing process. When the hammer pressing assembly 6 hammers the bridge foundation 2 at multiple points at equal intervals, the two groups of detection cylinders 702 move along corresponding linear tracks along with the test, the bottom of the detection rod 704 always keeps abutting against the surface of the bridge foundation 2, when the detection rod 704 passes through the depressed points after hammer pressing, the detection rod 704 moves downwards in a proper direction, the detection gaskets 708 synchronously descend, the displacement distance of the detection gaskets 708 is monitored by the photoelectric switch 709, the depressed degree of the depressed points is obtained according to the displacement distance of the detection gaskets 708, the strength of the bridge foundation 2 is comprehensively judged through the detection results of multiple points, so that the accurate bearing capacity test process of the bridge foundation 2 is realized, meanwhile, the sliding sealing seat 7041 moves downwards synchronously until the liquid pigment is separated from the discharge port at the bottom of the detection cylinder 702, the depressed points can be marked, the specific positions of the depressed points can be conveniently and intuitively identified, and the automatic marking process of the depressed points is realized.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. The utility model provides a bridge bearing capacity testing arrangement, includes testboard (1), bridge foundation (2) and test car (4), testboard (1) upper end is provided with holding tank (101) along length direction, bridge foundation (2) are placed in holding tank (101), test car (4) are followed holding tank (101) straight line and are advanced, a serial communication port, testboard (1) upper end is fixed with support frame (102), the top fixed mounting at support frame (102) both ends has driving cylinder (103), driving cylinder (103) output fixedly connected with crossbeam (3), the both sides of crossbeam (3) are provided with electric rail (301), test car (4) top and electric rail (301) sliding fit, test car (4) front end is provided with crank drive subassembly (5) and hammer pressure subassembly (6), be provided with in test car (4) and detect subassembly (7);
the crank transmission assembly (5) comprises a crank shaft (501), two ends of the crank shaft (501) are rotatably arranged on a crank shaft bracket (502), the crank shaft bracket (502) is fixedly connected with a test vehicle (4), two sections of driving crankshafts (5011) are arranged on the crank shaft (501), the two sections of driving crankshafts (5011) are in central symmetry, each section of driving crankshafts (5011) is in driving fit with a corresponding hammering assembly (6), the hammering assembly (6) comprises a lifting frame (601), a crank shaft sliding sleeve (5012) is arranged on the outer side of the driving crankshafts (5011), the crank shaft sliding sleeve (5012) is in sliding fit with the corresponding lifting frame (601), a limiting rod (602) is fixedly connected to the bottom of the lifting frame (601), and an impact hammer (603) is arranged at the bottom of the limiting rod (602).
The detection assembly (7) comprises a lifting plate (701), detection barrels (702) and detection rods (704), the detection barrels (702) are symmetrically and fixedly arranged at the upper ends of the lifting plate (701), end covers (703) are arranged at the top ends of the detection barrels (702), each detection barrel (702) is internally and coaxially penetrated with the detection rods (704), the detection rods (704) and the corresponding limiting rods (602) are located in the same vertical plane, the vertical plane coincides with the linear movement track of the test vehicle (4), a baffle (707) is arranged at the top ends of the detection rods (704), detection gaskets (708) are arranged at the upper ends of the baffle (707), and photoelectric switches (709) which are arranged opposite to the detection gaskets (708) are fixedly arranged on the test vehicle (4).
2. The bridge bearing capacity testing device according to claim 1, wherein the testing vehicle (4) comprises a top plate (401), a bottom plate (402) and a mounting plate (403), the top plate (401) and the bottom plate (402) are fixedly connected through a bracket, the mounting plate (403) is fixedly mounted on the bracket, two sides of the top plate (401) are in sliding fit with the electric guide rail (301), and travelling wheels (404) are arranged at four corners of the bottom plate (402).
3. The bridge bearing capacity testing device according to claim 2, wherein the photoelectric switch (709) is fixedly arranged at the bottom of the mounting plate (403), a pressure spring (710) is arranged between the baffle (707) and the mounting plate (403), a sliding seal seat (7041) is arranged at the bottom of the detection rod (704), the sliding seal seat (7041) is used for sliding sealing a discharge hole at the bottom of the detection cylinder (702), and balls (7042) are arranged at the bottom of the sliding seal seat (7041) in a rolling mode.
4. A bridge bearing capacity testing device according to claim 3, wherein guide rods (4021) are fixedly arranged on two sides of the upper end of the bottom plate (402), the guide rods (4021) penetrate through two ends of the lifting plate (701) in a sliding mode, a lifting motor (705) is fixedly arranged at the upper end of the mounting plate (403), an output end of the lifting motor (705) is connected with a lifting screw (706), and threads of the lifting screw (706) penetrate through the lifting plate (701).
5. The bridge bearing capacity testing device according to claim 2, wherein a balancing weight (8) is fixed at the upper end of the mounting plate (403), a locking assembly (9) is further arranged on the mounting plate (403), the locking assembly (9) comprises a lifting bracket (901) and a lifting cylinder (903), the lifting cylinder (903) is fixedly arranged on the mounting plate (403), the output end of the lifting cylinder (903) is connected with the lifting bracket (901), positioning blocking forks (902) are fixedly connected at two ends of the lifting bracket (901), the positioning blocking forks (902) are inserted in the outer side of the limiting rods (602), and the positioning blocking forks (902) are located below the baffle plates (707).
6. The bridge bearing capacity testing device according to claim 2, wherein the crank transmission assembly (5) further comprises a driving motor (504), the driving motor (504) is fixedly arranged on the mounting plate (403), the output end of the driving motor (504) is connected with a driving wheel (505), two ends of the crank shaft (501) are symmetrically provided with counterweight wheels (507), one end of the crank shaft (501) is provided with a driving wheel (503), and the driving wheel (505) is connected with the driving wheel (503) through a driving belt (506).
7. The bridge bearing capacity testing device according to claim 2, wherein the front end of the testing vehicle (4) is fixedly connected with a limiting plate (405), a limiting hole (4051) is formed in the limiting plate (405) in a penetrating manner, and the limiting rod (602) is arranged in the corresponding limiting hole (4051) in a sliding manner.
8. The bridge bearing capacity testing device according to claim 1, wherein a connecting seat (604) is arranged at the top end of the impact hammer (603), and the connecting seat (604) is detachably connected with the bottom end of the limiting rod (602).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311744008.4A CN117420035B (en) | 2023-12-19 | 2023-12-19 | Bridge bearing capacity testing device |
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| CN202311744008.4A CN117420035B (en) | 2023-12-19 | 2023-12-19 | Bridge bearing capacity testing device |
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