CN110004841B - Urban bridge dismantling device and construction method - Google Patents
Urban bridge dismantling device and construction method Download PDFInfo
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- CN110004841B CN110004841B CN201910345645.1A CN201910345645A CN110004841B CN 110004841 B CN110004841 B CN 110004841B CN 201910345645 A CN201910345645 A CN 201910345645A CN 110004841 B CN110004841 B CN 110004841B
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 239000000428 dust Substances 0.000 claims abstract description 50
- 239000002360 explosive Substances 0.000 claims abstract description 32
- 238000005422 blasting Methods 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000002341 toxic gas Substances 0.000 claims abstract description 15
- 239000007779 soft material Substances 0.000 claims abstract description 8
- 239000002775 capsule Substances 0.000 claims description 16
- 238000004880 explosion Methods 0.000 claims description 16
- 238000005474 detonation Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 7
- 238000001467 acupuncture Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
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- 238000001764 infiltration Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- F42D3/02—Particular applications of blasting techniques for demolition of tall structures, e.g. chimney stacks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
Abstract
The invention relates to the technical field of bridge demolition, in particular to a demolition device and a construction method for an urban bridge. The invention provides a device for dismantling an urban bridge, wherein third detonating tubes are uniformly embedded in the exposed part of a foundation, a plurality of first detonating tubes are embedded in a pier, the third detonating tubes are arranged below a bridge deck, dust falling device bodies are arranged on the upper surfaces of the foundation and the bridge deck and on the outer side surfaces of the pier, the bridge and the foundation, each dust falling device comprises an outer bag body made of a soft material, an outer bag cavity in the outer bag body is filled with first liquid, an inner bag body is arranged in the outer bag cavity, a second liquid is filled in the inner bag cavity, an explosive ball body detonated by a detonator is arranged in the inner bag body, a combustion part is arranged on the outer side of the cavity, a needling body is arranged on a shell, a bottom plate is arranged on the outer side of a base, and an adhesive body. The device and the construction method provided by the invention have the advantages of simple structure and convenience in construction, and can effectively reduce dust and toxic gas generated by blasting demolition, and meet the requirement of environmental protection during demolition.
Description
Technical Field
The invention relates to the technical field of bridge demolition construction, in particular to a demolition device and a construction method for an urban bridge.
Background
Blasting demolition of a beam bridge is a common demolition construction scheme in the prior art at present, and is particularly suitable for demolition engineering construction in cities. The drilling blasting is a measure that the impact action of the detonation wave peak pressure on a medium can be relieved by selecting proper explosive varieties and reasonable charging structures and the like during blasting control by utilizing a buffering principle, so that the explosive energy is reasonably distributed and utilized, and the harmful effects of excessive crushing and blasting are reduced. The buffering principle is that the time of explosive blasting pressure acting on the hole wall is prolonged by some technical means, so that the pressure in a blast hole is reduced, and various adverse factors are overcome.
Drilling and blasting are one of the demolition construction methods of urban bridges. However, when demolishing by blasting, a large amount of dust and harmful substances are generated, which causes pollution to the surrounding environment and causes a problem of environmental pollution.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for demolishing an urban bridge.
In order to achieve the purpose, the invention provides a device for dismantling an urban bridge, which comprises a pier arranged on a bridge foundation, wherein the pier is provided with a bridge, the bridge is provided with a bridge deck, a plurality of second detonating tubes are arranged below the bridge deck, a plurality of third detonating tubes are uniformly embedded in the exposed part of the bridge deck, a plurality of first detonating tubes are uniformly embedded in the side surface of the pier, a plurality of dust-settling device bodies are uniformly arranged on the upper surfaces of the bridge deck and the foundation and the outer side surfaces of the pier, the bridge and the foundation, the dust-settling device comprises a plurality of outer bag bodies which are connected with each other through an outer connecting body and are made of soft materials, an outer bag cavity in each outer bag body is filled with first liquid for dust settling, openings and main valves are arranged on the outer bag bodies for replenishing and releasing the first liquid, an inner bag body made of the soft materials is arranged in the outer bag body, the inner bag body is fixedly connected with the inner wall of the inner bag body through an inner connecting body, second liquid for dust fall and dust collection is filled in the inner bag cavity, each explosive ball detonated through a detonator is arranged inside the inner bag body, a cavity made of hard materials is arranged at the bottom of the outer bag body, a controller used for controlling combustion of a combustion part in the inner cavity is arranged on the outer side of the cavity, a needling body is arranged at the top of the combustion part shell, needling is arranged at the end of the needling body, needling is used for penetrating through the outer bag body, the needling body is sleeved on the guide column, an igniter is arranged at the bottom of the combustion part shell, the guide column is fixedly connected with the center of the base, a bottom plate is arranged on the outer side of the base, and a bonding body is arranged on the.
