Box girder erection method and box girder prefabricating mold for high-speed railway construction

Abstract

The invention provides a box girder erection method and a box girder prefabricating mold for high-speed railway construction.The box girder erection method comprises the following steps that two gantry crane frames are driven to move to preset positions along longitudinal linear rails, and jacking assemblies on pier columns lift the gantry crane frames; the rail wheels of the two gantry crane frames are separated from the longitudinal linear rail; the longitudinal positioning beams on the two sides of the pier column are disassembled, transverse positioning beams are installed at the corresponding positions, and the transverse positioning beams are provided with transverse linear rails arranged in the second preset direction; the rail wheels of the gantry crane frame are changed from longitudinal arrangement to transverse arrangement, the jacking assembly places the gantry crane frame on the transverse positioning beam, and the rail wheels of the gantry crane frame are in sliding connection with the transverse linear rails; and the two gantry crane frames are driven to move back to back along the transverse linear rails, so that the box girder deflects by a preset angle. Compared with a bridge girder erection machine erection mode, the bridge girder erection machine is lower in cost, is not limited by the width of a girder surface to move, and is not easy to overturn.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed railway construction, and more specifically to a box girder erection method and a box girder prefabricated mold for high-speed railway construction. Background Art

[0002] With the rapid development of railway construction, higher requirements are put forward for the construction of new high-speed railways. In the process of erecting the bridge slab of the curved high-speed railway, the following problems exist: 1. Use a bridge erecting machine to erect box girders. Renting a bridge erecting machine requires high fees, which will result in high construction costs. 2. When erecting box girders in tunnels, the existing bridge erection machines are too high to carry out normal construction due to the height restriction of the top of the tunnel. 3. When the existing bridge-building machine is erecting a box girder on a curved railway path, it needs to turn on the box girder surface. Due to the narrow girder surface, the front and rear wheels of the bridge-building machine are suspended in the air and there are not enough fulcrums, which makes it easy to overturn. Summary of the invention

[0003] 1. Technical issues to be resolved The technical problem to be solved by the present invention is that the existing bridge erecting machine is prone to overturning when erecting a box girder on a curved high-speed railway path in a tunnel.

[0004] (II) Technical solution To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a box girder erection method, comprising the following steps: S1. Arrange longitudinal positioning beams on both sides of the pier respectively, and use a straight track beam to connect the longitudinal positioning beams of two adjacent piers to form two longitudinal straight tracks arranged along a first preset direction; S2, two gantry frames are arranged front and rear on the longitudinal linear track, the two gantry frames are used to carry box girders, the box girders are detachably connected to the gantry frames through connectors, and the rail wheels of the gantry frames are slidably connected to the longitudinal linear track; S3, driving the two gantry frames to move to a preset position along the longitudinal linear track, and the jacking assembly on the pier column lifts the gantry frames so that the track wheels of the two gantry frames are separated from the longitudinal linear track; S4, dismantling the longitudinal positioning beams on both sides of the pier column, and installing transverse positioning beams at corresponding positions, wherein the transverse positioning beams have transverse linear tracks arranged along a second preset direction, and the second preset direction does not coincide with the first preset direction; S5, changing the rail wheel of the gantry frame from a longitudinal setting to a transverse setting, the jacking assembly places the gantry frame on the transverse positioning beam, and makes the rail wheel of the gantry frame slidably connected with the transverse linear track; S6, driving the two gantry carriages to move in opposite directions along the transverse straight track, so that the box beam is deflected by a preset angle; S7, removing the connecting piece, and lifting the box beam by the jacking assembly on the pier column to separate the gantry carriage from the box beam; S8. Place receiving materials between the pier and the box beam, and lower the box beam through the jacking assembly on the pier, so that the box beam is placed on the receiving materials, thereby completing the erection of the box beam.

