CN114923717B - Tunnel engineering full-scale test antifriction follow-up platform - Google Patents
Tunnel engineering full-scale test antifriction follow-up platform Download PDFInfo
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- CN114923717B CN114923717B CN202210451006.5A CN202210451006A CN114923717B CN 114923717 B CN114923717 B CN 114923717B CN 202210451006 A CN202210451006 A CN 202210451006A CN 114923717 B CN114923717 B CN 114923717B
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 230000000694 effects Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004264 Petrolatum Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a friction-reducing follow-up platform for a tunnel engineering full-scale test, which comprises a bottom plate and a top plate, wherein a plurality of universal balls are embedded at the top of the bottom plate, the top plate is supported by the plurality of universal balls, and the top plate is used for placing a sample. In the loading process, the to-be-tested sample and the top plate freely move along with the loading deformation of the sample, so that the influence of friction effect generated by the contact surface of the to-be-tested sample and the platform due to the dead weight of the sample on the test result is avoided.
Description
Technical Field
The invention belongs to the field of indoor mechanical test devices of tunnel engineering, and particularly relates to a antifriction follow-up platform for a full-scale test of tunnel engineering.
Background
In the field of a mechanical test device in a tunnel engineering room, the physical model table has the advantages of controllable test conditions, repeatable test results and more close to actual load and displacement boundary conditions of an engineering structure, so that the physical model test with similar proportion, especially the full-scale test, is developed, and is one of important means for researching mechanical characteristics of the tunnel engineering structure, but the physical model test which involves horizontal loading and deformation inevitably faces the problem that factors such as self weight of the test device, self weight of a sample, action of a loading device and the like cause friction at the bottom of the sample so as to bring about adverse effects on the test results, especially the problem that the adverse effects brought by the long-term loading in the full-scale test and the loading under the large deformation condition cannot be ignored. In general, the dead weight of the sample and its contact with the test bed are objective, and the adverse effects of such factors can only be reduced by reducing the coefficient of friction of the contact surface or adjusting the contact surface. The conventional technical measures have the following problems:
(1) The manner in which the lubricating oil or petrolatum is applied is limited in the extent to which the friction effect on the rough contact surface is relieved. After the test bed is smeared with lubricating oil or vaseline, a large amount of greasy dirt is easy to accumulate, and the cleaning is difficult.
(2) Some existing precision test-bed or special test-bed can reduce the friction effect, but for large tonnage lining ring samples in the tunnel engineering field, the friction-reducing platform is lack, and the cost is relatively high.
(3) Part of researchers realize low-friction bearing by using rollers, but after long-time use, waste residues and ash generated by geotechnical tests can influence antifriction performance of the low-friction bearing, hoisting and position calibration functional requirements of large-tonnage lining ring samples of tunnel engineering are difficult to adapt.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a antifriction follow-up platform for a full-scale test of tunnel engineering.
In order to achieve the above object, the present invention is realized by the following technical scheme:
the embodiment of the invention provides a friction-reducing follow-up platform for a full-scale test of tunnel engineering, which comprises a bottom plate and a top plate, wherein a plurality of universal balls are embedded at the top of the bottom plate, the top plate is supported by the plurality of universal balls, and the top plate is used for placing a sample.
As a further technical scheme, the bottom plate is also provided with a centering device, and the centering device drives the top plate to move relative to the bottom plate so as to realize centering.
As a further technical scheme, the centering device is a screw nut driving device.
As a further technical scheme, the centering device comprises a plurality of centering devices, and the plurality of centering devices are arranged along the circumferential direction of the bottom plate.
As a further technical scheme, a sample position adjusting device is also arranged on the top plate.
As a further technical scheme, the sample position adjusting device comprises a plurality of sample position adjusting devices, and the plurality of sample position adjusting devices are uniformly arranged along the circumferential direction of the top plate.
As a further technical scheme, the sample position adjusting device is a screw nut driving device.
