CN114016424B - Self-propelled platform and method suitable for small-angle oblique crossing bridge construction - Google Patents
Self-propelled platform and method suitable for small-angle oblique crossing bridge construction Download PDFInfo
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- CN114016424B CN114016424B CN202111436653.0A CN202111436653A CN114016424B CN 114016424 B CN114016424 B CN 114016424B CN 202111436653 A CN202111436653 A CN 202111436653A CN 114016424 B CN114016424 B CN 114016424B
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000009434 installation Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
-
- 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
- E01D2101/30—Metal
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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a self-propelled platform and a method suitable for construction of a small-angle oblique crossing bridge, wherein the self-propelled platform comprises a walking track arranged between arch seats at two sides, the walking track is arranged along the longitudinal direction of the bridge, the sliding platform is slidably arranged on the walking track through supporting legs, a detachable arch rib assembling bracket is arranged on the sliding platform, and a plurality of jacking positioning devices are arranged at the top of the arch rib assembling bracket. When the lifting arch rib is used, the lifting arch rib is arranged at the top of the assembly bracket, and the two ends of the arch rib are fixedly connected with the arch base by adjusting the lifting positioning device; sequentially hoisting arch ribs along the longitudinal direction of the bridge, wherein the arch ribs are connected with each other through temporary supports; permanently connecting the arch ribs, dismantling the spliced bracket, and installing the box girder by using the sliding platform; the construction of the bridge arch rib and the girder is realized through the steps. The invention can realize construction crossing existing roads, which are the existing construction routes of other roads or bridges. The arch ribs and the main beams are installed section by section without erecting full supports.
Description
Technical Field
The invention relates to the field of bridge arch rib and girder construction, in particular to a self-propelled platform and method suitable for small-angle oblique crossing bridge construction.
Background
For arch bridge construction crossing the existing road, the installation of the arch ribs and the main beams is limited by the geographic position, the existing traffic and the like, and the problem that large-scale construction equipment cannot participate in construction exists. The existing bridge arch rib with the segmental discontinuous curves is usually erected with a full-framing support for auxiliary installation section by section, but the scheme is extremely low in construction efficiency. Chinese patent CN 206902566U describes a hanging basket for arch rib bridge girder cantilever construction, which utilizes the cantilever structure of the main girder system and the hanging basket structure to assist in installation. The main girder system of this solution needs to be installed above the poured box girder segment 100. CN 110468734A describes a steel arch rib pushing system and a steel arch rib pushing construction method, wherein the steel arch rib pushing system and the steel arch rib pushing construction method are used for continuously pushing the top of the steel arch rib which is formed by continuously arc-shaped in whole. But this solution is not suitable for bridge rib construction of a segmental discontinuous curve.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-propelled platform and a method suitable for construction of a small-angle oblique crossing bridge, which can conveniently realize construction of a bridge arch rib and a girder and greatly improve construction efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a self-propelled platform suitable for construction of low-angle oblique crossing bridge, includes the walking track that sets up between both sides arch seat, and the walking track is along the longitudinal direction of bridge, and sliding platform passes through landing leg slidable mounting on the walking track, is equipped with detachable arch rib on sliding platform and assembles the support, is equipped with a plurality of jacking positioner at the top that the support was assembled to the arch rib.
In the preferred scheme, a movable box is arranged at the bottom of a supporting leg, the top of the movable box is hinged with the supporting leg, the bottom of the movable box is in sliding connection with a walking rail, one end of a walking system is connected with the walking rail through a rail clamping device, and the other end of the walking system is hinged with the movable box;
the walking system is a hydraulic cylinder.
In the preferred scheme, still be equipped with detachable sideslip frame on the sliding platform, the top of sideslip frame is equipped with jacking positioner, and the direction of movement of sideslip frame is perpendicular with the walking track.
In the preferred scheme, the both sides at the sliding platform are equipped with the fixing base, but screw rod and fixing base rotation axial displacement's connection, and the sideslip frame is equipped with the nut, screw rod and nut threaded connection, the bottom and the top sliding connection of sliding platform of sideslip frame.
