CN205280502U - Surrouding rock deformation and pressure analogue test system - Google Patents
Surrouding rock deformation and pressure analogue test system Download PDFInfo
- Publication number
- CN205280502U CN205280502U CN201620050256.8U CN201620050256U CN205280502U CN 205280502 U CN205280502 U CN 205280502U CN 201620050256 U CN201620050256 U CN 201620050256U CN 205280502 U CN205280502 U CN 205280502U
- Authority
- CN
- China
- Prior art keywords
- subjects
- power transmission
- loading device
- base plate
- distortion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a surrouding rock deformation and pressure analogue test system belongs to the experimental field of geotechnical engineering, and its structure includes bearing test object and testing system's bottom plate, installs to be located the inboard one -way loading device of experimental object on the bottom plate, and one -way loading device one end articulates on the bottom plate, and the one -way loading device other end articulates has force transfer device, and one -way loading device applys the power by peripheral centering through force transfer device to experimental object. The utility model discloses can realize the accurate simulation to surrouding rock deformation and pressure for develop the supporting construction's of variant shape and size mechanical test, do not need outlying counter -force structure, the manufacturing of being convenient for, reduce cost, save space, but the assurance test load remains throughout to the radial load, and does benefit to loading device's life -span.
Description
Technical field
The utility model relates to geotechnical engineering test field, specifically a kind of country rock distortion and pressure simulation pilot system.
Background technology
Along with the development of China's economic society, underground mine, tunnel, subway, water power chamber etc. are built more and more, and more engineering is in severe geologic condition, and the support issues thereupon faced is also more and more outstanding. In this context, more and more support forms is used in scene, such as joist steel bow member, U-shaped steel arch-shelf, concrete filled steel tube bow member, grid steel frame, concrete Arch walling support etc. The mechanical property of above-mentioned supporting construction has remarkably influenced for the safety that is final stable and engineering of on-the-spot country rock. The important research means of supporting construction mechanical property are grasped, it is possible to clear and definite supporting construction mechanical characteristic, disclose its failure mechanism, optimize its design variable when carrying out mechanical test, engineering safety is significant.
But, still do not have a kind of scientific and reasonable pilot system can simulate tunnel, the distortion of tunnel surrounding and pressure really and accurately at present. Existing pilot system generally adopts conventional hydraulic ram, because of subjects structure reason in loading procedure, part load oil cylinder can when keep force value passive retraction, this and on-site actual situations are not obviously inconsistent because scene country rock distortion be unidirectional, irreversible. In addition, loading oil cylinder is generally placed in bow member periphery by currently similar pilot system, it is necessary to bulky peripheral counterforce structure, occupy a large amount of lab space, and laid down cost height, effort of taking a lot of work, does not meet the principle of " high precision, high-level efficiency, low cost "; When bow member being pressurizeed by the oil cylinder of periphery simultaneously, owing to bow member produces deformation, differ between oil cylinder axis with bow member axis and keep original vertical state surely, not only the tolerance range of test can be affected, also hydraulic ram can be caused certain infringement, shorten its work-ing life.
Practical novel content
For the problems referred to above, the purpose of this utility model is to provide a kind of country rock distortion and pressure simulation pilot system, and this pilot system can the distortion behavior of accurate simulation country rock, and reduce and take space, reduce manufacturing cost, it is to increase test accuracy, extend the work-ing life of pilot system.
The technical scheme in the invention for solving the technical problem is: country rock distortion and pressure simulation pilot system, comprise the base plate of bearing test object and pilot system, base plate is provided with the unidirectional deceleration loading device being positioned at inside subjects, unidirectional deceleration loading device one end is hinged on base plate, the unidirectional deceleration loading device the other end is hinged with power transmission device, and subjects is applied by periphery to the power at center by unidirectional deceleration loading device by power transmission device.
Distortion beyond plane occurs during in order to prevent subjects from loading, and further technical scheme is: being also provided with limiting block beam on base plate, limiting block beam is uniformly distributed along subjects; Limiting block beam is made up of the upper beam arranged up and down and be parallel to each other and lower block beam, and upper beam is passed through with lower block beam together with gear beam-to-column joint, there is the gap holding subjects between upper beam and lower block beam. Upper beam and lower block beam are fixed on base plate certain altitude place by gear beam post, and upper beam all contacts with edge's formation of subjects with lower block beam.
Further technical scheme is: being fixedly installed the bearing that promising subjects provides counter-force on base plate, described bearing is L-shaped, and bearing is positioned at the two ends of subjects and contacts with the end of subjects.
