A hoisting device and a method for removing and lowering concrete support blocks in a foundation pit

Abstract

This invention discloses a hoisting device and a method for dismantling and lowering concrete support blocks in a foundation pit. The hoisting device includes a frame; a traveling mechanism mounted on the frame for driving the frame to move; and a hoisting mechanism including a load-bearing component for carrying the concrete support block; and a lifting component mounted on the frame and connected to the load-bearing component, wherein the lifting component drives the load-bearing component to lift the concrete support block. This invention ensures safety, speed, and convenience during the cutting and hoisting / lowering of the concrete support block. The device has a simple structure and is easy to construct.

Description

Technical Field

[0001] This invention belongs to the field of construction technology in foundation pits, and more specifically, relates to a hoisting device and a method for dismantling and lowering concrete support blocks in foundation pits. Background Technology

[0002] With the continuous development and application of urban underground space in my country, more and more civil engineering projects are concentrated in densely populated urban areas. Construction risks are high in such environments, especially during the excavation of deep foundation pits, which can easily impact surrounding buildings and structures. Furthermore, the construction process is prone to slope instability. Currently, the conventional approach is to first construct the retaining structure during the initial excavation, followed by the construction of concrete supports to form a closed system. Then, the earthwork is excavated, and the next support is constructed according to the foundation pit design. This process is repeated until the foundation pit is bottomed out. After the bottom is reached, the base slab is constructed, followed by the construction of the sidewall structure. At this point, a problem arises: the internal supports need to be removed before the next layer of the main structure can be constructed. Under normal circumstances, the removal of the concrete supports involves using scaffolds or stirrups to support the bottom of the supports, then cutting them with ropes, and finally using a truck crane to lift the removed concrete supports to the ground. This approach is feasible when construction is carried out in areas with no support above the concrete support and when the concrete support structure is relatively small. However, when the concrete support is large, the safety requirements for the support frame become higher. Furthermore, if there is no space for erecting the support frame below, there are difficulties in erecting it and a risk of instability. Additionally, when hoisting the removed concrete support upwards, if the vertical alignment is affected, there is a risk that the concrete support may collide with the upper closed support system during hoisting. Traditional concrete support hoisting equipment is inadequate for handling such situations, thus impacting the removal and hoisting of the concrete support and subsequent main structure construction. Therefore, a new type of concrete support hoisting device is urgently needed to facilitate the smooth lowering and external hoisting of the concrete support, minimizing the impact on the upper support system and ultimately ensuring the smooth construction of the subsequent main structure.

[0003] Currently, the common practice for dismantling concrete supports is to use brackets or stirrups at the bottom of the support for support, then cut it with ropes, and finally use a truck crane to lift the completely removed concrete support to the ground. However, this method has a relatively small impact when dealing with small-section concrete supports or when there is no impact zone above the vertical section of the concrete support to be lifted. When encountering large-section concrete supports or when there is an impact zone above the support to be lifted vertically, it is very easy to affect the stability of the lower support of the concrete support to be cut, and the vertical lifting of the support can easily cause some impact on the upper closed concrete support system. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a hoisting device and a method for dismantling and lowering concrete support blocks in a foundation pit, thereby resolving the issue of the cumbersome process of dismantling concrete supports.

[0005] The present invention adopts the following technical solution:

[0006] A hoisting device for transporting concrete support blocks in a foundation pit, comprising:

[0007] frame;

[0008] A traveling mechanism, located on the frame, is used to drive the frame to move;

[0009] Lifting mechanism, including:

[0010] Load-bearing components are used to support concrete support blocks;

[0011] A lifting assembly is mounted on the frame and connected to the load-bearing assembly. The lifting assembly drives the load-bearing assembly to lift the concrete support block.

[0012] Furthermore, the lifting assembly includes:

[0013] A drive unit is mounted on the frame, and the drive shaft of the drive unit is connected to a guide wheel;

[0014] Stranded wire is wound around the guide wheel and connected to the load-bearing assembly;

[0015] The drive unit drives the guide wheel to rotate in order to retract or release the stranded wire in order to drive the lifting and lowering of the load-bearing assembly.

