CN105780735A - Positioning method of two-way prestressed U-shaped aqueduct bellows hole channel - Google Patents
Positioning method of two-way prestressed U-shaped aqueduct bellows hole channel Download PDFInfo
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- CN105780735A CN105780735A CN201610170011.3A CN201610170011A CN105780735A CN 105780735 A CN105780735 A CN 105780735A CN 201610170011 A CN201610170011 A CN 201610170011A CN 105780735 A CN105780735 A CN 105780735A
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- reinforcement
- longitudinal
- hoop
- circumferential
- corrugated pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Sewage (AREA)
Abstract
The invention discloses a positioning method of a two-way prestressed U-shaped aqueduct bellows hole channel. A longitudinal bellows is positioned in the steps that (1) after an inside circumferential rebar and an outside circumferential rebar of an aqueduct body reinforcing cage are positioned and bound, two lower vertical rebars are respectively welded on the outside circumferential rebar and on the left and right sides of each lower longitudinal bellows, and two horizontal rebars are respectively welded on the outside circumferential rebar and on the upper and lower sides of each lower longitudinal bellows; (2) two upper vertical rebars are respectively welded on a folding rebar and on the left and right sides of each upper longitudinal bellows. A circumferential bellows is positioned in the steps that (1) two straight rebars are respectively arranged on the front and back sides of each circumferential bellows, and the upper and lower ends of each straight rebar are welded with corresponding inside and outside longitudinal rebars; (2) a horizontal rebar is welded between the straight rebars on the front and back sides of each circumferential bellows, and each horizontal rebar is fixedly connected with each circumferential bellows by virtue of a steel wire. The positioning method has the advantages of no position change of the longitudinal and circumferential bellows and high accuracy.
Description
Technical field
The present invention relates to two dimension prestressing U-shaped aqueduct, especially relate to two dimension prestressing U-shaped aqueduct corrugated tube duct localization method.
Background technology
U-shaped aqueduct is widely used in all kinds of water delivery engineering due to advantages such as its cross-section of river is good, the loss of flood peak is little, with a slim and graceful figure, good looking appearances.Groove body crack resistance is required that higher U-shaped aqueduct is generally double prestressed concrete structure, is all laid with presstressed reinforcing steel at groove body Parallel to the flow direction and along groove body hoop.Longitudinal rib (is arranged along Parallel to the flow direction) and is typically located in U-shaped aqueduct lower raft, linear is generally straight line.Hoop muscle (circumferentially disposed along groove body) is general consistent with groove body cross-section of river shape, is arranged in outside the cross-section of river, linear for straight line+semicircle+straight line.Cross water owing to U-shaped aqueduct is internal, therefore U-shaped aqueduct cracking resistance is required strict, for instance the U-shaped aqueduct of Middle Line Project For Transferring Water From South To North requires that tension can not occur under each operating mode in inner surface, therefore prestressing force corrugated tube location is particularly important；If corrugated tube irregularity occurs, at a distance of phenomenons such as design attitude deviation are bigger, stretch-draw and friction loss when putting, retraction loss directly affect the effective stress of presstressed reinforcing steel and the overall cracking resistance of groove body.
Existing highway, railroad bridge the structure such as box-girder or tee girder, be generally unidirectional prestressed structure, be namely only longitudinally arranged presstressed reinforcing steel, and be absent from the deep camber hoop flat bellows duct of U-shaped like aqueduct.Longitudinal prestressing muscle is linear is generally straight line+camber line+straight line, is arranged in web or base plate, and is generally monolayer layout.During construction, web or base plate regular reinforcement weld one section of straight reinforcing bar, it welds " well " font or longitudinal rib is positioned by "U" shaped positioning bar.Owing to web or base plate are relatively thin, if occurring, positioning bar is easily finely tuned by deviation.
