CN105973082B - The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch - Google Patents
The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch Download PDFInfo
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- CN105973082B CN105973082B CN201610392625.6A CN201610392625A CN105973082B CN 105973082 B CN105973082 B CN 105973082B CN 201610392625 A CN201610392625 A CN 201610392625A CN 105973082 B CN105973082 B CN 105973082B
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- curved pipe
- reinforced concrete
- pipe
- concrete brace
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Classifications
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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
-
- 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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- Working Measures On Existing Buildindgs (AREA)
Abstract
The present invention relates to a kind of bore distribution method of reinforced concrete brace demolition blasting in foundation ditch.Its technical scheme is：The reinforced concrete brace in the foundation ditch（3）Curved pipe group is inside embedded with along the longitudinal direction（1）, curved pipe group（1）In curved pipe be 1 or 3, the two ends mouth of pipe of every curved pipe upwards, air line distance L=1800 ~ 2300mm between the mouth of pipe of two ends, curved pipe group（1）In every curved pipe same end pipe mouthful the line of centres perpendicular to reinforced concrete brace（3）Long side.In curved pipe group（1）Between also pre-buried 2 straight tubes of middle position（2）, every straight tube（2）Perpendicular to reinforced concrete brace（3）Upper plane, every straight tube（2）The upper end mouth of pipe is equal with the distance for the curved pipe upper end mouth of pipe that both sides are neighbouring.The present invention has easy construction, short time limit, cost is low, the characteristics of can improve the security reliability of demolition blasting and can strengthen demolition blasting effect.
Description
Technical field
The invention belongs to the cloth hole technical field of reinforced concrete brace demolition blasting.More particularly to steel in a kind of foundation ditch
The bore distribution method of reinforced concrete support beam demolition blasting.
Background technology
With the development of building construction technology, various large deep foundation pits increase therewith, reinforced concrete brace in foundation ditch
Dismounting amount gradually increases.Method for dismounting used at present mainly has：Demolition blasting method, mechanical removal method and artificial chisel division.
Compared to latter two method for dismounting, demolition blasting method have remove short time limit, slagging tap fast, recyclable waste steel bar and economizes on resources
The characteristics of, therefore be most widely used at present when reinforced concrete brace is removed.
Demolition blasting method is prefabricated vertical to blasthole typically during casting reinforced concrete support beam, will when to be removed
Explosive buries the prefabricated vertical into blasthole of reinforced concrete brace, is removed by the method for explosion and crushing.This edge
The method that reinforced concrete brace longitudinal direction is vertically arranged blasthole successively adds the work of prefabricated blasthole number and cloth hole
Measure, generally cause construction period extension, demolition blasting high expensive；And due to reinforced concrete brace sectional dimension factor
So that blast hole depth is restricted, often result in that single hole explosive charge is less than normal or stem length is not enough, cause armored concrete
Support beam explosion and crushing not enough fully or rushes the generation of big gun event, and increase mechanical secondary is broken and removes cost.
The content of the invention
It is contemplated that overcoming prior art defect.Purpose is to provide that a kind of easy construction, short time limit, cost be low, energy
Reinforced concrete brace demolition blasting in the security reliability for improving demolition blasting and the foundation ditch that demolition blasting effect can be strengthened
Bore distribution method.
To realize above-mentioned task, the technical solution adopted by the present invention is：Before reinforced concrete brace is poured in foundation ditch,
It is embedded with every curved pipe institute in curved pipe group, curved pipe group in the foundation ditch in reinforced concrete brace along the longitudinal direction
The plane of composition is each parallel to reinforced concrete brace side, and the two ends mouth of pipe of every curved pipe is upward, the two ends mouth of pipe
Between air line distance L=1800~2300mm；The line of centres horizontal line of the same end pipe mouthful of every curved pipe in curved pipe group hangs down
Directly in the long side of reinforced concrete brace.
Between curved pipe group apart from r=0.38H~0.42H.
Middle position between curved pipe group is embedded with 2 straight tubes, and every straight tube is perpendicular to reinforced concrete brace
Upper plane, the every straight tube upper end mouth of pipe is equal with the distance for the curved pipe upper end mouth of pipe that both sides are neighbouring, the upper pipes of every straight tube
Mouth is concordant with the two ends mouth of pipe of curved pipe group, is higher by 40~60mm of plane on reinforced concrete brace.
