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CN-121992805-A - Double-deck steel sheet pile cofferdam structure

CN121992805ACN 121992805 ACN121992805 ACN 121992805ACN-121992805-A

Abstract

The invention discloses a double-layer steel sheet pile cofferdam structure, which relates to the technical field of steel cofferdam construction and has the technical scheme that the double-layer steel sheet pile cofferdam structure comprises an inner layer steel sheet pile and an outer layer steel sheet pile arranged outside the inner layer steel sheet pile, wherein a transition water channel for draining water is formed between the inner layer steel sheet pile and the outer layer steel sheet pile; and inner supporting steel beams with two ends fixed on the inner layer steel sheet piles and the outer layer steel sheet piles are uniformly distributed in the transition water channel. By arranging the double-layer steel sheet pile forms of the inner-layer steel sheet piles and the outer-layer steel sheet piles, water seepage can enter the transition water channel preferentially to be collected when water seepage occurs in the steel cofferdam, and the inner-layer steel sheet piles in the steel cofferdam cannot leak inside when the transition water channel is full due to the fact that the inner-layer steel sheet piles are not under the pressure of external water pressure, so that enough buffering time is provided for workers to repair seepage points and pump water by using the transition water channel.

Inventors

  • PAN ZIYANG
  • SUN WEI
  • HE XIANG
  • HUANG JINGEN
  • XU MING
  • GAO ZONGZHI
  • CHANG ZHIXIAN

Assignees

  • 安徽建工建设投资集团有限公司

Dates

Publication Date
20260508
Application Date
20260210

Claims (10)

  1. 1. A double-deck steel sheet pile cofferdam structure, its characterized in that: The water drainage device comprises an inner layer steel sheet pile (1) and an outer layer steel sheet pile (11) arranged outside the inner layer steel sheet pile (1), wherein a transition water channel (12) for water drainage is formed between the inner layer steel sheet pile (1) and the outer layer steel sheet pile (11); And inner supporting steel beams (13) with two ends fixed on the inner layer steel sheet piles (1) and the outer layer steel sheet piles (11) are uniformly distributed in the transition water channel (12).
  2. 2. The double-layer steel sheet pile cofferdam structure of claim 1, wherein the transition water channel (12) is internally provided with partition plates (2) at intervals, so that the transition water channel (12) is divided into a plurality of groups of independent water storage tanks.
  3. 3. The double-layer steel sheet pile cofferdam structure according to claim 2, wherein the inner supporting steel beams (13) are arranged in pairs, wherein L-shaped lapping grooves (21) are formed on opposite sides of two inner supporting steel beams (13) of each group, and lapping plates (22) are arranged at the upper ends of the partition plates (2); The partition plate (2) is movably clamped on the L-shaped lapping groove (21) between the two inner supporting steel beams (13) through the lapping plate (22), and two ends of the partition plate are respectively movably abutted with the wall bodies of the inner layer steel sheet piles (1) and the outer layer steel sheet piles (11).
  4. 4. The double-layer steel sheet pile cofferdam structure according to claim 2 or 3, characterized in that overflow holes (3) are formed in the partition plates (2), a drainage bucket (31) for drainage is arranged on one side of the partition plates (2), a water wheel (32) is arranged at the lower end of the drainage bucket (31), a longitudinal frame plate (33) is arranged between the partition plates (2), and bearings at two ends of a rotating shaft of the water wheel (32) are arranged on the longitudinal frame plate (33); The inner supporting steel beam (13) is erected with a hand alarm (34) and a transmission unit, and the water wheel (32) transmits to a rocker shaft of the hand alarm (34) through the transmission unit.
  5. 5. The double-layer steel sheet pile cofferdam structure of claim 4, wherein a transverse frame plate (4) is arranged between the inner supporting steel beams (13), a threaded screw rod (41) is rotatably arranged on the transverse frame plate (4), the end part of the threaded screw rod (41) is connected with a rocking shaft of a hand-operated alarm (34), a limiting arm (42) arranged on the transverse frame plate (4) is fixed on one side of the hand-operated alarm (34), and intermeshing umbrella teeth (43) are arranged on one end, far away from the hand-operated alarm (34), of the threaded screw rod (41) and a rotating shaft of a water wheel (32).
  6. 6. The double-layer steel sheet pile cofferdam structure of claim 4, wherein the limiting arm (42) is movably connected on the transverse frame plate (4) in a penetrating way, a spline shaft (5) is fixedly connected on a rocking shaft of the hand-operated alarm (34), and a key slot (51) matched with the spline shaft (5) is formed on the threaded screw rod (41); a linkage unit in threaded sleeve connection with the threaded screw rod (41) is arranged between the threaded screw rod (41) and the limiting arm (42), so that the limiting arm (42) can be driven to move upwards when the threaded screw rod (41) rotates.
  7. 7. The double-layer steel sheet pile cofferdam structure of claim 6, wherein the linkage unit comprises a screw rod sleeve plate (6) which is sleeved on a screw rod (41) through threads and a supporting block (61) which is fixedly arranged at the bottom of the limiting arm (42), a clamping groove (62) is formed in the bottom of the supporting block (61), and a clamping plate (63) which is movably clamped with the clamping groove (62) is arranged on the screw rod sleeve plate (6).
  8. 8. The double-layer steel sheet pile cofferdam structure of claim 7, wherein the supporting blocks (61) are made of materials capable of being adsorbed by magnetic force, the bottom of the transverse frame plate (4) is provided with a containing groove (7) matched with the supporting blocks (61), and a magnet is arranged in the containing groove (7).
  9. 9. The double-layer steel sheet pile cofferdam structure of claim 6, wherein a bottom supporting plate (8) for limiting the screw rod sleeve plate (6) and the supporting block (61) is further arranged between the partition plates (2).
  10. 10. The double-layer steel sheet pile cofferdam structure of claim 4, wherein the inner layer steel sheet pile (1) and the outer layer steel sheet pile (11) are provided with folded plate strips (9) which are movably abutted against two sides of the partition plate (2).

