CN105856415A - Prefabricated box beam bottom wedge block dry sand adjustment construction method - Google Patents
Prefabricated box beam bottom wedge block dry sand adjustment construction method Download PDFInfo
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- CN105856415A CN105856415A CN201510031869.7A CN201510031869A CN105856415A CN 105856415 A CN105856415 A CN 105856415A CN 201510031869 A CN201510031869 A CN 201510031869A CN 105856415 A CN105856415 A CN 105856415A
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- voussoir
- dry sand
- prefabricated
- groove
- pedestal
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Abstract
The invention relates to a prefabricated box beam bottom wedge block dry sand adjustment construction method. The prefabricated box beam bottom wedge block dry sand adjustment construction method comprises the steps that 1, when a box beam prefabricated pedestal is manufactured, wedge block grooves are reserved in the two ends, where box beam wedge blocks are prefabricated, of the pedestal, the length and the width of the wedge block grooves are equal to the length and the width of the wedge blocks correspondingly, and the depth of the wedge block grooves is larger than the maximum design height of the wedge blocks; 2, chalk lines are drawn on the inner sides of the wedge block grooves according to the size of the prefabricated box beam wedge blocks, dry sand is laid below the chalk lines of the interiors of the wedge block grooves, steel plates are laid on the dry sand, the volume inside the wedge block grooves is completely matched with that of the wedge blocks after the dry sand and the steel plates are laid, and the steel plates and the grooves are fixed through double-faced adhesive tape; and 3, formworks and rebars are installed, and prefabricated box beam concrete pouring is conducted.
Description
Technical field
The invention belongs to technical field of bridge construction, be specifically related to a kind of prefabricated for different bridges, transverse and longitudinal slope small box girder across footpath
Construction technology.
Background technology
In highway construction, the construction technology of simple-supported thencontinuous box beam is used by many bar high-grade highways, because no matter
Stress, prefabricated, attractive in appearance angularly considering, box-beam structure all occupies the biggest advantage.The transverse and longitudinal gradient of bridge is by being located at case
Voussoir at the bottom of Liang Liang is adjusted, although therefore voussoir component at the bottom of beam is little, but plays considerable effect.Box beam is typically
On the beam making bench of beam field prefabricated, owing to prefabricated case beam quantity is more, and at the bottom of prefabricated case beam beam, voussoir bottom sloping is not quite similar, case
In beam prefabricated construction, if for every kind of box beam with the different voussoir gradient, all building corresponding precast pedestal, will very without
Ji, therefore, the box beam how utilizing same precast pedestal to precast different bottom sloping voussoir when prefabricated case beam is prefabricated be one urgently
Problem to be solved.
Summary of the invention
It is an object of the invention to provide a kind of Construction of Precast Box Beam technology being provided with voussoir at the bottom of beam, utilize same caisson platform precasting to go out not
With the prefabricated case beam of bottom sloping voussoir, thus reduce the quantity of precast pedestal, improve the economic benefit of project.
Technical scheme is as follows:
Voussoir dry sand regulation construction method at the bottom of a kind of prefabricated case beam beam, it is characterised in that:
(1) when making prefabricated box-beam pedestal, at the prefabricated case beam voussoir of pedestal two ends, reserved voussoir groove, described voussoir
Groove inner wall uses angle steel to make, and the length and width of voussoir groove is equal with the length and width of voussoir respectively, voussoir groove
The degree of depth is more than voussoir design maximum height；
(2) according to the size of prefabricated case beam voussoir, inside voussoir groove, the line of ink marker is drawn, according to line of ink marker position in voussoir groove
Put laying dry sand and on dry sand, lay steel plate, making the volume in laying dry sand and steel plate back wedge groove fit like a glove with voussoir；
(3) double faced adhesive tape is used to be fixed with groove by steel plate；
(4) according to prefabricated case beam length dimension, precast pedestal releases beam body contour line with ink fountain, pedestal is laid steel
Plate, as the lower bolster of precast beam base plate, is fitted using double faced adhesive tape between base plate lower bolster and pedestal, it is to avoid spillage at voussoir
Produce pitted skin；Then prefabricated case beam reinforcing bar, and base plate cope match-plate pattern, web templates, roof plate template are installed；
(5) prefabricated case beam concrete is poured；
(6) carrying out health preserving in time after the complete final set of concreting, concrete strength carries out form removal after reaching form removal requirement again,
During form removal, concrete strength is not less than 2.5MPa.
When said method is embodied as, in prefabricated case beam base plate, one opening can be set for template and voussoir correspondence position, pour coagulation
First carrying out underplate concrete during soil to pour, and vibrated in voussoir position by base plate cope match-plate pattern opening part above voussoir, base plate waters
After having built, use a collapsible form to be closed by opening part, then pour prefabricated case beam web and concrete roof.
During casting concrete, stratified continuous pouring, every layer thickness is not more than 30cm；First pouring voussoir position, voussoir sentences Φ
30 vibrating spears vibrate, and insert lower-layer concrete 5～10cm；Vibrate to each position of vibrating to this position concrete stopping,
Till no longer effervescent, surface present smooth bleeding.