Further technical scheme is: described unidirectional deceleration loading device is hinged on counter-force post away from one end of subjects, and counter-force post is the cylindrical-shaped structure being fixedly connected on base plate, and the axis of counter-force post is vertical with base plate.
For avoiding unidirectional deceleration loading device that deflection occurs under gravity, unidirectional deceleration loading device is made to remain on the move in plane set, further technical scheme is: be provided with bracing or strutting arrangement between described unidirectional deceleration loading device and base plate, bracing or strutting arrangement comprises support bar and roller, the top of support bar is fixedly connected with unidirectional deceleration loading device, roller is installed in the bottom of support bar, and roller contacts with base plate. Bracing or strutting arrangement can arrange two, is separately positioned on one end that the middle part of unidirectional deceleration loading device is connected with power transmission device with unidirectional deceleration loading device.
Further technical scheme is: described power transmission device is uniformly distributed along subjects, power transmission device is frame-shaped structure, power transmission device is nested with the outside of the cross section in subjects, the side that power transmission device contacts with subjects is provided with power transmission decollator, and power transmission device and power transmission decollator are articulated and connected. Power can be acted on the contact surface of itself and subjects by power transmission decollator uniformly, accurate simulation force-bearing of surrounding rock mass situation.
Described unidirectional deceleration loading device can adopt non-return oil cylinder or the one-way cylinder etc. can only the device of unidirectional loading; it is hinged between unidirectional deceleration loading device and counter-force post and power transmission device; also it is hinged between power transmission device and power transmission decollator; axial force can be only subject to by bonding to deceleration loading device itself; side direction load is not born because of the distortion of subjects; make the load applied be radial load on the one hand, protect unidirectional deceleration loading device not damaged on the other hand.
Further technical scheme is: the surface that described power transmission decollator contacts with subjects is provided with rubber bearing. Rubber bearing can effectively reduce in loading procedure stress concentration degree subjects produced, more the real conditions of the on-the-spot shoulder bed effects of real simulation.
The beneficial effects of the utility model are:
1, the accurate simulation to country rock distortion and pressure can be realized. Existing pilot system generally adopts conventional hydraulic ram, because of subjects structure reason in loading procedure, part load oil cylinder can when keeping force value passive retraction; This and on-site actual situations are not obviously inconsistent, because the distortion of on-the-spot country rock is unidirectional, irreversible. This pilot system and test method adopt unidirectional deceleration loading device, in process of the test, unidirectional deceleration loading device only with shrink or stop and can not be overhanging, even if the pulling force that unidirectional deceleration loading device is subject to is greater than the negative pressure of its internal hydraulic pressure oil, also can not be overhanging; The above-mentioned characteristic of unidirectional deceleration loading device achieves the more accurate simulation to deformation characteristics of rocks;
2, unidirectional deceleration loading device is installed in the inner side of subjects, it is not necessary to peripheral counterforce structure, is convenient to manufacture, reduces costs, saves space;
3, realizing loading by the contraction of unidirectional deceleration loading device, each junction is hinged, can remain radial load by warranty test load, can improve test accuracy; Compared with being arranged on deceleration loading device subjects is outside, it being carried out loading, the utility model differs between deceleration loading device axis with subjects axis after can preventing subjects deformation and keeps original vertical state surely, and deceleration loading device is caused infringement, shorten its work-ing life;
4, can be used for carrying out the mechanical test of the support forms such as U-shaped steel arch-shelf, joist steel bow member, concrete filled steel tube bow member, grid steel frame and concrete arch body, applied widely;
5, the position of counter-force post and the length of unidirectional deceleration loading device is regulated, the bow member mechanical test of different shapes and size can be realized, with the different shapes bow member adapted under tunnel, mine, tunnel, Hydro tunnels, the different operating mode of subway, such as circle, stalk Semicircular arched, semicircle anti-end arch, the shape of a hoof.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the B-B view of Fig. 1.