The pre-buried number of the curved pipe group is：A) when the width R of reinforced concrete brace is less than 700mm, curved pipe
It is single arrangement in reinforced concrete brace；B) when the width R of reinforced concrete brace is more than or equal to 700mm,
Curved pipe is 3 arrangements in reinforced concrete brace, the curved pipe mouth of pipe spacing a=0.35R of medial arc pipe both sides~
0.4R。
The radius of curvature ρ of medial arc pipe when the curved pipe group is 3 arrangements1
The radius of curvature ρ of both sides curved pipe when the curved pipe group is 3 arrangements or curved pipe when being single arrangement2
In formula (I) and formula (II)：L represents the air line distance between the mouth of pipe of curved pipe two ends, mm；
H represents the height of reinforced concrete brace, mm.
Curved pipe material in the curved pipe group is PVC, and the aperture of every curved pipe is 40~50mm.
The lower port of the straight tube is 2H/9~3H/9 with the distance of reinforced concrete brace lower surface；The straight tube
Material is PVC, and the aperture of straight tube is 40~50mm.
Due to using above-mentioned technical proposal, the present invention has following good effect compared with prior art：
The present invention is embedded with difference before reinforced concrete brace 3 is poured along the longitudinal direction of reinforced concrete brace 3
The curved pipe group 1 of radius of curvature, is provided between the curved pipe of adjacent curved pipe group 1 and is put down on reinforced concrete brace 3
The horizontal straight tube 2 in face, the curved pipe group 1 and straight tube 2 are prefabricated blasthole.The collaboration of this pre-buried curved pipe group 1 and straight tube 2
Arrangement form causes the energy in each prefabricated blasthole after explosive charge to intercouple, and makes in the reinforced concrete brace 3
Explosive load distribution is more uniform, can be prevented effectively from the entity excessively crushing of reinforced concrete brace 3 or crush insufficient etc.
Situation occurs.And the curved pipe for burying different curvature radius along support beam longitudinal direction can be greatly decreased vertical buried to blasthole and count
Amount, reduces construction cost, the features such as shortening the construction period and can strengthen demolition blasting effect.
The blasthole pre-buried number and prefabricated blasthole of the demolition blasting of reinforced concrete brace 3 can be greatly reduced in the present invention
Material cost；It can be prevented effectively from and rush big gun event occurrence rate, reduce the security threat to surrounding enviroment；So that armored concrete branch
Support the explosion and crushing of beam 3 fully, can effectively shorten the demolition blasting construction period, increase economic efficiency.The present invention is applicable not only to base
The demolition blasting of reinforced concrete brace, also can be widely used to the explosions such as frame construction building, factory building and overpass in hole
Projects.
Therefore, the present invention has easy construction, short time limit, cost is low, can improve the security reliability and energy of demolition blasting
The characteristics of strengthening demolition blasting effect.
Brief description of the drawings
Fig. 1 is a kind of top view of bore distribution method of the present invention；
The diagrammatic cross-section that Fig. 2 cuts open for Fig. 1 A-A ladders.
Embodiment
The present invention is described further with reference to the accompanying drawings and detailed description, not to the limit of its protection domain
System.
Embodiment 1
The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch.Reinforcing bar is mixed in foundation ditch described in the present embodiment
Coagulating the size in the cross section of soil support beam is：Width R is 800mm；Height H is 600mm.
Bore distribution method described in the present embodiment is as depicted in figs. 1 and 2：Before reinforced concrete brace 3 is poured in foundation ditch, in institute
State and be embedded with curved pipe group 1 in foundation ditch in reinforced concrete brace 3 along the longitudinal direction, every curved pipe in curved pipe group 1
The plane constituted is parallel to the side of reinforced concrete brace 3, and the two ends mouth of pipe of every curved pipe is upward, the two ends mouth of pipe
Between air line distance L=2000mm；The same end pipe mouthful line of centres of every curved pipe in curved pipe group 1 is perpendicular to reinforced concrete
The long side of native support beam 3.
As shown in Figure 1：Between curved pipe group 1 apart from r=0.38H~0.42H
=(0.38~0.42) × 600mm
=228~252mm.
As depicted in figs. 1 and 2：Middle position between curved pipe group 1 is embedded with 2 straight tubes, and every straight tube 2 is perpendicular to steel
The upper plane of reinforced concrete support beam 3, the distance phase of the every upper end mouth of pipe of the straight tube 2 curved pipe upper end mouth of pipe neighbouring with both sides
Deng the upper end mouth of pipe of every straight tube 2 is concordant with the two ends mouth of pipe of curved pipe group 1, is higher by plane on reinforced concrete brace 3
40mm。
As shown in figure 1, the pre-buried number of the curved pipe group 1 is：Due to the width R=800mm of reinforced concrete brace 3
More than 700mm, therefore curved pipe is 3 arrangements in reinforced concrete brace 3.
