CN105839541B - Construction method and structure of No. 0 section non-welding bracket of rigid frame bridge - Google Patents
Construction method and structure of No. 0 section non-welding bracket of rigid frame bridge Download PDFInfo
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- CN105839541B CN105839541B CN201610275632.8A CN201610275632A CN105839541B CN 105839541 B CN105839541 B CN 105839541B CN 201610275632 A CN201610275632 A CN 201610275632A CN 105839541 B CN105839541 B CN 105839541B
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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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- 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
- E01D21/10—Cantilevered erection
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Abstract
The invention discloses a construction method and a structure of a No. 0 section non-welding bracket of a rigid frame bridge, wherein the construction method comprises the following steps: A. pouring pier columns, and reserving bracket setting spaces on two sides of the top of each pier column respectively; B. leveling a fulcrum at a reserved bracket setting space, placing a sand cylinder, and adjusting elevation; C. 3 main longitudinal beams are placed on the sand cylinder, and the upper flanges of the adjacent 2 main longitudinal beams are welded and connected; D. 1 support cushion reinforcing steel bar is arranged at the top of the middle positions of the 3 main longitudinal beams; E. a transverse overload beam is arranged on the support cushion steel bar; F. arranging a bottom die system and other bracket systems on the transverse overload beam; G. pouring a No. 0 section of the box girder; H. removing all the bracket systems; J. reinforced concrete at the space where the support is arranged is reserved in the repairing pier column. The method and the structure are used for constructing the No. 0 section, so that the safety risk is reduced, the bridge quality can be ensured, the construction period is shortened, and the construction cost is reduced.
Description
Technical Field
The invention relates to a construction method and a structure of a bridge support, in particular to a construction method and a structure of a No. 0 section non-welding support of a rigid frame bridge.
Background
Rigid frame bridges generally consist essentially of a number 0 section, a standard section, a cast-in-place section, and a closure section. The first step is to construct the No. 0 section, then construct the standard section and cast-in-situ section, and finally construct the closure section. The current No. 0 section is constructed basically in the following manner in the construction process: welding brackets on the constructed pier columns, erecting longitudinal and transverse distribution beams on the brackets, erecting templates on the longitudinal and transverse distribution beams to form a bracket system, pouring box beams, and finally dismantling the brackets. The construction method has the following problems: the bracket is welded on the embedded part of the pier column, the bracket is cut off when the bracket is dismantled, the bracket is required to be operated at high altitude, the dead time is long, so that the safety in the construction process is reduced, the quality of the bridge can be reduced due to the cutting effect, the working period in the whole construction process is long, and the cost is relatively high. The traditional support structure is not clear enough in stress, so that partial support points are stressed too much, partial support points are stressed less, potential safety hazards are brought, the traditional support structure is complex, partial materials cannot be recycled, and only waste materials can be treated; the bracket is made of more materials and longer in time.
Disclosure of Invention
The invention aims to provide a construction method and a construction structure of a No. 0 section non-welding bracket of a rigid frame bridge. The method and the structure are used for constructing the No. 0 section, so that the safety risk is reduced, the bridge quality can be ensured, and meanwhile, the bracket has a simple structure, definite stress and high controllability; all materials can be recycled, so that the method is energy-saving and environment-friendly, shortens the construction period and reduces the construction cost.
The technical scheme of the invention is as follows: the construction method of the No. 0 section non-welding bracket of the rigid frame bridge can be used for construction when the left side and the right side of the pier column are respectively wider than the No. 0 section bottom plate by 40 cm to 60cm, and the construction method comprises the following steps:
A. pouring the pier body, and reserving spaces at two sides of the tops of 2 pier columns of the pier body respectively;
B. leveling a fulcrum at the reserved space, placing a sand cylinder, and adjusting elevation;
C. placing 1 or 3 main stringers on a sand cylinder;
D. the top of the middle position of the main longitudinal beam is fixedly provided with 1 support cushion reinforcing steel bar;
E. a transverse overload beam is arranged on the support cushion steel bar;
F. arranging a bottom die and other bracket systems on the transverse overload beam;
G. pouring a No. 0 section of the box girder;
H. removing all the bracket systems;
J. and (5) repairing reinforced concrete at the reserved space of the pier stud.
In the aforementioned construction method for the no-welding bracket of the rigid frame bridge No. 0 section, in the step C, when the number of main longitudinal beams is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams are welded and connected.
In the construction method of the No. 0 section non-welding bracket of the rigid frame bridge, in the step C, when the number of the main longitudinal beams is 3, the integral vertical stiffening plates are welded between the adjacent 2 main longitudinal beams.