As a further technical scheme, the top plate is also provided with a lifting lug.
As a further technical scheme, the sample position adjusting device is arranged on the lifting lug.
As a further technical scheme, the bottom edge of the top plate is provided with a limiting protrusion, the limiting protrusion extends downwards, and a certain gap is reserved between the limiting protrusion and the bottom plate.
The beneficial effects of the embodiment of the invention are as follows:
1. according to the invention, the top plate is buckled on the universal ball of the bottom plate, and the to-be-tested sample and the top plate freely move along with the loading deformation of the sample in the loading process, so that the influence of friction contact generated by the dead weight of the to-be-tested sample on a test result is avoided. The position of the top plate relative to the bottom plate can be adjusted by arranging the centering device, and the sample position adjusting device is used for calibrating the placing positions of the sample and the top plate during initial test.
2. The bottom edge of roof is equipped with spacing arch, spacing arch downwardly extending, reserve certain gap between and the bottom plate, be convenient for restrict the biggest movable range of roof, can play the clearance that isolated debris got into between roof and the hypoplastron simultaneously, and roof and bottom plate disconnect-type design, simple structure can be convenient for hoist and mount, clearance.
3. The lifting lug is arranged on the top plate, so that the requirement that the large-scale sample is further lifted to a test platform after being directly prepared on the top plate can be met, and the test preparation time is saved.
4. The invention effectively solves the adverse effect on the deformation and loading of the sample caused by the friction effect generated on the contact surface of the sample and the platform due to the dead weight of the sample, the dead weight of the platform and the dead weight of the loading mechanism in the prior art.
5. A plurality of universal ball notches are reserved on the bottom plate, and the requirements of the number and arrangement modes of the universal balls under different test working conditions can be met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a vertical cross-section of a tunnel engineering full-scale test antifriction follow-up platform disclosed by the invention;
FIG. 2 is a schematic illustration of the installation of a loading device on the basis of FIG. 1;
FIG. 3 is a schematic diagram illustrating the use of the follower platform in a loaded state according to the present invention;
in the figure: 1 bottom plate, 2 roof, 3 lead screw adjusting device, 4 lead screw adjusting device, 5 lug, 6 universal ball.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as introduced by the background art, the invention provides a antifriction follow-up platform for a full-scale test of tunnel engineering, which aims to solve the technical problems.
In a typical implementation mode of the invention, as shown in fig. 1, 2 and 3, the tunnel engineering full-scale test antifriction follow-up platform disclosed in the embodiment comprises a bottom plate 1 and a top plate 2, wherein a plurality of universal balls 6 are embedded on the bottom plate 1, the top plate 2 is supported by the plurality of universal balls 6, during test, a sample is arranged on the top plate supported by the plurality of universal balls, the sample is kept floating in the loading process, adverse effects on deformation and loading of the sample due to the self weight of the sample, the self weight of the platform and friction effect generated by the self weight of a loading mechanism on the contact surface of the sample and the platform are avoided, and the test result of the large-sized sample and the large-deformation loading condition is more accurate.
Further, in the present embodiment, the bottom plate 1 is a rectangular plate, and the top plate 2 is a circular ring, but the bottom plate 1 is not limited to a rectangle, and may be a circle; the top plate 2 is not limited to a circular ring shape, but may be other ring-shaped or non-ring-shaped structures. In this embodiment, two circles of universal balls 6 are arranged on the bottom plate 1, one circle is located on the inner ring, the other circle is located on the outer ring, and the top plate is supported by the two circles of universal balls 6.
Further, in this embodiment, a circle of screw adjusting device 3 is fixed on the bottom plate 1, the screw adjusting device 3 is connected with the top plate, the position of the top plate on the bottom plate 1 is adjusted by the screw adjusting device 3, so that the top plate 2 and the center of the bottom plate 1 are centered, specifically, a marking can be arranged on the bottom plate 1, and the relative position between the two can be calibrated by the marking. In the present embodiment, the screw adjusting means 3 includes a plurality of screw adjusting means 3 arranged along the circumferential direction of the top plate 2, and preferably, four screw adjusting means may be provided, which are disposed crosswise. Further, in this embodiment, reserve a plurality of universal ball notches on the bottom plate, can satisfy the demand to universal ball quantity and arrangement mode under the different experimental operating mode.
