CN217869915U - Cast-in-place girder construction of cable-stay bridge side span - Google Patents
Cast-in-place girder construction of cable-stay bridge side span Download PDFInfo
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- CN217869915U CN217869915U CN202221849675.XU CN202221849675U CN217869915U CN 217869915 U CN217869915 U CN 217869915U CN 202221849675 U CN202221849675 U CN 202221849675U CN 217869915 U CN217869915 U CN 217869915U
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Abstract
The application discloses cast-in-place beam structure of cable-stay bridge side span, it includes concrete box roof beam, and concrete beam's cavity internal fixation has a plurality of interior moulding boxes, is provided with a plurality of stiffening pipes in the interior moulding box, and stiffening pipe and interior moulding box's inner wall fixed mounting, the stiffening pipe sets up along the circumference of interior moulding box, and a plurality of stiffening pipes are arranged along the depth direction of interior moulding box. This application has the structural strength who strengthens interior moulding box surface, makes the concrete box roof beam accomplish pours the fashioned in-process of waiting for, and the interior moulding box is difficult for warping because of receiving concrete pressure, thereby makes the interior moulding box effect of the stability that improves the concrete box roof beam more firm.
Description
Technical Field
The application relates to the field of bridge construction engineering, in particular to a side span cast-in-place beam structure of a cable-stayed bridge.
Background
At present, in the bridge construction process, due to the fact that the bridge is difficult to be lifted by using a bridge lifting mode under the condition of special terrain or overlarge bridge, a formwork needs to be built on a bent frame on site to carry out cast-in-place of a concrete box girder so as to form a continuous cast-in-place girder, and the concrete box girder and a pier are fixed through stay cables, so that the cast-in-place girder is more stable.
An inner mold box and an outer mold need to be erected before the existing concrete box girder is poured, a mold cavity is formed between the inner mold box and the outer mold, the mold cavity is used for pouring concrete to form the concrete box girder, and the inner mold is a hollow wooden box and is used for forming a cavity of the concrete box girder; in the process of waiting for forming after the concrete box girder is poured, the concrete generates pressure on the inner mould box and the outer mould due to the pressure influence of the concrete, the inner mould box is a hollow wooden box, the strength is low, the inner mould box is easy to deform under continuous strong pressure, and the deformation of the concrete box girder is caused, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
In order to improve the intensity and the stability of interior moulding box, this application provides a cast-in-place beam structure of cable-stay bridge side span.
The application provides a cast-in-place roof beam structure of cable-stay bridge side span adopts following technical scheme:
the utility model provides a cast-in-place beam structure of cable-stay bridge side span, includes the concrete box roof beam, the cavity internal fixation of concrete box roof beam has a plurality of interior moulding boxes, be provided with a plurality of stiffening pipes in the interior moulding box, the inner wall fixed mounting of stiffening pipe and interior moulding box, the stiffening pipe sets up along the circumference of interior moulding box, and is a plurality of the stiffening pipe is arranged along the depth direction of interior moulding box.
Through adopting above-mentioned technical scheme, a plurality of stiffening pipes are arranged along the depth direction of interior moulding box and are set up, just stiffening pipes are followed the circumference setting of interior moulding box and with interior moulding box inner wall fixed mounting strengthens the structural strength on interior moulding box surface makes the concrete box roof beam accomplish to pour the in-process of waiting for the shaping, and the interior moulding box is difficult for warping because of receiving concrete pressure, makes thereby the stability of concrete box roof beam is improved to the centre form case is firm more.
Preferably, a plurality of vertical supporting tubes and a plurality of horizontal supporting tubes are fixed in the inner mould box, two ends of each vertical supporting tube respectively abut against the top and the bottom of the inner mould box, two ends of each horizontal supporting tube respectively abut against the side wall of the inner mould box, and a connecting system is fixedly connected between each horizontal supporting tube and each vertical supporting tube.