According to the preferable technical scheme, the first detonating tube is arranged inside a second side bag filled with second liquid, a second valve is arranged on the outer side of the second side bag and used for supplementing and releasing the second liquid, a second electrode electrically connected with the outside is arranged at the extending end of the first detonating tube, and the second electrode is used for detonating explosive in the first detonating tube.
According to the preferable technical scheme, the bottom of the outer bag body is provided with grooves, and the positions of the grooves correspond to the positions of acupuncture.
According to the preferable technical scheme, the second detonating tube is arranged inside a vertical bag filled with second liquid, a vertical electrode electrically connected with the outside is arranged at the extending end of the second detonating tube and used for detonating explosive in the second detonating tube, a vertical bag valve is arranged at the end part of the vertical bag, and a plurality of ribs which are uniformly arranged are arranged on the outer side of the vertical bag.
The preferred technical scheme, every first detonator sets up in the second blind hole, the upside of second blind hole is equipped with dust fall portion, dust fall portion includes the first blind hole that sets up at second blind hole upside, be provided with first side utricule in the first blind hole, the tip of first side utricule is equipped with first valve, sets up to be full of the second liquid in the first side utricule of inside, the portion of exploding that first side utricule bottom was equipped with is used for being connected its controller electricity that detonates with the outside.
According to the preferable technical scheme, the ratio of the volume of the first side bag body to the volume of the second side bag body ranges from 2 to 4: 1.
according to the preferable technical scheme, the ratio of the volume of the outer sac cavity to the total volume of the inner sac cavity ranges from 2 to 3: 1.
the invention also provides a construction method of the urban bridge dismantling device, which comprises the following steps:
step 1) making barriers and arranging warning areas around a bridge to be crushed and dismantled so as to ensure construction safety;
step 2) performing construction setting according to the set blasting network and sequence, respectively performing blind hole drilling construction on the upper surface of a foundation of the bridge to be dismantled, the side surface of a pier, the side surface of the bridge and concrete below a bridge deck, and respectively inserting a first detonating tube, a second detonating tube and a third detonating tube into the drilled blind holes;
step 3) uniformly bonding and fixing the bonding body outside the bottom plate of the dust falling device in the hollow and shriveled state with the exposed surface of the foundation, each side surface of the pier, each side surface of the bridge and the upper surface of the bridge plate according to the set position and sequence;
step 4) opening the opening on the outer bag body in the step 3), injecting second liquid into each inner bag cavity one by one through a valve on each inner bag body until the inner bag body is filled with the second liquid, closing the opening of the outer bag body, and injecting first liquid into the outer bag cavity through a main valve until the outer bag body is filled with the second liquid;
step 5) after the check circuit is firmly connected with the controller, evacuating field constructors, starting the controller by using an external control device, igniting a combustion part in the inner cavity by using an igniter, ejecting the acupuncture needles out by the combustion of the combustion part and penetrating through the grooves on the outer bag body, enabling first liquid in the outer bag body to flow out, and gradually flowing out the first liquid to pre-infiltrate the surfaces of the foundation, the bridge pier, the bridge and the bridge slab;
step 6) after a period of time, starting a master controller by using an external control device, electrifying the second electrode, the vertically arranged electrode and the electrode in the third detonating tube by the controller, simultaneously detonating the explosive in the first detonating tube, the explosive in the second detonating tube, the explosive in the third detonating tube and the detonator in the explosive sphere to generate instantaneous explosion, crushing the concrete of the bridge by shock waves generated by the explosion, and simultaneously adsorbing toxic gas and dust generated by the explosion by second liquid filled in the inner bag body, the vertical bag and the second side bag;
and 7) after blasting is finished, cleaning broken bridge concrete construction waste.