[0005] Preferably, in step S1, the two adjacent piers are a first pier and a second pier, two longitudinal positioning beams are arranged on both sides of the first pier, so that the center line of the longitudinal positioning beam coincides with the center line of the first pier, and another two longitudinal positioning beams are arranged on both sides of the second pier, so that the center line of the other two longitudinal positioning beams coincides with the center line of the second pier.

[0006] Preferably, before laying the longitudinal positioning beams and the linear track beams, a plurality of steel plates are laid on the ground along the length direction of the railway, and the longitudinal positioning beams and the linear track beams are placed on the steel plates.

[0007] Preferably, the gantry carriage frame comprises a crossbeam, a column and a track wheel, the two ends of the crossbeam are respectively fixedly connected to the columns, and the bottom of the column is detachably connected to the track wheel.

[0008] Preferably, the first preset direction is perpendicular to the second preset direction.

[0009] Preferably, rectangular tracks are provided on the longitudinal positioning beam, the linear track beam and the transverse positioning beam, and wheel grooves adapted to the rectangular tracks are provided on the track wheels.

[0010] Preferably, the method further comprises the following steps: S9, the jacking assembly on the pier lifts the gantry carriage frame to make the track wheels of the two gantry carriage frames detach from the longitudinal linear track, remove the transverse positioning beams on both sides of the pier, and install the longitudinal positioning beams at the corresponding positions to form a longitudinal linear track.

[0011] Preferably, the method further comprises the following steps: S10, drive the two longitudinal straight rails to move to the next span of the bridge.

[0012] Preferably, the method further comprises the following steps: S11, the jacking assembly lowers the gantry carriage frame onto the longitudinal linear track, and drives the two gantry carriage frames to move along the longitudinal linear track to the pier position of the next span of the bridge.

[0013] In the second aspect, the present invention also provides a prefabricated mold for box girders for high-speed railway construction, including an outer mold, an inner mold, a first support assembly, a second support assembly and a third support assembly. The outer mold and the inner mold can be combined to form a mold cavity for forming the box girder. The outer mold includes a bottom mold, a first side mold and a second side mold; the first side mold and the second side mold are arranged opposite to each other and are respectively hinged to the bottom mold, the first support assembly is connected to the first side mold and the second side mold, the inner mold includes a first flap mold, a second flap mold, a third flap mold and a fourth flap mold, the first flap mold is hinged to the second flap mold, the third flap mold is hinged to the fourth flap mold, the two ends of the second support assembly are respectively connected to the first flap mold and the second flap mold, and the two ends of the third support assembly are respectively connected to the third flap mold and the fourth flap mold.

[0014] (III) Beneficial effects The above technical solution of the present invention has at least the following advantages: In the present invention, the longitudinal positioning beams of two adjacent piers are connected by a linear track beam to form two longitudinal linear tracks arranged along the first preset direction, so that the two gantry carriages can move along the length direction of the longitudinal linear tracks, thereby realizing the longitudinal movement and transportation of the box beam; the longitudinal positioning beams are arranged at corresponding positions on both sides of the pier, and the longitudinal positioning beams can be disassembled. After the longitudinal positioning beams are disassembled, the transverse positioning beams can be directly installed, which is convenient and quick. After the transverse positioning beams are installed at the corresponding positions, the transverse positioning beams have transverse linear tracks arranged along the second preset direction. After the gantry carriage is lowered, it can move along the transverse linear track, thereby swinging the box beam placed thereon by a preset angle, thereby realizing the erection of the box beam on the curved path. Compared with the way of erecting the bridge erection machine, the present invention is not restricted by the width of the beam surface to the movement, and is not easy to overturn. And there is no need to rent a bridge erection machine, the composition structure is easy to obtain, and the construction cost can be greatly reduced. The height of the gantry carriage only needs to be slightly higher than the height of the pier, so the total height of the overall equipment is small, and it can be used in the case where the space between the top surface of the pier and the top surface of the tunnel is limited to ensure the smooth progress of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is one of the implementation flow charts of the box girder erection method provided in the embodiment of the present invention.

