CN104878729A - Method for adopting opposite-direction bilayer prestressed steel structure bracket to modify aqueduct body structure - Google Patents
Method for adopting opposite-direction bilayer prestressed steel structure bracket to modify aqueduct body structure Download PDFInfo
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- CN104878729A CN104878729A CN201510200259.5A CN201510200259A CN104878729A CN 104878729 A CN104878729 A CN 104878729A CN 201510200259 A CN201510200259 A CN 201510200259A CN 104878729 A CN104878729 A CN 104878729A
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Abstract
The invention relates to a method for adopting an opposite-direction bilayer prestressed steel structure bracket to modify an aqueduct body structure and belongs to a method for modifying an old aqueduct with concrete and a structure in connection of two groups of opposite-direction prestressed cables. The method includes: digging a bracket arrangement seam, horizontally arranging unbonded prestressed anchor cables, arranging connection anchor bars, setting up an aqueduct-body external formwork, performing tensioning debugging and anchor seal, and casting high-performance frost-thawing-resistant self-compacting fine-aggregate early strength concrete, wherein the anchor bars are fixedly connected with an embedded limit steel plate of the opposite-direction bilayer prestressed steel structure bracket, two ends of the horizontal prestressed anchor cables are respectively penetratingly connected with the opposite-direction bilayer prestressed steel structure bracket, and the cables are fixedly anchored to the opposite-direction bilayer prestressed steel structure bracket. With the method, the function of the aqueduct can be recovered at low cost, and service life is prolonged. Besides, the method is low carbon, environment friendly, water saving, capable of utilizing waste, resource saving and less in construction waste, thereby being a green invention in the water conservancy industry.
Description
Technical field
The invention belongs to the method that the structure that utilizes concrete to be connected with two groups of incorgruous prestressed cables is transformed old aqueduct.
Background technology
The transformation of steel concrete old aqueduct is Civil Engineering engineering technical problem urgently to be resolved hurrily, early because of most agricultural irrigation aqueduct building time comparatively simultaneously, how making concrete structure not produce concentration of local tensile stress is a difficult problem in this technical problem, existing remodeling method is taked to remove the method for rebuilding more, shortcoming is costly, and the construction period can not ensure water flowing, affect downstream normal water supply, make troubles to agricultural production.
Summary of the invention
The invention provides and a kind ofly adopt incorgruous double-layer prestressed steel work bracket to carry out the method for groove body structure transformation, to solve the problem that the concrete structure existed when old aqueduct transformation produces concentration of local tensile stress.
The technical scheme that the present invention takes is: comprise the following steps:
Dig bracket and arrange seam, horizontal arrangement non-bonding prestress tendon, arrange and be connected dowel, prop up groove body exterior sheathing, stretch-draw debugging and sealing off and covering anchorage, cast high-performance freeze thawing resistance self-compaction microlith early strength concrete, wherein dowel is connected with the pre-buried spacing Interal fixation of incorgruous double-layer prestressed steel work bracket, horizontal prestress anchorage cable two ends respectively with the cross-under of incorgruous double-layer prestressed steel work bracket, drag-line and incorgruous double-layer prestressed steel work bracket fixed anchoring, it is outside that high-performance freeze thawing resistance self-compaction microlith early strength concrete is positioned at incorgruous double-layer prestressed steel work bracket;
The structure of described incorgruous double-layer prestressed steel work bracket is: pre-buried spacing steel plate is fixedly connected with spacing steel plate one, welding supporting steel plate one is fixedly connected with spacing steel plate one, anchor ring one is fixedly connected with spacing steel plate one, seamless steel pipe with weld supporting steel plate one and be fixedly connected with, spacing steel plate two is connected with pre-buried spacing Interal fixation, welding supporting steel plate two is fixedly connected with spacing steel plate two, anchor ring two is fixedly connected with spacing steel plate two, steel strand intermediate plate is connected with anchor ring two, pre-buried spacing steel plate there is reserved drag-line through hole two, spacing steel plate one there is reserved drag-line through hole one,
Described high-performance freeze thawing resistance self-compaction microlith early strength concrete comprises the raw material of following ratio of weight and number:
General purpose portland cement PO42.5 700 ~ 1000 parts,
I grade 0 ~ 400 part, flyash,
Medium coarse sand 2000 ~ 3200 parts,
Stone 5 ~ 10mm 1500 ~ 3500 parts,
300 ~ 490 parts, water,
Complex material comprises the raw material of following ratio of weight and number:
High-efficiency water-reducing agent of poly-carboxylic acid 60 ~ 150 parts,
Air entraining agent 0.03 ~ 3 part,
Silicones polyethers emulsion 0.02 ~ 4 part,
Thick plasticity-maintaining agent falls in low viscosity, viscosity 50 ~ 100cps 0 ~ 12 part,
Naphthalenesulfonate formaldehyde condensation compound 0 ~ 12 part,
Triethanolamine 0.03 ~ 11 part.
