CN114941292B - Construction process for synchronously constructing box girder partition plates by using hanging basket inner top plate method - Google Patents
Construction process for synchronously constructing box girder partition plates by using hanging basket inner top plate method Download PDFInfo
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- CN114941292B CN114941292B CN202210520848.1A CN202210520848A CN114941292B CN 114941292 B CN114941292 B CN 114941292B CN 202210520848 A CN202210520848 A CN 202210520848A CN 114941292 B CN114941292 B CN 114941292B
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000005192 partition Methods 0.000 title claims abstract description 58
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims abstract description 12
- 230000009194 climbing Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000011900 installation process Methods 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention provides a construction process for synchronously constructing a box girder and a partition plate by a hanging basket inner top plate method. According to the invention, a set of supporting system is added below a partition plate by using a hanging basket, a climbing cone is embedded in a box girder web plate position to install a transverse inner sliding girder and then a trailing girder, a hanging point extension hanging strip is additionally arranged on a front upper cross beam of the hanging basket, the front end of the longitudinal inner sliding girder is connected with the extension hanging strip, and the rear end of the longitudinal inner sliding girder is placed on a transverse inner sliding girder and then a trailing girder Liang Gunzhou; and the truss sheet is arranged above the longitudinal inner sliding beam to support the inner top plate, so that the synchronous pouring of the partition plate and the section box beam is realized, the concentrated stress of the intersection section is effectively transferred, and the integral stress characteristic of the triangular section intersection section of the open web rigid frame bridge is met.
Description
Technical Field
The invention belongs to the technical field of open-web rigid frame bridge construction, and particularly relates to a construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method.
Background
The hollow rigid frame bridge has the advantages of light structure, high strength, quick installation and various shapes, and is widely applied to the construction of large-span bridges at home and abroad. Along with the construction of bridges such as a Beijing bridge, a Gan Xi extra-large bridge, a Chongqing Jiajia river bridge and the like, the construction of the open web rigid frame bridge is more and more common.
The open web rigid frame bridge is a new improvement on the form of a conventional continuous rigid frame bridge, and is characterized in that a web plate at the root of a box girder is hollowed, and the open web area with the same continuous curve change as that of a solid web girder section is formed by reasonably determining the height of the root, the length of an open web area, the upper chord Liang Duangao degrees and the lower chord Duan Gao degrees. The hollow rigid frame bridge has the characteristics of small dead weight, strong spanning capability and the like, and is suitable for complex terrains in mountain areas. The bridge superstructure comprises a 0# block, an upper chord of the inclined leg, a lower chord of the inclined leg, a triangular intersection area, a cantilever T structure and a closure section. The upper chord and the lower chord of the hollow rigid frame bridge are closed up and down at the intersection section of the triangular area, and in order to avoid stress concentration of the intersection section, partition plates are designed in the cast-in-situ box girder of the intersection section for stress transition.
The traditional partition construction process adopts a bracket post-pouring method, namely, after the section hanging basket is taken out, a bracket is erected in the box girder inner box to pour the partition. The precedent engineering is a partition post-pouring process, the integrity of the partition and the box girder cannot be guaranteed, so that stress cannot be effectively transferred, the connection quality of the embedded bars of the partition is uncontrolled, and the construction period is long.
Disclosure of Invention
The invention aims to provide a construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method, which solves the technical problems in the prior art.
Therefore, the technical scheme provided by the invention is as follows:
a construction process for synchronously constructing a box girder and a partition plate by a hanging basket inner top plate method comprises the steps of setting a supporting system below the inner box partition plate by using the hanging basket after the prestress construction of the crossing section of a hollow rigid frame bridge is finished, installing the inner top plate on the supporting system, binding reinforcing steel bars on a box girder bottom plate, a web plate, the partition plate and the top plate, and finally realizing synchronous pouring of the box girder and the partition plate.
