CN110004838B - Egg-shaped lower through road bridge cast-in-situ box girder support template system - Google Patents
Egg-shaped lower through road bridge cast-in-situ box girder support template system Download PDFInfo
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- CN110004838B CN110004838B CN201910408667.8A CN201910408667A CN110004838B CN 110004838 B CN110004838 B CN 110004838B CN 201910408667 A CN201910408667 A CN 201910408667A CN 110004838 B CN110004838 B CN 110004838B
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 137
- 239000010959 steel Substances 0.000 claims abstract description 137
- 238000009432 framing Methods 0.000 claims abstract description 50
- 238000007493 shaping process Methods 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims 4
- 238000009415 formwork Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a cast-in-situ box girder support template system of an egg-shaped lower through passage bridge, wherein a support area of a cast-in-situ box girder is divided into an arc template area, a steel pipe support area and a full framing area, the arc template area and the steel pipe support area are correspondingly provided with box girder end support structures, each box girder end support structure comprises a plurality of steel pipe upright posts and girders erected on the steel pipe upright posts, a plurality of template distribution girders axially arranged along the lower through passage are erected on the girders corresponding to the arc template area, a shaping steel mould is arranged on the template distribution girders, a plurality of support distribution girders axially arranged along the lower through passage are erected on the girders corresponding to the steel pipe support area, and the supports of the steel pipe support area are supported on the support distribution girders. The invention mainly aims at an egg-shaped underpass, meets the stress requirement of an end structure through box girder end supporting structures at two ends of the underpass, and adopts the cooperation of an arc-shaped template area, a steel pipe support area and a full framing area to form an arc-shaped supporting structure of the underpass so as to meet the requirement of a cast-in-situ box girder structure with an arc bottom.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a cast-in-situ box girder support template system of an egg-shaped lower through road bridge.
Background
In the construction of current lower through road bridge, the structural style of egg type lower through passageway is comparatively special, and its lower through road top is the arc structure, and the tip region of arc structure is close to the pier stud, and its superstructure height is higher, and concrete load is great, and the support span is lower simultaneously, if adopt conventional steel pipe bailey support, has the inconvenient problem of installation, and the load atress demand of corresponding position also can't be better satisfied.
Disclosure of Invention
The invention aims at: aiming at the problems, the bracket template system mainly aims at the cast-in-situ box girder of the egg-shaped underpass bridge is provided.
The technical scheme of the invention is realized as follows: the utility model provides a cast-in-place case roof beam support template system of egg type under pass-through road bridge which characterized in that: the support area of cast-in-situ box girder is divided into an arc-shaped template area, a steel pipe support area and a full framing area, the arc-shaped template area and the steel pipe support area are correspondingly provided with box girder end support structures, the box girder end support structures comprise a plurality of steel pipe stand columns and girders erected on the steel pipe stand columns, the steel pipe stand columns are distributed at equal intervals along the axial direction of a lower through channel, each steel pipe stand column is provided with a girder which is horizontally arranged, one end of each girder is erected at the upper end of the steel pipe stand column, the other end of each girder is arranged in a reserved hole of a bridge abutment, the bottom end of each steel pipe stand column is supported on a concrete foundation at the bottom of the lower through channel, a plurality of template distribution girders which are arranged along the axial direction of the lower through channel are erected on the girders corresponding to the arc-shaped template area, the arc-shaped template area adopts a shaping steel mould, the shaping steel mould is arranged on the template distribution girders, a plurality of support distribution girders which are arranged along the axial direction of the lower through channel are erected on the girders corresponding to the steel pipe support areas, the supports of the support areas are supported on the support distribution girders, the steel mould template areas are cast-in situ, the shaping steel mould template area and the bottom of the full framing system of the support system of the arc-shaped template area is formed by the support system of the steel template area.
The steel pipe upright post is arranged at a position corresponding to a web plate of the cast-in-situ box girder, and the main girder is arranged along the length direction of the web plate of the cast-in-situ box girder and is positioned right below the web plate.
The steel pipe upright post is arranged in the steel pipe support area, and the bottom end of the steel pipe upright post is directly supported on a concrete foundation and welded with an embedded steel plate in the concrete foundation.
