CN113607014B - Composite shock insulation structure for tunnel blasting - Google Patents
Composite shock insulation structure for tunnel blasting Download PDFInfo
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- CN113607014B CN113607014B CN202110912729.6A CN202110912729A CN113607014B CN 113607014 B CN113607014 B CN 113607014B CN 202110912729 A CN202110912729 A CN 202110912729A CN 113607014 B CN113607014 B CN 113607014B
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- tunnel
- shock absorption
- shock
- bottom plate
- energy dissipation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
Abstract
The invention relates to a composite shock insulation structure for tunnel blasting, which comprises a shock absorption ditch positioned between a newly-built tunnel and an original tunnel, wherein the shock absorption ditch extends along the up-down direction, two shock absorption hole groups are further arranged between the newly-built tunnel and the original tunnel, the two shock absorption hole groups are distributed on two sides of the shock absorption ditch in the horizontal direction, each shock absorption hole group comprises at least two rows of shock absorption hole rows, shock absorption holes in the same row of shock absorption hole rows are distributed along the up-down direction, the shock absorption hole rows are distributed along the left-right direction, and the shock absorption holes in the adjacent two rows of shock absorption hole rows are staggered along the up-down direction. The invention aims to provide a composite shock insulation structure for tunnel blasting, which can play a role in reinforcing a tunnel brushing layer and is used for protecting an existing tunnel entrance during tunnel construction.
Description
Technical Field
The invention belongs to the technical field of engineering construction, and particularly relates to a composite shock insulation structure for tunnel blasting.
Background
Along with the continuous perfection of road traffic systems, the range of road engineering is gradually increased, tunnel engineering is an important ring in traffic construction, and in order to promote comprehensive three-dimensional traffic development of the Yangtze river economic zone, to strengthen the road systems, to optimize resource allocation, in mountainous areas, mountain tunnels are required to excavate and blast, and how to lighten the influence on the existing building or the existing tunnel traffic process is always a major concern. In the existing tunnel traffic process, a new tunnel is developed beside, if the new tunnel is exploded, the existing tunnel traffic problem can be definitely caused, the safe driving of vehicle staff is affected, and the problem that the influence caused by the blast wave is reduced is needed to be solved. Especially, at the port part when the newly built tunnel is just started to be built, shock insulation is not carried out, and the plastering surface layer of the tunnel portal of the existing tunnel is easy to damage and fall off.
Disclosure of Invention
The invention aims to provide a composite shock insulation structure for tunnel blasting, which can play a role in reinforcing a tunnel brushing layer and is used for protecting an existing tunnel entrance during tunnel construction.
The above problems are solved by the following technical scheme: the utility model provides a compound shock insulation structure of tunnel blasting, is including being located the shock attenuation ditch between newly-built tunnel and the former tunnel, the shock attenuation ditch extends along the upper and lower direction, still be equipped with two shock attenuation hole groups between newly-built tunnel and the former tunnel, two shock attenuation hole group distributes in the both sides of the horizontal direction of shock attenuation ditch, shock attenuation hole group includes two at least rows of shock attenuation hole rows, and the shock attenuation hole in same row shock attenuation hole row distributes along the upper and lower direction, and the shock attenuation hole row distributes along the left and right directions, and the shock attenuation hole in two adjacent rows of shock attenuation hole rows staggers along the upper and lower direction. According to the invention, the damping grooves and the damping holes are arranged at the parts of the tunnel openings between the new tunnel and the old tunnel, so that the mountain body at the tunnel opening can be protected, and falling and landslide of the mountain body at the tunnel opening during blasting are prevented; when the mountain surface of tunnel portal is whitewashed, cement fills pouring hole and shock attenuation ditch in, plays the effect that improves the connection effect of whitewashing layer. The shock absorption groove can be filled with concrete to form a writing board for writing characters such as tunnel names and the like, so that the problem that the existing writing board is easy to fall off when directly coating a layer of cement on the surface of a mountain is solved.
