A method for overall assembly and lifting construction of a guy rope hanging basket structure

Abstract

The present application discloses a method for assembling and lifting a cable hanging basket structure as a whole. First, a bracket for casting the main beam 0# block segment and 1# block segment is set up on the outer periphery of the tower column, and a cable hanging basket assembly platform is set up on the ground; the main beam 0# block segment and 1# block segment are cast, and the cable hanging basket structure is assembled on the cable hanging basket assembly platform; a lifting station mechanism is installed on the 0# block segment and the 1# block segment, and the lifting station mechanism is cantilevered outside the 1# block segment, and the lifting station mechanism lifts the cable hanging basket structure upward; the brackets at the bottom of the 0# block segment and the 1# block segment are removed; the cable hanging basket structure is slid toward the tower column as a whole, and the end of the cable hanging basket structure close to the tower column is moved to the bottom of the 1# block segment, and the 1# block segment and the cable hanging basket structure are connected; a template system is installed at one end of the cable hanging basket structure located below the 2# block segment, and steel bars are tied in the template system, and then the 2# block segment concrete is poured. The present application has the effect of improving the construction efficiency of hanging basket casting construction.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a method for overall assembly and lifting construction of a guy-cable hanging basket structure. Background Art

[0002] The guy-cable hanging basket is mainly used for cantilever casting construction of the main beam of the cable-stayed bridge with prestressed concrete beam as the main beam. The guy-cable hanging basket is different from the ordinary hanging basket. The main feature is that part of the load in the cantilever casting construction is transmitted to the main beam through the middle anchor system, and the other part is transmitted to the tower column through the guy-cable anchor system, thereby greatly reducing the stress on the main beam and avoiding the practice of increasing the main beam cross-section and adding reinforcement due to construction reasons.

[0003] At present, in the cantilever casting construction of the main beam of the cable-stayed bridge, the 0# block segment is cast, and then the cable hanging basket system is built at both ends of the 0# block at the same time. Then, the cable-stayed cables are symmetrically tensioned at both ends of the 0# block segment of the main beam, and then concrete is poured in the cable hanging basket template to form the 1# block segment. Then, by moving the hanging basket system forward, the casting of the 2# block segment and the subsequent segments is gradually completed. However, in the conventional hanging basket cantilever casting construction, the hanging basket system needs to be erected only after the 0# block segment is formed, which prolongs the construction period and there is a problem of low construction efficiency. Therefore, there is still room for improvement. Summary of the invention

[0004] In order to improve the construction efficiency of hanging basket casting construction, the present application provides a method for overall assembly and lifting construction of a cable hanging basket structure.

[0005] The present application provides a method for overall assembly and lifting of a cable hanging basket structure, which adopts the following technical solutions:

[0006] A method for assembling and lifting a guy rope hanging basket structure as a whole, comprising the following steps:

[0007] S1: Set up brackets on the outer periphery of the tower column to serve as a construction platform for pouring the main beam 0# and 1# segments, connect the tower column with the inclined cables between the 1# segments on both sides, and set up a cable hanging basket assembly platform on the ground;

[0008] S2: Cast the main beam 0# block segment and 1# block segment, and assemble the guy wire hanging basket structure on the guy wire hanging basket assembly platform;

[0009] S3: After the 0# block segment and the 1# block segment are cast and formed, the lifting station mechanism is installed on the 0# block segment and the 1# block segment. The lifting station mechanism is cantilevered outside the 1# block segment, and the lifting station mechanism lifts the guy rope hanging basket structure upward;

[0010] S4: Remove the brackets at the bottom of the 0# block segment and the 1# block segment;

[0011] S5: slide the entire cable hanging basket structure toward the tower column, move the end of the cable hanging basket structure close to the tower column to below the 1# block segment, and position the end of the cable hanging basket structure away from the tower column below the casting position of the 2# block segment, then connect the 1# block segment and the cable hanging basket structure, and connect the inclined cable between the tower column and the 2# block segment;

[0012] S6: Install the formwork system at one end of the guyed basket structure below the 2# block segment, tie the steel bars inside the formwork system, and then pour the 2# block segment concrete.