As depicted in figs. 1 and 2, the curved pipe group 1 be 3 arrangement when the both sides curved pipe mouth of pipe between apart from a
A=(0.35~0.4) × R
=(0.35~0.4) × 800
=280~320mm.
As depicted in figs. 1 and 2, the radius of curvature ρ of the medial arc pipe when curved pipe group 1 is 3 arrangements1
As depicted in figs. 1 and 2, the radius of curvature ρ of the both sides curved pipe when curved pipe group 1 is 3 arrangements2
In formula (I) and formula (II)：L represents the air line distance between the mouth of pipe of curved pipe two ends, mm；
H represents the height of reinforced concrete brace 3, mm.
L=2000mm and H=600mm are substituted into formula (I) and formula (II) respectively, then
ρ1=2203mm；
ρ2=1450mm.
Curved pipe material in the curved pipe group 1 is PVC, and the aperture of every curved pipe is 40mm.
The lower port of the straight tube 2 is 2H/9~3H/9=600 (2/9 with the distance of the lower surface of reinforced concrete brace 3
~3/9)=133~200mm；The material of the straight tube 2 is PVC, and the aperture of straight tube 2 is 40mm.
Embodiment 2
The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch.Reinforcing bar is mixed in foundation ditch described in the present embodiment
Coagulating the size in the cross section of soil support beam is：Width R is 1000mm；Height H is 800mm.
Bore distribution method described in the present embodiment is as depicted in figs. 1 and 2：Before reinforced concrete brace 3 is poured in foundation ditch, in institute
State and be embedded with curved pipe group 1 in foundation ditch in reinforced concrete brace 3 along the longitudinal direction, every curved pipe in curved pipe group 1
The plane constituted is parallel to the side of reinforced concrete brace 3, and the two ends mouth of pipe of every curved pipe is upward, the two ends mouth of pipe
Between air line distance L=2300mm；The same end pipe mouthful line of centres of every curved pipe in curved pipe group 1 is perpendicular to reinforced concrete
The long side of native support beam 3.
Positioned at plane on the reinforced concrete brace 3 with the intersecting lens in corresponding cross section.
As shown in figure 1, between curved pipe group 1 apart from r=(0.38~0.42) H
=(0.38~0.42) × 800mm
=304~336mm.
As depicted in figs. 1 and 2：Middle position between curved pipe group 1 is embedded with 2 straight tubes, and every straight tube 2 is perpendicular to steel
The upper plane of reinforced concrete support beam 3, the distance phase of the every upper end mouth of pipe of the straight tube 2 curved pipe upper end mouth of pipe neighbouring with both sides
Deng the upper end mouth of pipe of every straight tube 2 is concordant with the two ends mouth of pipe of curved pipe group 1, is higher by plane on reinforced concrete brace 3
50mm。
As shown in figure 1, the pre-buried number of the curved pipe group 1 is：Due to the width R=of reinforced concrete brace 3
1000mm is more than 700mm, therefore curved pipe is 3 arrangements in reinforced concrete brace 3.
As depicted in figs. 1 and 2, the curved pipe group 1 be 3 arrangement the both sides curved pipe mouths of pipe between apart from a
A=0.35R~0.4R
=(0.35~0.4) × 1000
=350~400mm.
As depicted in figs. 1 and 2, the radius of curvature ρ of the medial arc pipe during the curved pipe group 1 is arranged for 31
As depicted in figs. 1 and 2, the radius of curvature ρ of the both sides curved pipe during the curved pipe group 1 is arranged for 32
In formula (I) and formula (II)：L represents the air line distance between the mouth of pipe of curved pipe two ends, mm；
H represents the height of reinforced concrete brace 3, mm.
L=2300mm and H=800mm are substituted into formula (I) and formula (II) respectively, then
ρ1=2226mm；
ρ2=1506mm.
Curved pipe material in the curved pipe group 1 is PVC, and the aperture of every curved pipe is 50mm.
The lower port of the straight tube 2 is 2H/9~3H/9=800 (2/9 with the distance of the lower surface of reinforced concrete brace 3
~3/9)=178~267；The material of the straight tube 2 is PVC, and the aperture of straight tube 2 is 50mm.
