CN113897874A - Welding-free mounting method for bridge deck of steel trestle - Google Patents
Welding-free mounting method for bridge deck of steel trestle Download PDFInfo
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- CN113897874A CN113897874A CN202111268606.XA CN202111268606A CN113897874A CN 113897874 A CN113897874 A CN 113897874A CN 202111268606 A CN202111268606 A CN 202111268606A CN 113897874 A CN113897874 A CN 113897874A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000013589 supplement Substances 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 14
- 210000005069 ears Anatomy 0.000 claims description 13
- 238000003466 welding Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 7
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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Abstract
The invention discloses a welding-free mounting method for a bridge deck of a steel trestle, wherein a cross beam is mounted on a Bailey beam through an anchor ear I, and a longitudinal beam is mounted through an anchor ear II; after the end clamp and the middle clamp are adjusted, placing the end clamps and the middle clamp on the corresponding cross beam; the hoisting bridge deck is paved on the longitudinal beam, and the supplement plate is aligned to the rectangular gap and the screw II is aligned to the central hole by moving; the plurality of plates are arranged on the supplementary plate through screws and are fastened, and the screw I and the screw II are screwed one by one, so that the grabbing plate I and the grabbing plate II respectively grab the beam, and the installation is finished. The invention has simpler installation process, forms a grid structure which can be assembled and disassembled quickly, leads the stress of the bridge deck to be more uniform, improves the bearing capacity compared with the traditional steel trestle and is worth popularizing; the mounting structure of the invention is ordered and simple, the adopted accessories have low manufacturing cost, safety and reliability, high welding cost and welding time required by a common trestle are not needed, the construction period is shortened, and the dismounting is convenient and is nondestructive.
Description
Technical Field
The invention relates to the technical field of bridge engineering across wide river channels, in particular to a welding-free mounting method for a bridge deck of a steel trestle.
Background
The bridge engineering across wider river channels generally adopts a trestle construction method. The trestle is a temporary bridge which runs on hoisting and transporting machinery and directly serves for construction. The construction trestle generally comprises three parts of a pier, a beam span structure and a bridge deck system.
The bridge deck of the existing steel trestle is generally provided with a Bailey beam erected by placing a bridge deck on the water surface, in order to ensure that the connection is stable, the bridge deck is fixedly connected with the Bailey beam or an accessory bound and configured with the Bailey beam in a full-seam welding mode, the welding engineering quantity of the whole steel trestle is large, and the construction time of the bridge is further influenced; the welding engineering is not reversible, so that misassembly or reconstruction is more difficult; and the welding department often is the weak department of atress of decking, and long period load or wet gas corrosion probably cause potential safety hazards such as decking dislocation, await urgent need to improve.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a welding-free mounting method for a steel trestle bridge deck.
In order to achieve the purpose, the invention adopts the following technical scheme:
a welding-free mounting method for a bridge deck of a steel trestle is characterized in that cross beams are arranged on Bailey beams of piers, longitudinal beams are arranged on two sides of the upper surface of each cross beam, the cross beams and the longitudinal beams are H-shaped steel bars which are placed right side by side, each longitudinal beam is composed of a plurality of collinear H-shaped steels, a bridge deck is laid on the longitudinal beams, seams between adjacent bridge deck plates and seams between the adjacent H-shaped steels of the longitudinal beams are staggered mutually, the length of each cross beam is greater than the transverse width of the bridge deck, and the transverse width of each bridge deck plate is greater than the transverse distance between the two longitudinal beams;
the adjacent edges of the two bridge decks are provided with rectangular notches, the middle part of any one of the two bridge decks is provided with a central hole, an end clamp is arranged at the rectangular notch, a middle clamp is arranged at the central hole, any one of the two bridge decks is connected to the corresponding cross beam through the middle clamp, and the two adjacent bridge decks are connected to the corresponding cross beam through the end clamps;
the end clamp comprises a supplement plate, a cross lifting block I connected with the supplement plate through a screw I, a grabbing plate I connected with the cross lifting block I through a pin shaft I, a spring piece I used for giving elastic rotation to the grabbing plate I and a U-shaped rod arranged between the supplement plate and the grabbing plate I, wherein the supplement plate is arranged in a rectangular space formed by two rectangular gaps and used for filling the gaps of the bridge deck;