The present invention uses the volume in dry sand adjusting wedge groove, with same pedestal can prefabricated different horizontal, the box beams of top rake, subtract
Few pedestal machining kinds.Constructing operation of the present invention flexibly, simply, draw materials conveniently, and use cost is low by the dry sand used, construction
Efficiency is high, has reached raising efficiency, cost-effective purpose.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of prefabricated box-beam pedestal；
Fig. 2 is the side sectional view of prefabricated case beam；
Fig. 3 is I-I sectional view in Fig. 2；
Fig. 4 is II-II sectional view in Fig. 2.
Detailed description of the invention
Below in conjunction with drawings and Examples, the method for the present invention is illustrated.
In a concrete Application Example, certain project bridge superstructure uses 20m, 25m prefabricated case beam, prefabricated case beam substantially
Amount to 609, wherein 20m prefabricated case beam 251,25m prefabricated case beam 358.Deck transverse slope utilizes voussoir at the bottom of beam to carry out
Regulation.The design maximum height of voussoir at the bottom of all beams is 4cm；The vertical and horizontal gradient of voussoir has a variety of, but the plane of all voussoirs
Size only has two kinds.The method using the present invention, precast pedestal can only point two kinds of making.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, when making prefabricated box-beam pedestal 1, at pedestal 1 two ends prefabricated case beam voussoir
Place, reserved voussoir groove 2, described voussoir groove 2 inwall uses angle steel 3 to make.The table top coagulation of prefabricated box-beam pedestal 1
Soil pours and forms, when pouring table top concrete, at four pre-buried angle steel of wall 3 of reserved voussoir groove as the inwall of voussoir groove,
Embedded bar 4 below angle steel, weld angle steel 3 with fixing angle steel with embedded bar 4.The length and width of voussoir groove 2 is divided
The most equal with the length and width of voussoir, the degree of depth of voussoir groove is more than voussoir design maximum height.
In the present embodiment, the design maximum height of voussoir at the bottom of beam is 4cm, the degree of depth of reserved voussoir groove, i.e. prefabricated box-beam platform
The table top of seat is 6cm to the distance of reserved voussoir groove floor, and reserved 2cm is as dry sand regulating course.
Prefabricated box-beam pedestal uses C25 reinforced concrete to pour, and width is prefabricated case beam bottom width, and pedestal both sides are along pedestal longitudinally paving
If channel-section steel 5, it is simple to prefabricated case beam.
Before prefabricated case beam concreting, first according to the size of prefabricated case beam voussoir, inside voussoir groove, draw the line of ink marker, at wedge
In block groove below line of ink marker position, lay dry sand and on dry sand, lay steel plate, in making laying dry sand and steel plate back wedge groove
Volume fits like a glove with voussoir.
When laying steel plate, first with level gauge, the dry sand in voussoir groove carried out relative relief measurement, and carries out the adjustment of dry sand surface,
Steel plate install after, then carry out height repetition measurement, if desired will again to dry sand surface adjust, with ensure concreting complete after wedge
Block surface meets design grade.
After steel plate installation, double faced adhesive tape is used to be fixed with groove by steel plate.
According to prefabricated case beam length dimension, precast pedestal releases beam body contour line with ink fountain, precast pedestal is laid steel plate
As the lower bolster of precast beam base plate, fit using double faced adhesive tape between end template and pedestal, it is to avoid at voussoir, spillage produces fiber crops
Face；Then prefabricated case beam reinforcing bar, and base plate cope match-plate pattern, web templates, roof plate template are installed.
After model sheetinstallat completes, start to pour prefabricated case beam concrete；Health preserving is carried out in time after the complete final set of concreting, mixed
Solidifying soil intensity carries out form removal after reaching form removal requirement again, and during form removal, concrete strength is not less than 2.5MPa.
When the present invention is embodied as, one opening, casting concrete can be set at prefabricated case beam base plate cope match-plate pattern and voussoir correspondence position
Time first carry out underplate concrete and pour, and above voussoir, vibrated in voussoir position by base plate cope match-plate pattern opening part, bottom slab concreting
After completing, use a collapsible form to be closed by opening part, then pour prefabricated case beam web and concrete roof.
During casting concrete, stratified continuous pouring, every layer thickness is not more than 30cm；First pouring voussoir position, voussoir sentences Φ
30 vibrating spears vibrate, and insert lower-layer concrete 5～10cm；Vibrate to each position of vibrating to this position concrete stopping,
Till no longer effervescent, surface present smooth bleeding.
Concrete uses spray wet curing, and conditioned time is no less than 7 days.
Form removal uses straddle truck cooperation manually to carry out, and after form removable, identifies box girder webs date, beam numbering etc. inside beam body.