In a preferred scheme, the jacking and positioning device is provided with a horizontal pushing device in at least one direction.
The construction method adopting the self-propelled platform suitable for the construction of the small-angle oblique crossing bridge comprises the following steps of:
s1, arranging a walking track on the inner side of an arch seat;
s2, erecting a sliding platform on a walking track, installing a walking system to drive the sliding platform to walk step by step along the walking track, erecting an arch rib assembly bracket on the sliding platform, and arranging a jacking positioning device at the top end of the arch rib assembly bracket;
s3, hoisting arch ribs on the tops of the spliced brackets, and fixedly connecting two ends of the arch ribs with arch seats by adjusting the jacking positioning devices;
s4, sequentially hoisting arch ribs along the longitudinal direction of the bridge, wherein the arch ribs are connected with each other through temporary supports;
s5, permanently connecting the arch ribs, dismantling the spliced bracket, and installing the box girder by using the sliding platform;
the construction of the bridge arch rib and the girder is realized through the steps.
In a preferred embodiment, the running rails are located on both sides of the instant track.
In a preferred embodiment, in step S2,
s21, arranging a plurality of groups of continuous temporary piers on one side of the walking track, wherein connecting lines of the plurality of groups of temporary piers are perpendicular to the walking track;
s22, assembling a three-way pushing device on each group of temporary piers, wherein the three-way pushing device comprises an x direction, a y direction and a z direction;
s23, assembling a sliding platform upper frame at the top of the temporary pier close to the edge, arranging a front guide beam at the front end of the sliding platform upper frame, arranging a rear guide beam at the rear end of the sliding platform upper frame, and enabling the lengths of the front guide beam, the sliding platform upper frame and the rear guide beam to cover at least three groups of temporary piers;
s24, pushing the sliding platform assembly to the upper part of the walking track by using a three-way pushing device;
s25, after the sliding platform assembly is lifted, supporting legs are installed at the bottom of the sliding platform, and after the supporting legs are installed, the supporting legs are lowered onto the walking track;
dismantling the front guide beam and the rear guide beam;
and a traveling system is installed, one end of a hydraulic cylinder of the traveling system is connected with the traveling rail through a rail clamping device, and the other end of the hydraulic cylinder is hinged with a movable box at the bottom of the supporting leg.
In the preferred scheme, in step S23, the single truss of the upper frame of the sliding platform is assembled on the ground, and then is lifted to the temporary piers for temporary fixation after being assembled, and the connecting beams are installed between the single trusses after being lifted in sequence.
In the preferred scheme, in the step S5, after removing the arch rib assembly bracket, a transverse moving frame is arranged on the surface of the sliding platform;
and (5) moving the sliding platform out of the installed arch rib end to serve as an assembly field.
Completing the assembly of single-section steel box girders in an assembly field, sliding the steel box girders to a design position through a sliding platform, adjusting the transverse position of the steel box girders by utilizing a transverse moving frame,
the steel box girder is connected with the corresponding sling, the lifting positioning device is utilized to assist the stretching of the sling until the steel box girder is separated from the sliding platform, and the steel box girder is welded with the previous section of steel box girder.
The invention provides a self-propelled platform and a method suitable for construction of a small-angle oblique crossing bridge. The invention realizes the sectional installation of the arch rib and the girder without erecting a full bracket, thereby greatly improving the construction efficiency. By adopting the scheme of the invention, the accessory can be lifted by adopting the common automobile crane without adopting large-scale lifting equipment, thereby overcoming the interference of the existing line on the construction and realizing convenient line crossing construction.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a partial side view of the present invention.
Fig. 2 is a schematic cross-sectional view of the present invention.
Fig. 3 is a schematic view of the structure of the present invention when installing a box girder.
Fig. 4 is a schematic view of the structure of the present invention when the walking rail is provided.
Fig. 5 is a schematic structural diagram of the present invention when the sliding platform is lifted.
Fig. 6 is a schematic structural view of the present invention when the spliced arch rib is hoisted.
