CN204298739U - Band cantilever Bailey beam cast-in-place formwork freely-supported door opening - Google Patents
Band cantilever Bailey beam cast-in-place formwork freely-supported door opening Download PDFInfo
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- CN204298739U CN204298739U CN201420588132.6U CN201420588132U CN204298739U CN 204298739 U CN204298739 U CN 204298739U CN 201420588132 U CN201420588132 U CN 201420588132U CN 204298739 U CN204298739 U CN 204298739U
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- bailey beam
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Abstract
Band cantilever Bailey beam cast-in-place formwork freely-supported door opening, door opening props up pier foundation built-in fitting and is fixed in door opening buttress concrete foundation, and door opening shellfish thunder buttress is fixed on door opening and props up on pier foundation built-in fitting; On door opening buttress, back timber is fixed on door opening shellfish thunder buttress, and three I-steel are welded into entirety side by side and are fixed on door opening buttress on back timber; Bailey beam is placed on I-steel, and Bailey beam comprises Bailey beam across a part, Bailey beam bracketed part; Square steel is laterally laid on Bailey beam top boom place, and described square steel and Bailey beam top boom intersection adopt the colligation one by one of 8# galvanized wire; Square steel installs bowl button support collet after laying, and bowl button support collet is U-shaped, tips upside down on square steel.The length of described Bailey beam bracketed part is the integral multiple of 0.75m, and is less than or equal to 0.35 times of Bailey beam across a part net span.This band cantilever Bailey beam cast-in-place formwork freely-supported door opening effectively can increase span, improves the utilization ratio of Bailey beam structural bearing capacity.
Description
Technical field
The utility model relates to a kind of cast-in-place structural falsework door opening, specifically, relates to a kind of cast-in-place structural falsework door opening of the band cantilever end using Bailey beam to set up.
Background technology
The construction door opening of the cast-in-place structural full framings such as current concrete box girder is mainly divided into two kinds, the first is the construction door opening adopting the shaped steel such as I-steel to set up, its buttress adopts concrete continuous footing and bowl button support composition, Oil pipeline adopts the shaped steel such as I-steel, and door opening span is generally 2 ~ 10m; The second is the construction door opening adopting the truss structures such as Bailey beam to set up, and its buttress adopts the composition such as concrete foundation and steel pipe column, and Oil pipeline adopts the truss structures such as Bailey beam, and door opening span is generally 10 ~ 30m.Above two kinds of construction door opening structure compositions, bearing capacity, spans etc. are all different, but its mechanical model is single span freely supported structure, and stressed sketch as shown in Figure 1.
As shown in Figure 1, when carrying out common freely-supported door opening Force Calculation, contrast to judge door opening bearing capacity with the mid span moment of Oil pipeline and bearing place shearing and structure allowable bearing, its mid span moment and bearing place shearing are respectively
with
According to structural mechanics knowledge, if door opening Oil pipeline is extended certain length γ L (L is door opening span, 0< γ <1) to two ends, its mechanical model as shown in Figure 2
Order
It can thus be appreciated that, as f (γ)=0, namely
time, above structure positive moment of span central point and bearing, hogging moment is equal, and moment of flexure size is
now structure shearing size is constant, is still
From analyzing above, common freely-supported door opening is comparatively with cantilever freely-supported door opening stock utilization low, and span is little.When shearing is allowed, the more common freely-supported door opening of employing band cantilever door opening in theory its span can double.
Summary of the invention
The purpose of this utility model is to propose a kind of Bailey beam door opening with cantilever end, and the door opening for cast-in-place structurals such as case beams is constructed.This band cantilever Bailey beam cast-in-place formwork freely-supported door opening comprises Bailey beam door opening and falsework, and described Bailey beam door opening crosses over the barrier below it, and described falsework is positioned at the top of described Bailey beam.
To achieve these goals, Oil pipeline is extended to two ends certain length γ L (L is door opening span,
thus reach the object of saving material or increasing door opening span.
Band cantilever Bailey beam cast-in-place formwork freely-supported door opening, this door opening comprises door opening buttress concrete foundation 1, door opening props up pier foundation built-in fitting 2, on door opening shellfish thunder buttress 3, door opening buttress back timber 4, I-steel 5, Bailey beam across a part 6, Bailey beam bracketed part 7, bowl button support 8, square steel 9, bowl button support collet 10.
