CN1324205C - Construction process for steel pipe concrete - Google Patents
Construction process for steel pipe concrete Download PDFInfo
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- CN1324205C CN1324205C CNB2005100187945A CN200510018794A CN1324205C CN 1324205 C CN1324205 C CN 1324205C CN B2005100187945 A CNB2005100187945 A CN B2005100187945A CN 200510018794 A CN200510018794 A CN 200510018794A CN 1324205 C CN1324205 C CN 1324205C
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Abstract
The present invention relates to construction technology for steel pipe concrete, which is characterized in that the construction technology comprises the following steps: firstly, the top end of a large steel pipe to be perfused is sealed before perfusion, a small hole with the diameter of 10 to 20cm is arranged on the upper end of the large steel pipe to be perfused, a small steel tube with the diameter corresponding to the diameter of the small hole is welded in the small hole and is vertical to the wall of the large steel pipe, and the small steel pipe is connected with a vacuum pump by a soft pipe; secondly, pumping operation is started on the lower end of the large steel pipe, the vacuum pump starts vacuumizing operation after perfusion height reaches more than 1.5cm, when concrete is perfused to a position which is 1 meter away from the top end of the large steel pipe, the vacuum pump is closed, the soft pipe is taken off rapidly, the pumping operation is stopped till more than one cubic meter of concrete is discharged, and the small hole is welded after the small steel pipe is cut. The present invention can reduce pumping difficulty, can enhance the sticky density between core concrete and walls of steel pipes simultaneously and can increase the cooperation bearing capacity of steel pipes and the core concrete.
Description
Technical field
The present invention relates to a kind of construction technology of concrete filled steel tube.
Background technology
Concrete filled steel tube has supporting capacity height, plasticity and good toughness, easy construction, and fire resistance and advantage such as good in economic efficiency are applied rapidly in high-rise and longspan structure in recent years.Since nineteen ninety had been built up concrete-filled steel tubes arch bridge-grey bridge of span 110m in China Sichuan Province, concrete-filled steel tubes arch bridge in the short period of time, had been built up more than 200 concrete-filled steel tubes arch bridge in succession in China's fast development.And,, more large span development more high-rise along with engineering structures court, the concrete filled steel tube caliber is increasing, and height and span also increase fast.This causes the steel pipe concrete pumping difficulty of construction to strengthen.The more important thing is, combining closely between steel pipe walls and the core concrete is the key point of the collaborative carrying effect of encased structures performance, and common concrete-filled steel tube construction technology forms one deck air film easily between sclerosis core concrete and steel pipe walls, influences the performance of the collaborative supporting capacity of steel pipe and core concrete.The problem that solves formation air film between steel pipe concrete pumping construction difficult problem and steel pipe walls and the core concrete is for improving concrete-filled steel tube construction efficient, and it is significant to improve steel tube concrete quality.
Summary of the invention
Problem at air film between above-mentioned steel pipe concrete pumping construction difficult problem and steel pipe walls and core concrete, the object of the present invention is to provide a kind of reduction pumping difficulty, strengthen the density that bonds between core concrete and the steel pipe walls simultaneously, the construction technology of the concrete filled steel tube of the collaborative supporting capacity of raising steel pipe and core concrete.
To achieve these goals, technical scheme of the present invention is: a kind of construction technology of concrete filled steel tube, comprise the steps: 1). before perfusion, with big steel pipe top closure to be poured into, open the aperture that a diameter is 10cm-20cm in big steel pipe upper end to be watered, and at the aperture place perpendicular to the big steel pipe wall burn-on one with the corresponding little steel pipe of hole diameter, little steel pipe is linked to each other with vacuum pump with flexible pipe; 2). begin pumping construction in the big steel pipe lower end: pump into lubricated water earlier, then pump into all the other components mortar identical except that no coarse aggregate again with concrete to be poured into, and then pump into concrete to be poured into, more than influx height reaches 1.5m after, vacuum pump begins to vacuumize; When concrete spouting arrives apart from 1m place, big steel pipe top, vacuum pump cuts out, take off flexible pipe rapidly, continue mortar all the little steel pipe emptying from weld of pumping of concrete, until discharging 1m to lubricated water and no coarse aggregate
3Till the above concrete, stop pumping construction, after little steel pipe is cut off that the apertured orifice weldering is dead.
Described little steel pipe length is 20cm-30cm.
