CN105269664A - Installation technique for segment box beam manufacturing formwork - Google Patents
Installation technique for segment box beam manufacturing formwork Download PDFInfo
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- CN105269664A CN105269664A CN201410352681.8A CN201410352681A CN105269664A CN 105269664 A CN105269664 A CN 105269664A CN 201410352681 A CN201410352681 A CN 201410352681A CN 105269664 A CN105269664 A CN 105269664A
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Abstract
The invention discloses an installation technique for a segment box beam manufacturing formwork. The installation technique comprises the following steps of (1) installation of fixed end formwork bodies; (2) installation of a bottom formwork body; (3) installation of lateral formwork bodies; (4) installation of an internal formwork body; and (5) installation of a net framework body capable of being closed rapidly and easily. According to installation technique based on the technical scheme, rapid installation of a formwork prefabricated by integrating and matching a long line method with a short line method can be achieved, and streamlined production of segment box beams can be achieved; in addition, in the whole installation process, measurement is easy to control, the installation speed is high, the construction period is shortened, the errors caused in the segment box beam manufacturing process are greatly reduced, the rate of all manufactured finished segment box beams is increased, and thus the quality of the manufactured segment box beams is improved.
Description
Technical field
The present invention relates to the assembled Construction Technique of Box of a kind of precast segment, particularly a kind of mounting process of template for manufacturing sectional box girders.
Background technology
At present long line method is generally had to mate prefabricated to the method for prefabricating of section box girder and short line casting coupling is prefabricated; The prefabricated 1. geometry that has the following advantages of its long line method coupling is easily arranged and is controlled, simple structure, and construction production process ratio is easier to control; 2., after the demoulding, immediately beam section need not be transported to seasoning ground; 3. deviation can not be accumulated, and can be adjusted in time by next block section for the deviation that clamp dog section is formed, but also can mate prefabricated by multiple spot simultaneously, construction speed be fast; The method also has following deficiency: floor space is large, pedestal must be built on firm basis, curved bridge also needs to form required curvature, and build, the equipment such as health is all portable.
Short line casting coupling is prefabricated refers to that building of each sections is all carried out in same template, its one end is a fixed die, and the other end is a sections of first building, the length of template is only the length of a sections, template does not move, and beam Duan Ze is transported to after moving to matched position by casting position and deposits Liang Chang.It is less that it has 1. floor space; 2. form pipelining, speed of application is high; 3. be applicable to sections Change of types more, template is fallen by advantages such as engineering demands more frequently, simultaneously Shortcomings in the following areas: template and placing installation are all fixing, can obtain horizontal curve, vertical curve and different superelevation; To instrument requirements very strict (require the necessary point-device placement of matching section, thus need accurate measuring instrument equipment); Need the Adjustment precision of higher beam section, accurate measurement and control method.
If length collimation method can be carried out with the use of, realize long line short line casting coupling prefabricated, whole prefabricated efficiency will be provided greatly.
Long line short line casting coupling precasting process principle is: arrange the long and short line pedestal of some beam precasts by bridge in pre-fabricated factory across footpath combination requirement, case beam is divided into some short segments, pier jacking block (first, last block) often across case beam is prefabricated on short-term pedestal, the construction technology that other section box girders are prefabricated piecemeal successively on long-line pedestal.
The present invention coordinates long line short line casting to mate prefabricated case beam to make the mounting process of template, to reach very high yield rate by providing a kind of.
Summary of the invention
The present invention is directed to above-mentioned case beam make existing for deficiency, and provide a kind of can in conjunction with long line, short-term coupling method for prefabricating advantage, realize the mounting process of the template for manufacturing sectional box girders of section box girder production line balance.
