A steel cage lowering device and lowering method

Abstract

The present invention belongs to the technical field of bridge construction, and discloses a steel cage lowering device and a lowering method. The steel cage lowering device includes a guide rail, a bracket, a hoisting assembly, a hoisting drive and a limiter. The guide rail extends along the extension direction of the bridge; the bracket is movably arranged on the guide rail, and a lowering space with an adjustable cross-sectional width is arranged on the bracket. When the bracket is located above the pile hole, the lowering space can be aligned with the pile hole up and down, and the steel cage can enter the pile hole through the lowering space; the hoisting assembly is movably arranged on the bracket and can be connected to the steel cage, and the hoisting drive is used to drive the hoisting assembly to drive the steel cage to move downward; the limiter can be inserted into the steel cage located in the lowering space. The steel cage lowering device not only saves the time of moving the steel cage lowering device, improves the efficiency of the construction of multiple pile foundations, but also effectively solves the problem of insufficient space to install large hoisting equipment, reduces construction costs and construction difficulties, and is particularly suitable for large-diameter, ultra-long, variable-section pile foundations.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a reinforcement cage lowering device and a lowering method. Background Art

[0002] With the increasing demand for transportation and the restrictions on construction terrain and environment, the construction scale of super-long span bridges is expanding. At present, the foundation of such bridges mostly adopts large-diameter super-long variable-section pile foundations, because of their high bearing capacity, good stability and strong adaptability, they can better adapt to complex geological conditions and diversified load requirements, thus meeting the design requirements of super-long span bridges.

[0003] Since the pile diameter and pile length of large-diameter and ultra-long variable-section pile foundation are large, the weight of its steel cage is significantly increased, which puts forward higher requirements on the lifting capacity of the lifting equipment. Therefore, large-scale lifting equipment such as gantry cranes, crawler cranes, and floating cranes are currently used to lower the steel cages, and hangers are required to be set at the pile holes to accurately control the position and posture of the steel cages to ensure the quality of construction. However, under complex construction conditions such as mountainous areas or water areas, the installation of large-scale lifting equipment faces many restrictions. For example, in cliff areas, it is impossible to provide an installation platform for large-scale lifting equipment; in water areas, the installation cost of large-scale lifting equipment is high, and it will also occupy the working surface of the pile foundation, affecting the construction of the pile foundation. In addition, there are multiple piles in the bridge foundation. After one steel cage is lowered, the hanger needs to be removed and installed at other pile holes, which reduces the efficiency of construction.

[0004] Therefore, there is an urgent need for a reinforcement cage lowering device and a lowering method to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a steel cage lowering device and a lowering method, which not only saves the time of moving and installing the steel cage lowering device, significantly improves the efficiency of multiple pile foundation construction, but also effectively solves the problem of insufficient space for installing large lifting equipment in complex construction environments, reduces construction costs and construction difficulty, and is particularly suitable for large-diameter and ultra-long variable-section pile foundations.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] On the one hand, a steel cage lowering device is provided, wherein a plurality of pile holes are arranged at intervals along the extension direction of the bridge, and the steel cage lowering device is used to hoist the plurality of steel cages into the corresponding pile holes, and the steel cage lowering device comprises:

[0008] A plurality of guide rails can be symmetrically installed on both sides of a plurality of pile holes and extend along the extension direction of the bridge;

[0009] The bracket is movably arranged on the plurality of guide rails along the extension direction of the guide rails, and the bracket can be limited to be located above any pile hole. A lowering space with an adjustable cross-sectional width is arranged on the bracket. When the bracket is located above the pile hole, the lowering space can be aligned with the corresponding pile hole up and down, and the steel cage can enter the corresponding pile hole through the lowering space;

[0010] A hoisting assembly and a hoisting drive, wherein the hoisting assembly is movably arranged on the bracket and can be connected to the steel cage, the hoisting drive is arranged on the bracket, and the output end of the hoisting drive is connected to the hoisting assembly, and is used to drive the hoisting assembly to drive the steel cage to move downward;

[0011] A plurality of limiting members are arranged at intervals along the circumference of the bracket. The limiting members are movably arranged on the bracket. The limiting members can be inserted into the steel cage located in the lowering space.

[0012] Optionally, the lifting assembly includes a pulley block, a connecting rope and a hook. The pulley block is movably arranged on the top of the bracket. One end of the connecting rope is connected to the lifting drive component, and the other end is wrapped around the pulley block and connected to the hook. The hook can be connected to the steel cage, and the lifting drive component is used to drive the connecting rope to drive the hook to move.

[0013] Optionally, the pulley block includes a plurality of fixed pulleys and a plurality of movable pulleys, the fixed pulleys are movably arranged at the top of the bracket along the width direction of the lowering space, and the other end of the connecting rope is wound around the plurality of movable pulleys and the plurality of fixed pulleys and connected to the hook.

[0014] Optionally, the steel cage lowering device also includes a width adjusting member and a pushing member located in the lowering space, one end of the width adjusting member is connected to the bracket, and the other end is connected to the pushing member, and the length of the width adjusting member along the width direction of the lowering space is adjustable. When the length of the width adjusting member changes, the width adjusting member can drive the pushing member to move so that the pushing member contacts the steel cage located in the lowering space.

