CN210458950U - Formwork support for inclined vertical column construction - Google Patents
Formwork support for inclined vertical column construction Download PDFInfo
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- CN210458950U CN210458950U CN201920684470.2U CN201920684470U CN210458950U CN 210458950 U CN210458950 U CN 210458950U CN 201920684470 U CN201920684470 U CN 201920684470U CN 210458950 U CN210458950 U CN 210458950U
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Abstract
The utility model discloses a formwork support for oblique column construction, which relates to the technical field of formwork support, and comprises a bearing support, a bottom mould, an oblique column side mould and an oblique column tripod, wherein the bottom mould is arranged on the oblique column tripod, the oblique column side mould is arranged on the bottom mould, and the central axis of the oblique column side mould is parallel to the inclined plane of the oblique column tripod; the beneficial effects of the utility model reside in that: the inclined vertical column construction is adopted, the occupied area of the bearing support can be reduced, the construction time is short, and the construction efficiency is high.
Description
Technical Field
The utility model relates to a formwork technical field, concretely relates to formwork of oblique stand construction.
Background
With the development of social economy, automobiles gradually enter families, so that the contradiction between the dramatic increase of social vehicle holding capacity and the limited urban space is increasingly prominent, traffic jam becomes a normal state, and the development of urban traffic to high altitude or under the ground is a necessary trend. Under the condition that buildings around roads are dense and streets are difficult to widen, the viaduct can disperse traffic intensity and improve transportation efficiency. At present, the construction of viaducts in large cities in China is already in scale, the ever-increasing traffic pressure is still difficult to relieve, and the viaducts have the trend of developing towards multiple layers.
By adopting the construction form of 'main line elevated frame + ground auxiliary road', the viaduct is constructed by common rails, the double-layer bridges are integrally arranged, the upper layer is a road bridge, and the lower layer is a track interval bridge, so that the traffic pressure can be effectively relieved. The lower part of the pier column of the double-layer elevated frame is upright and extends outwards from the upper part of the cross beam to two sides, the structure of the pier column is more complex than that of the common pier column, and the requirement on installation and positioning precision is high. In the construction process of the upright column adopted in the common construction, the bearing support occupies a large area, and is long in construction time consumption and low in efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a formwork support of oblique column construction can reduce bearing support area, reduces to set up consuming time, raises the efficiency.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve: the utility model provides a formwork support of oblique stand construction, includes bearing support, die block and oblique stand side form, its characterized in that: still include oblique stand tripod, the die block setting be in oblique stand tripod on, oblique stand side form set up the die block on, the axis of oblique stand side form with oblique stand tripod inclined plane parallel.
In the above technical scheme, preferably, the oblique stand column side mold adopts a shaping steel template.
In the above technical scheme, preferably, a reinforcement cage is further arranged in the side mold of the oblique column.
In the above technical scheme, preferably, opposite-pulling bases are fixed to two sides of the oblique upright post side die, connecting pieces are arranged in the opposite-pulling bases, and the connecting pieces fix the oblique upright post in an opposite-pulling manner.
In the above technical scheme, preferably, the connecting member is phi 25 finish-rolled deformed steel bar.
In the technical scheme, preferably, the bearing support comprises a steel pipe frame, a second main beam, a second auxiliary beam and a frame falling device, the second main beam is arranged on two sides of the oblique vertical column above the steel pipe frame, the second auxiliary beam is arranged above the second main beam at equal intervals and corresponds to the position of the oblique vertical column, the frame falling device is symmetrically arranged above the second auxiliary beam, a cushion frame is arranged on the frame falling device, and the oblique vertical column tripod is arranged on the cushion frame.
Among the above-mentioned technical scheme, preferred, the second girder be double-spliced 32# I-steel, the second auxiliary beam be double-spliced 32# I-steel, the interval between the second auxiliary beam be 600 mm.
In the above technical solution, preferably, the frame falling device is a sandbox.
Compared with the prior art, the utility model has the advantages of: the inclined vertical column construction is adopted, the occupied area of the bearing support can be reduced, the construction time is short, and the construction efficiency is high.
Drawings
Fig. 1 is an overall front view of the present invention;
fig. 2 is an overall side view of the present invention;
fig. 3 is an overall plan view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description.