[0013] By adopting the above technical scheme, by simultaneously building the brackets of the 0# block segment and the 1# block segment, so as to simultaneously cast the 0# block segment and the 1# block segment, the time for building the bracket is used to build a cable hanging basket assembly platform on the ground, and while casting the 0# block segment and the 1# block segment into shape, the cable hanging basket structure is assembled at the same time, and then after the 0# block segment and the 1# block segment are formed, the assembled cable hanging basket structure is directly lifted, and the synchronous construction is conducive to improving the construction efficiency of the hanging basket casting construction; then, by removing the bracket, the connection position between the traction hanging basket structure and the 1# block segment is vacated to improve the stability when pouring the 2# block segment concrete.

[0014] Preferably, in S4, before removing the support, the guy wire hanging basket structure is first lifted to one side of the support, and then the guy wire hanging basket structure is used as a construction platform to carry out the support removal work at the guy wire hanging basket structure.

[0015] By adopting the above technical solution, the cable hanging basket structure is used as a construction platform, so that construction workers can dismantle the bracket at the cable hanging basket structure, thereby eliminating the need to use a tower crane to build a construction platform on one side of the tower column, reducing the time required for platform construction and helping to shorten the construction period of the hanging basket casting construction.

[0016] Preferably, when casting the tower column, embedded parts are reserved on the outer wall of the tower column, and the embedded parts are located below the bracket according to the position; in S4, after the cable hanging basket structure is lifted to a side position of the bracket, the cable hanging basket structure and the embedded parts of the tower column side wall are connected with connecting parts.

[0017] Before the guy-cable basket structure and the tower are connected, the guy-cable basket structure is in a suspended state and has poor stability. By adopting the above technical solution, the guy-cable basket structure and the tower are connected by connecting parts. At this time, the lifting station structure still bears most of the load, and the connecting parts mainly play a limiting role on the guy-cable basket structure, which is beneficial to reduce the probability of shaking of the guy-cable basket structure during the support dismantling construction process.

[0018] Preferably, the connecting member is two I-beams parallel to each other, the I-beams are horizontally arranged at the bottom of the guying basket structure, and the two I-beams extend horizontally to both sides of the tower column and are fixedly connected to the embedded parts.

[0019] By adopting the above technical solution, the I-beam is horizontally set at the bottom of the cable hanging basket structure, and the I-beam is horizontally extended to one side of the tower column for fixation. Under the supporting effect of the I-beam, it is helpful to improve the situation where the cable hanging basket structure tilts forward or backward during the removal of the bracket.

[0020] Preferably, during the process of the lifting station mechanism lifting the guy wire hanging basket structure in S3, the two I-beams at the bottom of the guy wire hanging basket structure are respectively located on both sides of the tower column.

[0021] By adopting the above technical solution, the I-beam plays a limiting role on the cable hanging basket structure during the lifting process of the cable hanging basket structure, which is helpful to reduce the shaking of the cable hanging basket structure during the lifting process.

[0022] Preferably, the guy wire hanging basket structure is slidably connected to the I-beam, and in S5, the guy wire hanging basket structure slides toward the tower column side as a whole under the guidance of the I-beam.

[0023] By adopting the above technical solution, the I-beam plays a guiding role, which is beneficial to improving the movement stability of the cable hanging basket structure.

[0024] Preferably, in S4, before removing the bracket, a lifting system is first installed on the upper surface of the 0# block segment and the 1# block segment. When the guy wire hanging basket structure is lifted to one side of the bracket and the bracket is removed at the guy wire hanging basket structure, the lifting system is used to lift the disassembled bracket to the upper surface of the 0# block segment.

[0025] By adopting the above technical solution, it is convenient to carry and process the disassembled bracket components.

[0026] Preferably, during the dismantling construction of the S4 support, the hoisting system serves as a mobile platform for construction workers to travel back and forth between the 0# block segment and the guying basket structure.

