CN114960458A - Temporary support for bridge superstructure construction - Google Patents
Temporary support for bridge superstructure construction Download PDFInfo
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- CN114960458A CN114960458A CN202210777951.4A CN202210777951A CN114960458A CN 114960458 A CN114960458 A CN 114960458A CN 202210777951 A CN202210777951 A CN 202210777951A CN 114960458 A CN114960458 A CN 114960458A
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- pair
- steel pipe
- steel
- bailey
- hydraulic jacks
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to the technical field of bridge construction, in particular to a temporary support for bridge superstructure construction. The steel truss comprises a pair of Bailey frames and a pair of cross beams, the Bailey frames are horizontally arranged side by side, the corresponding cross beam is horizontally arranged above each Bailey frame, and each cross beam is fixedly connected with the corresponding Bailey frame through an inclined strut; the supporting mechanism comprises a pair of first steel pipe pile mechanisms and more than one second steel pipe pile mechanisms; the precast beams are uniformly erected at the upper ends of the pair of cross beams through the square timber and are vertically arranged with the pair of cross beams, the two ends of each precast beam are fixed through precast beam inclined struts respectively, and the first hydraulic jack and the second hydraulic jack are adjusted to enable the precast beams to be adjusted to proper heights. Therefore, the invention can avoid the damage of the steel truss caused by torsion; the hydraulic jacks are self-locking hydraulic jacks, so that the self-locking hydraulic jacks can bear loads for a long time, and long-term support is provided for construction of a cast-in-place tie beam.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a temporary support for bridge superstructure construction.
Background
In recent years, with the emphasis of the country on infrastructure construction, bridges with large span and large cross section crossing obstacles are favored by more and more people, and the demand for temporary supports is also increasing.
At present, a bridge construction support is mainly of a steel truss structure formed by building a Bailey beam and steel pipe combined structure, a main truss of the steel truss structure is mainly composed of a pull rod and a compression rod, the requirement on the bending rigidity of a rod piece interface is not large, the steel truss structure can be prefabricated in a factory and is directly hoisted when being transported to a site, but the height of the installed support is difficult to adjust in the staged construction of the bridge upper structure, and the height of a platform is increased by assembling and constructing partial structures of the support needing to be dismantled, so that the material cost and the labor cost are increased, the construction progress is delayed, and the use has limitation.
In addition, under the condition that the geological conditions of bridge construction are not ideal, a small amount of uneven settlement may occur on part of buttresses of the temporary construction support, which causes the risk that the overall rigidity and stability of the support are reduced and even the structural connection is broken due to additional stress such as shear stress, negative bending moment and the like generated by the overall internal structure of the temporary support with uneven stress, and the supporting height of the temporary support is reduced along with the additional stress, thereby affecting the construction of the corresponding part of the bridge.
The tie beam is cast in place by adopting a support, the installation of the steel pipe arch and the tensioning of the suspension rod are finished from the pouring, and the construction period is long, so that the control of the uneven settlement of the support is the key point of the project.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a temporary support for bridge superstructure construction, which has the following specific technical scheme:
a temporary support for bridge superstructure construction comprises a steel truss and a support mechanism supported at the lower end of the steel truss, wherein the steel truss comprises a pair of Bailey frames 11 and a pair of cross beams 12, the pair of Bailey frames 11 are horizontally arranged side by side, a corresponding cross beam is horizontally arranged above each Bailey frame, and each cross beam is fixedly connected with the corresponding Bailey frame through an inclined strut 13;
the supporting mechanism comprises a pair of first steel pipe pile mechanisms and more than one second steel pipe pile mechanisms, the pair of first steel pipe pile mechanisms are correspondingly arranged at two ends of the pair of bailey frames 11, and the more than one second steel pipe pile mechanisms are uniformly arranged in the middle of the pair of bailey frames 11 along the length direction of the pair of bailey frames 11; each first steel pipe pile mechanism comprises a pair of vertically arranged first steel pipe piles 21, a pair of first hydraulic jacks 23 are correspondingly arranged at the upper ends of the pair of first steel pipe piles 21, first double-spliced I-shaped steel beams 22 are arranged at the upper ends of the pair of first hydraulic jacks 23, and the first double-spliced I-shaped steel beams 22 are horizontally arranged perpendicular to the pair of bailey frames 11;
each second steel pipe pile mechanism comprises four vertical second steel pipe piles 31, the four second steel pipe piles 31 are arranged in a square shape, a second hydraulic jack 32 is arranged at the upper end of each second steel pipe pile 31, rectangular steel pipes 33 are horizontally arranged at the upper ends of two second hydraulic jacks 32 corresponding to one sides of the bailey frames, second double-spliced I-shaped steel beams 34 are arranged at the upper ends of a pair of rectangular steel pipes at the upper ends of the four second hydraulic jacks 32, and the second double-spliced I-shaped steel beams 34 are horizontally arranged perpendicular to the pair of bailey frames 11;
when the prefabricated beam device is used, the prefabricated beams 4 are uniformly erected at the upper ends of the pair of cross beams 12 through the square timbers and are vertically arranged with the pair of cross beams 12, two ends of each prefabricated beam 4 are fixed through the prefabricated beam inclined struts 13, and the first hydraulic jacks and the second hydraulic jacks 32 are adjusted, so that the prefabricated beams 4 are adjusted to be at proper heights.