the center of the upper surface of the supplement plate is provided with a counter bore, a screw cap of a screw I is positioned in the counter bore, the center of a cross lifting block I is provided with a screw hole for the screw I to pass through, two ends of a U-shaped rod are fixedly connected to the bottom surface of the supplement plate, the bottom of the U-shaped rod is obliquely lapped on the upper surface of a grabbing plate I and is used for propping against the grabbing plate I to limit the rotation of the grabbing plate I, one side of a spring piece I is obliquely inserted to the middle position of the lower surface of the grabbing plate I from the middle part of the bottom surface of the cross lifting block I after bypassing the upper part of a pin shaft I, the side of the grabbing plate I, which is far away from the pin shaft I, is in an arc plate shape and is used for hooking the top plate position of the beam I-steel, when the cross lifting block I is driven by the rotation of the screw I to ascend, the included angle of the two grabbing plates I can be clamped with the beam I-steel, and when the lifting block I ascends, the included angle of the two grabbing plates I can be separated from the beam I;
the bottom surface of the supplementary plate is fixedly connected with four fixing columns which are distributed in a rectangular shape, the bottom end faces of the fixing columns are provided with screw holes, the four fixing columns are fixedly connected with a n-shaped plate through screws, the top surface of the n-shaped plate and the bottom surface of the bridge deck plate clamp the top plate of the longitudinal beam I-shaped steel, the mounting stability is further improved, and the center of the n-shaped plate is provided with a through hole for the cross-shaped lifting block I and the U-shaped rod to pass through;
the middle clamp comprises a door-shaped plate, a cross lifting block II connected with the door-shaped plate through a screw II, a grabbing plate II connected with the cross lifting block II through a pin II and a spring piece II used for endowing the grabbing plate II with elastic rotation, a screw hole is formed in the center of the upper surface of the door-shaped plate, a screw cap of the screw II is positioned in the central hole, a screw hole for the screw II to pass through is formed in the center of the cross lifting block II, the upper surface of the door-shaped plate abuts against the bottom surface of the top plate of the longitudinal beam I-shaped steel, the top plate of the longitudinal beam I-shaped steel is clamped by the upper surface of the door-shaped plate and the bottom surface of the bridge deck, the installation stability is further improved, the bottom of the door-shaped plate abuts against the upper surface of the grabbing plate II and is used for abutting against the grabbing plate II to limit the rotation of the grabbing plate II, the spring piece II bypasses the upper part of the pin II and is obliquely inserted into the middle position of the lower surface of the grabbing plate II through the middle part of the bottom surface of the pin II, one side of the grabbing plate II, one side, which is far away from the pin II, the arc-shaped plate is in an arc-shaped plate shape, the clamping device is used for hooking the position of a top plate of the cross beam I-steel, when the cross lifting block II is driven by the rotation of the screw II to ascend, the included angle of the two grabbing plates II is reduced, the cross beam I-steel can be clamped, and when the cross lifting block II ascends, the included angle of the two grabbing plates II is increased, and the cross beam I-steel can be separated;
the edge position of any end of the upper surface of the cross beam is bound on a truss steel bar of the Bailey beam through two groups of hoops I, the two groups of hoops I are door-shaped, the tops of the hoops I are buckled on the upper surface of the cross beam, the two groups of hoops I are respectively positioned at the left side and the right side of the truss steel bar of the Bailey beam, one ends of the two groups of hoops I are fastened on one connecting bar I through nuts, and the other ends of the two groups of hoops I are inserted into the other connecting bar I, so that the function of fixing the cross beam is achieved;
the upper surface of the longitudinal beam is bound on the bottom surface of a cross beam through anchor ears II, the two groups of anchor ears II are door-shaped, the tops of the two groups of anchor ears II are buckled on the upper surface of the longitudinal beam, the two groups of anchor ears II are respectively positioned at the front side and the rear side of the cross beam, one ends of the two groups of anchor ears II are fastened on one connecting strip II through nuts, and the other ends of the two groups of anchor ears II are inserted into the other connecting strip II, so that the longitudinal beam is fixed;
during installation, a plurality of cross beams are installed at the top of the Bailey beam through the hoop I, the cross beams are corrected to be perpendicular to longitudinal truss steel bars at the top end of the Bailey beam, and then longitudinal beams are installed one by one through the hoop II; sleeving a plurality of plates on the lower parts of end clamps, placing the end clamps on sequentially corresponding cross beams, placing intermediate clamps on the corresponding cross beams to enable the screw caps of the screw I and the screw II to be highest, approving the space between each end clamp and the position of a rectangular gap of the bridge deck, approving the space between each intermediate clamp and the position of a central hole of the bridge deck, knocking the position of the micro-adjustment cross beam, and fastening the anchor ears I and II; paving each bridge deck on the longitudinal beam by hoisting, and moving to enable the supplement plate to be aligned with the rectangular gap and the screw II to be aligned with the central hole; the plurality of plates are arranged on the supplementary plate through screws and are fastened, and the screw I and the screw II are screwed one by one, so that the grabbing plate I and the grabbing plate II respectively grab the beam, and the installation is finished.
