CN207937274U - A kind of device of the irregular rock mass sample deformation parameter of test - Google Patents
A kind of device of the irregular rock mass sample deformation parameter of test Download PDFInfo
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- CN207937274U CN207937274U CN201820226440.2U CN201820226440U CN207937274U CN 207937274 U CN207937274 U CN 207937274U CN 201820226440 U CN201820226440 U CN 201820226440U CN 207937274 U CN207937274 U CN 207937274U
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- rock mass
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Abstract
The utility model discloses a kind of devices of the irregular rock mass sample deformation parameter of test, belong to rock mass engineering project exploratory techniques field.Include rock mass sample with central through hole, rock mass sample axial direction pressue device, load transfer device, country rock and measuring equipment；Pressue device, load transfer device are set in turn in above rock mass sample, and the top of load transfer device is fixedly connected by connector with country rock；Measuring equipment includes for measuring the amesdial of rock mass sample upper surface deflection, rock mass sample lateral deformation monitoring device and the multipoint displacement meter in rock mass sample central through hole, the utility model may be used irregular rock mass sample and be tested, both it had been convenient for the processing of rock mass sample that can also ensure the test accuracy of rock mass sample deformation parameter, had provided convenience for on-the-spot test rock mass sample mechanics parameter.
Description
Technical field
The utility model is related to a kind of devices and test method of the irregular rock mass sample deformation parameter of test, belong to rock mass
Engineering investigation technical field.
Background technology
It is well known that the mechanics parameter of rock mass plays the design and construction of the underground engineerings such as Tunnel Engineering, subway engineering
Very important effect, and existing Mechanics Parameters of Rock Mass testing experiment is mainly laboratory test and live in-situ test, no matter
Which kind of test method is required to be sampled rock mass, when encountering solid rock, is commonly present rock mass and is difficult to remove forming, size
The problems such as control difficulty is big causes test result error big, can not provide reference frame for the implementation of Practical Project.
Therefore, it is badly in need of proposing a kind of device and test method of test rock mass sample deformation parameter, used rock mass sample
Not only easy to process but also can be pressurized to avoid rock mass sample and bent influence test result, it carries for rock mass sample mechanics parameter on-the-spot test
For facility.
Utility model content
The utility model technical issues that need to address are to provide a kind of dress of the irregular rock mass sample deformation parameter of test
It sets and test method was both convenient for the processing of rock mass sample that can also ensure rock by testing irregular rock mass sample
The test accuracy of body sample deformation parameter is provided convenience for on-the-spot test rock mass sample mechanics parameter.
In order to solve the above technical problems, technical solution used by the utility model is：
A kind of device of the irregular rock mass sample deformation parameter of test, includes rock mass sample, rock mass with central through hole
Pressue device, load transfer device and the measuring equipment of sample axial direction；The pressue device, load transfer device are set in turn in rock mass sample
The top of top, load transfer device is fixedly connected by back steel sheet after counter-force with country rock；The measuring equipment includes for measuring rock
The amesdial of body sample upper surface deflection, rock mass sample lateral deformation monitoring device and in rock mass sample central through hole
Multipoint displacement meter.
Technical solutions of the utility model further improvement lies in that：The pressue device includes hydraulic jack, high pressure oil
Pipe, hydraulic pressure regulator and high-pressure oil pump, the hydraulic jack are sequentially connected by high-pressure oil pipe and hydraulic pressure regulator, high-pressure oil pump
It connects, a pressure gauge is also connected on the high-pressure oil pipe, a bearing plate is set between pressue device and rock mass sample upper surface.
Technical solutions of the utility model further improvement lies in that：The bearing plate is square the steel plate of cross section, holds
An amesdial is respectively set in the corner location of pressing plate.
Technical solutions of the utility model further improvement lies in that：The load transfer device includes force-transmitting pole, is used to support biography
It is fixedly connected by welding between back steel sheet after the steel plate of power column, force-transmitting pole and counter-force, back steel sheet passes through anchor bolt after the counter-force
It anchors at the top of country rock.