The invention also comprises a cyclic utilization type shock insulation frame, wherein the cyclic utilization type shock insulation frame comprises an annular metal bottom plate supported on the mountain surface between a newly-built tunnel and an original tunnel, a metal panel connected with the annular metal bottom plate through a metal cylinder, rubber bags penetrating through a shock absorption ditch and connected with the annular metal bottom plate, and a plurality of rubber blind pipes penetrating through the shock absorption holes and connected with the annular metal bottom plate in a one-to-one correspondence manner, the annular metal bottom plate extends along the circumferential direction of the opening end of the rubber bag and is in sealed butt joint with the opening of the rubber bag, the metal panel, the metal cylinder, the annular metal bottom plate and the rubber bags enclose a first air cavity, the metal panel is provided with a pressure limiting valve limiting the pressure in the first air cavity, the annular metal bottom plate is provided with a plurality of air holes communicated with the first air cavity, the opening ends of the rubber blind pipes are in one-to-one correspondence with the air holes so that the rubber blind pipes are communicated with the first air cavity, and the air pressure in the first air cavity is more than 7 standard atmospheric pressure. The impact force generated by explosion extrudes the rubber bag and the rubber blind pipe to be absorbed by vibration, the result of the vibration absorption is that the air pressure in the first air cavity rises, and when the air pressure rises to the set pressure limiting valve to be opened, the pressure relief has the function of vibration absorption. The annular metal bottom plate is contacted with the mountain, and the recoil force generated during pressure relief is not easy to damage, so that the safety and the reliability are good. After construction of one place is completed, the air in the first air cavity is discharged, so that the cyclic utilization type shock insulation frame can be conveniently retracted. The first air cavity can be reused after being supplemented with air when the next construction site is constructed.
Preferably, the opening area of the rubber bag is smaller than that of the annular metal bottom plate, the opening shape of the rubber bag is similar to that of the annular metal bottom plate, the opening end of the rubber bag is arranged in the annular metal bottom plate in a penetrating mode and is provided with a flanging which is lapped on the front side surface of the annular metal bottom plate, and the flanging and the opening end of the rubber bag are fixedly connected with the annular metal bottom plate in a sealing mode. The rubber bag can be prevented from falling off from the annular metal bottom plate due to the fact that the internal air pressure rising force generated when the rubber bag is impacted and contracted by the blast, and the connecting effect of the rubber bag and the annular metal bottom plate can be improved.
Preferably, the damping groove is filled with sand, and the rubber bag is blocked at the opening end of the damping groove to prevent the sand from falling out of the damping groove. Filling sand can improve the shock attenuation effect, and sand can be used when whitewashing fitment tunnel portal moreover. Because the damping ditch is on the vertical wall, this structure has solved the problem that sand can drop.
Preferably, the metal cylinder exceeds the metal panel to form a cylinder section, and the friction energy dissipation plate is connected in a sliding manner in the cylinder section and is connected with the metal panel through the shock absorption tension spring. After the pressure limiting valve is opened, the air flow can lead to the movement of the name energy dissipation plate, and the movement result is that the shock absorbing tension spring deforms to dissipate energy, and the friction energy dissipation plate and the cylinder body section are in friction energy dissipation.
Preferably, the metal panel is provided with a panel part slide tube, and the friction energy dissipation plate is provided with an energy dissipation plate part slide tube; the energy dissipation plate part slide tube and the panel part slide tube are both arranged outside the other in a sliding sealing manner; the friction energy dissipation plate, the energy dissipation plate part slide pipe, the panel part slide pipe and the metal panel enclose a second air cavity, and the pressure limiting valve is positioned in the second air cavity. Because the friction energy dissipation plate and the cylinder body section need to be rubbed, air leakage can be generated between the friction energy dissipation plate and the cylinder body section, and the generation of the air leakage can lead to poor energy dissipation effect generated after the pressure limiting valve is opened. The technical proposal solves the problem.
Preferably, the panel part slide tube passes through the metal panel and then penetrates into the rubber bag, and the shock absorbing tension spring is positioned in the second air cavity. The installation of the large shock-absorbing tension spring can be realized on the premise of compact structure.
Preferably, the second air cavity is provided with a pressure relief valve positioned on the friction energy dissipation plate. The friction energy dissipation plate and the shock absorption tension spring are convenient to reset.