Preferably, the length of each I-steel of the longitudinal beam is the same as the longitudinal length of the bridge deck, so that the seams are staggered, the two I-steels of the longitudinal beam can be clamped by each bridge deck and the cross beam, and the fastening performance is improved.
Preferably, guardrail columns are installed at two ends of the cross beam through the clamp, the two ends of the cross beam extend out of the space where the bridge deck is located, the extending parts can be used for installing the guardrail columns, and the guardrail parts of the guardrails can be installed between the two guardrail columns, so that the guardrail structure can be installed rapidly.
Compared with the prior art, the invention has the beneficial effects that:
1. the installation process is simple, the cross beam and the longitudinal beam can be installed on the Bailey beam only through the hoop I, the hoop II, the end clamp and the middle clamp, and a grid structure capable of being assembled and disassembled quickly is formed, so that the stress of a bridge deck is uniform, the bearing capacity is improved compared with that of a traditional steel trestle, and the steel trestle is worthy of popularization;
2. the mounting structure of the invention is ordered and simple, the adopted accessories have low manufacturing cost, safety and reliability, high welding cost and welding time required by a common trestle are not needed, the construction period is shortened, and the dismounting is convenient and is nondestructive.
Drawings
FIG. 1 is an overall installation structure diagram of a welding-free installation method for a steel trestle bridge deck according to the invention;
FIG. 2 is an overall view of the cross member assembly of the present invention;
FIG. 3 is a view showing the structure of the hoop for installing the cross beam in the present invention;
FIG. 4 is an overall view of the stringer mounting of the present invention;
FIG. 5 is a view of the construction of the anchor ear for installing the longitudinal beam in the present invention;
FIG. 6 is a detailed view of the end clamp of the present invention;
FIG. 7 is a view showing an assembly model of the end clamp according to the present invention;
FIG. 8 is a detailed view of the intermediate clamp of the present invention;
FIG. 9 is an assembly model view of the intermediate clamp of the present invention;
in the figure: the steel beam comprises a Bailey beam 1, a cross beam 2, a longitudinal beam 3, a bridge deck 4, a rectangular notch 5, a central hole 6, an end clamp 7, a supplement plate 701, a screw I702, a cross lifting block I703, a pin shaft I704, a grabbing plate I705, a spring leaf I706, a U-shaped rod 707, an intermediate clamp 8, a door-shaped plate 801, a screw II802, a cross lifting block II803, a pin shaft II804, a grabbing plate II805, a spring leaf II806, a fixing column 9, a plurality of plates 10, a hoop I11, a connecting strip I12, a hoop II13 and a connecting strip II 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a welding-free mounting method for a bridge deck of a steel trestle comprises the steps that a crossbeam 2 is arranged on a Bailey beam 1 of a pier, longitudinal beams 3 are arranged on two sides of the upper surface of the crossbeam 2, the crossbeam 2 and the longitudinal beams 3 are both H-shaped steel bars which are placed right at the same time, each longitudinal beam 3 is composed of a plurality of collinear H-shaped steels, bridge decks 4 are laid on the longitudinal beams 3, seams between the adjacent bridge decks 4 and seams between the adjacent H-shaped steels of the longitudinal beams 3 are staggered with each other, the length of the crossbeam 2 is greater than the transverse width of each bridge deck 4, and the transverse width of each bridge deck 4 is greater than the transverse distance between the two longitudinal beams 3; rectangular notch 5 has been seted up on two adjacent sides of decking 4, and central hole 6 has been seted up at the middle part of arbitrary decking 4, and rectangular notch 5 department is provided with end anchor clamps 7, and central hole 6 department is provided with middle anchor clamps 8, and arbitrary decking 4 is connected on corresponding crossbeam 2 through middle anchor clamps 8, and two adjacent decking 4 pass through end anchor clamps 7 and connect on corresponding crossbeam 2.