If big steel pipe length to be poured into reaches 200m when above, weldering divides the storehouse plate in the big steel pipe, open the aperture that a diameter is 10cm-20cm respectively in minute plate both sides, a storehouse steel pipe walls, and at the aperture place perpendicular to the big steel pipe wall burn-on one with the corresponding little steel pipe of hole diameter, little steel pipe is linked to each other with vacuum pump with flexible pipe, carry out the perfusion of branch storehouse.
The present invention is when concrete carries out the jacking pumping construction, and the vacuum pump of big steel pipe upper end to be poured into is discharged the air of steel duct, forms negative pressure on the one hand and alleviate the resistance that concrete rises in steel duct in steel pipe, reduces the pumping difficulty; Avoid on the other hand forming air film between steel pipe walls and the core concrete, strengthen the compactness that bonds between steel pipe walls and the concrete, improve the collaborative supporting capacity of steel pipe and core concrete.
Compared with prior art, the present invention has the efficiency of construction height, the distinguishing feature that construction quality is good.
The specific embodiment
Embodiment 1:
Carry out the concrete spouting construction of certain building steel core concrete column, this column diameter 0.5m, height 50m.Step is as follows: 1). before perfusion, with big steel pipe top closure to be poured into, open the aperture that a diameter is 10cm in big steel pipe to be watered upper end, and at the aperture place perpendicular to the big steel pipe wall burn-on a diameter be 10cm, length be 20cm little steel pipe, check weldquality, guarantee its tightness; Hose diameter is corresponding with little diameter of steel tube, with flexible pipe the vacuum pump of little steel pipe with a power 3kw is linked to each other.2). finish after the above-mentioned preparation, begin pumping construction: pump into 0.2m earlier in the big steel pipe lower end
3Lubricated water, then pump into 0.5m again
3And then all the other components mortar identical with concrete to be poured into pump into concrete to be poured into except that no coarse aggregate, and when influx height arrived 1.5m, vacuum pump began to vacuumize; When concrete spouting arrives apart from 1m place, big steel pipe top, vacuum pump cuts out, flexible pipe is transferred to from little steel pipe rapidly, continue mortar all the little steel pipe emptying from weld of pumping of concrete, until discharging 1m to lubricated water and no coarse aggregate
3(emerge from aperture) till the above concrete, stop pumping construction up to the uniform concrete of quality, after little steel pipe is cut off that the apertured orifice weldering is dead.
Embodiment 2:
Carry out certain steel pipe arch bridge concrete spouting construction, steel tube arch arc length 400m, diameter 1m.Steel tube arch is carried out bilateral symmetry jacking pumping construction, carry out the branch storehouse in both sides apart from arch springing 200m arc length place (vault place), interior weldering divides the storehouse plate, checks that weld seam guarantees tightness.Open the aperture of a diameter 20cm respectively in distance arch springing 200m arc length punishment storehouse plate (vault branch storehouse plate) both sides steel pipe walls, and on aperture, weld the little steel pipe of one section diameter 20cm, length 30cm, check weldquality, guarantee its tightness perpendicular to the steel pipe walls direction; With flexible pipe the vacuum pump of little steel pipe with a power 5kw linked to each other.Finish after the above-mentioned preparation, begin pumping construction in the steel pipe lower end.Pump line is connected to branch storehouse plate downside perfusing hole, pumps into 0.3m earlier
3Water then pumps into 1m again
3And then all the other components mortar identical with concrete to be poured into except that no coarse aggregate pump into the concrete that designs label.When treating concrete spouting, open vacuum pump and begin to vacuumize to the 1.5m height.When treating concrete spouting to distance branch storehouse plate 1m, close vacuum pump, flexible pipe is transferred to from little steel pipe rapidly, continue pumping of concrete to lubricated water and mortar and discharge aperture fully, emerge from aperture up to the uniform concrete of quality, stop pumping construction, after little steel pipe is cut off that the apertured orifice weldering is dead.Pump line is connected to branch storehouse plate upside perfusing hole, proceeds the jacking pouring construction until finishing by said procedure.
