CN103158198A - Manufacturing method of big hollow beam plate slope prefabricated by prestressed concrete - Google Patents
Manufacturing method of big hollow beam plate slope prefabricated by prestressed concrete Download PDFInfo
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- CN103158198A CN103158198A CN2011104131319A CN201110413131A CN103158198A CN 103158198 A CN103158198 A CN 103158198A CN 2011104131319 A CN2011104131319 A CN 2011104131319A CN 201110413131 A CN201110413131 A CN 201110413131A CN 103158198 A CN103158198 A CN 103158198A
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Abstract
The invention relates to a beam plate prefabricated by prestressed concrete, in particular to a big hollow beam plate prefabricated by the prestressed concrete. A manufacturing method of the big hollow beam plate slope prefabricated by the prestressed concrete comprises a pre-embedded steel plate. The method comprises the following steps: step1, longitudinal slope and transverse slope of the beam plate are calculated; step2, the standard of iron sheets is confirmed; step3, a mold for adjusting the slope is manufactured; and step4, the iron sheets and iron pieces are welded. The method is capable of meeting the requirement that the longitudinal slope and the transverse slope of the beam plate are adjusted through the pre-embedded steel plate, and smooth installation of the beam plate is ensured.
Description
Technical field
The present invention relates to the prestressed concrete precast beam, relate in particular to the prefabricated large hollow beam slab of prestressed concrete.
Background technology
At present, most of prestressed concrete prefabricated case beam beam slab bearings place all adopts pre-embedded steel slab to stretch out the way of beam slab bottom surface, adopt the construction technology of post stretching due to the case beam, during stretch-draw, beam slab self is produced extruding, be not subjected to displacement between beam slab and bearing, the way of like this embedded iron parts at bearing place at the bottom of the case beam being stretched out at the bottom of the case beam can not produce any impact.And the applicant is in Sri Lanka airport expressway CKE project, bridge beam slab adopts the large hollow plate of pre-tensioned prestressing, what the pre-embedded steel slab at this beam slab bearing place adopted is the way of outstanding beam slab bottom surface 1cm, carry out the construction of the large hollow beam slab of prestressed concrete owing to adopting pre-tensioning system, cause the steel plate of beam slab outstanding beam slab bottom surface when putting will touch the placenta bottom surface, because the displacement of putting a generation can produce very large endogenetic process to beam slab itself, may cause crack or beam slab bottom surface fracture.
The applicant has carried out suitable modification to the beam slab bearing place pre-embedded steel slab arrangement form that has designed, the steel plate income beam slab base plate interior of beam slab bottom surface will be given prominence to originally, adopt the way that flushes with beam slab base plate bottom surface, in beam slab inside, the longitudinal and transverse slope of beam slab is adjusted, and improve the bent cap end face absolute altitude of every bridge, the whole 2cm that improves.By the modification to design, amended steel plate pre-buried form has satisfied the designing requirement that beam slab adopts pre-tensioning system to construct, but is faced with the problem how ironware installs to adjust the longitudinal and transverse slope of beam slab.Initial consideration adopts wooden unit processing wooden model piece pad to adjust the longitudinal and transverse slope of beam slab below ironware, because the wooden model piece of processing is thinner, the processing of wooden model piece is more difficult, quantity is many again, and the slope in length and breadth of every bridge is all inconsistent, caused great waste, and the wooden model piece can't fix when the beam slab Prefabrication, causes guaranteeing the accuracy of pre-embedded steel slab installation site.
Summary of the invention
The present invention is intended to address the aforementioned drawbacks, and provides a kind of prestressed concrete prefabricated large hollow beam slab gradient preparation method.The present invention has satisfied beam slab and has adjusted the beam slab requirement on slope in length and breadth by pre-embedded steel slab, has also guaranteed the smooth installation of beam slab.