Fig. 7 is a schematic view showing the construction of a temporary pier provided with a sliding platform in the present invention.
FIG. 8 is a schematic view of the top frame of the pushing and sliding platform according to the present invention.
FIG. 9 is a schematic view of the top frame of the pushing and sliding platform of the present invention in place.
FIG. 10 is a schematic view of the structure of the present invention after the legs are mounted at the bottom of the sliding platform.
FIG. 11 is a top view of a skid platform with a traversing frame mounted therein in accordance with the present invention.
In the figure: the device comprises an arch rib 1, a sliding platform 2, a traveling system 3, a traveling track 4, a track foundation 5, a jacking positioning device 6, an arch rib assembling bracket 7, supporting legs 8, a movable box 9, namely a line 10, an arch seat 11, a box girder 12, a traversing frame 13, a sling 14, a temporary support 15, a three-way pushing device 16, a front guide girder 17, a rear guide girder 18, a temporary pier 19, a screw rod 20, a fixed seat 21 and a longitudinal support 22.
Detailed Description
Example 1:
as shown in fig. 1-3, a self-propelled platform suitable for construction of a low-angle oblique crossing bridge comprises a walking track 4 arranged between arch seats 11 at two sides, wherein the walking track 4 is arranged along the longitudinal direction of the bridge, a sliding platform 2 is slidably arranged on the walking track 4 through supporting legs 8, a detachable arch rib assembling bracket 7 is arranged on the sliding platform 2, and a plurality of jacking positioning devices 6 are arranged at the top of the arch rib assembling bracket 7. With the structure, the sliding platform 2 can move to different mounting positions along the walking track 4, is used for supporting the arch rib 1, and is positioned in an auxiliary manner by utilizing the jacking positioning device 6, so that the mounting efficiency is greatly improved.
In the preferred scheme, as shown in fig. 1-3, a movable box 9 is arranged at the bottom of a supporting leg 8, the top of the movable box 9 is hinged with the supporting leg 8, the bottom of the movable box 9 is in sliding connection with a walking track 4, in the embodiment, a sliding plate is arranged at the bottom of the movable box 9, a sliding connection structure is adopted, so that the supporting precision is improved, the gap is reduced, the installation and the positioning of an arch rib 1 are facilitated, one end of a walking system 3 is connected with the walking track 4 through a rail clamping device, and the other end of the walking system 3 is hinged with the movable box 9; the rail clamping device is provided with a movable block for clamping the walking rail 4, and the movable block clamps or loosens the walking rail 4 under the driving of an air cylinder or a hydraulic cylinder.
The walking system 3 is a hydraulic cylinder. The step that traveling system 3 drive sliding platform 2 removed is, and clamping rail device presss from both sides tight walking track 4, and traveling system 3's pneumatic cylinder piston rod stretches out, promotes sliding platform 2 and removes along walking track 4, and clamping rail device loosens traveling track 4, and traveling system 3's pneumatic cylinder piston rod withdraws, and clamping rail device removes along traveling track 4, through above step, drives the accurate walking of sliding platform 2.
In the preferred scheme, as shown in fig. 2, a detachable traversing frame 13 is further arranged on the sliding platform 2, a jacking and positioning device 6 is arranged at the top of the traversing frame 13, and the moving direction of the traversing frame 13 is perpendicular to the walking track 4. With this structure, the rib 1 is supported.
In the preferred scheme, as shown in fig. 3 and 11, fixed seats 21 are arranged on two sides of the sliding platform 2, a screw rod 20 is rotatably and axially immovably connected with the fixed seats 21, a nut is arranged on the traversing frame 13, the screw rod 20 is in threaded connection with the nut, and the bottom of the traversing frame 13 is in sliding connection with the top of the sliding platform 2. With this structure, the sliding platform 2 can be driven to move laterally by rotating the screw 20 to convey the box girder 12 to a predetermined position.