Preferably, a cylinder part friction layer is arranged on the inner peripheral surface of the cylinder section, an energy dissipation plate part friction layer is arranged on the outer peripheral surface of the friction energy dissipation plate, and the friction energy dissipation plates are in sliding connection with the cylinder part friction layer through the energy dissipation plate part friction layer in a abutting mode. The friction energy dissipation effect between the friction energy dissipation plate and the rod body section can be improved.
Preferably, the first air cavity is provided with an air charging valve positioned on the metal cylinder. After the use, the inflatable reset is carried out conveniently.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the damping grooves and the damping holes are arranged at the parts of the tunnel openings between the new tunnel and the old tunnel, so that the mountain body at the tunnel opening can be protected, and falling and landslide of the mountain body at the tunnel opening during blasting are prevented; when the mountain surface of tunnel portal is whitewashed, cement fills pouring hole and shock attenuation ditch in, plays the effect that improves the connection effect of whitewashing layer. The shock absorption groove can be filled with concrete to form a writing board for writing characters such as tunnel names and the like, so that the problem that the existing writing is easy to fall off when the surface of a mountain is directly coated with a layer of cement is solved; the shock absorption holes in adjacent rows in the multiple rows of shock absorption holes are staggered, so that the integrity of the explosion area is weakened, and the influence of the blast wave can be weakened at the position close to the source; the shock absorption holes are arranged between two tunnels, and the propagation path of the explosion wave is transformed layer by layer in the wave propagation process, so that the impact power of the explosion wave is weakened gradually, the influence on the existing train passing tunnel in the explosion process is reduced, and a good shock absorption and buffering effect is achieved.
Drawings
FIG. 1 is a schematic front view of a first embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a second embodiment of the present invention taken through a horizontal plane along the direction of tunnel extension;
fig. 3 is an enlarged partial schematic view at a of fig. 2.
In the figure: the novel energy dissipation device comprises a new tunnel 1, an original tunnel 2, a damping ditch 3, damping holes 4, a mountain surface 5 between the new tunnel and the original tunnel, an annular metal bottom plate 6, a metal cylinder 7, a metal panel 8, a rubber bag 9, a rubber blind pipe 10, a first air cavity 11, a pressure limiting valve 12, an outward flange 13, sand 14, a cylinder section 15, a friction energy dissipation plate 16, a shock absorption tension spring 17, a panel part slide pipe 18, an energy dissipation plate part slide pipe 19, a second air cavity 20, a pressure relief valve 21, a cylinder part friction layer 22, an energy dissipation plate part friction layer 23 and an inflation valve 24.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment, see fig. 1, a compound shock insulation structure of tunnel blasting, including being located the damping ditch 3 between newly-built tunnel 1 and original tunnel 2, damping ditch extends along the upper and lower direction, still is equipped with two shock attenuation hole groups between newly-built tunnel and the original tunnel, two shock attenuation hole groups distribute in the both sides of the horizontal direction of damping ditch, and shock attenuation hole group includes two at least rows of shock attenuation hole rows, and shock attenuation hole 4 in same row shock attenuation hole row distributes along the upper and lower direction, and shock attenuation hole row distributes along the left and right directions, and the shock attenuation hole in two adjacent rows of shock attenuation hole rows staggers along the upper and lower direction. After blasting is completed, when the mountain surface 5 between the newly-built tunnel and the original tunnel is subjected to leveling reinforcement marking by brushing a concrete layer on the tunnel hole, the concrete is filled into the damping hole and the damping groove to form the reinforcing foot of the crushing layer.
