CN220084850U - Test device for influence of rock mass blasting excavation on highway subgrade - Google Patents
Test device for influence of rock mass blasting excavation on highway subgrade Download PDFInfo
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- CN220084850U CN220084850U CN202321228382.4U CN202321228382U CN220084850U CN 220084850 U CN220084850 U CN 220084850U CN 202321228382 U CN202321228382 U CN 202321228382U CN 220084850 U CN220084850 U CN 220084850U
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- 239000011435 rock Substances 0.000 title claims abstract description 88
- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000005422 blasting Methods 0.000 title claims abstract description 31
- 238000009412 basement excavation Methods 0.000 title claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 13
- 230000035485 pulse pressure Effects 0.000 claims description 9
- 239000004575 stone Substances 0.000 abstract description 8
- 238000005381 potential energy Methods 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000004880 explosion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a test device for influence of rock mass blasting excavation on highway subgrade in the field of blasting experiments, which comprises a base, wherein a reference box is fixedly connected to one side wall of the base in the width direction, a first opening is formed in the top of the reference box, and fine sand is filled in the reference box; one end fixedly connected with supporting seat that the base top is close to the case of consulting is equipped with the pipeline on the supporting seat, and the one end of pipeline is located the case top of consulting, and the other end of pipeline runs through supporting seat and fixedly connected with inside hollow riser. The limiting plate is driven to move by rotating the screw rod, and is used for fixing the test rock body, so that the test rock body is prevented from being greatly moved to influence the experimental result in blasting to a certain extent; and the gravitational potential energy of the reference ball is judged by observing the falling quantity, falling speed and the falling depth and distance of the reference ball on fine sand, so that the influence of broken stone on the rock body on the roadbed when the rock body is blasted is simulated to a certain extent.
Description
Technical Field
The utility model belongs to the field of blasting experiments, and particularly relates to a device for testing influence of rock mass blasting excavation on highway subgrade.
Background
The problem that blasting excavation effect influences roadbed beside rock mass is increasingly outstanding, and the difficulty and cost for manually maintaining rock mass stability are increasingly high. Rock mass stabilization is a precondition for open-air safe production, and once the rock mass is unstable, collapse occurs in the construction process, and immeasurable results are produced. By means of blasting, a dynamic instability damage mechanism of the rock mass is searched, and the method has important significance for the sustainable development of economic construction in China, and becomes one of important research subjects to be solved urgently in the blasting engineering and rock mechanics.
For example, chinese patent publication No. CN 211652858U discloses a test device for rock burst excavation effect on highway subgrade, the test device includes test rock, anti-rolling interception net and pulse pressure sensor, pulse pressure sensor sets up in test rock bottom, highway subgrade is in test rock same side, through detecting the dynamic characteristic and the law of vibration of blasting of rock, monitor the stress strain effect of road base, the effectual relevant information of acquireing, can effectively monitor the evolution characteristic and the law of rock slope space-time damage and displacement deformation, realize the damage, deformation and the vibration state simulation of engineering rock slope, provide test data for researching rock-soil vibration and roadbed displacement evolution mechanism, dynamic unstability mechanism and its catastrophe early warning method, provide scientific basis for the safe, smooth implementation of specific rock burst excavation engineering.
However, when the device is used for experiments, the experimental rock body is not fixed, and when the experimental rock body is blasted, the experimental rock body can be moved greatly, so that the experimental result can be influenced; when the rock mass is blasted, the device can not effectively simulate the influence of broken stone on the rock mass to the roadbed; therefore, it is necessary to provide a test device for the influence of rock burst excavation on the roadbed of a highway, which can fix a test rock and simulate the influence of broken stone on the rock on the roadbed to a certain extent when the broken stone falls on the roadbed.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide the test device which can fix the test rock and simulate the influence of rock burst excavation on the roadbed when broken stones on the rock fall on the roadbed to a certain extent.
In order to achieve the above object, the technical scheme of the present utility model is as follows: the device comprises a base, wherein a reference box is fixedly connected to one side wall in the width direction of the base, a first opening is formed in the top of the reference box, and fine sand is filled in the reference box; one end of the top of the base, which is close to the reference box, is fixedly connected with a supporting seat, a pipeline is arranged on the supporting seat, one end of the pipeline is positioned above the reference box, the other end of the pipeline penetrates through the supporting seat and is fixedly connected with a vertical plate with a hollow inside, and a plurality of reference balls are placed in the pipeline; one side of the riser far away from the pipeline is provided with a second opening, an elastic layer is fixedly connected to the second opening, a spring is fixedly connected to one side of the elastic layer close to the riser, one end of the spring far away from the elastic layer is fixedly connected with a push block, and the push block penetrates through the side wall of the riser and is in transverse sliding fit with the side wall of the riser.