But, two dimension prestressing U-shaped aqueduct average physique is bigger, for instance the two dimension prestressing U-shaped Prefabricated aqueduct that south water to north Shahe uses, span centre base plate thickness is 0.9m, and end bottom plate thickness is 1.7m, and longitudinal prestressing muscle is rebuilding, and duct is circle corrugated pipe；Lower floor's bellows core line is straight line, and upper strata bellows core line is camber line.Lower floor's presstressed reinforcing steel if there is deviation, owing to base plate is thicker, is therefore difficult to adjust in reinforcing bar cage hoisting process.And groove body ring orientation prestress rib is monolayer layout, duct is flat bellows, positions more strict to duct and is easier to cause deviation.
Summary of the invention
Present invention aim at providing a kind of two dimension prestressing U-shaped aqueduct corrugated tube duct localization method, to solve spacer bar insufficient rigidity, yielding problem after integral channel body reinforcing bar cage hoisting, reach to reduce the later stage manually adjusts workload, improves the purpose of corrugated tube positioning precision simultaneously.
For achieving the above object, the present invention takes following technical proposals:
Two dimension prestressing U-shaped aqueduct corrugated tube duct of the present invention localization method, the longitudinal corrugated pipe including groove body steel reinforcement cage positions and hoop corrugated tube location；
Described longitudinal corrugated pipe location carries out as steps described below:
After the location colligation of the first step, the inner side circumferential reinforcement of described groove body steel reinforcement cage, outside circumferential reinforcement, lower floor's longitudinal corrugated pipe position according to design, the left and right side being positioned at every described lower floor longitudinal corrugated pipe on the circumferential reinforcement of described outside welds lower floor's vertical reinforcement, and the upper and lower side being positioned at Mei Gen lower floor longitudinal corrugated pipe outside on the circumferential reinforcement of side respectively welds a horizontal reinforcement, the broken line reinforcement welding of the top of Mei Gen lower floor vertical reinforcement and groove body steel reinforcement cage；
Second step, according to design longitudinal corrugated pipe position, upper strata, the left and right side being positioned at every described upper strata longitudinal corrugated pipe on described broken line reinforcing bar welds a upper strata vertical reinforcement, and the top of every described upper strata vertical reinforcement is welded with described inner side circumferential reinforcement；Then a camber line reinforcing bar is respectively arranged in the upper and lower side of upper strata longitudinal corrugated pipe, by two described camber line reinforcing bars and every upper strata vertical reinforced-bar-welding；
3rd step, longitudinal direction along groove body steel reinforcement cage, walk above-mentioned first, second step again according to the distance of design, complete the construction of longitudinal corrugated pipe network for location；
Described hoop corrugated tube location carries out as steps described below:
After the location colligation of the first step, the inner side longitudinal reinforcement of described groove body steel reinforcement cage, outside longitudinal reinforcement, arranging a rectilinear reinforcement at the every forward and backward side position of hoop corrugated tube being positioned at longitudinally spaced setting, the upper and lower end portion of described every rectilinear reinforcement welds with corresponding inner side longitudinal reinforcement, outside longitudinal reinforcement respectively；
Second step, between the rectilinear reinforcement of the described every forward and backward side of hoop corrugated tube, it is respectively welded horizontal reinforcement, described every horizontal reinforcement lays respectively at below the hoop corrugated tube of correspondence and connects with corresponding hoop corrugated tube fixing by steel wire, completes the construction of hoop corrugated tube network for location.
The invention has the advantages that by arranging longitudinal corrugated pipe network for location and hoop corrugated tube network for location so that colligation complete after groove body steel reinforcement cage in hoisting process, vertical, hoop corrugated tube invariant position, accuracy is high.Substantially increase the spacer bar rigidity after groove body reinforcing bar cage hoisting, decrease the workload that the later stage manually adjusts simultaneously.
Accompanying drawing explanation
Fig. 1 is the section structure schematic diagram after groove body steel reinforcement cage longitudinal corrugated pipe of the present invention has positioned.
Fig. 2 is the I portion structure for amplifying schematic diagram of Fig. 1.
Fig. 3 is the section structure schematic diagram after groove body steel reinforcement cage hoop corrugated tube of the present invention has positioned.
Fig. 4 is that the A-A of Fig. 3 is to section structure schematic diagram.