Embodiment two differs from embodiment one in that:
referring to fig. 2, the shock-absorbing structure further comprises a cyclic shock-absorbing frame, wherein the cyclic shock-absorbing frame comprises an annular metal bottom plate 6 supported on the surface of a mountain between a newly-built tunnel and an original tunnel, a metal panel 8 connected with the annular metal bottom plate through a metal cylinder 7, a rubber bag 9 connected with the annular metal bottom plate and penetrating through a shock absorption groove, and a plurality of rubber blind pipes 10 connected with the annular metal bottom plate and penetrating through the shock absorption holes in a one-to-one correspondence manner. The annular metal bottom plate extends along the circumference of the opening end of the rubber bag and is in sealing butt joint with the opening of the rubber bag. The metal panel, the metal cylinder, the annular metal bottom plate and the rubber bag enclose a first air cavity 11, a pressure limiting valve 12 for limiting the pressure in the first air cavity is arranged on the metal panel, a plurality of air holes communicated with the first air cavity are arranged on the annular metal bottom plate, the opening ends of the rubber blind pipes are in sealing butt joint with the air holes in a one-to-one correspondence manner, so that the rubber blind pipes are communicated with the first air cavity, and the air pressure in the first air cavity is more than 7 standard atmospheric pressures. The opening area of the rubber bag is smaller than that of the annular metal bottom plate, the opening shape of the rubber bag is similar to that of the annular metal bottom plate, the opening end of the rubber bag is arranged in the annular metal bottom plate in a penetrating mode and is provided with an outward flange 13 which is lapped on the front side surface of the annular metal bottom plate, and the outward flange and the opening end of the rubber bag are fixedly connected with the annular metal bottom plate in a sealing mode. The shock absorption groove is filled with sand 14, and the rubber bag is blocked at the opening end of the shock absorption groove to prevent the sand from falling out of the shock absorption groove. The metal cylinder exceeds the metal panel to form a cylinder section 15, a friction energy dissipation plate 16 is connected in a sliding manner in the cylinder section, and the friction energy dissipation plate is connected with the metal panel through a shock absorption tension spring 17. The metal panel is provided with a panel part slide tube 18, and the friction energy dissipation plate is provided with an energy dissipation plate part slide tube 19; the energy dissipation plate part slide tube is arranged in the panel part slide tube in a sliding way; the friction energy dissipation plate, the energy dissipation plate part slide pipe, the panel part slide pipe and the metal panel enclose a second air cavity 20, and the pressure limiting valve is positioned in the second air cavity. The panel part slide tube penetrates through the metal panel and then penetrates into the rubber bag, and the shock absorbing tension spring is positioned in the second air cavity. The second air chamber is provided with a pressure relief valve 21 located on the friction energy dissipating plate. The inner peripheral surface of the cylinder section is provided with a cylinder part friction layer 22, the outer peripheral surface of the friction energy dissipation plate is provided with an energy dissipation plate part friction layer 23, and the friction energy dissipation plates are in sliding connection with the cylinder part friction layer through the abutting joint of the energy dissipation plate part friction layer. The first air chamber is provided with an air charge valve 24 located on the canister.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles of the present invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The composite shock insulation structure for tunnel blasting is characterized by comprising a shock absorption ditch positioned between a newly-built tunnel and an original tunnel, wherein the shock absorption ditch extends along the up-down direction, two shock absorption hole groups are further arranged between the newly-built tunnel and the original tunnel, the two shock absorption hole groups are distributed on two sides of the shock absorption ditch in the horizontal direction, each shock absorption hole group comprises at least two rows of shock absorption hole rows, shock absorption holes in the same row of shock absorption hole rows are distributed along the up-down direction, the shock absorption hole rows are distributed along the left-right direction, and the shock absorption holes in the adjacent two rows of shock absorption hole rows are staggered along the up-down direction; the utility model provides a compound shock insulation structure of tunnel blasting still includes cyclic utilization formula shock insulation frame, cyclic utilization formula shock insulation frame is including supporting the annular metal bottom plate on the mountain surface between newly-built tunnel and original tunnel, through the metal drum with annular metal bottom plate link together metal panel, connect the rubber bag of wearing to establish in the shock attenuation ditch on annular metal bottom plate and connect a plurality of one-to-one ground on annular metal bottom plate wear to establish rubber blind pipe in the shock attenuation hole, annular metal bottom plate is followed the circumference of the open end of rubber bag extends and dock together with the opening seal of rubber bag, metal panel, metal drum, annular metal bottom plate and rubber bag enclose into first air cavity, be equipped with the pressure limiting valve of restriction pressure in the first air cavity on the metal panel, be equipped with a plurality of gas pockets with first air cavity intercommunication on the annular metal bottom plate, the open end one-to-one with the gas pocket seals dock together and makes rubber blind pipe and first air cavity intercommunication, the atmospheric pressure in the first air cavity is more than 7 standard atmospheric pressure.