In figure: 1-subjects, 2-counter-force post, 3-non-return oil cylinder, 4-tail cuts with scissors, and 5-end cuts with scissors, and 6-component cuts with scissors, 7-power transmission decollator, 8-power transmission device, 9-limiting block beam, and 10-keeps off beam post, 11-bearing, 12-midfoot support, and 13-end supports, 14-base plate, 15-rubber bearing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the utility model will be further described:
As shown in Figure 1, country rock distortion and pressure simulation pilot system, comprise the base plate 14 of bearing test object 1 and pilot system, and subjects 1 is the bow member of " U " shape, and pilot system forms primarily of counter-force post 2, non-return oil cylinder 3, power transmission system, auxiliary part etc. Wherein:
Described counter-force post 2 is generally processed by steel, and counter-force post 2 is cylindrical-shaped structure, is fixed on base plate 14, the axis of counter-force post 2 is vertical with base plate 14, its position is corresponding with the tail hinge 4 design position of non-return oil cylinder 3, for the tail hinge 4 of fixing non-return oil cylinder 3, for this pilot system provides counter-force. By changing the position of counter-force post 2, and regulate the length of non-return oil cylinder 3, it is possible to the effectively operating radius of Adjustment Tests system, adapts to the subjects 1 of different shapes and size.
Described non-return oil cylinder 3 realizes the loading effect to subjects 1 by shrinking; In process of the test, non-return oil cylinder 3 only with shrink or stop and can not be overhanging, even if the pulling force that non-return oil cylinder 3 is subject to is greater than the negative pressure of its internal hydraulic pressure oil, also can not be overhanging; Such that it is able to realize the more accurate simulation to country rock distortion.
Described power transmission system is cut with scissors 4 by tail, is held hinge 5, component hinge 6, power transmission device 8 and power transmission decollator 7 to form.
As shown in Figure 2, described tail hinge 4 is arranged on the rear end of non-return oil cylinder 3, for connecting non-return oil cylinder 3 and counter-force post 2; Described end hinge 5 is arranged on the front end of non-return oil cylinder 3, for connecting power transmission device 8; Described power transmission device 8 cuts with scissors 6 by component again and is connected with power transmission decollator 7, and power transmission decollator 7 acts in described subjects 1. The hinge structure of power transmission system can ensure that non-return oil cylinder 3 itself is only by axial force, does not bear side direction load because of the distortion of subjects 1, makes the load applied be radial load on the one hand, and protection non-return oil cylinder 3 is not damaged on the other hand.
Described power transmission device 8 is uniformly distributed along subjects 1, power transmission device 8 is frame-shaped structure, power transmission device 8 is nested with the outside of the cross section in subjects 1, the side that power transmission device 8 contacts with subjects is provided with power transmission decollator 7, the surface of described power transmission decollator 7 is provided with rubber bearing 15, can effectively reduce in loading procedure stress concentration degree subjects 1 produced, more the real conditions of the on-the-spot shoulder bed effects of real simulation.
Described auxiliary part supports 13 by limiting block beam 9, bearing 11, midfoot support 12 and end and forms.
As shown in Figure 3, upper and lower beam is fixed on base plate 14 certain altitude place by beam post 10 by described limiting block beam 9, during for preventing described subjects 1 from loading, out-of-plane distortion occurs. Limiting block beam 9 is uniformly distributed along subjects 1; Limiting block beam 9 is made up of the upper beam arranged up and down and be parallel to each other and lower block beam, there is the gap holding subjects 1 between upper beam and lower block beam, and upper beam is all formed with the edge of subjects 1 with lower block beam and contacts.
Described bearing 11 is fixed on base plate 14, for providing counter-force to subjects 1. Bearing 11 is L-shaped, and bearing 11 is positioned at the two ends of subjects 1 and the end with subjects 1 and contacts.
Described midfoot support 12 and end support middle part and the front end that 13 are separately positioned on non-return oil cylinder 3, for supporting non-return oil cylinder 3, make hydraulic ram 3 remain on the horizontal in-plane moving set. Midfoot support 12 and end support 13 and form by support bar and roller, and the top of support bar is fixedly connected with non-return oil cylinder 3, and roller is installed in the bottom of support bar, and roller contacts with base plate 14.
The test method of the present embodiment, comprises the following steps:
Step (1): lower block beam is arranged on gear beam post 10, forms service platform;
Step (2): subjects 1 is assembled on described service platform, and subjects 1 is placed in specified location;
Step (3): each non-return oil cylinder 3 is cut with scissors 4 by tail and is fixed on the counter-force post 2 specified, and regulate the length of non-return oil cylinder 3, the operating radius of Adjustment Tests system, the shape of adequacy test object 1 and size;
Step (4): adopt end hinge 5 connection non-return oil cylinder 3 and connect power transmission device 8, cut with scissors 6 by component and power transmission device 8 is connected with power transmission decollator 7;
Step (5): upper beam is arranged on beam post 10, subjects 1 is limited in plane so that it is movement and distortion in plane can only be produced;
Step (6): placement sensor in pilot system, and sensor is connected to corresponding Monitoring systems;
Described sensor mainly comprises force transducer, displacement sensor, strain transducer etc., force transducer is arranged in one end that unidirectional deceleration loading device is connected with power transmission device, displacement sensor one end is connected on the base plate of testing table, the other end is connected in subjects, strain transducer adopts foil gauge, foil gauge is attached in subjects as required, force transducer should be connected with data collecting system with displacement sensor, foil gauge should be connected with strain gage by wire, data collecting system and strain gage composition Monitoring systems.