Further, in this embodiment, a screw adjusting device 4 is also disposed on the top plate 2, and the screw adjusting device 4 is used for adjusting the position of the sample placed on the top plate 2, so that the sample can be installed according to a preset position, specifically, a mark can be marked on the top plate to correct the position of the sample. An arc-shaped plate is arranged at the tail end of the screw rod adjusting device 4, and the arc-shaped plate is equal to the radian of the sample so as to match the sample.
It will be understood, of course, that the screw adjusting device 3, 4 may also be replaced by a linear drive mechanism such as a cylinder.
Further, in this embodiment, lead screw adjusting device 4 installs on lug 5, and the effect of lug 5 is mainly in order to realize sample and roof hoist and mount together, can satisfy the demand that further hoist and mount to test platform after the preparation of large-scale sample is directly accomplished on the roof, and test platform can also be as transporting hoist and mount platform promptly.
Further, in this embodiment, the edge position of the bottom of the top plate 2 is provided with a limiting protrusion, and the protrusion extends downwards, but does not contact with the bottom plate, and a certain gap is reserved between the protrusion and the bottom plate, so that on one hand, the maximum moving range of the top plate is limited, and meanwhile, the gap between the top plate and the lower plate can be isolated from sundries.
During the test, the bottom plate 1 imbeds laboratory ground to further fixed through rag bolt, as the base of model test, and bottom plate protrusion laboratory ground is high certainly, is convenient for clear up experimental debris, and the spacing arch of cooperation roof of being convenient for simultaneously, supplementary restriction roof maximum activity displacement. The top plate 2 is buckled on the bottom plate 1, the bottom surface is contacted with the universal ball embedded in the bottom plate, the top surface of the top plate 2 is used for supporting a sample to be tested, the top plate and the sample to be tested move together to deform in the loading process, adverse effects on deformation and loading of the sample due to the self weight of the sample, the self weight of the platform and the friction effect generated by the self weight of the loading mechanism on the contact surface of the sample and the platform are avoided, and the test result is more accurate under the conditions of large-scale sample and large deformation loading. The design of separating the top plate 2 from the bottom plate 1 can facilitate the transporting, lifting and cleaning of the sample.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The antifriction follow-up platform for the full-scale test of tunnel engineering is characterized by comprising a bottom plate and a top plate, wherein a plurality of universal balls are embedded on the bottom plate, the top plate is supported by the universal balls, and the top plate is used for placing a sample; the bottom plate on still be equipped with centering device, centering device drive roof for the bottom plate motion, realize centering, specific: a marking is arranged on the bottom plate, and the relative position between the marking and the bottom plate is calibrated through the marking; the centering device is a screw nut driving device;
the top plate is also provided with a sample position adjusting device, and the device is specifically: marking a marking line on the top plate to correct the position of the sample, wherein an arc-shaped plate is arranged at the tail end of the sample position adjusting device, the radian of the arc-shaped plate is equal to that of the sample so as to match the sample, and the sample position adjusting device is a screw nut driving device.
2. The tunnel engineering full-scale test antifriction follow-up platform of claim 1 wherein the centering means comprises a plurality of centering means uniformly disposed along the circumferential direction of the inner race of the top plate.
3. The tunnel engineering full-scale test antifriction follow-up platform of claim 1 wherein the sample position adjustment means comprises a plurality of sample position adjustment means disposed along the circumferential direction of the top plate.
4. The antifriction follow-up platform for the full-scale test of tunnel engineering according to claim 1, wherein the top plate is further provided with a lifting lug.
