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CN-115949083-B - Bottom-sealing-free rapid-assembly hanging box cofferdam and installation method

CN115949083BCN 115949083 BCN115949083 BCN 115949083BCN-115949083-B

Abstract

The invention discloses a bottom-sealing-free rapid assembly hanging box cofferdam and an installation method, which belong to the technical field of lifting cofferdams and comprise a hanging system, a template system and a weir bottom overturning system, wherein the hanging system is positioned around the template system, the template system is positioned at the top side of the weir bottom overturning system, the hanging system comprises a positioning support system welded around the template system, two sides of the bottom of the positioning support system are provided with bearing support systems, the template system comprises two groups of integral wall plates and side panels which are sequentially connected with each other, the bottom sides of the two groups of integral wall plates are correspondingly connected with overturning bottom plates through hinges, the overturning bottom plates are positioned at the top side of the weir bottom overturning system, and the bottom side of the weir bottom overturning system comprises a bottom die fixed support welded at the bottom side of the overturning bottom plate.

Inventors

  • ZHANG WENZHI
  • LIU SIDE
  • JIANG XIAOHUI
  • YAO ZHENGFEI
  • WEN QIFU
  • MA QIZHU
  • GONG MIN
  • ZHOU YANG

Assignees

  • 中铁二十二局集团第三工程有限公司
  • 中铁二十二局集团有限公司

Dates

Publication Date
20260508
Application Date
20230209

Claims (10)