In the construction method of the No. 0 section non-welding bracket of the rigid frame bridge, when the pier stud is poured in the step A, the embedded part of the operation platform is reserved at the position 50-100 cm below the reserved space of the pier stud.
In the aforementioned construction method of the rigid frame bridge No. 0 section non-welding bracket, in the step F, when other bracket systems are erected, the longitudinal overload beams of the flange plate support bracket are placed at the two ends of the top of the adjacent transverse overload beams at the two sides of each pier column.
A No. 0 section of rigid frame bridge is free of welding support structure, sand barrels are respectively arranged at reserved space positions on the left side and the right side of the tops of 2 pier columns, 1 or 3 main longitudinal beams are arranged on the sand barrels, support cushion reinforcing bars are arranged on the tops of the middle positions of the main longitudinal beams, transverse overload beams are arranged on the support cushion reinforcing bars on the two sides of the pier columns, and a bottom die system and other support systems are arranged on the transverse overload beams.
The No. 0 section of the rigid frame bridge has no welding support structure, and when the number of the main longitudinal beams is 3, the integral vertical stiffening plates are welded between every two adjacent 2 main longitudinal beams.
And when the number of the main longitudinal beams is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams are welded and connected.
In the No. 0 section non-welding bracket structure of the rigid frame bridge, the embedded part of the operation platform is reserved at the position 50-100 cm below the reserved space bottom of the pier column.
In the No. 0 section non-welding support structure of the rigid frame bridge, the longitudinal overload beams of the flange plate support supports are placed at two ends of the tops of the adjacent transverse overload beams at two sides of each pier column.
The invention has the beneficial effects that: compared with the prior art, the construction method and structure of the invention have the following advantages:
1. the bracket is not required to be erected by erecting the bracket, so that welding and later cutting work of the bracket are not required in the whole construction process, the dead time of workers is shorter, and the safety is enhanced;
2. the bracket is not required to be erected by erecting the bracket, so that the damage to the pier column during welding and cutting the bracket can be avoided, and the bridge construction quality is improved;
3. the bracket erecting and cutting work is not needed, so that the construction period of the bridge is shortened, and meanwhile, the labor expenditure is saved;
4. the bracket is not required to be erected, so that the bracket is not required to be assembled in the early stage, and materials for assembling the bracket are saved;
5.5. the whole process uses the formed product, so that the method is convenient and simple to use, and all materials can be recycled; moreover, temporary workpieces are not used, so that the bridge quality is more ensured;
6. the supporting points in the whole bracket system are stressed clearly, so that the controllability is high and the safety is better.
In general, the method and the structure are used for constructing the No. 0 section, so that the safety risk is reduced, the safety is high, the bridge quality is ensured, meanwhile, the bracket structure is simple, the construction period is shortened, the construction cost is reduced, the construction period can be shortened by 15 days in the construction process of the No. 0 section, and the cost can be saved by up to 12 ten thousand.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 shows the pier stud structure after casting;
reference numerals: the concrete bridge comprises the following components of a 1-pier stud, a 2-reserved space, a 3-sand cylinder, a 4-main longitudinal beam, 5-support reinforcing steel bars, a 6-transverse overload beam, a 7-bottom die system, 8-other bracket systems, 9-integral vertical stiffening plates, 10-complement reinforced concrete and 11-flange plate support brackets.
Detailed Description
Embodiments of the invention: the construction method of the No. 0 section non-welding bracket of the rigid frame bridge can be used for construction when the left side and the right side of the pier column are respectively wider than the No. 0 section bottom plate by 40 cm to 60cm, and the construction method comprises the following steps:
A. firstly, pouring a pier body, wherein the pier body is composed of 2 pier columns, namely an A column and a B column. 1 reserved space is respectively arranged on two sides of the top of each pier stud and is used for erecting a bracket;
B. then leveling supporting points at the reserved space respectively, placing sand cylinders, and adjusting elevation;
C. then, placing 1 or 3 main stringers on each sand cylinder at two sides of the pier stud, wherein the main stringers span 2 pier studs, the number of the main stringers to be placed is odd, and if the number of the main stringers is even, transverse distribution is needed, so that a bracket system is complicated;
D. and then 1 supporting pad reinforcing steel bars are fixedly arranged at the tops of the middle positions of the whole main longitudinal beams on two sides in the same direction respectively, stress can be more definite through arranging the supporting pad reinforcing steel bars, the stress is mainly concentrated and distributed at the center position of the main longitudinal beams, and gravity can be more effectively and definitely distributed on the sand cylinder and transferred to the pier columns.