By adopting the technical scheme, the vertical supporting tube and the transverse supporting tube are arranged in the inner mould box and are abutted against the inner mould box, the inner mould box transmits the pressure of concrete to the vertical supporting tube and the transverse supporting tube, the vertical supporting tube provides vertical supporting force for the inner mould box, the transverse supporting tube provides transverse supporting force for the inner mould box, so that the compression limit of the inner mould box is improved, the vertical supporting tube and the transverse supporting tube are uniformly stressed by connecting the connection system, the stability of the vertical supporting tube and the transverse supporting tube is improved, and the inner mould box is more stable.
Preferably, telescopic assemblies are arranged at two ends of the vertical supporting tube, one end of each telescopic assembly is abutted against the vertical supporting tube, and one end, far away from the vertical supporting tube, of each telescopic assembly is fixedly installed with the inner mold box.
By adopting the technical scheme, the telescopic assembly is fixedly connected between the inner wall of the inner mould box and the vertical supporting tubes, the telescopic assembly is used as the extension of the vertical supporting tubes so as to keep the vertical supporting tubes and the inner mould box in a tightly abutted state, and the inner mould box is enabled to uniformly transmit the concrete pressure applied to the inner mould box downwards to the vertical supporting tubes through the abutting of the vertical supporting tubes, so that the top end and the bottom end of the inner mould box are not easy to deform.
Preferably, the telescopic assembly comprises a chassis, a screw rod and an adjusting nut, one end of the chassis is abutted to the inner mold box, one end of the chassis, far away from the inner mold box, is fixedly connected with the screw rod, one end of the screw rod, far away from the chassis, is sleeved with the vertical supporting tube, the adjusting nut is in threaded connection with the screw rod, and one end of the vertical supporting tube, close to the chassis, is abutted to the adjusting nut.
By adopting the technical scheme, the lead screw with vertical stay tube cup joints, vertical stay tube one end with adjusting nut butt is through rotatory regulation adjusting nut's high position, the degree of depth that vertical stay tube was cup jointed to the control lead screw to adjust the extension length of vertical stay tube, make and adjust convenient high-efficient more, after pouring the completion, can shorten extension length through adjusting nut, make vertical stay tube easily demolishs, improves work efficiency.
Preferably, a plurality of square timbers are arranged between the inner mould box and the stiffening pipe, the square timbers are fixedly installed on the inner wall of the inner mould box, the square timbers are arranged along the depth direction of the inner mould box, and the square timbers are laid along the circumferential direction of the inner mould box.
Through adopting above-mentioned technical scheme, the square timber setting is in the inner formword with between the stiffening pipe, the square timber with the stiffening pipe is arranged the setting with great ease, works as the stiffening pipe receives make the atress more even during the pressure of inner mould case, and the structure is more firm, has improved the internal mould case overall stability.
Preferably, the concrete box girder further comprises an outer mold, a first transverse anti-pulling part is fixed between the outer mold and the side wall of the inner mold box, one end of the first transverse anti-pulling part is fixedly connected with the outer mold, and one end, far away from the outer mold, of the first transverse anti-pulling part is fixedly connected with the side wall of the inner mold box.
By adopting the technical scheme, the first transverse anti-pulling piece is fixedly connected between the outer die and the side wall of the inner template, and the first transverse anti-pulling piece provides transverse anti-pulling force for the inner template box, so that the position of the inner template box is fixed, and the inner template box is not easy to displace due to concrete pressure in the pouring process.
Preferably, a second transverse anti-pulling part is fixedly connected between two adjacent inner mold boxes, each inner mold box comprises a plurality of inner mold plates, the second transverse anti-pulling part is located between two inner mold boxes, one end of the second transverse anti-pulling part is fixedly connected with the inner mold plate, and the other end of the second transverse anti-pulling part is fixedly connected with the other adjacent inner mold plate.
Through adopting above-mentioned technical scheme, the horizontal resistance to plucking piece of second is fixed adjacent two between the interior moulding box, the horizontal resistance to plucking piece of second makes adjacent two the interior moulding box provides horizontal interact power, first horizontal resistance to plucking piece with the horizontal resistance to plucking piece of second acts on simultaneously interior moulding box, thereby makes interior moulding box atress is more even, is difficult for leading to because of the atress is too concentrated the interior moulding box damages, makes interior moulding box is more firm.