[0027] By adopting the above technical solution, it is convenient for construction workers to travel back and forth between the 0# block segment and the cable hanging basket structure, so that construction workers can work on the cable hanging basket structure and rest and adjust in the 0# block segment.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. By building the brackets of the 0# block segment and the 1# block segment, the guy wire hanging basket assembly platform is built on the ground during the time of building the brackets. During the time of casting the 0# block segment and the 1# block segment, the guy wire hanging basket structure is assembled at the same time. After the 0# block segment and the 1# block segment are formed, the assembled guy wire hanging basket structure is directly hoisted. Synchronous construction is conducive to improving the construction efficiency of the hanging basket casting construction;

[0030] 2. By lifting the cable hanging basket structure to the position on one side of the bracket, the cable hanging basket structure is used as a construction platform, and the I-beam is used as a connecting piece between the cable hanging basket structure and the tower column, so that the construction workers can stably carry out the bracket removal work at the cable hanging basket structure, reducing the time required for platform construction, which is conducive to shortening the construction period of the hanging basket pouring construction;

[0031] 3. By installing the lifting system, it is not only convenient to carry and handle the disassembled bracket components, but also convenient for construction personnel to travel back and forth between the 0# block segment and the guy wire hanging basket structure, so that construction personnel can work on the guy wire hanging basket structure and rest and adjust on the 0# block segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the state after the bracket is installed in a method for overall assembly and lifting of a guy-cable hanging basket structure in an embodiment of the present application.

[0033] Figure 2 It is a schematic diagram of the state of installing a guy rope hanging basket assembly platform and a guy rope hanging basket structure in a guy rope hanging basket structure overall assembly and lifting construction method in an embodiment of the present application.

[0034] Figure 3 It is a schematic diagram of the state of lifting the cable hanging basket structure and removing the bracket in a method for overall assembly and lifting of the cable hanging basket structure in an embodiment of the present application.

[0035] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0036] Figure 5 It is a top view of a lifting station mechanism in a method for integrally assembling and lifting a guyed hanging basket structure according to an embodiment of the present application.

[0037] Figure 6 It is a schematic diagram of the state of a guying basket structure when it is in place in a guying basket structure overall assembly and lifting construction method according to an embodiment of the present application.

[0038] Figure 7 yes Figure 6 A magnified schematic diagram of point B in the middle.

[0039] Figure 8It is a schematic diagram of the state of pouring the 2# block segment in a method for overall assembly and lifting of a guy-hanging basket structure in an embodiment of the present application.

[0040] Fig. 9 yes Figure 8 Enlarged schematic diagram of point C in the middle.

[0041] Explanation of the reference numerals: 1. tower column; 2. 0# block segment; 3. 1# block segment; 4. bracket; 5. embedded parts; 6. inclined cable; 7. guy rope hanging basket assembly platform; 8. guy rope hanging basket structure; 81. I-beam; 9. 2# block segment; 10. lifting station structure; 101. 100t continuous jack; 102. transverse Bailey beam; 103. sliding longitudinal beam; 104. longitudinal Bailey beam; 105. slide seat; 106. connecting rod; 107. 30t continuous jack; 11. cantilever frame; 12. winch; 13. lifting platform. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-9 This application is described in further detail.

[0043] The present application embodiment discloses a method for assembling and lifting a rope hanging basket structure as a whole. The method comprises the following steps:

[0044] S1: Reference Figure 1 and Figure 2 , using a tower crane, set up a bracket 4 on the outer periphery of the tower column 1, which is used as a construction platform for pouring the main beam 0# block segment 2 and 1# block segment 3, then install the pouring formwork of the 0# block segment 2 and 1# block segment 3 on the bracket 4, and tie the main beam steel bars inside the pouring formwork, then connect the inclined cables 6 between the tower column 1 and the 1# block segments 3 on both sides, and at the same time set up a cable hanging basket assembly platform 7 on the ground.

[0045] S2: Cast the main beam 0# block segment 2 and 1# block segment 3, tension the main beam prestress at the same time, and symmetrically tension the inclined cables 6 of the 1# block segment 3 on both sides. In this application, the main beams on both sides of the tower column 1 are constructed simultaneously to make the tower column 1 more stable.