[0017] Figure 2 This is the second implementation flow chart of the box girder erection method provided in the embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the positions of the first pier, the second pier and the third pier provided in an embodiment of the present invention.

[0019] Figure 4 It is a structural schematic diagram of a prefabricated mold for box beams for high-speed railway construction provided by an embodiment of the present invention.

[0020] The reference numerals in the figures are: 1. First pier; 2. Second pier; 3. Third pier; 4. Longitudinal positioning beam; 5. Linear track beam; 6. First gantry frame; 7. Second gantry frame; 8. Lifting assembly; 9. Transverse positioning beam; 61. Track wheel; 91. Transverse linear track; 100. First box beam; 200. Second box beam; 101. First support assembly; 102. Second support assembly; 103. Third support assembly; 104. Bottom mold; 105. First side mold; 106. Second side mold; 107. First flap mold; 108. Second flap mold; 109. Third flap mold; 110. Fourth flap mold. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments: like Figure 1 , Figure 2 as well as Figure 3 As shown, this embodiment is explained by taking a specific curved high-speed railway path as an example: the curved high-speed railway path has a first pier 1, a second pier 2 and a third pier 3, wherein the central axes of the first pier 1 and the second pier 2 are located on the same straight line, and the central axis of the third pier 3 deviates from the central axis of the second pier 2 by a preset value, so as to form a curved path when a box girder is laid thereon.

[0025] An embodiment of the present invention provides a box girder erection method, comprising the following steps: S1. Longitudinal positioning beams 4 are laid on both sides of the first pier 1, the second pier 2 and the third pier 3, and the longitudinal positioning beams 4 between the first pier 1 and the second pier 2, and the longitudinal positioning beams 4 between the second pier 2 and the third pier 3 are connected by linear track beams 5 to form two longitudinal linear tracks arranged along a first preset direction. In this embodiment, the first preset direction is the central axis direction of the first pier 1; specifically, in order to avoid relative movement between the two longitudinal linear tracks, multiple cross bars can be used between the two longitudinal linear tracks to connect and fix the two longitudinal linear tracks, and when the two longitudinal linear tracks need to be moved, the multiple cross bars are removed. More specifically, the linear track beam 5 can be composed of multiple sections connected in sequence, or it can be an integrated structure. The longitudinal positioning beam 4 and the linear track beam 5 are fastened by bolts.

[0026] S2. Two gantry frames are arranged front and back on the longitudinal straight track, namely a first gantry frame 6 and a second gantry frame 7. The distance between the first gantry frame 6 and the second gantry frame 7 is roughly equal to the distance between the first pier 1 and the second pier 2. The two ends of the first box girder 100 are respectively placed on the crossbeam of the first gantry frame 6 and the crossbeam of the second gantry frame 7 for carrying the box girder. The first box girder 100 is detachably connected to the gantry frame through a connecting piece, and the track wheels 61 of the first gantry frame 6 and the second gantry frame 7 are slidably connected to the longitudinal linear track; specifically, in this embodiment, the connecting piece includes a first fixing ring embedded in the first box girder 100, a second fixing ring fixedly connected to the first gantry frame 6, a third fixing ring fixedly connected to the second gantry frame 7, and a steel cable. After the steel cable is tensioned, the first fixing ring is connected to the second fixing ring, and the third fixing ring is connected to the first fixing ring, so as to tie and fix the first box girder 100 on the first gantry frame 6 and the second gantry frame 7.