In a preferred embodiment, as shown in fig. 1 to 3, the lifting and positioning device 6 is provided with a horizontal pushing device in at least one direction. With this structure, the mounting positions of the arch rib 1 and the box girder 12 can be finely adjusted.
Example 2:
as shown in fig. 4 to 7, the construction method adopting the self-propelled platform suitable for the construction of the small-angle oblique crossing bridge comprises the following steps:
s1, arranging a walking track 4 on the inner side of an arch abutment 11; the abutment 11 is a group of two, and the inner side of the abutment 11 refers to the position between two corresponding abutment 11 near the abutment 11. As shown in fig. 2. The bottom of the walking track 4 is provided with a bearing platform, and the bottom of the bearing platform is provided with a prestressed high-strength concrete pipe pile.
In a preferred embodiment, the running rails 4 are located on both sides of the instant track 10. The existing line refers to the existing construction route of other roads or bridges, so that the scheme can avoid interference caused by the existing line.
S2, erecting a sliding platform 2 on a walking track 4, installing a walking system 3 to drive the sliding platform 2 to walk step by step along the walking track 4, erecting an arch rib assembly bracket 7 on the sliding platform 2, and arranging a jacking positioning device 6 at the top end of the arch rib assembly bracket 7;
preferably, in this step,
s21, arranging a plurality of groups of continuous temporary piers 19 on one side of the walking track 4, wherein each group of temporary piers 19 is two, 3-5 groups of temporary piers 19 are usually needed according to the site construction space, and connecting lines of the plurality of groups of temporary piers 19 are perpendicular to the walking track 4;
s22, assembling three-way thrusters 16 on each group of temporary piers 19, wherein the three-way thrusters 16 comprise an x direction, a y direction and a z direction;
s23, assembling a sliding platform upper frame at the top of the temporary piers 19 close to the edge, arranging a front guide beam 17 at the front end of the sliding platform upper frame, arranging a rear guide beam 18 at the rear end of the sliding platform upper frame, and at least covering three groups of temporary piers 19 by the lengths of the front guide beam 17, the sliding platform upper frame and the rear guide beam 18;
preferably, in this step, the single trusses of the upper frame of the sliding platform are assembled on the ground, and then are lifted to the temporary piers 19 for temporary fixation, and the connecting beams are installed between the single trusses after being lifted in sequence.
The structure of the sliding platform assembly is shown in fig. 11 in a top view. The front guide beam 17 and the rear guide beam 18 are independent beam bodies, and no connecting beam is required to reduce the weight of the cantilever.
S24, pushing the sliding platform assembly to the upper part of the walking track 4 by using the three-way pushing device 16; the pushing construction is to use a three-way pushing device 16 and a buttress, and alternate pushing sliding platform assemblies advance in a stepping mode along the temporary pier 19.
S25, installing the supporting legs 8 at the bottom of the sliding platform after the sliding platform assembly is lifted, feeding the supporting legs 8 between the sliding platform and the walking track 4 by using a lifting device during installation, completing the fixed connection between the supporting legs 8 and the bottom of the sliding platform, and lowering the supporting legs 8 onto the walking track 4 after the supporting legs 8 are installed, thus completing load conversion; the temporary piers 19 can be removed at this time.
Removing the front guide beam 17 and the rear guide beam 18;
and a traveling system 3 is installed, one end of a hydraulic cylinder of the traveling system 3 is connected with the traveling rail 4 through a rail clamping device, and the other end of the hydraulic cylinder is hinged with a movable box 9 at the bottom of the supporting leg 8. The sliding platform 2 is driven to walk through the extension and contraction of the walking system 3.
S3, lifting the arch rib 1 on the top of the assembly bracket 7, and adjusting the lifting and positioning device 6, wherein the lifting and positioning device 6 comprises a group of lifting hydraulic cylinders and at least one group of horizontal pushing hydraulic cylinders, and the longitudinal horizontal adjustment can be adjusted by the traveling system 3, so that the two ends of the arch rib 1 are fixedly connected with the arch base 11;
in the preferred scheme, as shown in fig. 6, in the process of hoisting the arch rib 1, the arch rib 1 is hoisted and assembled from the middle to one side by using an automobile crane and then returns to the middle to the other side.