In order to achieve the above object, the technical solution used in the present invention:
A mounting process for template for manufacturing sectional box girders, this mounting process comprises the following steps:
(1) stiff end mould is installed, and end mould die face and to be poured section of axis is in 90 °, and at vertical and horizontal plane, guarantee that its end face absolute altitude unanimously, end face line is in level;
(2) bed die is installed, and the axis of bed die coincides with measurement tower line, and relative elevation control errors is within 2mm;
(3) side form is installed, and side form is adjusted to the right place by the Adjustable bracing bar on support, and top mouth and bottom are passed through drawing spiral shell _ _ pole pair to draw; Side form support is connected with precast pedestal by pre-embedded bolt, and bolt and support welding are fixed after location by side form support;
(4) internal mold is installed, and internal mold is moved into framework of steel reinforcement inner chamber, is launched to form box girder inner formwork by internal mold by the hydraulic system be arranged on internal mould supporter, then regulates rod-adjurstable support, fixing internal mold;
(5) fast easy-to-closing in net stencil is installed, and has the beam section of secondary casting concrete, and secondary casting position adopts fast easy-to-closing in net stencil, is directly formed and builds interface without the need to the secondary of dabbing process; This closing in net stencil is just installed in framework of steel reinforcement in tie with reinforcing bar process.
Soft rubber grouting bar is all installed in the position that described stiff end mould and internal mold contact with side form, makes it under the extruding of internal mold, make case beam end seal.
When in described step (3), side form is installed, side form support is connected with the built-in fitting on precast pedestal must be solid and reliable, and all gaps are all filled with epoxy resin mortar; Side form is seamless connection with side form support articulated position; Side form arc section and bed die joint are smoothly transition, and seam is tight; During jacking side form first by upper chamfering and matching beam and stiff end mould relevant position to good, be adjacent to, put on swivel pin and first-class limiting plate, then jacking side form steadily rises; When side form jacking is to from should by the simultaneously jacking of both sides side form during matching beam 10 ~ 20mm; After side form has adjusted, remeasure the relative position of matching beam and stiff end intermode, guarantee errorless after carry out next procedure construction again; Check between side form and bed die simultaneously, side form and stiff end intermode, bed die seam, between bed die and matching beam, whether gap width meets the demands, and with glass cement by joint seal, this glass cement must be smeared smooth.
Described step (4) internal mold is installed and is entered mould at framework of steel reinforcement and carry out after web cantilever bundle bellows and anchor plate being fixed, and the garbage-cleaning that internal mold must be hidden on the bed die of scope is clean.
When described step (4) internal mold is installed, internal mold seam all uses foam stuff up a crack, to tighten, if having the position of faulting of slab ends by adding gad adjustment by the first-class connecting bolt of design attitude; During jacking internal mold top plate, prevent top from too much causing stiff end moding shape.
When fast easy-to-closing in net stencil in described step (5) is installed in framework of steel reinforcement, strengthened to the scaffold tubes arranged by vertical and level, and after framework of steel reinforcement hangs mould, utilize scaffold tubes to be reinforced support by two coxostermum closing in net stencil.
The present invention obtained according to technique scheme its can make to gather long line, short line casting mates prefabricated template Fast Installation, make the production of section box girder can streamlined, and whole installation process measurement is easy to control, installation rate is fast, reduction of erection time, greatly reduce the error of manufacturing sectional box girders process, improve the yield rate of whole manufacturing sectional box girders, thus improve the quality making section box girder.
Accompanying drawing illustrates:
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of section box girder in the present invention.
Fig. 2 is process chart of the present invention.
Detailed description of the invention:
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Section box girder in the present invention structure as shown in Figure 1, it is made up of stiff end mould, bed die, side form, internal mold and framework of steel reinforcement, primary structure principle is fixed by side form and bed die respectively by outside and bottom by stiff end mould, interior _ _ portion is mounted with framework of steel reinforcement, and in framework of steel reinforcement inner chamber, settles internal mold to form the frame structure of section box girder; The arc section of side form connects with bed die simultaneously, and joint transition is smooth-going.