[0046] During the casting of the main beam 0# block segment 2 and 1# block segment 3, the cable hanging basket structure 8 is also assembled on the cable hanging basket assembly platform 7. The main structure (excluding the C-type sliding beam and reaction wheel structure) such as the main longitudinal beam, secondary longitudinal beam, common longitudinal beam, front cross beam, middle cross beam, rear cross beam, diagonal rod, hook, etc. is assembled on the cable hanging basket assembly platform 7. At this time, the center line of the rear cross beam is 6.6m away from the center line of the tower column 1.

[0047] After the installation of the guy wire hanging basket structure 8 is completed, a steel bottom formwork is laid on the surface of the guy wire hanging basket structure 8, which is used as a construction platform in the subsequent removal of the bracket 4.

[0048] In addition, two I-beams 81 are horizontally slidably connected at the bottom of the guying basket structure 8 . The length direction of the I-beams 81 is consistent with the length direction of the main beam, and the lateral spacing dimension of the two I-beams 81 is equal to the lateral width dimension of the tower column 1 .

[0049] S3: Reference Figure 3 and Figure 4 After the 0# block segment 2 and the 1# block segment 3 are cast and formed, the lifting station mechanism is installed on the 0# block segment 2 and the 1# block segment 3.

[0050] Reference Figure 4 and Figure 5 The lifting station structure 10 includes a plurality of longitudinal Bailey beams 104, a plurality of sliding longitudinal beams 103, a plurality of transverse Bailey beams 102 and a plurality of 100t continuous jacks 101. The longitudinal Bailey beam 104 has a length direction consistent with the extension direction of the main beam. The longitudinal Bailey beam 104 is installed and fixed on the upper end surface of the 0# block segment 2 and the 1# block segment 3, and one end thereof is cantilevered out of the 1# block segment 3. The plurality of Bailey beams are disposed on both sides of the 1# block segment 3.

[0051] The length of the sliding beam is consistent with the length direction of the longitudinal Bailey beam 104, and the sliding longitudinal beam 103 is arranged above the longitudinal Bailey beam 104, and a plurality of sliding longitudinal beams 103 are arranged at the front and rear ends of the longitudinal Bailey beam 104, and the transverse Bailey beam 102 is transversely erected on the two sliding longitudinal beams 103, and the transverse Bailey beam 102 is slidably connected to the upper surface of the sliding longitudinal beam 103 through a sliding seat 105; a plurality of 100t continuous jacks 101 are arranged on the upper end surface of the transverse Bailey beam and are arranged at both ends of the transverse Bailey beam 102. The steel strands of the plurality of 100t continuous jacks 101 are fixedly connected to the guy wire hanging basket structure 8, so as to increase the height of the guy wire hanging basket structure 8 through the 100t continuous jacks 101. The upper end surface of the sliding longitudinal beam 103 is installed with a 30t continuous jack 107, which is used to pull the slide 105 at the bottom of the transverse Bailey beam 102, and the slide 105 on the adjacent sliding longitudinal beam 103 on the same side is connected and fixed by a connecting rod 106, so that the 30t continuous jack 107 pulls the slide 105 longitudinally, driving the slide 105 to move along the length direction of the sliding longitudinal beam 103, thereby making the 100t continuous jack 101 move longitudinally, thereby realizing the function of moving the cable hanging basket structure 8 toward the tower column 1.

[0052] During the process of lifting the cable basket structure 8 by the lifting station mechanism, the two I-beams 81 at the bottom of the cable basket structure 8 are respectively located on both sides of the tower column 1. The I-beams 81 play a limiting role on the cable basket structure 8 during the lifting process of the cable basket structure 8, which is beneficial to reduce the shaking of the cable basket structure 8 during the lifting process.

[0053] S4: lift the cable basket structure 8 to one side of the bracket 4. The bracket 4 and the cable basket structure 8 are at the same height. It should be emphasized that when casting the tower column 1, embedded parts 5 are embedded in the outer wall of the tower column 1. The embedded parts 5 are located below the installation position of the bracket 4. When the cable basket structure 8 is lifted to the same height as the bracket 4, the I-beam 81 is also moved to the position of the embedded part 5. Then, the I-beam 81 and the embedded part 5 are fixed with bolts. The I-beam 81 serves as a connecting part to limit the cable basket structure 8, which is beneficial to reduce the probability of shaking of the cable basket structure 8 during the subsequent removal of the bracket 4.