Claims (3)
1. the construction technology of a concrete filled steel tube, it is characterized in that comprising the steps: 1). before perfusion, with big steel pipe top closure to be poured into, open the aperture that a diameter is 10cm-20cm in big steel pipe upper end to be watered, and at the aperture place perpendicular to the big steel pipe wall burn-on one with the corresponding little steel pipe of hole diameter, little steel pipe is linked to each other with vacuum pump with flexible pipe; 2). begin pumping construction in the big steel pipe lower end: pump into lubricated water earlier, then pump into all the other components mortar identical except that no coarse aggregate again with concrete to be poured into, and then pump into concrete to be poured into, more than influx height reaches 1.5m after, vacuum pump begins to vacuumize; When concrete spouting arrives apart from 1m place, big steel pipe top, vacuum pump cuts out, take off flexible pipe rapidly, continue mortar all the little steel pipe emptying from weld of pumping of concrete, until discharging 1m to lubricated water and no coarse aggregate
3Till the above concrete, stop pumping construction, after little steel pipe is cut off that the apertured orifice weldering is dead.
2. the construction technology of a kind of concrete filled steel tube according to claim 1, it is characterized in that: described little steel pipe length is 20cm-30cm.
3. the construction technology of a kind of concrete filled steel tube according to claim 1, it is characterized in that: if big steel pipe length to be poured into reaches 200m when above, weldering divides the storehouse plate in the big steel pipe, open the aperture that a diameter is 10cm-20cm respectively in minute plate both sides, a storehouse steel pipe walls, and at the aperture place perpendicular to the big steel pipe wall burn-on one with the corresponding little steel pipe of hole diameter, little steel pipe is linked to each other with vacuum pump with flexible pipe, carry out the perfusion of branch storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100187945A CN1324205C (en) | 2005-05-27 | 2005-05-27 | Construction process for steel pipe concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100187945A CN1324205C (en) | 2005-05-27 | 2005-05-27 | Construction process for steel pipe concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1702244A CN1702244A (en) | 2005-11-30 |
| CN1324205C true CN1324205C (en) | 2007-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100187945A Expired - Fee Related CN1324205C (en) | 2005-05-27 | 2005-05-27 | Construction process for steel pipe concrete |
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| Country | Link |
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| CN (1) | CN1324205C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296818A (en) * | 2011-05-19 | 2011-12-28 | 中铁第四勘察设计院集团有限公司 | Method for vacuum pouring of concrete in steel pipe |
| CN102587663A (en) * | 2011-12-16 | 2012-07-18 | 中国建筑第六工程局有限公司 | Concrete construction process of steel tube columns of super-high-rise building |
| CN103240802B (en) * | 2013-05-16 | 2015-07-08 | 淮海工学院 | Production method of prestress concrete filled steel tube |
| CN106835998B (en) * | 2017-03-29 | 2018-08-14 | 贵州桥梁建设集团有限责任公司 | Technique is pushed up on being filled under a kind of CFST Arch Bridge pipe inner concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617685A (en) * | 1992-04-06 | 1997-04-08 | Eidgenoessische Materialpruefungs- Und Forschungsanstalt Empa | Method and apparatus for increasing the shear strength of a construction structure |
| CN1538012A (en) * | 2003-10-23 | 2004-10-20 | 孔凡营 | Hollow steel pipe with concrete in gap of coaxial-pipe |
-
2005
- 2005-05-27 CN CNB2005100187945A patent/CN1324205C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617685A (en) * | 1992-04-06 | 1997-04-08 | Eidgenoessische Materialpruefungs- Und Forschungsanstalt Empa | Method and apparatus for increasing the shear strength of a construction structure |
| CN1538012A (en) * | 2003-10-23 | 2004-10-20 | 孔凡营 | Hollow steel pipe with concrete in gap of coaxial-pipe |
Non-Patent Citations (4)
| Title |
|---|
| 武汉市江汉三桥钢管混凝土设计与施工 丁庆军 管斌君 胡曙光，混凝土，第133期 2000 * |
| 钢管混凝土拱桥主拱肋混凝土灌注施工质量控制 高吉才，华东公路，第141期 2003 * |
| 钢管混凝土拱桥主拱肋混凝土灌注施工质量控制 高吉才，华东公路，第141期 2003;钢管混凝土柱施工技术 叶粤宁 何继军，广西土木建筑，第27卷 2002;武汉市江汉三桥钢管混凝土设计与施工 丁庆军 管斌君 胡曙光，混凝土，第133期 2000 * |
| 钢管混凝土柱施工技术 叶粤宁 何继军，广西土木建筑，第27卷 2002 * |
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| Publication number | Publication date |
|---|---|
| CN1702244A (en) | 2005-11-30 |
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