Preferably, the edge of the adjusting nut protrudes to form a limiting ring, and the inner wall of the limiting ring is abutted to the outer wall of the vertical supporting tube.
By adopting the technical scheme, the limiting ring is abutted against the outer wall of the supporting pipe through the edge protrusion, so that the supporting pipe is limited, and the supporting pipe is not easy to horizontally move by the limiting ring, so that the inner mould box is more stable.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the stiffening pipes are circumferentially arranged along the inner wall of the inner template and are distributed along the depth direction of the inner template, so that the structural strength of the inner template is improved, the inner template is not easy to deform due to the concrete pressure, the inner template is more stable, and the stability of the concrete box girder is improved;
2. the transverse supporting tubes and the vertical supporting tubes provide extra transverse and vertical supporting force for the inner mold, so that the strength of the inner mold is enhanced, the stress of the inner mold plate is uniform, and the inner mold plate is not easy to deform;
3. the telescopic assembly enables the vertical supporting tube to be matched with the shape of the inner mould box, so that the vertical supporting tube and the inner mould box are kept in a tight abutting state, the strength of the inner mould box is improved, the vertical supporting tube is convenient to detach after the concrete box girder is formed, and the efficiency is improved;
4. the transverse anti-pulling piece provides transverse anti-pulling force for the inner mould box, so that the inner mould box is not easy to generate displacement due to concrete pressure, and the positioning effect of the inner mould box is achieved, and the structure of the concrete box girder is more stable.
Drawings
Fig. 1 is a schematic overall structure diagram of the application embodiment.
Fig. 2 is a cross-sectional front view of a concrete box girder in the embodiment of the present application.
Fig. 3 is a schematic view of the overall structure of the first telescopic assembly.
Fig. 4 is a schematic view of the overall structure of the second telescopic assembly.
Description of reference numerals:
1. a middle inner mold box; 2. a side inner mold box; 3. a sideform; 31. a vertical section; 32. an inclined section; 4. a bottom template; 5. an inner template; 6. a stiffening tube; 7. a vertical supporting tube; 8. transversely supporting a tube; 9. a first transverse anti-pulling element; 10. a second transverse anti-pulling element; 11. square wood; 12. a connecting system; 13. a first telescoping assembly; 131. a screw rod; 132. adjusting the nut; 133. a first chassis; 134. a limiting ring; 14. a second telescoping assembly; 141. a second chassis; 15. concrete box girder.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses cast-in-place beam structure of cable-stayed bridge side span. Referring to fig. 1, the side span cast-in-place beam structure of the cable-stayed bridge comprises a concrete box beam 15; the concrete box girder 15 includes an outer mold surrounding both sides and the bottom of the concrete box girder 15 and a plurality of inner mold boxes forming a cavity of the concrete box girder 15 inside the concrete box girder 15, a cavity being formed between the outer mold and the inner mold boxes, the concrete box girder 15 being formed of a concrete casting cavity, the cavity formed by the inner mold boxes reducing a concrete casting amount of the concrete box girder 15, and the inner mold boxes reducing an overall weight of the concrete box girder 15.
Referring to fig. 2, the concrete box girder 15 includes an external mold, the external mold includes two side mold plates 3 and a bottom mold plate 4, the side mold plates 3 are composed of a vertical section 31 and an inclined section 32, two ends of the bottom mold plate 4 are respectively fixedly connected with one ends of the two inclined sections 32, and one end of the inclined section 32 far away from the bottom mold plate 4 is fixedly connected with the vertical section 31.