Door opening props up pier foundation built-in fitting 2 and is fixed in door opening buttress concrete foundation 1, and door opening shellfish thunder buttress 3 is fixed on door opening and props up on pier foundation built-in fitting 2; On door opening buttress, back timber 4 is fixed on door opening shellfish thunder buttress 3, and three I-steel 5 are welded into entirety side by side and are fixed on door opening buttress on back timber 4; Bailey beam is placed on I-steel 5, and Bailey beam comprises Bailey beam across a part 6, Bailey beam bracketed part 7; Square steel 9 is laterally laid on Bailey beam top boom place, and described square steel 9 adopts the colligation one by one of 8# galvanized wire with Bailey beam top boom intersection; Square steel 9 installs bowl button support collet 10 after laying, and bowl button support collet 10 is U-shaped, tips upside down on square steel 9.The length of described Bailey beam bracketed part 7 is the integral multiple of 0.75m, and is less than or equal to 0.35 times of Bailey beam across a part 6 net span.
Compared with prior art, the present invention has following beneficial effect.
Bailey beam freely-supported door opening stretches out certain length and forms cantilever design to both sides, by the length of adjustment Bailey beam freely-supported door opening cantilever design, thus increase effective span, improve the utilization ratio of Bailey beam structural bearing capacity.
Accompanying drawing explanation
Fig. 1 is freely-supported door opening shearing, bending moment diagram
Fig. 2 is structure shearing, bending moment diagram after extending to bilateral symmetry
Fig. 3 is the door opening buttress schematic diagram of an embodiment.
Fig. 4 is the band cantilever freely-supported door opening schematic diagram of an embodiment.
Fig. 5 is that support overall schematic buckled by the band cantilever freely-supported door opening of an embodiment and top bowl thereof.
Fig. 6 is top bowl button support and the Bailey beam crossed node schematic diagram of an embodiment.
In figure: 1, door opening buttress concrete foundation, 2, door opening props up pier foundation built-in fitting, 3, door opening shellfish thunder buttress, 4, back timber on door opening buttress, 5, I-steel, 6, Bailey beam across a part, 7, Bailey beam bracketed part, 8, bowl button support, 9, square steel, 10, bowl button support collet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As seen in figures 3-6, band cantilever Bailey beam cast-in-place formwork freely-supported door opening, this door opening comprises door opening buttress concrete foundation 1, door opening props up pier foundation built-in fitting 2, on door opening shellfish thunder buttress 3, door opening buttress back timber 4, I-steel 5, Bailey beam across a part 6, Bailey beam bracketed part 7, bowl button support 8, square steel 9, bowl button support collet 10.
Door opening props up pier foundation built-in fitting 2 and is fixed in door opening buttress concrete foundation 1, and door opening shellfish thunder buttress 3 is fixed on door opening and props up on pier foundation built-in fitting 2; On door opening buttress, back timber 4 is fixed on door opening shellfish thunder buttress 3, and three I-steel 5 are welded into entirety side by side and are fixed on door opening buttress on back timber 4; Bailey beam is placed on I-steel 5, and Bailey beam comprises Bailey beam across a part 6, Bailey beam bracketed part 7; Square steel 9 is laterally laid on Bailey beam top boom place, and described square steel 9 adopts the colligation one by one of 8# galvanized wire with Bailey beam top boom intersection; Square steel 9 installs bowl button support collet 10 after laying, and bowl button support collet 10 is U-shaped, tips upside down on square steel 9.The length of described Bailey beam bracketed part 7 is the integral multiple of 0.75m, and is less than or equal to 0.35 times of Bailey beam across a part 6 net span.
Described three I-beams 5 are welded into entirety and side by side as the bearing of Bailey beam.
Described each square steel spacing is determined by bowl button support 8 spacing.
Special Bailey beam bracing frame is adopted to connect to increase its lateral rigidity according to spacing between described Bailey beam.
Described bowl button support collet 10 adopts jacking to replace, and is buckled on the square steel above Bailey beam.
U-bolt or bifilar 8# galvanized wire is adopted to fix between described square steel and Bailey beam.
The size of described door opening buttress concrete foundation 1, door opening shellfish thunder buttress 3 can be determined by vertical load, can suitably strengthen.
