CN202024695U - Shock-absorbing protective device of soft composite air curtain with underwater demolition - Google Patents
Shock-absorbing protective device of soft composite air curtain with underwater demolition Download PDFInfo
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- CN202024695U CN202024695U CN2010206819080U CN201020681908U CN202024695U CN 202024695 U CN202024695 U CN 202024695U CN 2010206819080 U CN2010206819080 U CN 2010206819080U CN 201020681908 U CN201020681908 U CN 201020681908U CN 202024695 U CN202024695 U CN 202024695U
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- air curtain
- soft composite
- composite air
- flexible
- underwater demolition
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- 230000001681 protective effect Effects 0.000 title abstract description 5
- 239000002131 composite material Substances 0.000 title abstract 7
- 239000002344 surface layer Substances 0.000 claims abstract description 13
- 150000001875 compounds Chemical class 0.000 claims description 38
- 238000013016 damping Methods 0.000 claims description 19
- 239000000725 suspension Substances 0.000 claims description 19
- 230000001012 protector Effects 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 16
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000012783 reinforcing fiber Substances 0.000 abstract 2
- 230000003116 impacting effect Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000004880 explosion Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000005422 blasting Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect 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
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The utility model discloses a shock-absorbing protective device of a soft composite air curtain with underwater demolition, which comprises a soft composite air curtain, a counter weight and a hanging pull rope, wherein the upper edge and the lower edge of the soft composite air curtain are respectively provided with a plurality of hanging rings, the upper edge of the soft composite air curtain is connected with the hanging pull rope by the hanging rings, the lower edge of the soft composite air curtain is connected with the counter weight by the hanging rings, and the soft composite air curtain comprises an air cavity, a soft air curtain surface layer, a longitudinal reinforcing fiber cord thread, a transverse reinforcing fiber cord thread and an air cavity side wall. The shock-absorbing protective device embodies that the concept of conquering the unyielding with the yielding is adopted for impacting of the underwater demolition, and as the device has the advantages of high tenacity, large compression capacity, convenience for assembling and the like, the device can remarkably reduce impact waves of the underwater demolition, and can play a better protective role on a protected target.
Description
Technical field
The utility model relates to the engineering explosion technical field, relates in particular to the flexible compound air curtain damping protector under a kind of underwater demolition effect.
Background technology
Underwater demolition is widely used in: fields such as cofferdam demolition, harbor approach dredging, underwater foundation excavation, explosion compacting and treatment of soft foundation, explosion fill, chock blasting.Significantly different with the explosion in air and rock mass, underwater demolition positive pressure of shock wave peak value height, decay be slow, it is wide to involve scope, and be serious to the damage effect of building in the contiguous water.Current, both at home and abroad to land concussion of blasting attenuation law and existing more research and the summary of security control standard, but the achievement of underwater demolition aspect still relatively is short of.Along with the expansion of project scale and the complexity day by day of implementation condition, when carrying out the underwater demolition construction, must fully estimate concussion of blasting influences, and takes effective damping and safeguard procedures.
Water generally is regarded as incompressible continuous media, and the absorption of shock wave, attenuation are very limited, and the compressibility of gas is good, is a kind of desirable damping approach under water.Early stage Bubble Heavy Curtain damping is at first proposed by Canadian Adolph, and is applied to the underwater demolition construction damping in Ortario power station.Its basic thought is: by forming continuous rising, dense Bubble Heavy Curtain to feeding gases at high pressure under water, the kinetic energy of shock wave during by Bubble Heavy Curtain is converted into the interior energy of bubble by compression, and shock wave pressure is decayed to some extent.Further studies show that, Bubble Heavy Curtain has attenuating preferably to the energy of vibration frequency part in the middle of the shock wave in the water, attenuating to low frequency and HFS is unsatisfactory, divide the attenuation of characteristic parameter more limited for specific impulse and specific energy equivalance, this is because bubble lacks operative constraint, be easy under low frequency impacts disperse to crumble and fall or translation, endergonic effect descends.On the other hand, in the earthquake engineering field, have the scholar to propose to set up devices such as concrete cavity, steel cylinder at the dam upstream face, and in concrete cavity and steel cylinder stored-gas, to form the air curtain of discontinuity, reduce the additional flowing pressure of dam body upstream face under the earthquake conditions.But the input mechanism of earthquake hydrodynamic pressure load has different significantly with the underwater demolition impact.
In sum, when carrying out underwater demolition when construction, still there is not suitable, convenient, damping protector under water efficiently near the submerged structure the quick-fried source.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, and a kind of flexible compound air curtain damping protector of underwater demolition is provided.