According to the preferable technical scheme, in the step 2) of the construction method, a blind hole is drilled on the upper side of the first detonating tube, a dust falling part is arranged, in the step 6), an explosion part in the dust falling part is simultaneously exploded with the first detonating tube, the second detonating tube and the third detonating tube, and the second liquid filled in the first side bag cavity absorbs toxic gas and dust generated after explosion to reduce dust.
In a preferred technical scheme, the first liquid and/or the second liquid is water or a mixture of water, glue and a foaming agent.
Compared with the prior art, the invention has the following beneficial effects:
1. the urban bridge demolition device provided by the invention has the advantages that the structure is simple, the construction is convenient, the dust and toxic gas generated by blasting demolition can be effectively reduced, and the requirement of environmental protection can be met after blasting;
2. the construction method provided by the invention has the advantages of obvious and controllable blasting demolition construction effect, faster construction and short period.
Drawings
Fig. 1 is an overall structural view of a demolition apparatus of an urban bridge according to the present invention;
FIG. 2 is an internal structure view of the dust settling device of FIG. 1;
FIG. 3 is an enlarged view of the structure at point B in FIG. 1;
fig. 4 is an internal view of the dustfall portion in fig. 3;
fig. 5 is an internal structural view of the first detonator in fig. 3;
FIG. 6 is an enlarged view of A in FIG. 1;
fig. 7 is an inner structural view of the second explosion damper of fig. 1;
fig. 8 is an enlarged view of a portion of the structure at point C in fig. 1.
Reference numerals
In the figure, 1 — base; 2-dust settling device, 20-detonator, 21-outer bag body, 22-inner connecting body, 23-explosive ball, 24-main valve, 25-outer bag cavity, 26-inner bag cavity, 27-outer connecting body, 28-needling, 29-needling body, 210-inner cavity, 211-base, 212-groove, 213-igniter, 214-guide column, 215-combustion part (gunpowder), 216-base plate (bonding body, glue layer), 217-cavity, 218-controller, 219-inner bag body, 220-fixing part; 3-bridge pier, 31-first blind hole, 32-second blind hole, 33-second opening, and 34-first opening; 4, a bridge; 5-bridge plate; 6-dust settling part, 61-first side bag cavity, 62-explosion part, 63-first side bag body and 64-first valve; 7-a first detonating tube, 71-a second electrode, 72-a second side bag, 73-a second valve; 8-a second detonating tube, 81-a vertically arranged electrode, 82-a vertical capsule, 83-a vertical capsule valve, 84-a rib; 9-third detonating tube.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1-8, in the demolition device for an urban bridge provided by the invention, a bridge to be demolished is a steel-concrete structure, and the demolition device comprises a pier 3 arranged on a bridge foundation 1, a bridge 4 is arranged on the pier 3, a bridge deck 5 is arranged on the bridge 4, a plurality of second detonating tubes 8 which are uniformly arranged are arranged below the bridge deck 5, a plurality of third detonating tubes 9 are uniformly embedded on an exposed part of the foundation 1, the length and the dosage of the third detonating tubes 9 are increased along with the increase of the general thickness of the foundation 1, a plurality of first detonating tubes 7 are uniformly embedded on the side surface of the pier 3, and a plurality of dust settling devices 2 which are uniformly arranged are arranged on the upper surfaces of the foundation 1 and the bridge deck 5 and on the outer side surfaces of the pier 3, the bridge 4 and the foundation 1.