[0015] Optionally, a locking piece is provided on the width adjusting piece, and the locking piece has a locking state for limiting the extension length of the width adjusting piece and an unlocking state for releasing the restriction on the extension length of the width adjusting piece. In the locked state, the pushing piece can contact the steel cage located in the lowering space, and in the unlocked state, the extension length of the width adjusting piece is adjustable.

[0016] Optionally, a travel drive member and a sliding member are provided at the bottom of the bracket, the sliding member is slidably matched with the guide rail, and the output end of the travel drive member is connected to the sliding member for driving the sliding member to slide along the guide rail.

[0017] Optionally, a clamping member is provided on the sliding member, and the clamping member has a clamping state for clamping the guide rail and an active state for releasing the guide rail. In the clamping state, the sliding member is limited above the pile hole, and in the active state, the sliding member can slide along the guide rail.

[0018] Optionally, the bracket includes a base, and a plurality of limiting holes are arranged on the base. The plurality of limiting holes correspond to the plurality of limiting members one by one, and the limiting members are movably arranged in the corresponding limiting holes.

[0019] Optionally, the bracket includes a plurality of columns, the plurality of columns are arranged at intervals along the circumference of the pile hole, a plurality of connecting beams are arranged between any two adjacent columns, the plurality of connecting beams are arranged at intervals along the vertical direction, a plurality of diagonal braces are arranged between any two adjacent connecting beams along the vertical direction, and the diagonal braces are inclined along the vertical direction, the plurality of columns and the plurality of connecting beams are surrounded to form a lowering space, and the lifting assembly is movably arranged on the connecting beams.

[0020] On the other hand, a method for lowering a steel cage is provided, wherein the steel cage is lowered using the above-mentioned steel cage lowering device, comprising the following steps:

[0021] S1. Move the bracket along the guide rail to the top of the pile hole corresponding to the steel cage to be lowered;

[0022] S2. adjusting the cross-sectional width of the lowering space according to the specifications of the steel cage to be lowered, and hoisting the steel cage to be lowered into the lowering space by hoisting equipment;

[0023] S3, adjusting the position of the hoisting assembly according to the specifications of the steel cage to be lowered, connecting the hoisting assembly to the steel cage just hoisted into the lowering space, and separating the hoisting equipment from the steel cage just hoisted into the lowering space;

[0024] S4, using the hoisting assembly to move the steel cage connected thereto down to a preset position;

[0025] S5, inserting a plurality of limit members into the steel cage located in the lowering space;

[0026] S6. adjusting the cross-sectional width of the lowering space according to the cross-sectional width of the next steel cage section to be lowered, and hoisting the next steel cage section into the lowering space using a hoisting device;

[0027] S7, connecting the next section of the steel cage to the steel cage at the preset position;

[0028] S8. Repeat steps S3 to S7 until the multiple sections of steel cages are lowered into the corresponding pile holes.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a steel cage lowering device and a lowering method, wherein the guide rail extends along the extension direction of the bridge, and the bracket can move along the guide rail, so that the bracket can be moved to any pile hole, that is, after the steel cage in one pile hole is lowered, the guide rail can be used to move the bracket to another pile hole to lower the corresponding steel cage, without repeatedly removing and installing the bracket, saving the time of removing, moving and installing the steel cage lowering device, and significantly improving the efficiency of pile foundation construction. Before the steel cage is lowered, the cross-sectional width of the lowering space is adjusted to be the same as the cross-sectional width of the steel cage to be lowered, so that the steel cage can be constrained along its circumference during the lowering process, avoiding the steel cage from tilting or swinging during the lowering process, ensuring the position and posture of the steel cage lowering, and ensuring the quality of the pile foundation construction; moreover, by adjusting the cross-sectional width of the lowering space, the bracket can also adapt to the lowering of steel cages with different cross-sectional widths, so as to adapt to the construction of large-diameter, ultra-long, variable-section pile foundations. By adjusting the position of the hoisting assembly on the bracket, the hoisting assembly can be connected to the steel cage with different cross-sectional widths to further adapt to the construction of large-diameter, ultra-long, variable-section pile foundations and ensure the stability of the hoisting and lowering of the steel cage. After the limiter is inserted into the steel cage located in the lowering space, the steel cage and the multiple steel cages connected to the steel cage can be fixed at the current position, which is convenient for the staff to connect the steel cage already in the lowering space with the steel cage just hoisted into the lowering space. After the above two steel cages are connected, the hoisting assembly can be used to drive the multiple steel cages located in the lowering space to move down together, so as to realize the lowering of the multiple steel cages. Compared with the prior art, the steel cage lowering device provided by the present invention allows the hoisting equipment to hoist only one steel cage into the lowering space each time, which reduces the requirements for the lifting weight of the hoisting equipment, so that there is no need to use large hoisting equipment, which effectively solves the problem of insufficient space to install large hoisting equipment in complex construction environments, and also reduces construction costs. It is particularly suitable for large-diameter, ultra-long, variable-section pile foundations. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a top view of the reinforcement cage lowering device provided by the present invention;

[0032] Figure 2 yes Figure 1 AA section view;

[0033] Figure 3 yes Figure 2 The enlarged view of point B in the middle;

[0034] Figure 4 yes Figure 1 CC profile of ;

[0035] Figure 5 The present invention is a flow chart of the method for lowering a reinforcement cage.