As shown in fig. 1 to 3, the utility model discloses a formwork support of oblique stand construction, including bearing support 1, die block and oblique stand side form 2, its characterized in that: still include oblique stand tripod 3, the die block setting be in oblique stand tripod 3 on, oblique stand side form 2 set up the die block on, oblique stand side form 2 the axis with 3 inclined planes of oblique stand tripod parallel. The oblique stand column side mold 2 adopts a shaping steel template, and a reinforcement cage is further arranged in the oblique stand column side mold 2. Oblique stand side form 2 both sides be fixed with and to drawing base 4, to drawing the base in be provided with connecting piece 5, connecting piece 5 will oblique stand to drawing fixed, connecting piece 5 be phi 25 finish rolling screw-thread steel, bearing support 1 include steel-pipe frame 6, second girder 7, second auxiliary beam 8, the device 9 that falls, second girder 7 set up in oblique stand both sides steel-pipe frame 6 top, second auxiliary beam 8 equidistant setting be in second girder 7 top correspond oblique stand position department, the device 9 symmetrical placement that falls be in the vice roof beam 8 top of second, the device 9 that falls on be provided with cushion frame 10, oblique stand tripod 3 set up cushion frame 10 on. The second girder 7 be double-spliced 32# I-steel, the second auxiliary girder 8 be double-spliced 32# I-steel, the interval between the second auxiliary girder 8 be 600 mm. The frame falling device 9 is a sandbox.
After the beam is poured, the template and the bearing support of the beam are removed, the steel pipe frame is reserved, the steel pipe frames 6 are continuously overlapped and erected to a certain height, four second main beams 7 are respectively arranged above the steel pipe frames 6 at two sides of each inclined upright post, four second auxiliary beams 8 vertical to the second main beams 7 are arranged at equal intervals above the second main beams 7 corresponding to the positions of the inclined upright posts, two shelf-falling devices 9 are symmetrically placed above each second secondary beam 8, then a cushion frame 10 is placed above the shelf-falling devices 9, an inclined upright post tripod 3 is arranged above the gasket frame 10, a bottom die of an inclined upright post is arranged on the inclined upright post tripod 3, then the inclined upright post reinforcement cage is hoisted, then an oblique upright post side die 2 is installed, opposite-pulling bases 4 are fixed on two sides of the oblique upright post side die 2, two oblique upright posts are oppositely pulled and fixed through pull ropes 5 connected to the opposite-pulling bases, and finally the oblique upright posts are symmetrically and uniformly poured when being poured. The frame falling device 9 is a sandbox, when demoulding, sand in the sandbox is discharged to enable the height of the sandbox to be reduced, and the inclined upright column template moves downwards along with the height of the sandbox to finish demoulding.
After the inclined upright columns are poured and demoulded, horizontal component force exists in the inclined upright columns, and in order to ensure that cracks are not generated at the junction of the inclined upright columns and the cross beam before the bent cap construction, the two inclined upright columns need to be oppositely pulled and fixed. The technical measures are as follows: two symmetrical 50cm multiplied by 1cm pre-embedded iron plates are pre-embedded on a reinforcement cage of the oblique upright post by welding, after the concrete pouring of the upright post is completed, the pre-embedded iron plates are chiseled out and then the double-spliced 16# channel steel and the stiffening rib plate are welded to be used as a base, and then the two oblique upright posts are oppositely pulled and fixed by phi 25 finish-rolled deformed steel bars. The tension is controlled to be 128.4kN, the pressure is 261.55MPa, and the elongation is 1.85cm by calculation.
The attention points when the formwork support frame on the steel pipe frame is dismantled are as follows: the non-prestressed common cast-in-place pier stud can be disassembled after the strength of concrete reaches 100 percent; the side mold is dismantled before prestress tensioning; the bottom die and the formwork support can be disassembled after the pore cement slurry is cured for more than or equal to 7 days after tensioning and grouting are finished; the support die frame is disassembled according to the principle that the support die frame is firstly assembled and then disassembled from top to bottom; and (4) dismantling the I-steel by using a crane, and cutting off all welding spots before hoisting.
When each layer of pier stud is poured, after a bottom die is laid, the sand bag is used for pre-pressing the formwork support, and pre-pressing load is considered according to the most unfavorable working condition. The waterproof cloth is covered for rainproof measures, so that the sand bag is prevented from being soaked by water and the load is prevented from rising. When the prepressing load of the formwork support is calculated, the load on the prepressing formwork support is divided into a plurality of units, and the unit division is determined according to the load distribution form of the upper structure. The pre-pressing load of the formwork support in each unit is 1.1 times of the sum of the self weight of the upper structure in the unit and the weight of the template which is not laid, and the pre-pressing load in each unit is preferably uniformly distributed. The prepressing and loading process of the formwork support frame is preferably divided into three stages, and the loads applied in sequence are 60%, 80% and 100% of the prepressing load value in the unit. During loading, symmetrical load distribution is carried out from the center line of the structure to two sides, and after each stage of loading is finished, the settlement amount of the formwork support is monitored at intervals of 12 hours; when the average value of the settlement difference of the two continuous measuring points of the formwork support is less than 2mm, the continuous loading can be carried out. The unloading can be carried out at one time, and the two sides of the die support frame are symmetrically, evenly and synchronously unloaded.