Further, every crossbeam is the triangle with bracing 13 between the corresponding bailey frame and arranges, the upper end and the crossbeam fixed connection of every bracing 13, and the lower extreme of bracing 13 and the side fixed connection of bailey frame, and reinforcing plate 131 has all been welded to every bracing 13 upper end and lower extreme fixed connection department.
Further, a square steel base plate 321 is horizontally distributed at the upper end of the second hydraulic jack 32, and the steel base plate 321 is welded with the corresponding rectangular steel pipe 33.
Further, the upper ends of each first hydraulic jack and each second hydraulic jack 32 are all arranged on the round steel gasket 322, and the first hydraulic jacks and each second hydraulic jack 32 are self-locking hydraulic jacks.
The invention has the beneficial technical effects that:
1. the temporary support for the construction of the upper structure of the bridge comprises a steel truss and a support mechanism, wherein the steel truss comprises a pair of Bailey frames and a pair of cross beams, the pair of Bailey frames are horizontally arranged side by side, the corresponding cross beam is horizontally arranged above each Bailey frame, each cross beam is fixedly connected with the corresponding Bailey frame through an inclined strut in triangular arrangement, the upper end of each inclined strut is fixedly connected with the cross beam, the lower end of each inclined strut is fixedly connected with the side edge of the Bailey frame, and reinforcing plates are welded at the fixed connection positions of the upper end and the lower end of each inclined strut, so that the overall rigidity of the steel truss can be increased, and the stress can be commonly borne by the whole truss; the steel truss structure can be prefabricated in a factory and directly hoisted when being transported to a site, so that potential safety hazards of site construction are reduced, the cost is saved, and the steel truss structure is convenient to dismantle.
2. The support mechanism for supporting the steel truss is arranged at the lower end of the bailey truss and comprises a first steel pipe pile mechanism and a second steel pipe pile mechanism, wherein the first steel pipe pile mechanism and the second steel pipe pile mechanism comprise steel pipe piles and hydraulic jacks arranged at the upper ends of the steel pipe piles, the height of the support mechanism can be conveniently adjusted to offset uneven settlement of a foundation, so that the prefabricated beam reaches a preset height, an ancient trestle below a construction bridge is further protected, and the steel truss is prevented from being damaged by torsion; the first hydraulic jack and the second hydraulic jack both adopt self-locking hydraulic jacks, can bear for a long time and provide long-term support for the construction of a cast-in-place tie beam.
Drawings
Fig. 1 is a schematic structural view of a temporary support for bridge superstructure construction according to the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a view showing a state in which a temporary support for bridge superstructure construction according to the present invention is used.
Wherein: the steel pipe pile supporting structure comprises a pair of bailey frames 11, a pair of cross beams 12, an inclined strut 13, a pair of first steel pipe piles 21, a pair of first hydraulic jacks 23, a first double-spliced I-shaped steel beam 22, a second steel pipe pile 31, a second hydraulic jack 32, a rectangular steel pipe 33, a second double-spliced I-shaped steel beam 34, a reinforcing plate 131, a steel base plate 321, a precast beam 4 and a buttress foundation 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration only.
