Line changing method of bridge erecting machine and beam piece erecting method of parallel double-line and multi-line bridge

Abstract

The invention relates to the technical field of bridge construction, in particular to a bridge girder erection machine line changing method and a parallel double-line and multi-line bridge beam piece erecting method.The bridge girder erection machine line changing method comprises the following steps that A1, a line changing platform is constructed between the current position of a bridge girder erection machine and a construction lag area, the line changing platform covers at least two lines in the transverse bridge direction, and the line changing platform covers the current position of the bridge girder erection machine; the line changing platform covers a plurality of piers in the longitudinal bridge direction, and the height of the line changing platform is larger than or equal to that of the piers. A2, the bridge erecting machine is moved to the line changing platform from the line where the bridge erecting machine is located, and the bridge erecting machine is made to turn on the line changing platform and move to the other line. According to the method, the defects that when an existing bridge girder erection machine is used for constructing parallel double-line and multi-line bridges under the condition that an overline girder lifter cannot be arranged, one line is constructed firstly, and then the other line is constructed in a U-turn mode are overcome; beam piece erection construction of all lines can be forced to stop, and shutdown loss is caused.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a method for changing the track of a bridge erecting machine and a method for erecting beams of parallel double-track and multi-track bridges. Background Technology

[0002] Bridge erecting machines are currently the most commonly used bridge construction equipment. They can move on existing bridge decks and piers and erect bridge beams on the piers. Due to the large size of bridge erecting machines, the long installation and dismantling time, and the inconvenience of turning, there are two existing conventional practices when using bridge erecting machines to erect parallel double-track or multi-track bridges (i.e., at least two tracks are set up in parallel, and the piers and beams of each track are independent of each other): First, the bridge erecting machine is moved along one track and all beams are erected. Then, it is rotated and turned around in an open area at the end of the other track or disassembled and reassembled at the end of the track to be erected, and then the beams of the other track are erected. Second, a cross-track lifting machine is set up in the parallel bridge section to directly lift the bridge erecting machine to the other track for box girder erection. Both of the above construction methods have their shortcomings: The first method is suitable for situations where the beam transport walkway in the beam yard can directly connect to the left and right parallel bridges, but long bridges are often limited by land acquisition and demolition, and the construction progress of special structures, making it difficult to connect the single-sided line, affecting the continuous production of the beam yard, and the workload of beam erection in the later stage is large; The second method is suitable for situations where the spacing between the left and right parallel bridge lines is small, and there is no space restriction on both sides when installing the cross-line lifting beam machine.

[0003] However, in actual construction, sometimes the construction progress of some bridge piers is delayed, which prevents the bridge erecting machine from continuously erecting all the beams of the corresponding line in the predetermined sequence. In addition, the spacing between the parallel bridge lines is too large or the space on both sides is limited so that the cross-line beam lifting machine cannot be installed. For example, in the construction of a double-line super bridge, the original plan was for the bridge erecting machine to first erect all the beams of the right line of the bridge, and then rotate and switch to the left line at the roadbed end of the left and right lines to erect the beams of the left line in the reverse direction. However, due to the obstruction of the construction progress of several bridge piers in the middle of the bridge, the bridge erecting machine could not pass through the corresponding piers. As a result, the bridge erecting machine could neither reach the second half of the right line to continue the erection of the right line beams, nor switch to the left line of the bridge to erect the left line beams first. This led to the stagnation of beam erection and made it difficult to meet the established construction progress requirements. The beam yard would also be forced to stop work due to the saturation of the beams, resulting in additional downtime losses. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing bridge erecting machines in the case of parallel double-track or multi-track bridges where the construction of one track is completed first and then the machine is turned around to construct the other track. This method is used because if the construction progress of a part of the bridge is delayed, the beam erection of all tracks will be forced to stop, resulting in work stoppage losses. The invention provides a bridge erecting machine track switching method and a beam erection method for parallel double-track or multi-track bridges.