The purpose of this utility model is achieved through the following technical solutions: a kind of flexible compound air curtain damping protector is characterized in that it comprises: flexible compound air curtain, counterweight and suspension drag-line; Wherein, the last bottom of flexible compound air curtain respectively has several suspension ring, and the top of flexible compound air curtain links to each other with the suspension drag-line by suspension ring, and the bottom of flexible compound air curtain links to each other with counterweight by suspension ring.
Further, described flexible compound air curtain comprises: air cavity, flexible air curtain surface layer, vertical fortifying fibre cord, horizontal fortifying fibre cord and air cavity sidewall.Air cavity is in flexible air curtain surface layer, and vertically fortifying fibre cord and horizontal fortifying fibre cord are on flexible air curtain surface layer, and the air cavity sidewall is between adjacent air cavity.
The beneficial effects of the utility model are: the flexible compound air curtain damping protector of the utility model underwater demolition has embodied underwater explosion impacted takes the thought of defeating a force with a tenderness; because this device has high tenacity, big compressed capability, characteristics such as convenient is installed; can significantly alleviate the underwater demolition shock wave, protected object is played protective action preferably.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a flexible compound air curtain part sectioned view;
Among the figure, flexible compound air curtain 1, suspension ring 2, counterweight 3, suspension drag-line 4, air cavity 5, flexible air curtain surface layer 6, vertical fortifying fibre cord 7, horizontal fortifying fibre cord 8, air cavity sidewall 9.
The specific embodiment
The object that needs in the Underwater Engineering explosion to lay special stress on protecting mainly is bridge pier, harbour, dam, embankment etc., is generally the non-contact demolition situation.For non-contact demolition, have ready conditions the damping protector is set between quick-fried source and protected object.According to the characteristics of underwater demolition shock wave, shock absorption principle of the present utility model is as follows: (1) flexible compound air curtain protector has bigger compressibility, can absorb impact energy by the compression of protector; (2) exist the interaction that is coupled admittedly of tangible stream between underwater demolition shock wave and the protector, adopt flexible protector to help to interact, reduce to act on the blasting impact load on the protector by flowing solid coupling; (3) protector itself has enough toughness and a Chinese People's Anti-Japanese Military and Political College's deformation ability, is unlikely to destroyed under the blasting impact load under water; (4) protector is lighter, should be more convenient when carrying out the engineering site installation.
Principle based on above-mentioned underwater demolition damping protection, the flexible compound air curtain damping protector of the utility model underwater demolition as shown in Figure 1, comprise flexible compound air curtain 1, counterweight 3 and hang drag-line 4, wherein, the last bottom of flexible compound air curtain 1 has several suspension ring 2, the top of flexible compound air curtain 1 links to each other with suspension drag-line 4 by suspension ring 2, and the bottom of flexible compound air curtain 1 links to each other with counterweight 3 by suspension ring 2.Fixing or suspension counterweight 4 can make flexible compound air curtain 1 can stretch and have certain pretension in water on the suspension ring 3.Hang drag-line 5 one ends and link to each other with suspension ring 2, the other end is fixed in more than the water surface.By hanging drag-line 5 flexible compound air curtain 1 is suspended in the water generally.
As shown in Figure 2, flexible compound air curtain 1 comprises: air cavity 5, flexible air curtain surface layer 6, vertical fortifying fibre cord 7, horizontal fortifying fibre cord 8 and air cavity sidewall 9.Flexible air curtain surface layer 6 generally can adopt flexible material such as rubber to make flexible air curtain surface layer 6 large deformation and toughness, can play the effect of transmitting load and distortion power consumption.In the flexible air curtain surface layer 6 air cavity 5 is arranged, air cavity 5 inner full air are compressed at impact load lower air chamber 6, and consume impact energy.For flexible compound air curtain 1 is strengthened, flexible air curtain surface layer 6 is provided with some vertical fortifying fibre cords 7 and horizontal fortifying fibre cord 8, vertical fortifying fibre cord 7 and horizontal fortifying fibre cord 8 are applied prestressing force, can make flexible compound air curtain 1 inside bear higher pressure.Air cavity sidewall 6 between the air cavity 5 is made by elastomeric material, plays the effect of cutting apart internal cavities.
The performing step that adopts the flexible compound air curtain device to carry out the protection of damping under water is:
(1) calculates the possible coverage of underwater demolition shock wave according to underwater demolition arrangement and method for construction (comprise explosion scope, explosive payload, order etc. detonates), determine to carry out the object of the protection of damping under water.
(2) calculate under the underwater demolition load, near the shock wave pressure the protected object according to the bearing capacity of protected object, is determined the wave absorption of the damping under water ability that need be provided by the flexible compound air curtain.
(3), select the flexible compound air curtain of suitable dimension according to damping wave absorption demand.
(4) adopt drag-line and counterweight that the flexible compound air curtain is arranged in waters between quick-fried source and the protected object, air curtain should be slightly near protected object generally speaking.
(5) can not reach the situation of expection wave absorption ability for one deck flexible compound air curtain, can be between quick-fried source and protected object arranging multiplayer flexible compound air curtain.
(6) shock wave that produces of underwater demolition through behind one or more layers flexible compound air curtain by wave absorption, the shock wave pressure that arrives the protected object surface reduces greatly.
(7) the flexible compound air curtain has utilized gas and flexible material to have the characteristics of high-compressibility, can reduce the underwater shock wave pressure significantly, and this Unit Installation is laid also relatively flexibly, can be applicable to various underwater demolition construction environments.
Claims (2)
1. the flexible compound air curtain damping protector of a underwater demolition is characterized in that it comprises: flexible compound air curtain (1), counterweight (3) and suspension drag-line (4); Wherein, the last bottom of flexible compound air curtain (1) respectively has several suspension ring (2), the top of flexible compound air curtain (1) links to each other with suspension drag-line (4) by suspension ring (2), and the bottom of flexible compound air curtain (1) links to each other with counterweight (3) by suspension ring (2).
2. according to the described flexible compound air curtain of claim 1 damping protector, it is characterized in that described flexible compound air curtain (1) comprising: air cavity (5), flexible air curtain surface layer (6), vertical fortifying fibre cord (7), horizontal fortifying fibre cord (8) and air cavity sidewall (9); Air cavity (5) is in flexible air curtain surface layer (6), and vertically fortifying fibre cord (7) and horizontal fortifying fibre cord (8) are on flexible air curtain surface layer (6), and air cavity sidewall (6) is between adjacent air cavity (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206819080U CN202024695U (en) | 2010-12-27 | 2010-12-27 | Shock-absorbing protective device of soft composite air curtain with underwater demolition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206819080U CN202024695U (en) | 2010-12-27 | 2010-12-27 | Shock-absorbing protective device of soft composite air curtain with underwater demolition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202024695U true CN202024695U (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206819080U Expired - Fee Related CN202024695U (en) | 2010-12-27 | 2010-12-27 | Shock-absorbing protective device of soft composite air curtain with underwater demolition |
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| CN (1) | CN202024695U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042787A (en) * | 2010-12-27 | 2011-05-04 | 浙江大学 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
| CN107883824A (en) * | 2017-10-20 | 2018-04-06 | 武汉大学 | Underwater demolition blast protection device |
| CN108827097A (en) * | 2018-05-10 | 2018-11-16 | 中国人民解放军61489部队 | A kind of wave absorber preventing Underwater Engineering target by blast impulse wave impact |
| CN110500135A (en) * | 2019-08-15 | 2019-11-26 | 国家电网有限公司 | A kind of tunnel entrance wind shielding structure and its construction method |
| CN110936009A (en) * | 2019-12-26 | 2020-03-31 | 湖北玉昊金属复合材料有限公司 | Shock wave protective guard and application thereof in explosive welding |
| CN113324453A (en) * | 2021-06-21 | 2021-08-31 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
-
2010
- 2010-12-27 CN CN2010206819080U patent/CN202024695U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042787A (en) * | 2010-12-27 | 2011-05-04 | 浙江大学 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
| CN107883824A (en) * | 2017-10-20 | 2018-04-06 | 武汉大学 | Underwater demolition blast protection device |
| CN108827097A (en) * | 2018-05-10 | 2018-11-16 | 中国人民解放军61489部队 | A kind of wave absorber preventing Underwater Engineering target by blast impulse wave impact |
| CN110500135A (en) * | 2019-08-15 | 2019-11-26 | 国家电网有限公司 | A kind of tunnel entrance wind shielding structure and its construction method |
| CN110936009A (en) * | 2019-12-26 | 2020-03-31 | 湖北玉昊金属复合材料有限公司 | Shock wave protective guard and application thereof in explosive welding |
| CN113324453A (en) * | 2021-06-21 | 2021-08-31 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
| CN113324453B (en) * | 2021-06-21 | 2022-12-23 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20131227 |