As shown in fig. 2, the dust falling device 2 includes a plurality of outer bag bodies 21 made of soft material, which are connected to each other by an external connector 27, the soft material is rubber or plastic material, and can be filled with liquid after being sealed, and the liquid can be water. Wherein, be equipped with on every outer utricule 21 and can seal and open at any time and the opening of closing, the opening that sets up can be more convenient pours into first liquid or second liquid into for interior utricule 219, and the inside outer bag chamber 25 of every outer utricule 21 is full of the first liquid that is used for the dust fall. Wherein, the outer bag body 21 is provided with a main valve 24, the main valve 24 is selected as a closed valve, and the main valve 24 plays a role of conveniently injecting the first liquid. Wherein, the outer bag cavity 25 is internally provided with an inner bag body 219, the inner bag body 219 is also provided with a valve, and the valve can also be used for conveniently injecting the second liquid. Wherein, the inner bag body 219 is fixedly connected with the inner wall thereof through the inner connecting body 22, the inner bag body 219 is prevented from moving, and the inner bag cavity 26 is filled with the first liquid or the second liquid for dust fall and dust collection. In this embodiment, the first liquid is water, the second liquid is water or a mixture of water, glue and a foaming agent, wherein the mixture comprises the following components in percentage by weight: glue water: the ratio of the liquid detergent is 3: 2: 2, 5% of glycerol can be added, and the glycerol plays a role in promoting more bubbles to be generated. In the preferred structure of this embodiment, an explosive ball 23 detonated by a detonator 20 is disposed inside each inner bag cavity 26, the detonator 20 is electrically connected to an external controller, a cavity 217 made of hard material is disposed at the bottom of the outer bag body 21, a controller 218 for controlling the combustion of the combustion part 215 in the inner cavity 210 is disposed outside the cavity 217, and a needling body 29 is disposed at the top of the casing of the combustion part 215. In this embodiment, the burning portion 215 is made of black powder or a mixture of black powder and potassium chlorate, the end of the needle body 29 is provided with the needle 28 for penetrating the outer capsule 21, the needle body 29 is sleeved on the guide column 214, the bottom of the shell of the burning portion 215 is provided with the igniter 213, the guide column 214 is fixedly connected with the center of the base 211, after the black powder or the mixture of the black powder and the potassium chlorate is ignited by the igniter 213, the energy generated by burning can enable the needle body 29 to move upwards and drive the needle 28 to move upwards to puncture the outer capsule 21, so that the first liquid in the outer capsule cavity 25 flows out, and the pre-infiltration before explosion of the component of the bridge to be disassembled is realized, and the dustproof and dust-reducing effects are achieved. In a preferred technical scheme, grooves 212 are formed in the bottom of the outer capsule body 21, the position of each groove 212 corresponds to that of the acupuncture 28, and the arrangement of the grooves plays a role in enabling the outer capsule body 21 to be easily punctured. Wherein, the outer side of the base 211 is preferably provided with a bottom plate 216, and the outer side of the bottom plate 216 is provided with a bonding body, which may be a double-sided adhesive tape, and the double-sided adhesive tape can be used to fixedly connect the outer bag body 21 with the surface of the bridge member to be dismantled. According to the preferable technical scheme, the ratio of the volume of the outer sac cavity 25 to the total volume of the inner sac cavity 26 is in the range of 2-3: 1. the number of the inner bladder cavities 26 can be set by calculating the thickness and the volume of the bridge belt dismantling beam. In this embodiment, the number of the inner bladder cavities 26 is 3, and the ratio of the volume of the outer bladder cavity 25 to the total volume of the inner bladder cavity 26 is 2: 1, after the explosive spheroid 23 in inner bag chamber 26 explodes, the second liquid can be exploded into the vaporific or the rain form that splashes, wherein still can produce a large amount of bubbles simultaneously, because the surface area of bubble is big than the surface area of water droplet, can exert better absorption dust fall effect to the dust and the poison gas that cause the raise after being blasted.
As shown in fig. 3 and 5, in the present embodiment, the first squib 7 preferably has a structure in which: the first detonating tube 7 is arranged in the second side bag 72 filled with the second liquid, the second side bag 72 is made of soft material, the second valve 73 is arranged on the outer side of the second side bag 72 and used for injecting and releasing the second liquid, the extending end of the first detonating tube 7 is provided with a second electrode 71 electrically connected with the outside, and the second electrode 71 is used for detonating the explosive in the first detonating tube 7 after being electrified.
As shown in figures 6 and 8, in the preferred technical scheme, the second detonating tube 8 is arranged in a vertical bag 82 filled with the second liquid, a vertical electrode 81 electrically connected with the outside is arranged at the extending end of the second detonating tube 8 and used for detonating the explosive in the second detonating tube 8, and a vertical bag valve 83 is arranged at the end part of the vertical bag 82. According to the preferable technical scheme, a plurality of ribs 84 which are uniformly arranged are arranged on the outer side of the vertical bag 82, when the vertical bag 82 is inserted into a blind hole of concrete below the bridge plate 5, the vertical bag valve 83 is opened, the vertical bag 82 is inflated after the second liquid is filled into the vertical bag 82, and the ribs 84 have the function of better fixing the vertical bag and the bridge plate 5.