Referring to fig. 6-7, the end fixture 7 includes a supplementary plate 701, a cross lifting block I703 connected to the supplementary plate 701 through a screw I702, a grasping plate I705 connected to the cross lifting block I703 through a pin I704, a spring piece I706 for giving the grasping plate I705 elastic rotation, and a U-shaped rod 707 disposed between the supplementary plate 701 and the grasping plate I705, wherein the supplementary plate 701 is disposed in a rectangular space formed by two rectangular notches 5 for filling the notches of the bridge deck 4; the center of the upper surface of the supplement plate 701 is provided with a counter bore, a screw cap of a screw I702 is positioned in the counter bore, the center of a cross lifting block I703 is provided with a screw hole for the screw I702 to pass through, two ends of a U-shaped rod 707 are fixedly connected to the bottom surface of the supplement plate 701, the bottom of the U-shaped rod 707 is obliquely lapped on the upper surface of a grabbing plate I705 and is used for propping against the grabbing plate I705 to limit the rotation of the grabbing plate I705, one side of a spring piece I706 bypasses the upper part of a pin shaft I704 from the middle part of the bottom surface of the cross lifting block I703 and is obliquely inserted to the middle part of the lower surface of the grabbing plate I705, one side of the grabbing plate I705 away from the pin shaft I704 is in an arc plate shape and is used for hooking the top plate position of the cross beam 2I-shaped steel, when the screw I702 rotates to drive the cross lifting block I703 to ascend, the angle between the two grabbing plates I705 becomes smaller and can clamp the cross beam 2I-shaped steel, and the included angle of the two grabbing plates I705 becomes larger when the cross lifting block I703 ascends; the bottom surface of the supplementary plate 701 is further fixedly connected with four fixing columns 9 which are distributed in a rectangular shape, screw holes are formed in the bottom end faces of the fixing columns 9, the four fixing columns 9 are fixedly connected with a plurality of shaped plates 10 through screws, the top faces of the plurality of shaped plates 10 and the bottom surface of the bridge deck 4 clamp the top plate of the longitudinal beam 3I-shaped steel, the mounting stability is further improved, and a through hole for the cross lifting block I703 and the U-shaped rod 707 to pass through is formed in the center of each of the plurality of shaped plates 10.