Based on above-mentioned principle, in order to make, the production process of section box girder becomes simply, yield rate is high, and of the present invention realization adopts following detailed protocol (as Fig. 2):
Step one: stiff end mould is installed
Whole model sheetinstallat is with stiff end mould 1 for controlling benchmark, must ensure during vertical stiff end mould: end mould die face and to be poured section of axis in 90 °, and at vertical and horizontal plane; Guarantee its end face absolute altitude consistent (end face line is in level).
20mm × 20mm soft rubber grouting bar is all installed in the position that stiff end mould 1 and internal mold 10 contact with side form 3, and it makes case beam end seal under the extruding of internal mold 10.Cleaned out by cement mortar on grouting bar in time after each dismounting internal mold, and check the fine status of grouting bar, damaged grouting bar must be changed in time.
Step 2: bed die installs due to all section box girders that all press rectangle prefabricated, so bottom die of box-beam 2 is provided with camber and vertical curve, the axis of bed die with measure tower line and coincide, while relative elevation control errors within 2mm, axis is within 1mm.
Step 3: side form is installed
The installation particular importance of whole side form, its install the good ring of quality will have influence on the Forming Quality of whole section box girder, side form 3 is adjusted to the right place by the Adjustable bracing bar 6 on side form support 5, top mouth and bottom by Screw arbor with nut at both-ends 7,9 to drawing.
Side form support 5 is connected with precast pedestal by pre-embedded bolt 8, and bolt and support welding are fixed after location by side form support.
Side form is installed to be needed to reach following technical essential:
(1) be connected with the built-in fitting on precast pedestal must be solid and reliable for side form support, and all gaps are all filled with epoxy resin mortar.
(2) side form and side form support articulated position require seamless, and limiting plate bolt must be tightened, and produce displacement to prevent side form in casting concrete process.
(3) the necessary transition of side form arc section and bed die joint is smooth-going, and seam is tight.
(4) during jacking side form first by upper chamfering and matching beam and stiff end mould relevant position to good, be adjacent to, put on swivel pin and first-class limiting plate, then jacking side form steadily rises.When side form simultaneously jacking in both sides should be contacted situation by special messenger in side form top view side form and stiff end mould and matching beam to from during matching beam 10 ~ 20mm by side form jacking, prevent the matching beam off normal caused in jacking side form process.
(5), after side form has adjusted, the relative position of matching beam and stiff end intermode should be remeasured, guarantee errorless after carry out next procedure construction again.Check between side form and bed die simultaneously, side form and stiff end intermode, bed die seam, between bed die and matching beam, whether gap width meets the demands, and with glass cement by joint seal (glass cement must be smeared smooth).
Step 4: internal mold is installed according to mounting structure above, is finally the installation of internal mold 10.Internal mold is divided into calibrated bolck and special-shaped block, needs to combine according to each precast segment.Internal mold 10 is primarily of gusset composition under gusset, internal mold web, internal mold on internal mold top plate, internal mold side top board, internal mold, with bolts between each template.Whole inner formwork system is fixed in interior mould trolley, can by hydraulic system complete vertical direction flexible and laterally open, closed, and to support with rod-adjurstable.Interior mould trolley moves is drawn by 5t hoist engine.
Whole internal mold 10 is arranged on framework of steel reinforcement and enters mould and after web cantilever bundle bellows and anchor plate being fixed, the garbage-cleaning hidden on the bed die of scope by internal mold 10 is clean, then internal mold is moved into framework of steel reinforcement inner chamber, by the hydraulic system be arranged on internal mould supporter 4, internal mold is launched to form box girder inner formwork, then regulate rod-adjurstable support, fixing internal mold.Notice during installation that all internal mold seams all use foam stuff up a crack, and strictly tighten by the first-class connecting bolt of design attitude.There is the position of faulting of slab ends can add gad adjustment.
During last jacking internal mold top plate, the contact situation of internal mold and stiff end mould must be kept a close eye on, prevent top from too much causing stiff end moding shape.If excessive distortion occurs at this position, when removing internal mold, case back plate shear connector will be caused to damage.