The support system comprises a transverse inner sliding beam rear towing beam and a longitudinal inner sliding beam, one end of the longitudinal inner sliding beam is connected with a long hanging strip, the other end of the longitudinal inner sliding beam is arranged on the transverse inner sliding beam rear towing beam, the long hanging strip is arranged on a front upper cross beam of the hanging basket, a truss sheet is arranged on the longitudinal inner sliding beam, and the inner top plate is arranged on the truss sheet.
A construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method comprises the following specific steps:
after the prestress construction of the intersection section is completed, moving the hanging basket of the hollow rigid frame bridge forward to a proper position, adjusting the bottom basket of the hanging basket to a designed elevation upwards, and then adjusting the elevation of a side model;
step 2) installing a supporting system, and then installing an inner top plate on the supporting system;
the process is as follows:
firstly, mounting a transverse inner sliding beam, then dragging the beam, newly adding two hanging points on the upper beam in front of the hanging basket, and lengthening the hanging strip;
then a longitudinal inner sliding beam is arranged below the inner box partition board, one end of the longitudinal inner sliding beam is connected with a long sling, and the other end of the longitudinal inner sliding beam is arranged on a rear dragging beam of the transverse inner sliding beam;
then, a truss sheet is arranged on the longitudinal inner sliding beam, and finally, an inner top plate is arranged on the truss sheet;
and 3) binding the bottom plate, the web plate, the partition plate and the top plate steel bars in sequence, and performing concrete pouring after installing the prestressed pipeline and the embedded part.
The installation process of the transverse inner sliding beam rear trailing beam in the step 2) is as follows: the two sides of the inner box web are embedded with climbing cones, bracket is installed on the climbing cones, and the bracket is installed with a transverse inner sliding beam and a rear trailing beam.
The transverse inner sliding beam rear towing beam comprises a profile steel beam and two rollers, wherein the two rollers are symmetrically arranged above the profile steel beam and connected with the profile steel beam.
The truss sheets in the step 2) are longitudinally connected into a whole through connecting section steel.
The longitudinal inner sliding beams are profile steel longitudinal beams, and one ends of the two longitudinal inner sliding beams are respectively arranged on two rolling shafts of the transverse inner sliding beam rear towing beam.
And 3) after the concrete is poured, the method further comprises the steps of box girder curing, equal-strength prestress beam penetrating tensioning, hanging basket forward moving, and next-section box girder partition plate construction.
The beneficial effects of the invention are as follows:
according to the construction process for synchronously constructing the box girder partition plate by using the hanging basket inner roof plate method, a set of supporting system is added below the partition plate by using the hanging basket, a climbing cone is embedded in the web plate position of the box girder, a transverse inner girder is installed, a rear dragging beam is dragged, a hanging point extension hanging strip is additionally arranged on the front upper cross beam of the hanging basket, the front end of the longitudinal inner girder is connected with the extension hanging strip, and the rear end of the longitudinal inner girder is placed on the transverse inner girder rear dragging Liang Gunzhou; and the truss sheet is arranged above the longitudinal inner sliding beam to support the inner top plate, so that the synchronous pouring of the partition plate and the section box beam is realized, the concentrated stress of the intersection section is effectively transferred, and the integral stress characteristic of the triangular section intersection section of the open web rigid frame bridge is met.
The rear end of the inner sliding beam is placed on the transverse inner sliding beam rear trailer Liang Gunzhou, and the rolling contact can ensure that the inner sliding beam can directly walk along with the hanging basket when the section of the inner sliding beam is constructed and walks forwards, so that the inner sliding beam and the hanging basket can walk synchronously.
