CN103900429B - A kind of blasting method of concrete hollow column - Google Patents
A kind of blasting method of concrete hollow column Download PDFInfo
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- CN103900429B CN103900429B CN201410157420.0A CN201410157420A CN103900429B CN 103900429 B CN103900429 B CN 103900429B CN 201410157420 A CN201410157420 A CN 201410157420A CN 103900429 B CN103900429 B CN 103900429B
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- hollow area
- hollow column
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- concrete hollow
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Abstract
The invention discloses a kind of concrete hollow column or blasting method, belong to blasting technique field.The method comprises the following steps: (1) bores apical pore at the top of described concrete hollow column, described apical pore to the hollow area of described concrete hollow column, water filling in described hollow area; (2) bore bottom outlet in the bottom of described concrete hollow column, the water in described hollow area, to the hollow area of described concrete hollow column, is discharged by described bottom outlet; (3) inject cement mortar by described apical pore to described hollow area, when described cement mortar arrives described bottom outlet position, blocked by described bottom outlet, described cement mortar fills whole described hollow area; (4) when after the cement mortar consolidation in described hollow area, by engineering design requirements, described concrete hollow column is holed, implement explosion.When the inventive method has hollow hole or continuous cavity to carry out explosion in concrete column, ensure the blasting method of blasting quality.
Description
Technical field
The invention belongs to blasting technique field, particularly a kind of blasting method of concrete hollow column.
Background technology
In buildings or structures demolition blasting, on concrete column, drillhole blasting is the method generally used.In some engineering, for saving material, alleviating the deadweight of concrete column, accelerating speed of application, in column of being everlasting, be designed with hollow hole or continuous cavity.When this column carries out drillhole blasting, because there is hollow parts in concrete column, big gun hole hole quality when affecting explosion and cause the leakage of detonation gas, be unfavorable for even breakage during concrete material drillhole blasting, easily cause fried and not broken or part concrete can not destroy in explosion, and form a large amount of explosion flyings because of the change of burden, cause demolition accident.
Summary of the invention
The object of the invention is for solve the problem and provide a kind of in concrete column, have hollow hole or cavity carries out explosion continuously time, ensure the blasting method of blasting quality.
The technical solution adopted in the present invention is:
A blasting method for concrete hollow column, comprises the following steps:
(1) bore apical pore at the top of described concrete hollow column, described apical pore to the hollow area of described concrete hollow column, water filling in described hollow area;
(2) bore bottom outlet in the bottom of described concrete hollow column, the water in described hollow area, to the hollow area of described concrete hollow column, is discharged by described bottom outlet;
(3) inject cement mortar by described apical pore to described hollow area, when described cement mortar arrives described bottom outlet position, blocked by described bottom outlet, described cement mortar fills whole described hollow area;
(4) when after the cement mortar consolidation in described hollow area, by engineering design requirements, described concrete hollow column is holed, implement explosion.
Further, the water in described step (1) can determine the size of hollow area and the seal of hollow area.
Further, the foreign material in hollow area can rinse by the water in described step (2).
Preferably, the pore diameter size of described apical pore and described bottom outlet is 4 ~ 6cm.
Preferably, described cement mortar is the mixture of water and cement.
Further, the bottom outlet old and useless newspaper in described step (3) blocks.
The present invention has the following advantages:
(1) slip casting is adopted to repair hollow column, convenient and swift, decrease the problem of boring big gun hole because of chamber portion impact more, therefore save construction cost, saved engineering time, improve efficiency of construction; (2) construction equipment, material are comparatively general, and be easy to buy lease and use, versatility is stronger; (3) the column Drilling big gun hole hole quality after repairing is good, and the number of the boring hole obviously reduces, and shot hole blasting service efficiency is high; (4) after injecting cement slurry sets in concrete column cavity, better with original concrete material cementability, be beneficial to explosive and place and explosion produces concrete column evenly broken.
Accompanying drawing explanation
Structural representation during cement mortar is not injected in the blasting method of a kind of concrete hollow column that Fig. 1 provides for the embodiment of the present invention 1;
Structural representation during cement mortar is injected in the blasting method of a kind of concrete hollow column that Fig. 2 provides for the embodiment of the present invention 1.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the present invention will be further described in detail.