[0005] In a first aspect, the present invention provides a method for changing the track of a bridge erecting machine, comprising the following steps: A1. Construct a line-changing platform between the current position of the bridge erecting machine and the construction lag area. The line-changing platform covers at least two lines along the transverse direction of the bridge and covers several bridge piers along the longitudinal direction of the bridge. The height of the line-changing platform is greater than or equal to the height of the bridge piers. A2. Move the bridge erecting machine from its current line to the line changing platform, and then turn and move the bridge erecting machine to another line on the line changing platform.

[0006] Preferably, a temporary bridge platform is also provided on the top of the line-changing platform, and the top surface of the temporary bridge platform is used to support the outriggers of the bridge erecting machine.

[0007] Preferably, the switching platform is also equipped with a pier, which is located on the side near the bridge pier; one side of the bottom surface of the temporary bridge abutment is supported by the bridge pier, and the other side of the bottom surface of the temporary bridge abutment is supported by the pier.

[0008] Preferably, at least one pile foundation is connected to the bottom surface of the pier, and the pile foundation is inserted into the line switching platform.

[0009] Preferably, the line-changing platform is formed by backfilling with earth.

[0010] Preferably, the top surface of the line-changing platform is provided with a load-bearing layer.

[0011] Preferably, the end of the line-changing platform closest to the area where construction is lagging behind protrudes along the transverse direction of the bridge towards the direction away from the line where the bridge erecting machine is located.

[0012] Preferably, the projected area of ​​the line-changing platform on the horizontal plane gradually increases from top to bottom.

[0013] Preferably, the line-changing platform is located in an area where the bridge piers are relatively low along the longitudinal direction of the bridge.

[0014] In a second aspect, the present invention provides a method for erecting beams of parallel double-track or multi-track bridges, comprising the following steps: B1. Use a bridge erecting machine to erect bridge beams along one of the lines; B2. Using the bridge erecting machine line-changing method of the present invention, the bridge erecting machine is changed to another line, and the bridge erecting machine continues to erect beams along the corresponding line.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a method for changing the track for a bridge erecting machine. By setting up a track-changing platform between the bridge erecting machine and the area where construction is lagging behind, the bridge erecting machine can move from one track to another when the current track is blocked. This allows for the early commencement of construction on the other track, avoiding stagnation in bridge construction and mitigating or even eliminating the adverse effects of local construction delays on the construction progress, thus meeting the predetermined construction schedule requirements. Simultaneously, it ensures the continuity of beam yard production operations, preventing the beam yard from being forced to stop work due to beam saturation and incurring downtime losses.

[0016] 2. This invention provides a method for erecting precast beams for parallel double-track and multi-track bridges. By using the bridge erecting machine line-changing method of this invention, the bridge erecting machine can change lines at any position on the parallel double-track and multi-track bridge, thereby greatly improving the flexibility of precast beam erection operations. This avoids the stagnation of beam erection work in the location of the parallel double-track and multi-track bridge due to local construction delays, thus ensuring the continuity of construction of the parallel double-track and multi-track bridges and beam yard production operations, ensuring that the construction progress of the parallel double-track and multi-track bridges can meet the predetermined requirements, and avoiding work stoppage losses. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the line-changing platform in a bridge erecting machine line-changing method according to the present invention; Figure 2 This is a schematic diagram of the planar structure of the line-changing platform in a bridge erecting machine line-changing method according to the present invention; Figure 3 This is a schematic diagram of the elevation structure of the line changing platform in a bridge erecting machine line changing method according to the present invention; Figure 4 This is a planar perspective structural diagram of the line-changing platform in a bridge erecting machine line-changing method according to the present invention; Figure 5 This is a partial three-dimensional structural diagram of a bridge erecting machine line changing method of the present invention at a temporary bridge abutment; icon: 1-Changing platform; 21-Bridge pier; 22-Beam segment; 3-Temporary abutment; 4-Pile cap; 5-Pile foundation; 6-Lack of construction area. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0019] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0021] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0022] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0023] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0024] Example 1 like Figures 1 to 5 As shown, a method for changing the line of a bridge erecting machine includes the following steps: A1. The bridge erecting machine is positioned at its current location, and a construction delay zone 6 is located at a construction line-changing platform 1. For example, for... Figures 1 to 4 The diagram shows a parallel double-track bridge with left and right lines. If the parallel double-track bridge includes piers 0 to 112 (21), and the bridge erecting machine is currently located at pier 57 (21), while the construction lag area 6 is located near pier 60 (21), then the track-changing platform 1 can be constructed within the area where piers 57 to 60 (21) are located.