As shown in Fig. 3 ~ Fig. 6, a kind of construction method setting up band cantilever freely-supported door opening with Bailey truss, set up for cast-in-place box beam bracket door opening, it is characterized in that comprising the following steps according to the order of sequence:
A. door opening Bailey truss buttress is set up.As shown in Figure 1, by design size pouring reinforcement concrete basis 1, basic pre-buried Bailey truss buttress connector 2.After being assembled by Bailey truss buttress 3, lifting is connected with basic built-in fitting 2, then installs back timber 4.After the whole Bailey truss buttress in door opening side installs, three I-beams 5 are welded into side by side supreme back timber 4 top of overall rear lifting, as the bearing of Bailey beam 6.
B. Bailey beam is set up and is lifted.As shown in Figure 2, determine that single Pin Bailey beam sets up form and jib-length according to calculating.Because monolithic Bailey beam length only has 1.5m and 3.0m two kinds, therefore the length of Bailey beam bracketed part 7 is the integral multiple of 0.75m, and is less than or equal to 0.35 times of Bailey beam 6 net span.Single Pin Bailey beam adopt 3 rows or 5 rows assembled, assembled complete after employing crane lifting in place, then adopt bracing frame to be linked to be entirety.
C. top bowl button support is set up.As shown in figs. 34, after band cantilever Bailey beam door opening is set up, laterally lay 10 × 10 square steel 9, square steel spacing is determined according to bowl button support 8 spacing, and square steel 9 and Bailey beam top boom intersection adopt the colligation one by one of 8# galvanized wire.Square steel installs bowl button support collet 10 after laying, and bowl button support collet 10 is U-shaped, tips upside down on square steel 9.Top bowl button support 8 and upper mould thereof etc. are progressively set up after bowl button support collet 10 installs.
Claims (7)
1. be with cantilever Bailey beam cast-in-place formwork freely-supported door opening, it is characterized in that: this door opening comprises door opening buttress concrete foundation (1), door opening props up pier foundation built-in fitting (2), on door opening shellfish thunder buttress (3), door opening buttress back timber (4), I-steel (5), Bailey beam across a part (6), Bailey beam bracketed part (7), bowl button support (8), square steel (9), bowl button support collet (10);
Door opening props up pier foundation built-in fitting (2) and is fixed in door opening buttress concrete foundation (1), and door opening shellfish thunder buttress (3) is fixed on door opening and props up on pier foundation built-in fitting (2); On door opening buttress, back timber (4) is fixed on door opening shellfish thunder buttress (3), and three I-steel (5) are welded into entirety side by side and are fixed on door opening buttress on back timber (4); Bailey beam is placed on I-steel (5), and Bailey beam comprises Bailey beam across a part (6), Bailey beam bracketed part (7); Square steel (9) is laterally laid on Bailey beam top boom place, and described square steel (9) and Bailey beam top boom intersection adopt the colligation one by one of 8# galvanized wire; Square steel (9) installs bowl button support collet (10) after laying, and bowl button support collet (10), for U-shaped, tips upside down on square steel (9); The length of described Bailey beam bracketed part (7) is the integral multiple of 0.75m, and is less than or equal to 0.35 times of Bailey beam across a part (6) net span.
2. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: described three I-beams (5) are welded into entirety and side by side as the bearing of Bailey beam.
3. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: described each square steel spacing is detained support (8) spacing by bowl and determined.
4. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: adopt special Bailey beam bracing frame to connect according to spacing between described Bailey beam.
5. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: described bowl button support collet (10) adopts jacking to replace, and is buckled on the square steel above Bailey beam.
6. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: adopt U-bolt or bifilar 8# galvanized wire to fix between described square steel and Bailey beam.
7. band cantilever Bailey beam cast-in-place formwork freely-supported door opening according to claim 1, is characterized in that: the size of described door opening buttress concrete foundation (1), door opening shellfish thunder buttress (3) can be determined by vertical load.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420588132.6U CN204298739U (en) | 2014-10-11 | 2014-10-11 | Band cantilever Bailey beam cast-in-place formwork freely-supported door opening |
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| CN201420588132.6U CN204298739U (en) | 2014-10-11 | 2014-10-11 | Band cantilever Bailey beam cast-in-place formwork freely-supported door opening |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250748A (en) * | 2021-12-28 | 2022-03-29 | 中交二航局第一工程有限公司 | Construction method of orifice type check brake simply supported beam combined support |
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2014
- 2014-10-11 CN CN201420588132.6U patent/CN204298739U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250748A (en) * | 2021-12-28 | 2022-03-29 | 中交二航局第一工程有限公司 | Construction method of orifice type check brake simply supported beam combined support |
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