The invention discloses a cast-in-situ box girder support template system of an egg-shaped lower through passage bridge, which is characterized in that a pre-buried steel plate is arranged in a preformed hole of a bridge abutment, the end part of a girder inserted into the preformed hole is welded with the pre-buried steel plate in the preformed hole, and the other end of the girder is lapped at the top end of a corresponding steel pipe upright post and fixedly connected through a bolt.
The invention discloses a formwork system for an egg-shaped lower through channel bridge cast-in-situ box girder support, wherein a bowl buckle support is adopted in a steel pipe support area and a full framing area, the setting direction of the bowl buckle support in the steel pipe support area is consistent with the arrangement direction of a support distribution girder, namely, the bowl buckle support in the full framing area is set up along the axial direction of the lower through channel, and the bowl buckle support in the full framing area is set up along the web trend parallel to the cast-in-situ box girder.
The space between the bowl buckle brackets in the steel pipe bracket area is smaller than the space between the bowl buckle brackets in the full framing area, and the space between the bowl buckle brackets in the area corresponding to the web of the cast-in-situ box girder in the full framing area is smaller than the space between the bowl buckle brackets in the area corresponding to the cavity of the cast-in-situ box girder in the full framing area.
The invention relates to a formwork system for an egg-shaped lower through road bridge cast-in-situ box girder support, wherein the upper end surface of a shaping steel mould is arc-shaped, the upper ends of supports in a steel pipe support area and a full framing area form an arc-shaped supporting surface, and the arc-shaped surface of the shaping steel mould is matched with a formwork supported on the supporting surface formed by the steel pipe support area and the full framing area to form an arc-shaped bottom mould of the cast-in-situ box girder.
The invention relates to a formwork system for a cast-in-situ box girder support of an egg-shaped lower through road bridge, which is characterized in that a steel pipe longitudinal distribution girder is arranged on a support jacking of a steel pipe support area and a full framing area, the steel pipe longitudinal distribution girder is installed after being bent into a corresponding radian, a square timber transverse distribution girder is arranged on the steel pipe longitudinal distribution girder, and a formwork is supported on the square timber transverse distribution girder.
The invention relates to a cast-in-place box girder support template system of an egg-shaped lower through passage bridge, wherein a lower through passage and an upper bridge form a certain included angle, namely, the axial center line of the lower through passage and the center line of a bridge structure form a certain included angle, supports of a steel pipe support zone are arranged in an oblique way along the axial center line of the lower through passage, supports of a full framing zone are arranged in an orthogonal way along the center line of the bridge structure, and a transition zone between the steel pipe support zone and the full framing zone is encrypted by the supports of the full framing zone.
The invention relates to a formwork system for an egg-shaped lower through-channel bridge cast-in-situ box girder support, wherein a support in a steel pipe support area is connected with a support in a full framing area through a plurality of steel pipe fasteners which are vertically arranged at a certain interval, and the supports in the two areas form an integral common stress system.
The invention mainly aims at the egg-shaped underpass bridge, meets the stress requirement of an end structure through box girder end supporting structures at two ends of the underpass, and adopts the matching of an arc-shaped template area, a steel pipe support area and a full framing area to form an arc-shaped supporting structure at the upper part of the underpass so as to meet the requirement of a cast-in-situ box girder structure with an arc bottom.
Drawings
Fig. 1 is a general floor plan of the present invention.
FIG. 2 is a schematic view of the structure of the setting steel die in the invention.
Fig. 3 is a general plan view of the present invention.
FIG. 4 is a diagram of a transition zone stent layout between a steel tube stent zone and a full stent zone in the present invention.
Fig. 5 is a cross-sectional view A-A of fig. 1.
Fig. 6 is an enlarged view of the section I in fig. 5.
Fig. 7 is a sectional view of B-B in fig. 1.
Fig. 8 is a cross-sectional view of fig. 1C-C.