[0025] Area 6 with construction delays specifically refers to areas where bridge erecting machines cannot pass, including but not limited to areas where construction progress is delayed due to technical reasons, such as areas where the construction of pier 21 is not completed, and areas where the construction of the lower continuous beam is not completed; or areas where construction progress is delayed due to non-technical reasons, such as areas where the demolition progress is hindered due to land acquisition issues.

[0026] The switching platform 1 covers at least two lines along the transverse direction of the bridge, meaning that the width of the switching platform 1 is greater than the distance between the two opposite sides of the two lines, and the two sides of the switching platform 1 extend beyond the corresponding sides of the two lines along the transverse direction of the bridge; the switching platform 1 covers a number of bridge piers 21 along the longitudinal direction of the bridge, and the specific number of bridge piers 21 covered is determined according to the space required for the bridge erecting machine to switch lines and turn; the height of the switching platform 1 is greater than or equal to the height of the bridge piers 21.

[0027] A2. Move the bridge erecting machine from its current line to the line changing platform 1, and then move the bridge erecting machine to another line in a herringbone pattern on the line changing platform 1. For example... Figure 2 As shown by the arrow in the image.

[0028] This bridge erecting machine line-changing method involves setting up a line-changing platform 1 between the bridge erecting machine and the construction lag area 6. This allows the bridge erecting machine to move from one line to another when the current line is blocked, thereby enabling the construction of the other line to proceed ahead of schedule. This avoids bridge construction stagnation and reduces or even eliminates the adverse impact of the local construction lag area 6 on the construction progress, thus meeting the established construction schedule requirements. At the same time, it also ensures the continuity of beam yard production operations, avoiding situations where the beam yard is forced to stop work due to beam saturation and incurring downtime losses.

[0029] In optional implementations, the specific structural form of the construction platform includes, but is not limited to, an earthen platform, a steel platform, a concrete platform, or a steel-concrete platform, as long as it can provide sufficient space for the bridge erecting machine to turn and change lanes.

[0030] In an optional embodiment, the line-changing platform 1 is formed by backfilling with earth. Compared with other forms, such as concrete platforms or steel platforms, this embodiment not only has lower construction costs and faster construction speed, but can also be more easily dismantled after the bridge erecting machine completes the line change, thereby avoiding the line-changing platform 1 from hindering subsequent construction and the operation of the bridge.

[0031] In an optional embodiment, the top surface of the line-changing platform 1 is provided with a load-bearing layer to prevent the line-changing platform 1 from softening, cracking or even collapsing under the pressure of the bridge erecting machine and beam transport vehicle and the action of rainwater. This is especially suitable for construction in rainy areas in the south. The load-bearing layer can adopt existing technologies, including but not limited to cement, lime and other inorganic binder stabilized base, concrete hardening, asphalt mixture paving, etc.

[0032] In an optional implementation, the load-bearing layer may preferably be composed of sand and gravel and cement mortar.

[0033] In an optional implementation, the load-bearing layer is at least one meter thick to ensure it has sufficient waterproofing and load-bearing capacity.

[0034] In an optional embodiment, a temporary bridge abutment 3 is also provided on the top of the line-changing platform 1. The temporary bridge abutment 3 can be located on the top surface of the line-changing platform 1, or it can be partially or completely embedded in the line-changing platform 1. The top surface of the temporary bridge abutment 3 is used to support the outriggers of the bridge erecting machine, and the projected area of ​​the temporary bridge abutment 3 in the horizontal plane is larger than the projected area of ​​the outriggers of the bridge erecting machine in the horizontal plane. This allows the load generated by the bridge erecting machine to be more evenly distributed over a larger area of ​​soil, thereby reducing the load borne per unit area of ​​the line-changing platform 1, and further reducing the risk of cracking or even collapse of the line-changing platform 1 due to local stress concentration. The specific location and number of temporary bridge abutments 3 are determined according to the actual support requirements of the outriggers of the bridge erecting machine, for example... Figure 1 As shown, in this embodiment, a temporary bridge abutment 3 is set up near the two bridge piers 21 that are furthest from the construction delay area 6 within the range of the line switching platform 1; the specific structural form of the temporary bridge abutment 3 includes, but is not limited to, timber, steel blocks or concrete blocks.