Further details will be described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a diagram of a cast-in-situ box girder spacer design and construction;
FIG. 2 is a side view of the construction of the box girder partition plate by the synchronous construction of the inner top plate of the hanging basket;
FIG. 3 is a partially enlarged view of the structure of FIG. 2A;
FIG. 4 is a cross-sectional view of the construction of the box girder partition plate by the synchronous construction of the suspended basket inner roof plate method of the invention;
FIG. 5 is a front end cross-sectional view of a longitudinal inner slide of the present invention;
FIG. 6 is a rear end cross-sectional view of the longitudinal inner slide of the present invention;
the reference numerals are: 1. a partition plate; 2. hanging basket, 3, adding extension hanging strip; 4. a longitudinal inner sliding beam, a longitudinal inner sliding beam and a longitudinal inner sliding beam; 6. connecting section steel; 7. an inner top plate; 8. a front upper cross member; 9. a transverse inner sliding beam and a rear trailing beam; 10. climbing a cone; 11. a bracket; 12. a roller; 13. a hanging basket bottom basket; 14. hanging basket side mold.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a construction process for synchronously constructing a box girder and a partition plate by a hanging basket inner top plate method, wherein after the prestress construction of the crossing section of a hollow rigid frame bridge is finished, a supporting system is arranged below an inner box partition plate 1 by using a hanging basket 2, an inner top plate 7 is arranged on the supporting system, then, reinforcement binding is carried out on a box girder bottom plate, a web plate, the partition plate 1 and the top plate, and finally, synchronous pouring of the box girder and the partition plate 1 is realized.
According to the invention, the inner top plate 7 is arranged above the support system, so that synchronous pouring of the partition plate 1 and the section box girder is realized, concentrated stress of the intersection section is effectively transferred, and the integral stress characteristic of the triangular section intersection section of the open web rigid frame bridge is satisfied.
Example 2:
on the basis of embodiment 1, this embodiment provides a synchronous construction case roof beam baffle construction process of hanging basket interior roof method, the braced system includes horizontal interior roof beam back trawl beam 9 and vertical interior roof beam 4, long suspender 3 is connected to vertical interior roof beam 4 one end, the other end of vertical interior roof beam 4 is located on horizontal interior roof beam back trawl beam 9, long suspender 3 is located on hanging basket 2 front upper cross beam 8, be equipped with truss piece 5 on the vertical interior roof beam 4, interior roof plate 7 is located on truss piece 5.
According to the invention, the longitudinal inner sliding beam 4 is supported by the transverse inner sliding beam rear towing beam 9 and the long hanging strip 3, and then the truss sheet 5 is arranged on the longitudinal inner sliding beam 4, and the inner top plate 7 is arranged on the truss sheet 5, so that the bottom die for constructing the partition board 1 is supported.
Example 3:
on the basis of the embodiment 1, the embodiment provides a construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method, which is shown in fig. 4, and specifically comprises the following steps:
after the prestress construction of the crossing section of the hollow rigid frame bridge is finished, the hanging basket 2 of the hollow rigid frame bridge is moved forward to a proper position, the hanging basket bottom basket 13 is adjusted upwards to a designed elevation, and then the elevation of the hanging basket side mould 14 is adjusted;
step 2) installing a supporting system, and then installing an inner top plate 7 on the supporting system;
the process is as follows:
firstly, a transverse inner sliding beam is installed, a trailing beam 9 is towed, two hanging points are newly added on an upper cross beam 8 in front of a hanging basket 2, and a hanging strip 3 is lengthened; as shown in fig. 2;
then a longitudinal inner sliding beam 4 is arranged below the inner box partition board 1, one end of the longitudinal inner sliding beam 4 is connected with a long hanging strip 3, and the other end is arranged on a transverse inner sliding beam rear trailing beam 9;
then, a truss sheet 5 is arranged on the longitudinal inner sliding beam 4, and finally, an inner top plate 7 is arranged on the truss sheet 5; as shown in fig. 4 and 5;
and 3) binding the bottom plate, the web plate, the partition plate 1 and the top plate steel bars in sequence, and performing concrete pouring after installing the prestressed pipeline and the embedded part.
The construction diagram of the cast-in-situ box girder partition plate 1 is shown in fig. 1.