For addressing the above problem, the prefabricated large hollow beam slab gradient preparation method of a kind of prestressed concrete, it comprises a pre-embedded steel slab, the method comprises the following steps:
Step 1, the calculating on beam slab longitudinal and transverse slope
Calculate the longitudinal and transverse slope of every block of plate according to the designing requirement on the longitudinal and transverse slope of every bridge, calculate the adjustment height of embedded iron parts vertical, horizontal;
Step 2, the determining of iron plate specification
According to the adjustment height of the vertical, horizontal of steel plate, determine the needed height of iron plate;
Step 3 is adjusted the making of gradient mould
Select one than the iron plate horizontal positioned of pre-embedded steel slab each limit one large 10cm of side as the platform of adjusting gradient mould, and draw each sideline, limit of pre-embedded steel slab thereon, afterwards according to pre-embedded steel slab in length and breadth to adjusting height, determine the particular location that 4 reinforcing bars weld and calculate respectively 4 reinforcing bars length separately by the steel plate sideline, 4 reinforcing bars of Site Welding are as the mould of adjusting the steel plate vertical and horizontal gradient afterwards;
Step 4, the welding of iron plate and ironware
After the mould of the adjustment gradient welds, pre-embedded steel slab is placed on the top of mould according to the position, sideline of pre-embedded steel slab, and align with the sideline, afterwards iron plate is placed on the surrounding of pre-embedded steel slab, adopt successively the method for spot welding to carry out the welding of iron plate and pre-embedded steel slab, after having welded, steel plate is inverted, place, bottom surface with pre-embedded steel slab that iron plate is inboard carries out spot-welded on equally.
The present invention adopts the thick iron plate of pre-embedded steel slab surrounding welding 2mm to carry out the beam slab way of slope adjustment in length and breadth.By the height of adjusting iron plate, the slope in length and breadth of beam slab is adjusted, after adjusting in length and breadth the slope according to the slope requirement of every bridge designing requirement, iron plate is welded on the surrounding of pre-embedded steel slab, this way has satisfied beam slab and has adjusted the beam slab requirement on slope in length and breadth by pre-embedded steel slab, has also guaranteed the smooth installation of beam slab.Method of the present invention is simple and convenient, be easy to construction; Guarantee the accuracy of the pre-buried position of pre-embedded steel slab, beam slab bearing place, and successfully completed the installation of each piece beam slab; Reduce the Mould Machining difficulty, saved the Mould Machining cost.
The specific embodiment
The prefabricated large hollow beam slab gradient preparation method of a kind of prestressed concrete, it comprises a pre-embedded steel slab, the method comprises the following steps:
Step 1, the calculating on longitudinal and transverse slope
Calculate the longitudinal and transverse slope of every block of plate according to the designing requirement on the longitudinal and transverse slope of every bridge, calculate the adjustment height of embedded iron parts vertical, horizontal;
For example: the length and width of embedded iron parts are thick, and to be of a size of 430*390*30mm(large along the vertical ironware size of beam slab, little along the horizontal ironware size of beam slab), the beam slab horizontal wall inscription is 2.5%, the beam slab longitudinal gradient is 3.0%;
Horizontal adjustment is highly 390*2.5%=9.75mm, and adjusting longitudinally is highly 430*3%=12.9mm, and the adjustment of four angle points of embedded iron parts highly is respectively 0 mm, 12.9 mm, 22.65mm, 9,75mm.
Step 2, the determining of iron plate specification
According to the adjustment height of the vertical, horizontal of steel plate, determine the needed height of iron plate;
Highly be respectively 0 mm, 12.9 mm, 22.65mm, 9,75mm according to the adjustment of four angle points of ironware in step 1;
Step 3 is adjusted the making of gradient mould
Select one than the iron plate horizontal positioned of pre-embedded steel slab each limit one large 10cm of side as the platform of adjusting gradient mould, and draw each sideline, limit of pre-embedded steel slab thereon, afterwards according to pre-embedded steel slab in length and breadth to adjusting height, determine the particular location that four reinforcing bars weld and calculate respectively 4 reinforcing bars length separately by the steel plate sideline, four reinforcing bars of Site Welding are as the mould of adjusting the steel plate vertical and horizontal gradient afterwards;
Step 4, the welding of iron plate and ironware
After the mould of the adjustment gradient welds, pre-embedded steel slab is placed on the top of mould according to the position, sideline of pre-embedded steel slab, and align with the sideline, afterwards iron plate is placed on the surrounding of pre-embedded steel slab, adopt successively the method for spot welding to carry out the welding of iron plate and pre-embedded steel slab, after having welded, steel plate is inverted, place, bottom surface with pre-embedded steel slab that iron plate is inboard carries out spot-welded on equally.