[0035] In an optional embodiment, a bearing platform 4 is also provided inside the line-changing platform 1, with the bearing platform 4 located on the side near the pier 21; one side of the bottom surface of the temporary bridge abutment 3 is supported on the pad stone of the pier 21, and the other side of the bottom surface of the temporary bridge abutment 3 is supported on the bearing platform 4, so that the load on the temporary bridge abutment 3 can be transferred to the soil inside the line-changing platform 1 through the bearing platform 4, and can also be transferred to the foundation structure below the pier 21 through the pier 21. This allows the existing pier 21 to be used to ensure the bearing capacity of the temporary bridge abutment 3, and further improves the safety of the bridge erecting machine moving on the line-changing platform 1.

[0036] In an optional embodiment, at least one abutment 4 has a pile foundation 5 connected to its bottom surface. The pile foundation 5 is inserted into the transect platform 1, which can transfer the load on the temporary bridge abutment 3 downward to deeper and more stable soil, thereby further improving the bearing capacity of the temporary bridge abutment 3. The specific location of the pile foundation 5 depends on the load of the bridge erecting machine's outriggers, for example... Figure 3 As shown, in this embodiment, pile foundation 5 is connected only below the abutment 4 on the left side of the line; the specific structural form of pile foundation 5 includes, but is not limited to, steel pipe pile, prestressed pipe pile, concrete pile or steel pipe concrete pile.

[0037] In an optional implementation, at least two pile foundations 5 are provided at intervals under each temporary abutment 3 to further ensure the bearing capacity of the temporary abutment 3.

[0038] In an optional implementation, the diameter of the pile foundation 5 is greater than or equal to one meter.

[0039] In an optional implementation, the end of the line-changing platform 1 closest to the construction lag area 6 protrudes along the transverse direction of the bridge towards the direction away from the line where the bridge erecting machine is located, thereby... Figure 2 and Figure 4 As shown, the projection of the line-changing platform 1 on the horizontal plane presents a shape that is larger at one end and smaller at the other, with the smaller end closer to the bridge erecting machine and the larger end closer to the construction lag area 6. This shape matches the shape of the area swept by the bridge erecting machine when it performs a herringbone turn, which can reduce the area of ​​the line-changing platform 1, thereby reducing the construction cost of the line-changing platform 1 and increasing the construction speed of the line-changing platform 1.

[0040] In an optional implementation, the line-changing platform 1 is located in an area where the height of the piers 21 is relatively low along the longitudinal direction of the bridge to reduce the construction difficulty and cost of the line-changing platform 1. For example, if the parallel double-track or multi-track bridge includes piers 21 numbered 0 to 112, the bridge erecting machine is currently located at pier 21 number 50, the construction lag area 6 appears near pier 21 number 60, and the height of piers 21 numbered 54 to 57 is lower than the height of piers 21 numbered 57 to 60, then the line-changing platform 1 can be constructed in the area where piers 21 numbered 54 to 57 are located.

[0041] In an optional embodiment, the projected area of ​​the line changing platform 1 on the horizontal plane gradually increases from top to bottom, so that the line changing platform 1 forms a shape that is larger at the bottom and smaller at the top, thereby enhancing the stability of the line changing platform 1 and ensuring the safety of the bridge erecting machine moving on the line changing platform 1.