Step (7): open Monitoring systems, carries out preload: by Loading Control System, non-return oil cylinder 3 length is shortened, and makes power transmission decollator 7 closely connected with the outside of subjects 1, and applies to be not more than the load estimating failing load 3%;
Step (8): load and the displacement being controlled non-return oil cylinder 3 by Loading Control System, load to subjects 1, test starts: the country rock distortion that can simulate as required and the practical situation of pressure, by Loading Control System, whole oil cylinder is set to synchronous action, or asynchronous action; Test can adopt the mode of dull pressurization, and load is less than 0.9QmaxTime (QmaxFor estimating ultimate load), loading rate 0.02Qmax/ min, every 0.1QmaxPressurize 1min; Load is greater than 0.9QmaxTime, loading rate 0.005Qmax/ min, every 0.05QmaxPressurize 1min;
Step (9): the distortion of real-time monitored, acquisition test object in process of the test, by power, strained situation;
Step (10): phenomenons such as breaking occurs in subjects 1, unstability, gross distortion and when cannot continue carrying, stops loading, closes Monitoring systems, and test terminates;
Step (11): result analysis: the deformation failure situation of the monitoring result such as the load that collects according to Monitoring systems, displacement, strain and subjects, obtains mechanical characteristic and the deformation failure mechanism such as the bearing capacity of subjects, integral rigidity.
Subjects 1 of the present utility model can be U-shaped steel arch-shelf, also can for other cross section bow member, such as concrete filled steel tube, U-shaped steel, joist steel, grid steel frame etc., need its global shape can be circular, oval and straight leg semicircle etc. according to testing, can accurate simulation tunnel, tunnel, subway, water power chamber country rock distortion behavior, thus effectively the support forms such as supporting bow member are carried out mechanical test, study its mechanical characteristic, optimize mechanics parameter.
The unidirectional deceleration loading device that the utility model adopts is not limited to the non-return oil cylinder described in embodiment, it is also possible to adopt other unidirectional deceleration loading devices such as one-way cylinder or unidirectional electrical cylinder.
The foregoing is only better embodiment of the present utility model; it it is not whole embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle; any amendment of being done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Except technology feature described in specification sheets, all the other technology features are the technology of it is known to those with ordinary skill in the art that, in order to outstanding innovative characteristics of the present utility model, above-mentioned technology feature does not repeat them here.
Claims (7)
1. country rock distortion and pressure simulation pilot system, it is characterized in that, comprise the base plate of bearing test object and pilot system, base plate is provided with the unidirectional deceleration loading device being positioned at inside subjects, unidirectional deceleration loading device one end is hinged on base plate, the unidirectional deceleration loading device the other end is hinged with power transmission device, and subjects is applied by periphery to the power at center by unidirectional deceleration loading device by power transmission device.
2. country rock according to claim 1 distortion and pressure simulation pilot system, is characterized in that, being also provided with limiting block beam on base plate, limiting block beam is uniformly distributed along subjects; Limiting block beam is made up of the upper beam arranged up and down and be parallel to each other and lower block beam, and upper beam is passed through with lower block beam together with gear beam-to-column joint, there is the gap holding subjects between upper beam and lower block beam.
3. country rock according to claim 1 distortion and pressure simulation pilot system, is characterized in that, is fixedly installed the bearing that promising subjects provides counter-force on base plate, and described bearing is L-shaped.
4. country rock according to claim 1 distortion and pressure simulation pilot system, it is characterized in that, described unidirectional deceleration loading device is hinged on counter-force post away from one end of subjects, and counter-force post is the cylindrical-shaped structure being fixedly connected on base plate, and the axis of counter-force post is vertical with base plate.
5. country rock according to claim 1 distortion and pressure simulation pilot system, it is characterized in that, it is provided with bracing or strutting arrangement between described unidirectional deceleration loading device and base plate, bracing or strutting arrangement comprises support bar and roller, the top of support bar is fixedly connected with unidirectional deceleration loading device, roller is installed in the bottom of support bar, and roller contacts with base plate.