[0054] In order to facilitate the construction workers to dismantle the support 4, a lifting system is first installed on the upper surface of the 0# block segment 2 and the 1# block segment 3. The lifting system includes a cantilever frame 11, a winch 12 and a lifting platform 13. The cantilever frame 11 is supported by a simple steel rod. The upper end of the cantilever frame 11 is cantilevered outside the 1# block segment 3. The winch 12 is installed above the cantilever frame 11. The lifting platform 13 is suspended on the cable hanging basket structure 8 through the traction rope of the winch 12. The winch 12 drives the lifting platform 13 to rise and fall, so that the construction workers can travel back and forth between the 0# block segment 2 and the cable hanging basket structure 8 through the lifting platform 13 during the dismantling of the support 4, and it is also convenient to carry and handle the disassembled support 4 components.

[0055] S5: Reference Figure 6 and Figure 7 , then remove the bracket 4 at the bottom of the 0# block segment 2 and the 1# block segment 3, take out the bolts of the I-beam 81 and the embedded parts 5, start the 30t continuous jack 107, slide the cable basket structure 8 as a whole toward the tower column 1, move the end of the cable basket structure 8 close to the tower column 1 to the bottom of the 1# block segment 3, and the end of the cable basket structure 8 away from the tower column 1 is located below the casting position of the 2# block segment 9, then start the 100t continuous forward jacking, so that the bottom template of the cable basket structure 8 is against the lower end surface of the 1# block segment 3. Then install the middle suspension rod and the rear suspension rod between the cable basket structure 8 and the 1# block segment 3, so as to connect the 1# block segment 3 and the cable basket structure 8, then pull the inclined cable 6 between the tower column 1 and the 2# block segment 9, and then adjust the middle suspension rod, the rear suspension rod and the inclined cable 6 traction rod so that the cable basket line shape meets the construction line shape.

[0056] S6: Reference Figure 8 and Fig. 9 , dismantle the lifting station structure 10 and the lifting system, install the formwork system at one end of the cable hanging basket structure 8 below the 2# block segment 9, tie the steel bars in the formwork system, then install the prestressed pipes, and pour the concrete of the 2# block segment 9. When the segment beam is half poured, according to the monitoring instructions, the inclined cable 6 is tensioned for the second time, and the remaining concrete is poured after adjustment.

[0057] S7: After the concrete of the 2# block segment 9 reaches the strength requirement, a slideway system is installed above the 2# block segment 9. The slideway system includes two longitudinally extending slide rails, which are slidably connected to the upper surface of the 2# block segment 9. Then, hooks are installed on both sides of the cable hanging basket structure 8. The hook portion of the hook extends from the outside of the 2# block segment 9 to the top of the 2# block segment 9. A jack is installed on the hook portion of the hook, and the jack is set vertically. At the same time, the middle hanger 83 and the rear hanger 82 are lowered, and the cable hanging basket structure 8 is moved down as a whole. While completing the demoulding, the hook is made to fall on the slide rail of the slideway system, and the jack of the hook is pressed against the slide rail. A reaction wheel is installed on the 2# block segment 9. The reaction wheel is used to drive the slide rail to slide longitudinally, thereby achieving the purpose of moving the hanging basket.

[0058] S8: Install continuous jacks on the slide rails, connect the steel strands of the continuous forward top with the cable hanging basket structure 8, drag the cable hanging basket 6.5m away from the tower column 1, move the cable hanging basket structure 8 to the 3# block segment, and after the basket is moved into place, install the middle hanger, rear hanger, and the extension rod of the 3# block segment inclined cable 6, lift the cable hanging basket structure 8 into place, re-anchor the cable hanging basket structure 8, and anchor the slide rails. Complete the connection between the cable hanging basket structure 8 and the 2# block segment 9, and the inclined cable 6 between the tower column 1 and the 3# block segment, then adjust the formwork system in place, tie the steel bars and cast in the casting position of the 3# block segment, and then cast the 3# block segment concrete.