One end of the top of the base, which is far away from the supporting seat, is fixedly connected with a supporting column, a screw is arranged on the supporting column, one end of the screw penetrates through the supporting column and is in running fit with a limiting plate, and the bottom of the limiting plate is in transverse sliding fit with the top of the base; the base top can be dismantled and be connected with experimental rock mass, and experimental rock mass is located between supporting seat and the limiting plate, and experimental rock mass top fixedly connected with pulse pressure sensor opens on the experimental rock mass has a plurality of blasting points.
After the scheme is adopted, the following beneficial effects are realized:
when the test bed is used, the reference box is simulated into a roadbed, and the test rock mass is arranged between the supporting seat and the limiting plate, so that one side of the test rock mass is tightly attached to the elastic layer; and then the clockwise screw rod is rotated, the screw rod drives the limiting plate to move leftwards until the limiting plate contacts with the other side of the test rock body, and therefore the test rock body is limited.
Then igniting a blasting point, blasting the test rock mass by the blasting point, and detecting a vibration rule during blasting by a pulse pressure sensor in the blasting process, and monitoring the blasting condition to obtain effective information; in the blasting process, the test rock body vibrates, the elastic layer vibrates due to the contact of the elastic layer and the test rock body, when the elastic layer vibrates leftwards, the spring can push the push block leftwards, the push block pushes the reference ball again, the reference ball moves under the pushing force of the push block so as to fall into the reference box, when the reference ball falls on fine sand, a round pit is formed on the fine sand, and the round pit can limit the reference ball; the user can observe the falling quantity, falling speed and depth and position distance of the reference ball on the fine sand to judge the gravitational potential energy of the reference ball, so that the influence of broken stone on the rock body on the roadbed when the rock body is blasted is simulated to a certain extent.
The utility model is different from the prior art in that the limiting plate is driven to move by rotating the screw rod, and the limiting plate fixes the test rock mass, so that the test rock mass is prevented from being greatly moved to influence the experimental result in blasting to a certain extent; and the gravitational potential energy of the reference ball is judged by observing the falling quantity, falling speed and the falling depth and distance of the reference ball on fine sand, so that the influence of broken stone on the rock body on the roadbed when the rock body is blasted is simulated to a certain extent.
Further, the one end fixedly connected with handle that limiting plate was kept away from to the screw rod.
The beneficial effects are that: the user can rotate the screw rod through the handle, and the handle is smoother and more convenient to rotate.
Further, an anti-skid sleeve is sleeved on the handle.
The beneficial effects are that: the anti-skid sleeve can increase the friction between the hand of the user and the handle, and the stability of the handle when the user rotates the handle is increased to a certain extent.
Further, the base top is detachably connected with a reversed concave support for covering the test rock mass.
The beneficial effects are that: since the test rock mass may be blasted out of debris when the test rock mass is blasted, a user may mount the inverted concave support on the base for covering the test rock mass prior to blasting the test rock mass to block the debris from splashing to some extent.
Further, grooves are formed in the upper parts of the two protruding ends of the inverted concave support.
The beneficial effects are that: when taking the inverted concave support, the finger can be placed in the groove on the inverted concave support, and the groove can limit the finger of a user, so that the user can conveniently take the finger.
Further, a rubber sleeve is fixedly connected in the groove.
The beneficial effects are that: the rubber sleeve can increase the friction force between the hands of a user and the grooves, so that the stability of the inverted concave support is improved to a certain extent.
Further, the whole reference box is of a transparent structure.
The beneficial effects are that: the reference box is transparent, so that a user can observe the reference ball to fall into the reference box relatively intuitively.
Further, the size of the base is 120X 100cm.
The beneficial effects are that: the size of the base is 120 multiplied by 100cm, and the whole device has smaller volume and is convenient for users to use and transfer.
Drawings
Fig. 1 is a cross-sectional view of an embodiment of the present utility model.
