CN206038343U - Indoor test device of accurate simulation of tunnel bottom structure stress - Google Patents
Indoor test device of accurate simulation of tunnel bottom structure stress Download PDFInfo
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- CN206038343U CN206038343U CN201621046966.XU CN201621046966U CN206038343U CN 206038343 U CN206038343 U CN 206038343U CN 201621046966 U CN201621046966 U CN 201621046966U CN 206038343 U CN206038343 U CN 206038343U
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- axle power
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Abstract
The utility model discloses an indoor test device of accurate simulation of tunnel bottom structure stress, the device comprises model box, axle power subassembly, lateral restraint subassembly, the anti power subassembly in stratum. Various different forms's actual mechanics boundary condition be can apply according to the stress of tunnel bottom structure, axle center pressurized, eccentric pressurized, lateral restraint and pressure of surrounding rock etc. Are included to and the rich water of simulation tunnel bottom country rock, inhomogeneously soften, actual conditions such as come to nothing in the part. Link quiet power or dynamic loading system, can be convenient apply external load, simultaneously, can set up and adjust with making things convenient for each subassembly according to actual conditions and needs. When this test device has solved current test device and can't consider the inhomogeneous condition such as tunnel bottom appear to soften, cavity the bottom restraint apply a difficult problem, realized the accurate test simulation to tunnel bottom structure stress.
Description
Technical field
This utility model is related to tunnel structure laboratory test technical field, more particularly to a kind of tunnel bottom structure stress shape
State accurately simulates laboratory testing rig.
Background technology
With the development and the progress of Tunnel Engineering technology of China's economic, various Tunnel Engineering structures are increasing.By
Harsh in ground occurrence condition complexity, surrounding enviroment sensitivity, use condition residing for tunnel, structure is from multifactor long term
Lower performance is constantly deteriorated, and part tunnel occurs in that polycrystalline substance is damaged, the phenomenon such as rise soil, and has had a strong impact on the operation in tunnel
Safety.Tunnel bottom structural test is used as research tunnel bottom structure feature, property evolution rule and failure mode
A kind of Main Means, its importance are self-evident.
In recent years, for tunnel structure, Chinese scholars have developed a series of assay device.Such as Chinese utility model public affairs
Tunnel lining component high-temperature mechanical property testing system disclosed in the number of opening CN101131343A, is mainly used in simulation tunnel fire special
Point, thermal boundary feature and tunnel lining structure system loading characteristic, study the mechanical behavior under high temperature of tunnel lining structure system.In
The three-dimensional adjustable Geotechnical Engineering physical simulation multifunctional examination of model two dimension disclosed in state utility model publication number CN101042390A
Experiment device, there is provided a kind of also can to apply pressure to testing soil with testing soil mechanics from three-dimensional from two-dimensional directional
The assay device of performance.The Geotechnical Engineering Multi-functional analog assay device developed by Headquarters of the General Staff engineer research three, using the device
Plane geomechanical model test can be carried out to chamber, hole group, side slope and foundation ditch.But these assay devices are all whole from tunnel
Body structural point is studied to the stress in tunnel, it is impossible to which the mechanical characteristic and performance for obtaining tunnel bottom structure partial is drilled
Law, is not also directed to the dedicated experiments device of tunnel bottom structure at present both at home and abroad.
For component test, a kind of main test method is to adopt three-axis tester both at home and abroad at present.The test equipment
There is axial stress σ1Application system, the stress σ of two horizontal directions2And σ3Lateral stress application system, respectively by independence
Hydraulic system be controlled, it is possible to achieve three-dimensional anisobaric loading function.But the pilot system is in certain single direction
On can only realize uniform load, for tunnel bottom structure, when bottom occur country rock local softening or occur cavity when,
The bottom surface of tunnel bottom structure is obviously in a kind of non-homogeneous stress, and existing triaxial test system cannot simulation tunnel bottom
This actual stress of portion's structure.
On the whole, tunnel Integrated test facility existing both at home and abroad at present and component test device can not be good
The actual forced status of simulation tunnel polycrystalline substance, therefore, develop it is a kind of it is new can more accurate simulation tunnel bottom knot
The laboratory testing rig of structure stress has been urgent need.