  1. 1. The quick assembled suspended box cofferdam without bottom sealing is characterized by comprising a hanging system (10), a template system (20) and a weir bottom overturning system (30), wherein the hanging system (10) is positioned around the template system (20), and the template system (20) is positioned on the top side of the weir bottom overturning system (30); The hanging system (10) comprises a positioning support system (101) welded around the template system (20), and two sides of the bottom of the positioning support system (101) are provided with bearing support systems (102); the template system (20) comprises two groups of integral wall plates (201) and side panels (203) which are connected with each other in sequence, the bottom sides of the two groups of integral wall plates (201) are correspondingly and rotatably connected with a turnover bottom plate (202) through hinges (204), and the turnover bottom plate (202) is positioned on the top side of the weir bottom turnover system (30); the weir bottom overturning system (30) comprises a bottom die fixed support (301) welded on the bottom side of the overturning bottom plate (202), and an overturning structure (302) is arranged on the bottom side of the bottom die fixed support (301) through a longitudinal beam (321).
  2. 2. The bottom-sealing-free rapid-assembly hanging box cofferdam as set forth in claim 1, wherein: The positioning support system (101) comprises connecting vertical beams (114) arranged on one sides of two groups of integral wall plates (201) far away from each other, double-spliced-groove steel positioning beams (111) are arranged on the top sides of the two groups of connecting vertical beams (114) on each side, connecting screw rods (113) are arranged between the double-spliced-groove steel positioning beams (111) and the connecting vertical beams (114), connecting screw caps (112) are screwed at two ends of each connecting screw rod (113) to fix the connection of the double-spliced-groove steel positioning beams (111) and the connecting vertical beams (114), and tension rod pieces are arranged between the connecting vertical beams (114) on one sides of the two groups of integral wall plates (201) far away from each other and located above the two groups of integral wall plates (201).
  3. 3. The bottom-sealing-free rapid-assembly hanging box cofferdam as set forth in claim 2, wherein: The tension rod piece comprises a connecting compression rod (117) for connecting two groups of connecting vertical beams (114), screw steel tension rods (115) are arranged at two ends of the connecting compression rod (117), and the screw steel tension rods (115) penetrate through the connecting vertical beams (114) and are fixed through tension rod nuts (116).
  4. 4. A bottom-sealing-free rapid-assembly hanging box cofferdam as claimed in claim 3, characterized in that: The bearing support system (102) comprises an upper spandrel girder (121) arranged on two sides of the bottom of the two groups of double-spliced groove steel positioning girders (111) and a lower spandrel girder (122) arranged on two sides of the bottom of the longitudinal girder (321), wherein two ends of the upper spandrel girder (121) and two ends of the lower spandrel girder (122) are connected through hanging rods (123) and are locked and fixed through connecting nuts (112).
  5. 5. The bottom-sealing-free rapid-assembly hanging box cofferdam as claimed in claim 4, wherein: A plurality of groups of back ribs (205) are arranged on the outer walls of the integral wall plate (201) and the side panels (203) at equal intervals, and the back ribs (205) and the connecting vertical beams (114) are fixed through welding; two groups of overturning bottom plates (202) are close to each other and are provided with opening and closing ends, and semicircular protection grooves (206) are symmetrically formed in two sides of the opening and closing ends.
  6. 6. The bottom-sealing-free rapid-assembly hanging box cofferdam as claimed in claim 5, wherein: the bottom die fixed support (301) comprises a support frame (331) formed by welding a plurality of groups of support beams, the support frame (331) is provided with two groups, and is correspondingly arranged on the top side of the longitudinal beam (321), the two groups of support frames (331) are mutually close to one side and symmetrically provided with two groups of annular support beams (332), and two ends of the overturning bottom plate (202) are parallel and level with two ends of the support frame (331).
  7. 7. The bottom-sealing-free rapid-assembly hanging box cofferdam as claimed in claim 6, wherein: The overturning structure (302) comprises a plurality of groups of supports (315) welded on the bottom sides of two groups of longitudinal beams (321), a rotating rod (312) is arranged between the plurality of groups of supports (315), an engagement gear (314) is arranged on the outer wall of the rotating rod (312), the engagement gears (314) on the two sides are meshed with each other, the supports (315) and the engagement gears (314) are arranged in a staggered mode, rotating rods (311) are arranged at two ends of the rotating rod (312), and a fixing plate (313) is arranged on the top sides of the two groups of rotating rods (311) close to the longitudinal beams (321).
  8. 8. The bottom-sealing-free rapid-assembly hanging box cofferdam as set forth in claim 7, wherein: Two groups of supporting frames (331) and annular supporting beams (332) are close to each other and are provided with rubber water stop bars on the inner wall of one side, and water expansion water stop bars are arranged on the other three sides of the supporting frames (331).
  9. 9. The method for installing the bottom-sealing-free rapid-assembly suspended box cofferdam is characterized in that: The method comprises the following steps: Step 1, after the construction platform is erected, an upper spandrel girder (121) is erected on the construction platform, and after the plane position of the upper spandrel girder (121) is adjusted, two ends of the upper spandrel girder (121) are bolted on the construction platform; Step 2, sequentially welding the integral wallboard (201) and the side panel (203), sequentially welding a plurality of groups of back ribs (205) on the outer side walls of the integral wallboard (201) and the side panel (203), welding a plurality of groups of hinges (204) on one side of a turnover bottom plate (202), attaching the turnover bottom plate (202) to the bottom side of the integral wallboard (201) by using hoisting equipment, and welding the other end of the hinges (204) on the integral wallboard (201) to finish the installation of a template system (20); Welding a connecting vertical beam (114) on a back rib (205) on one side of an integral wallboard (201), welding two groups of connecting vertical beams (114), welding a double-spliced groove steel positioning beam (111) on the top side of the connecting vertical beam (114), and erecting the connecting vertical beam on an upper spandrel beam (121), installing a connecting compression bar (117) between the two groups of connecting vertical beams (114), fixing a threaded steel pull rod (115) by utilizing a pull rod nut (116) after penetrating the connecting vertical beam (114) and the connecting compression bar (117), and forming self-locking by horizontal pull pressure generated between the two connecting vertical beams (114), thereby completing the installation of a positioning support system (101); Step 4, welding and fixing a supporting frame (331) and an annular supporting beam (332) corresponding to the overturning bottom plate (202), welding longitudinal beams (321) on two sides of the bottom of the supporting frame (331), sequentially welding a plurality of supports (315) at the positions of the longitudinal beams (321) according to the design, correspondingly welding a plurality of meshing gears (314) on the rotating rods (312) after the rotating rods (312) pass through holes of the supports (315), and welding rotating rods (311) on two ends of the rotating rods (312) to finish the installation of the weir bottom overturning system (30); Step 5, hoisting the installed template system (20), the weir bottom overturning system (30) and the positioning support system (101) on an upper spandrel girder (121), fixing a connecting screw rod (113) by using a connecting screw cap (112) after penetrating through the double-spliced-groove steel positioning girder (111) and the upper spandrel girder (121), fixing the double-spliced-groove steel positioning girder (111) and the upper spandrel girder (121) together, effectively transmitting force, supporting a lower lowering spandrel girder (122) under a longitudinal girder (321), adjusting elevation of a cofferdam of a hanging box, and connecting the upper spandrel girder (121) and the lower spandrel girder (122) by using the connecting screw cap (112); And 6, respectively sleeving two groups of fixing plates (313) on two groups of rotating rods (311) at two sides, so that the engagement gears (314) at two sides are kept in an engaged state and do not rotate, and the overturning bottom plate (202) is ensured to be in a closed state.
  10. 10. The method for installing the bottom-sealing-free rapid-assembly suspended box cofferdam is characterized in that: In the step 4, a rubber water stop strip is inserted into one side of the supporting frame (331) connected with the annular supporting beam (332), and water expansion water stop strips are inserted into the other three sides.

