CN111455800B - Construction method of double-layer double-width bridge with wide top and narrow bottom - Google Patents
Construction method of double-layer double-width bridge with wide top and narrow bottom Download PDFInfo
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- CN111455800B CN111455800B CN202010172330.4A CN202010172330A CN111455800B CN 111455800 B CN111455800 B CN 111455800B CN 202010172330 A CN202010172330 A CN 202010172330A CN 111455800 B CN111455800 B CN 111455800B
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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
- E01D1/00—Bridges in general
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
Abstract
The invention discloses a construction method of a double-layer double-width bridge with a wide top and a narrow bottom, which relates to the technical field of bridge construction and comprises the following steps: step S1, constructing a lower bridge pier of the bridge, wherein the lower bridge pier comprises a left amplitude region and a right amplitude region, a first support is erected in the left amplitude region, and a first lower beam is poured on the first support; step S2, constructing an upper bridge pier of the bridge, transversely moving the first lower beam on the first support to the right area, and pouring a second lower beam on the first support; step S3, erecting a second support on the first lower-layer beam, and pouring a first upper-layer beam on the second support; step S4, transversely moving the second support to the second lower-layer beam, and pouring a second upper-layer beam on the second support; and step S5, respectively traversing the first lower beam and the second lower beam to a preset position. The invention can reduce the support size, is simple to install and dismantle and reduces the construction cost.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method of a double-layer double-width bridge with a wide upper part and a narrow lower part.
Background
In the current domestic bridge engineering, referring to fig. 1, for a double-deck double-width bridge with a wide top and a narrow bottom, wherein the central lines of the beams of the upper and lower decks are not coincident, and L1 is greater than L2, the construction is generally carried out by using full framing. The construction method needs to set up two brackets below the lower bridge; after the construction of the lower bridge is finished, two supports are erected below the upper bridge, and the construction method has the following problems:
1. the whole support is large in size, difficult to install and dismantle and high in cost, and particularly in areas with poor geological conditions and difficult construction of the upright pile foundations of the support, the support erection cost is increased greatly;
2. in the support of the upper-layer bridge, part of support stand columns fall on the lower-layer bridge, the other part of the support stand columns fall on the ground, the length difference of the support stand columns is large, the support stand columns are not uniformly settled, and safety risks exist;
3. when the upper bridge is constructed, the construction load born by the lower bridge is asymmetric, so that the lower bridge is subjected to a larger torque, and the stress of the lower bridge structure also has a safety risk.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a double-layer double-width bridge with a wide upper part and a narrow lower part, which is used for solving the problems of large whole support body, difficulty in installation and removal and high cost in the existing construction method.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a construction method of a double-layer double-width bridge with a wide top and a narrow bottom comprises the following steps:
s1, constructing a lower layer pier of the bridge, wherein the lower layer pier comprises a left amplitude region and a right amplitude region, a first support is erected in the left amplitude region, and a first lower layer beam is poured on the first support;
s2, constructing an upper layer pier of the bridge, transversely moving the first lower layer beam on the first support to the right width area, and pouring a second lower layer beam on the first support;
s3, erecting a second support on the first lower-layer beam, and pouring a first upper-layer beam on the second support;
s4, transversely moving the second support to the second lower-layer beam, and pouring a second upper-layer beam on the second support;
and S5, respectively moving the first lower layer beam and the second lower layer beam to a preset position in a transverse mode.
On the basis of the above technical solution, in step S2:
and after the first lower beam is transversely moved to the right amplitude area, the central line of the first lower beam is superposed with the central line of a preset theoretical first upper beam.
On the basis of the above technical solution, in step S2:
and after the second lower-layer beam is poured, the central line of the second lower-layer beam is superposed with the central line of a preset theoretical second upper-layer beam.
On the basis of the above technical solution, in step S3:
the center line of the second support is superposed with the center line of the first lower beam.
On the basis of the above technical solution, in step S4:
and the central line of the second support is superposed with the central line of the second lower-layer beam.
On the basis of the above technical solution, step S2 specifically includes the following steps:
and arranging a first slide way beam on the lower layer pier, and transversely moving the first lower layer beam to the right amplitude area through the first slide way beam.
On the basis of the above technical solution, step S4 specifically includes the following steps:
and second slideway beams are arranged on the first lower beam and the second lower beam, and the second support is transversely moved to the second lower beam through the second slideway beams.
On the basis of the above technical solution, step S4 specifically includes the following steps:
and arranging a sand cylinder on the second support, separating the second support from the first upper beam by using the sand cylinder, and transversely moving the second support to the second lower beam.
On the basis of the above technical solution, step S1 specifically includes the following steps:
and constructing the lower layer pier and erecting the first support of the bridge synchronously.
