CN-121992785-A - Multi-strand steel strand installation device for deep foundation pit support and construction method

CN121992785ACN 121992785 ACN121992785 ACN 121992785ACN-121992785-A

Abstract

The invention discloses a multi-strand steel strand installation device for deep foundation pit support and a construction method, wherein the device comprises a steel strand channel and an operation hole arranged at one end of the steel strand channel, the steel strand channel is arranged at 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, one end of the steel strand is fixed in the through holes in the steel strand clamp, two ends of the steel strand clamp are respectively connected in the conveying unit and the guide rail and driven by the conveying unit to move back and forth along the guide rail, the conveying unit drives the steel strand clamp to convey the end of the steel strand from one end of the steel strand channel to the other end, and then the steel strand is fixed on an anchor part through operation hole. Can penetrate simultaneously by many steel strands to reduce the mutual friction between many steel strands, avoid causing the damage.

Inventors

YIN ZHIHAO
ZHU BO
ZHENG YIFEI
GU SHUBIN
WU TIEWEI
QIAN RUI
DONG BAOBIN
XIN PINGPING

Assignees

中国一冶集团有限公司

Dates

Publication Date: 20260508
Application Date: 20260324

Claims (10)

1. The multi-strand steel strand installation device for deep foundation pit support is characterized by comprising a steel strand channel (2) and an operation hole (4) arranged at one end of the steel strand channel (2), wherein the steel strand channel (2) is arranged at the bottom end of a triangular piece; The steel strand conveying device is characterized in that a conveying unit (5) and a guide rail (7) are arranged in the steel strand passage (2), the conveying unit (5) is arranged at the bottom end of the steel strand passage (2), the guide rail (7) is arranged at the top end of the steel strand passage (2), a steel strand clamp (6) is arranged between the conveying unit (5) and the guide rail (7), a plurality of through holes are formed in the steel strand clamp (6), and one end of the steel strand (3) is fixed in the through holes in 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), the steel strand clamp is driven by the conveying unit (5) to move back and forth along the guide rail (7), the conveying unit (5) drives the steel strand clamp (6) to convey the end of the steel strand (3) from one end of the steel strand channel (2) to the other end, and the steel strand (3) is fixed on the anchoring piece through operation in the operation hole (4) so as to finish the installation of the steel strand (3).
2. The multi-strand steel strand installation device for deep foundation pit support according to claim 1, wherein a guide shaft (8) is further arranged in the steel strand channel (2), the guide shaft (8) is arranged in parallel with the steel strand clamp (6), two ends of the guide shaft are provided with rotating discs (801), the rotating discs (801) at the two ends are respectively fixed at the top and bottom ends of the steel strand channel (2), and the guide shaft (8) axially rotates along the central shaft between the rotating discs (801) at the two ends; The steel strand (3) bypasses the guide shaft (8) and is then fixed on the steel strand clamp (6).
3. The multi-strand steel strand installation device for deep foundation pit support according to claim 1, wherein the operation hole (4) is arranged at one end of the steel strand passage (2), is communicated with the steel strand passage (2), and is operated in the operation hole (4) after the end of the steel strand (3) is transported to one end of the operation hole (4) of the steel strand passage (2), so that the steel strand (3) is fixed on the anchoring piece.
4. A deep foundation pit supporting multi-wire bundle stranded wire installation device 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 the length direction thereof, and both ends of the guide rail (7) are provided with guide rail bolt holes (702), and the guide rail (7) is fixed in the stranded wire channel (2) by bolts (14) penetrating the guide rail bolt holes (702).
5. The multi-strand steel strand installation device for deep foundation pit support according to claim 4, wherein a clamping piece (601) is arranged in a through hole of the steel strand clamp (6), the steel strand (3) is clamped by the clamping piece (601), a guide wheel (602) is arranged at the top end of the steel strand clamp (6), and the guide wheel (602) is arranged in a guide rail groove (701) and rolls in the guide rail groove (701).
6. The multi-wire bundle steel strand installation device for deep foundation pit support according to claim 5, wherein a connecting plate is fixedly connected to the bottom end of the steel strand clamp (6), the connecting plate extends to one side, a connecting hole is formed in the extending connecting plate, and a bracket bolt hole (1201) is further formed in the sliding bracket (12); The connection plate is fastened to the sliding bracket (12) by means of a bolt (14) passing through the connection hole, which bolt (14) is screwed into the bracket bolt hole (1201) after passing through the connection hole.
7. The deep foundation pit supporting multi-wire bundle steel strand installation device according to claim 6, wherein the conveying unit (5) comprises a transmission base (16) and a power system (9) arranged on the transmission base (16), the bottom of the transmission base (16) is a strip-shaped plate, two ends of the transmission base are semicircular plates, the periphery of the base is upwards provided with an upper edge, and a guide groove (17) is arranged in the upper edge; the power system (9) is a driving wheel respectively arranged at two ends of the transmission base (16), the driving wheel is sleeved with a rotating assembly (10), the rotating assembly (10) is driven to rotate by the power system (9), and the rotating assembly (10) at two ends is sleeved with a conveying belt (11); The sliding bracket (12) is fixed on the conveyor belt (11), the sliding bracket (12) synchronously moves along with the conveyor belt (11), bosses are arranged on two sides of the sliding bracket (12), one boss is fixedly connected to the conveyor belt (11), and the boss on the other side is arranged in the guide groove (17) and slides along the guide groove (17).
8. The multi-strand steel strand installation device for deep foundation pit support according to claim 7, wherein a slide way (15) is formed between the outer edge of the transmission base (16) and the conveyor belt (11), the sliding bracket (12) is arranged in the slide way (15), and when the power system (9) drives the rotating assembly (10) to rotate, the conveyor belt (11) is driven to rotate, so that the sliding bracket (12) slides back and forth in the slide way (15).
9. The multi-wire bundle steel strand installation device for deep foundation pit support according to claim 8, wherein the conveyor belt (11) moves around two rotating assemblies (10), a straight slideway (15) is formed between two sides of the conveyor belt and the outer edge of the transmission base (16), and sliding brackets (12) are arranged in the slideways (15) on two sides; the steel strand clamp (6) is arranged on one of the two side sliding brackets (12) to be used independently or arranged on the two side sliding brackets (12) to be used synchronously.
10. A construction method of a multi-strand steel strand installation device for deep foundation pit support, which is realized by using the multi-strand steel strand installation device for deep foundation pit support as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: S100, fixing a steel strand passage (2) at a preset position at the bottom end of a crescent beam triangle, ensuring firm installation and horizontal axis, and ensuring that an operation hole (4) is fixed on the steel strand passage (2) for communication; s200, fixing a guide rail (7) on the top end of a steel strand channel (2), fastening the guide rail by using a bolt (14) through a guide rail bolt hole (702), ensuring that a guide rail groove (701) is smooth and free of clamping, installing a guide shaft (8) and a steel strand clamp (6) in parallel, fixing rotating discs (801) at two ends on the two ends of the top and bottom of the steel strand channel (2), and debugging until the steel strand channel rotates smoothly; S300, installing a power system (9), a rotating assembly (10) and a conveyor belt (11) on a transmission base (16), fixing a sliding bracket (12) and adjusting the sliding bracket to move smoothly, fixing the transmission base (16) on the bottom end of a steel strand channel (2) by using a bolt (14), and sleeving a gasket (13) to enhance stability; S400, installing a steel strand clamp (6) between a conveying unit (5) and a guide rail (7), embedding guide wheels (602) into a guide rail groove (701), fixing a bottom connecting plate to a sliding bracket (12) through bolts (14), bypassing a guide shaft (8) by a plurality of steel strands (3), penetrating through a through hole of the steel strand clamp (6) and clamping by a clamping piece (601), and ensuring no looseness and no contact; S500, starting a power system (9), driving a conveyor belt (11), a sliding bracket (12) and a steel strand clamp (6) to move, conveying the steel strand (3) to one end of an operation hole (4) along a steel strand channel (2), closing the power system (9), and fixing the steel strand (3) to an anchoring piece in the operation hole (4) to finish tensioning installation; S600, loosening the clamping piece (601), removing the steel strand clamp (6) and the conveying unit (5), cleaning the inspection part, and transporting to the next month dental beam for reuse.

Description

Multi-strand steel strand installation device for deep foundation pit support and construction method Technical Field The invention belongs to the technical field of foundation pit protection, and particularly relates to a deep foundation pit supporting multi-wire bundle steel strand installation device and a construction method. Background In the deep foundation pit supporting engineering, a crescent beam is used as a core supporting member and is mainly matched with an enclosing purlin beam and an anchoring assembly to form a closed supporting system for resisting active soil pressure outside a foundation pit, so that a safe construction space is provided for foundation pit excavation operation, and the deep foundation pit supporting engineering is one of key structures for guaranteeing the construction stability of the deep foundation pit. The steel strand is used as a core carrier for transmitting prestress in the crescent beam supporting system, the beam penetrating construction quality directly determines the supporting strength of the crescent beam and the overall safety of foundation pit supporting, and the steel strand is widely applied to engineering scenes such as various deep foundation pits and large building foundation pits which need high-strength supporting, is particularly suitable for deep foundation pit supporting operation with deep excavation and complex surrounding environment, and is a necessary construction link for connecting the crescent beam with an anchoring structure and realizing prestress transmission. At present, the crescent beam steel strand bundle penetrating construction in the traditional deep foundation pit supporting engineering does not form a mature automatic operation mode, and the whole bundle penetrating process is finished mainly by relying on manual single operation. During construction, a plurality of operators are matched in a cooperative mode, steel strands are firstly combed smoothly, then single steel strands are slowly pushed into a beam penetrating channel preset by a crescent beam by means of manpower, even if a simple traction tool is assisted in a part of scenes, the pushing direction and speed of the steel strands are manually controlled in the whole course, the beam penetrating process completely depends on the operation experience of the operators, special automatic conveying and guiding equipment is not adopted, the whole construction flow is rough, single beam penetrating is mainly adopted, and multi-beam synchronous beam penetrating operation is difficult to achieve. The traditional artificial single-joint beam penetrating method has a plurality of outstanding problems, and severely restricts the construction efficiency and the supporting safety. On one hand, the construction efficiency is extremely low, a single beam penetrating process is matched with a plurality of personnel in a cooperative manner, the labor cost investment is high, the beam penetrating process is slow, the requirement of high-efficiency construction of deep foundation pit engineering cannot be met, the whole construction period is easy to delay, on the other hand, the safety is difficult to ensure, in the beam penetrating and follow-up tensioning processes, due to the lack of a special guide structure, the steel strands are in direct contact with the side wall of a beam penetrating channel, severe friction can be generated, the surface of the steel strands is easily damaged and even broken due to the instantaneous acting force during long-term friction or tensioning, the prestress transmission effect of the steel strands is further influenced, the supporting bearing capacity of a crescent beam is reduced, potential safety hazards are brought to a foundation pit supporting structure, safety accidents such as foundation pit collapse and the like can not meet the double requirements of deep foundation pit supporting engineering on the construction safety and high efficiency. Disclosure of Invention Aiming at the defects or improvement demands of the prior art, the invention provides a multi-strand steel strand installation device for deep foundation pit support and a construction method, wherein a plurality of strands of steel strands are respectively fixed in through holes on a steel strand clamp so as to avoid friction among the plurality of strands of steel strands in the tensioning process, thereby protecting the steel strands from being damaged, then the steel strand clamp is driven by a conveying unit so as to convey the end parts of the steel strands from one end to the other end of a steel strand channel, and then the steel strands are fixed on an anchor piece through operation in an operation hole so as to complete integral tensioning of the steel strands, thereby realizing installation of the steel strands. When the device is used for installing the steel strands, a plurality of steel strands can penetrate simultaneously, the working efficiency is improved, the mutual