[0036] In the figure:

[0037] 100, pile hole; 200, steel cage;

[0038] 1. Guide rail;

[0039] 2. Bracket; 21. Lowering space; 22. Base; 221. Limiting hole; 23. Column; 24. Connecting beam; 25. Flange;

[0040] 3. Lifting assembly; 31. Pulley block; 311. Fixed pulley; 312. Movable pulley; 313. Weight; 32. Connecting rope; 33. Hook;

[0041] 4. Lifting drive parts;

[0042] 5. Limiting parts;

[0043] 6. Integrated control cabinet;

[0044] 71. Width adjusting member; 72. Pushing member;

[0045] 81. Travel driving member; 82. Sliding member; 83. Clamping member;

[0046] 91. Ladder cage; 92. Construction platform; 93. Safety guardrail. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] Embodiment 1

[0052] like Figures 1 to 4 As shown, this embodiment provides a steel cage lowering device, which not only saves the time of moving and installing the steel cage lowering device, significantly improves the efficiency of multiple pile foundation construction, but also effectively solves the problem of insufficient space to install large lifting equipment in complex construction environments, reduces construction costs and construction difficulty, and is particularly suitable for large-diameter and ultra-long variable-section pile foundations.

[0053] See also Figure 1 and Figure 2 , a plurality of pile holes 100 are arranged at intervals along the extension direction of the bridge, and the steel cage lowering device is used to hoist the multi-section steel cage 200 into the corresponding pile holes 100. The steel cage lowering device includes a plurality of guide rails 1, a bracket 2, a hoisting assembly 3, a hoisting drive 4 and a plurality of limiters 5. The plurality of guide rails 1 can be symmetrically installed on one side of the plurality of pile holes 100, and are all arranged along the extension direction of the bridge ( Figure 1 The bracket 2 is movably disposed on the plurality of guide rails 1 along the extension direction of the guide rail 1, and the bracket 2 can be limited to the top of any pile hole 100, and the bracket 2 is provided with a cross-sectional width ( Figure 1The bracket 2 is provided with a lowering space 21 which is adjustable in the X direction or Y direction. When the bracket 2 is located above the pile hole 100, the lowering space 21 can be aligned with the corresponding pile hole 100 up and down, and the steel cage 200 can enter the corresponding pile hole 100 through the lowering space 21. The hoisting assembly 3 is movably arranged on the bracket 2 and can be connected with the steel cage 200. The hoisting driving member 4 is arranged on the bracket 2. The output end of the hoisting driving member 4 is connected with the hoisting assembly 3, which is used to drive the hoisting assembly 3 to drive the steel cage 200 to move downward. A plurality of limiting members 5 are arranged at intervals along the circumference of the bracket 2. The limiting members 5 are movably arranged on the bracket 2. The limiting members 5 can be inserted into the steel cage 200 located in the lowering space 21.

[0054] The steel cage lowering device provided in this embodiment has a guide rail 1 extending along the extension direction of the bridge, and the bracket 2 can move along the guide rail 1, so that the bracket 2 can be moved to any pile hole 100. That is, after the lowering of the steel cage 200 in one pile hole 100 is completed, the guide rail 1 can be used to move the bracket 2 to another pile hole 100 to lower the corresponding steel cage 200. There is no need to repeatedly dismantle and install the bracket 2, which saves the time of dismantling, moving and installing the steel cage lowering device, and significantly improves the efficiency of pile foundation construction. Before the steel cage 200 is lowered, the cross-sectional width of the lowering space 21 is adjusted to be the same as the cross-sectional width of the steel cage 200 to be lowered, so that the steel cage 200 can be constrained along its circumferential direction during the downward movement, avoiding the steel cage 200 from tilting or swinging during the lowering process, ensuring the position and posture of the steel cage 200 lowered, and ensuring the quality of the pile foundation construction; moreover, by adjusting the cross-sectional width of the lowering space 21, the bracket 2 can also adapt to the lowering of steel cages 200 with different cross-sectional widths to adapt to the construction of large-diameter, ultra-long, variable-section pile foundations. By adjusting the position of the hoisting assembly 3 on the bracket 2, the hoisting assembly 3 can be connected to the steel cage 200 with different cross-sectional widths to further adapt to the construction of large-diameter, ultra-long, variable-section pile foundations, and ensure the stability of the hoisting and lowering of the steel cage 200. After the limiter 5 is inserted into the steel cage 200 located in the lowering space 21, the steel cage 200 and the multiple steel cages 200 connected to the steel cage 200 can be fixed at the current position, so that the staff can connect the steel cage 200 already located in the lowering space 21 with the steel cage 200 just hoisted into the lowering space 21. After the above two steel cages 200 are connected, the hoisting assembly 3 can be used to drive the multiple steel cages 200 located in the lowering space 21 to move downward together, so as to realize the lowering of the multiple steel cages 200. Compared with the prior art, the steel cage lowering device provided in this embodiment allows the hoisting equipment to hoist only one steel cage 200 into the lowering space 21 at a time, which reduces the lifting weight requirements of the hoisting equipment, so that there is no need to use large hoisting equipment, which effectively solves the problem of insufficient space to install large hoisting equipment in complex construction environments, and also reduces construction costs. It is particularly suitable for large-diameter and ultra-long variable-section pile foundations.

[0055] In this embodiment, refer to Figure 1 , two guide rails 1 are provided and symmetrically arranged along the bracket 2, and the pile hole 100 is located between the two guide rails 1 to ensure the stability of the bracket 2 during movement. In other embodiments, four or six guide rails 1 can also be provided, and two or three pile holes 100 are provided on each side, that is, the number of guide rails 1 can be an even number.