[0027] Then, the first gantry frame 6 and the second gantry frame 7 are driven to move to the first preset position along the longitudinal straight track. At this first preset position, the first gantry frame 6 is located near the first pier 1, and the second gantry frame 7 is located near the second pier 2. Then the jacking assembly 8 on the first pier 1 and the second pier 2 contacts the first box beam 100, and the jacking assembly works to lift the first box beam 100, so that the first box beam 100 is separated from the first gantry frame 6 and the second gantry frame 7. At this time, the first gantry frame 6 and the second gantry frame 7 can leave the bottom of the first box beam. A receiving material (specifically, a rubber pad) is placed between the first pier 1 and the second pier 2 and the first box beam 100, and the first box beam 100 is lowered by the jacking assembly on the first pier 1 and the second pier 2, so that the first box beam 100 is placed on the receiving material, and the erection of the first box beam 100 is completed. The method of driving the first gantry frame 6 and the second gantry frame 7 to move is specifically to set two winches in front of the second gantry frame 7, and the ropes of the two winches are respectively fixed on the two columns of the second gantry frame 7, and the second gantry frame 7 is pulled forward by winding the ropes of the winches. The above steps describe the method of laying the box beam on a straight path.

[0028] Next, let’s talk about the method of laying box girders on curved paths: S3, loading the second box beam 200 on the first gantry frame 6 and the second gantry frame 7, connecting the second box beam 200, the first gantry frame 6 and the second gantry frame 7 through a connecting piece, driving the first gantry frame 6 and the second gantry frame 7 to move to a second preset position along the longitudinal straight track, at which the first gantry frame 6 is located at the second pier 2, and the second gantry frame 7 is located at the third pier 3. The lifting components 8 on the second pier 2 and the third pier 3 respectively lift the first gantry frame 6 and the second gantry frame 7 (the second box beam 200 is lifted together with the first gantry frame 6 and the second gantry frame 7), so that the track wheels 61 of the first gantry frame 6 and the second gantry frame 7 are separated from the longitudinal straight track; S4. Dismantle the longitudinal positioning beams 4 on both sides of the second pier 2 and the third pier 3, and install the transverse positioning beams 9 at the corresponding positions. The transverse positioning beams 9 have transverse linear tracks 91 arranged along a second preset direction, and the second preset direction does not coincide with the first preset direction; the transverse positioning beams 9 are fastened to the linear track beams 5 by bolts.

[0029] S5. Change the track wheels of the first gantry frame 6 and the second gantry frame 7 from a longitudinal setting to a transverse setting. The lifting assembly 8 places the first gantry frame 6 and the second gantry frame 7 on the transverse positioning beam 9, and makes the track wheels of the first gantry frame 6 and the second gantry frame 7 slidably connected to the transverse straight track; specifically, the track wheels of the first gantry frame 6 and the second gantry frame 7 can be disassembled, and the fasteners (specifically, bolts) detachably connect and fix the track wheels to the gantry frame. The track wheels can be removed from the gantry frame by removing the fasteners, and then rotated to a preset connection angle (for example: when the first preset direction is perpendicular to the second preset direction, the preset connection angle is 90°) and then fastened and connected by the fasteners.

[0030] S6, drive the first gantry frame 6 and the second gantry frame 7 to move in opposite directions along the transverse straight track, so that the second box girder 200 is deflected by a preset angle; the driving method may be to set a winch on one side of the first gantry frame 6 along the length direction of the transverse straight track, the rope of the winch is fixedly connected to the first gantry frame 6, and the first gantry frame 6 is pulled to move by the winch; similarly, set a winch on the other side of the second gantry frame 7 along the length direction of the transverse straight track, the rope of the winch is fixedly connected to the second gantry frame 7, and the second gantry frame 7 is pulled to move by the winch; S7, removing the connecting piece, and lifting the second box beam 200 by means of the jacking assembly on the second pier 2 and the third pier 3, so as to separate the first gantry carriage frame 6 and the second gantry carriage frame 7 from the second box beam 200; S8. Place receiving materials between the second pier 2, the third pier 3 and the second box girder 200, and lower the second box girder 200 through the jacking assemblies on the second pier 2 and the third pier 3, so that the second box girder 200 is placed on the receiving materials, thereby completing the erection of the second box girder 200.