Technical solutions of the utility model further improvement lies in that：The force-transmitting pole be 3 steel pipes perpendicular to steel plate simultaneously
Distribution triangular in shape is integrated by reinforcement welding between the steel pipe.
Technical solutions of the utility model further improvement lies in that：It further include the fixing bracket for fixing amesdial.
Technical solutions of the utility model further improvement lies in that：The rock mass sample lateral deformation monitoring device is three
Circumferential survey line around rock mass sample is set in the annular groove of rock mass sample side surface, and spacing is between adjacent two circumferential surveys line
0.3m, it is described circumferential direction survey line be with weight can Free Transform nylon matter fishing line.
Technical solutions of the utility model further improvement lies in that：There are three measuring points for the multipoint displacement meter tool, for surveying
Axial deformation inside rock mass is measured, the rock mass specimen surface is additionally provided with the metallic channel for drawing multipoint displacement meter survey line.
By adopting the above-described technical solution, the technological progress that the utility model obtains is：
The experiment rock mass sample that the utility model uses is " up-small and down-big " irregular shape, this irregular rock mass examination
Sample is easy to scene and is processed, and can avoid rock mass sample and occur bending the phenomenon that causing discontinuity in pressurized process,
The significant increase convenience of rock mass sample mechanics parameter on-the-spot test.
The utility model additionally provides the device for testing this irregular rock mass sample deformation parameter, and the present apparatus has
The advantages that simple in structure, easy to operate, safe and reliable.
Further, hydraulic pressure regulator and high-pressure oil pump are used in the pressue device of the utility model, makes pressurization and subtracts
Pressure at the uniform velocity, ensures that the pressure ramp express delivery applied increases, improves the accuracy of measured test data.
Further, the utility model tests the deflection of rock mass sample upper surface by four amesdials, can keep away
Exempt to be characterized using single amesdial, causes that test error is big, the accuracy of test data is poor.
Further, the force-transmitting pole 3 in the load transfer device of the utility model design perpendicular to steel plate steel pipe and be in three
Angular distribution, and be integrated using reinforcement welding between steel pipe, it not only ensure that the stability of load transfer device but also be reaction force
Transmission provide guarantee.
Further, unloading is added using multiple partial circulating step by step during pressurizeing during the utility model experiment, is ensured
On-load pressure gently carries out, and to ensure safety operation, force-transmitting pole is avoided to topple over.
Description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model rock mass sample lateral deformation monitoring device schematic diagram；
Wherein, 1, rock mass sample, 2, country rock, 3, amesdial, 4, multipoint displacement meter, 5, circumferential survey line, 6, hydraulic jack,
7, bearing plate, 8, force-transmitting pole, 9, steel plate, 10, back steel sheet after counter-force, 11, fixing bracket, 12, billet.
Specific implementation mode
The utility model is described in further details with reference to embodiment：
As shown in Figure 1, a kind of device of the irregular rock mass sample deformation parameter of test, includes the rock mass with central through hole
Pressue device, load transfer device, country rock 2 and the measuring equipment of sample 1, rock mass sample axial direction；
A bearing plate 7 is arranged in the upper surface of rock mass sample 1, and a pressue device, wherein pressue device is arranged in 7 top of bearing plate
Including hydraulic jack 6, high-pressure oil pipe, hydraulic pressure regulator and high-pressure oil pump, hydraulic jack 6 is steady with hydraulic pressure by high-pressure oil pipe
Depressor, high-pressure oil pump are sequentially connected with, and a pressure gauge is also connected on high-pressure oil pipe, convenient for the variation of observation pressure, are avoided the occurrence of
The case where too fast or understressed of pressurizeing.Wherein, bearing plate 7 is square cross section steel plate, and its side length is 50cm, thickness to be
4cm。
The mandril of hydraulic jack 6 is connect by steel plate 9 with force-transmitting pole 8, and 8 top of force-transmitting pole passes through back steel sheet after a counter-force
10 connect with country rock 2, are wherein fixedly connected by welding together between back steel sheet 10 after force-transmitting pole 8 and counter-force, counter-force back
Steel plate 10 is anchored to by anchor bolt on country rock 2, prevents it from falling.As needed can between counter-force back steel sheet 10 and country rock 2
Concrete layer is set to ensure that back steel sheet 10 is in horizontality after counter-force.Further, observation hydraulic jack and steel plate it
Between gap size, billet 12 can be wedged and be allowed to close, on the one hand can on the one hand can be with the safety of ensuring equipment
Ensure the transmission of reaction force；Further, force-transmitting pole 8 is 3 steel pipes perpendicular to steel plate and distribution triangular in shape, the steel
It is integrated by reinforcement welding between pipe.