Embodiment 3
The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch.Reinforcing bar is mixed in foundation ditch described in the present embodiment
Coagulating the size in the cross section of soil support beam is：Width R is 600mm；Height H is 400mm.
Bore distribution method is described in the present embodiment：Before reinforced concrete brace 3 is poured in foundation ditch, the steel in the foundation ditch
It is flat that every curved pipe being embedded with along the longitudinal direction in reinforced concrete support beam 3 in curved pipe group 1, curved pipe group 1 is constituted
Face parallel to the side of the reinforced concrete brace 3, the two ends mouth of pipe of every curved pipe upwards, straight line between the mouth of pipe of two ends away from
From L=1800mm；The same end pipe mouthful line of centres of every curved pipe in curved pipe group 1 is perpendicular to reinforced concrete brace 3
Long side.
As shown in figure 1, between curved pipe group 1 apart from r=0.38H~0.42H
=(0.38~0.42) × 400mm
=152~168mm.
As shown in Figure 1：Middle position between curved pipe group 1 is embedded with 2 straight tubes, and every straight tube 2 is mixed perpendicular to reinforcing bar
The upper plane of solidifying soil support beam 3, the every upper end mouth of pipe of straight tube 2 is equal with the distance for the curved pipe upper end mouth of pipe that both sides are neighbouring, often
The upper end mouth of pipe of root straight tube 2 is concordant with the two ends mouth of pipe of curved pipe group 1, is higher by plane 60mm on reinforced concrete brace 3.
The pre-buried number of the curved pipe group 1 is：Because the width R=600 when reinforced concrete brace 3 is less than 700mm,
Then curved pipe is single arrangement in reinforced concrete brace 3.
The radius of curvature ρ of the curved pipe of the single arrangement
In formula (I)：L represents the air line distance between the mouth of pipe of curved pipe two ends, mm；
H represents the height of reinforced concrete brace 3, mm.
L=1800mm and H=400mm is substituted into formula (I), then
ρ=1652mm.
The single curved pipe material is PVC, and the aperture of every curved pipe is 40mm.
The lower port of the straight tube 2 is 2H/9~3H/9=400 apart from the distance of the lower surface of reinforced concrete brace 3
(2/9~3/9)=130；The material of the straight tube 2 is PVC, and the aperture of straight tube 2 is 40mm.
Present embodiment has following good effect compared with prior art：
Present embodiment is pre- along the longitudinal direction of reinforced concrete brace 3 before reinforced concrete brace 3 is poured
The curved pipe group 1 of different curvature radius is embedded with, is provided between the curved pipe of adjacent curved pipe group 1 perpendicular to reinforced concrete support
The horizontal straight tube 2 of plane on beam 3, the curved pipe group 1 and straight tube 2 are prefabricated blasthole.This pre-buried curved pipe group 1 and straight tube
2 cooperative arrangement form causes the energy in each prefabricated blasthole after explosive charge to intercouple, and makes the reinforced concrete support
Explosive load distribution in beam 3 is more uniform, and the entity that can be prevented effectively from reinforced concrete brace 3 is excessively crushed or crushed not
The situation such as abundant occurs.And the curved pipe for burying different curvature radius along support beam longitudinal direction can be greatly decreased vertically to blasthole
Embedded quantity, reduces construction cost, the features such as shortening the construction period and can strengthen demolition blasting effect.
The pre-buried number of blasthole of the demolition blasting of reinforced concrete brace 3 can be greatly reduced and pre- in present embodiment
The material cost of blasthole processed；It can be prevented effectively from and rush big gun event occurrence rate, reduce the security threat to surrounding enviroment；So that reinforcing bar
The explosion and crushing of concrete support beam 3 fully, can effectively shorten the demolition blasting construction period, increase economic efficiency.This specific implementation
Mode is applicable not only to the demolition blasting of reinforced concrete brace in foundation ditch, also can be widely used to frame construction building, factory
The blasting and dismantling engineering such as room and overpass.
Therefore, present embodiment have easy construction, short time limit, cost is low, the safety of demolition blasting can be improved can
The characteristics of by property with demolition blasting effect can be strengthened.