On the basis of the above technical solution, step S2 specifically includes the following steps:
and synchronously constructing the upper layer bridge pier and the first lower layer beam of the bridge in a transverse moving mode.
Compared with the prior art, the invention has the advantages that:
according to the construction method of the double-layer double-width bridge with the wide upper part and the narrow lower part, only one first support needs to be erected below the lower-layer bridge, and after the lower-layer bridge is constructed, one second support is erected below the upper-layer bridge, only two supports are needed, so that the support size is reduced, the installation and the removal are relatively simple, the construction cost is reduced, and the construction safety risk is low.
Drawings
FIG. 1 is a schematic structural view of a wide-top and narrow-bottom double-deck bridge with non-coincident centerlines of upper and lower deck beams;
FIG. 2 is a flow chart of a construction method of a double-deck double-width bridge with a wide top and a narrow bottom in the embodiment of the invention;
FIG. 3 is a diagram illustrating step S1 according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating step S2 according to an embodiment of the present invention;
FIG. 5 is another diagram illustrating step S2 according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating step S3 according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating step S4 according to an embodiment of the present invention;
FIG. 8 is another diagram illustrating step S4 according to an embodiment of the present invention;
FIG. 9 is a right side view of FIG. 7;
FIG. 10 is a diagram illustrating step S5 according to an embodiment of the present invention;
in the figure: 1. a first bracket; 2. a first side mold; 3. a first lower beam; 4. a second lower beam; 5. a second bracket; 51. a column shoe; 52. a steel pipe frame; 53. a sand cylinder; 54. a cross beam; 55. a Bailey beam; 6. a second side mold; 7. a first upper beam; 8. a second upper beam; 100. a lower pier; 200. an upper layer pier; 300. a first slideway beam; 400. a second skid beam.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 2, an embodiment of the present invention provides a construction method of a double-deck double-width bridge with a wide top and a narrow bottom, including the following steps:
and S1, constructing a lower-layer pier 100 of the bridge, wherein the lower-layer pier 100 comprises a left-width area and a right-width area, erecting a first support 1 in the left-width area, and pouring a first lower-layer beam 3 on the first support 1. Specifically, referring to fig. 3, two detachable first side molds 2 are provided at the first bracket 1, and the two first side molds 2 are assembled as a mold for casting the first lower girder 3. Preferably, the lower bridge pier 100 of the bridge is constructed and the first support 1 is erected synchronously, so that the construction time is saved.
Step S2, constructing the upper bridge pier 200 of the bridge, traversing the first lower beam 3 on the first bracket 1 to the right area, and casting the second lower beam 4 on the first bracket 1. Specifically, referring to fig. 4 and 5, the first side mold 2 is disassembled, the first runner girder 300 is provided on the lower pier 100, and the first lower girder 3 is laterally moved to the right panel area by the first runner girder 300. And then assembling the first side formwork 2, and pouring a second lower-layer beam 4 on the first side formwork 2. Preferably, the upper pier 200 and the first lower beam 3 are constructed in a horizontal moving manner, so that the construction time is saved.
Step S3 is to set up the second bracket 5 on the first lower beam 3 and to cast the first upper beam 7 on the second bracket 5. Specifically, referring to fig. 6, two detachable second side forms 6 are provided on the second bracket 5, and the two second side forms 6 are assembled as a mold for casting the first upper beam 7.
And step S4, transversely moving the second support 5 to the second lower-layer beam 4, and pouring the second upper-layer beam 8 on the second support 5. Specifically, referring to fig. 7 to 9, the second side mold 6 is disassembled, the second runner beam 400 is provided on the first lower beam 3 and the second lower beam 4, and the second bracket 5 is moved to the second lower beam 4 by the second runner beam 400. And assembling the second side formwork 6, and pouring a second upper-layer beam 8 on the second side formwork 6. Preferably, a sand cylinder 53 is provided on the second support 5, the second support 5 is detached from the first upper beam 7 using the sand cylinder 53, and the second support 5 is then laterally moved onto the second lower beam 4. Referring to fig. 9, the second support 5 generally includes a column base 51, a steel pipe frame 52, a sand tank 53, a cross beam 54, and a bery beam 55, the sand tank 53 is disposed between the steel pipe frame 52 and the cross beam 54, and when sand in the sand tank 53 is removed, the cross beam 54 moves downward to separate the second support 5 from the first upper beam 7.
And step S5, respectively traversing the first lower beam 3 and the second lower beam 4 to close to preset positions. Specifically, as shown in fig. 10, the first lower beam 3 and the second lower beam 4 are respectively laterally moved close to a predetermined position by the first chute beam 300.