Measuring equipment includes for measuring the amesdial 3 of rock mass sample upper surface deflection, rock mass sample lateral deformation prison
Measurement equipment and the multipoint displacement meter 4 in rock mass sample through-hole.
Wherein the number of amesdial 3 is four, is fixed by being located at country rock inner fixed support 10, and make amesdial 3
Measuring rod be in contact with 7 upper surface of bearing plate, be laid in the corner location of bearing plate 7 respectively；
Rock mass sample lateral deformation monitoring device is three circumferential surveys line 5 for surrounding rock mass sample, adjacent two circumferential surveys
Line spacing is 0.3m, and it is 6~7m long nylon matter fishing lines that the circumferential direction survey line, which is length,.One end of circumferential survey line 5 is provided with weight,
It can Free Transform.
The tool of multipoint displacement meter 4 is there are three measuring point, and three measuring points are uniformly arranged in the central through hole of rock mass sample, i.e.,
First multipoint displacement meter is set to the position away from rock mass sample upper surface 0.3m, and second multipoint displacement meter is set to away from rock mass
The position of sample upper surface 0.6m, third multipoint displacement meter are set to the position away from rock mass sample upper surface 0.9m, the rock
It is additionally provided with the metallic channel for drawing multipoint displacement meter survey line on body sample, survey line is further prevented to be damaged, in survey line
Periphery is arranged plastic flexible pipe and is protected.
Lower interview carries out the test method of irregular rock mass sample deformation parameter using the device, specifically includes following step
Suddenly：
Step 1, early-stage preparations
1-1, prepare proving ground：Stalk the arch either Test Tunnel of flat-top form or preparation arch are excavated in testing ground
The country rock of shape or flat-top shape；
1-2, prepare experiment rock mass sample：So that experiment rock mass sample is removed with parent rock using presplit blasting method, prepares shape
Shape is in up-small and down-big rock mass sample, and carries out polishing and levelling amendment to rock mass sample using cement mortar；It is tried simultaneously along rock mass
The axial setting central through hole of sample；Rock mass sample is high about 1.5m, the area of upper surface is 0.5-1.0m2Cone table；In rock
The side surface of body sample, the wire casing of three circumferential directions closure is axially chiseled along rock mass sample from top to bottom, and ring is laid in wire casing
To survey line, adjacent two circumferential survey line spacing are 0.2-0.35m；
The installation and debugging of step 2, device, can start after instrument and equipment installation and debugging after the maintenance of certain time
Experiment.
It is placed into rock mass sample is tested in step 1 in country rock, and is installed successively on the upper surface of experiment rock mass sample
The top of load transfer device is fixedly attached on country rock by pressue device, load transfer device；
Amesdial is installed on fixing bracket, so that the measuring rod of amesdial is in contact with bearing plate upper surface, and to thousand
Table is divided to be calibrated；
Along the axial circumferential surveys line of laying from top to bottom three of rock mass sample, three circumferential surveys line are located in wire casing, each circumferential direction
Survey line is spaced about 0.3m.The periphery of rock mass sample is provided with steel bracket, one end of circumferential survey line is provided with small circle ring, ring
Small circle ring is passed through around one end after a week in wire casing inner ring to survey line, horizontally outward draws and turns to 90 ° downwards by steel bracket, in ring
To sagging one end of survey line, weight is set, it is specific as shown in Figure 2.