The method is characterized in that the worst working condition is taken for checking the load of the pier column formwork, the height of a main upright column is 5.5m, the size of a cross beam is 7.76m multiplied by 2.5m, the size of an inclined upright column is 8.6m multiplied by 1.3m multiplied by 2.5m, and the size of a bent cap is 50.72m multiplied by 3.25m multiplied by 2.2 m.
Checking and calculating an inclined upright column formwork: g concrete ═ m (1.3 × 2.5 × 8.6)3×26kN/m3X 3.16/3 ═ 766.4 kN; the Q concrete is 766.4kN/(4 multiplied by 2) 95.8 kN. Looking up a relevant standard and a calculation manual to obtain the following load values: taking the scaffold board by weight: 0.35kN/m2(ii) a Taking the operation layer handrail and the foot baffle plate by weight: 0.14kN/m2(ii) a And (3) self-weight taking of the secure dense mesh network: 0.01kN/m2(ii) a Taking the self weight of the bamboo plywood: 0.3kN/m2(ii) a Taking the self weight of the shaping steel die: 3kN/m2(ii) a Taking personnel and equipment according to uniform live load: 1.0kN/m2(ii) a Taking the load generated when the concrete is vibrated: 2.0kN/m2. Therefore, the method can obtain: construction measure static load Q1 ═ 0.35+0.14+0.01+0.3+3) kN/m2X 1.8 ═ 6.84 kN/m; construction dynamic load Q2 ═ 1+2 kN/m2×0.75m＝2.25kN/m。
And (3) establishing a formwork support calculation model of the inclined upright column by adopting Midas Civil software, loading corresponding static load Q concrete, Q1 and live load Q2, and respectively carrying out structural stress analysis on the second main beam, the second auxiliary beam and the steel pipe frame. The results were: the maximum bending stress of the second auxiliary beam is 142.9MPa, and the maximum shearing stress of the second auxiliary beam is 20.4 MPa; the maximum bending stress of the second main beam is 142.6MPa, and the maximum shearing stress of the second main beam is 72.4 MPa; the maximum bending stress of the steel pipe frame is 115.9MPa, and the maximum shearing stress is 8 MPa; the vertical displacement value of the formwork support of the inclined upright post is 13.8 mm. The first-order buckling characteristic value of the formwork support of the inclined upright post is 73.3 during construction, the first-order buckling characteristic value is greater than 4 of the standard requirement, and the stability meets the requirement.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a formwork support of oblique stand construction, includes bearing support, die block and oblique stand side form, its characterized in that: still include oblique stand tripod, the die block setting be in oblique stand tripod on, oblique stand side form set up the die block on, the axis of oblique stand side form with oblique stand tripod inclined plane parallel.
2. The formwork support for oblique column construction according to claim 1, wherein: the oblique upright post side mold adopts a shaping steel template.
3. The formwork support for oblique column construction according to claim 1, wherein: and a steel reinforcement cage is also arranged in the oblique upright column side mould.
4. The formwork support for oblique column construction according to claim 1, wherein: the inclined upright post is characterized in that opposite-pulling bases are fixed on two sides of the inclined upright post side die, connecting pieces are arranged in the opposite-pulling bases, and the inclined upright posts are fixed in an opposite-pulling mode through the connecting pieces.
5. The formwork support for oblique column construction according to claim 4, wherein: the connecting piece is phi 25 finish-rolled deformed steel bar.
6. The formwork support for oblique column construction according to claim 1, wherein: the bearing support comprises a steel pipe frame, a second main beam, a second auxiliary beam and a falling device, wherein the second main beam is arranged on two sides of an oblique vertical column, the steel pipe frame is arranged above the second main beam, the second auxiliary beam is arranged above the second main beam at equal intervals and corresponds to the position of the oblique vertical column, the falling device is symmetrically arranged above the second auxiliary beam, a lining frame is arranged on the falling device, and the oblique vertical column tripod is arranged on the lining frame.
7. The formwork support for oblique column construction according to claim 6, wherein: the second girder be double-spliced 32# I-steel, the vice roof beam of second between the interval be 600 mm.
8. The formwork support for oblique column construction according to claim 6, wherein: the frame falling device is a sandbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920684470.2U CN210458950U (en) | 2019-05-14 | 2019-05-14 | Formwork support for inclined vertical column construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920684470.2U CN210458950U (en) | 2019-05-14 | 2019-05-14 | Formwork support for inclined vertical column construction |
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| Publication Number | Publication Date |
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| CN210458950U true CN210458950U (en) | 2020-05-05 |
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| CN201920684470.2U Active CN210458950U (en) | 2019-05-14 | 2019-05-14 | Formwork support for inclined vertical column construction |
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| CN (1) | CN210458950U (en) |
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- 2019-05-14 CN CN201920684470.2U patent/CN210458950U/en active Active
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