CN205080015U - Apply device of transient state release stress wave in large -scale similar experimental system - Google Patents
Apply device of transient state release stress wave in large -scale similar experimental system Download PDFInfo
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- CN205080015U CN205080015U CN201520863107.9U CN201520863107U CN205080015U CN 205080015 U CN205080015 U CN 205080015U CN 201520863107 U CN201520863107 U CN 201520863107U CN 205080015 U CN205080015 U CN 205080015U
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- drop hammer
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- 230000001052 transient effect Effects 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 230000005484 gravity Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 239000011435 rock Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an apply device of transient state release stress wave in large -scale similar experimental system, including the test bench with drop hammer, the top of test bench is provided with two guide posts that are parallel to each other, drops hammer can follow two guide posts and slide from top to bottom, is provided with first pressure -bearing post and second pressure -bearing post between two guide posts, second pressure -bearing post is placed on the top of first pressure -bearing post, the initial position who drops hammer is located first, second pressure -bearing post and stacks the top of second pressure -bearing post afterwards, two all be provided with a plurality of stoppers of gliding of dropping hammer that are used for blockking on the guide post, it is highly the same that each stopper is located, and the top face of each stopper all is less than the distance of the top face of first pressure -bearing post to the bottom face that drops hammer to the distance of the bottom face that drops hammer. The utility model discloses can simulate the transient state release stress wave that engineerings such as large -scale submarine tunnel, deep mine tunnel produced in excavation process, solve current experiment and still stopped the problem of hanging down at the release rate of loading.
Description
Technical Field
The utility model belongs to the technical field of the analog simulation test, especially, relate to a device of applying transient state release stress ripples in large-scale similar experimental system.
Background
In recent years, in the excavation process of a plurality of large-scale submarine tunnels, deep mine roadways and other projects, the challenges of rock mass damage in a deep high-stress state and increase of the occurrence frequency of rock burst dynamic disasters are faced, and the rock mass physical and mechanical property experiments under corresponding conditions cannot be realized due to the limitation of experimental conditions. Therefore, part of scholars turn the research on the rock mechanics problems such as multiphase coupling, static and dynamic combination and the like to numerical simulation analysis, but a device for applying transient pressure relief stress waves is lacked in a large-scale similar experiment system.
In terms of mechanical nature, the construction of rock mass engineering is a stress redistribution process, and different geological conditions, construction modes or construction objects can cause different stress redistribution characteristics. Generally, at least one stress relief must be induced during the construction of the rock mass project. Meanwhile, the different construction modes of blasting construction, tunneling machine construction and the like have different influences on the stress release rate and stress redistribution rate of the rock mass, the deformation amount of the rock mass and the deformation rate, and even the difference is large. For example, the rock body pressure relief induced by the rock body blasting excavation process in a high ground stress state is a dynamic process, the time for the blasted rock body to separate from the mother rock and generate throwing motion is very short, and the pressure relief is instantaneous. However, the current research in laboratories still remains in the stage of low pressure relief rate, and it is difficult to apply transient pressure relief shock waves to the test piece, so the experimental data obtained when performing such experiments are different from the actual conditions.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an avoid the weak point that above-mentioned prior art exists, provide an easy and simple to handle's device of applying transient state release stress ripples in large-scale similar experimental system.
The utility model discloses the technical scheme who adopts does:
the utility model provides a device of applying transient state release stress wave in large-scale similar experimental system, includes test bench and drop hammer, and the top of test bench is provided with two guide posts that are parallel to each other, and the drop hammer can slide from top to bottom along two guide posts, is provided with first bearing post and second bearing post between two guide posts, and the second bearing post is placed on the top of first bearing post, and the initial position of drop hammer is located the top of second bearing post after first, second bearing post stack, two all be provided with a plurality of stoppers that are used for blockking the drop hammer gliding on the guide post, the height that each stopper was located is the same, and the distance of the top face of each stopper to the drop hammer bottom face all is less than the distance of the top face of first bearing post to the drop hammer bottom face.
The frequency and the amplitude of the transient pressure relief stress wave are changed by changing the mass of the drop hammer, the speed of striking the impact rod and the size and the shape of the second pressure bearing column.
The gravity centers of the drop hammer, the first pressure bearing column and the second pressure bearing column are located on the same straight line.
The device is characterized by further comprising a striking rod and a force application part, wherein the striking rod and the force application part are used for applying transverse acting force to the second pressure bearing column, one end of the striking rod is opposite to the central position of the second pressure bearing column in the vertical direction after the first pressure bearing column and the second pressure bearing column are stacked, and the other end of the striking rod is opposite to the force application part.