Just the making template of section box girder can be obtained according to above-mentioned technical scheme, when the time comes, as long as pour into the concrete of corresponding requirements, more just section box girder can be obtained easily according to corresponding operating process.
Step 5: if fast easy-to-closing in net stencil installs the beam section having secondary casting concrete, secondary casting position adopts fast easy-to-closing in net stencil, is directly formed and builds interface without the need to the secondary of dabbing process.Fast easy-to-closing in net stencil succeeds in developing the eighties and a kind of new type formwork material be day by day widely adopted, it is for raw material with thin-type heat galvanized steel plain sheet (thick 0.35mm), through being processed into the template of the close rib cage of unidirectional U-shaped and unidirectional stereoscopic grid, have by lateral pressure little (being equivalent to 60% of common templates), can directly observe concreting process, from heavy and light, easy for installation, be convenient to wear the advantage such as muscle, interface shearing-resistance function admirable.
Closing in net stencil is just installed in framework of steel reinforcement in tie with reinforcing bar process.Arrange scaffold tubes by vertical 30cm, level to 60cm to strengthen.After framework of steel reinforcement hangs mould, scaffold tubes is utilized to be reinforced support by two coxostermum closing in net stencil.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (6)
1. a mounting process for template for manufacturing sectional box girders, is characterized in that, this mounting process comprises the following steps:
(1) stiff end mould is installed, and end mould die face and to be poured section of axis is in 90 °, and at vertical and horizontal plane, guarantee that its end face absolute altitude unanimously, end face line is in level;
(2) bed die is installed, and the axis of bed die coincides with measurement tower line, and relative elevation control errors is within 2mm;
(3) side form install, side form is adjusted to the right place by the Adjustable bracing bar on support, top mouth and bottom by Screw arbor with nut at both-ends to drawing; Side form support is connected with precast pedestal by pre-embedded bolt, and bolt and support welding are fixed after location by side form support;
(4) internal mold is installed, and internal mold is moved into framework of steel reinforcement inner chamber, is launched to form box girder inner formwork by internal mold by the hydraulic system be arranged on internal mould supporter, then regulates rod-adjurstable support, fixing internal mold;
(5) fast easy-to-closing in net stencil is installed, and has the beam section of secondary casting concrete, and secondary casting position adopts fast easy-to-closing in net stencil, is directly formed and builds interface without the need to the secondary of dabbing process; This closing in net stencil is just installed in framework of steel reinforcement in tie with reinforcing bar process.
2. the mounting process of a kind of template for manufacturing sectional box girders according to claim 1, is characterized in that, soft rubber grouting bar is all installed in the position that described stiff end mould and internal mold contact with side form, makes it under the extruding of internal mold, make case beam end seal.
3. the mounting process of a kind of template for manufacturing sectional box girders according to claim 1, it is characterized in that, when in described step (3), side form is installed, side form support is connected with the built-in fitting on precast pedestal must be solid and reliable, and all gaps are all filled with epoxy resin mortar; Side form is seamless connection with side form support articulated position; Side form arc section and bed die joint are smoothly transition, and seam is tight; During jacking side form first by upper chamfering and matching beam and stiff end mould relevant position to good, be adjacent to, put on swivel pin and first-class limiting plate, then jacking side form steadily rises; When side form jacking is to from should by the simultaneously jacking of both sides side form during matching beam 10 ~ 20mm; After side form has adjusted, remeasure the relative position of matching beam and stiff end intermode, guarantee errorless after carry out next procedure construction again; Check between side form and bed die simultaneously, side form and stiff end intermode, bed die seam, between bed die and matching beam, whether gap width meets the demands, and with glass cement by joint seal, this glass cement must be smeared smooth.
4. the mounting process of a kind of template for manufacturing sectional box girders according to claim 1, it is characterized in that, described step (4) internal mold is installed and is entered mould at framework of steel reinforcement and carry out after web cantilever bundle bellows and anchor plate being fixed, and the garbage-cleaning that internal mold must be hidden on the bed die of scope is clean.