Description

Double-deck steel sheet pile cofferdam structure Technical Field The invention relates to the technical field of steel cofferdam construction, in particular to a double-layer steel sheet pile cofferdam structure. Background The steel cofferdam is a construction member for assisting in building an underwater foundation pit construction platform, the existing underwater foundation pit cofferdam structure is in the form of single-row steel sheet piles or underground continuous walls, water overflow often occurs in the form of the steel sheet piles, when overflow occurs, workers need to pump water in the steel cofferdam and strengthen sealing of water leakage points, and a single-layer form needs to be operated quickly, so that errors occur in work easily, the construction of the underground continuous wall cofferdam is complex, the construction cost is high, and popularization and application in projects with complex water area conditions are not facilitated. In view of this, the present invention has been devised to solve the above-described problems. The foregoing is provided merely to facilitate an understanding of the principles of the invention and is not intended to constitute an admission that the foregoing is of the closest prior art. Disclosure of Invention The invention aims to solve the defects and provides a double-layer steel sheet pile cofferdam structure. In order to solve the technical problems, the invention adopts the following technical scheme: the double-layer steel sheet pile cofferdam structure comprises an inner layer steel sheet pile and an outer layer steel sheet pile arranged on the outer side of the inner layer steel sheet pile, wherein a transition water channel for draining water is formed between the inner layer steel sheet pile and the outer layer steel sheet pile, and inner supporting steel beams with two ends fixed on the inner layer steel sheet pile and the outer layer steel sheet pile are uniformly distributed in the transition water channel. Furthermore, the partition plates are arranged in the transition water channel at intervals, so that the transition water channel is divided into a plurality of groups of independent water storage tanks. Further, the inner supporting steel beams are arranged in pairs, wherein L-shaped lap grooves are formed in opposite sides of two inner supporting steel beams of each group, and lap plates are arranged at the upper ends of the partition plates; The division plate is movably clamped on the L-shaped lapping groove between the two inner supporting steel beams through the lapping plate, and two ends of the division plate are respectively movably abutted with the wall bodies of the inner layer steel sheet pile and the outer layer steel sheet pile. Further, overflow holes are formed in the partition plates, a drainage bucket for drainage is arranged on one side of each partition plate, a water wheel is arranged at the lower end of each drainage bucket, a longitudinal frame plate is arranged between the partition plates, and bearings at two ends of a rotating shaft of the water wheel are arranged on the longitudinal frame plates; The inner support steel beam is erected with a hand alarm and a transmission unit, and the water wheel is transmitted to a rocking shaft of the hand alarm through the transmission unit. Further, be provided with the cross frame board between the internal stay girder steel, rotate on the cross frame board and install the screw thread lead screw, screw thread lead screw tip is connected with the rocker of hand alarm, hand alarm one side is fixed with the spacing arm of installing on the cross frame board, is provided with intermeshing's umbrella tooth in the pivot of the one end that hand alarm was kept away from to the screw thread lead screw and water wheels. Further, the limiting arm is movably connected to the transverse frame plate in a penetrating manner, a spline shaft is fixedly connected to a rocking shaft of the hand-operated alarm, and a key slot matched with the spline shaft is formed in the threaded screw rod; the linkage unit in threaded sleeve connection with the threaded screw rod is arranged between the threaded screw rod and the limiting arm, so that the limiting arm can be driven to move upwards when the threaded screw rod rotates. Further, the linkage unit comprises a screw rod sleeve plate in threaded sleeve connection with the screw rod and a supporting block fixedly arranged at the bottom of the limiting arm, a clamping groove is formed in the bottom of the supporting block, and a clamping plate movably clamped with the clamping groove is arranged on the screw rod sleeve plate. Further, the support block is made of a material capable of being adsorbed by magnetic force, a containing groove matched with the support block is formed in the bottom of the transverse frame plate, and a magnet is arranged in the containing groove. Further, a bottom supporting plate for limiting the screw rod sleeve plate