Referring to fig. 8-9, the middle clamp 8 includes a door-shaped plate 801, a cross lifting block II803 connected with the door-shaped plate 801 through a screw II802, a grabbing plate II805 connected with the cross lifting block II803 through a pin II804, and a spring plate II806 for giving elastic rotation to the grabbing plate II805, the center of the upper surface of the door-shaped plate 801 is provided with a screw hole, the nut of the screw II802 is located in the central hole 6, the center of the cross lifting block II803 is provided with a screw hole for the screw II802 to pass through, the upper surface of the door-shaped plate 801 abuts against the bottom surface of the top plate of the i-steel of the stringer 3, the top plate of the i-steel stringer 3 is clamped by the upper surface of the door-shaped plate 801 and the bottom surface of the bridge deck 4, the installation stability is further improved, the bottom of the door-shaped plate 801 abuts against the upper surface of the grabbing plate II805 for abutting against the grabbing plate II805 to limit the rotation thereof, the spring plate II806 is obliquely inserted to the middle position of the lower surface of the grabbing plate II805 from the middle of the bottom surface of the cross lifting block 803 II805 and around the upper portion of the pin II804, one side of the grabbing plate II805, which is far away from the pin shaft II804, is in an arc plate shape and is used for hooking the position of the top plate of the beam 2I-steel, when the screw II802 rotates to drive the cross lifting block II803 to ascend, the included angle of the two grabbing plates II805 is reduced, the beam 2I-steel can be clamped, and when the cross lifting block II803 ascends, the included angle of the two grabbing plates II805 is enlarged, and the two grabbing plates II805 can be separated from the beam 2I-steel;
referring to fig. 2-3, the edge position of any end of the upper surface of the beam 2 is bound on a truss steel bar of the bailey beam 1 through two sets of hoops I11, both sets of hoops I11 are door-shaped and the top is buckled on the upper surface of the beam 2, two sets of hoops I11 are respectively located at the left and right side positions of the truss steel bar of the bailey beam 1, one end of each set of hoops I11 is fastened on one connecting bar I12 through a nut, and the other end of each set of hoops I11 is inserted into the other connecting bar I12, so that the beam 2 is fixed.
Referring to fig. 4-5, the upper surface of the longitudinal beam 3 is bound on the bottom surface of one cross beam 2 through the hoop II13, two sets of hoops II13 are door-shaped and the top is buckled on the upper surface of the longitudinal beam 3, two sets of hoops II13 are respectively located at the front and rear sides of the cross beam 2, one end of each set of hoop II13 is fastened on one connecting strip II14 through a nut, and the other end of each set of hoop II13 is inserted into another connecting strip II14, so that the effect of fixing the longitudinal beam 3 is achieved.
Referring to fig. 1-9, during installation, a plurality of cross beams 2 are installed at the top of the bailey beam 1 through an anchor ear I11, the cross beams 2 are corrected to be perpendicular to longitudinal truss steel bars at the top end of the bailey beam 1, and then the longitudinal beams 3 are installed one by one through an anchor ear II 13; sleeving a plurality of plates 10 on the lower parts of end clamps 7, placing the end clamps 7 on the sequentially corresponding cross beams 2, placing middle clamps 8 on the corresponding cross beams 2, enabling screw caps of a screw I702 and a screw II802 to be highest, approving the distance between each end clamp 7 and the position of a rectangular notch 5 of a bridge deck 4, approving the distance between each middle clamp 8 and the position of a circular center hole 6 of the bridge deck 4, knocking the position of the micro-adjustment cross beam 2, and fastening a hoop I11 and a hoop II 13; paving each bridge deck 4 on the longitudinal beam 3 by hoisting, and moving to enable the supplement plate 701 to be aligned with the rectangular gap 5 and the screw II802 to be aligned with the central hole 6; several plates 10 are installed on the supplementary plate 701 through screws and fastened, and the screw I702 and the screw II802 are screwed one by one, so that the grabbing plate I705 and the grabbing plate II805 respectively grab the beam, and the installation is completed.
Referring to fig. 1, the length of each i-steel of the longitudinal beam 3 is the same as the longitudinal length of the bridge deck 4, so that the joints are convenient to stagger, and the two i-steels of the longitudinal beam 3 can be clamped tightly by each bridge deck 4 and the cross beam 2, thereby improving the fastening performance.