[0056] Optionally, see Figure 3 and Figure 4 The hoisting assembly 3 includes a pulley block 31, a connecting rope 32 and a hook 33. The pulley block 31 is movably arranged at the top of the bracket 2. One end of the connecting rope 32 is connected to the hoisting drive 4, and the other end is wound around the pulley block 31 and connected to the hook 33. The hook 33 can be connected to the steel cage 200. The hoisting drive 4 is used to drive the connecting rope 32 to drive the hook 33 to move, so as to drive the steel cage 200 to move downward. The connecting rope 32 is used to connect the hoisting drive 4 and the hook 33 to drive the hook 33 to move up and down; by moving the position of the pulley block 31 at the top of the bracket 2, the hook 33 can also be driven to move, so that the hook 33 can lift the steel cage 200 with different cross-sectional widths; and the setting of the pulley block 31 can also change the extension direction of the connecting rope 32 to ensure that the hook 33 can only move in the vertical direction, ensuring the position and posture of the steel cage 200 when it is lowered.

[0057] Specifically, see Figure 1 , Figure 2 and Figure 3 The cross-sectional shape of the bracket 2 is rectangular, and four groups of hoisting components 3 and hoisting driving components 4 are provided. The four groups of hoisting components 3 are respectively provided at the four corners of the top of the bracket 2, and the four hoisting driving components 4 are provided at the bottom of the bracket 2, and the four groups of hoisting components 3 correspond to the four hoisting driving components 4 one by one. The provision of four groups of hoisting components 3 can disperse the gravity of the steel cage 200 exerted on each hook 33, thereby reducing the lifting weight requirement of the hoisting driving components 4.

[0058] Further, see Figure 1 and Figure 3 Four integrated control cabinets 6 are also provided on the bracket 2. The four integrated control cabinets 6 correspond to the four hoisting drive components 4 one by one. The integrated control cabinets 6 are electrically connected to the corresponding hoisting drive components 4. The four integrated control cabinets 6 are configured to simultaneously control the opening and closing of the four hoisting drive components 4 and the lifting force of the four hoisting drive components 4, so that the four hooks 33 can move to the same height at the same time, avoiding the steel cage 200 from tilting or swinging during the lowering process, ensuring the lowering position and posture of the steel cage 200, and ensuring the quality of the pile foundation construction.

[0059] For example, the connecting rope 32 is a steel wire rope, the hoisting drive 4 is a winch, and the steel wire rope is wound around the drum of the winch. The winch is a light and small lifting equipment that occupies a small space and can be used in complex construction environments. Specifically, the winch is turned on, the drum rotates to release the steel wire rope, and the length of the steel wire rope between the hoisting drive 4 and the hook 33 increases, so that the hook 33 moves downward, thereby completing the lowering of the steel cage 200.

[0060] In this embodiment, refer to Figure 3 The pulley block 31 includes a plurality of fixed pulleys 311 and a plurality of movable pulleys 312. The fixed pulleys 311 are arranged along the width direction of the lowering space 21 ( Figure 3 The connecting rope 32 is movably arranged on the top of the bracket 2 (in the Y direction in FIG. 1 ), and the other end of the connecting rope 32 is wound around a plurality of movable pulleys 312 and a plurality of fixed pulleys 311 and connected to the hook 33. By moving the positions of the plurality of fixed pulleys 311, the relative position between the fixed pulley 311 and the movable pulley 312 can be changed, thereby realizing the change of the position of the hook 33; by changing the way in which the connecting rope 32 is wound around a plurality of fixed pulleys 311 and a plurality of movable pulleys 312, the position of the hook 33 can also be changed, so as to further adapt to the lowering of the steel cage 200 with different cross-sectional widths.

[0061] Specifically, the relative position between the fixed pulley 311 and the movable pulley 312 includes that the fixed pulley 311 is located on one side of the movable pulley 312 or the fixed pulley 311 is located directly above the movable pulley 312. The connecting rope 32 can be firstly wound around the fixed pulley 311 or the movable pulley 312. The relative position between the fixed pulley 311 and the movable pulley 312, the number of fixed pulleys 311 and movable pulleys 312, and the way in which the connecting rope 32 is wound need to be determined according to the specific construction situation.

[0062] Further, see Figure 3 A weight 313 is hung below the movable pulley 312, and the weight 313 is used to increase the weight of the movable pulley 312 to prevent the movable pulley 312 from moving.

[0063] Optionally, see Figure 1 and Figure 4 The steel cage lowering device also includes a width adjusting member 71 and a push member 72 located in the lowering space 21. One end of the width adjusting member 71 is connected to the bracket 2, and the other end is connected to the push member 72. The width adjusting member 71 is arranged along the width direction of the lowering space 21 ( Figure 1 The length of the width adjusting member 71 (in the X direction or Y direction) is adjustable. When the length of the width adjusting member 71 changes, the width adjusting member 71 can drive the push member 72 to move so that the push member 72 contacts the steel cage 200 located in the lowering space 21, thereby preventing the steel cage 200 from tilting or swinging during the lowering process, thereby ensuring the lowering position and posture of the steel cage 200.