And a bracket for supporting the impact rod is arranged below the impact rod.
The support is a telescopic support, and a height adjusting switch is arranged on the support.
The contact surface of drop hammer and second pressure-bearing post, the contact surface of second pressure-bearing post and first pressure-bearing post are smooth surface, the height that highly is greater than the second pressure-bearing post of first pressure-bearing post, the horizontal sectional area of first pressure-bearing post is greater than the horizontal sectional area of second pressure-bearing post.
The cross-section of the drop hammer is H-shaped, and a hole groove used for placing the first pressure bearing column is formed in the test bed.
The stopper is detachable stopper.
The force application part is a manual or automatic force application device.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:
1. the utility model discloses can simulate the transient state release stress wave that engineering such as large-scale submarine tunnel, deep mine tunnel produced at the excavation in-process, solve current experiment and still stop the problem that ballast load rate is low.
2. The utility model discloses a propulsion process of simulation degree of depth excavation provides required transient state release stress wave, simple structure, and it is convenient to implement, and the effect is showing.
3. The utility model discloses only consider the analogue test of when confining pressure release in the aspect of the numerical simulation, the deformation destruction research of rock mass has very big effect under the lateral stress transient state release condition to the high stress state rock mass.
Drawings
Fig. 1 is a schematic structural diagram of the device of the present invention.
Fig. 2 is the assembly schematic diagram of the middle striking rod and the bracket of the present invention.
Fig. 3 is a waveform diagram of a transient pressure relief shock wave generated by the present invention.
Wherein,
1. test bench 2, support 3, striking rod 4, stopper 5, drop hammer 6, guide post 7, second bearing post 8, first bearing post 9, altitude mixture control switch
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, a device for applying transient pressure relief stress waves in a large-scale similar experiment system includes a test bed 1 and a drop hammer 5, the cross section of the drop hammer 5 is H-shaped, two guide posts 6 parallel to each other are arranged at the top end of the test bed 1, the drop hammer 5 can slide up and down along the two guide posts 6, a first pressure-bearing post 8 and a second pressure-bearing post 7 are arranged between the two guide posts 6, a hole groove for placing the first pressure-bearing post 8 is formed in the test bed 1, the second pressure-bearing post 7 is placed at the top end of the first pressure-bearing post 8, the height of the first pressure-bearing post 8 is greater than that of the second pressure-bearing post 7, and the transverse sectional area of the first pressure-bearing post 8 is greater than that of the second pressure-bearing post 7; the initial position of the drop hammer 5 is located at the top end of the second pressure-bearing column 7 after the first pressure-bearing column and the second pressure-bearing column are stacked, the gravity centers of the drop hammer 5, the first pressure-bearing column 8 and the second pressure-bearing column 7 are located on the same straight line, and the contact surfaces of the drop hammer 5 and the second pressure-bearing column 7 and the contact surfaces of the second pressure-bearing column 7 and the first pressure-bearing column 8 are smooth surfaces so as to ensure that the second pressure-bearing column 7 can be smoothly separated from the drop hammer 5 and the first pressure-bearing column 8; a plurality of limiting blocks 4 used for blocking the falling hammer 5 from sliding downwards are arranged on the two guide columns 6, the limiting blocks 4 are detachable limiting blocks, the heights of the limiting blocks 4 are the same, and the distance from the top end face of each limiting block 4 to the bottom end face of the falling hammer 5 is smaller than the distance from the top end face of the first pressure bearing column 8 to the bottom end face of the falling hammer 5; the device also comprises a striking rod 3 and a force application part, wherein the striking rod 3 is used for applying transverse acting force to the second pressure bearing column 7, the force application part is a manual or automatic force application device, one end of the striking rod 3 is over against the central position of the second pressure bearing column 7 in the vertical direction after the first pressure bearing column and the second pressure bearing column are stacked, the other end of the striking rod 3 is over against the force application part, and in order to facilitate the striking rod 3 to be over against the middle position of the second pressure bearing column 7, a striking point can be carved on the second pressure bearing column 7 in advance, and the striking point is the middle position of the second pressure bearing column 7 in the vertical direction; the below of impact bar 3 is provided with support 2 that is used for supporting impact bar 3, support 2 is telescopic support, is provided with altitude mixture control switch 9 on the support 2, and impact bar 3 can just be to the central point of second bearing post 8 when can guaranteeing impact bar 3 level and striking through the height of adjusting support 2.
