CN207751805U - A kind of large section tunnel arch experimental rig - Google Patents
A kind of large section tunnel arch experimental rig Download PDFInfo
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- CN207751805U CN207751805U CN201820050811.6U CN201820050811U CN207751805U CN 207751805 U CN207751805 U CN 207751805U CN 201820050811 U CN201820050811 U CN 201820050811U CN 207751805 U CN207751805 U CN 207751805U
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- arch
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- girder
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Abstract
A kind of large section tunnel arch experimental rig disclosed by the utility model, including loading frame, semi-girder, oil cylinder, foil gauge and control system；The loading frame is vertically spliced by multilayer truss structure, and section is regular polygon structure；The semi-girder is arranged in the inside of the regular polygon corner of loading frame, and the oil cylinder is fixed on the front end of semi-girder and by the flexible of control system control cylinder, and the external part of oil cylinder is in contact with the outer wall for being arranged in the experiment arch of the inside of loading frame；The foil gauge be attached to experiment arch outer wall on, oil cylinder with experiment arch contact point front, rear and top.Tunnel arch experimental rig provided by the utility model, its is reasonable for structure, to carrying out confined concrete arch entirety stress, deformation, unstability and destructive characteristics research, the action rule of its load and displacement, steel strain etc. is grasped, there is higher engineering research value.
Description
Technical field
The utility model is related to arch experimental technique field more particularly to a kind of large section tunnel arch experimental rigs.
Background technology
In recent years, with national economy fast development, the intercity backbone in developed regions, city expressway and national highway master
Dry traffic volume of highway rapid development, two-way four-lane, six-lane highway cannot meet the volume of traffic and increase requirement, it is desirable that two-way
Eight lane roads are adapted therewith, so correspondingly will appear two-way eight tracks vcehicular tunnel.Two-way eight tracks vcehicular tunnel is
Large section tunnel since the engineering practice sample size in this kind of tunnel is few, and can be constructed without specification with design, so right
The key technology of this kind of tunnel arch carries out research and feels more urgent and important.
For tunnel surrounding, on the one hand the especially large cross-section tunnel of complex geologic conditions bears complicated field stress
Effect, on the other hand excavate and cause stress concentration and stresses re-distribution, cause the destruction of a certain range country rock, formed and loosened
Circle.Crack rock or fragmentation rock mass, these rock mass structures after break wall rock mostly destruction restrict construction safety, are applying thus
Various support patterns and supporting construction are taken during work.If excavation method is unreasonable with supporting construction, can cause
Break wall rock tunnel generates large deformation, or even generates large volume landslide and prominent water burst.It is needed with the development and traffic of national economy
The increasingly increase asked, the construction of complex condition large cross-section tunnel will be more and more, but domestic for two-way 8 track tunnel at present
Construction Theory and experience all relative deficiencies under complex geological condition, and the country can instruct such super large disconnected without ready-made specification
The design and construction of face vcehicular tunnel, so the surrounding rock stability and support system research to this kind of tunnel are very necessary.
Utility model content
The purpose of this utility model is a kind of large section tunnel arch provided by the utility model in view of the above technical problems
Frame experimental rig, it is reasonable for structure, to carrying out confined concrete arch entirety stress, deformation, unstability and destructive characteristics research, grasp
The action rule of its load and displacement, steel strain etc., has higher engineering research value.
The technical solution of the utility model
In order to solve the above technical problems, a kind of large section tunnel arch experimental rig provided by the utility model, including
Loading frame, semi-girder, oil cylinder, foil gauge and control system；The loading frame is vertically spliced by multilayer truss structure,
Section is regular polygon structure；The semi-girder is arranged in the inside of the regular polygon corner of loading frame, and the oil cylinder is fixed on
The front end of semi-girder and by the flexible of control system control cylinder, and the external part of oil cylinder and be arranged in the inside of loading frame
The outer wall of experiment arch is in contact；The foil gauge is attached on the outer wall of experiment arch, the contact point of oil cylinder and experiment arch
Front, rear and top.
Further, the large section tunnel arch experimental rig includes 36 semi-girders and oil cylinder.