Detailed description of the invention
Two dimension prestressing U-shaped aqueduct corrugated tube duct of the present invention localization method, the longitudinal corrugated pipe including groove body steel reinforcement cage positions and hoop corrugated tube location；The section configuration of described longitudinal corrugated pipe selects circular configuration, and the section configuration of described hoop corrugated tube selects oblate structure.
As shown in Figure 1, 2, described longitudinal corrugated pipe location carries out as steps described below:
After the first step, the inner side circumferential reinforcement 1 of described groove body steel reinforcement cage, outside circumferential reinforcement 2 position colligation, lower floor's longitudinal corrugated pipe 3.1 position according to design, the left and right side being positioned at every described lower floor longitudinal corrugated pipe 3.1 on described outside circumferential reinforcement 2 welds lower floor's vertical reinforcement 4.1,4.2, and the broken line reinforcing bar 6 at the top and groove body steel reinforcement cage of respectively welding a horizontal reinforcement 5.1,5.2, Mei Gen lower floor's vertical reinforcement 4.1,4.2, the upper and lower side being positioned at Mei Gen lower floor longitudinal corrugated pipe 3.1 outside on side circumferential reinforcement 2 welds；The effect of lower floor's vertical reinforcement 4.1,4.2 is to limit lower floor's longitudinal corrugated pipe about 3.1 skew, the effect of horizontal reinforcement 5.1,5.2 is to limit lower floor's longitudinal corrugated pipe 3.1 downward shift, and the effect of broken line reinforcing bar 6 is to increase the integral rigidity constituting longitudinal corrugated pipe network for location.
Second step, according to design upper strata longitudinal corrugated pipe 3.2 position, the left and right side being positioned at every described upper strata longitudinal corrugated pipe 3.2 on described broken line reinforcing bar 6 welds a upper strata vertical reinforcement 7.1,7.2, and the top of every described upper strata vertical reinforcement 7.1,7.2 is welded with described inner side circumferential reinforcement 1；Then respectively arrange a camber line reinforcing bar 8.1,8.2 in the upper and lower side of upper strata longitudinal corrugated pipe 3.2, described two camber line reinforcing bars 8.1,8.2 are welded with every upper strata vertical reinforcement 7.1,7.2；Two camber line reinforcing bars 8.1,8.2 limit the downward shift of upper strata longitudinal corrugated pipe 3.2 after welding with every upper strata vertical reinforcement 7.1,7.2.
3rd step, longitudinal direction along groove body steel reinforcement cage, walk above-mentioned first, second step again according to the distance of design, complete the construction of longitudinal corrugated pipe network for location.
As shown in Figure 3,4, described hoop corrugated tube location carries out as steps described below:
After the first step, the inner side longitudinal reinforcement 9 of described groove body steel reinforcement cage, outside longitudinal reinforcement 10 position colligation, arranging a rectilinear reinforcement 12,13 at the every forward and backward side position of hoop corrugated tube 11 being positioned at longitudinally spaced setting, the upper and lower end portion of described every rectilinear reinforcement 12,13 welds with corresponding inner side longitudinal reinforcement 9, outside longitudinal reinforcement 10 respectively；The effect of rectilinear reinforcement 12,13 be in order to limit hoop corrugated tube 11 along crossheading to (longitudinal direction) offset.
Second step, between the rectilinear reinforcement 12,13 of the described every forward and backward side of hoop corrugated tube 11, it is respectively welded horizontal reinforcement 14, described every horizontal reinforcement 14 lays respectively at below the hoop corrugated tube 11 of correspondence and connects with corresponding hoop corrugated tube 11 fixing by steel wire, completes the construction of hoop corrugated tube network for location；The effect of horizontal reinforcement 14 is radially displaceable in order to limit hoop corrugated tube 11.