In this embodiment, in a preferable technical solution, a ratio of the volume of the first side bladder 63 to the volume of the second side bladder 72 ranges from 2 to 4: 1. wherein, the ratio of the volume of the first side bag body 63 to the volume of the second side bag body 72 is preferably 2: 1,3: 1 or 4: 1.
the invention also provides a construction method of the urban bridge dismantling device, which comprises the following steps:
step 1) making barriers and arranging warning areas around a bridge to be crushed and dismantled so as to ensure construction safety;
step 2) performing construction setting according to the set blasting network and sequence, respectively performing blind hole drilling construction on the upper surface of the foundation 1 of the bridge to be dismantled, the side surface of the pier 3, the side surface of the bridge 4 and concrete below the bridge slab 5, and respectively inserting a first detonating tube 7, a second detonating tube 8 and a third detonating tube 9 into the drilled blind holes;
step 3) uniformly bonding and fixing the bonding body outside the bottom plate 216 of the dust falling device 2 in the hollow state with the exposed surface of the foundation 1, each side surface of the pier 3, the side surface of the bridge 4 and the upper surface of the bridge plate 5 firmly according to the set positions and sequence;
step 4) opening the opening on the outer bag body 21 in the step 3), injecting second liquid into each inner bag cavity 26 one by one through a valve on each inner bag body 219 until the inner bag cavity is filled, then closing the opening of the outer bag body 21, and injecting first liquid into the outer bag cavity 25 through a main valve 24 until the outer bag cavity is filled;
step 5) after the circuit and the controller are firmly connected, evacuating field constructors, starting the controller 218 by using an external control device, enabling the igniter 213 to ignite the combustion part 215 in the inner cavity 210, ejecting the acupuncture 28 out of the combustion part 215 and penetrating through the groove 212 on the outer capsule 21, enabling the first liquid in the outer capsule 25 to flow out, and gradually flowing out the first liquid to pre-soak the surfaces of the foundation 1, the pier 3, the bridge 4 and the bridge plate 5;
step 6) after a period of time, in this embodiment, after the first liquid in the outer bag cavity 25 completely flows out, and after a period of time of 20 to 30 seconds, the first liquid completely infiltrates the foundation 1, the pier 3, the bridge 4 and the bridge deck 5, then the external control device is used to start the master controller, the controller 218 energizes the electrodes in the second electrode 71, the vertical electrode 81 and the third detonating tube 9, and after the energization, the explosive in the first detonating tube 7, the explosive in the second detonating tube 8, the explosive in the third detonating tube 9 and the detonator 20 in the explosive sphere 23 are simultaneously detonated, and due to instant explosion, the shock wave generated by the explosion destroys the concrete of the bridge to achieve the purpose of dismantling, wherein the second liquid filled in the inner bag 219, the vertical bag 82 and the second side bag 72 is changed into a mist or rain shape, and a large amount of bubbles are generated, the bubbles can better perform the adsorption function on the dust and toxic gas raised by the blasting, so that the toxic gas and dust generated by the blasting can be comprehensively adsorbed, and the aim of dust fall is fulfilled;
and 7) after blasting is finished, cleaning broken bridge concrete construction waste.
Example 2
This example is further improved on the basis of example 1, with the difference that: as shown in fig. 3 and 4, in the urban bridge demolition apparatus provided in this embodiment, a preferred technical solution is that the first detonation tube 7 is disposed in the second blind hole 32, the first blind hole 31 is disposed on the upper side of the second blind hole 32, the dust falling portion 6 is disposed in the first blind hole 31, the dust falling portion 6 specifically includes a first side bag body 63 made of a soft material, a first valve 64 is disposed at an end of the first side bag body 63, the first side bag cavity 61 is filled with the second liquid, an explosive portion 62 is disposed at the bottom of the first side bag body 63, the explosive portion 62 is electrically connected to an external controller for igniting the first side bag body, the explosive portion 62 is of a semicircular structure, and when the explosive portion 62 is energized, the explosive portion is detonated to shatter the first side bag body 63, the second liquid is exploded into a splashed rain or mist shape, and a large amount of bubbles are generated.