Claims (3)
1. the bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch, it is characterised in that the bore distribution method is：
Before reinforced concrete brace (3) is poured, curved pipe group is embedded with along the longitudinal direction in the reinforced concrete brace (3)
(1) side of the plane that, every curved pipe in curved pipe group (1) is constituted each parallel to the reinforced concrete brace (3)
Face, the two ends mouth of pipe of every curved pipe is upward, air line distance L=1800~2300mm between the mouth of pipe of two ends；In curved pipe group (1)
Every curved pipe same end pipe mouthful the line of centres perpendicular to the long side of reinforced concrete brace (3)；
Between curved pipe group (1) apart from r=0.38H~0.42H, H represents the height of reinforced concrete brace (3), mm；
Middle position between curved pipe group (1) is embedded with 2 straight tubes, and every straight tube (2) is perpendicular to reinforced concrete brace
(3) upper plane, every straight tube (2) the upper end mouth of pipe is equal with the distance for the curved pipe upper end mouth of pipe that both sides are neighbouring, every straight tube
(2) the upper end mouth of pipe is concordant with the two ends mouth of pipe of curved pipe group (1), be higher by plane 40 on reinforced concrete brace (3)~
60mm；
The pre-buried number of the curved pipe group (1) is：A) when the width R of reinforced concrete brace (3) is less than 700mm, arc
Pipe is single arrangement in reinforced concrete brace (3)；B) when the width R of reinforced concrete brace (3) is more than or equal to
During 700mm, curved pipe is 3 arrangements, the curved pipe mouth of pipe spacing of medial arc pipe both sides in reinforced concrete brace (3)
A=0.35R~0.4R.
2. according to claim 1 in foundation ditch reinforced concrete brace demolition blasting bore distribution method, it is characterised in that institute
The radius of curvature ρ of medial arc pipe when stating curved pipe group (1) for 3 arrangements1
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The radius of curvature ρ of both sides curved pipe when the curved pipe group (1) is 3 arrangements or curved pipe when being single arrangement2
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In formula (I) and formula (II)：L represents the air line distance between the mouth of pipe of curved pipe two ends, mm,
H represents the height of reinforced concrete brace (3), mm；
The curved pipe material of the curved pipe group (1) is PVC, and the aperture of every curved pipe is 40~50mm.
3. according to claim 1 in foundation ditch reinforced concrete brace demolition blasting bore distribution method, it is characterised in that institute
It is 2H/9~3H/9 that the lower port of straight tube (2), which is stated, with the distance of reinforced concrete brace (3) lower surface；The straight tube (2)
Material is PVC, and the aperture of straight tube (2) is 40~50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392625.6A CN105973082B (en) | 2016-06-03 | 2016-06-03 | The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392625.6A CN105973082B (en) | 2016-06-03 | 2016-06-03 | The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105973082A CN105973082A (en) | 2016-09-28 |
| CN105973082B true CN105973082B (en) | 2017-10-03 |
Family
ID=57010283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610392625.6A Expired - Fee Related CN105973082B (en) | 2016-06-03 | 2016-06-03 | The bore distribution method of reinforced concrete brace demolition blasting in a kind of foundation ditch |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592602B (en) * | 2016-12-16 | 2018-07-03 | 武汉科技大学 | For the pre-groove to be blasted for removing deep foundation pit reinforced concrete supporting beam |
| CN106759526B (en) * | 2016-12-16 | 2018-10-26 | 武汉科技大学 | A kind of purlin before Brace in Deep Footing Groove beam demolition blasting protects preprocess method |
| CN106592604B (en) * | 2017-01-04 | 2018-06-19 | 武汉科技大学 | Fender post reserves the determining method of protective layer optimum thickness in deep basal pit blast working |
| CN110067581B (en) * | 2019-05-13 | 2020-10-02 | 湖北工业大学 | Arrangement mode and construction method of reinforced concrete support layer pre-buried holes at turnout or opening of tunnel or roadway |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2461251C3 (en) * | 1974-12-23 | 1982-10-07 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Device for pre-assembly, transport and installation of a route or tunnel extension |
| CN104404965A (en) * | 2014-11-05 | 2015-03-11 | 浙江海洋学院 | Method for removing reinforced concrete support beams in foundation pit support |
| CN104669449B (en) * | 2015-02-17 | 2016-09-14 | 上海建工集团股份有限公司 | A kind of drilling equipment and the cutting method of reinforced concrete brace |
| CN105369814B (en) * | 2015-10-14 | 2017-05-31 | 河海大学 | A kind of prefabricated prestressing concrete support and its erection method |
| CN105569377A (en) * | 2016-02-29 | 2016-05-11 | 上海建工五建集团有限公司 | Method for demounting reinforced concrete supporting beam |
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2016
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