Claims (1)
1. a two dimension prestressing U-shaped aqueduct corrugated tube duct localization method, the longitudinal corrugated pipe including groove body steel reinforcement cage positions and hoop corrugated tube location；It is characterized in that:
Described longitudinal corrugated pipe location carries out as steps described below:
After the location colligation of the first step, the inner side circumferential reinforcement of described groove body steel reinforcement cage, outside circumferential reinforcement, lower floor's longitudinal corrugated pipe position according to design, the left and right side being positioned at every described lower floor longitudinal corrugated pipe on the circumferential reinforcement of described outside welds lower floor's vertical reinforcement, and the upper and lower side being positioned at Mei Gen lower floor longitudinal corrugated pipe outside on the circumferential reinforcement of side respectively welds a horizontal reinforcement, the broken line reinforcement welding of the top of Mei Gen lower floor vertical reinforcement and groove body steel reinforcement cage；
Second step, according to design longitudinal corrugated pipe position, upper strata, the left and right side being positioned at every described upper strata longitudinal corrugated pipe on described broken line reinforcing bar welds a upper strata vertical reinforcement, and the top of every described upper strata vertical reinforcement is welded with described inner side circumferential reinforcement；Then a camber line reinforcing bar is respectively arranged in the upper and lower side of upper strata longitudinal corrugated pipe, by two described camber line reinforcing bars and every upper strata vertical reinforced-bar-welding；
3rd step, longitudinal direction along groove body steel reinforcement cage, walk above-mentioned first, second step again according to the distance of design, complete the construction of longitudinal corrugated pipe network for location；
Described hoop corrugated tube location carries out as steps described below:
After the location colligation of the first step, the inner side longitudinal reinforcement of described groove body steel reinforcement cage, outside longitudinal reinforcement, arranging a rectilinear reinforcement at the every forward and backward side position of hoop corrugated tube being positioned at longitudinally spaced setting, the upper and lower end portion of described every rectilinear reinforcement welds with corresponding inner side longitudinal reinforcement, outside longitudinal reinforcement respectively；
Second step, between the rectilinear reinforcement of the described every forward and backward side of hoop corrugated tube, it is respectively welded horizontal reinforcement, described every horizontal reinforcement lays respectively at below the hoop corrugated tube of correspondence and connects with corresponding hoop corrugated tube fixing by steel wire, completes the construction of hoop corrugated tube network for location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610170011.3A CN105780735B (en) | 2016-03-23 | 2016-03-23 | Bidirectional prestress U-shaped aqueduct corrugated pipe pore channel positioning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610170011.3A CN105780735B (en) | 2016-03-23 | 2016-03-23 | Bidirectional prestress U-shaped aqueduct corrugated pipe pore channel positioning method |
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| CN105780735A true CN105780735A (en) | 2016-07-20 |
| CN105780735B CN105780735B (en) | 2020-01-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243210A (en) * | 1994-03-07 | 1995-09-19 | Tetsumi Kitabayashi | Water channel body |
| 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 |
| CN201301520Y (en) * | 2008-11-25 | 2009-09-02 | 浙江省交通工程建设集团有限公司 | Prestressed beam drilling bellow positioning reinforced net |
-
2016
- 2016-03-23 CN CN201610170011.3A patent/CN105780735B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243210A (en) * | 1994-03-07 | 1995-09-19 | Tetsumi Kitabayashi | Water channel body |
| 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 |
| CN201301520Y (en) * | 2008-11-25 | 2009-09-02 | 浙江省交通工程建设集团有限公司 | Prestressed beam drilling bellow positioning reinforced net |
Non-Patent Citations (5)
| Title |
|---|
| 余大江: "云南省牛栏江——滇池补水工程输水线8标后张预应力渡槽单端张拉技术", 《水利建设与管理》 * |
| 张玉明 等: "南水北调沙河渡槽预应力结构设计与配筋优化", 《人民长江》 * |
| 谢玉立: "大流量大跨度预应力渡槽支架法现浇施工技术", 《水利建设与管理》 * |
| 赵琴芳、齐建军: "大型"U型"薄壳渡槽后张双向预应力施工技术", 《水利科技与经济》 * |
| 雷朝生: "槽身混凝土入仓方式的应用研究", 《中国水能及电气化》 * |
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