In the construction method of the urban bridge demolition apparatus according to the present embodiment, in step 2) of the construction method, since the dust fall portion 6 is drilled and provided above the first detonation tube 7, in step 6) of the construction method, the explosion portion 62 in the dust fall portion 6 can explode simultaneously with the first detonation tube 7, the second detonation tube 8, and the third detonation tube 9, and since the dust fall portion 6 and the first detonation tube 7 are provided separately, the adsorption of the toxic gas and dust generated after the first detonation tube 7 is exploded by the second liquid in the first side bag chamber 61 is slightly delayed, so that the adsorption effect of the generated toxic gas and dust is more remarkable. In addition, as the second liquid also contains the components of the glue, the mixed liquid mixed with the glue components is not easy to volatilize, and is easier to play an adsorption role in dust and toxic gas generated after explosion. Furthermore, in the present embodiment, the ratio of the volume of the first side bladder 63 to the volume of the second side bladder 72 is selected from 3: 1, the second liquid in first side bag chamber 61 is 3 times of the second liquid in second side bag 72, because the second liquid volume in first side bag chamber 61 is great, the bubble of production is also more, when blasting pier 3 that major structure is big, the adsorption effect to the poison gas of production, dust goes on can be more obvious, the dust and the poison gas volume of production can obviously reduce, can full play to the adsorption of dust and poison gas and the effect of dust fall attenuation.
The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.
Claims (10)
1. The utility model provides a device demolishs of city bridge, includes pier (3) of setting on bridge foundation (1), be equipped with bridge (4) on pier (3), be equipped with bridge plate (5) on bridge (4), its characterized in that, be equipped with a plurality of second detonator (8) below bridge plate (5), the part that basis (1) exposes evenly buries a plurality of third detonator (9) underground, the side of pier (3) evenly buries a plurality of first detonator (7) underground, the upper surface of basis (1) and bridge plate (5) and the lateral surface of pier (3), bridge (4) and basis (1) all are equipped with a plurality of dust fall device body (2) of evenly arranging, dust fall device (2) include a plurality of outer utricule (21) of making by the software material that connect each other through outer connector (27), every outer utricule (25) inside outer utricule (21) are full of the first liquid that is used for dust fall, the outer bag body (21) is provided with an opening and a main valve (24) for supplementing and releasing a first liquid, an inner bag body (219) made of a soft material is arranged in an outer bag cavity (25), the inner bag body (219) is fixedly connected with the inner wall of the inner bag body through an inner connecting body (22), a second liquid for dust fall and dust collection is filled in an inner bag cavity (26) of the inner bag body (219), an explosive ball (23) detonated through a detonator (20) is arranged in each inner bag body (219), the bottom of the outer bag body (21) is provided with a cavity (217) made of a hard material, the outer side of the cavity (217) is provided with a controller (218) for controlling combustion of a combustion part (215) in an inner cavity (210), the top of a shell of the combustion part (215) is provided with a needling body (29), the end part of the needling body (29) is provided with a needling body (28) for penetrating through the outer bag body (21), acupuncture body (29) suit is on guide post (214), the bottom of combustion portion (215) casing is equipped with some firearm (213), the center fixed connection of guide post (214) and base (211), the outside of base (211) is equipped with bottom plate (216), the outside of bottom plate (216) is equipped with the bonding body.
2. The urban bridge demolition device according to claim 1, wherein the first detonation tube (7) is arranged inside a second side bag (72) filled with a second liquid, a second valve (73) is arranged on the outer side of the second side bag (72) and used for supplementing and releasing the second liquid, a second electrode (71) electrically connected with the outside is arranged at the extending end of the first detonation tube (7), and the second electrode (71) is used for detonating explosive in the first detonation tube (7).
3. The urban bridge demolition unit according to claim 1, wherein the bottom of the outer bladder (21) is provided with grooves (212), each groove (212) being positioned in correspondence of a needle (28).
4. The urban bridge demolition device according to claim 1, wherein the second detonation tube (8) is arranged inside a vertical bag (82) filled with a second liquid, a vertical electrode (81) electrically connected with the outside is arranged at the extending end of the second detonation tube (8), the vertical electrode (81) is used for detonating explosives in the second detonation tube (8), a vertical bag valve (83) is arranged at the end part of the vertical bag (82), and a plurality of ribs (84) which are uniformly arranged are arranged on the outer side of the vertical bag (82).