S4, sequentially hoisting arch ribs 1 along the longitudinal direction of the bridge, wherein the arch ribs 1 are connected with each other through temporary supports 15;
s5, after the whole arch rib is hoisted completely, the arch ribs 1 are permanently connected through the longitudinal supports 22, and the longitudinal supports 22 are installed in sequence from low to high during installation.
Dismantling the spliced bracket 7, and installing a box girder 12 by utilizing the sliding platform 2;
in the preferred scheme, as shown in figures 3 and 7, in the step, after the arch rib assembly bracket 7 is removed, a transverse moving frame 13 is arranged on the surface of the sliding platform 2, and a jacking and positioning device 6 is arranged at the top of the preferred transverse moving frame 13;
the sliding platform 2 is moved out of the end of the installed arch rib 1 to be used as an assembling field.
The single-section steel box girder is assembled in an assembling field, the steel box girder is slipped to a design position through a slipping platform 2, the transverse position of the steel box girder is regulated by utilizing a transverse shifting frame 13,
the steel box girder is connected with the corresponding sling 14, the lifting positioning device 6 is utilized to assist the tensioning sling 14 to separate from the sliding platform 2, namely, the steel box girder is lifted firstly, the lifting sling 14 is tensioned, and then the lifting positioning device 6 is retracted, so that the construction of the tensioning sling 14 is completed. The rear steel box girder is welded with the front section of steel box girder.
The construction of the bridge arch rib and the girder is realized through the steps.
The foregoing embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without collision. The protection scope of the present invention is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.
Claims (10)
1. A self-propelled platform suitable for construction of low-angle oblique crossing bridge, characterized by: including setting up walking track (4) between both sides hunch base (11), walking track (4) are along the longitudinal direction of bridge, and sliding platform (2) are equipped with detachable hunch rib assembly support (7) on sliding platform (2) through landing leg (8) slidable mounting on walking track (4), are equipped with a plurality of jacking positioner (6) at the top of hunch rib assembly support (7).
2. The self-propelled platform suitable for low-angle oblique crossing bridge construction according to claim 1, wherein the platform is characterized in that: a movable box (9) is arranged at the bottom of the supporting leg (8), the top of the movable box (9) is hinged with the supporting leg (8), the bottom of the movable box (9) is in sliding connection with the walking track (4), one end of the walking system (3) is connected with the walking track (4) through a rail clamping device, and the other end of the walking system (3) is hinged with the movable box (9);
the walking system (3) is a hydraulic cylinder.
3. The self-propelled platform suitable for low-angle oblique crossing bridge construction according to claim 1, wherein the platform is characterized in that: the sliding platform (2) is also provided with a detachable transverse moving frame (13), the top of the transverse moving frame (13) is provided with a jacking and positioning device (6), and the moving direction of the transverse moving frame (13) is vertical to the walking track (4).
4. A self-propelled platform suitable for use in low angle skew bridge construction as claimed in claim 3, wherein: the two sides of the sliding platform (2) are provided with fixed seats (21), a screw rod (20) is connected with the fixed seats (21) in a rotatable and non-axial movable way, the transverse moving frame (13) is provided with a nut, the screw rod (20) is in threaded connection with the nut, and the bottom of the transverse moving frame (13) is in sliding connection with the top of the sliding platform (2).
5. The self-propelled platform suitable for small-angle oblique crossing bridge construction according to any one of claims 1-4, wherein the platform is characterized in that: the jacking and positioning device (6) is provided with a horizontal pushing device in at least one direction.