[0016] Furthermore, the driving component is a dual-axis motor, with its two drive shafts respectively connected to guide wheels and stranded wires. The lifting assembly also includes:

[0017] Four cantilever cranes are mounted on the frame, with every two cantilever cranes arranged opposite each other and on the same plane as the guide wheel. The ends of the two oppositely arranged cantilever cranes extend from opposite sides of the frame.

[0018] Four fixed pulleys are respectively installed at the end of the cantilever crane;

[0019] The stranded wire is wound around the guide wheel in the middle, and its two ends pass over the corresponding fixed pulleys and are connected to the bearing assembly.

[0020] Furthermore, the lifting assembly also includes:

[0021] A lifting ring is provided on the frame, and the stranded wire passes through the lifting ring;

[0022] A limit switch is provided on the cantilever crane, and the stranded wire passes through the limit switch.

[0023] Furthermore, the carrier component includes:

[0024] The bearing plate is used to support the concrete support blocks;

[0025] A lifting ring, located on the support plate, is used to connect the lifting assembly;

[0026] Casters are provided at the bottom of the support plate;

[0027] A push rod is provided on the support plate for moving the support plate.

[0028] Furthermore, the walking mechanism includes:

[0029] A track assembly is mounted on the frame and drives the frame to move via tracks;

[0030] Two limiting plates are respectively disposed on opposite sides of the frame and extend from the bottom of the frame. The limiting plates are used to limit the frame.

[0031] Furthermore, the hoisting device also includes:

[0032] Control mechanisms, including:

[0033] An electrical control assembly, located on the frame, is used to control the operation of the hoisting device;

[0034] The remote control device is signal-connected to the electronic control component and sends commands to the electronic control component.

[0035] Furthermore, the hoisting device also includes:

[0036] Monitoring agencies include:

[0037] The camera is mounted on the frame;

[0038] A level is provided on the supporting component;

[0039] The monitoring mechanism is connected to the remote control device to send monitoring images and level status.

[0040] Furthermore, the hoisting device also includes:

[0041] The power mechanism includes:

[0042] Power components, used to connect to an external power supply line for power supply;

[0043] Fuel assembly, which provides energy by burning fuel in its fuel tank;

[0044] The power component and the fuel component can be switched between each other.

[0045] A method for removing and lowering concrete support blocks in an excavation pit includes the following steps:

[0046] A hoisting device for hoisting concrete support blocks in a foundation pit is used to hoist the concrete support blocks to the top of a concrete beam, with two limiting plates located on both sides of the concrete beam.

[0047] The stranded wire is lowered using the drive mechanism and fixed to the lifting ring on the support plate. The stranded wire is then adjusted according to the feedback data from the level to perform the leveling operation.

[0048] The stranded wire is retracted by the drive component to raise the load-bearing assembly, so that the load-bearing plate supports the lower part of the concrete support block to be cut;

[0049] Cutting concrete support blocks;

[0050] The stranded wire is released by the drive mechanism, allowing the load-bearing component and concrete support block to descend to the bottom surface;

[0051] Disconnect the stranded wire from the lifting ring on the bearing plate and move the bearing plate and concrete support block by pushing with a hand lever.

[0052] Beneficial effects

[0053] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0054] (1) The concrete support block is lifted by the hoisting device. This device is the first of its kind to be used for lifting and lowering concrete support in the foundation pit. It addresses the technical challenges of supporting large-section concrete support blocks and the limited space for upper hoisting. The use of this device can ensure the safety of the concrete support block during the supporting, lowering and hoisting process, and has great technical foresight.

[0055] (2) The use of this device can ensure the convenience and safety of its movement on the concrete support, as well as the safety of the support during the cutting process of the concrete support block and the safety of the lowering process after the concrete support block is cut.

[0056] (3) The device uses two types of power. When it is close to the edge of the foundation pit structure, it uses an external power supply cable for power supply. When it moves in the middle of the large-section foundation pit, cuts concrete supports and lifts it, it can use fuel power supply to ensure that the device operates normally during use.

[0057] (4) The device uses a remote control device to remotely control the device and at the same time monitors various adverse situations during the construction process through a monitoring agency so as to take measures to ensure the safety of the construction process.