Claims (3)
1. voussoir dry sand regulation construction method at the bottom of a prefabricated case beam beam, it is characterised in that:
(1) when making prefabricated box-beam pedestal, at the prefabricated case beam voussoir of pedestal two ends, reserved voussoir groove, described voussoir
Groove inner wall uses angle steel to make, and the length and width of voussoir groove is equal with the length and width of voussoir respectively, voussoir groove
The degree of depth is more than voussoir design maximum height；
(2) according to the size of prefabricated case beam voussoir, inside voussoir groove, the line of ink marker is drawn, according to line of ink marker position in voussoir groove
Put laying dry sand and on dry sand, lay steel plate, making the volume in laying dry sand and steel plate back wedge groove fit like a glove with voussoir；
(3) double faced adhesive tape is used to be fixed with groove by steel plate；
(4) according to prefabricated case beam length dimension, precast pedestal releases beam body contour line with ink fountain, pedestal is laid steel
Plate, as the lower bolster of precast beam base plate, is fitted using double faced adhesive tape between base plate lower bolster and pedestal, it is to avoid spillage at voussoir
Produce pitted skin；Then prefabricated case beam reinforcing bar, and base plate cope match-plate pattern, web templates, roof plate template are installed；
(5) prefabricated case beam concrete is poured；
(6) carrying out health preserving in time after the complete final set of concreting, concrete strength carries out form removal after reaching form removal requirement again,
During form removal, concrete strength is not less than 2.5MPa.
Voussoir dry sand regulation construction method at the bottom of prefabricated case beam beam the most according to claim 1, it is characterised in that: prefabricated
Box beam base plate cope match-plate pattern and voussoir correspondence position arrange an opening, first carry out underplate concrete and pour during casting concrete, and from wedge
Above block, vibrated in voussoir position by base plate cope match-plate pattern opening part, after bottom slab concreting completes, uses a collapsible form by opening part
Close, then pour prefabricated case beam web and concrete roof.
Voussoir dry sand regulation construction method at the bottom of prefabricated case beam beam the most according to claim 1, it is characterised in that: pour mixed
During solidifying soil, stratified continuous pouring, every layer thickness is not more than 30cm；First pouring voussoir position, voussoir is sentenced Φ 30 vibrating spear and is shaken
Smash, insert lower-layer concrete 5～10cm；Is vibrated in each position of vibrating to this position concrete stop sinking, no longer effervescent,
Till surface presents smooth bleeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031869.7A CN105856415B (en) | 2015-01-22 | 2015-01-22 | Prefabricated case beam beam bottom voussoir dry sand adjusts construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031869.7A CN105856415B (en) | 2015-01-22 | 2015-01-22 | Prefabricated case beam beam bottom voussoir dry sand adjusts construction method |
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|---|---|
| CN105856415A true CN105856415A (en) | 2016-08-17 |
| CN105856415B CN105856415B (en) | 2018-04-17 |
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| CN201510031869.7A Active CN105856415B (en) | 2015-01-22 | 2015-01-22 | Prefabricated case beam beam bottom voussoir dry sand adjusts construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107310025A (en) * | 2017-06-09 | 2017-11-03 | 武汉二航路桥特种工程有限责任公司 | The fabricated device and method for prefabricating of a kind of Prefabricated bar boots |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2710186A1 (en) * | 1977-03-09 | 1978-09-14 | Walter Hoff | Formwork gap bridging and sealing clamp - has sealing head on concrete side and rib clamped with wedges |
| JP2005344295A (en) * | 2004-05-31 | 2005-12-15 | Takashi Daiguuji | Method and structure for anchoring structural cable |
| CN201635393U (en) * | 2010-04-15 | 2010-11-17 | 中冶实久建设有限公司 | Movable bottom-formwork structure at precast beam slab bearer |
| CN202622994U (en) * | 2012-07-10 | 2012-12-26 | 重庆亲禾预制品有限公司 | Steel pedestal structure for pouring precast beam |
| CN204094940U (en) * | 2014-09-11 | 2015-01-14 | 葛洲坝集团第二工程有限公司 | Pre-embedded steel slab supertronic pedestal at the bottom of Precast T-Beam beam |
-
2015
- 2015-01-22 CN CN201510031869.7A patent/CN105856415B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2710186A1 (en) * | 1977-03-09 | 1978-09-14 | Walter Hoff | Formwork gap bridging and sealing clamp - has sealing head on concrete side and rib clamped with wedges |
| JP2005344295A (en) * | 2004-05-31 | 2005-12-15 | Takashi Daiguuji | Method and structure for anchoring structural cable |
| CN201635393U (en) * | 2010-04-15 | 2010-11-17 | 中冶实久建设有限公司 | Movable bottom-formwork structure at precast beam slab bearer |
| CN202622994U (en) * | 2012-07-10 | 2012-12-26 | 重庆亲禾预制品有限公司 | Steel pedestal structure for pouring precast beam |
| CN204094940U (en) * | 2014-09-11 | 2015-01-14 | 葛洲坝集团第二工程有限公司 | Pre-embedded steel slab supertronic pedestal at the bottom of Precast T-Beam beam |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107310025A (en) * | 2017-06-09 | 2017-11-03 | 武汉二航路桥特种工程有限责任公司 | The fabricated device and method for prefabricating of a kind of Prefabricated bar boots |
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| Publication number | Publication date |
|---|---|
| CN105856415B (en) | 2018-04-17 |
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