The marks in the figure: 1 is a cast-in-situ box girder, 2 is an arc-shaped template area, 3 is a steel pipe support area, 4 is a full framing area, 5 is a steel pipe upright, 6 is a main girder, 7 is a reserved hole, 8 is a concrete foundation, 9 is a template distribution girder, 10 is a shaping steel mould, 11 is a support distribution girder, 12 is a web, 13 is a bowl buckle support, 14 is a cavity, 15 is a template, 16 is a steel pipe longitudinal distribution girder, and 17 is a square timber transverse distribution girder.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-8, a cast-in-situ box girder support template system of an egg-shaped lower through road bridge is characterized in that the bottom of a box girder is in an arc gradual change structure, and a support area of the cast-in-situ box girder 1 is divided into an arc template area 2, a steel pipe support area 3 and a full framing area 4. The space between the supports in the steel pipe support area 3 is smaller than the space between the supports in the full framing area 4, and the space between the supports in the corresponding area of the web 12 of the cast-in-situ box girder 1 in the full framing area 4 is smaller than the space between the supports 13 in the corresponding area of the cavity 14 of the cast-in-situ box girder 1 in the full framing area 4.
In this embodiment, the length of the arc-shaped formwork area is 2m, the area is close to the pier stud, the upper structure is higher, the concrete load is larger, in order to ensure the structural safety of the area and ensure the structure to have enough rigidity, the area bracket is constructed by adopting a shaping steel mould 10, the shaping steel mould is designed and processed by a professional manufacturer, and the load of the shaping steel mould meets the stress requirement of the structure; the length of the steel pipe support area is 3.512m, the steel pipe support area 3 adopts a bowl buckle support 13, and the setting direction of the bowl buckle support is set up along the axial direction of the lower through passage. Considering that the upper structure of the area has larger load, the erection space of the bowl buckle bracket in the area is 30cm multiplied by 30cm; the length of the full framing area is 13.2m, the full framing area 4 adopts a floor type bowl buckle bracket 13, the erection direction of the full framing area is along the trend parallel to the web 12 of the cast-in-situ box girder 1, the erection space of the bowl buckle bracket corresponding to the web in the area is 30cm multiplied by 60cm, and the erection space of the bracket 13 corresponding to the cavity area is 60cm multiplied by 60cm.
The steel pipe support system comprises an arc-shaped template area 2 and a steel pipe support area 3, wherein the arc-shaped template area 2 and the steel pipe support area 3 are correspondingly provided with a box girder end supporting structure, the box girder end supporting structure comprises a plurality of steel pipe uprights 5 and girders 6 erected on the steel pipe uprights 5, the steel pipe uprights 5 are distributed at equal intervals along the lower through channel axial direction, each steel pipe upright 5 is provided with a horizontally arranged girder 6, one end of each girder 6 is erected at the upper end of the steel pipe upright 5, the other end of each girder is placed in a reserved hole 7 of a bridge abutment, the bottom end of each steel pipe upright 5 is supported on a concrete foundation 8 at the bottom of the lower through channel, a plurality of template distribution girders 9 which are arranged along the lower through channel axial direction are erected on the girders 6 corresponding to the arc-shaped template area 2, a plurality of support distribution girders 11 which are arranged along the lower through channel axial direction are erected on the girders 6 corresponding to the steel pipe support area 3, supports of the steel pipe support area 3 are supported on the support distribution girders 11, and the cast-in-situ steel mould template area 2 and the common support system of the steel pipe support area 1, namely the bottom of the box girder support system of the steel pipe support area 4. In addition, in order to improve the stable support of the box girder, the steel pipe upright 5 is arranged at a position corresponding to the web 12 of the cast-in-situ box girder 1, and the main girder 6 is arranged along the length direction of the web 12 of the cast-in-situ box girder 1 and is positioned right below the web 12.
The upper end face of the shaping steel die 10 is arc-shaped, the support tops of the steel tube support area 3 and the full framing area 4 are provided with an adjusting mechanism for adjusting the support height of the support, the support is arranged according to a certain height difference according to the arc curve radian of the top of the egg-shaped lower through channel, so that the upper end parts of the support of the steel tube support area 3 and the full framing area 4 form an arc-shaped support surface, and the arc-shaped surface of the shaping steel die 10 is matched with a template 15 supported on the support surface formed by the support of the steel tube support area 3 and the full framing area 4 to form an arc-shaped bottom die of the cast-in-situ box girder 1; the steel pipe support area 3 and the support jacking of the full framing area 4 are provided with steel pipe longitudinal distribution beams 16, the steel pipe longitudinal distribution beams 16 are installed after being bent into corresponding radians, the steel pipe longitudinal distribution beams 16 are provided with square timber transverse distribution beams 17, and the templates 15 are supported on the square timber transverse distribution beams 17.