[0031] S9, the lifting assembly on the pier lifts the gantry carriage frame to make the track wheels of the two gantry carriage frames detach from the longitudinal linear track, remove the transverse positioning beams 9 on both sides of the second pier 2 and the third pier 3, and install the longitudinal positioning beams 4 at the corresponding positions to form a longitudinal linear track.

[0032] S10, driving the two longitudinal linear tracks to move to the next span of the bridge. Specifically, the longitudinal linear tracks can be pulled by a winch to move.

[0033] S11, the jacking assembly lowers the first gantry carriage frame 6 and the second gantry carriage frame 7 onto the longitudinal linear track, and drives the first gantry carriage frame 6 and the second gantry carriage frame 7 to move along the longitudinal linear track to the pier position of the next span of the bridge.

[0034] The above steps S3 to S11 are continuously repeated until all the box girders are erected.

[0035] Preferably, in step S1, the two adjacent piers are the first pier 1 and the second pier 2, two longitudinal positioning beams are arranged on both sides of the first pier 1, so that the center line of the longitudinal positioning beam coincides with the center line of the first pier 1, and two other longitudinal positioning beams are arranged on both sides of the second pier 2, so that the center line of the other two longitudinal positioning beams coincides with the center line of the second pier 2. The transverse linear track 91 is arranged in the direction of the center axis of the transverse positioning beam 9. Through the above technical solution, after the longitudinal positioning beam is disassembled, the transverse positioning beam 9 can be quickly positioned.

[0036] Preferably, before laying the longitudinal positioning beams and the linear track beams, a plurality of steel plates are laid on the ground along the length direction of the railway, and the longitudinal positioning beams and the linear track beams are placed on the steel plates. The steel plates can improve the strength of the ground and prevent the ground from settling.

[0037] Preferably, the first gantry frame 6 has the same structure as the second gantry frame 7. Taking the first gantry frame 6 as an example, the first gantry frame 6 includes a crossbeam, a column and a track wheel 61. The two ends of the crossbeam are respectively fixedly connected to the columns, and the bottom of the column is detachably connected to the track wheel.

[0038] Preferably, the first preset direction is perpendicular to the second preset direction.

[0039] Preferably, rectangular tracks are provided on the longitudinal positioning beam, the linear track beam and the transverse positioning beam, and wheel grooves matching the rectangular tracks are provided on the track wheels.

[0040] Preferably, the method further comprises the following steps: Second, as Figure 4 As shown, the present invention also provides a prefabricated mold for box girders for high-speed railway construction, including an outer mold, an inner mold, a first support assembly 101, a second support assembly 102 and a third support assembly 103. The outer mold and the inner mold can enclose a mold cavity for forming a box girder. The outer mold includes a bottom mold 104, a first side mold 105 and a second side mold 106; the first side mold 105 and the second side mold 106 are arranged opposite to each other and are respectively hinged to the bottom mold 104, the first support assembly 101 is connected to the first side mold 105 and the second side mold 106, the inner mold includes a first flap mold 107, a second flap mold 108, a third flap mold 109 and a fourth flap mold 110, the first flap mold is hinged to the second flap mold, the third flap mold is hinged to the fourth flap mold, the two ends of the second support assembly are respectively connected to the first flap mold and the second flap mold, and the two ends of the third support assembly are respectively connected to the third flap mold and the fourth flap mold.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A box girder erection method, characterized in that: The following steps are involved: S1. Arrange longitudinal positioning beams on both sides of the pier respectively, and use a straight track beam to connect the longitudinal positioning beams of two adjacent piers to form two longitudinal straight tracks arranged along a first preset direction; S2. Two gantry frames are arranged front and rear on the longitudinal linear track, the two gantry frames are used to carry box girders, the box girders are detachably connected to the gantry frames through connectors, and the track wheels of the gantry frames are slidably connected to the longitudinal linear track; S3, driving the two gantry frames to move to a preset position along the longitudinal linear track, and the jacking assembly on the pier column lifts the gantry frames so that the track wheels of the two gantry frames are separated from the longitudinal linear track; S4, dismantling the longitudinal positioning beams on both sides of the pier column, and installing transverse positioning beams at corresponding positions, wherein the transverse positioning beams have transverse linear tracks arranged along a second preset direction, and the second preset direction does not coincide with the first preset direction; S5, changing the rail wheel of the gantry frame from a longitudinal setting to a transverse setting, the jacking assembly places the gantry frame on the transverse positioning beam, and makes the rail wheel of the gantry frame slidably connected with the transverse linear track; S6, driving the two gantry carriages to move in opposite directions along the transverse straight track, so that the box beam is deflected by a preset angle; S7, removing the connecting piece, and lifting the box beam by the jacking assembly on the pier column to separate the gantry carriage from the box beam; S8. Place receiving materials between the pier and the box beam, and lower the box beam through the jacking assembly on the pier, so that the box beam is placed on the receiving materials, thereby completing the erection of the box beam.