6. country rock according to claim 1 distortion and pressure simulation pilot system, it is characterized in that, described power transmission device is uniformly distributed along subjects, power transmission device is frame-shaped structure, power transmission device is nested with the outside of the cross section in subjects, the side that power transmission device contacts with subjects is provided with power transmission decollator, and power transmission device and power transmission decollator are articulated and connected.
7. country rock according to claim 6 distortion and pressure simulation pilot system, is characterized in that, the surface that described power transmission decollator contacts with subjects is provided with rubber bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620050256.8U CN205280502U (en) | 2016-01-19 | 2016-01-19 | Surrouding rock deformation and pressure analogue test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620050256.8U CN205280502U (en) | 2016-01-19 | 2016-01-19 | Surrouding rock deformation and pressure analogue test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205280502U true CN205280502U (en) | 2016-06-01 |
Family
ID=56065068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620050256.8U Expired - Fee Related CN205280502U (en) | 2016-01-19 | 2016-01-19 | Surrouding rock deformation and pressure analogue test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205280502U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486586A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Surrounding rock deformation and pressure simulation test system and method |
| CN108120632A (en) * | 2017-11-24 | 2018-06-05 | 北方工业大学 | Experimental device for simulation ground body warp law |
| CN110132718A (en) * | 2019-04-19 | 2019-08-16 | 同济大学 | Structure residual bearing capacity measuring method and system based on Tunnel Lining Deformation feature |
-
2016
- 2016-01-19 CN CN201620050256.8U patent/CN205280502U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486586A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Surrounding rock deformation and pressure simulation test system and method |
| CN108120632A (en) * | 2017-11-24 | 2018-06-05 | 北方工业大学 | Experimental device for simulation ground body warp law |
| CN110132718A (en) * | 2019-04-19 | 2019-08-16 | 同济大学 | Structure residual bearing capacity measuring method and system based on Tunnel Lining Deformation feature |
| CN110132718B (en) * | 2019-04-19 | 2021-11-09 | 同济大学 | Method and system for measuring residual bearing capacity of structure based on tunnel lining deformation characteristics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105486586A (en) | Surrounding rock deformation and pressure simulation test system and method | |
| CN205280502U (en) | Surrouding rock deformation and pressure analogue test system | |
| CN103901180B (en) | A kind of method indirectly obtaining underground passage force-bearing of surrounding rock mass and deformation state | |
| CN204679269U (en) | A kind of pseudo static testing device | |
| CN203551406U (en) | Soil-rock mass in-situ direct shear test device with automatic data acquisition system | |
| CN104502201A (en) | Geomechanical model test device for testing rock slope stability | |
| CN102269676A (en) | High-precision geotechnical simple shear apparatus and use method thereof | |
| CN104975621A (en) | Multi-anchoring end retaining wall indoor model testing apparatus and testing method | |
| CN106759547B (en) | Integral Abutment, pile foundation and soil interaction pseudo-static experimental measuring device and its installation method | |
| CN206223564U (en) | A kind of fixed loading device based on side slope | |
| CN105928791A (en) | Method of in-situ measurement of upper rock mass stress and in-situ direct shear test for weak intercalated layer between rock mass layers | |
| CN112414733B (en) | Shield tunnel structure mechanical property model test system and method | |
| CN104729988A (en) | Device and method for testing bond-slip performance of new concrete and old concrete | |
| CN110686980B (en) | Tunnel excavation analogue means under inhomogeneous side direction load | |
| CN104964840A (en) | Secondary lining arch foot sedimentation experiment loading device and application method | |
| CN107941594A (en) | A kind of multifunction test device for liner structure | |
| CN103512811B (en) | A kind of boxshear apparatus | |
| CN204475154U (en) | Bearing capacity is adjustable bridge vibration absorption and isolation support | |
| CN103257082B (en) | Method of reducing sample disturbances of direct shear test and cutting ring | |
| CN206986728U (en) | A kind of walking incremental launching construction by multipoint jacking workbench | |
| CN206916800U (en) | The sinking bucket foundation soil body changes experimental rig | |
| CN205175534U (en) | Normal position weighing device based on axis car | |
| CN202903619U (en) | Shear test device for observing mechanical property of underwater soil and structural interface | |
| CN207215596U (en) | Multiple Shape is more than chi pressure from surrounding rock simulation experiment system | |
| CN201689014U (en) | Portable base plate specific pressure testing device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20190119 |