[0064] For example, see Figure 1 and Figure 4 The cross-sectional shape of the bracket 2 is rectangular, and four width adjusting members 71 and four pushing members 72 are provided. The four width adjusting members 71 are arranged on the four walls of the bracket 2, and the four pushing members 72 correspond to the four width adjusting members 71 one by one to ensure that the steel cage 200 located in the lowering space 21 can be constrained along its circumferential direction.

[0065] Further, see Figure 4 The push member 72 adopts a push plate extending in the vertical direction to ensure that the steel cage 200 can always be constrained by the push member 72 during the lowering process and is not prone to tilting or swinging.

[0066] In this embodiment, a locking member is provided on the width adjusting member 71, and the locking member has a locking state for limiting the extension length of the width adjusting member 71 and an unlocking state for releasing the extension length of the width adjusting member 71. In the locked state, the push member 72 can contact the steel cage 200 located in the lowering space 21, and in the unlocking state, the extension length of the width adjusting member 71 is adjustable. The setting of the locking member enables the push member 72 to remain stationary, so as to ensure that the push member 72 can always contact the steel cage 200 during the lowering process of the steel cage 200, and ensure the position and posture of the lowered steel cage 200.

[0067] Specifically, the width adjustment member 71 includes a first adjustment rod and a second adjustment rod, the first adjustment rod is connected to the bracket 2, the second adjustment rod is connected to the push member 72, the first adjustment rod is provided with a slide extending along the width direction of the lowering space 21, the second adjustment rod is provided with a slider, and the end of the second adjustment rod away from the push member 72 is slidably connected to the first adjustment rod through the slider and the slide. The inner wall of the slide is provided with a plurality of limit grooves arranged at intervals along the extension direction thereof, and a locking member is provided on the slider, and the locking member can be inserted into or out of any limit groove. When the locking member is inserted into the limit groove, the locking member is in a locked state to ensure that the push member 72 can stably contact the steel cage 200 during the lowering process of the steel cage 200, thereby constraining the lowering direction of the steel cage 200. When the locking member is out of the limit groove, the second adjustment rod can slide relative to the first adjustment rod to adjust the extension length of the width adjustment member 71.

[0068] In other embodiments, the width adjusting member 71 is a telescopic rod, and when the telescopic rod is extended or retracted, the extension length of the width adjusting member 71 changes.

[0069] Optionally, see Figure 1 and Figure 2The bottom of the bracket 2 is provided with a travel drive member 81 and a sliding member 82, the sliding member 82 is slidably matched with the guide rail 1, and the output end of the travel drive member 81 is connected to the sliding member 82, which is used to drive the sliding member 82 to slide along the guide rail 1 to realize the movement of the bracket 2 on the guide rail 1. When the bracket 2 moves to the pile hole 100 where the steel cage 200 is to be lowered, the travel drive member 81 is controlled to stop working, and the sliding member 82 stops moving, and the bracket 2 can be limited to the current position to facilitate the lowering of the steel cage 200.

[0070] For example, see Figure 2 The sliding member 82 adopts a roller, and the roller and the guide rail 1 are rollingly matched. The travel driving member 81 adopts a motor, and the output end of the motor is connected to the roller to drive the roller to roll, and the roller drives the bracket 2 to move along the guide rail 1 as a whole.

[0071] Furthermore, the steel cage lowering device also includes a reducer, and the travel drive member 81 is connected to the roller through the reducer to reduce the rotation speed of the roller, thereby ensuring the stability of the movement of the bracket 2.

[0072] Further, see Figure 1 and Figure 2 There are multiple sliding members 82 and multiple traveling driving members 81, and the multiple sliding members 82 correspond to the multiple traveling driving members 81 one by one, so as to improve the driving force for driving the bracket 2 to move and ensure that the bracket 2 can move smoothly along the guide rail 1.

[0073] In this embodiment, refer to Figure 1 and Figure 2 The sliding member 82 is provided with a clamping member 83, which has a clamping state for clamping the guide rail 1 and an active state for releasing the guide rail 1. In the clamping state, the sliding member 82 is limited to the upper part of the pile hole 100 to prevent the bracket 2 from moving during the lowering of the steel cage 200, which affects the construction quality; in the active state, the sliding member 82 can slide along the guide rail 1 to drive the bracket 2 to move to the upper part of other pile holes 100 to lower the steel cage 200 of other pile foundations. When the clamping member 83 clamps the guide rail 1, friction will be generated between the clamping member 83 and the guide rail 1, and the friction will prevent the sliding member 82 from sliding on the guide rail 1; when the clamping member 83 is released, the above friction disappears, and the sliding member 82 can continue to slide.

[0074] Exemplarily, the clamping member 83 is a rail clamp.

[0075] Optionally, see Figure 1 and Figure 2The bracket 2 includes a base 22, and a plurality of limiting holes 221 are provided on the base 22. The plurality of limiting holes 221 correspond to the plurality of limiting members 5 one by one, and the limiting members 5 are movably arranged in the corresponding limiting holes 221. When it is necessary to limit the position of the steel cage 200 in the lowering space 21, the limiting member 5 is moved in the direction close to the steel cage 200 along the extension direction of the limiting hole 221, so that the limiting member 5 can be inserted into the steel cage 200; when it is necessary to release the limit of the steel cage 200, the limiting member 5 is moved in the direction away from the steel cage 200 along the extension direction of the limiting hole 221, so that the limiting member 5 can be separated from the steel cage 200. That is, the setting of the limiting hole 221 can not only constrain the moving direction of the limiting member 5, but also constrain the limiting member 5 on the base 22 after the limiting member 5 is separated from the steel cage 200, so as to avoid the loss of the limiting member 5 affecting the construction progress.