[0058] (5) This device is a self-propelled portable auxiliary device for dismantling and lowering supports in foundation pits. It is not only easy to operate and safe to use, but also reusable. More importantly, it is very convenient to assemble, debug, and disassemble. Therefore, this device has significant practical value compared to traditional concrete beam hoisting devices. Attached Figure Description

[0059] Figure 1 This is a perspective view of the hoisting device according to an embodiment of the present invention;

[0060] Figure 2 for Figure 1 A partial schematic diagram of the hoisting device shown;

[0061] Figure 3 for Figure 1 A three-dimensional schematic diagram of the hoisting device from another angle;

[0062] Figure 4 A three-dimensional schematic diagram of the load-bearing components of the hoisting device;

[0063] Figure 5 for Figure 4 A three-dimensional schematic diagram of the supporting component from another angle;

[0064] Figure 6 This is a three-dimensional schematic diagram of the hoisting device in operation.

[0065] Figure 7 This is a three-dimensional schematic diagram of the hoisting device in its working state from another angle;

[0066] Figure 1-3 The hoisting device shown only includes the upper frame and other components; the load-bearing components are not shown.

[0067] In the picture:

[0068] 1-Stranded wire, 2-Frame, 3-Lifting ring, 4-Fixed pulley, 5-Limit plate, 6-Interface, 7-Crawler, 8-Oil tank, 9-Tail support rod, 10-Camera, 11-Warning light, 12-Cantilever crane, 13-Limiter, 14-Drive component, 15-Push rod, 16-Lifting ring, 17-Bearing plate, 18-Wheel caster, 19-Level, 20-Remote control device, 21-Concrete beam. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] Please see Figure 1-7This invention provides a hoisting device for transporting concrete support blocks in a foundation pit, comprising a frame 2, a traveling mechanism, and a hoisting mechanism. The traveling mechanism is mounted on the frame 2 and is used to drive the frame 2 to move. The hoisting mechanism is mounted on the frame 2 and is used to hoist and support the concrete support blocks.

[0071] Furthermore, the hoisting device also includes a control mechanism, a monitoring mechanism, and a power mechanism. The control mechanism is electrically connected to the traveling mechanism and the hoisting mechanism to control their operation. The monitoring mechanism is used to monitor the status of the hoisting device. The power mechanism is used to provide power to the hoisting device.

[0072] Lifting mechanism, including:

[0073] Load-bearing components are used to support concrete support blocks;

[0074] A lifting assembly is provided on the frame 2 and connected to the bearing assembly. The lifting assembly drives the bearing assembly to lift the concrete support block.

[0075] Furthermore, the lifting assembly includes:

[0076] A drive component 14 is disposed on the frame 2, and the drive shaft of the drive component 14 is connected to a guide wheel;

[0077] Stranded wire 1 is wound around the guide wheel and connected to the load-bearing assembly;

[0078] The drive unit 14 drives the guide wheel to rotate to retract or release the stranded wire 1 to drive the lifting and lowering of the load-bearing assembly.

[0079] Preferably, the drive shaft is located on the central axis of the frame 2; preferably, the stranded wire 1 is a steel strand.

[0080] Furthermore, the driving component 14 is a dual-axis motor, with its two drive shafts respectively connected to the guide wheel and the stranded wire 1. The lifting assembly also includes:

[0081] Four cantilever cranes 12 are mounted on the frame 2. Every two cantilever cranes 12 are arranged opposite each other and are located on the same plane as the guide wheel. The ends of the two oppositely arranged cantilever cranes 12 extend from opposite sides of the frame 2.

[0082] Four fixed pulleys 4 are respectively installed at the ends of the cantilever crane 12;

[0083] The stranded wire 1 is wound around the guide wheel in the middle, and its two ends pass over the corresponding fixed pulleys 4 and are connected to the bearing assembly.

[0084] The cantilever crane 12 is roughly L-shaped, with one end fixed to the frame 2 and the other end extending out of the frame 2 so that the stranded wire can be separated from the frame.