Utility model content
Tunnel can not be simulated well in order to solve tunnel Integrated test facility existing at present and component test device
The technical problem of the actual forced status of road polycrystalline substance, this utility model provide one kind and accurately simulation tunnel polycrystalline substance can receive
The tunnel bottom structural stress state of force boundary accurately simulates laboratory testing rig.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is, a kind of tunnel bottom structural stress state
Accurate simulation laboratory testing rig, including model casing, axle power component, sidewise restraint component and stratum drag component, test examination
Part is arranged in model casing body, and described axle power component is disposed with left-right symmetry in the axial both sides of test test specimen and to test examination
Part applies axial force, is symmetrically arranged at the lateral sides of test test specimen and applies side to testing test specimen before and after sidewise restraint component
Xiang Li, stratum drag component include being arranged at the packing material of test test specimen bottom and are arranged in packing material top both sides
Jack assembly.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, and described axle power component includes
Two identical axle power sub-components, two described axle power sub-components are respectively arranged at the two ends of test test specimen axial direction, axle power
Component includes an axle power jacking bolt, an axle power spring and two blocks of axle power steel plates, and two blocks of axle power steel plates are separately fixed at bullet
Spring both sides, axle power jacking bolt are threaded onto on the reserved axle power bolt hole of model casing and withstand one of axle power steel plate, another piece
Axle power steel plate withstands the end of test test specimen.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, described sidewise restraint component
Including four identical sidewise restraint sub-components, four described sidewise restraint sub-components are symmetrical with the axis for testing test specimen
Axle, symmetrical two-by-two to be arranged at the lateral both sides of test test specimen, each sub-component includes a lateral jacking bolt and a side
To steel plate, lateral jacking bolt withstands lateral steel plate by the bolt hole that model casing is reserved and acts on test test specimen.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, described jack assembly bag
Include two jack sub-components and a cover plate, each jack sub-component include two counter-force bars, reaction beam, one thousand
Jin top and a support, two described counter-force bars are symmetrically fixed on the both sides of model casing, and the two ends of reaction beam are fixed respectively
On two counter-force bars, the upper end of jack is withstood in the middle part of reaction beam, and lower end is placed on support, props up and is placed on cover plate, cover plate
It is covered on packing material and transmits the force to fill material.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, described model casing it is outer
Wall and top are respectively equipped with stiffening rib, and the stiffening rib of described outer wall outwards extends setting perpendicular to outer wall surface, described top
Portion's stiffening rib outwards extends setting parallel to model tank floor.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, and described bolt hole is strip
Shape bolt hole.
A kind of described tunnel bottom structural stress state accurately simulates laboratory testing rig, and described packing material is mould
Intend country rock material or be locally filled with softening the simulation country rock material of material.
It is of the present utility model to have technical effect that：
(1) by arranging " bar shaped " hole position in model casing, can easily adjust test specimen and act on described axle power component
The relative position of point, controls the eccentric size of test specimen axial compression, embodies the loading characteristic of tunnel structure eccentric compression, solves
Existing tunnel structure test device is difficult to apply a difficult problem for axially eccentric load.
(2) existing structural testing setup can only apply uneven confined pressure in different directions, and in certain single direction
On can only apply Even round pressure；The assay device that this utility model is set up can also apply uneven enclosing in test specimen bottom direction
Pressure such that it is able to mechanical characteristic of the more accurate simulation tunnel bottom under different contact conditions, particularly solves existing
Assay device can not be to Tunnel Base rich water, the problem that inhomogeneities soften and the condition of coming to nothing is tested.
In sum, this utility model provides a kind of examination that can apply various tunnel bottom structural mechanics boundary conditions
Experiment device, and according to practical situation and can need each component is conveniently set up and adjusted so that spend less
Economic cost can study the Laws of Mechanics of most tunnel bottom structures.
Below in conjunction with the accompanying drawings embodiment of the present utility model is further described.
Description of the drawings
Fig. 1 is this utility model assay device axonometric chart；
Fig. 2 is this utility model assay device front view；
Fig. 3 is this utility model assay device side view；
Fig. 4 is this utility model assay device top view；
Fig. 5 is to arrange Fig. 1 inside this utility model assay device；
Fig. 6 is to arrange Fig. 2 inside this utility model assay device；
Fig. 7 is this utility model assay device exploded view；
Wherein：1 is reaction beam；2 is jack；3 is counter-force bar；4 is support；5 is axle power jacking bolt；6 is axle power bullet
Spring；7 is axle power steel plate；8 is lateral jacking bolt, 9 is model casing, 10 is strip bolt hole, 11 is steel deck-plate, 12 is to fill out
Fill country rock material, 13 be test specimen, 14 be sensor, 15 be external load.