[0076] Exemplarily, the limiting member 5 is a plate body, the base 22 is a steel frame structure, a through hole is arranged at the center of the base 22, and the through hole is aligned with the lowering space 21 and the pile hole 100 up and down to avoid affecting the lowering of the steel cage 200; the limiting hole 221 is arranged on the side wall of the base 22 and extends in the horizontal direction; the sliding member 82 is arranged at the bottom of the base 22, and the sliding member 82 drives the entire bracket 2 to move along the guide rail 1 through the base 22.

[0077] Furthermore, a lifting ring is provided on the top surface of the base 22 so as to facilitate lifting the base 22 and moving the base 22 to the pile hole 100 when installing the steel cage lowering device.

[0078] Optionally, see Figure 1 and Figure 2 The support 2 includes a plurality of columns 23, which are arranged at intervals along the circumference of the pile hole 100. A plurality of connecting beams 24 are arranged between any two adjacent columns 23. The plurality of connecting beams 24 are arranged at intervals along the vertical direction. A plurality of diagonal braces (not shown in the figure) are arranged between any two adjacent connecting beams 24 along the vertical direction, and the diagonal braces are arranged obliquely along the vertical direction. The plurality of columns 23 and the plurality of connecting beams 24 are arranged to form a lowering space 21, and the hoisting assembly 3 is movably arranged on the connecting beams 24. The plurality of columns 23 and the plurality of connecting beams 24 form a frame structure, and the gravity of the steel cage 200 acting on the hoisting assembly 3 can be transmitted to the connecting beams 24, and then transmitted to the columns 23 through the connecting beams 24, and finally act on the base 22 through the columns 23, so that the support 2 has greater rigidity and can be used for the hoisting of a heavy steel cage 200. The diagonal braces can connect two adjacent connecting beams 24 to further increase the overall rigidity of the support 2 and improve the bearing capacity of the support 2.

[0079] Specifically, see Figure 1 and Figure 4The cross-sectional shape of the bracket 2 is rectangular, and there are four columns 23, which are arranged at the four corners of the rectangular bracket 2. Twelve connecting beams 24 are arranged, and three connecting beams 24 are arranged between any two adjacent columns 23. The three connecting beams 24 are respectively a top beam, a middle beam and a bottom beam. The top beam is arranged at the top of the corresponding column 23, and the middle beam and the bottom beam are both located between the top beam and the base 22, and the middle beam is located between the top beam and the bottom beam; two diagonal braces are arranged between any two adjacent connecting beams 24 in the vertical direction, and the two diagonal braces are arranged in an X shape. The X-shaped support provides additional support and rigidity for the frame-type bracket 2 through its unique cross arrangement, thereby improving the stability of the bracket 2.

[0080] Exemplarily, the top-layer beams and diagonal braces are both made of steel sections, the top-layer beams are welded to the top surface of the columns 23, and the diagonal braces are welded to two adjacent connecting beams 24; the columns 23, middle-layer beams and bottom-layer beams are all made of steel pipes, and the middle-layer beams and bottom-layer beams are connected to the columns 23 via flanges 25, which improves the speed at which the middle-layer beams and bottom-layer beams are connected to the columns 23 and speeds up the assembly speed of the bracket 2 at the construction site; the columns 23 are connected to the base 22 via flanges 25 to further improve the assembly speed of the bracket 2 at the construction site.

[0081] Further, see Figure 4 The steel cage lowering device also includes a ladder cage 91, which extends from the base 22 to the middle beam. A construction platform 92 is provided on the top of the ladder cage 91. The staff welds the main bars of the two steel cages 200 on the construction platform 92.

[0082] Further, see Figure 4 In order to ensure the safety of workers working on the construction platform 92, a safety guardrail 93 is provided at the construction platform 92.

[0083] The installation process of the reinforcement cage lowering device provided in this embodiment is as follows:

[0084] Determine the positions of multiple pile foundations to be constructed, and install the guide rail 1 on the ground according to the positions of the multiple pile foundations; install the base 22 on the guide rail 1, and move the base 22 to the first pile foundation to be constructed; install the column 23, the connecting beam 24 and the diagonal brace on the base 22 in sequence to form a bracket 2; then, install the fixed pulley 311 at the bottom of the top beam, install the lifting drive member 4 on the base 22, connect one end of the connecting rope 32 to the lifting drive member 4, and the other end is wound around a plurality of fixed pulleys 311 and a plurality of movable pulleys 312 and connected to the hook 33; install the width adjustment member 71 and the push member 72 in the lowering space 21; finally, debug the adaptability or integrity of each component, and after debugging is correct, the lowering operation of the steel cage 200 can be carried out.

[0085] Furthermore, before installing the column 23, the total height of the bracket 2 needs to be determined according to the length of each section of the steel cage 200 to be constructed, so that any section of the steel cage 200 can be completely located in the lowering space 21. Specifically, the column 23 includes a plurality of connected columns, and any two sections of the columns are connected by a flange 25. The total height of the column 23 can be adjusted by changing the number of columns, thereby achieving the adjustment of the height of the bracket 2.