Description

Bottom-sealing-free rapid-assembly hanging box cofferdam and installation method Technical Field The invention relates to the technical field of lifting cofferdams, in particular to a bottom-sealing-free rapid-assembly lifting box cofferdam and an installation method. Background The method for constructing the beam between the columns under the water surface comprises the steps of adopting a mode of constructing a suspended box cofferdam and an underwater steel cofferdam to ensure a water-free operation environment, wherein the common suspended box cofferdam construction method adopts a mode of pouring underwater concrete for bottom sealing, the concrete for bottom sealing and a suspended box bottom die are put into once, the cost is high, the construction period is long, the construction method adopting the underwater steel cofferdam can be used for construction by inserting steel sheet piles and lowering single-wall or double-wall steel cofferdams, the geological requirements on a river bed are high, the adaptability is limited, the construction period is long, and the cost is high. As described above, the prior art of tie beams between construction columns under water surface is complex in process, troublesome in construction operation and higher in cost, so that the tie beams with low position and small size are combined with project characteristics, and the underwater suspended box cofferdam which is simple and convenient to construct, economical and capable of being recycled is designed pertinently, and the problem is solved. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide the suspended box cofferdam which is economical, effectively shortens the construction period, reduces the potential safety hazard and is convenient to disassemble and assemble. To achieve the purpose, the invention adopts the following technical scheme: the invention provides a bottom-sealing-free rapid assembly hanging box cofferdam, which comprises a hanging system, a template system and a weir bottom overturning system, wherein the hanging system is positioned around the template system, and the template system is positioned at the top side of the weir bottom overturning system; The hanging system comprises a positioning support system welded around the template system, and two sides of the bottom of the positioning support system are provided with bearing support systems; the template system comprises two groups of integral wall plates and side plates which are connected with each other in sequence, the bottom sides of the two groups of integral wall plates are correspondingly connected with a turnover bottom plate through hinges in a rotating way, and the turnover bottom plate is positioned on the top side of the weir bottom turnover system; The weir bottom overturning system comprises a bottom die fixed support welded on the bottom side of an overturning bottom plate, and an overturning structure is arranged on the bottom side of the bottom die fixed support through a longitudinal beam. The positioning and supporting system comprises connecting vertical beams arranged on one sides of two groups of integral wallboards, which are far away from each other, a double-spliced groove steel positioning beam is arranged on the top side of the connecting vertical beams of the same two groups, a connecting screw rod is arranged between the double-spliced groove steel positioning beam and the connecting vertical beams, connecting nuts are connected with two ends of the connecting screw rod in a threaded manner to fix the connection between the double-spliced groove steel positioning beam and the connecting vertical beams, a tension and compression rod piece is arranged between the connecting vertical beams on one sides of the two groups of integral wallboards, which are far away from each other, and the tension and compression rod piece is arranged above the two groups of integral wallboards. The preferable technical scheme of the invention is that the tension rod piece comprises a connecting compression rod for connecting two groups of connecting vertical beams, wherein screw-thread steel tension rods are arranged at two ends of the connecting compression rod, penetrate through the connecting vertical beams and are fixed through tension rod nuts. The preferable technical scheme of the invention is that the bearing support system comprises an upper bearing beam arranged at two sides of the bottom of the two groups of double-spliced groove steel positioning beams and a lower bearing beam arranged at two sides of the bottom of the longitudinal beam, wherein the two ends of the upper bearing beam and the two ends of the lower bearing beam are connected through a suspender and are locked and fixed through connecting nuts. The invention has the preferable technical scheme that a plurality of groups of back edges are arranged on the outer walls of the integral wall plate and the side pan