Examples
A temporary support for bridge superstructure construction comprises a steel truss and a support mechanism supported at the lower end of the steel truss, wherein the steel truss comprises a pair of Bailey frames 11 and a pair of cross beams 12, the pair of Bailey frames 11 are horizontally arranged side by side, a corresponding cross beam is horizontally arranged above each Bailey frame, and each cross beam is fixedly connected with the corresponding Bailey frame through an inclined strut 13;
the supporting mechanism comprises a pair of first steel pipe pile mechanisms and more than one second steel pipe pile mechanisms, the pair of first steel pipe pile mechanisms are correspondingly arranged at two ends of the pair of bailey frames 11, and the more than one second steel pipe pile mechanisms are uniformly arranged in the middles of the pair of bailey frames 11 along the length direction of the pair of bailey frames 11;
each first steel pipe pile mechanism comprises a pair of vertically arranged first steel pipe piles 21, a pair of first hydraulic jacks 23 are correspondingly arranged at the upper ends of the pair of first steel pipe piles 21, first double-spliced I-shaped steel beams 22 are arranged at the upper ends of the pair of first hydraulic jacks 23, and the first double-spliced I-shaped steel beams 22 are horizontally arranged perpendicular to the pair of bailey frames 11;
each second steel pipe pile mechanism comprises four vertical second steel pipe piles 31, the four second steel pipe piles 31 are arranged in a square shape, a second hydraulic jack 32 is arranged at the upper end of each second steel pipe pile 31, rectangular steel pipes 33 are horizontally arranged at the upper ends of two second hydraulic jacks 32 corresponding to one sides of the bailey frames, second double-spliced I-shaped steel beams 34 are arranged at the upper ends of a pair of rectangular steel pipes at the upper ends of the four second hydraulic jacks 32, and the second double-spliced I-shaped steel beams 34 are horizontally arranged perpendicular to the pair of bailey frames 11;
during the use, precast beam 4 evenly overlaps through the square timber and establishes the upper end at a pair of crossbeam 12 to arrange perpendicularly with a pair of crossbeam 12, every precast beam 4's both ends are fixed through precast beam bracing 13 respectively, adjust first hydraulic jack and second hydraulic jack 32, make precast beam 4 adjust to suitable height.
Every crossbeam is the triangle with the bracing 13 that corresponds between the bailey frame and arranges, the upper end and the crossbeam fixed connection of every bracing 13, and the lower extreme of bracing 13 and the side fixed connection of bailey frame, and reinforcing plate 131 has all been welded to every bracing 13 upper end and lower extreme fixed connection department.
A square steel base plate 321 is horizontally distributed at the upper end of the second hydraulic jack 32, and the steel base plate 321 is welded with the corresponding rectangular steel pipe 33; each of the first hydraulic jacks and each of the second hydraulic jacks 32 is a self-locking hydraulic jack.
Therefore, the hydraulic jack is convenient for adjusting the height of the supporting mechanism to offset the uneven settlement of the foundation, so that the precast beam 4 reaches the preset height, and the steel truss is prevented from being damaged by torsion; further when needs protect the ancient plank road of construction bridge below, usable first hydraulic jack and every second hydraulic jack 32 raise whole temporary support. The invention can bear load for a long time and provides long-term support for the construction of the cast-in-place tie beam.
When the temporary support is specifically constructed, the method comprises the following steps:
step 1: the first steel pipe pile and the second steel pipe pile 31 for construction are formed by welding steel plates in a roll mode in a factory, wherein the steel is phi 426 x 8mm, and strength is guaranteed. And a welding platform is arranged on a construction site and used for fixing the steel pipe pile to be welded and ensuring the steel pipe pile to be horizontal, so that the steel pipe pile cannot roll, and the welding strength and the flatness of the whole steel pipe pile are ensured.
Step 2: hoisting the welded first steel pipe pile and the welded second steel pipe pile 31 to an embedded part of the buttress foundation 5 by using a crane, connecting and fixing, welding a circular steel gasket 322 at the upper end of each of the first steel pipe pile and the second steel pipe pile 31 in a full-flow welding mode, and fixedly installing a first hydraulic jack and a second hydraulic jack 32 by leaving a groove on the circular steel gasket 322.
And step 3: the first double-spliced i-section steel beam 22 is hoisted to the first hydraulic jack by a crane,
hoisting a rectangular steel pipe 33 to the upper ends of two second hydraulic jacks 32, respectively placing a square steel gasket 321 on a contact surface, hoisting a second double-spliced I-shaped steel beam 34 to a pair of rectangular steel pipes, building a steel truss at the upper ends of the first double-spliced I-shaped steel beam 22 and the second double-spliced I-shaped steel beam 34, wherein the steel truss is a whole formed by prefabricating in a factory design, installing the whole on the first double-spliced I-shaped steel beam 22 and the second double-spliced I-shaped steel beam 34 on site through a truck crane, connecting and fixing the whole through spot welding, paving a square timber at the top of the steel truss for supporting a main body structure of the bridge, and installing the temporary support substantially.
And 4, step 4: and hoisting the precast beam 4 reaching the designed strength to the laid square timber by using a truck crane, adjusting the first hydraulic jack and the second hydraulic jack 32 to enable the precast beam 4 to reach the designed height after a support measure is made, and detecting the precast beam at regular intervals.