E. A plurality of transverse overload beams are arranged on the 2 support cushion steel bars;
F. setting a bottom die system and other bracket systems on the transverse overload beam, wherein the whole bracket system is formed by a sand cylinder, a main longitudinal beam, a support reinforcing steel bar, the transverse overload beam, the bottom die and other bracket systems in the whole process;
G. pouring a No. 0 section of the box girder;
H. removing all the bracket systems;
J. and then the reinforced concrete at the reserved space of the pier column is supplemented by the bottom basket of the hanging basket. So far, the construction of the whole No. 0 section is finished.
In the construction process, when the number of the main longitudinal beams is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams are welded and connected into a whole, and an integral vertical stiffening plate is welded between the adjacent 2 main longitudinal beams, so that the main longitudinal beams bear gravity integrally in the stress process, and the gravity can be distributed on the main longitudinal beams more uniformly. If the number of the main stringers is only 1, the overall requirement on the main stringers is relatively high, and if the number of the main stringers is more than 3, transverse distribution is required.
And (C) reserving an embedded part of an operation platform on the pier column at the position 50-100 cm below the bottom of the reserved space when pouring the pier column in the step A, so that reinforced concrete of the pier column can be conveniently and later completed in the step K.
In the step F, when other bracket systems are erected, the longitudinal overload beams of the flange plate support brackets are placed at the two ends of the tops of the adjacent transverse overload beams at the two sides of each pier stud, and the longitudinal overload beams of the flange plate support brackets are used for supporting the later-stage flange plate brackets.
A No. 0 section of a rigid frame bridge is provided with a welding-free support structure, as shown in figures 1-3, a pier body is composed of 2 pier columns 1, 1 reserved space 2 is reserved on two sides of each pier column 1, a plurality of sand cylinders 3 are placed on the reserved space 2 on each side of each pier column 1, 1 or 3 main longitudinal beams 4 are placed on the sand cylinders 3 on the same side of each 2 pier columns 1, the main longitudinal beams 4 span the left and right adjacent 2 pier columns 1, two ends of the main longitudinal beams extend out of the pier columns 1, 1 supporting cushion reinforcing steel bars 5 are fixedly arranged at the top of the middle position of the integral main longitudinal beam 4 on each side in the same direction, and when the whole support is stressed, the gravity born by the supporting cushion reinforcing steel bars 5 can be loaded to the center of the integral main longitudinal beam 4 more effectively, so that the bearing capacity of the integral main longitudinal beam 4 is more uniform. A plurality of transverse overload beams 6 are transversely placed on the 2 support cushion reinforcing bars 5 on two sides of the pier column 1, two ends of each transverse overload beam 6 extend to the outer side of the pier column 1 respectively, the transverse overload beams 6 are mainly distributed on the support cushion reinforcing bars 5 between the 2 pier columns 1, meanwhile, the transverse overload beams 6 are also distributed at positions, extending out of the pier column 1, on the left side and the right side of each support cushion reinforcing bar 5, in construction, bottom molds 7 and other support systems 8 are paved on the transverse overload beams 6, and the sand cylinders 3, the main longitudinal beams 4, the support cushion reinforcing bars 5, the transverse overload beams 6, the bottom molds 7 and the other support systems 8 form the whole support system. The bracket system of the structure does not need to be supported by erecting brackets, and the bracket system transfers weight to the pier column in the pouring process through the ingenious structure among the main longitudinal beam 4, the support cushion reinforcing steel bars 5 and the transverse overload beam 6. In the whole support process of the support, the gravity borne by the transverse overload beam 6 is totally applied to the 2 support cushion reinforcing bars 5, the gravity is transmitted to the main longitudinal beam 4 through the support cushion reinforcing bars 5, and the number of the support cushion reinforcing bars 5 at each side is 1, so that the stress of the support points is uniform, the stress is clear, and the safety is improved.
When the number of the main longitudinal beams 4 is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams 4 are welded and connected into a whole, and the whole vertical stiffening plates 9 are welded between the adjacent 2 main longitudinal beams 4, so that the main longitudinal beams 4 bear gravity wholly in the stress process, and the gravity can be distributed on the main longitudinal beams 4 more uniformly and bear larger gravity.
The pier column 1 at the position 50-100 cm below the bottom of the reserved space 2 is provided with an embedded part which is mainly used for setting up an operation plane in the later stage, so that reinforced concrete at the position of the reserved space 2 can be conveniently and fully filled in the later stage. From fig. 3 it can be seen where the completed reinforced concrete 10 is.