5. The urban bridge demolition device according to claim 1, wherein each first detonating tube (7) is arranged in a second blind hole (32), a dust-settling portion (6) is arranged on the upper side of the second blind hole (32), the dust-settling portion (6) comprises a first blind hole (31) arranged on the upper side of the second blind hole (32), a first side bag body (63) is arranged in the first blind hole (31), a first valve (64) is arranged at the end of the first side bag body (63), a first side bag cavity (61) arranged inside is filled with a second liquid, and an explosion portion (62) arranged at the bottom of the first side bag body (63) is electrically connected with an external controller for detonating the first side bag body.
6. The urban bridge demolition device according to claim 5, wherein the ratio of the volume of the first side bladder (63) to the volume of the second side bladder (72) ranges from 2 to 4: 1.
7. the urban bridge demolition device according to claim 1, wherein the ratio of the volume of the outer bladder cavity (25) to the total volume of the inner bladder cavity (26) ranges from 2 to 3: 1.
8. the construction method of the urban bridge demolition apparatus according to any one of claims 1 to 7, wherein the construction method comprises:
step 1) making barriers around a bridge to be dismantled and setting a warning area to ensure construction safety;
step 2) performing construction setting according to the set blasting network and sequence, respectively drilling blind holes on the upper surface of a foundation (1) of the bridge to be dismantled, the side surface of a pier (3), the side surface of a bridge (4) and concrete below a bridge plate (5), and respectively inserting a first detonating tube (7), a second detonating tube (8) and a third detonating tube (9) into the drilled blind holes;
step 3), uniformly bonding and fixing bonding bodies on the outer side of a bottom base plate (216) of the dust falling device (2) in a hollow and flat state with the exposed surface of the foundation (1), all side surfaces of the pier (3), the side surfaces of the bridge (4) and the upper surface of the bridge plate (5) according to the set positions and the sequence;
step 4) opening the opening of the outer capsule body (21) in the step 3), injecting second liquid into each inner capsule cavity (26) one by one through a valve on each inner capsule body (219) until the inner capsule cavity is filled with the second liquid, closing the opening of the outer capsule body (21), and injecting first liquid into the outer capsule cavity (25) through a main valve (24) until the outer capsule cavity is filled with the second liquid;
step 5) after the circuit and the controller are firmly connected, evacuating field constructors, starting the controller (218) by using an external control device, igniting a combustion part (215) in the inner cavity (210) by using an igniter (213), ejecting the acupuncture (28) by the combustion of the combustion part (215) and penetrating through a groove (212) on the outer bag body (21), so that the first liquid in the outer bag cavity (25) flows out, and the first liquid flows out step by step to pre-infiltrate the surfaces of the foundation (1), the bridge pier (3), the bridge (4) and the bridge slab (5);
step 6), after a period of time, starting a master controller by using an external control device, electrifying electrodes in a second electrode (71), a vertical electrode (81) and a third detonating tube (9) by using the controller (218), simultaneously detonating explosive in a first detonating tube (7), explosive in a second detonating tube (8), explosive in a third detonating tube (9) and a detonator (20) in a detonating sphere (23), generating instant explosion, crushing concrete of the bridge by using shock waves generated by the explosion, and simultaneously adsorbing toxic gas and dust generated by the explosion by using second liquid filled in an inner bag body (219), a vertical bag (82) and a second side bag (72);
and 7) after blasting is finished, cleaning broken bridge concrete construction waste.
9. The construction method of the urban bridge demolition apparatus according to claim 8, wherein in step 2) of the construction method, a first blind hole is drilled on an upper side of the first detonating tube (7), the dust-settling portion (6) is provided in the blind hole, in step 6), the explosive portion (62) in the dust-settling portion (6) is detonated simultaneously with the first detonating tube (7), the second detonating tube (8), and the third detonating tube (9), and the first side bag chamber (61) is filled with the second liquid to adsorb and settle dust and toxic gas generated after blasting.
10. The method for constructing a demolition unit for urban bridges according to claim 8, wherein the first liquid and/or the second liquid is water or a mixture of water, glue, foaming agent.
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| CN110645856B (en) * | 2019-11-07 | 2021-09-10 | 江西荣达爆破新技术开发有限公司 | Blasting method for bridge demolition |
| CN113235469A (en) * | 2021-05-24 | 2021-08-10 | 中铁建大桥工程局集团第五工程有限公司 | Sectional blasting demolition method for large bridge |
| CN115045459B (en) * | 2022-07-12 | 2023-10-24 | 河北大河钢构科技有限公司 | Building decoration ceramic tile, paving and dismantling method |
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