2. The box girder erection method according to claim 1, characterized in that: In step S1, two adjacent piers are a first pier and a second pier, two longitudinal positioning beams are arranged on both sides of the first pier, so that the center line of the longitudinal positioning beam coincides with the center line of the first pier, and another two longitudinal positioning beams are arranged on both sides of the second pier, so that the center line of the other two longitudinal positioning beams coincides with the center line of the second pier.

3. The box girder erection method according to claim 1, characterized in that: Before laying the longitudinal positioning beams and the linear track beams, a plurality of steel plates are laid on the ground along the length direction of the railway, and the longitudinal positioning beams and the linear track beams are placed on the steel plates.

4. The box girder erection method according to claim 1, characterized in that: The gantry crane frame comprises a crossbeam, a column and a track wheel. The two ends of the crossbeam are respectively fixedly connected to the columns, and the bottom of the column is detachably connected to the track wheel.

5. The box girder erection method according to claim 1, characterized in that: The first preset direction is perpendicular to the second preset direction.

6. The box girder erection method according to claim 1, characterized in that: Rectangular tracks are arranged on the longitudinal positioning beam, the linear track beam and the transverse positioning beam, and wheel grooves matching the rectangular tracks are arranged on the track wheels.

7. The box girder erection method according to claim 1, characterized in that: The following steps are also included: S9, the jacking assembly on the pier lifts the gantry carriage frame to make the track wheels of the two gantry carriage frames detach from the longitudinal linear track, remove the transverse positioning beams on both sides of the pier, and install the longitudinal positioning beams at the corresponding positions to form a longitudinal linear track.

8. The box girder erection method according to claim 7, characterized in that: The following steps are also included: S10, drive the two longitudinal straight rails to move to the next span of the bridge.

9. The box girder erection method according to claim 8, characterized in that: The following steps are also included: S11, the jacking assembly lowers the gantry carriage frame onto the longitudinal linear track, and drives the two gantry carriage frames to move along the longitudinal linear track to the pier position of the next span of the bridge.

10. A prefabricated mold for box beams for high-speed railway construction, used for preparing box beams erected by the box beam erection method according to any one of claims 1 to 9, characterized in that: It includes an outer mold, an inner mold, a first supporting assembly, a second supporting assembly and a third supporting assembly. The outer mold and the inner mold can be combined to form a mold cavity for forming a box beam. The outer mold includes a bottom mold, a first side mold and a second side mold. The first side mold and the second side mold are arranged opposite to each other and are respectively hinged to the bottom mold. The first supporting assembly is connected to the first side mold and the second side mold. The inner mold includes a first flap mold, a second flap mold, a third flap mold and a fourth flap mold. The first flap mold is hinged to the second flap mold, and the third flap mold is hinged to the fourth flap mold. The two ends of the second supporting assembly are respectively connected to the first flap mold and the second flap mold, and the two ends of the third supporting assembly are respectively connected to the third flap mold and the fourth flap mold.

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