Due to the existence of the pier column 1, the transverse overload beam 6 cannot be placed between the support cushion steel bars 5 at the two sides of the position of the pier column 1, so that the longitudinal overload beam 11 of the flange support bracket is placed on the beam body of the transverse overload beam 6 extending out of the pier column 1 for facilitating the erection of the flange support bracket, the longitudinal overload beam 11 of the flange support bracket cannot interfere with the pier column 1, and the longitudinal overload beam 11 of the flange support bracket is used for supporting the flange support bracket in the later period.
Claims (7)
1. A construction method of a No. 0 section non-welding bracket of a rigid frame bridge is characterized by comprising the following steps: when the left side and the right side of the pier column are respectively wider than the bottom plate with the number 0 section by 40 cm to 60cm, the construction method can be used for construction and comprises the following steps:
A. pouring the pier body, and reserving spaces at two sides of the tops of 2 pier columns of the pier body respectively;
B. leveling a fulcrum at the reserved space, placing a sand cylinder, and adjusting elevation;
C. placing 1 or 3 main stringers on a sand cylinder;
D. the top of the middle position of the main longitudinal beam is fixedly provided with 1 support cushion reinforcing steel bar;
E. a transverse overload beam is arranged on the support cushion steel bar;
F. arranging a bottom die and other bracket systems on the transverse overload beam;
G. pouring a No. 0 section of the box girder;
H. removing all the bracket systems;
J. repairing reinforced concrete at the reserved space of the pier column;
in the step C, when the number of the main longitudinal beams is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams are welded and connected;
in the step C, when the number of the main longitudinal beams is 3, the integral vertical stiffening plates are welded between every two adjacent 2 main longitudinal beams;
and (C) reserving an embedded part of the operation platform at a position 50-100 cm below the reserved space of the pier column when pouring the pier column in the step A.
2. The construction method of the rigid frame bridge No. 0 section non-welding bracket according to claim 1, wherein the construction method comprises the following steps: in the step F, when other bracket systems are erected, the longitudinal overload beams of the flange plate support brackets are placed at the two ends of the tops of the adjacent transverse overload beams at the two sides of each pier column.
3. A rigid frame bridge No. 0 section No. welded support structure in the construction method of the rigid frame bridge No. 0 section No. welded support as claimed in any one of claims 1 to 2, characterized in that: the sand cylinders (3) are respectively arranged in the reserved spaces (2) on the left side and the right side of the top of each pier column (1), 1 or 3 main longitudinal beams (4) are arranged on the sand cylinders (3), support cushion reinforcing bars (5) are arranged on the tops of the middle positions of the main longitudinal beams (4), transverse overload beams (6) are arranged on the support cushion reinforcing bars (5) on the two sides of each pier column, and bottom die systems (7) and other support systems (8) are arranged on the transverse overload beams (6).
4. The rigid frame bridge No. 0 section No. welding bracket structure in the construction method of the rigid frame bridge No. 0 section No. welding bracket according to claim 3, wherein: when the number of the main longitudinal beams (4) is 3, the integral vertical stiffening plates (9) are welded between every two adjacent 2 main longitudinal beams (4).
5. The rigid frame bridge No. 0 section No. welding bracket structure in the construction method of the rigid frame bridge No. 0 section No. welding bracket according to claim 3, wherein: when the number of the main longitudinal beams (4) is 3, the upper flanges and the lower flanges of the adjacent 2 main longitudinal beams (4) are welded and connected.
6. The rigid frame bridge No. 0 section No. welding bracket structure in the construction method of the rigid frame bridge No. 0 section No. welding bracket according to claim 3, wherein: and an embedded part of an operation platform is reserved at a position 50-100 cm below the reserved space (2) of the pier column (1).
7. The rigid frame bridge No. 0 section No. welding bracket structure in the construction method of the rigid frame bridge No. 0 section No. welding bracket according to claim 3, wherein: and longitudinal overload beams (11) of the flange plate support brackets are arranged at two ends of the tops of the adjacent transverse overload beams (6) at two sides of each pier column (1).
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| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
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| DE4306040C2 (en) * | 1993-02-26 | 1995-03-30 | Walter Dipl Ing Komm | Method and device for the transverse displacement of bridge components manufactured at heights |
| JPH11131426A (en) * | 1997-10-30 | 1999-05-18 | Takenaka Seisakusho:Kk | Bridge falling preventing device |
| JP4363542B2 (en) * | 2003-03-04 | 2009-11-11 | 三井住友建設株式会社 | Bridge construction method |
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| JP5050228B2 (en) * | 2005-11-10 | 2012-10-17 | 株式会社横河ブリッジ | Ramen bridge construction method with cane member |
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| CN104452598A (en) * | 2014-11-25 | 2015-03-25 | 中建六局第三建筑工程有限公司 | Construction method for water pier super-long pre-stressed cap beam construction supporting system |
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