Fig. 2 is an isometric view of a base and inverted female support of an embodiment of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: base 1, reference case 2, fine sand 3, supporting seat 4, support column 5, screw rod 6, handle 7, limiting plate 8, test rock mass 9, pipeline 10, reference ball 11, riser 12, elastic layer 13, spring 14, ejector pad 15, blasting point 16, pulse pressure sensor 18, indent support 19.
Example 1
The embodiment is basically as shown in the accompanying figures 1-2:
the device for testing the influence of rock mass blasting excavation on highway subgrade comprises a base 1, wherein a reference box 2 is welded on one side wall of the base 1 in the width direction, a first opening is formed in the top of the reference box 2, and fine sand 3 is filled in the reference box 2; the top of the base 1 is welded with a supporting seat 4 near one end of the reference box 2, a pipeline 10 is arranged on the supporting seat 4, one end of the pipeline 10 is positioned above the reference box 2, the other end of the pipeline 10 penetrates through the supporting seat 4 and is fixedly connected with a vertical plate 12 with a hollow inside through bolts, and a plurality of reference balls 11 are placed in the pipeline 10; the riser 12 is kept away from one side of pipeline 10 and is opened there is the second opening, and second opening part is through bolt fixedly connected with elastic layer 13, and one side that elastic layer 13 is close to riser 12 is through bolt fixedly connected with spring 14, and the one end that spring 14 kept away from elastic layer 13 is through bolt fixedly connected with ejector pad 15, ejector pad 15 runs through riser 12 lateral wall and with riser 12 lateral wall horizontal sliding fit.
The top of the base 1 is welded with a support column 5 at one end far away from the support seat 4, a screw rod 6 is arranged on the support column 5, one end of the screw rod 6 penetrates through the support column 5 and is in running fit with a limiting plate 8, and the bottom of the limiting plate 8 is in transverse sliding fit with the top of the base 1; the top of the base 1 is detachably connected with a test rock mass 9, the test rock mass 9 is positioned between the supporting seat 4 and the limiting plate 8, the top of the test rock mass 9 is fixedly connected with a pulse pressure sensor 18 through bolts, the model of the pulse pressure sensor 18 is CY301 preferably, and a plurality of blasting points 16 are formed in the test rock mass 9.
The specific implementation process is as follows:
when the test bed is used, the reference box 2 is simulated into a roadbed, the test rock mass 9 is arranged between the supporting seat 4 and the limiting plate 8, and one side of the test rock mass 9 is tightly attached to the elastic layer 13; then, the clockwise screw rod 6 is rotated, and the screw rod 6 drives the limiting plate 8 to move leftwards until the limiting plate 8 contacts with the other side of the test rock body 9, so that the test rock body 9 is limited.
Then igniting the explosion point 16, wherein the explosion point 16 explodes the test rock mass 9, and in the explosion process, the pulse pressure sensor 18 can detect the vibration law during explosion, and monitor the explosion condition to acquire effective information; in the blasting process, the test rock mass 9 vibrates, as the elastic layer 13 is contacted with the test rock mass 9, the elastic layer 13 vibrates, when the elastic layer 13 vibrates leftwards, the spring 14 pushes the push block 15 leftwards, the push block 15 pushes the reference ball 11 again, the reference ball 11 moves under the pushing force of the push block 15, so that the reference ball moves to fall into the reference box 2, when the reference ball 11 falls on the fine sand 3, a round pit is formed on the fine sand 3, and the round pit can limit the reference ball 11; the user can observe the falling quantity and falling speed of the reference ball 11, the falling depth of the reference ball 11 on the fine sand 3 and the position distance to judge the gravitational potential energy of the reference ball 11, so that the influence of broken stone on the rock body on the roadbed when the rock body is exploded is simulated to a certain extent.
Example two
The difference from the above embodiment is that: one end of the screw rod 6 far away from the limiting plate 8 is fixedly connected with a handle 7 through a bolt.
The specific implementation process is as follows: the user can rotate the screw rod 6 through the handle 7, and the handle 7 is smoother and more convenient to rotate.
Example III
The difference from the above embodiment is that: an anti-skid sleeve is sleeved on the handle 7.
The specific implementation process is as follows: the anti-slip cover can increase the friction between the user's hand and the handle 7, and to some extent increase the stability of the user when turning the handle 7.
Example IV
The difference from the above embodiment is that: the top of the base 1 is detachably connected with a reversed concave bracket 19 for covering the test rock mass 9.