Referring to fig. 2, the concrete box girder 15 includes three inner formwork boxes, the inner formwork boxes include a plurality of inner formwork panels 5 and are formed by surrounding the inner formwork panels 5, the three inner formwork boxes include a middle inner formwork box 1 and two side inner formwork boxes 2, the middle inner formwork box 1 is located in the middle of the concrete box girder 15, the side inner formwork box 2 is located between the middle inner formwork box 1 and the side formwork 3, the two side inner formwork boxes 2 are symmetrical along the middle inner formwork box 1, and a mold cavity is formed between the side inner formwork box 2 and the middle inner formwork box 1.
Referring to fig. 2, a plurality of first transverse anti-pulling pieces 9 are fixedly connected between the vertical section 31 and the side inner mold box 2, one end of each first transverse anti-pulling piece 9 is fixedly connected with the vertical section 31, one end of each first transverse anti-pulling piece 9, which is far away from the vertical section 31, is fixedly connected with the side inner mold box 2, the first transverse anti-pulling pieces 9 provide anti-pulling force for the side inner mold box 2, and the first transverse anti-pulling pieces 9 fix the position of the side inner mold box 2.
Referring to fig. 2, a plurality of second transverse anti-pulling pieces 10 are fixedly connected between the side inner mold box 2 and the middle inner mold box 1, one end of each second transverse anti-pulling piece 10 is fixedly connected with one side, far away from the outer mold, of the side inner mold box 2, one end, far away from the side inner mold box 2, of each second transverse anti-pulling piece 10 is fixedly connected with the middle inner mold box 1, the plurality of second transverse anti-pulling pieces 10 provide anti-pulling force for the middle inner mold box 1, and the plurality of second transverse anti-pulling pieces 10 enable the middle inner mold box 1 to be fixed in position.
Referring to fig. 1 and 2, a plurality of square timbers 11 are arranged in the side inner mold box 2 and the middle inner mold box 1, the square timbers 11 extend along the depth direction of the inner mold box, the square timbers 11 are uniformly laid along the circumferential direction of the inner mold box, and one side of each square timbers 11 is fixedly connected with the inner mold plate 5; one side fixedly connected with that interior template 5 was kept away from to square timber 11 is a plurality of stiffening pipes 6, and stiffening pipe 6 sets up along the circumference of interior moulding box, and a plurality of stiffening pipes 6 are arranged along interior moulding box depth direction, and stiffening pipe 6 is arranged with square timber 11 vertically and horizontally, and 6 end-to-end connections of stiffening pipe in the avris interior moulding box 2, and stiffening pipe 6 and square timber 11 make interior moulding box circumference structural strength strengthen increasing, and interior moulding box is difficult for warping because of receiving concrete pressure, improves 15 stability of concrete box roof beam.
Referring to fig. 1 and 2, a plurality of vertical supporting tubes 7 and horizontal supporting tubes 8 are arranged in the middle inner mold box 1 and the two side inner mold boxes 2, the vertical supporting tubes 7 and the horizontal supporting tubes 8 are alternately arranged along the depth direction of the inner mold box, the horizontal supporting tubes 8 are horizontally arranged, two ends of each horizontal supporting tube 8 are fixedly connected with a stiffening tube 6, the vertical supporting tubes 7 are vertically placed, telescopic assemblies are fixedly connected between the vertical supporting tubes 7 and the inner mold boxes and comprise first telescopic assemblies 13 and second telescopic assemblies 14.
Referring to fig. 1 and 2, vertical supporting tube 7 both ends in 2 mould boxes in two avris, the equal fixed mounting in one end of mould bottom portion has first telescopic subassembly 13 in keeping away from of vertical supporting tube 7 in 1 mould box in the middle part, the one end and the vertical supporting tube 7 of first telescopic subassembly 13 cup joint, the one end and the stiffening pipe 6 fixed connection of vertical supporting tube 7 are kept away from to first telescopic subassembly 13, the one end fixed mounting that vertical supporting tube 7 in 1 mould box is close to 1 mould box bottom in the middle part has second telescopic subassembly 14, 14 one end of second telescopic subassembly cup joints with vertical supporting tube 7, the one end fixed connection that vertical supporting tube 7 was kept away from to second telescopic subassembly 14 is in the bottom of mould box 1 in the middle part. Vertical stay tube 7 and horizontal stay tube 8 provide extra holding power for the centre form case, make the centre form case be difficult for producing deformation because of receiving concrete pressure, have improved 15 stability of concrete box girder. A connecting system 12 is arranged between the vertical supporting tube 7 and the horizontal supporting tube 8 in each inner mould box; the connection system 12 comprises a plurality of supporting rods, one end of each supporting rod is fixedly connected with the vertical supporting tube 7, one end, far away from the vertical supporting tube 7, of each supporting rod is fixedly connected with the transverse supporting tube 8, the connection system 12 enables the vertical supporting tube 7 and the transverse supporting tube 8 to be stressed evenly, and the stability of the vertical supporting tube 7 and the transverse supporting tube 8 is improved, so that the internal mold box is more stable.