[0086] Embodiment 2

[0087] like Figure 5 As shown, this embodiment provides a method for lowering a steel cage, using the steel cage lowering device of the first embodiment to lower the steel cage 200, comprising the following steps:

[0088] S1. Move the support 2 along the guide rail 1 to above the pile hole 100 corresponding to the steel cage 200 to be lowered.

[0089] Specifically, the clamping member 83 is switched to the active state, and the travel drive member 81 is controlled to drive the roller to rotate, and the roller drives the bracket 2 to move along the guide rail 1 until the bracket 2 moves to the top of the pile hole 100 corresponding to the steel cage 200 to be lowered, and the lowering space 21 is aligned with the pile hole 100 in the vertical direction; then the travel drive member 81 is controlled to stop driving, and the clamping member 83 is switched to the clamping state.

[0090] S2. Adjust the cross-sectional width of the lowering space 21 according to the specifications of the steel cage 200 to be lowered, and use a lifting device to lift the steel cage 200 to be lowered into the lowering space 21.

[0091] Specifically, the extension length of each width adjusting member 71 is adjusted according to the cross-sectional width of the steel cage 200 to be lowered, until the cross-sectional width of the lowering space 21 is the same as the cross-sectional width of the steel cage 200 to be lowered; then, the steel cage 200 to be lowered is lifted from the top of the bracket 2 to the lowering space 21 by means of lifting equipment, and the center of the steel cage 200 to be lowered is aligned with the center of the lowering space 21 to ensure that the push member 72 can contact the steel cage 200.

[0092] S3. Adjust the position of the hoisting assembly 3 according to the specifications of the steel cage 200 to be lowered, connect the hoisting assembly 3 to the steel cage 200 just hoisted into the lowering space 21, and separate the hoisting equipment from the steel cage 200 just hoisted into the lowering space 21.

[0093] Specifically, the positions of several fixed pulleys 311 are adjusted according to the specifications of the steel cage 200 to be lowered, so that the multiple hooks 33 can be connected to the steel cage 200 and ensure that the steel cage 200 does not tilt; after the multiple hooks 33 are connected to the steel cage 200 just hoisted into the lowering space 21, the lifting equipment is controlled to separate from the steel cage 200 just hoisted into the lowering space 21.

[0094] S4. Use the hoisting assembly 3 to move the steel cage 200 connected thereto downward to a preset position so that the top surface of the steel cage 200 is flush with the construction platform 92.

[0095] Specifically, multiple integrated control cabinets 6 are used to control the simultaneous rotation of the drums of multiple winches, multiple connecting ropes 32 are released at the same time, and multiple hooks 33 are moved downward at the same time. The multiple hooks 33 drive the steel cages 200 connected thereto to move downward until the top surface of the steel cages 200 is flush with the construction platform 92, so as to facilitate subsequent staff to connect the two steel cages 200 on the construction platform 92.

[0096] S5. Insert multiple limiting members 5 into the steel cage 200 located in the lowering space 21. At this time, the multiple sections of the steel cage 200 already located in the lowering space 21 can be fixed in the steel cage 200 by the limiting members 5 and will not move.

[0097] S6. Adjust the cross-sectional width of the lowering space 21 according to the cross-sectional width of the next steel cage section 200 to be lowered, and use the lifting equipment to lift the next steel cage section 200 into the lowering space 21.

[0098] S7, connecting the next section of the steel cage 200 to the steel cage 200 located at the preset position.

[0099] Specifically, the staff climbs up to the construction platform 92 through the ladder cage 91, and welds the main reinforcement of the next section of the steel cage 200 to the steel cage 200 located at the preset position on the construction platform 92, thereby completing the connection between the next section of the steel cage 200 and the steel cage 200 located at the preset position.

[0100] S8. Repeat steps S3 to S7 until the multiple sections of the steel cage 200 are lowered into the corresponding pile holes 100, thus completing the installation of the steel cage 200 in one pile hole 100.

[0101] S9, switch the clamping member 83 to the active state, and control the travel drive member 81 to drive the roller to rotate, and the bracket 2 moves along the guide rail 1 until the bracket 2 moves to the next pile hole 100 to be constructed; then, close the travel drive member 81, and switch the clamping member 83 to the clamping state, and the bracket 2 is limited to the next pile hole 100 to be constructed.

[0102] S10, repeating steps S2 to S9 until all the steel cages 200 in the pile holes 100 are lowered.

[0103] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. 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 claims of the present invention.

Claims

1. A steel cage lowering device, wherein a plurality of pile holes (100) are arranged at intervals along the extension direction of a bridge, and the steel cage lowering device is used to hoist a plurality of steel cage sections (200) into the corresponding pile holes (100), characterized in that: The steel cage lowering device comprises: A plurality of guide rails (1) can be symmetrically installed on both sides of a plurality of pile holes (100) and all extend along the extension direction of the bridge; A bracket (2) is movably arranged on a plurality of the guide rails (1) along the extension direction of the guide rails (1), and the bracket (2) can be limited to be located above any of the pile holes (100). The bracket (2) is provided with a lowering space (21) with an adjustable cross-sectional width. When the bracket (2) is located above the pile hole (100), the lowering space (21) can be aligned with the corresponding pile hole (100) in the upper and lower directions, and the steel cage (200) can enter the corresponding pile hole (100) through the lowering space (21); A hoisting assembly (3) and a hoisting drive member (4), wherein the hoisting assembly (3) is movably arranged on the support (2) and can be connected to the steel cage (200), and the hoisting drive member (4) is arranged on the support (2), and an output end of the hoisting drive member (4) is connected to the hoisting assembly (3) and is used to drive the hoisting assembly (3) to drive the steel cage (200) to move downward; A plurality of limiting members (5) are arranged at intervals along the circumference of the support (2); the limiting members (5) are movably arranged on the support (2); and the limiting members (5) can be inserted into the steel cage (200) located in the lowering space (21).