The concrete structure that the present invention exists when can solve the transformation of old aqueduct produces the problem of concentration of local tensile stress, adopts the present invention effectively can solve duration, the transmission of incorgruous power system, the key issue of construction period water flowing.
The present invention is that the solution of a kind of modern technologies is familiar with the not enough technical problem left over to engineering and material in early days; old structure is transformed by modern new construction and new material technology; complete construction not affecting under the prerequisite that former engineering normally runs; little span aqueduct is modified as large span slant-pull structure; utilize the performance of steel work that two groups of incorgruous large pulling force are converted to pressure, shearing, guarantee that concrete structure does not produce the larger tensile stress in local.Its using function of effective lifting also significantly improves its application life.
Horizontal prestress anchorage cable is constraint aqueduct and bears the main force support structure of drag-line power.Its processing, make all by the boring of steel plate, weld, load system is all with the realization of welding steel bracket transmitting force.Cable sleeve is just accurately located before bracket is installed, and and Plate Welding, do not conjugate when guaranteeing fluid concrete.Vertical channel body direction, with prestressing force restraint slot body, prestressing force active region adopts high-performance freeze thawing resistance self-compaction pea gravel concreten, both ensures easy construction, and also meets intensity and life requirement.
The present invention is used for structurally-modified node process, the large pulling force of two groups of incorgruous steel strand can be changed and be applied on concrete structure, makes concrete structure that local tensile stress not occur.For simple and easy suspension cable structure comparatively the usual professional structure of standard reduce investment outlay more than 50%, technology is simple and easy to do, and general designing unit all can design, and general engineering construction enterprise all can construct.Without temporary works, there is no construction risk in flood season.
The present invention carries out according to the theory of green water management, utilize the present invention low cost can recover aqueduct function and improve application life, and low-carbon (LC), environmental protection, economizing on water, utilize waste material, saving resource, low building waste, is therefore a green invention of water conservancy industry.
Accompanying drawing explanation
Fig. 1 is the incorgruous double-layer prestressed steel work bracket structure load schematic diagram of the present invention;
Fig. 2 is arrangement diagram after the incorgruous double-layer prestressed steel work bracket structure of the present invention is reeved;
Fig. 3 is the incorgruous double-layer prestressed steel work bracket structure front view of the present invention;
Fig. 4 is the right view of Fig. 3;
fig. 5 is the C-C sectional view of Fig. 4.