[0085] Furthermore, the lifting assembly also includes:

[0086] A lifting ring 3 is provided on the frame 2, and the stranded wire 1 passes through the lifting ring 3;

[0087] A limiter 13 is provided on the cantilever crane 12, and the stranded wire 1 passes through the limiter 13.

[0088] Furthermore, the carrier component includes:

[0089] Support plate 17 is used to support the concrete support block;

[0090] A lifting ring 16 is provided on the support plate 17 and is used to connect the lifting assembly;

[0091] The caster wheel 18 is located at the bottom of the support plate 17;

[0092] A push rod 15 is provided on the support plate 17 and is used to move the support plate 17.

[0093] In the illustrated embodiment, there are four lifting rings 16, symmetrically arranged around the center of gravity of the support plate 17. The four lifting rings 16 correspond to the four ends of the two stranded wires 1.

[0094] In the illustrated embodiment, there are two push rods 15, which are located on opposite sides of the support plate 17.

[0095] In the illustrated embodiment, there are four casters 18, which are respectively set at the four corners of the bottom of the support plate 17 to facilitate movement after the concrete support block is placed on the ground.

[0096] Furthermore, the walking mechanism includes:

[0097] The track assembly is located on the frame 2 and moves the frame 2 via the track 7;

[0098] Two limiting plates 5 are respectively disposed on opposite sides of the frame 2 and extend from the bottom of the frame 2. The limiting plates 5 are used to limit the frame 2.

[0099] The track 7 components can adopt a universal design, which will not be described in detail here.

[0100] Furthermore, the hoisting device also includes:

[0101] Control mechanisms, including:

[0102] An electrical control component, located on the frame 2, is used to control the operation of the hoisting device;

[0103] The remote control device 20 is connected to the electronic control component via a signal connection and sends commands to the electronic control component.

[0104] Furthermore, the hoisting device also includes:

[0105] Monitoring agencies include:

[0106] Camera 10 is mounted on the frame 2;

[0107] Level 19 is provided on the bearing assembly;

[0108] The monitoring mechanism is connected to the remote control device 20 to send monitoring images and the status of the level 19.

[0109] In the illustrated embodiment, there are four cameras 10, located at the four corners of the frame 2, but this is not the only embodiment. In other embodiments, the number and position of the cameras 10 can be changed as needed.

[0110] Furthermore, the hoisting device also includes:

[0111] The power mechanism includes:

[0112] Power components, used to connect to an external power supply line for power supply;

[0113] The fuel assembly provides energy by burning fuel in its fuel tank 8;

[0114] The power component and the fuel component can be switched between each other.

[0115] The power assembly has an interface 6 on the side of the rack 2 for connecting to an external power source.

[0116] Fuel components include:

[0117] Tail support rod 9 is welded to frame 2 to form a whole;

[0118] Fuel tank 8, located on tail support rod 9, is used to hold fuel.

[0119] When the device is close to the edge of the foundation pit structure, an external power supply cable is used for power supply. When moving in the middle of a large-section foundation pit, cutting concrete supports, or hoisting, fuel power can be used to ensure the normal operation of the device during use.

[0120] A method for removing and lowering concrete support blocks in an excavation pit includes the following steps:

[0121] A hoisting device for hoisting concrete support blocks in a foundation pit is hoisted to the upper part of the concrete beam 21, with two limiting plates 5 located on both sides of the concrete beam 21.

[0122] The stranded wire 1 is lowered by the drive unit 14 and fixed to the lifting ring 16 on the support plate 17. The stranded wire 1 is adjusted according to the feedback data of the level 19 to perform the leveling operation.

[0123] The stranded wire 1 is retracted by the drive component 14 to raise the bearing assembly, so that the bearing plate 17 supports the lower part of the concrete support block to be cut;

[0124] Cutting concrete support blocks;

[0125] The stranded wire 1 is released by the drive component 14, causing the load-bearing component and the concrete support block to descend to the bottom surface;

[0126] Disconnect the connection between the stranded wire 1 and the lifting ring 16 on the bearing plate 17, and move the bearing plate 17 and the concrete support block by pushing the lever 15.

[0127] After the concrete support blocks are moved to an open area, they are lifted to the ground using ground lifting equipment.