Referring to fig. 3 and 4, the telescopic assembly includes a screw 131, an adjusting nut 132 and a chassis including a first chassis 133 and a second chassis 141, the first telescopic assembly 13 includes the screw 131, the adjusting nut 132 and the first chassis 133, and the second telescopic assembly includes the screw 131, the adjusting nut 132 and the second chassis 141; the adjusting nut 132 is in threaded connection with the screw rod 131, one end of the screw rod 131 is sleeved with the vertical supporting tube 7, one end of the vertical supporting tube 7 is abutted to the adjusting nut 132, the edge of the adjusting nut 132 protrudes to form a limiting ring 134, and the inner wall of the limiting ring 134 is abutted to the outer wall of the vertical supporting tube 7. In the first telescopic assembly 13, one end of the screw rod 131 far away from the vertical supporting tube 7 is integrally formed with a first chassis 133, and one end of the first chassis 133 far away from the screw rod 131 is provided with a clamping groove and is fixedly connected with the stiffening tube 6; in the second telescopic assembly 14, one end of the screw rod 131 far away from the vertical support pipe 7 is integrally formed with the second chassis 141, and one end of the second chassis 141 far away from the screw rod 131 is a flat plate and is abutted against the bottom of the middle inner mold box 1.
Referring to fig. 3, the telescopic assembly changes the overall length of the vertical support tube 7 and the telescopic assembly by changing the position of the adjusting nut 132 on the screw rod 131, so that the vertical support tube 7 is tightly abutted against the inner formwork through the telescopic assembly in the concrete forming process, the vertical support tube 7 better provides vertical supporting force for the inner formwork, and the stability of the inner formwork is improved; after the concrete box girder 15 is poured and molded, the whole length of the vertical supporting tube 7 and the telescopic assembly is shortened, so that the vertical supporting tube 7 is not easy to damage in the dismantling process, the repeated utilization rate is improved, the inner wall of the limiting ring 134 and the outer wall of the vertical supporting tube 7 are abutted to enable the vertical supporting tube 7 to be not easy to generate displacement, and the internal mold box is more stable.
The implementation principle of the cast-in-place roof beam structure of cable-stay bridge sidespan of this application embodiment does: stiffening pipe 6 and square timber 11 have strengthened the circumference structural strength of centre form case, improve the resistance to deformation ability of centre form incasement wall, vertical stay tube 7 and horizontal stay tube 8 provide extra holding power for the centre form case jointly, make the concrete transmit vertical stay tube 7 and horizontal stay tube 8 to the pressure of centre form case through the centre form incasement wall, transmit power to centre form bottom of the case end through vertical stay tube 7 and horizontal stay tube 8, the centre form bottom of the case will receive pressure transmission to with the concrete of centre form bottom, thereby reduce the atress of centre form incasement wall, reduce centre form deformation degree, thereby make the centre form case more stable, improve the stability of concrete box roof beam 15.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a cast-in-place girder construction of cable-stay bridge side span, includes concrete box girder (15), its characterized in that: the concrete box girder comprises a concrete box girder (15), and is characterized in that a plurality of inner mould boxes are fixed in a cavity of the concrete box girder, a plurality of stiffening pipes (6) are arranged in the inner mould boxes, the stiffening pipes (6) are fixedly installed on the inner walls of the inner mould boxes, the stiffening pipes (6) are arranged along the circumferential direction of the inner mould boxes, and the stiffening pipes (6) are arranged along the depth direction of the inner mould boxes.