There are three the multipoint displacement meters of measuring point for setting tool in the central through hole of rock mass sample.
Step 3, experiment process
3-1, determine that maximum test pressure, maximum test pressure are 1.2 times of design pressure；
3-2, rock mass sample pre-pressing stage apply certain pressure to rock mass sample and carry out precompressed early period to rock mass sample,
Microfissure in rock mass sample is set to be closed, precompressed value can use 0.2MPa or so；
Determining maximum pressure is divided into 6 grades, is recorded after applying the first stage pressure first by 3-3, graded loading test pressure
The numerical value of measuring equipment records the numerical value of a measuring equipment every 10min, until release after stabilization, applies the second level
Pressure so repeats to add unloading operation, until completing the unloading of afterbody pressure, and records the measuring equipment under each stage pressure
Numerical value；
In addition, the reading requirement in stress-relief process is identical as pressurization；In addition to afterbody pressure is unloaded to zero, other pressures at different levels
Power should all retain contact 0.1MPa, to ensure safety operation, force-transmitting pole be avoided to topple over.
The processing of step 4, test data
4-1, it determines the cross-sectional area at three circumferential survey line positions on rock mass sample, is denoted as each delamination area, and calculate
Each upper compression of layering；
Each delamination area is determined using projection slices method, the side for specially using 24 weights and steel ruler to be combined
Method is respectively equidistantly positioned 6 weights in sample opposite sides, and the spacing of each two weight is 0.3m, and carries out plane projection, root
Item point is carried out to projected area according to the length and position that measure between obtained both sides corresponding position weight, delamination area item point
At 25 each grids, the sum of each grid area is delamination area.
4-2, draw each stage pressure and rock mass sample upper surface axial deformation, each zonal pressure and axial deformation curve and
Each layering axial deformation and lateral deformation curve；
4-3, rock mass sample elasticity modulus is calculated, according to pressure and rock mass sample upper surface axial deformation curve and each point
Stressor layer acquires 4 elasticity modulus with axial deformation curve, it is taken to be worth rock mass sample mean elasticity modulus；
4-4, rock mass sample Poisson's ratio is calculated, the layering of rock mass sample is acquired according to each layering axial deformation and lateral deformation and is moored
Loose ratio takes it to be worth rock mass sample mean Poisson's ratio.
The experiment rock mass sample that the utility model uses is " up-small and down-big " irregular shape, this irregular rock mass examination
Sample is easy to scene and is processed, and can avoid rock mass sample and occur bending the phenomenon that causing discontinuity in pressurized process,
The significant increase convenience of rock mass sample mechanics parameter on-the-spot test.The experiment that the utility model is more in line with construction site needs
It asks.
Claims (8)
1. a kind of device of the irregular rock mass sample deformation parameter of test, it is characterised in that：It include the rock mass with central through hole
Sample（1）, rock mass sample axial direction pressue device, load transfer device and measuring equipment；The pressue device, load transfer device are set successively
It is placed in above rock mass sample, the top of load transfer device passes through back steel sheet after counter-force（10）It is fixedly connected with country rock；The measurement dress
It sets including the amesdial for measuring rock mass sample upper surface deflection（3）, rock mass sample lateral deformation monitoring device and position
Multipoint displacement meter in rock mass sample central through hole（4）.
2. a kind of device of irregular rock mass sample deformation parameter of test according to claim 1, it is characterised in that：It is described
Pressue device includes hydraulic jack（6）, high-pressure oil pipe, hydraulic pressure regulator and high-pressure oil pump, the hydraulic jack pass through height
Pressuring oil pipe is sequentially connected with hydraulic pressure regulator, high-pressure oil pump, and a pressure gauge, pressue device and rock are also connected on the high-pressure oil pipe
A bearing plate is arranged between upper surface in body sample（7）.