[0059] S9: According to the above steps, construct the remaining standard sections of the main beam.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for assembling and lifting a guy rope hanging basket structure as a whole, characterized by: include: S1: a support (4) is set up on the outer periphery of the tower column (1) to serve as a construction platform for pouring the main beam 0# block segment (2) and 1# block segment (3), connecting the inclined cables (6) between the tower column (1) and the 1# block segments (3) on both sides, and at the same time, a cable hanging basket assembly platform (7) is set up on the ground; S2: Casting the main beam 0# block segment (2) and 1# block segment (3), and assembling the guy wire hanging basket structure (8) on the guy wire hanging basket assembly platform (7); S3: After the 0# block segment (2) and the 1# block segment (3) are cast and formed, a lifting station mechanism is installed on the 0# block segment (2) and the 1# block segment (3). The lifting station mechanism is cantilevered outside the 1# block segment (3), and the lifting station mechanism lifts the guy rope hanging basket structure (8) upwards; S4: Remove the bracket (4) at the bottom of the 0# block segment (2) and the 1# block segment (3); S5: the guy wire hanging basket structure (8) is slid as a whole toward the tower column (1), and the end of the guy wire hanging basket structure (8) close to the tower column (1) is moved to below the 1# block segment (3), and the end of the guy wire hanging basket structure (8) away from the tower column (1) is located below the casting position of the 2# block segment (9), and then the 1# block segment (3) and the guy wire hanging basket structure (8) are connected, and the inclined cable (6) between the tower column (1) and the 2# block segment (9) is connected; S6: Install a formwork system at one end of the guying basket structure (8) below the 2# block segment (9), tie steel bars inside the formwork system, and then pour concrete for the 2# block segment (9); In S4, before removing the support (4), the guy wire hanging basket structure (8) is first lifted to a side position of the support (4), and then the guy wire hanging basket structure (8) is used as a construction platform to carry out the removal work of the support (4) at the guy wire hanging basket structure (8); When pouring the tower column (1), an embedded part (5) is reserved on the outer wall of the tower column (1), and the embedded part (5) is located below the installation position of the bracket (4); in S4, after the guy wire hanging basket structure (8) is lifted to a position on one side of the bracket (4), the guy wire hanging basket structure (8) and the embedded part (5) on the side wall of the tower column (1) are connected by a connecting piece; In the above S4, before removing the support (4), a lifting system is first installed on the upper surface of the 0# block segment (2) and the 1# block segment (3). When the cable hanging basket structure (8) is lifted to a side position of the support (4) and the support (4) is removed at the cable hanging basket structure (8), the lifting system is used to lift the removed support (4) to the upper surface of the 1# block segment (3).

2. The method for assembling and lifting a guy-cable hanging basket structure as described in claim 1, characterized in that: The connecting member is two parallel I-beams (81), which are horizontally arranged at the bottom of the guying basket structure (8). The two I-beams (81) extend horizontally to both sides of the tower column (1) and are fixedly connected to the embedded parts (5).

3. The method for overall assembly and lifting of a guy-cable hanging basket structure according to claim 2 is characterized in that: During the process of the lifting station mechanism lifting the guy wire hanging basket structure (8) in S3, the two I-beams (81) at the bottom of the guy wire hanging basket structure (8) are respectively located on both sides of the tower column (1).

4. The method for overall assembly and lifting of a guy-cable hanging basket structure according to claim 2, characterized in that: The guy wire hanging basket structure (8) is slidably connected to the I-beam (81), and in S5, the guy wire hanging basket structure (8) slides as a whole toward the tower column (1) under the guidance of the I-beam (81).

5. The method for overall assembly and lifting of a guy-cable hanging basket structure according to claim 1, characterized in that: During the dismantling construction of the S4 support (4), the hoisting system serves as a mobile platform for construction workers to travel back and forth between the 1# block segment (3) and the guy wire hanging basket structure (8).

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