2. The tunnel blasting composite shock insulation structure according to claim 1, wherein the opening area of the rubber bag is smaller than the opening area of the annular metal bottom plate, the opening shape of the rubber bag is similar to the opening shape of the annular metal bottom plate, the opening end of the rubber bag is arranged in the annular metal bottom plate in a penetrating manner and is provided with an outward flange which is lapped on the front side surface of the annular metal bottom plate, and the outward flange and the opening end of the rubber bag are fixedly connected with the annular metal bottom plate in a sealing manner.
3. A composite shock insulation structure for tunnel blasting according to claim 1 or 2, wherein the shock absorbing trench is filled with sand, and the rubber bag is blocked at the opening end of the shock absorbing trench to prevent the sand from falling out of the shock absorbing trench.
4. The composite shock insulation structure for tunnel blasting according to claim 1 or 2, wherein the metal cylinder extends beyond the metal panel to form a cylinder section, and a friction energy dissipation plate is slidably connected to the cylinder section, and the friction energy dissipation plate is connected with the metal panel through a shock absorption tension spring.
5. The composite shock insulation structure for tunnel blasting according to claim 4, wherein the metal panel is provided with a panel portion slide tube, and the friction energy dissipation plate is provided with an energy dissipation plate portion slide tube; the energy dissipation plate part slide tube and the panel part slide tube are both arranged outside the other in a sliding sealing manner; the friction energy dissipation plate, the energy dissipation plate part slide pipe, the panel part slide pipe and the metal panel enclose a second air cavity, and the pressure limiting valve is positioned in the second air cavity.
6. The composite shock insulation structure for tunnel blasting according to claim 5, wherein the panel part slide tube penetrates through the metal panel and then penetrates into the rubber bag, and the shock absorption tension spring is located in the second air cavity.
7. A composite shock insulation structure for tunnel blasting according to claim 5, wherein the second air chamber is provided with a relief valve on the friction-dissipating plate.
8. The composite shock insulation structure for tunnel blasting according to claim 4, wherein a cylinder part friction layer is provided on an inner peripheral surface of the cylinder section, an energy dissipation plate part friction layer is provided on an outer peripheral surface of the friction energy dissipation plate, and the friction energy dissipation plates are slidably connected together by abutting the energy dissipation plate part friction layer on the cylinder part friction layer.
9. A composite shock insulation structure for tunnel blasting according to claim 1 or 2, wherein the first air chamber is provided with an air valve on the canister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110912729.6A CN113607014B (en) | 2021-08-10 | 2021-08-10 | Composite shock insulation structure for tunnel blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110912729.6A CN113607014B (en) | 2021-08-10 | 2021-08-10 | Composite shock insulation structure for tunnel blasting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113607014A CN113607014A (en) | 2021-11-05 |
| CN113607014B true CN113607014B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110912729.6A Active CN113607014B (en) | 2021-08-10 | 2021-08-10 | Composite shock insulation structure for tunnel blasting |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4943172A (en) * | 1989-03-30 | 1990-07-24 | Drilco Industrial, Inc. | Drill deck bushing |
| CN107339921A (en) * | 2017-07-11 | 2017-11-10 | 中交隧道工程局有限公司 | A kind of subway foundation pit blasting method |
| CN110345826B (en) * | 2019-05-22 | 2020-07-31 | 北京理工大学 | Method for protecting smooth blasting vibration in tunnel |
| CN211205069U (en) * | 2019-06-15 | 2020-08-07 | 马培广 | Vibration reduction blasting device for tunnel construction |
| CN212133471U (en) * | 2020-04-08 | 2020-12-11 | 中铁十一局集团城市轨道工程有限公司 | A shock-absorbing structure that is used for blasting to advance hole in existing station |
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2021
- 2021-08-10 CN CN202110912729.6A patent/CN113607014B/en active Active
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