And 5: after the construction of the upper structure of the bridge is finished and sufficient strength is formed, the temporary support is dismantled,
specifically, a crane is used for binding and pre-hoisting the pair of bailey frames 11 by using steel wire ropes, the welding connection between the pair of bailey frames 11 and the pair of cross beams 12, between the first pair of double-spliced i-shaped steel beams 22 and between the second pair of double-spliced i-shaped steel beams 34 is cut, and the bailey frames are lowered to the ground for recycling. The Bailey frames, the cross beams and the double-spliced I-shaped steel beams need to be hung and unloaded in sequence.
Step 6: dismantling the supporting structure, cutting the connection between the pair of first hydraulic jacks 23, the pair of second hydraulic jacks 32 and the pair of first steel pipe piles 21 and the pair of second steel pipe piles 31, respectively taking down the jacks, binding the steel pipe piles by using steel wire ropes for pre-hoisting, cutting the steel pipe piles and the foundation connection roots, and hoisting the steel pipe piles to the ground for recycling.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A temporary support for bridge superstructure construction, its characterized in that: comprises a steel truss and a supporting mechanism supported at the lower end of the steel truss,
the steel truss comprises a pair of bailey frames (11) and a pair of cross beams (12), the pair of bailey frames (11) are horizontally arranged side by side, a corresponding cross beam is horizontally arranged above each bailey frame, and each cross beam is fixedly connected with the corresponding bailey frame through an inclined strut (13);
the supporting mechanism comprises a pair of first steel pipe pile mechanisms and more than one second steel pipe pile mechanisms, the pair of first steel pipe pile mechanisms are correspondingly arranged at two ends of the pair of bailey frames (11), and the more than one second steel pipe pile mechanisms are uniformly arranged in the middle of the pair of bailey frames (11) along the length direction of the pair of bailey frames (11);
each first steel pipe pile mechanism comprises a pair of vertically arranged first steel pipe piles (21), a pair of first hydraulic jacks (23) are correspondingly arranged at the upper ends of the pair of first steel pipe piles (21), a first double-spliced I-shaped steel beam (22) is arranged at the upper ends of the pair of first hydraulic jacks (23), and the first double-spliced I-shaped steel beam (22) is perpendicular to the pair of Bailey frames (11) and horizontally arranged;
each second steel pipe pile mechanism comprises four vertical second steel pipe piles (31), the four second steel pipe piles (31) are arranged in a square shape, a second hydraulic jack (32) is arranged at the upper end of each second steel pipe pile (31), rectangular steel pipes (33) are horizontally arranged at the upper ends of two second hydraulic jacks (32) located on one side of the corresponding bailey truss, second double-spliced I-shaped steel beams (34) are arranged at the upper ends of a pair of rectangular steel pipes at the upper ends of the four second hydraulic jacks (32), and the second double-spliced I-shaped steel beams (34) are horizontally arranged perpendicular to the pair of bailey trusses (11);
during the use, precast beam (4) are evenly set up in the upper end of a pair of crossbeam (12) through the square timber to arrange perpendicularly with a pair of crossbeam (12), the both ends of every precast beam (4) are fixed through precast beam bracing (13) respectively, adjust first hydraulic jack and second hydraulic jack (32), make precast beam (4) adjust to suitable height.
2. A temporary support for bridge superstructure construction according to claim 1, characterized in that: every crossbeam is the triangle with bracing (13) that correspond between the bailey frame and arranges, the upper end and the crossbeam fixed connection of every bracing (13), the lower extreme of bracing (13) and the side fixed connection of bailey frame, and reinforcing plate (131) all weld in every bracing (13) upper end and lower extreme fixed connection department.
3. A temporary support for bridge superstructure construction according to claim 1, characterized in that: the upper end of the second hydraulic jack (32) is horizontally provided with a square steel base plate (321), and the steel base plate (321) is welded with a corresponding rectangular steel pipe (33).
4. A temporary support for bridge superstructure construction according to claim 1, characterized in that: the upper ends of the first hydraulic jacks and the second hydraulic jacks (32) are all arranged on a round steel gasket (322), and the first hydraulic jacks and the second hydraulic jacks (32) are self-locking hydraulic jacks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210777951.4A CN114960458A (en) | 2022-07-04 | 2022-07-04 | Temporary support for bridge superstructure construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210777951.4A CN114960458A (en) | 2022-07-04 | 2022-07-04 | Temporary support for bridge superstructure construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114960458A true CN114960458A (en) | 2022-08-30 |
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ID=82968223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210777951.4A Pending CN114960458A (en) | 2022-07-04 | 2022-07-04 | Temporary support for bridge superstructure construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114960458A (en) |
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2022
- 2022-07-04 CN CN202210777951.4A patent/CN114960458A/en active Pending
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