5. The antifriction follow-up platform for full-scale test of tunnel engineering according to claim 1, wherein a limiting protrusion is arranged at the bottom edge of the top plate, and extends downwards to reserve a certain gap with the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451006.5A CN114923717B (en) | 2022-04-24 | 2022-04-24 | Tunnel engineering full-scale test antifriction follow-up platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451006.5A CN114923717B (en) | 2022-04-24 | 2022-04-24 | Tunnel engineering full-scale test antifriction follow-up platform |
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| CN114923717A CN114923717A (en) | 2022-08-19 |
| CN114923717B true CN114923717B (en) | 2023-10-20 |
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| CN202210451006.5A Active CN114923717B (en) | 2022-04-24 | 2022-04-24 | Tunnel engineering full-scale test antifriction follow-up platform |
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| KR200290332Y1 (en) * | 2002-06-19 | 2002-09-26 | (주)삼원기술단 | Tunnel lining testing device |
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| CN109342151A (en) * | 2018-12-22 | 2019-02-15 | 福州大学 | Eliminate the horizontal tunnel model test device and test method of bottom friction |
| CN209363921U (en) * | 2018-12-29 | 2019-09-10 | 北京韩建河山管业股份有限公司 | In small-bore steel short tube assembly weld accessory cart |
| CN209387378U (en) * | 2018-12-22 | 2019-09-13 | 福州大学 | Eliminate the horizontal tunnel model test device of bottom friction |
| CN212391202U (en) * | 2020-03-09 | 2021-01-22 | 中铁十四局集团房桥有限公司 | Shield segment horizontal assembling test base and assembling test bed |
| KR20210078754A (en) * | 2019-12-19 | 2021-06-29 | 한국과학기술원 | Segment type ring burst test apparatus for mechanical properties evaluation of composite pressure vessels and its design method |
| CN214574178U (en) * | 2020-12-25 | 2021-11-02 | 广西祥明科技发展有限公司 | Foundation pile detects fixing device for engineering detection |
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2022
- 2022-04-24 CN CN202210451006.5A patent/CN114923717B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200290332Y1 (en) * | 2002-06-19 | 2002-09-26 | (주)삼원기술단 | Tunnel lining testing device |
| CN102809508A (en) * | 2012-07-20 | 2012-12-05 | 上海交通大学 | Load positioning device for structural test |
| CN107100273A (en) * | 2017-05-09 | 2017-08-29 | 福建国强新型环保建材有限公司 | A kind of assembled integrated house and its installation method |
| CN108195664A (en) * | 2017-12-26 | 2018-06-22 | 上海隧道工程有限公司 | Duct pieces of shield tunnel seam mechanical property multifunction test device |
| CN108344637A (en) * | 2018-01-08 | 2018-07-31 | 同济大学 | Shield duct piece mechanical simulation test device |
| CN109342151A (en) * | 2018-12-22 | 2019-02-15 | 福州大学 | Eliminate the horizontal tunnel model test device and test method of bottom friction |
| CN209387378U (en) * | 2018-12-22 | 2019-09-13 | 福州大学 | Eliminate the horizontal tunnel model test device of bottom friction |
| CN209363921U (en) * | 2018-12-29 | 2019-09-10 | 北京韩建河山管业股份有限公司 | In small-bore steel short tube assembly weld accessory cart |
| KR20210078754A (en) * | 2019-12-19 | 2021-06-29 | 한국과학기술원 | Segment type ring burst test apparatus for mechanical properties evaluation of composite pressure vessels and its design method |
| CN212391202U (en) * | 2020-03-09 | 2021-01-22 | 中铁十四局集团房桥有限公司 | Shield segment horizontal assembling test base and assembling test bed |
| CN214574178U (en) * | 2020-12-25 | 2021-11-02 | 广西祥明科技发展有限公司 | Foundation pile detects fixing device for engineering detection |
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| CN114923717A (en) | 2022-08-19 |
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