Embodiment 1
Present embodiments provide a kind of blasting method of concrete hollow column, the method is used in certain viaduct pier and implements drillhole blasting dismounting.In drilling construction process, find that bridge pier center is hollow and continuous cavity, so adopt blasting method of the present invention, this comprises the following steps:
(1) bore apical pore 3 at the top of concrete hollow column 1, the hollow area 2 of apical pore 3 to concrete hollow column 1, water filling in hollow area 2, with the seal of the size and hollow area 2 of determining hollow area 2;
(2) bore bottom outlet 4 in the bottom of concrete hollow column 1, the hollow area 2 of bottom outlet 4 to concrete hollow column 1, the foreign material in hollow area 2 can rinse by water, are finally discharged by the water in hollow area 2;
(3) inject cement mortar 5 by apical pore 3 to hollow area 2, cement mortar 5 is the mixture of water and cement.When cement mortar 5 arrives bottom outlet 4 position, blocked by bottom outlet 4 with old and useless newspaper, cement mortar 5 fills whole hollow area 2.The pore diameter size of apical pore 3 and bottom outlet 4 is 4cm;
(4) when after cement mortar 5 consolidation in hollow area 2, by engineering design requirements, brill big gun hole 6 is carried out to concrete hollow column 1, implement explosion.
Embodiment 2
As different from Example 1, the pore diameter size of apical pore 3 and bottom outlet 4 is 5cm to the present embodiment.
The present invention adopts slip casting rehabilitating concrete hollow column 1, convenient and swift, decreases the problem of boring big gun hole because of chamber portion impact more, therefore saves construction cost, saved engineering time, improve efficiency of construction; Construction equipment, material are comparatively general, and be easy to buy lease and use, versatility is stronger; Concrete hollow column 1 Drilling big gun hole hole quality after repairing is good, and the number of the boring hole obviously reduces, and shot hole blasting service efficiency is high; Inject in concrete hollow column 1 cavity after cement mortar 5 solidifies, better with original concrete material cementability, be beneficial to explosive and place and explosion produces even fragmentation to concrete hollow column 1.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a blasting method for concrete hollow column, is characterized in that, comprises the following steps:
(1) bore apical pore at the top of described concrete hollow column, described apical pore to the hollow area of described concrete hollow column, water filling in described hollow area;
(2) bore bottom outlet in the bottom of described concrete hollow column, the water in described hollow area, to the hollow area of described concrete hollow column, is discharged by described bottom outlet;
(3) inject cement mortar by described apical pore to described hollow area, when described cement mortar arrives described bottom outlet position, blocked by described bottom outlet, described cement mortar fills whole described hollow area;
(4) when after the cement mortar consolidation in described hollow area, by engineering design requirements, described concrete hollow column is holed, implement explosion;
The pore diameter size of described apical pore and described bottom outlet is 4 ~ 6cm.
2. the blasting method of concrete hollow column according to claim 1, is characterized in that, the water in described step (1) can determine the size of hollow area and the seal of hollow area.
3. the blasting method of concrete hollow column according to claim 1, is characterized in that, the foreign material in hollow area can rinse by the water in described step (2).
4. the blasting method of concrete hollow column according to claim 1, is characterized in that, described cement mortar is the mixture of water and cement.
5. the blasting method of concrete hollow column according to claim 1, is characterized in that, the bottom outlet old and useless newspaper in described step (3) blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157420.0A CN103900429B (en) | 2014-04-18 | 2014-04-18 | A kind of blasting method of concrete hollow column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157420.0A CN103900429B (en) | 2014-04-18 | 2014-04-18 | A kind of blasting method of concrete hollow column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103900429A CN103900429A (en) | 2014-07-02 |
| CN103900429B true CN103900429B (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410157420.0A Active CN103900429B (en) | 2014-04-18 | 2014-04-18 | A kind of blasting method of concrete hollow column |
Country Status (1)
| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105823384A (en) * | 2016-03-28 | 2016-08-03 | 贵州新联爆破工程集团有限公司 | Regularly polygonal post drilling and blasting method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040074A (en) * | 1988-07-30 | 1990-02-28 | 斯科钦斯基矿业学院 | Utilize the method for blast crushing kinds of rock |
| CN102392420A (en) * | 2011-10-31 | 2012-03-28 | 刘其伟 | Vertical crack grouting and reinforcing method of prestressed concrete hollow slab bridge bottom plate |
| CN103175452A (en) * | 2013-03-25 | 2013-06-26 | 姬云峰 | Symmetrically swinging blasting method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100460752B1 (en) * | 2002-09-11 | 2004-12-08 | 주식회사 코리아카코 | Blasting dissolution method of wall |
-
2014
- 2014-04-18 CN CN201410157420.0A patent/CN103900429B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040074A (en) * | 1988-07-30 | 1990-02-28 | 斯科钦斯基矿业学院 | Utilize the method for blast crushing kinds of rock |
| CN102392420A (en) * | 2011-10-31 | 2012-03-28 | 刘其伟 | Vertical crack grouting and reinforcing method of prestressed concrete hollow slab bridge bottom plate |
| CN103175452A (en) * | 2013-03-25 | 2013-06-26 | 姬云峰 | Symmetrically swinging blasting method |
Non-Patent Citations (1)
| Title |
|---|
| 筒状结构填砂爆破的药量计算探讨;曾赞文等;《工程爆破》;20090930;第15卷(第3期);第13-16页 * |
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| CN103900429A (en) | 2014-07-02 |
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