Specific embodiment
This utility model is made up of model casing, axle power component, sidewise restraint component, stratum drag component.Axle power component
It is disposed with left-right symmetry in the axial both sides of test test specimen；The lateral of test test specimen is symmetrically arranged at before and after sidewise restraint component
Both sides；By the adjustment of axle power and sidewise restraint component position of action point, can imitation specimen axial compression, eccentric compression, lateral
The different stresses such as constraint.Stratum drag component by test specimen bottom packing material and be arranged in packing material top both sides
Jack assembly composition；Different buried depth pressure from surrounding rock can be simulated by the applying of jack different pressures；By at test specimen bottom
Different materials are filled in portion, the practical situation such as can be come to nothing with simulation tunnel bottom country rock rich water, softening or local.It is outer by loading
Portion's static(al) or power loading system, are pressed downwards, can conveniently apply external load, tunnel bottom structure are carried out quiet dynamic
Force characteristic is tested.
Model cabinet wall is smooth；Outer wall is put more energy into process, it is ensured that casing intensity, in the reserved axle power bolt of design attitude and
Sidewise restraint bolt " bar shaped " hole position, in order to constrain the adjustment of bolt position, so that realize applying applying for eccentric compression load
Plus；Base plate and top stiffening rib are uniformly distributed in surrounding extension, reserve harness cord screw rod hole position.
Axle power component includes two sub-components, and each sub-component is by a jacking bolt, an axle power spring and two pieces little
Steel plate is constituted.Two blocks of little steel plates are separately fixed at spring both sides, and jacking bolt is withstood wherein by the bolt hole that model casing is reserved
Side, opposite side are withstood test specimen and are pressed.In test, the decrement for having demarcated spring by adjustment controls the size of axle power
And the relative position of adjustment test specimen and axle power component application point controls the eccentric size of test specimen axial compression.Two sub-components pair
It is arranged in the axial both sides of test specimen with claiming.
Sidewise restraint component includes four sub-components, and each sub-component is made up of a jacking bolt and a little steel plate,
Jacking bolt is withstood little steel plate and is acted on by the bolt hole that model casing is reserved and carry out on test specimen sidewise restraint.Each component is symmetrically
It is arranged in the lateral sides of test specimen.
Stratum drag component includes jack assembly and country rock material simulation component, and jack assembly includes two subgroups
Part, each sub-component is made up of two counter-force bars, reaction beam, digital display jack, a support is constituted.Digital display is very heavy
Top is withstood in the middle part of reaction beam above, is placed on support below, props up and is placed on cover plate, transmits the force to country rock material, Jin Erzuo
On test specimen underfill, simple area conversion is carried out by the numerical value that digital display jack shows and can control country rock
The size of pressure.
Country rock material carries out laboratory preparation or direct infilling work country rock material according to the rock property of Practical Project,
In country rock material, embedding soil pressure cell can also precisely control the numerical values recited of pressure from surrounding rock.By in test specimen bottom office
Portion's filling softens material (such as foam etc.), and country rock local in simulation tunnel bottom is come to nothing, softened or the actual loading feelings such as inhomogeneities
Condition；By add water can simulation tunnel bottom rich water state；In country rock material, embedding resistance-strain type ventage piezometer may be used also
To obtain the Super-void Water Pressure under additional dynamic loading.
Stratum drag component and axle power component are needed to be determined by specification or numerical computation method before the test, are wherein counted
Aobvious jack and axle power spring need to be selected according to practical situation and demarcated.The specific implementing procedure of assay device is：
(1) test specimen 13 made according to practical situation before the test and install mechanics sensor (strain gauge, accelerometer,
Piezoelectric transducer etc.), it is positioned over correct position and remains to use.
(2) country rock material 12 is actually prepared in the lab according to engineering or the direct infilling work soil body, in filling
In casing, soil pressure cell can be buried to precisely control pressure from surrounding rock；Local is changed and fills out the materials such as foam with simulation tunnel
Substrate is come to nothing, is softened and inhomogeneities；The ventage piezometer of embedded resistance-strain type is studying under the effect of quiet, power external load
Excess pore water pressure.Country rock material 12 is determined, after burying good sensor, it is placed in into model casing 9, steel deck-plate 11 is covered
(see Fig. 7).
(3) referring to accompanying drawing 1,5,6 and 7, test specimen 13 is installed in the hole position of steel deck-plate 11, is placed on loading equipemtn, with
Axle power component is first installed afterwards, is then placed jack stand 4, digital display jack 2 is positioned on support, finally install laterally about
Tread assembly.Each component install it is in place after start to apply mechanical boundary (pressure from surrounding rock manually boosting-rod on digital display jack 2
Slowly apply to design value；Axle power is eccentric by " bar to decrement, axle power is designed by the axle power spring 6 that compression has been demarcated
Shape hole 10 " is adjusted test specimen and is set with the relative position of axle power component application point), simulate as similar as possible with tunnel structure
Mechanical environment, implementation process is shown in Fig. 7.