6. A construction method of a self-propelled platform suitable for construction of a small-angle oblique crossing bridge according to any one of claims 1 to 5, comprising the following steps:
s1, arranging a walking track (4) on the inner side of an arch abutment (11);
s2, erecting a sliding platform (2) on a walking track (4), installing a walking system (3) to drive the sliding platform (2) to walk step by step along the walking track (4), erecting an arch rib assembly bracket (7) on the sliding platform (2), and arranging a jacking and positioning device (6) at the top end of the arch rib assembly bracket (7);
s3, hoisting the arch rib (1) on the top of the assembly bracket (7), and fixedly connecting the two ends of the arch rib (1) with the arch base (11) by adjusting the jacking positioning device (6);
s4, sequentially hoisting arch ribs (1) along the longitudinal direction of the bridge, wherein the arch ribs (1) are connected with each other through temporary supports (15);
s5, permanently connecting the arch ribs (1), dismantling the spliced bracket (7), and installing the box girder (12) by utilizing the sliding platform (2);
the construction of the bridge arch rib and the girder is realized through the steps.
7. The construction method adopting the self-propelled platform suitable for the construction of the low-angle oblique crossing bridge, which is disclosed in claim 6, is characterized in that: the walking tracks (4) are positioned on two sides of the existing line (10).
8. The construction method adopting the self-propelled platform suitable for the construction of the low-angle oblique crossing bridge, which is disclosed in claim 6, is characterized in that: in the step S2 of the process,
s21, arranging a plurality of groups of continuous temporary piers (19) on one side of the walking track (4), wherein connecting lines of the plurality of groups of temporary piers (19) are perpendicular to the walking track (4);
s22, assembling a three-way pushing device (16) on each group of temporary piers (19), wherein the three-way pushing device (16) comprises an x direction, a y direction and a z direction;
s23, assembling a sliding platform upper frame at the top of the temporary piers (19) close to the edge, arranging a front guide beam (17) at the front end of the sliding platform upper frame, arranging a rear guide beam (18) at the rear end of the sliding platform upper frame, and at least covering three groups of temporary piers (19) by the lengths of the front guide beam (17), the sliding platform upper frame and the rear guide beam (18);
s24, pushing the sliding platform assembly to the upper part of the walking track (4) by using a three-way pushing device (16);
s25, after the sliding platform assembly is lifted, supporting legs (8) are installed at the bottom of the sliding platform (2), and after the supporting legs (8) are installed, the supporting legs (8) are lowered onto the walking track (4);
removing the front guide beam (17) and the rear guide beam (18);
and a traveling system (3) is installed, one end of a hydraulic cylinder of the traveling system (3) is connected with the traveling rail (4) through a rail clamping device, and the other end of the hydraulic cylinder is hinged with a movable box (9) at the bottom of the supporting leg (8).
9. The construction method adopting the self-propelled platform suitable for the construction of the low-angle oblique crossing bridge, which is disclosed in claim 8, is characterized in that: in step S23, the single truss of the upper frame of the sliding platform is assembled on the ground, and then is lifted to a temporary pier (19) for temporary fixation after being assembled, and a connecting beam is installed between the single trusses after being lifted in sequence.
10. The construction method adopting the self-propelled platform suitable for the construction of the low-angle oblique crossing bridge, which is disclosed in claim 6, is characterized in that: in the step S5, after the arch rib assembly bracket (7) is removed, a transverse moving frame (13) is arranged on the surface of the sliding platform (2);
the sliding platform (2) is moved out of the end of the installed arch rib (1) to be used as an assembly field;
finishing the assembly of single-section steel box girders in an assembly field, sliding the steel box girders to a design position through a sliding platform (2), adjusting the transverse position of the steel box girders by utilizing a transverse moving frame (13),
the steel box girder is connected with a corresponding sling (14), the lifting and positioning device (6) is utilized to assist the stretching of the sling (14) until the steel box girder is separated from the sliding platform (2), and the rear steel box girder is welded with the previous section of steel box girder.
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| CN202111436653.0A CN114016424B (en) | 2021-11-29 | 2021-11-29 | Self-propelled platform and method suitable for small-angle oblique crossing bridge construction |
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| CN202111436653.0A CN114016424B (en) | 2021-11-29 | 2021-11-29 | Self-propelled platform and method suitable for small-angle oblique crossing bridge construction |
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| CN114016424B true CN114016424B (en) | 2024-02-20 |
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