5. the mounting process of a kind of template for manufacturing sectional box girders according to claim 1 or 4, it is characterized in that, when described step (4) internal mold is installed, internal mold seam all uses foam stuff up a crack, to tighten, if having the position of faulting of slab ends by adding gad adjustment by the first-class connecting bolt of design attitude; During jacking internal mold top plate, prevent top from too much causing stiff end moding shape.
6. the mounting process of a kind of template for manufacturing sectional box girders according to claim 1, it is characterized in that, when fast easy-to-closing in net stencil in described step (5) is installed in framework of steel reinforcement, strengthened to the scaffold tubes arranged by vertical and level, and after framework of steel reinforcement hangs mould, utilize scaffold tubes to be reinforced support by two coxostermum closing in net stencil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410352681.8A CN105269664A (en) | 2014-07-24 | 2014-07-24 | Installation technique for segment box beam manufacturing formwork |
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| CN201410352681.8A CN105269664A (en) | 2014-07-24 | 2014-07-24 | Installation technique for segment box beam manufacturing formwork |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107791368A (en) * | 2017-11-03 | 2018-03-13 | 福州大学 | Fixed integral prefabricated box girder formwork structure and its construction method |
| CN108098979A (en) * | 2017-12-13 | 2018-06-01 | 中国铁建大桥工程局集团有限公司 | A kind of PK sections concrete box girder precast segment template |
| CN109290739A (en) * | 2018-08-15 | 2019-02-01 | 中铁宝桥集团有限公司 | A kind of space curve head tower segment manufacturing process |
| CN110497511A (en) * | 2019-09-04 | 2019-11-26 | 成都城投城建科技有限公司 | A kind of mold and method for prefabricating suitable for long lines matching method production assembled under-traverse tunnel frame |
| CN111844428A (en) * | 2020-07-07 | 2020-10-30 | 中交二航局第四工程有限公司 | Prefabrication construction method for twisted section box girder |
| CN113832828A (en) * | 2021-09-30 | 2021-12-24 | 中铁十四局集团第一工程发展有限公司 | Cast-in-place box girder side form back rib and bracing sleeve pipe support system |
| CN114454310A (en) * | 2022-01-04 | 2022-05-10 | 中交第二航务工程局有限公司 | Matching manufacturing method for section beam prefabricated end formwork panel based on non-matching beam |
-
2014
- 2014-07-24 CN CN201410352681.8A patent/CN105269664A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107791368A (en) * | 2017-11-03 | 2018-03-13 | 福州大学 | Fixed integral prefabricated box girder formwork structure and its construction method |
| CN108098979A (en) * | 2017-12-13 | 2018-06-01 | 中国铁建大桥工程局集团有限公司 | A kind of PK sections concrete box girder precast segment template |
| CN109290739A (en) * | 2018-08-15 | 2019-02-01 | 中铁宝桥集团有限公司 | A kind of space curve head tower segment manufacturing process |
| CN110497511A (en) * | 2019-09-04 | 2019-11-26 | 成都城投城建科技有限公司 | A kind of mold and method for prefabricating suitable for long lines matching method production assembled under-traverse tunnel frame |
| CN111844428A (en) * | 2020-07-07 | 2020-10-30 | 中交二航局第四工程有限公司 | Prefabrication construction method for twisted section box girder |
| CN111844428B (en) * | 2020-07-07 | 2021-09-14 | 中交二航局第四工程有限公司 | Prefabrication construction method for twisted section box girder |
| CN113832828A (en) * | 2021-09-30 | 2021-12-24 | 中铁十四局集团第一工程发展有限公司 | Cast-in-place box girder side form back rib and bracing sleeve pipe support system |
| CN114454310A (en) * | 2022-01-04 | 2022-05-10 | 中交第二航务工程局有限公司 | Matching manufacturing method for section beam prefabricated end formwork panel based on non-matching beam |
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Application publication date: 20160127 |