[0128] In the illustrated embodiment, a warning light 11 is provided on the frame 2. The warning light 11 is arranged at the front and rear ends of the top of the frame 2.

[0129] The examples described herein are merely preferred embodiments of the invention and are not intended to limit the concept and scope of the invention. Any modifications and improvements made by those skilled in the art to the technical solutions of the invention without departing from the design concept of the invention should fall within the protection scope of the invention.

Claims

1. A hoisting device for transporting concrete support blocks within a foundation pit, comprising: frame; Its characteristic is that it further includes: A traveling mechanism, located on the frame, is used to drive the frame to move; Lifting mechanism, including: Load-bearing components are used to support concrete support blocks; A lifting assembly is mounted on the frame and connected to the load-bearing assembly. The lifting assembly drives the load-bearing assembly to lift the concrete support block. The lifting assembly includes: A drive unit is mounted on the frame, and the drive shaft of the drive unit is connected to a guide wheel; Stranded wire is wound around the guide wheel and connected to the load-bearing assembly; The drive unit drives the guide wheel to rotate to retract or release the stranded wire in order to drive the load-bearing assembly to rise and fall. The driving component is a dual-axis motor, whose two drive shafts are respectively connected to guide wheels and stranded wires. The lifting assembly also includes: Four cantilever cranes are mounted on the frame, with every two cantilever cranes arranged opposite each other and on the same plane as the guide wheel. The ends of the two oppositely arranged cantilever cranes extend from opposite sides of the frame. Four fixed pulleys are respectively installed at the end of the cantilever crane; The stranded wire is wound around the guide wheel in the middle, and its two ends pass over the corresponding fixed pulleys and are connected to the bearing assembly. The lifting assembly also includes: A lifting ring is provided on the frame, and the stranded wire passes through the lifting ring; A limit switch is provided on the cantilever crane, and the stranded wire passes through the limit switch; The carrier component includes: The bearing plate is used to support the concrete support blocks; A lifting ring, located on the support plate, is used to connect the lifting assembly; Casters are provided at the bottom of the support plate; A push rod, located on the support plate, is used to move the support plate; The walking mechanism includes: A track assembly is mounted on the frame and drives the frame to move via tracks; Two limiting plates are respectively disposed on opposite sides of the frame and extend from the bottom of the frame. The limiting plates are used to limit the frame.

2. The hoisting device for hoisting concrete support blocks in a foundation pit according to claim 1, characterized in that, The hoisting device further includes: Control mechanisms, including: An electrical control assembly, located on the frame, is used to control the operation of the hoisting device; The remote control device is signal-connected to the electronic control component and sends commands to the electronic control component.

3. A hoisting device for transporting concrete support blocks in a foundation pit according to claim 2, characterized in that, The hoisting device also includes: Monitoring agencies include: The camera is mounted on the frame; A level is provided on the supporting component; The monitoring mechanism is connected to the remote control device to send monitoring images and level status.

4. A hoisting device for hoisting concrete support blocks in a foundation pit according to claim 1, characterized in that, The hoisting device also includes: The power mechanism includes: Power components, used to connect to an external power supply line for power supply; Fuel assembly, which provides energy by burning fuel in its fuel tank; The power component and the fuel component can be switched between each other.

5. A method for removing and lowering concrete support blocks in a foundation pit, characterized in that, Including the following steps: The hoisting device for hoisting concrete support blocks in the foundation pit as described in claim 1 is hoisted to the upper part of the concrete beam, with two limiting plates located on both sides of the concrete beam; The stranded wire is lowered by the drive unit and fixed to the lifting ring on the support plate. The stranded wire is adjusted according to the feedback data of the level to perform the leveling operation. The stranded wire is retracted by the drive component to raise the load-bearing assembly, so that the load-bearing plate supports the lower part of the concrete support block to be cut; Cutting concrete support blocks; The stranded wire is released by the drive mechanism, allowing the load-bearing component and concrete support block to descend to the bottom surface; Disconnect the stranded wire from the lifting ring on the bearing plate and move the bearing plate and concrete support block by pushing with a hand lever.

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