2. The steel cage lowering device according to claim 1 is characterized in that: The lifting assembly (3) comprises a pulley block (31), a connecting rope (32) and a hook (33); the pulley block (31) is movably arranged on the top of the bracket (2); one end of the connecting rope (32) is connected to the lifting drive component (4); the other end is wound around the pulley block (31) and connected to the hook (33); the hook (33) can be connected to the steel cage (200); and the lifting drive component (4) is used to drive the connecting rope (32) to drive the hook (33) to move.

3. The steel cage lowering device according to claim 2 is characterized in that: The pulley block (31) comprises a plurality of fixed pulleys (311) and a plurality of movable pulleys (312); the fixed pulleys (311) are movably arranged at the top of the bracket (2) along the width direction of the lowering space (21); the other end of the connecting rope (32) is wound around the plurality of movable pulleys (312) and the plurality of fixed pulleys (311) and is connected to the hook (33).

4. The steel cage lowering device according to claim 1 is characterized in that: The steel cage lowering device further comprises a width adjusting member (71) and a push member (72) located in the lowering space (21); one end of the width adjusting member (71) is connected to the bracket (2), and the other end is connected to the push member (72); and the length of the width adjusting member (71) along the width direction of the lowering space (21) is adjustable; when the length of the width adjusting member (71) changes, the width adjusting member (71) can drive the push member (72) to move, so that the push member (72) contacts the steel cage (200) located in the lowering space (21).

5. The steel cage lowering device according to claim 4 is characterized in that: The width adjusting member (71) is provided with a locking member, and the locking member has a locking state for limiting the extension length of the width adjusting member (71) and an unlocking state for releasing the restriction on the extension length of the width adjusting member (71). In the locking state, the push member (72) can contact the steel cage (200) located in the lowering space (21); in the unlocking state, the extension length of the width adjusting member (71) is adjustable.

6. The steel cage lowering device according to claim 1, characterized in that: A travel drive member (81) and a sliding member (82) are provided at the bottom of the bracket (2); the sliding member (82) is slidably matched with the guide rail (1); the output end of the travel drive member (81) is connected to the sliding member (82) for driving the sliding member (82) to slide along the guide rail (1).

7. The steel cage lowering device according to claim 6 is characterized in that: The sliding member (82) is provided with a clamping member (83), and the clamping member (83) has a clamping state for clamping the guide rail (1) and an active state for releasing the guide rail (1). In the clamping state, the sliding member (82) is limited to be located above the pile hole (100), and in the active state, the sliding member (82) can slide along the guide rail (1).

8. The reinforcement cage lowering device according to any one of claims 1 to 7, characterized in that: The bracket (2) comprises a base (22), and a plurality of limiting holes (221) are arranged on the base (22). The plurality of limiting holes (221) correspond one-to-one to the plurality of limiting members (5), and the limiting members (5) are movably inserted into the corresponding limiting holes (221).

9. The reinforcement cage lowering device according to any one of claims 1 to 7, characterized in that: The support (2) comprises a plurality of columns (23), the plurality of columns (23) are arranged at intervals along the circumference of the pile hole (100), a plurality of connecting beams (24) are arranged between any two adjacent columns (23), a plurality of connecting beams (24) are arranged at intervals along the vertical direction, a plurality of diagonal bracing members are arranged between any two adjacent connecting beams (24) along the vertical direction, and the diagonal bracing members are arranged obliquely along the vertical direction, the plurality of columns (23) and the plurality of connecting beams (24) are arranged to enclose the lowering space (21), and the hoisting assembly (3) is movably arranged on the connecting beams (24).

10. A method for lowering a steel cage, characterized in that: Lowering the steel cage (200) using the steel cage lowering device according to any one of claims 1 to 9 comprises the following steps: S1, moving the support (2) along the guide rail (1) to above the pile hole (100) corresponding to the steel cage (200) to be lowered; S2, adjusting the cross-sectional width of the lowering space (21) according to the specifications of the steel cage (200) to be lowered, and hoisting the steel cage (200) to be lowered into the lowering space (21) using hoisting equipment; S3, adjusting the position of the hoisting assembly (3) according to the specifications of the steel cage (200) to be lowered, connecting the hoisting assembly (3) to the steel cage (200) just hoisted into the lowering space (21), and separating the hoisting equipment from the steel cage (200) just hoisted into the lowering space (21); S4, using the hoisting assembly (3) to move the steel cage (200) connected thereto downward to a preset position; S5, inserting a plurality of the limiting members (5) into the steel cage (200) located in the lowering space (21); S6, adjusting the cross-sectional width of the lowering space (21) according to the cross-sectional width of the next section of the steel cage (200) to be lowered, and using the lifting equipment to lift the next section of the steel cage (200) into the lowering space (21); S7, connecting the next section of the steel cage (200) to the steel cage (200) located at the preset position; S8, repeating steps S3 to S7 until the multiple sections of the steel cage (200) are lowered into the corresponding pile holes (100).

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