Detailed description of the invention
Embodiment 1
Dig bracket and arrange seam, horizontal arrangement non-bonding prestress tendon 5, arrange and be connected dowel 2, prop up groove body 3 exterior sheathing, stretch-draw debugging and sealing off and covering anchorage, cast high-performance freeze thawing resistance self-compaction microlith early strength concrete 4, wherein dowel 2 is fixedly connected with the pre-buried spacing steel plate 1001 of incorgruous double-layer prestressed steel work bracket 1, horizontal prestress anchorage cable 5 two ends respectively with the cross-under of incorgruous double-layer prestressed steel work bracket, drag-line 6 and incorgruous double-layer prestressed steel work bracket fixed anchoring, it is outside that high-performance freeze thawing resistance self-compaction microlith early strength concrete 4 is positioned at incorgruous double-layer prestressed steel work bracket,
The structure of described incorgruous double-layer prestressed steel work bracket 1 is: pre-buried spacing steel plate 1001 is fixedly connected with spacing steel plate 1, welding supporting steel plate 1 is fixedly connected with spacing steel plate one, anchor ring 1 is fixedly connected with spacing steel plate 1, seamless steel pipe 1006 with weld supporting steel plate one and be fixedly connected with, spacing steel plate 2 1004 is connected with pre-buried spacing Interal fixation, welding supporting steel plate 2 1005 is fixedly connected with spacing steel plate two, anchor ring 2 1007 is fixedly connected with spacing steel plate two, steel strand intermediate plate 1009 is connected with anchor ring 2 1007, pre-buried spacing steel plate 1001 there is reserved drag-line through hole 2 1010, spacing steel plate 1 there is reserved drag-line through hole 1,
Described high-performance freeze thawing resistance self-compaction microlith early strength concrete comprises the raw material of following ratio of weight and number:
General purpose portland cement PO42.5 700kg,
Medium coarse sand 2000kg,
Stone 5 ~ 10mm 1500kg,
Water 300kg,
Complex material comprises the raw material of following ratio of weight and number:
High-efficiency water-reducing agent of poly-carboxylic acid 60kg,
Air entraining agent 0.03kg,
Silicones polyethers emulsion 0.02kg,
Triethanolamine 0.03kg.
Embodiment 2
Dig bracket and arrange seam, horizontal arrangement non-bonding prestress tendon 5, arrange and be connected dowel 2, prop up groove body 3 exterior sheathing, stretch-draw debugging and sealing off and covering anchorage, cast high-performance freeze thawing resistance self-compaction microlith early strength concrete 4, wherein dowel 2 is fixedly connected with the pre-buried spacing steel plate 1001 of incorgruous double-layer prestressed steel work bracket 1, horizontal prestress anchorage cable 5 two ends respectively with the cross-under of incorgruous double-layer prestressed steel work bracket, drag-line 6 and incorgruous double-layer prestressed steel work bracket fixed anchoring, it is outside that high-performance freeze thawing resistance self-compaction microlith early strength concrete 4 is positioned at incorgruous double-layer prestressed steel work bracket,
The structure of described incorgruous double-layer prestressed steel work bracket 1 is: pre-buried spacing steel plate 1001 is fixedly connected with spacing steel plate 1, welding supporting steel plate 1 is fixedly connected with spacing steel plate one, anchor ring 1 is fixedly connected with spacing steel plate 1, seamless steel pipe 1006 with weld supporting steel plate one and be fixedly connected with, spacing steel plate 2 1004 is connected with pre-buried spacing Interal fixation, welding supporting steel plate 2 1005 is fixedly connected with spacing steel plate two, anchor ring 2 1007 is fixedly connected with spacing steel plate two, steel strand intermediate plate 1009 is connected with anchor ring 2 1007, pre-buried spacing steel plate 1001 there is reserved drag-line through hole 2 1010, spacing steel plate 1 there is reserved drag-line through hole 1,
Described high-performance freeze thawing resistance self-compaction microlith early strength concrete comprises the raw material of following ratio of weight and number:
General purpose portland cement PO42.5 850kg,
Flyash I grade of 200kg,
Medium coarse sand 2600kg,
Stone 5 ~ 10mm 2000kg,
Water 395kg,
Complex material comprises the raw material of following ratio of weight and number:
High-efficiency water-reducing agent of poly-carboxylic acid 105kg,
Air entraining agent 1.51kg,
Silicones polyethers emulsion 2.01kg,
Thick plasticity-maintaining agent falls in low viscosity, viscosity at 50 ~ 100cps 6kg,
Naphthalenesulfonate formaldehyde condensation compound 6kg,
Triethanolamine 5.51kg.