According to the construction process for synchronously constructing the box girder partition plate by using the hanging basket inner roof method, a set of supporting system is added below the partition plate 1 by using the hanging basket 2, a climbing cone 10 is embedded in the web plate position of the box girder, a transverse inner girder rear towing beam 9 is installed, a hanging point extension hanging strip 3 is additionally arranged on the front upper cross beam 8 of the hanging basket 2, the front end of a longitudinal inner girder 4 is connected with the extension hanging strip 3, and the rear end of the longitudinal inner girder is placed on a rolling shaft 12 of the transverse inner girder rear towing beam 9; and the truss sheet 5 is arranged above the longitudinal inner sliding beam 4 to support the inner top plate 7, so that the synchronous pouring of the partition plate 1 and the segmental box beam is realized, the concentrated stress of the intersection is effectively transferred, and the integral stress characteristic of the triangular area intersection of the open web rigid frame bridge is satisfied.
Example 4:
on the basis of the embodiment 3, the embodiment provides a construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method, wherein the installation process of the transverse inner girder trailing girder 9 in the step 2) is as follows: the two sides of the inner box web are embedded with climbing cones 10, brackets 11 are arranged on the climbing cones 10, and transverse inner sliding beam rear towing beams 9 are arranged on the brackets 11. As shown in fig. 6.
When in installation, the bracket 11 is firstly installed on the climbing cone 10, and then the electric hoist is adopted to suspend the transverse inner sliding beam and the rear trailing beam 9 on the bracket 11 of the inner box web plate, so that bolts are fastened.
Example 5:
on the basis of embodiment 3, this embodiment provides a synchronous construction box girder baffle construction process of roof board method in hanging basket, horizontal interior slide back trawl 9 includes shaped steel crossbeam and roller bearing 12, roller bearing 12 is two, two roller bearing 12 symmetry locate shaped steel crossbeam top and be connected with shaped steel crossbeam.
The two rollers 12 allow the longitudinal inner slide 4 to be freely adjusted in horizontal inclination and moved back and forth. The rear end of the inner sliding beam 4 is placed on the roller 12 of the transverse inner sliding beam rear towing beam 9, and the rolling contact can ensure that the inner sliding beam 4 can directly walk along with the hanging basket 2 when the section of the inner sliding beam 4 walks forwards after construction, and the inner sliding beam 4 and the hanging basket 2 can walk synchronously.
Example 6:
on the basis of the embodiment 3, the embodiment provides a construction process for synchronously constructing the box girder partition plates by a hanging basket inner top plate method, wherein truss sheets 5 in the step 2) are longitudinally connected into a whole through connecting section steel 6. As shown in fig. 3.
The longitudinal inner slide beams 4 are longitudinally arranged, and the truss sheets 5 are transversely arranged above the two longitudinal inner slide beams 4, and the truss sheets 5 can swing in the front-back direction due to a certain height, so that the truss sheets 5 are longitudinally connected into a whole by the connecting section steel 6, and the stability is improved.
Example 7:
on the basis of embodiment 5, this embodiment provides a synchronous construction box girder baffle construction process of hanging basket inside roof method, vertical interior slide 4 is shaped steel longeron, vertical interior slide 4 is two and one end is put respectively on two roller bearings 12 of horizontal interior slide back trawl 9.
The longitudinal inner sliding beam 4 is two profile steel longitudinal beams which are arranged along the longitudinal bridge direction and play a supporting role on the bottom die for the construction of the partition board 1.
Example 8
On the basis of the embodiment 1, the embodiment provides a construction process for synchronously constructing the box girder partition plate by a hanging basket inner top plate method, wherein the step 3) further comprises the steps of box girder curing, equal-strength and prestress beam penetration tensioning after concrete pouring, and the hanging basket 2 moves forward to construct the box girder partition plate 1 of the next section.