The specific implementation process is as follows: since the test rock 9 may be blasted out of debris when the test rock 9 is blasted, a user may mount an inverted concave support 19 on the base 1 for covering the test rock 9 before blasting the test rock 9, to some extent to block the debris from splashing.
Example five
The difference from the above embodiment is that: the upper parts of the two protruding ends of the inverted concave bracket 19 are provided with grooves.
The specific implementation process is as follows: when taking the inverted concave support 19, the fingers can be placed in the grooves on the inverted concave support 19, and the grooves can limit the fingers of a user so as to facilitate taking.
Example six
The difference from the above embodiment is that: a rubber sleeve is adhered and fixed in the groove.
The specific implementation process is as follows: the rubber sleeve can increase the friction between the user's hand and the groove, and to some extent the stability of the inverted female support 19 when it is taken.
Example seven
The difference from the above embodiment is that: the reference casing 2 has a transparent structure as a whole.
The specific implementation process is as follows: the reference casing 2 is transparent, and a user can observe the reference ball 11 to fall into the reference casing 2.
Example eight
The difference from the above embodiment is that: the size of the base 1 is 120X 100cm.
The specific implementation process is as follows: the size of the base 1 is 120 multiplied by 100cm, and the whole device has smaller volume and is convenient for users to use and transfer.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present utility model, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. A test device of rock mass blasting excavation to highway subgrade influence, its characterized in that: the device comprises a base, wherein a reference box is fixedly connected to one side wall of the base in the width direction, a first opening is formed in the top of the reference box, and fine sand is filled in the reference box; one end of the top of the base, which is close to the reference box, is fixedly connected with a supporting seat, a pipeline is arranged on the supporting seat, one end of the pipeline is positioned above the reference box, the other end of the pipeline penetrates through the supporting seat and is fixedly connected with a vertical plate with a hollow inside, and a plurality of reference balls are placed in the pipeline; the side, far away from the pipeline, of the vertical plate is provided with a second opening, an elastic layer is fixedly connected to the second opening, a spring is fixedly connected to one side, close to the vertical plate, of the elastic layer, a push block is fixedly connected to one end, far away from the elastic layer, of the spring, and the push block penetrates through the side wall of the vertical plate and is in transverse sliding fit with the side wall of the vertical plate;
one end of the top of the base, which is far away from the supporting seat, is fixedly connected with a supporting column, a screw is arranged on the supporting column, one end of the screw penetrates through the supporting column and is in running fit with a limiting plate, and the bottom of the limiting plate is in transverse sliding fit with the top of the base; the base top can be dismantled and be connected with experimental rock mass, and experimental rock mass is located between supporting seat and the limiting plate, and experimental rock mass top fixedly connected with pulse pressure sensor opens on the experimental rock mass has a plurality of blasting points.
2. The device for testing the influence of rock blasting excavation on highway subgrade according to claim 1, wherein: one end of the screw rod, which is far away from the limiting plate, is fixedly connected with a handle.
3. The device for testing the influence of rock blasting excavation on highway subgrade according to claim 2, wherein: the handle is sleeved with an anti-skid sleeve.
4. A test device for the impact of rock burst excavation on highway subgrade according to claim 3, in which: the base top is detachably connected with the inverted concave support that is used for covering the test rock mass.
5. The device for testing the influence of rock burst excavation on highway subgrade according to claim 4, which is characterized in that: the upper parts of the two protruding ends of the inverted concave support are provided with grooves.
6. The device for testing the influence of rock blasting excavation on highway subgrade according to claim 5, wherein: the groove is fixedly connected with a rubber sleeve.
7. The device for testing the influence of rock burst excavation on highway subgrade according to claim 6, wherein: the whole reference box is of a transparent structure.
8. The device for testing the influence of rock burst excavation on highway subgrade according to claim 7, wherein: the size of the base is 120X 100cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321228382.4U CN220084850U (en) | 2023-05-22 | 2023-05-22 | Test device for influence of rock mass blasting excavation on highway subgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321228382.4U CN220084850U (en) | 2023-05-22 | 2023-05-22 | Test device for influence of rock mass blasting excavation on highway subgrade |
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| Publication Number | Publication Date |
|---|---|
| CN220084850U true CN220084850U (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321228382.4U Active CN220084850U (en) | 2023-05-22 | 2023-05-22 | Test device for influence of rock mass blasting excavation on highway subgrade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220084850U (en) |
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2023
- 2023-05-22 CN CN202321228382.4U patent/CN220084850U/en active Active
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