Referring to fig. 1, guardrail columns are installed at two ends of a cross beam 2 through clamps, two ends of the cross beam 2 extend out of the space where a bridge deck plate 4 is located, the extending parts can be used for installing the guardrail columns, and a guardrail part of a guardrail can be installed between the two guardrail columns, so that a guardrail structure can be installed rapidly.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. A welding-free mounting method for a bridge deck of a steel trestle is characterized in that a cross beam (2) is arranged on a Bailey beam (1) of a bridge pier, longitudinal beams (3) are arranged on two sides of the upper surface of the cross beam (2), the cross beam (2) and the longitudinal beams (3) are H-shaped steel bars which are placed right at the same time, each longitudinal beam (3) is composed of a plurality of collinear H-shaped steels, bridge decks (4) are laid on the longitudinal beams (3), seams between the adjacent bridge decks (4) are staggered with seams between the adjacent H-shaped steels of the longitudinal beams (3), the length of the cross beam (2) is greater than the transverse width of each bridge deck (4), and the transverse width of each bridge deck (4) is greater than the transverse distance between the two longitudinal beams (3);
rectangular notches (5) are formed in adjacent edges of the two bridge deck plates (4), a central hole (6) is formed in the middle of any one of the bridge deck plates (4), an end clamp (7) is arranged at the rectangular notch (5), a middle clamp (8) is arranged at the central hole (6), any one of the bridge deck plates (4) is connected to the corresponding cross beam (2) through the middle clamp (8), and the two adjacent bridge deck plates (4) are connected to the corresponding cross beams (2) through the end clamps (7);
the end clamp (7) comprises a supplement plate (701), a cross lifting block I (703) connected with the supplement plate (701) through a screw I (702), a grabbing plate I (705) connected with the cross lifting block I (703) through a pin shaft I (704), a spring piece I (706) used for enabling the grabbing plate I (705) to elastically rotate, and a U-shaped rod (707) arranged between the supplement plate (701) and the grabbing plate I (705), wherein the supplement plate (701) is arranged in a rectangular space formed by two rectangular gaps (5) and used for filling gaps of a bridge deck (4);
the center of the upper surface of the supplement plate (701) is provided with a counter bore, a screw cap of a screw I (702) is positioned in the counter bore, the center of a cross lifting block I (703) is provided with a screw hole for the screw I (702) to pass through, two ends of a U-shaped rod (707) are fixedly connected to the bottom surface of the supplement plate (701), the bottom of the U-shaped rod (707) is obliquely lapped on the upper surface of a grabbing plate I (705) and is used for propping against the grabbing plate I (705) to limit the rotation of the grabbing plate I (705), one side of a spring piece I (706) is obliquely inserted into the middle position of the lower surface of the grabbing plate I (705) from the middle part of the bottom surface of the cross lifting block I (703) and bypasses the upper part of a pin shaft I (704), one side of the grabbing plate I (705), which is far away from the pin shaft I (704), is in an arc plate shape and is used for hooking the top plate position of I-shaped steel of the beam (2), when the cross lifting block I (703) is driven by the rotation of the screw I (702), the cross lifting block I (703), the included angle of the two grabbing plates I (705) is reduced and can clamp the I (2), when the cross lifting block I (703) rises, the included angle between the two grabbing plates I (705) becomes larger, and the two grabbing plates can be separated from the I-steel of the cross beam (2);
the bottom surface of the supplementary plate (701) is further fixedly connected with four fixing columns (9) which are distributed in a rectangular shape, screw holes are formed in the bottom end surfaces of the fixing columns (9), the four fixing columns (9) are fixedly connected with a n-shaped plate (10) through screws, the top surface of the n-shaped plate (10) and the bottom surface of the bridge deck (4) clamp the top plate of the I-shaped steel of the longitudinal beam (3), the mounting stability is further improved, and a through hole for a cross-shaped lifting block I (703) and a U-shaped rod (707) to pass through is formed in the center of the n-shaped plate (10);