2. A cable-stayed bridge side span cast-in-place beam structure according to claim 1, characterized in that: a plurality of vertical supporting tubes (7) and a plurality of transverse supporting tubes (8) are fixed in the inner mould box, two ends of each vertical supporting tube (7) respectively abut against the top and the bottom of the inner mould box, two ends of each transverse supporting tube (8) respectively abut against the side wall of the inner mould box, and a connecting system (12) is fixedly connected between each transverse supporting tube (8) and each vertical supporting tube (7).
3. A cable-stayed bridge side span cast-in-place beam structure according to claim 2, characterized in that: and telescopic assemblies are arranged at two ends of the vertical supporting pipe (7), one end of each telescopic assembly is tightly abutted to the vertical supporting pipe (7), and one end, far away from the vertical supporting pipe (7), of each telescopic assembly is fixedly installed with the inner mold box.
4. A cable-stayed bridge side span cast-in-place beam structure according to claim 3, characterized in that: the telescopic assembly comprises a chassis, a screw rod (131) and an adjusting nut (132), one end of the chassis is abutted to the inner mold box, one end of the inner mold box is far away from the chassis and is fixedly connected with the screw rod (131), one end of the chassis is far away from the screw rod (131) and is sleeved with the vertical supporting tube (7), the adjusting nut (132) is in threaded connection with the screw rod (131), and the vertical supporting tube (7) is close to one end of the chassis and is abutted to the adjusting nut (132).
5. A cable-stayed bridge side span cast-in-place beam structure according to claim 1, characterized in that: interior mould case with be provided with a plurality of square timber (11) between stiffening tube (6), square timber (11) fixed mounting be in the inner wall of interior mould case, square timber (11) are followed interior mould case degree of depth direction sets up, and is a plurality of square timber (11) are followed interior mould case circumference is laid.
6. A cable-stayed bridge side span cast-in-place beam structure according to claim 1, characterized in that: the concrete box girder (15) further comprises an outer mold, a first transverse anti-pulling part (9) is fixed between the outer mold and the side wall of the inner mold box, one end of the first transverse anti-pulling part (9) is fixedly connected with the outer mold, and one end, far away from the outer mold, of the first transverse anti-pulling part (9) is fixedly connected with the side wall of the inner mold box.
7. A cable-stayed bridge side span cast-in-place beam structure according to claim 1, characterized in that: adjacent two be fixed with horizontal resistance to plucking piece of second (10) between the interior moulding box, interior moulding box includes a plurality of inner formworks (5), horizontal resistance to plucking piece of second (10) are located two between the interior moulding box, the one end of the horizontal resistance to plucking piece of second (10) with inner formwork (5) fixed connection, the other end and another adjacent piece of the horizontal resistance to plucking piece of second (10) inner formwork (5) fixed connection.
8. A cable-stayed bridge side span cast-in-place beam structure according to claim 4, characterized in that: the edge of the adjusting nut (132) protrudes with a limiting ring (134), and the inner wall of the limiting ring (134) is abutted to the outer wall of the vertical supporting pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849675.XU CN217869915U (en) | 2022-07-18 | 2022-07-18 | Cast-in-place girder construction of cable-stay bridge side span |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849675.XU CN217869915U (en) | 2022-07-18 | 2022-07-18 | Cast-in-place girder construction of cable-stay bridge side span |
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| Publication Number | Publication Date |
|---|---|
| CN217869915U true CN217869915U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221849675.XU Active CN217869915U (en) | 2022-07-18 | 2022-07-18 | Cast-in-place girder construction of cable-stay bridge side span |
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| Country | Link |
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| CN (1) | CN217869915U (en) |
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2022
- 2022-07-18 CN CN202221849675.XU patent/CN217869915U/en active Active
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