(4) device can be placed in static loading system (such as universal testing machine etc.) according to the difference of subject study content to grind
Study carefully the static(al) mechanical property Evolution of tunnel structure；Device is placed in into power loading system (such as MTS hydraulic servo loading systems
Deng) research tunnel structure power mechanical property Evolution；And can be corresponding by the setting of mechanical boundary and adjustment, research
The affecting laws of influence factor and sensitivity.
This utility model is not limited by above-mentioned embodiment, other any real without departing from spirit of the present utility model
The modification made under matter and principle, modification, replacement, combination, simplify, should be equivalent substitute mode, be included in this practicality newly
In the legal protection category of type.
Claims (7)
1. a kind of tunnel bottom structural stress state accurately simulates laboratory testing rig, it is characterised in that including model casing, axle
Power component, sidewise restraint component and stratum drag component, test test specimen are arranged in model casing body, described axle power component or so
It is symmetrically arranged at the axial both sides of test test specimen and applies axial force to testing test specimen, symmetrically cloth before and after sidewise restraint component
Put the lateral sides in test test specimen and apply side force to testing test specimen, stratum drag component includes being arranged at test test specimen bottom
The packing material in portion and it is arranged in the jack assembly of packing material top both sides.
2. a kind of tunnel bottom structural stress state according to claim 1 accurately simulates laboratory testing rig, its feature
It is that described axle power component includes two identical axle power sub-components, two described axle power sub-components are respectively arranged at examination
The two ends of test specimen axial direction are tested, axle power sub-component includes an axle power jacking bolt, an axle power spring and two blocks of axle power steel plates, two
Block axle power steel plate is separately fixed at spring both sides, and axle power jacking bolt is threaded onto on the reserved axle power bolt hole of model casing and withstands which
In one block of axle power steel plate, another block of axle power steel plate withstand the end of test test specimen.
3. a kind of tunnel bottom structural stress state according to claim 1 accurately simulates laboratory testing rig, its feature
It is that described sidewise restraint component includes four identical sidewise restraint sub-components, four described sidewise restraint sub-components
To test the axis of test specimen as axis of symmetry, symmetrical two-by-two to be arranged at the lateral both sides of test test specimen, each sub-component includes one
Individual lateral jacking bolt and a lateral steel plate, lateral jacking bolt withstand lateral steel plate by the bolt hole that model casing is reserved and make
On test test specimen.
4. a kind of tunnel bottom structural stress state according to claim 1 accurately simulates laboratory testing rig, its feature
It is that described jack assembly includes two jack sub-components and a cover plate, each jack sub-component includes two
Counter-force bar, reaction beam, a jack and a support, two described counter-force bars are symmetrically fixed on the two of model casing
Side, the two ends of reaction beam are individually fixed on two counter-force bars, and the upper end of jack is withstood in the middle part of reaction beam, and lower end is placed in support
On, propping up and be placed on cover plate, cover plate is covered on packing material and transmits the force to fill material.
5. a kind of tunnel bottom structural stress state according to claim 1 accurately simulates laboratory testing rig, its feature
It is that the outer wall of described model casing and top are respectively equipped with stiffening rib, the stiffening rib of described outer wall is perpendicular to outer wall table
Face out extension to arrange, described top stiffening rib outwards extends setting parallel to model tank floor.
6. a kind of tunnel bottom structural stress state according to Claims 2 or 3 accurately simulates laboratory testing rig, and which is special
Levy and be, described bolt hole is strip bolt hole.
7. a kind of tunnel bottom structural stress state according to claim 1 accurately simulates laboratory testing rig, its feature
It is that described packing material is to simulate country rock material or be locally filled with softening the simulation country rock material of material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621031321 | 2016-08-31 | ||
| CN2016210313219 | 2016-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206038343U true CN206038343U (en) | 2017-03-22 |
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ID=58299793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621046966.XU Expired - Fee Related CN206038343U (en) | 2016-08-31 | 2016-09-09 | Indoor test device of accurate simulation of tunnel bottom structure stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206038343U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN108333100A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | A kind of experimental rig and method of simulation soil corrosion |
| CN109506863A (en) * | 2018-12-04 | 2019-03-22 | 济南三越测试仪器有限公司 | Self-reaction force crossbeam adjust automatically load test system |
-
2016
- 2016-09-09 CN CN201621046966.XU patent/CN206038343U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN106338409B (en) * | 2016-08-31 | 2018-07-24 | 中南大学 | A kind of tunnel bottom structural stress state accurately simulates laboratory testing rig |
| CN108333100A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | A kind of experimental rig and method of simulation soil corrosion |
| CN109506863A (en) * | 2018-12-04 | 2019-03-22 | 济南三越测试仪器有限公司 | Self-reaction force crossbeam adjust automatically load test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20180909 |
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| CF01 | Termination of patent right due to non-payment of annual fee |