Further, the semi-girder is formed by straight section, end face and reinforcing rib welding, and the end face is arranged the two of straight section
The junction in straight section and end face is arranged in end, the reinforcing rib.It can stretching according to the size overhead different length of experiment arch
Arm, to meet test requirements document.
Further, the straight section is rectangular tube, and end face is welded on the both ends of rectangular tube, on the one hand end face is used for semi-girder
It fixes with oil cylinder, on the other hand semi-girder is fixed on loading frame.
Further, the control system includes servo control module and data acquisition module, the servo control module
It is connect with the oil cylinder, realizes hydraulic loaded whole process SERVO CONTROL；The data acquisition module and the foil gauge on experiment arch
Connection is used for the real-time acquisition of test data.
The utility model advantageous effect：
A kind of large section tunnel arch experimental rig provided by the utility model, it is reasonable for structure, it is mixed to carrying out constraint
Solidifying soil arch entirety stress, deformation, unstability and destructive characteristics research, the effect for grasping its load and displacement, steel strain etc. are advised
Rule has higher engineering research value.
Description of the drawings
By being described in detail made by conjunction with the following drawings, the above-mentioned advantage of the utility model will be apparent and more hold
Readily understood, these attached drawings are only schematical, are not intended to limit the utility model, wherein：
Fig. 1 is a kind of structural schematic diagram of large section tunnel arch experimental rig described in the utility model；
Fig. 2 is the structural schematic diagram of the semi-girder of the utility model；
Fig. 3 is the side view of Fig. 2.
In attached drawing, the component representated by each label is as follows：
1. loading frame；2. semi-girder；2-1. straight section；2-2. end face；2-3. reinforcing rib；3. oil cylinder；4. testing arch.
Specific implementation mode
With reference to specific embodiments and the drawings, a kind of large section tunnel arch experimental rig of the utility model is carried out
It is described in detail.
The embodiment recorded herein is the specific specific implementation mode of the utility model, for illustrating the utility model
Design, is explanatory and illustrative, should not be construed as the limit to the utility model embodiment and the scope of the utility model
System.In addition to the embodiment recorded herein, those skilled in the art can also be based on the application claims and specification institute is public
For the content opened using obvious other technical solutions, these technical solutions include doing using the embodiment to recording herein
Go out the technical solution of any obvious substitutions and modifications.
The attached drawing of this specification is schematic diagram, aids in illustrating the design of the utility model, it is schematically indicated each section
Shape and its correlation.It note that the structure of each component for the ease of clearly showing the utility model embodiment, phase
Same reference marker is for indicating identical part.
Fig. 1 to Fig. 3 is a kind of accompanying drawings of herein described large section tunnel arch experimental rig.
A kind of structural schematic diagram of large section tunnel arch experimental rig, as shown in Figure 1 comprising loading frame 1 is stretched
Arm 2, oil cylinder 3, foil gauge and control system；The loading frame 1 is vertically spliced by multilayer truss structure, and section is just
Polygonized structure；The semi-girder 2 is arranged in the inside of the regular polygon corner of loading frame 1, and the oil cylinder 3 is fixed on semi-girder 2
Front end and by the flexible of control system control cylinder 3, and the external part of oil cylinder 3 and be arranged in the inside of loading frame 1
The outer wall of experiment arch 4 is in contact；The foil gauge be attached to experiment arch 4 outer wall on, oil cylinder 3 with test arch 4 contact
Front, rear and the top of point.
In the application, the large section tunnel arch experimental rig includes 36 semi-girders 2 and oil cylinder 3.
Fig. 2 is the structural schematic diagram of the semi-girder of the utility model, and the semi-girder 2 is by straight section 2-1, end face 2-2 and reinforcing rib
2-3 weldings form, and the end face 2-2 is arranged at the both ends of straight section 2-1, and the reinforcing rib 2-3 is arranged in straight section 2-1 and end face 2-
2 junction；It can be according to the semi-girder of the size overhead different length of experiment arch, to meet test requirements document.
Fig. 3 is the side view of semi-girder, and the straight section 2-1 is rectangular tube, and end face 2-2 is welded on the both ends of rectangular tube.It uses
High-strength bolt is fixed semi-girder and oil cylinder by end face 2-2, and semi-girder is on the other hand fixed on loading frame by high-strength bolt
On.