And after pouring, tensioning the prestressed tendons to finish the construction of the section box girder.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (7)
1. A construction process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method is characterized by comprising the following steps of: after the prestress construction of the crossing section of the hollow steel bridge is finished, a supporting system is arranged below the inner box partition board, a top plate is arranged on the supporting system, then reinforcing steel bar binding is carried out on the box girder bottom plate, the web plate, the partition board and the top plate, and finally synchronous pouring of the box girder and the partition board is realized;
the method comprises the following specific steps:
after the prestress construction of the intersection section is completed, moving the hanging basket forward to a proper position, adjusting the bottom basket of the hanging basket to a designed elevation upwards, and then adjusting the elevation of the side mould;
step 2) installing a supporting system, and then installing a top plate on the supporting system;
the process is as follows:
firstly, mounting a transverse inner sliding beam, then dragging the beam, newly adding two hanging points on the upper beam in front of the hanging basket, and lengthening the hanging strip;
then a longitudinal inner sliding beam is arranged below the inner box partition board, one end of the longitudinal inner sliding beam is connected with a long sling, and the other end of the longitudinal inner sliding beam is arranged on a rear dragging beam of the transverse inner sliding beam;
then, a truss sheet is arranged on the longitudinal inner sliding beam, and finally, a top plate is arranged on the truss sheet;
and 3) binding the bottom plate, the web plate, the partition plate and the top plate steel bars in sequence, and performing concrete pouring after installing the prestressed pipeline and the embedded part.
2. The construction process for synchronously constructing the box girder partition plates by using the hanging basket inner top plate method according to claim 1 is characterized by comprising the following steps of: the support system comprises a transverse inner sliding beam rear towing beam and a longitudinal inner sliding beam, one end of the longitudinal inner sliding beam is connected with a long hanging strip, the other end of the longitudinal inner sliding beam is arranged on the transverse inner sliding beam rear towing beam, the long hanging strip is arranged on a hanging basket front upper cross beam, a truss sheet is arranged on the longitudinal inner sliding beam, and the top plate is arranged on the truss sheet.
3. The construction process for synchronously constructing the box girder partition plates by using the hanging basket inner top plate method according to claim 1 is characterized by comprising the following steps of: the installation process of the transverse inner sliding beam rear trailing beam in the step 2) is as follows: the two sides of the inner box web are embedded with climbing cones, bracket is installed on the climbing cones, and the bracket is installed with a transverse inner sliding beam and a rear trailing beam.
4. The construction process for synchronously constructing the box girder partition plates by using the hanging basket inner roof method according to claim 1 or 2, which is characterized by comprising the following steps of: the transverse inner sliding beam rear towing beam comprises a profile steel beam and two rollers, wherein the two rollers are symmetrically arranged above the profile steel beam and connected with the profile steel beam.
5. The construction process for synchronously constructing the box girder partition plates by using the hanging basket inner roof method according to claim 1 or 2, which is characterized by comprising the following steps of: the truss sheets in the step 2) are longitudinally connected into a whole through connecting section steel.
6. The construction process for synchronously constructing the box girder partition plates by using the hanging basket inner top plate method, which is disclosed in claim 4, is characterized in that: the longitudinal inner sliding beams are profile steel longitudinal beams, and one ends of the two longitudinal inner sliding beams are respectively arranged on two rolling shafts of the transverse inner sliding beam rear towing beam.
7. A process for synchronously constructing a box girder partition plate by a hanging basket inner top plate method according to any one of claims 1-3, which is characterized in that: and 3) after the concrete is poured, the method further comprises the steps of box girder curing, equal-strength prestress beam penetrating tensioning, hanging basket forward moving, and next-section box girder partition plate construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210520848.1A CN114941292B (en) | 2022-05-13 | 2022-05-13 | Construction process for synchronously constructing box girder partition plates by using hanging basket inner top plate method |
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| CN202210520848.1A CN114941292B (en) | 2022-05-13 | 2022-05-13 | Construction process for synchronously constructing box girder partition plates by using hanging basket inner top plate method |
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| CN114941292B true CN114941292B (en) | 2023-11-14 |
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