[0042] Example 2 A method for erecting beams of parallel double-track or multi-track bridges includes the following steps: B1. Use a bridge erecting machine to erect beam 22 along one of the lines; for example, for a parallel double-track bridge including left and right lines, the bridge erecting machine can first erect beam 22 along the right line in the forward direction; the specific structural form of beam 22 includes but is not limited to various existing beam forms such as box girder, slab girder, T-beam, and I-beam.

[0043] B2. Using one of the bridge erecting machine line-changing methods in Example 1, the bridge erecting machine is switched to another line, and the bridge erecting machine continues to erect beam segments 22 along the corresponding line; for example... Figure 2 As shown by the arrow, the bridge erecting machine switches from the right track to the left track via the line switching platform 1, and then erects the beam 22 of the left track in the opposite direction.

[0044] This method for erecting precast beams in parallel double-track and multi-track bridges utilizes a bridge erecting machine relocation method as described in Example 1. This allows the bridge erecting machine to relocate at any position on the parallel double-track and multi-track bridge without requiring the existing technology to first move the bridge erecting machine to the end of the track or dismantle and reassemble it. This significantly improves the flexibility of the precast beam erection operation, prevents the beam erection work in the location of the parallel double-track and multi-track bridge from stalling due to local construction delays, and ensures the continuity of construction and beam yard production operations for parallel double-track and multi-track bridges. This ensures that the construction progress of the parallel double-track and multi-track bridges meets the predetermined requirements and avoids work stoppage losses.

[0045] 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 within the protection scope of the present invention.

Claims

1. A method for changing the track of a bridge erecting machine, characterized in that, Includes the following steps: A1. A line-changing platform (1) is constructed between the current position of the bridge erecting machine and the construction lag area (6). The line-changing platform (1) covers at least two lines along the transverse direction of the bridge and covers several bridge piers (21) along the longitudinal direction of the bridge. The height of the line-changing platform (1) is greater than or equal to the height of the bridge piers (21). A2. Move the bridge erecting machine from its current line to the line changing platform (1), and turn the bridge erecting machine on the line changing platform (1) and move it to another line.

2. The method for changing the line of a bridge erecting machine according to claim 1, characterized in that, The top of the line-changing platform (1) is also provided with a temporary bridge platform (3), the top surface of which is used to support the outriggers of the bridge erecting machine.

3. The method for changing the line of a bridge erecting machine according to claim 2, characterized in that, The line-changing platform (1) is also provided with a support platform (4), which is located on the side of the bridge pier (21); one side of the bottom surface of the temporary bridge abutment (3) is supported by the bridge pier (21), and the other side of the bottom surface of the temporary bridge abutment (3) is supported by the support platform (4).

4. The method for changing the line of a bridge erecting machine according to claim 3, characterized in that, At least one of the foundations (4) has a pile foundation (5) connected to its bottom surface, and the pile foundation (5) is inserted into the interior of the line-changing platform (1).

5. A method for changing the track of a bridge erecting machine according to any one of claims 1 to 4, characterized in that, The line-changing platform (1) is formed by backfilling with earth.

6. A method for changing the line of a bridge erecting machine according to claim 5, characterized in that, The top surface of the line-changing platform (1) is provided with a load-bearing layer.

7. A method for changing the track of a bridge erecting machine according to any one of claims 1 to 4, characterized in that, The end of the line-changing platform (1) near the construction lag area (6) protrudes along the transverse direction toward the line where the bridge erecting machine is located.

8. A method for changing the track of a bridge erecting machine according to any one of claims 1 to 4, characterized in that, The projected area of ​​the line-changing platform (1) on the horizontal plane gradually increases from top to bottom.

9. A method for changing the track of a bridge erecting machine according to any one of claims 1 to 4, characterized in that, The line-changing platform (1) is located in the area where the height of the bridge pier (21) is relatively low along the longitudinal direction of the bridge.

10. A method for erecting beams of a parallel double-track or multi-track bridge, characterized in that, Includes the following steps: B1. Use a bridge erecting machine to erect beams along one of the lines (22). B2. Using any one of the bridge erecting machine line changing methods according to claims 1 to 9, the bridge erecting machine is changed to another line, and the bridge erecting machine continues to erect beams (22) along the corresponding line.

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