The egg-shaped lower through passage has more arc surfaces at the cast-in-situ part, and the template at the part with smaller curvature change of the cast-in-situ part adopts the bamboo plywood with delta=15 mm, and the box girder end part adopts the shaping steel mould within the range of 2 m.
Because the top of the lower through passage of the bridge is of an arc-shaped structure, the load can generate horizontal load on the bracket under the action of the load, the steel pipe upright post 5 is arranged in the steel pipe bracket area 3, and the bottom end of the steel pipe upright post 5 is directly supported on the concrete foundation 8 and welded with the embedded steel plate in the concrete foundation 8; for clear and definite structural stress, prevent that concrete corner position from being destroyed under the load effect be provided with pre-buried steel sheet in the preformed hole 7 of abutment, the tip that girder 6 inserted in preformed hole 7 welds with the pre-buried steel sheet in the preformed hole 7, girder 6 other end overlap joint is at the top that corresponds steel pipe stand 5 and through bolt fixed connection.
In this embodiment, the downward through channel and the upper bridge form a certain included angle, that is, the axial center line of the downward through channel and the center line of the bridge structure form a certain included angle, the supports of the steel pipe support area 3 form an oblique crossing arrangement along the axial center line of the downward through channel, the supports of the full framing area 4 form an orthogonal arrangement along the center line of the bridge structure, and the transition area between the steel pipe support area 3 and the full framing area 4 is encrypted by the supports of the full framing area 4. Because the bowl buckle frame cannot be installed in the oblique crossing partial area of the full framing and the steel pipe bracket according to the standard interval, the bowl buckle frame in the partial area is installed according to the requirement, and the installation principle is as follows: the stressed area of a single steel pipe in the web area is not more than 30cm multiplied by 60cm; when the stress area of a single steel pipe in the rest area is not more than 60cm multiplied by 60cm, in the field control, the diagonal area is installed according to 30cm, namely when the distance is more than 30cm, one vertical rod is additionally arranged, in order to enhance the overall performance of the steel pipe, the support of the steel pipe support area 3 is connected with the support of the full framing area 4 through a plurality of steel pipe fasteners which are vertically arranged at a certain distance, and the supports of the two areas form an overall common stress system.
In the embodiment, the application of the channel bridge engineering under the hatching garden of the International bioindustry city of the adult world is taken as an example, the main bridge adopts an elliptic flat curved surface, the major axis of the ellipse is 19m, the minor axis is 5m, and the maximum clear span is 38m. In order to lighten the dead weight of the bridge structure, a multi-box structure is adopted, a two-way prestress is adopted, a main bridge is divided into two bridges to be arranged, the width of a single bridge is 20m, the main bridge is obliquely crossed by 20 degrees, the transverse slope of the top and the bottom is 1.5%, the arc section of the main bridge box girder in the bearing platform area adopts a steel tube type steel bracket considering that the span of the bracket is lower, the rest area adopts a floor type full framing to carry out cast-in-situ construction, and the erection height of the bracket is 3 m-8.5 m.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The utility model provides a cast-in-place case roof beam support template system of egg type under pass-through road bridge which characterized in that: the supporting area of the cast-in-situ box girder (1) is divided into an arc-shaped template area (2), a steel pipe support area (3) and a full framing area (4), the arc-shaped template area (2) is closely abutted to pier studs, the arc-shaped template area (2) and the steel pipe support area (3) are correspondingly provided with a box girder end supporting structure, the box girder end supporting structure comprises a plurality of steel pipe uprights (5) and girders (6) erected on the steel pipe uprights (5), the steel pipe uprights (5) are distributed at equal intervals along the axial direction of a lower punching channel, each steel pipe upright (5) is provided with a girder (6) which is horizontally arranged, one end of each girder (6) is erected at the upper end of the steel pipe upright (5), the other end of each girder is arranged in a preformed hole (7) of a bridge abutment, the bottom end of each steel pipe upright (5) is supported on a concrete foundation (8) at the bottom of the lower punching channel, a plurality of template distributing beams (9) which are axially arranged along the lower punching channel are arranged on the girder (6) corresponding to the arc-shaped template area (2), the girders (10) are arranged on the girder (3) corresponding to the steel pipe support (3) along the axial direction of the lower punching channel, the girder (11) are arranged on the girder (3), the shaping steel mould (10) of the arc-shaped template area (2), the steel pipe support area (3) and the support of the full framing area (4) jointly form a support system of the template at the bottom of the cast-in-situ box girder (1);