3. a kind of device of irregular rock mass sample deformation parameter of test according to claim 2, it is characterised in that：It is described
Bearing plate（7）It is square cross section steel plate, steel plain size is differed with rock sample upper surface size to be not easy too greatly, bearing plate
An amesdial is respectively set in corner location（3）.
4. a kind of device of irregular rock mass sample deformation parameter of test according to claim 1, it is characterised in that：It is described
Load transfer device includes force-transmitting pole（8）, be used to support the steel plate of force-transmitting pole（9）, force-transmitting pole（8）With back steel sheet after counter-force（10）Between
It is fixedly connected by welding, back steel sheet after the counter-force（10）It is anchored at the top of country rock by anchor bolt.
5. a kind of device of irregular rock mass sample deformation parameter of test according to claim 4, it is characterised in that：It is described
Force-transmitting pole（8）For 3 steel pipes perpendicular to steel plate and distribution triangular in shape, it is integrated by reinforcement welding between the steel pipe.
6. a kind of device of irregular rock mass sample deformation parameter of test according to claim 1, it is characterised in that：Also wrap
Include the fixing bracket for fixing amesdial（11）.
7. a kind of device of irregular rock mass sample deformation parameter of test according to claim 1, it is characterised in that：It is described
Rock mass sample lateral deformation monitoring device is three circumferential directions being arranged in the annular groove of rock mass sample side surface around rock mass sample
Survey line（5）, spacing is 0.3m between adjacent two circumferential surveys line, the circumferential direction survey line be with weight can Free Transform nylon
Matter fishing line.
8. a kind of device of irregular rock mass sample deformation parameter of test according to claim 1, it is characterised in that：It is described
Multipoint displacement meter（4）There are three measuring points for tool, and for measuring axial deformation inside rock mass, the rock mass specimen surface is additionally provided with use
In the metallic channel for drawing multipoint displacement meter survey line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820226440.2U CN207937274U (en) | 2018-02-08 | 2018-02-08 | A kind of device of the irregular rock mass sample deformation parameter of test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820226440.2U CN207937274U (en) | 2018-02-08 | 2018-02-08 | A kind of device of the irregular rock mass sample deformation parameter of test |
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| CN207937274U true CN207937274U (en) | 2018-10-02 |
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| CN201820226440.2U Expired - Fee Related CN207937274U (en) | 2018-02-08 | 2018-02-08 | A kind of device of the irregular rock mass sample deformation parameter of test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781530A (en) * | 2019-03-13 | 2019-05-21 | 中国矿业大学 | A kind of in-site detecting device and method of floor undulation press in strength |
| CN110132714A (en) * | 2018-02-08 | 2019-08-16 | 山东高速济莱城际公路有限公司 | A kind of device and test method for testing irregular rock mass sample deformation parameter |
| CN114279859A (en) * | 2022-02-21 | 2022-04-05 | 中国电建集团西北勘测设计研究院有限公司 | On-site test method for measuring deformation modulus of soil and stone materials |
-
2018
- 2018-02-08 CN CN201820226440.2U patent/CN207937274U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132714A (en) * | 2018-02-08 | 2019-08-16 | 山东高速济莱城际公路有限公司 | A kind of device and test method for testing irregular rock mass sample deformation parameter |
| CN110132714B (en) * | 2018-02-08 | 2023-11-10 | 山东高速济莱城际公路有限公司 | Device and method for testing deformation parameters of irregular rock mass sample |
| CN109781530A (en) * | 2019-03-13 | 2019-05-21 | 中国矿业大学 | A kind of in-site detecting device and method of floor undulation press in strength |
| CN114279859A (en) * | 2022-02-21 | 2022-04-05 | 中国电建集团西北勘测设计研究院有限公司 | On-site test method for measuring deformation modulus of soil and stone materials |
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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: 20181002 Termination date: 20210208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |