Deep foundation pit support multi-wire-harness steel strand installation device and construction method

Abstract

The invention discloses a deep foundation pit support multi-harness steel strand installation device and construction method, the device comprises a steel strand channel and an operation hole formed in one end of the steel strand channel, and the steel strand channel is formed in the bottom end of a triangular piece; a conveying unit and a guide rail are arranged in the steel strand channel, the conveying unit is arranged at the bottom end of the steel strand channel, the guide rail is arranged at the top end of the steel strand channel, a steel strand clamp is arranged between the conveying unit and the guide rail, a plurality of through holes are formed in the steel strand clamp, and one end of each steel strand is fixed in the through hole in the steel strand clamp; the two ends of the steel strand clamp are connected into the conveying unit and the guide rail respectively, the steel strand clamp is driven by the conveying unit to move back and forth along the guide rail, the conveying unit drives the steel strand clamp so that the end of the steel strand can be conveyed from one end of the steel strand channel to the other end of the steel strand channel, and then the steel strand is fixed to the anchoring part through operation in the operation hole. A plurality of steel strands can penetrate into the steel strand penetrating device at the same time, mutual friction among the steel strands is reduced, and damage is avoided.

Description

Technical Field

[0001] This invention belongs to the field of foundation pit protection technology, and more specifically, relates to a multi-strand steel strand installation device and construction method for deep foundation pit support. Background Technology

[0002] In deep foundation pit support engineering, the crescent beam, as a core supporting component, mainly works with the waler beam and anchoring components to form a closed support system. This system resists active earth pressure from the outside of the foundation pit, providing a safe construction space for excavation operations and is one of the key structures ensuring the stability of deep foundation pit construction. The steel strand, as the core carrier for transmitting prestress in the crescent beam support system, directly determines the support strength of the crescent beam and the overall safety of the foundation pit support through its threading construction quality. It is widely used in various deep foundation pits, large building foundation pits, and other engineering scenarios requiring high-strength support, and is especially suitable for deep foundation pit support operations with deep excavation and complex surrounding environments. It is a necessary construction link connecting the crescent beam and the anchoring structure to achieve prestress transfer.

[0003] Currently, the crescent beam steel strand threading construction in traditional deep foundation pit support engineering has not yet formed a mature automated operation mode, mainly relying on manual single-strand operation to complete the entire threading process. During construction, multiple workers need to work together to first straighten each steel strand, and then manually push each steel strand slowly into the pre-set threading channel of the crescent beam. In some scenarios, even with the assistance of simple traction tools, the direction and speed of the steel strand's advancement still need to be manually controlled throughout the process. The threading process relies entirely on the operator's experience, without the use of specialized automatic conveying and guiding equipment. The overall construction process is relatively crude, and it mainly focuses on single-strand threading, making it difficult to achieve simultaneous threading of multiple strands.

[0004] The aforementioned traditional manual single-strand threading method has many prominent problems, severely restricting construction efficiency and support safety. On the one hand, the construction efficiency is extremely low. Threading a single strand requires the coordinated efforts of multiple personnel, resulting in high labor costs and slow progress, failing to meet the high-efficiency construction requirements of deep foundation pit projects and easily delaying the overall construction period. On the other hand, safety is difficult to guarantee. During threading and subsequent tensioning, due to the lack of a dedicated guiding structure, the steel strands are in direct contact with the sidewalls of the threading channel, generating severe friction. Long-term friction or the instantaneous force during tensioning can easily cause surface damage or even breakage of the steel strands, thus affecting the prestress transfer effect of the steel strands, reducing the support capacity of the crescent beam, and posing safety hazards to the foundation pit support structure. In severe cases, it may lead to foundation pit collapse and other safety accidents, failing to meet the dual requirements of construction safety and efficiency for deep foundation pit support projects. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a multi-strand steel strand installation device and construction method for deep foundation pit support. By fixing multiple strands of steel strands into through holes on a steel strand clamp, friction between the strands during tensioning is avoided, thus protecting the strands from damage. Then, a conveying unit drives the steel strand clamp to transport the ends of the strands from one end of the steel strand channel to the other. Finally, the strands are fixed to anchors through operating holes, completing the overall tensioning of the steel strands and achieving installation. When using this device to install steel strands, multiple strands can be inserted simultaneously, improving work efficiency and reducing mutual friction between strands, preventing damage.

[0006] To achieve the above objectives, according to a first aspect of the present invention, a multi-strand steel strand installation device for deep foundation pit support is provided, comprising: a steel strand channel and an operating hole provided at one end of the steel strand channel, wherein the steel strand channel is located at the bottom end of a triangular member; The steel strand channel is equipped with a conveying unit and a guide rail inside. The conveying unit is located at the bottom end of the steel strand channel, and the guide rail is located at the top end of the steel strand channel. A steel strand clamp is provided between the conveying unit and the guide rail. The steel strand clamp has multiple through holes, and one end of the steel strand is fixed in the through hole of the steel strand clamp. The two ends of the steel strand clamp are respectively connected to the conveying unit and the guide rail. Driven by the conveying unit, it moves back and forth along the guide rail. The steel strand clamp is driven by the conveying unit to transport the end of the steel strand from one end of the steel strand channel to the other end. Then, the steel strand is fixed to the anchor in the operating hole to complete the installation of the steel strand.

[0007] Furthermore, the steel strand channel is also provided with a guide shaft, which is arranged parallel to the steel strand clamp. It has rotating disks at both ends, and the rotating disks at both ends are fixed to the top and bottom ends of the steel strand channel, so that the guide shaft can rotate axially along its central axis between the rotating disks at both ends. The steel strand is fixed to the steel strand clamp after passing over the guide shaft.

[0008] Furthermore, the operating hole is located at one end of the steel strand channel and is connected to the steel strand channel. After the end of the steel strand is transported to one end of the operating hole of the steel strand channel, the steel strand is fixed to the anchor by operating within the operating hole.

[0009] Furthermore, the bottom side of the guide rail is provided with a guide rail groove along its length, and both ends of the guide rail are provided with guide rail bolt holes. The guide rail is fixed in the steel strand channel by bolts passing through the guide rail bolt holes.

[0010] Furthermore, the steel strand clamp has a clamping piece in the through hole to clamp the steel strand, and the top of the steel strand clamp has a guide wheel, which is located in the guide groove and rolls in the guide groove.

[0011] Furthermore, a connecting plate is fixedly connected to the bottom end of the steel strand clamp, the connecting plate extends to one side, and a connecting hole is opened on the extended connecting plate. The sliding support is also provided with support bolt holes. The connecting plate is fixed to the sliding bracket by bolts passing through the connecting holes. After passing through the connecting holes, the bolts are tightened into the bolt holes of the bracket.

[0012] Furthermore, the transmission unit includes a transmission base and a power system disposed on the transmission base. The bottom of the transmission base is a long strip plate with semi-circular arc plates at both ends. The periphery of the bottom plate is provided with an upper edge, and a guide groove is provided in the upper edge. The power system consists of drive wheels located at both ends of the transmission base. Rotating components are mounted on the drive wheels. The power system drives the rotating components to rotate. Conveyor belts are mounted on the rotating components at both ends. A sliding support is fixed on the conveyor belt. The sliding support moves synchronously with the conveyor belt. The sliding support has protrusions on both sides. One protrusion is fixedly connected to the conveyor belt, and the other protrusion is located in the guide groove and slides along the guide groove.

[0013] Furthermore, a slide rail is formed between the outer edge of the transmission base and the conveyor belt, and the sliding support is disposed in the slide rail. When the power system drives the rotating component to rotate, it drives the conveyor belt to rotate, thereby causing the sliding support to slide back and forth in the slide rail.

[0014] Furthermore, the conveyor belt moves around the two rotating components, and a straight slide is formed between its two sides and the outer edge of the transmission base. Sliding supports are provided in the slides on both sides. The steel strand clamp can be installed on one of the two sliding supports for individual use or installed on both sliding supports for simultaneous use.

[0015] According to a second aspect of the present invention, a construction method for a multi-strand steel strand installation device for deep foundation pit support is provided, comprising the following steps: S100. Fix the steel strand channel to the preset position at the bottom of the crescent beam triangular piece, ensuring that the installation is firm, the axis is horizontal, and that the operating hole is fixed to the steel strand channel for connection. S200. Fix the guide rail to the top of the steel strand channel, tighten it with bolts through the guide rail bolt holes, and ensure that the guide rail groove is flat and without jamming. Install the guide shaft parallel to the steel strand clamp, and fix the rotating discs at both ends to the top and bottom of the steel strand channel. Adjust until the rotation is smooth. S300: Install the power system, rotating components, and conveyor belt onto the transmission base, fix the sliding bracket and adjust it to move smoothly, then fix the transmission base to the bottom of the steel strand channel with bolts and put on shims to enhance stability. S400: Install the steel strand clamp between the conveying unit and the guide rail. The guide wheel is embedded in the guide rail groove. The bottom connecting plate is fixed to the sliding support by bolts. Multiple bundles of steel strands are wrapped around the guide shaft, passed through the through hole of the steel strand clamp, and clamped by the clamping pieces to ensure that there is no loosening or contact. S500: Start the power system to move the conveyor belt, sliding support and steel strand clamp, so that the steel strand is transported along the steel strand channel to one end of the operating hole. Turn off the power system and fix the steel strand to the anchor in the operating hole to complete the tensioning installation. S600: Loosen the clamps, remove the steel strand clamps and conveyor unit, clean and inspect the components, and then transport it to the next crescent beam for reuse.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. The steel strand installation device of the present invention fixes multiple bundles of steel strands into through holes on a steel strand clamp to avoid friction between the bundles of steel strands during tensioning, thereby protecting the steel strands from damage. Then, a conveying unit drives the steel strand clamp to transport the ends of the steel strands from one end of the steel strand channel to the other. Finally, the steel strands are fixed to anchors through operating holes to complete the overall tensioning of the steel strands and achieve installation. When using this device to install steel strands, multiple steel strands can be inserted simultaneously, improving work efficiency and reducing mutual friction between multiple steel strands, thus avoiding damage.

[0017] 2. The steel strand installation device of the present invention has a compact and reasonable overall structure, integrating the steel strand channel, conveying unit, guide rail, guide shaft and steel strand clamp into one unit. The components are closely matched and scientifically arranged. It can be directly assembled to the bottom of the crescent beam triangular piece. The whole is detachable and reusable. There is no need to configure a complete set of equipment at each crescent beam position, which greatly reduces the investment in construction equipment, simplifies the on-site installation and dismantling process, and has the advantages of structural stability, versatility and economy. It is suitable for the batch construction needs of deep foundation pit support.

[0018] 3. The steel strand installation device of the present invention realizes the synchronous clamping and transmission of multiple bundles of steel strands through steel strand clamps, which changes the traditional manual single-strand threading operation mode. Multiple steel strands can be installed at one time, which significantly improves the threading efficiency, reduces the number of workers and labor intensity, and shortens the construction cycle of foundation pit support. The power system, together with the conveyor belt and sliding support, realizes uniform and stable transmission, greatly improves the level of construction mechanization and automation, and effectively solves the problems of slow construction progress and difficulty of multiple people cooperating in traditional construction.

[0019] 4. The steel strand installation device of the present invention, through the double guidance and protection of the guide shaft and the guide rail, allows the steel strand to be transported around the guide shaft, avoiding direct contact and scratching with the inner wall of the steel strand channel. The steel strand clamp moves smoothly under the constraint of the guide rail, and multiple steel strands are isolated from each other and do not interfere with each other, fundamentally reducing the risk of friction, scratches and breakage during tensioning, effectively protecting the mechanical properties of the steel strand, improving the quality of prestressing tensioning, and enhancing the safety and reliability of the foundation pit support structure.

[0020] 5. The steel strand installation device of the present invention adopts a modular and detachable design for all key components. The conveying unit, steel strand clamp, guide rail and guide shaft can be quickly disassembled and transported. A single set of devices can be used repeatedly at multiple crescent beam construction positions, which greatly reduces material consumption and equipment costs. At the same time, the operating hole facilitates personnel to quickly complete the anchoring operation. The overall construction process is simple, safe and controllable, which not only improves the construction quality, but also reduces the overall construction cost, and has good engineering promotion value. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the deep foundation pit steel support plan of a multi-wire bundle steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the steel strand channel structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the transmission unit structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the steel strand clamp structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the sliding support structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the guide rail structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the guide shaft structure of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the construction method of a multi-strand steel strand installation device for deep foundation pit support according to an embodiment of the present invention.

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-top beam, 2-steel strand channel, 3-steel strand, 4-operating hole, 5-transfer unit, 6-steel strand clamp, 601-clamping piece, 602-guide wheel, 7-guide rail, 701-guide rail groove, 702-guide rail bolt hole, 8-guide shaft, 801-rotating disk, 9-power system, 10-rotating assembly, 11-conveyor belt, 12-sliding support, 1201-support bolt hole, 13-shield, 14-bolt, 15-slide rail, 16-transmission base, 17-guide groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1 This invention provides a multi-strand steel strand installation device for deep foundation pit support, comprising: a steel strand channel 2 and an operating hole 4 at one end of the steel strand channel 2, wherein the steel strand channel 2 is located at the bottom end of a triangular member. The steel strand channel 2 is internally provided with a conveying unit 5 and a guide rail 7. The conveying unit 5 is located at the bottom end of the steel strand channel 2, and the guide rail 7 is located at the top end of the steel strand channel 2. A steel strand clamp 6 is provided between the conveying unit 5 and the guide rail 7. The steel strand clamp 6 has multiple through holes, and one end of a steel strand 3 is fixed in one of the through holes on the steel strand clamp 6. Both ends of the steel strand clamp 6 are respectively connected to the conveying unit 5 and the guide rail 7, and are driven by the conveying unit 5 to move back and forth along the guide rail 7. By fixing multiple bundles of steel strands 3 into the through holes of the steel strand clamp 6, friction between the bundles of steel strands 3 is avoided during tensioning, thus protecting the steel strands 3 from damage. Then, the steel strand clamp 6 is driven by the conveying unit 5 to transport the ends of the steel strands 3 from one end of the steel strand channel 2 to the other end. Finally, the steel strands 3 are fixed to the anchors through the operating holes 4, completing the overall tensioning of the steel strands 3 and realizing the installation of the steel strands 3. When using this device to install the steel strands 3, multiple steel strands 3 can be inserted simultaneously, improving work efficiency and reducing mutual friction between multiple steel strands 3, thus avoiding damage.

[0025] The steel strand channel 2 is also equipped with a guide shaft 8, which is arranged parallel to the steel strand clamp 6. The guide shaft 8 has rotating disks 801 at both ends, which are fixed to the top and bottom of the steel strand channel 2 respectively, allowing the guide shaft 8 to rotate axially along its central axis between the rotating disks 801. The steel strand 3 is fixed to the steel strand clamp 6 after passing over the guide shaft 8. The guide shaft 8 prevents the steel strand 3 from rubbing against the inner wall of the steel strand channel 2 when pulled, thus ensuring that the steel strand 3 is not damaged.

[0026] The bottom side of the guide rail 7 is provided with a guide rail groove 701 along its length direction, and both ends of the guide rail 7 are provided with guide rail bolt holes 702. The guide rail 7 is fixed in the steel strand channel 2 by passing bolts 14 through the guide rail bolt holes 702.

[0027] The operating hole 4 is located at one end of the steel strand channel 2 and is connected to the steel strand channel 2. After the end of the steel strand 3 is transported to one end of the operating hole 4 of the steel strand channel 2, the steel strand 3 is fixed to the anchor by operating in the operating hole 4.

[0028] The steel strand clamp 6 has a clamping piece 601 in the through hole, which clamps the steel strand 3. The top of the steel strand clamp 6 is provided with a guide wheel 602, which is located in the guide groove 701 and rolls in the guide groove 701 to reduce the friction between them.

[0029] The conveying unit 5 includes a transmission base 16 and a power system 9 mounted on the transmission base 16. The bottom of the transmission base 16 is a long strip plate with semi-circular arc plates at both ends. The periphery of the bottom plate has an upper edge with a guide groove 17. The power system 9 consists of drive wheels located at both ends of the transmission base 16. Rotating components 10 are mounted on the drive wheels and are driven to rotate by the power system 9. Conveyor belts 11 are mounted on the rotating components 10 at both ends. Sliding supports 12 are fixed on the conveyor belts 11 and move synchronously with the conveyor belts 11. The sliding supports 12 have protrusions on both sides. One protrusion is fixedly connected to the conveyor belts 11, and the other protrusion is located in the guide groove 17 and slides along the guide groove 17.

[0030] The bottom end of the steel strand clamp 6 is fixedly connected to a connecting plate, which extends to one side and has a connecting hole. The sliding support 12 is also provided with a support bolt hole 1201. The connecting plate is fixed to the sliding support 12 by a bolt 14 passing through the connecting hole, and the bolt 14 is tightened in the support bolt hole 1201 after passing through the connecting hole.

[0031] It is understood that a slide rail 15 is formed between the outer edge of the transmission base 16 and the conveyor belt 11, and the sliding support 12 is disposed in the slide rail 15. When the power system 9 drives the rotating component 10 to rotate, it drives the conveyor belt 11 to rotate, thereby causing the sliding support 12 to slide back and forth in the slide rail 15. Under the action of the steel strand clamp 6, the steel strand 3 is driven to move in the steel strand channel 2, thereby completing the installation of the steel strand 3.

[0032] In a preferred embodiment, the two ends of the transmission base 16 are fixed to the bottom surface of the steel strand channel 2 by bolts 14, and the bolts 14 are also fitted with washers 13.

[0033] In a preferred embodiment, since the conveyor belt 11 moves around the two rotating components 10, a straight slide rail 15 is formed between its two sides and the outer edge of the transmission base 16, and a sliding support 12 is provided in each of the slide rails 15. In actual use, either of the two sliding supports 12 can be used alone to install the steel strand clamp 6, or both sliding supports 12 can be installed with steel strand clamps 6 for simultaneous use.

[0034] Furthermore, in the steel strand channel 2, the conveying unit 5 is detachable. After the steel strand 3 at the current crescent beam is installed, the conveying unit 5 and the steel strand clamp 6 in the steel strand channel 2 are removed, and the strands are transported to the next crescent beam for use. Multiple crescent beam steel strands can be installed using a single device, which is convenient and allows for reuse, thus improving economic efficiency.

[0035] Example 2 This invention provides a construction method for a multi-strand steel strand installation device for deep foundation pit support, specifically including the following steps: S100. Fix the steel strand channel 2 to the preset position at the bottom of the crescent beam triangular piece, ensuring that the installation is firm and the axis is horizontal, and ensuring that the operating hole 4 is fixed to the steel strand channel 2 and connected. S200. Fix the guide rail 7 to the top of the steel strand channel 2, and tighten it with bolts 14 through the guide rail bolt holes 702 to ensure that the guide rail groove 701 is flat and without jamming. Install the guide shaft 8 parallel to the steel strand clamp 6, and fix the rotating discs 801 at both ends to the top and bottom of the steel strand channel 2. Adjust until the rotation is smooth. S300. Install the power system 9, rotating component 10, and conveyor belt 11 onto the transmission base 16, fix the sliding support 12 and adjust it to move smoothly, then use bolts 14 to fix the transmission base 16 to the bottom of the steel strand channel 2, and put on a gasket 13 to enhance stability. S400. Install the steel strand clamp 6 between the conveying unit 5 and the guide rail 7. The guide wheel 602 is embedded in the guide rail groove 701. The bottom connecting plate is fixed to the sliding support 12 by bolts 14. The multiple bundles of steel strands 3 are wrapped around the guide shaft 8, passed through the through hole of the steel strand clamp 6 and clamped by the clamping piece 601 to ensure that there is no loosening and no contact. S500, start the power system 9, drive the conveyor belt 11, sliding support 12 and steel strand clamp 6 to move, so that the steel strand 3 is transported along the steel strand channel 2 to one end of the operating hole 4, shut off the power system 9, fix the steel strand 3 to the anchor in the operating hole 4, and complete the tensioning installation. S600, loosen clamp 601, remove steel strand clamp 6 and conveyor unit 5, clean and inspect components, and then transport to the next crescent beam for reuse.

[0036] In step S100, before installation, the bottom mounting reference surface of the crescent beam triangular piece must be thoroughly cleaned to avoid debris and laitance affecting the installation accuracy of the steel strand channel 2. The levelness and axis position must be accurately corrected to ensure that the steel strand channel 2 is coaxial with the anchor installation end; otherwise, it will affect the subsequent threading and tensioning effect of the steel strand 3. The operating hole 4 must be tightly connected to the steel strand channel 2, and the hole size must be strictly matched to meet the manual operation space and ensure that the end of the steel strand 3 can be smoothly threaded out and anchored. After installation, the connection firmness must be repeatedly checked to prevent loosening or misalignment in subsequent operations.

[0037] In step S200, when installing the guide rail 7, it is necessary to ensure that it is straight without warping or offset. The guide rail groove 701 must face the inside of the channel. When tightening the bolt 14 through the guide rail bolt hole 702, the force must be uniform to avoid uneven force on the guide rail 7 and deformation. The guide shaft 8 must be strictly parallel to the steel strand clamp 6, otherwise it will cause offset and friction when the steel strand 3 is conveyed. The rotating disk 801 must be firmly fixed. During debugging, it is necessary to ensure that the guide shaft 8 rotates smoothly without jamming or slippage. At the same time, it is necessary to check that there is no debris blocking the inside of the guide rail groove 701 to ensure that the guide wheel 602 of the subsequent steel strand clamp 6 can roll smoothly.

[0038] In step S300, when assembling the conveyor unit 5, the transmission base 16 must be placed horizontally. The installation of the power system 9, rotating component 10, and conveyor belt 11 must be precise. When debugging the power system 9, repeated test runs are required to ensure that the conveyor belt 11 runs smoothly without deviation, so as to avoid affecting the synchronous conveying of the steel strand 3. The boss of the sliding support 12 must be precisely matched with the conveyor belt 11 and the guide groove 17. The locking force must be moderate to ensure synchronous movement while avoiding excessive locking that could cause sliding jamming. When fixing the transmission base 16, washers 13 must be fitted on the bolts 14 to enhance connection stability and shock resistance. After fixing, it must be confirmed that the conveyor unit 5 and the guide rail 7 are vertically aligned, the sliding support 12 moves within the slide rail 15 without any interference, and the power output direction is consistent with the axis of the steel strand channel 2. Otherwise, the conveying of the steel strand 3 will be offset.

[0039] In step S400, when installing the steel strand clamp 6, the guide wheel 602 must be precisely embedded in the guide rail groove 701 to ensure smooth rolling, reduce movement friction, and avoid jamming that could affect the conveying of the steel strand 3. The connection between the steel strand clamp 6 and the sliding support 12 must be rigid and firm, and the tightening force of the bolt 14 must be moderate to prevent loosening that could cause the steel strand clamp 6 to shift. The steel strand 3 must first pass around the guide shaft 8 before being fixed, and it is strictly forbidden to directly contact the inner wall of the steel strand channel 2, otherwise frictional damage will occur during the threading and tensioning process. When the clamping plate 601 clamps the steel strand 3, the force must be uniform to ensure that the clamping is firm and there is no slippage, while avoiding excessive force that could damage the steel strand 3. At the same time, it is necessary to ensure that multiple bundles of steel strand 3 are isolated from each other and do not come into contact to prevent mutual friction and damage.

[0040] In step S500, before starting the power system 9, the connection of each component must be checked again to ensure there is no looseness or interference before starting. The power system 9 must maintain a constant speed during operation to avoid unstable conveying of the steel strand 3 and damage due to excessive speed. During the conveying of the steel strand 3, the rotation of the guide shaft 8 must be observed to ensure that it rotates synchronously with the steel strand 3 without jamming. If any abnormality occurs, the power system 9 must be shut down immediately for troubleshooting. When the end of the steel strand 3 is conveyed to the corresponding position of the operating hole 4, the power system 9 must be shut down precisely to avoid over-conveying which may cause the steel strand 3 to bend or shift. During anchoring operations, the operators must operate in accordance with regulations within the operating hole 4 to ensure that the end of the steel strand 3 is firmly fixed to the anchor and that the tension meets the design requirements to avoid insufficient or excessive tension that could lead to safety hazards in the support.

[0041] In step S600, before disassembly, it must be confirmed that the steel strand 3 is completely and securely fixed without any looseness. When loosening the clamp 601, the operation should be slow to avoid excessive force that could damage the steel strand 3 and the clamp 601. When disassembling the bolt 14, the operation should be carried out in sequence, and the steel strand clamp 6, the conveying unit 5, and other components should be handled gently to avoid collisions that could cause deformation or damage. When disassembling the guide rail 7 and the guide shaft 8, the precision components such as the guide rail groove 701 and the rotating disk 801 should be protected. After the components are disassembled, surface debris, dust, and oil should be cleaned in a timely manner, and the integrity of each component should be carefully checked. Components that are severely worn or deformed should be replaced in a timely manner. After maintenance, the components should be transported to ensure the accuracy and service life of subsequent reuse. During the transportation process, protective measures should be taken to prevent the components from being damaged by impacts.

[0042] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-strand steel strand installation device for deep foundation pit support, characterized in that, include: A steel strand channel (2) and an operating hole (4) located at one end of the steel strand channel (2), wherein the steel strand channel (2) is located at the bottom end of the triangular piece; The steel strand channel (2) is equipped with a conveying unit (5) and a guide rail (7) inside. The conveying unit (5) is located at the bottom end of the steel strand channel (2), and the guide rail (7) is located at the top end of the steel strand channel (2). A steel strand clamp (6) is provided between the conveying unit (5) and the guide rail (7). The steel strand clamp (6) has multiple through holes, and one end of the steel strand (3) is fixed in the through hole on the steel strand clamp (6). The two ends of the steel strand clamp (6) are respectively connected to the conveying unit (5) and the guide rail (7). Driven by the conveying unit (5), it moves back and forth along the guide rail (7). The steel strand clamp (6) is driven by the conveying unit (5) to transport the end of the steel strand (3) from one end of the steel strand channel (2) to the other end. Then, the steel strand (3) is fixed to the anchor in the operating hole (4) to complete the installation of the steel strand (3).

2. The deep foundation pit support multi-strand steel strand installation device according to claim 1, characterized in that, The steel strand channel (2) is also provided with a guide shaft (8), which is arranged parallel to the steel strand clamp (6). It has rotating disks (801) at both ends. The rotating disks (801) at both ends are fixed to the top and bottom ends of the steel strand channel (2), so that the guide shaft (8) rotates axially along its central axis between the rotating disks (801) at both ends. The steel strand (3) is fixed to the steel strand clamp (6) after passing around the guide shaft (8).

3. The deep foundation pit support multi-strand steel strand installation device according to claim 1, characterized in that, The operating hole (4) is located at one end of the steel strand channel (2) and is connected to the steel strand channel (2). After the end of the steel strand (3) is transported to one end of the operating hole (4) of the steel strand channel (2), the steel strand (3) is fixed to the anchor by operating in the operating hole (4).

4. A multi-strand steel strand installation device for deep foundation pit support according to any one of claims 1-3, characterized in that, The bottom side of the guide rail (7) is provided with a guide rail groove (701) along its length direction, and both ends of the guide rail (7) are provided with guide rail bolt holes (702). The guide rail (7) is fixed in the steel strand channel (2) by passing a bolt (14) through the guide rail bolt hole (702).

5. The deep foundation pit support multi-strand steel strand installation device according to claim 4, characterized in that, The steel strand clamp (6) has a clamping piece (601) in the through hole, which clamps the steel strand (3). The top of the steel strand clamp (6) is provided with a guide wheel (602), which is located in the guide groove (701) and rolls in the guide groove (701).

6. The deep foundation pit support multi-strand steel strand installation device according to claim 5, characterized in that, The bottom end of the steel strand clamp (6) is fixedly connected to a connecting plate, which extends to one side and has a connecting hole. The sliding support (12) is also provided with a support bolt hole (1201). The connecting plate is fixed to the sliding bracket (12) by passing a bolt (14) through the connecting hole. The bolt (14) is tightened into the bracket bolt hole (1201) after passing through the connecting hole.

7. The deep foundation pit support multi-strand steel strand installation device according to claim 6, characterized in that, The transmission unit (5) includes a transmission base (16) and a power system (9) provided on the transmission base (16). The bottom of the transmission base (16) is a long strip plate with semi-circular arc plates at both ends. The periphery of the bottom plate is provided with an upper edge, and a guide groove (17) is provided in the upper edge. The power system (9) consists of drive wheels located at both ends of the transmission base (16). The drive wheels are fitted with rotating components (10), which are driven to rotate by the power system (9). Conveyor belts (11) are fitted on the rotating components (10) at both ends. A sliding support (12) is fixed on the conveyor belt (11). The sliding support (12) moves synchronously with the conveyor belt (11). The sliding support (12) has protrusions on both sides. One protrusion is fixedly connected to the conveyor belt (11), and the other protrusion is located in the guide groove (17) and slides along the guide groove (17).

8. The deep foundation pit support multi-strand steel strand installation device according to claim 7, characterized in that, The outer edge of the transmission base (16) forms a slide (15) between the transmission belt (11) and the outer edge of the transmission base (16). The sliding support (12) is located in the slide (15). When the power system (9) drives the rotating component (10) to rotate, it drives the transmission belt (11) to rotate, thereby causing the sliding support (12) to slide back and forth in the slide (15).

9. A multi-strand steel strand installation device for deep foundation pit support according to claim 8, characterized in that, The conveyor belt (11) moves around the two rotating components (10), and a straight slide (15) is formed between its two sides and the outer edge of the transmission base (16). Sliding supports (12) are provided in the slides (15) on both sides. The steel strand clamp (6) is installed on one of the two sliding supports (12) for use alone or on both sliding supports (12) for use simultaneously.

10. A construction method for a multi-strand steel strand installation device for deep foundation pit support, implemented using the multi-strand steel strand installation device for deep foundation pit support as described in any one of claims 1-9, characterized in that, Includes the following steps: S100. Fix the steel strand channel (2) to the pre-set position at the bottom of the crescent beam triangular piece, ensuring that the installation is firm and the axis is horizontal, and ensuring that the operating hole (4) is fixed to the steel strand channel (2) and connected. S200. Fix the guide rail (7) to the top of the steel strand channel (2), and tighten it with bolts (14) through the guide rail bolt holes (702) to ensure that the guide rail groove (701) is flat and without jamming. Install the guide shaft (8) parallel to the steel strand clamp (6), and fix the rotating discs (801) at both ends to the top and bottom of the steel strand channel (2). Adjust until the rotation is smooth. S300, Install the power system (9), rotating component (10), and conveyor belt (11) on the transmission base (16), fix the sliding support (12) and adjust it to move smoothly, then use bolts (14) to fix the transmission base (16) to the bottom of the steel strand channel (2), and put on a gasket (13) to enhance stability. S400, Install the steel strand clamp (6) between the conveying unit (5) and the guide rail (7), embed the guide wheel (602) into the guide rail groove (701), and fix the bottom connecting plate to the sliding support (12) with bolts (14). Pass multiple bundles of steel strands (3) around the guide shaft (8), pass through the through hole of the steel strand clamp (6) and be clamped by the clamping piece (601) to ensure that there is no looseness and no contact. S500, start the power system (9), drive the conveyor belt (11), sliding support (12) and steel strand clamp (6) to move, so that the steel strand (3) is transported along the steel strand channel (2) to one end of the operating hole (4), turn off the power system (9), fix the steel strand (3) to the anchor in the operating hole (4) to complete the tensioning installation; S600, loosen the clamp (601), remove the steel strand clamp (6) and the conveying unit (5), clean and inspect the parts, and then transport them to the next crescent beam for reuse.

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