Compared with the prior art, the construction method of the double-layer double-width bridge with the wide upper part and the narrow lower part only needs to set up one first support 1 below the lower-layer bridge, and after the lower-layer bridge is constructed, one second support 5 is set up below the upper-layer bridge, so that two supports are needed in total, the support size is reduced, the installation and the removal are relatively simple, and the construction cost is reduced.
In a preferred embodiment, as shown in fig. 4, after traversing the first lower beam 3 to the right panel area, the centre line of the first lower beam 3 coincides with the centre line of a predetermined theoretical first upper beam 7. After the second lower beam 4 is poured, the center line of the second lower beam 4 coincides with the center line of a preset theoretical second upper beam 8. When the first upper beam 7 and the second upper beam 8 are constructed, the second support 5 just falls on the first lower beam 3 or the second lower beam 4, the length of the upright columns of the supports is not different, the upright columns of the supports are uniformly settled, and no safety risk exists. At the same time. The construction load born by the first lower beam 3 or the second lower beam 4 is symmetrical, the first lower beam 3 or the second lower beam 4 is not affected by large torque, and the stress does not have safety risk.
As a preferred embodiment, referring to fig. 6 and 8, when the first and second upper girders 7 and 8 are constructed, the center line of the second bracket 5 coincides with the center line of the first lower girder 3 or the second lower girder 4. When the first upper-layer beam 7 and the second upper-layer beam 8 are constructed, the construction load born by the first lower-layer beam 3 or the second lower-layer beam 4 is symmetrical, the first lower-layer beam 3 or the second lower-layer beam 4 is not affected by large torque, and the stress does not have safety risk.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A construction method of a double-layer double-width bridge with a wide top and a narrow bottom is characterized by comprising the following steps:
s1, constructing a lower layer pier (100) of the bridge, wherein the lower layer pier (100) comprises a left amplitude region and a right amplitude region, a first support (1) is erected in the left amplitude region, and a first lower layer beam (3) is poured on the first support (1);
s2, constructing an upper layer pier (200) of the bridge, transversely moving the first lower layer beam (3) on the first support (1) to the right width area, and pouring a second lower layer beam (4) on the first support (1);
s3, erecting a second bracket (5) on the first lower-layer beam (3), and pouring a first upper-layer beam (7) on the second bracket (5);
s4, transversely moving the second bracket (5) to the second lower-layer beam (4), and pouring a second upper-layer beam (8) on the second bracket (5);
and S5, respectively moving the first lower layer beam (3) and the second lower layer beam (4) transversely to close to preset positions.
2. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom according to claim 1, wherein in step S2:
after the first lower beam (3) is transversely moved to the right amplitude area, the center line of the first lower beam (3) is superposed with the center line of a preset theoretical first upper beam (7).
3. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom according to claim 2, wherein in step S2:
and after the second lower-layer beam (4) is poured, the center line of the second lower-layer beam (4) is superposed with the center line of a preset theoretical second upper-layer beam (8).
4. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom according to claim 3, wherein in step S3:
the central line of the second bracket (5) is superposed with the central line of the first lower beam (3).
5. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom according to claim 3, wherein in step S4:
the central line of the second bracket (5) is superposed with the central line of the second lower beam (4).
6. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom as claimed in claim 1, wherein the step S2 specifically comprises the following steps:
and arranging a first slideway beam (300) on the lower layer pier (100), and transversely moving the first lower layer beam (3) to the right amplitude area through the first slideway beam (300).
7. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom as claimed in claim 1, wherein the step S4 specifically comprises the following steps:
and second slideway beams (400) are arranged on the first lower-layer beam (3) and the second lower-layer beam (4), and the second bracket (5) is transversely moved onto the second lower-layer beam (4) through the second slideway beams (400).
8. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom as claimed in claim 1, wherein the step S4 specifically comprises the following steps:
and arranging a sand cylinder (53) on the second bracket (5), separating the second bracket (5) from the first upper beam (7) by using the sand cylinder (53), and transversely moving the second bracket (5) to the second lower beam (4).
9. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom as claimed in claim 1, wherein the step S1 specifically comprises the following steps:
the lower layer pier (100) of the bridge is constructed synchronously, and the first support (1) is erected.
10. The construction method of the double-deck double-width bridge with the wide top and the narrow bottom as claimed in claim 1, wherein the step S2 specifically comprises the following steps:
and synchronously constructing the upper layer pier (200) and the first lower layer beam (3) in a transverse mode.
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| CN202010172330.4A CN111455800B (en) | 2020-03-12 | 2020-03-12 | Construction method of double-layer double-width bridge with wide top and narrow bottom |
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| CN111455800B true CN111455800B (en) | 2021-04-27 |
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| CN112832136B (en) * | 2021-01-06 | 2022-08-30 | 中铁大桥局集团第四工程有限公司 | Cast-in-place support on beam and fractional local preloading method thereof |
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