The control system includes servo control module and data acquisition module, the servo control module and the oil cylinder
3 connections, realize hydraulic loaded whole process SERVO CONTROL；The data acquisition module is connect with the foil gauge on experiment arch, is used for
The real-time acquisition of test data.
It, can be with the various types of constraints of design studies using root large section tunnel arch experimental rig provided by the present application
Concrete arch and I-steel arch, under the load modes such as pressure, bias, by the load of arch, deformation, stress into
Whole stress rule, deformation instability form, local failure feature and the arch of each group arch are furtherd investigate in row system acquisition and analysis
Frame joints deformation behaviour.
Specific loading mode includes following several：
（1）Uniformly distributed load：Each oil cylinder load is identical.
（2）Bias loads：According to the difference of horizontal stress and vertical stress, if lateral pressure coefficient is 0.5, i.e., left and right is each
Oil cylinder load is 0.5 times that each oil cylinder in top is further applied load；Arch meet with stresses it is asymmetric, using central axis as boundary, if axis
Stress suffered by arch is 0.5 times of right side on the left of line, i.e., each oil cylinder in the left side is that each oil cylinder in right side is further applied load 0.5 times.
（3）Loading speed and dwell time：Using hierarchical loading, when load is less than the 90% of estimated ultimate load, 10kN/
Min, per 30kN pressurizes 0.5min；When load is more than the 90% of estimated ultimate load, 5kN/min, per 10kN pressurizes 0.5min；Partially
It is identical when pressure load.
（4）Stop load standard：It is loaded in such a way that dullness is pressurizeed, until test specimen destroys.In the process and the moment is observed
Test specimen destroys situation, until test specimen integrally enters yield situation or generates apparent destroy.
It is as follows to carry out the step of correlation test is studied using tunnel arch experimental rig described herein：
（1）Each component of testing stand is in place：By loading frame system in specific location assembly, suitable load operations are adjusted
Radius；The lower beam of the lateral beam of installation, and adjust lower bolt and so that each beam is all in the same horizontal plane, it is assembled for arch
Platform is provided.
（2）Test component assembles：Experiment arch is transported to designated position, is attached each section arch by node,
Space is moved in reserved good contracting or installation allows pressure device.
（3）Monitoring collection sensor is installed：Strain rosette is pasted as requested in designated position；Each monitoring sensor is passed through
Conducting wire is connected with corresponding monitoring collecting unit.
（4）Upper beam installation：Upper beam is bolted on design position so that arch can only in the horizontal plane into
Row movement and deformation.
（5）It preloads：After each section installation terminates, slowly risen by the full servo-hydraulic Loading Control System in 36 channels
Pressure so that each equal engaged test arch of oil cylinder, and apply the preload no more than estimated failing load 3%.
（6）Experiment load：It is loaded in such a way that dullness is pressurizeed, until test specimen destroys.According to loading scheme and requirement, if
Determine program control parameter, include mainly loading speed and dwell time, then carry out Loading Control by the way of program control,
And moment observation test specimen destroys situation, until experiment is completed.
The application is used for the arch mechanical property test of 3 ~ 15m of geometric dimension, by the load of arch, deformation, stress
Carry out system acquisition and analysis, further investigate the whole stress rule of each group arch, deformation instability form, local failure feature and
Arch joints deformation behaviour, to study different section shape, in the form of different cross section, the constraint coagulation of different connection types
The mechanical property of soil, I-steel arch.
Compared with prior art, a kind of large section tunnel arch experimental rig provided by the utility model, structure are closed
Reason grasps its load and displacement, steel to carrying out confined concrete arch entirety stress, deformation, unstability and destructive characteristics research
The action rule of strain etc. has higher engineering research value.
The utility model is not limited to the above embodiment, anyone can obtain other under the enlightenment of the utility model
Various forms of products, however, make any variation in its shape or structure, it is every with identical or similar to the present application
Technical solution, all fall within the scope of protection of the utility model.