the middle clamp (8) comprises a door-shaped plate (801), a cross lifting block II (803) connected with the door-shaped plate (801) through a screw II (802), a grabbing plate II (805) connected with the cross lifting block II (803) through a pin shaft II (804) and a spring piece II (806) used for endowing the grabbing plate II (805) with elastic rotation, a screw hole is formed in the center of the upper surface of the door-shaped plate (801), a nut of the screw II (802) is located in a central hole (6), a screw hole for the screw II (802) to pass through is formed in the center of the cross lifting block II (803), the upper surface of the door-shaped plate (801) abuts against the bottom surface of the top plate of the I-shaped steel of the longitudinal beam (3), the top plate of the I-shaped steel of the longitudinal beam (3) is clamped through the upper surface of the door-shaped plate (801) and the bottom surface of the bridge deck (4), the installation stability is further improved, and the bottom of the door-shaped plate (801) abuts against the upper surface of the grabbing plate II (805), the clamping device is used for propping against a grabbing plate II (805) to limit the rotation of the grabbing plate II, one side of a spring piece II (806) is obliquely inserted into the middle position of the lower surface of the grabbing plate II (805) from the middle part of the bottom surface of a cross lifting block II (803) and bypasses the upper part of a pin shaft II (804), one side of the grabbing plate II (805) far away from the pin shaft II (804) is in an arc plate shape and is used for hooking the position of a top plate of I-shaped steel of the beam (2), when a screw II (802) rotates to drive the cross lifting block II (803) to ascend, the included angle of the two grabbing plates II (805) is reduced to clamp the I-shaped steel of the beam (2), and when the cross lifting block II (803) ascends, the included angle of the two grabbing plates II (805) is increased to be separated from the I-shaped steel of the beam (2);
the edge position of any end of the upper surface of the beam (2) is bound on a truss steel bar of the Bailey beam (1) through two groups of hoops I (11), the two groups of hoops I (11) are door-shaped, the tops of the hoops I (11) are buckled on the upper surface of the beam (2), the two groups of hoops I (11) are respectively positioned at the left side and the right side of the truss steel bar of the Bailey beam (1), one ends of the two groups of hoops I (11) are fastened on a connecting bar I (12) through nuts, and the other ends of the two groups of hoops I (11) are inserted into the other connecting bar I (12), so that the beam (2) is fixed;
the upper surface of the longitudinal beam (3) is bound on the bottom surface of one cross beam (2) through anchor ears II (13), two groups of anchor ears II (13) are door-shaped, the tops of the anchor ears II (13) are buckled on the upper surface of the longitudinal beam (3), the two groups of anchor ears II (13) are respectively positioned at the front side and the rear side of the cross beam (2), one ends of the two groups of anchor ears II (13) are fastened on one connecting strip II (14) through nuts, and the other ends of the two groups of anchor ears II (13) are inserted into the other connecting strip II (14), so that the longitudinal beam (3) is fixed;
during installation, a plurality of cross beams (2) are installed at the top of the Bailey beam (1) through the hoop I (11), the cross beams (2) are corrected to be perpendicular to longitudinal truss steel bars at the top end of the Bailey beam (1), and then the longitudinal beams (3) are installed one by one through the hoop II (13); sleeving a plurality of plates (10) on the lower parts of end clamps (7), placing the end clamps (7) on sequentially corresponding cross beams (2), placing middle clamps (8) on the corresponding cross beams (2), enabling screw caps of a screw I (702) and a screw II (802) to be highest, approving the distance between each end clamp (7) and the position of a rectangular notch (5) of a bridge deck (4), approving the distance between each middle clamp (8) and the position of a circular center hole (6) of the bridge deck (4), knocking the position of the micro-adjustment cross beam (2), and fastening a hoop I (11) and a hoop II (13); paving the bridge deck plates (4) on the longitudinal beams (3) by hoisting, and moving to enable the supplement plates (701) to be aligned with the rectangular notches (5) and the screw rods II (802) to be aligned with the central holes (6); the several plates (10) are installed on the supplementary plate (701) through screws and fastened, and the screw I (702) and the screw II (802) are screwed one by one, so that the grabbing plate I (705) and the grabbing plate II (805) respectively grab the cross beam, and the installation is finished.
2. A method for weld-free installation of a steel trestle bridge deck according to claim 1, characterised in that the length of each i-steel of the stringers (3) is the same as the longitudinal length of the deck slab (4).
3. The welding-free installation method of the steel trestle bridge floor according to claim 1, characterized in that guardrail columns are installed at two ends of the crossbeam (2) through clamps.
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| CN202111268606.XA CN113897874A (en) | 2021-10-29 | 2021-10-29 | Welding-free mounting method for bridge deck of steel trestle |
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| CN202111268606.XA CN113897874A (en) | 2021-10-29 | 2021-10-29 | Welding-free mounting method for bridge deck of steel trestle |
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Cited By (1)
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| CN115233546A (en) * | 2022-07-29 | 2022-10-25 | 四川省交通勘察设计研究院有限公司 | Continuous steel-concrete composite beam, bridge and construction method |
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Application publication date: 20220107 |