Embodiment 3
Dig bracket and arrange seam, horizontal arrangement non-bonding prestress tendon 5, arrange and be connected dowel 2, prop up groove body 3 exterior sheathing, stretch-draw debugging and sealing off and covering anchorage, cast high-performance freeze thawing resistance self-compaction microlith early strength concrete 4, wherein dowel 2 is fixedly connected with the pre-buried spacing steel plate 1001 of incorgruous double-layer prestressed steel work bracket 1, horizontal prestress anchorage cable 5 two ends respectively with the cross-under of incorgruous double-layer prestressed steel work bracket, drag-line 6 and incorgruous double-layer prestressed steel work bracket fixed anchoring, it is outside that high-performance freeze thawing resistance self-compaction microlith early strength concrete 4 is positioned at incorgruous double-layer prestressed steel work bracket,
The structure of described incorgruous double-layer prestressed steel work bracket 1 is: pre-buried spacing steel plate 1001 is fixedly connected with spacing steel plate 1, welding supporting steel plate 1 is fixedly connected with spacing steel plate one, anchor ring 1 is fixedly connected with spacing steel plate 1, seamless steel pipe 1006 with weld supporting steel plate one and be fixedly connected with, spacing steel plate 2 1004 is connected with pre-buried spacing Interal fixation, welding supporting steel plate 2 1005 is fixedly connected with spacing steel plate two, anchor ring 2 1007 is fixedly connected with spacing steel plate two, steel strand intermediate plate 1009 is connected with anchor ring 2 1007, pre-buried spacing steel plate 1001 there is reserved drag-line through hole 2 1010, spacing steel plate 1 there is reserved drag-line through hole 1,
Described high-performance freeze thawing resistance self-compaction microlith early strength concrete comprises the raw material of following ratio of weight and number:
General purpose portland cement PO42.5 1000kg,
Flyash I grade of 400kg,
Medium coarse sand 3200kg,
Stone 5 ~ 10mm 3500kg,
Water 490kg,
Complex material comprises the raw material of following ratio of weight and number:
High-efficiency water-reducing agent of poly-carboxylic acid 150kg,
Air entraining agent 3kg,
Silicones polyethers emulsion 4kg,
Thick plasticity-maintaining agent falls in low viscosity, viscosity at 50 ~ 100cps 12kg,
Naphthalenesulfonate formaldehyde condensation compound 12kg,
Triethanolamine 11kg.
Claims (3)
1. adopt incorgruous double-layer prestressed steel work bracket to carry out a method for groove body structure transformation, it is characterized in that comprising the following steps:
Dig bracket and arrange seam, horizontal arrangement non-bonding prestress tendon, arrange and be connected dowel, prop up groove body exterior sheathing, stretch-draw debugging and sealing off and covering anchorage, cast high-performance freeze thawing resistance self-compaction microlith early strength concrete, wherein dowel is connected with the pre-buried spacing Interal fixation of incorgruous double-layer prestressed steel work bracket, horizontal prestress anchorage cable two ends respectively with the cross-under of incorgruous double-layer prestressed steel work bracket, drag-line and incorgruous double-layer prestressed steel work bracket fixed anchoring, it is outside that high-performance freeze thawing resistance self-compaction microlith early strength concrete is positioned at incorgruous double-layer prestressed steel work bracket.