Claims (1)
1. prefabricated large hollow beam slab gradient preparation method of prestressed concrete, it comprises a pre-embedded steel slab, it is characterized in that, the method comprises the following steps:
Step 1, the calculating on beam slab longitudinal and transverse slope
Calculate the longitudinal and transverse slope of every beam slab according to the designing requirement on the longitudinal and transverse slope of every bridge, calculate the adjustment height of embedded iron parts vertical, horizontal;
Step 2, the determining of iron plate specification
According to the adjustment height of the vertical, horizontal of steel plate, determine the needed height of iron plate;
Step 3 is adjusted the making of gradient mould
Select one than the iron plate horizontal positioned of pre-embedded steel slab each limit one large 10cm of side as the platform of adjusting gradient mould, and draw each sideline, limit of pre-embedded steel slab thereon, afterwards according to pre-embedded steel slab in length and breadth to adjusting height, determine the particular location that 4 reinforcing bars weld and calculate respectively 4 reinforcing bars length separately by the steel plate sideline, 4 reinforcing bars of Site Welding are as the mould of adjusting the steel plate vertical and horizontal gradient afterwards;
Step 4, the welding of iron plate and ironware
After the mould of the adjustment gradient welds, pre-embedded steel slab is placed on the top of mould according to the position, sideline of pre-embedded steel slab, and align with the sideline, afterwards iron plate is placed on the surrounding of pre-embedded steel slab, adopt successively the method for spot welding to carry out the welding of iron plate and pre-embedded steel slab, after having welded, steel plate is inverted, place, bottom surface with pre-embedded steel slab that iron plate is inboard carries out spot-welded on equally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104131319A CN103158198A (en) | 2011-12-13 | 2011-12-13 | Manufacturing method of big hollow beam plate slope prefabricated by prestressed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104131319A CN103158198A (en) | 2011-12-13 | 2011-12-13 | Manufacturing method of big hollow beam plate slope prefabricated by prestressed concrete |
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| Publication Number | Publication Date |
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| CN103158198A true CN103158198A (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104131319A Pending CN103158198A (en) | 2011-12-13 | 2011-12-13 | Manufacturing method of big hollow beam plate slope prefabricated by prestressed concrete |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006523A (en) * | 1974-01-22 | 1977-02-08 | Mauquoy Jean Baptiste | Method of producing a pre-stressed beam of steel and concrete |
| CN1676295A (en) * | 2004-03-29 | 2005-10-05 | 上海市城市建设设计研究院 | Precast segmental beam for overhead road box girder, and its manufacturing method and formed box girder |
| CN2823315Y (en) * | 2005-05-10 | 2006-10-04 | 上海市城市建设设计研究院 | Wedge bottom plate for bridge pad |
| CN201560432U (en) * | 2009-11-17 | 2010-08-25 | 武汉一冶钢结构有限责任公司 | Elevation and levelness adjusting device of pre-embedded steel sheet |
-
2011
- 2011-12-13 CN CN2011104131319A patent/CN103158198A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006523A (en) * | 1974-01-22 | 1977-02-08 | Mauquoy Jean Baptiste | Method of producing a pre-stressed beam of steel and concrete |
| CN1676295A (en) * | 2004-03-29 | 2005-10-05 | 上海市城市建设设计研究院 | Precast segmental beam for overhead road box girder, and its manufacturing method and formed box girder |
| CN2823315Y (en) * | 2005-05-10 | 2006-10-04 | 上海市城市建设设计研究院 | Wedge bottom plate for bridge pad |
| CN201560432U (en) * | 2009-11-17 | 2010-08-25 | 武汉一冶钢结构有限责任公司 | Elevation and levelness adjusting device of pre-embedded steel sheet |
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Application publication date: 20130619 |