the steel pipe stand column (5) is arranged in the steel pipe support area (3), and the bottom end of the steel pipe stand column (5) is directly supported on the concrete foundation (8) and welded with the embedded steel plate in the concrete foundation (8);
the steel pipe support area (3) and the full framing area (4) are both provided with bowl buckle supports (13), the setting-up direction of the bowl buckle supports (13) of the steel pipe support area (3) is consistent with the arrangement direction of the support distribution beams (11), namely, the bowl buckle supports (13) of the full framing area (4) are set up along the axial direction of the lower through channel, and the web (12) of the cast-in-situ box beam (1) is set up along the trend parallel to the web;
the space between the bowl buckle supports (13) in the steel pipe support area (3) is smaller than the space between the bowl buckle supports (13) in the full framing area (4), and the space between the bowl buckle supports (13) in the corresponding area of the web (12) of the cast-in-situ box girder (1) in the full framing area (4) is smaller than the space between the bowl buckle supports (13) in the corresponding area of the cavity (14) of the cast-in-situ box girder (1) in the full framing area (4);
the upper end face of the shaping steel die (10) is arc-shaped, arc-shaped supporting faces are formed at the upper end parts of the supports of the steel tube support area (3) and the full framing area (4), and the arc-shaped faces of the shaping steel die (10) are matched with templates (15) supported on the supporting faces formed by the supports of the steel tube support area (3) and the full framing area (4) to form an arc-shaped bottom die of the cast-in-situ box girder (1);
a steel pipe longitudinal distribution beam (16) is arranged on the support jacking of the steel pipe support area (3) and the full framing area (4), the steel pipe longitudinal distribution beam (16) is installed after being bent into a corresponding radian, a square timber transverse distribution beam (17) is arranged on the steel pipe longitudinal distribution beam (16), and the template (15) is supported on the square timber transverse distribution beam (17);
the lower through channel and the upper bridge form a certain included angle, namely the axial center line of the lower through channel and the center line of the bridge structure form a certain included angle, the brackets of the steel pipe bracket area (3) are arranged in an oblique way along the axial center line of the lower through channel, the brackets of the full framing area (4) are arranged in an orthogonal way along the center line of the bridge structure, and the transition area between the steel pipe bracket area (3) and the full framing area (4) is arranged in an encrypted way by the brackets of the full framing area (4);
the supports of the steel pipe support area (3) are connected with the supports of the full framing area (4) through a plurality of steel pipe fasteners which are vertically arranged at a certain interval, and the supports of the two areas form an integral common stress system.
2. An egg-shaped under pass-through bridge cast-in-place box girder support template system according to claim 1, wherein: the steel pipe stand column (5) is arranged at a position corresponding to the web (12) of the cast-in-situ box girder (1), and the main girder (6) is arranged along the length direction of the web (12) of the cast-in-situ box girder (1) and is positioned under the web (12).
3. An egg-shaped under pass-through bridge cast-in-place box girder support template system according to claim 1, wherein: the bridge abutment is characterized in that an embedded steel plate is arranged in a preformed hole (7) of the bridge abutment, the end part of the main beam (6) inserted into the preformed hole (7) is welded with the embedded steel plate in the preformed hole (7), and the other end of the main beam (6) is lapped at the top end of a corresponding steel pipe column (5) and fixedly connected with the top end of the corresponding steel pipe column through a bolt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910408667.8A CN110004838B (en) | 2019-05-16 | 2019-05-16 | Egg-shaped lower through road bridge cast-in-situ box girder support template system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910408667.8A CN110004838B (en) | 2019-05-16 | 2019-05-16 | Egg-shaped lower through road bridge cast-in-situ box girder support template system |
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| CN110004838A CN110004838A (en) | 2019-07-12 |
| CN110004838B true CN110004838B (en) | 2023-11-10 |
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| CN110777663A (en) * | 2019-10-31 | 2020-02-11 | 中交路桥华南工程有限公司 | Curved surface support |
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