2. according to claim 1ly a kind ofly adopt incorgruous double-layer prestressed steel work bracket to carry out the method for groove body structure transformation, it is characterized in that the structure of described incorgruous double-layer prestressed steel work bracket is: pre-buried spacing steel plate is fixedly connected with spacing steel plate one, welding supporting steel plate one is fixedly connected with spacing steel plate one, anchor ring one is fixedly connected with spacing steel plate one, seamless steel pipe with weld supporting steel plate one and be fixedly connected with, spacing steel plate two is connected with pre-buried spacing Interal fixation, welding supporting steel plate two is fixedly connected with spacing steel plate two, anchor ring two is fixedly connected with spacing steel plate two, steel strand intermediate plate is connected with anchor ring two, pre-buried spacing steel plate there is reserved drag-line through hole two, spacing steel plate one there is reserved drag-line through hole one.
3. according to claim 1ly a kind ofly adopt incorgruous double-layer prestressed steel work bracket to carry out the method for groove body structure transformation, it is characterized in that, described high-performance freeze thawing resistance self-compaction microlith early strength concrete comprises the raw material of following ratio of weight and number:
General purpose portland cement PO42.5 700 ~ 1000 parts,
I grade 0 ~ 400 part, flyash,
Medium coarse sand 2000 ~ 3200 parts,
Stone 5 ~ 10mm 1500 ~ 3500 parts,
300 ~ 490 parts, water,
Complex material comprises the raw material of following ratio of weight and number:
High-efficiency water-reducing agent of poly-carboxylic acid 60 ~ 150 parts,
Air entraining agent 0.03 ~ 3 part,
Silicones polyethers emulsion 0.02 ~ 4 part,
Thick plasticity-maintaining agent falls in low viscosity, viscosity 50 ~ 100cps 0 ~ 12 part,
Naphthalenesulfonate formaldehyde condensation compound 0 ~ 12 part,
Triethanolamine 0.03 ~ 11 part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200259.5A CN104878729B (en) | 2015-04-27 | 2015-04-27 | Use the method that incorgruous double-layer prestressed steel construction bracket carries out groove body structure transformation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510200259.5A CN104878729B (en) | 2015-04-27 | 2015-04-27 | Use the method that incorgruous double-layer prestressed steel construction bracket carries out groove body structure transformation |
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| CN104878729A true CN104878729A (en) | 2015-09-02 |
| CN104878729B CN104878729B (en) | 2016-09-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11140849A (en) * | 1997-11-06 | 1999-05-25 | Maruishi Kogyo | Correction method and device for aqueduct bridge |
| CN101307595A (en) * | 2008-07-09 | 2008-11-19 | 葛洲坝集团第一工程有限公司 | Large-sized aqueduct prestressing force construction method |
| CN202416260U (en) * | 2012-01-19 | 2012-09-05 | 贵州省水利水电勘测设计研究院 | Transverse prestressed reinforced structure of concrete aqueduct |
| CN202559307U (en) * | 2012-05-17 | 2012-11-28 | 中国葛洲坝集团股份有限公司 | Combined U-shaped aqueduct precast straining beam supporting device |
| CN203729282U (en) * | 2013-12-06 | 2014-07-23 | 湖南大学 | Reinforcing structure of thin wall type hydraulic structure |
-
2015
- 2015-04-27 CN CN201510200259.5A patent/CN104878729B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11140849A (en) * | 1997-11-06 | 1999-05-25 | Maruishi Kogyo | Correction method and device for aqueduct bridge |
| CN101307595A (en) * | 2008-07-09 | 2008-11-19 | 葛洲坝集团第一工程有限公司 | Large-sized aqueduct prestressing force construction method |
| CN202416260U (en) * | 2012-01-19 | 2012-09-05 | 贵州省水利水电勘测设计研究院 | Transverse prestressed reinforced structure of concrete aqueduct |
| CN202559307U (en) * | 2012-05-17 | 2012-11-28 | 中国葛洲坝集团股份有限公司 | Combined U-shaped aqueduct precast straining beam supporting device |
| CN203729282U (en) * | 2013-12-06 | 2014-07-23 | 湖南大学 | Reinforcing structure of thin wall type hydraulic structure |
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