With the present apparatus, a transient pressure relief shock wave can be generated, the waveform of which is shown in fig. 3, the frequency and amplitude of which can be changed by changing the mass of the drop hammer 5, the striking rate of the striking rod 3, and the size and shape of the second pressure bearing pillar 8, wherein Δ σ can be controlled by the mass of the body of the drop hammer 5, and Δ t can be controlled by the shape and size of the second pressure bearing pillar 7 and the striking rate of the striking rod 3.
The utility model discloses a change the stable pressure-bearing state between hammer 5 and first, the second bearing post that falls for second bearing post 7 breaks away from first bearing post 8 in the twinkling of an eye, because of blockking of stopper 4, hammer 5 that falls can not directly fall to contact with first bearing post 8, therefore can produce transient state release shock wave on first bearing post 8.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The device for applying the transient pressure relief stress waves in the large-scale similar experiment system is characterized by comprising a test bed and a drop hammer, wherein two guide columns which are parallel to each other are arranged at the top end of the test bed, the drop hammer can slide up and down along the two guide columns, a first pressure bearing column and a second pressure bearing column are arranged between the two guide columns, the second pressure bearing column is placed at the top end of the first pressure bearing column, the initial position of the drop hammer is positioned at the top end of the second pressure bearing column after the first pressure bearing column and the second pressure bearing column are stacked, a plurality of limiting blocks used for blocking the drop hammer to slide down are arranged on the two guide columns, the heights of the limiting blocks are the same, and the distance from the top end face of each limiting block to the bottom end face of the drop hammer is smaller than the distance from the top end face of the first pressure bearing column to the.
2. The apparatus for applying transient stress relief waves in a large scale similar experimental system as claimed in claim 1, wherein the frequency and amplitude of said transient stress relief waves are changed by changing the mass of the drop hammer, the striking speed of the impact rod and the size and shape of the second pressure bearing column.
3. The apparatus of claim 1, wherein the centers of gravity of the drop hammer, the first pressure bearing column, and the second pressure bearing column are located on a same straight line.
4. The apparatus according to claim 1, further comprising a striker bar and a force application part for applying a lateral force to the second pressure bearing column, wherein one end of the striker bar faces a central position of the second pressure bearing column in the vertical direction after the first and second pressure bearing columns are stacked, and the other end of the striker bar faces the force application part.
5. The device for applying transient pressure relief stress waves in a large scale similar experimental system according to claim 4, characterized in that a bracket for supporting the striker rod is arranged below the striker rod.
6. The apparatus according to claim 5, wherein the support is a telescopic support, and a height adjustment switch is disposed on the support.
7. The apparatus of claim 1, wherein the contact surface of the drop hammer with the second pressure bearing column and the contact surface of the second pressure bearing column with the first pressure bearing column are smooth surfaces, the height of the first pressure bearing column is greater than that of the second pressure bearing column, and the lateral cross-sectional area of the first pressure bearing column is greater than that of the second pressure bearing column.
8. The device for applying transient pressure relief stress waves in a large-scale similar experiment system according to claim 1, wherein the section of the drop hammer is H-shaped, and the test bed is provided with a hole groove for placing the first pressure bearing column.
9. The device for applying transient pressure relief stress waves in a large-scale similar experimental system according to claim 1, wherein said stopper is a detachable stopper.
10. The device for applying transient pressure relief stress waves in large scale similar experiment system according to claim 4, wherein said force applying part is a manual or automatic force applying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863107.9U CN205080015U (en) | 2015-11-02 | 2015-11-02 | Apply device of transient state release stress wave in large -scale similar experimental system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863107.9U CN205080015U (en) | 2015-11-02 | 2015-11-02 | Apply device of transient state release stress wave in large -scale similar experimental system |
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| CN205080015U true CN205080015U (en) | 2016-03-09 |
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| CN201520863107.9U Expired - Fee Related CN205080015U (en) | 2015-11-02 | 2015-11-02 | Apply device of transient state release stress wave in large -scale similar experimental system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259056A (en) * | 2015-11-02 | 2016-01-20 | 山东科技大学 | Device for exerting transient pressure relief stress waves in large-scale similar experiment system |
-
2015
- 2015-11-02 CN CN201520863107.9U patent/CN205080015U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259056A (en) * | 2015-11-02 | 2016-01-20 | 山东科技大学 | Device for exerting transient pressure relief stress waves in large-scale similar experiment system |
| CN105259056B (en) * | 2015-11-02 | 2018-05-08 | 山东科技大学 | Apply the device that transient state unloads compression stress wave in a kind of large-scale similar experiment system |
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| 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: 20160309 Termination date: 20161102 |