Claims (5)
1. a kind of large section tunnel arch experimental rig, which is characterized in that including loading frame（1）, semi-girder（2）, oil cylinder
（3）, foil gauge and control system；The loading frame（1）It is vertically spliced by multilayer truss structure, section is just polygon
Shape structure；The semi-girder（2）It is arranged in loading frame（1）Regular polygon corner inside, the oil cylinder（3）It is fixed on semi-girder
（2）Front end and by control system control cylinder（3）Flexible, and oil cylinder（3）External part be arranged in loading frame（1）
Inside experiment arch（4）Outer wall be in contact；The foil gauge is attached to experiment arch（4）Outer wall on, oil cylinder（3）With examination
Test arch（4）Contact point front, rear and top.
2. large section tunnel arch experimental rig according to claim 1, which is characterized in that the large section tunnel arch
Frame experimental rig includes 36 semi-girders（2）And oil cylinder（3）.
3. large section tunnel arch experimental rig according to claim 1, which is characterized in that the semi-girder（2）By straight section
（2-1）, end face（2-2）And reinforcing rib（2-3）Welding forms, the end face（2-2）It is arranged in straight section（2-1）Both ends, it is described
Reinforcing rib（2-3）It is arranged in straight section（2-1）With end face（2-2）Junction.
4. large section tunnel arch experimental rig according to claim 3, which is characterized in that the straight section（2-1）For side
Shape pipe, end face（2-2）It is welded on the both ends of rectangular tube.
5. large section tunnel arch experimental rig according to claim 1, which is characterized in that the control system includes watching
Take control module and data acquisition module, the servo control module and the oil cylinder（3）Connection realizes that hydraulic loaded whole process is watched
Clothes control；The data acquisition module is connect with the foil gauge on experiment arch, is used for the real-time acquisition of test data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820050811.6U CN207751805U (en) | 2018-01-12 | 2018-01-12 | A kind of large section tunnel arch experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820050811.6U CN207751805U (en) | 2018-01-12 | 2018-01-12 | A kind of large section tunnel arch experimental rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207751805U true CN207751805U (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820050811.6U Expired - Fee Related CN207751805U (en) | 2018-01-12 | 2018-01-12 | A kind of large section tunnel arch experimental rig |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752204A (en) * | 2019-01-28 | 2019-05-14 | 成都理工大学 | One kind can contracting steel arch-shelf asymmetrical loading simulation experiment method and device |
| CN109975120A (en) * | 2019-04-18 | 2019-07-05 | 中国建筑材料科学研究总院有限公司 | Concrete restraint stress and deformational stress measuring device and measuring method |
| CN111610101A (en) * | 2020-04-28 | 2020-09-01 | 中铁工程服务有限公司 | Steel bow member compression experiment platform |
| CN116908017A (en) * | 2023-09-06 | 2023-10-20 | 中国矿业大学(北京) | Underground engineering arch structure dynamic and static coupling performance test and evaluation method |
-
2018
- 2018-01-12 CN CN201820050811.6U patent/CN207751805U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752204A (en) * | 2019-01-28 | 2019-05-14 | 成都理工大学 | One kind can contracting steel arch-shelf asymmetrical loading simulation experiment method and device |
| CN109975120A (en) * | 2019-04-18 | 2019-07-05 | 中国建筑材料科学研究总院有限公司 | Concrete restraint stress and deformational stress measuring device and measuring method |
| CN109975120B (en) * | 2019-04-18 | 2021-07-20 | 中国建筑材料科学研究总院有限公司 | Concrete constraint stress and deformation stress measuring device and measuring method |
| CN111610101A (en) * | 2020-04-28 | 2020-09-01 | 中铁工程服务有限公司 | Steel bow member compression experiment platform |
| CN111610101B (en) * | 2020-04-28 | 2023-10-24 | 中铁工程服务有限公司 | Steel arch compression experiment table |
| CN116908017A (en) * | 2023-09-06 | 2023-10-20 | 中国矿业大学(北京) | Underground engineering arch structure dynamic and static coupling performance test and evaluation method |
| CN116908017B (en) * | 2023-09-06 | 2023-11-28 | 中国矿业大学(北京) | Underground engineering arch structure dynamic and static coupling performance test and evaluation method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20200112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |