CN102042787A - Flexible composite air-curtain shock absorption protective device for underwater explosion - Google Patents
Flexible composite air-curtain shock absorption protective device for underwater explosion Download PDFInfo
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- CN102042787A CN102042787A CN2010106070692A CN201010607069A CN102042787A CN 102042787 A CN102042787 A CN 102042787A CN 2010106070692 A CN2010106070692 A CN 2010106070692A CN 201010607069 A CN201010607069 A CN 201010607069A CN 102042787 A CN102042787 A CN 102042787A
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- air curtain
- flexible
- flexible composite
- curtain
- composite air
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- 230000035939 shock Effects 0.000 title abstract description 17
- 238000004880 explosion Methods 0.000 title abstract description 11
- 238000010521 absorption reaction Methods 0.000 title abstract description 9
- 230000001681 protective effect Effects 0.000 title abstract description 4
- 239000002131 composite material Substances 0.000 title abstract 8
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims description 41
- 238000013016 damping Methods 0.000 claims description 22
- 230000001012 protector Effects 0.000 claims description 20
- 239000000725 suspension Substances 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 4
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000012783 reinforcing fiber Substances 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000009993 protective function Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 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
- 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
- 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 invention discloses a flexible composite air-curtain shock absorption protective device which comprises a flexible composite air curtain, a counterweight and a hanging pull rope, wherein the upper and lower sides of the flexible composite air curtain are respectively provided with a plurality of hanging rings, the upper side of the flexible composite air curtain is connected with the hanging pull rope through the hanging rings, and the lower side of the flexible composite air curtain is connected with the counterweight through the hanging rings; and the flexible composite air curtain comprises an air cavity, a flexible air curtain surface layer, longitudinal reinforcing fiber cord threads, transverse reinforcing fiber cord threads and air cavity side walls. The invention embodies the idea of conquering the unyielding with the yielding for the impact of the underwater explosion; and due to the characteristics of high toughness, high compression capacity, convenience in mounting and the like, the flexible composite air-curtain shock absorption protective device for underwater explosion can obviously relieve the impact waves of the underwater explosion and perform favorable protective function for the protected object.
Description
Technical field
The present invention relates to the engineering explosion technical field, relate 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.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of flexible compound air curtain damping protector of underwater demolition is provided.
The objective of the invention is to be 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 invention has the beneficial effects as follows: the flexible compound air curtain damping protector of underwater demolition of the present invention 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 invention;
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 invention 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 underwater demolition of the present invention 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 (5)
1. a flexible compound air curtain damping protector is characterized in that it comprises: flexible compound air curtain (1), counterweight (3) and suspension drag-line (4) etc.; 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) etc.; 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).
3. according to the described flexible compound air curtain of claim 1 damping protector, it is characterized in that described flexible air curtain surface layer (6) is made by flexible material.
4. according to the described flexible compound air curtain of claim 1 damping protector, it is characterized in that described flexible material is a rubber.
5. according to the described flexible compound air curtain of claim 1 damping protector, it is characterized in that described air cavity sidewall (6) is made by elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106070692A CN102042787A (en) | 2010-12-27 | 2010-12-27 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106070692A CN102042787A (en) | 2010-12-27 | 2010-12-27 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
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| CN102042787A true CN102042787A (en) | 2011-05-04 |
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| CN2010106070692A Pending CN102042787A (en) | 2010-12-27 | 2010-12-27 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358396A (en) * | 2011-06-16 | 2012-02-22 | 哈尔滨工程大学 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
| CN106679523A (en) * | 2016-12-29 | 2017-05-17 | 武汉大学 | Air buffer device used for eliminating underwater near-distance explosion shock waves |
| CN108760324A (en) * | 2018-06-13 | 2018-11-06 | 中航工程集成设备有限公司 | A kind of wave absorber of solid propellant rocket underwater test |
| CN110274527A (en) * | 2019-06-26 | 2019-09-24 | 湖南省航务工程有限公司 | A kind of delaying blasting device that underwater demolition security performance is high |
| CN111795625A (en) * | 2020-07-27 | 2020-10-20 | 武汉大学 | Method and device for protecting shock waves in water of blasting excavation of seabed foundation pit |
| CN112082441A (en) * | 2020-09-30 | 2020-12-15 | 广西新港湾工程有限公司 | Underwater blasting shock wave blocking device |
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| US6289816B1 (en) * | 1999-11-08 | 2001-09-18 | The United States Of America As Represented By The Secretary Of The Navy | Water-based apparatus to mitigate damage and injuries from a fully or partially confined explosion |
| CN101625221A (en) * | 2008-07-08 | 2010-01-13 | 张雷 | Dust-removing, splash-preventing, shock-absorbing and noise-eliminating system for directional blasting |
| CN202024695U (en) * | 2010-12-27 | 2011-11-02 | 浙江大学 | Shock-absorbing protective device of soft composite air curtain with underwater demolition |
-
2010
- 2010-12-27 CN CN2010106070692A patent/CN102042787A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6289816B1 (en) * | 1999-11-08 | 2001-09-18 | The United States Of America As Represented By The Secretary Of The Navy | Water-based apparatus to mitigate damage and injuries from a fully or partially confined explosion |
| CN101625221A (en) * | 2008-07-08 | 2010-01-13 | 张雷 | Dust-removing, splash-preventing, shock-absorbing and noise-eliminating system for directional blasting |
| CN202024695U (en) * | 2010-12-27 | 2011-11-02 | 浙江大学 | Shock-absorbing protective device of soft composite air curtain with underwater demolition |
Non-Patent Citations (1)
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| 樊自建等: "水中空气隔层对冲击波传播衰减作用的初步探讨", 《工程爆破》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358396A (en) * | 2011-06-16 | 2012-02-22 | 哈尔滨工程大学 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
| CN102358396B (en) * | 2011-06-16 | 2013-10-30 | 哈尔滨工程大学 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
| CN106679523A (en) * | 2016-12-29 | 2017-05-17 | 武汉大学 | Air buffer device used for eliminating underwater near-distance explosion shock waves |
| CN106679523B (en) * | 2016-12-29 | 2017-12-26 | 武汉大学 | A kind of air buffer device for being used to eliminate underwater close-in blasting shock wave |
| CN108760324A (en) * | 2018-06-13 | 2018-11-06 | 中航工程集成设备有限公司 | A kind of wave absorber of solid propellant rocket underwater test |
| CN108760324B (en) * | 2018-06-13 | 2020-09-01 | 中航工程集成设备有限公司 | Wave absorbing device for underwater test of solid rocket engine |
| CN110274527A (en) * | 2019-06-26 | 2019-09-24 | 湖南省航务工程有限公司 | A kind of delaying blasting device that underwater demolition security performance is high |
| CN110274527B (en) * | 2019-06-26 | 2022-05-27 | 湖南省航务工程有限公司 | Delay blasting device that underwater blasting security performance is high |
| CN111795625A (en) * | 2020-07-27 | 2020-10-20 | 武汉大学 | Method and device for protecting shock waves in water of blasting excavation of seabed foundation pit |
| CN112082441A (en) * | 2020-09-30 | 2020-12-15 | 广西新港湾工程有限公司 | Underwater blasting shock wave blocking device |
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Application publication date: 20110504 |