Combined cofferdam and cofferdam module easy to splice

Abstract

The present application relates to a combined cofferdam and a cofferdam module that is easy to splice. The cofferdam module includes a cofferdam box, a first locking joint and a second locking joint. The second end of the cofferdam module located above is plugged into the plug-in space of the plug-in unit of the cofferdam module located below and limitedly matched, and each cofferdam module is spliced ​​up and down to form a cofferdam module. After a cofferdam module is lowered, the cofferdam module of another cofferdam module and the cofferdam module of the adjacent cofferdam module are plugged together through the first locking joint and the second locking joint to splice into a combined cofferdam. No welding is required during the splicing process, and the size and weight of each cofferdam module are small, and the load-bearing requirements for the lifting equipment are low. When dismantling, it is only necessary to lift the cofferdam modules one by one, and then disassemble the cofferdam modules of the cofferdam module through the plug-in unit and the matching parts. No cutting is required during the disassembly process. The structure of the cofferdam module after dismantling is complete, which effectively improves the construction efficiency and reduces the construction cost.

Description

Technical Field

[0001] The present application relates to the technical field of cofferdams, and in particular to a combined cofferdam and a cofferdam module thereof which are easy to splice. Background Art

[0002] At present, the traditional steel cofferdam construction technology mainly adopts the method of overall assembly and lowering. First, an operating platform needs to be built in the river channel, and then the overall assembly of the steel cofferdam is carried out on the platform. After a full circle of assembly is completed, it is lowered to the designated location, and the assembly of subsequent sections is continued on the lowered steel cofferdam.

[0003] However, during the assembly process of traditional steel cofferdams, they need to be welded, assembled and lowered in sections on site, which not only makes the operation process complicated, but also places high demands on the quality of the welds and the welding process. At the same time, since the manufactured steel cofferdam is an integral structure, underwater cutting operations are required during dismantling. This process is not only prone to safety accidents, but also not conducive to the secondary transportation and utilization of the steel cofferdam, resulting in a time-consuming and labor-intensive dismantling process and increased construction costs. Summary of the invention

[0004] Based on this, it is necessary to provide a combined cofferdam and cofferdam module that are easy to splice and dismantle to reduce construction costs in order to address the above problems.

[0005] A cofferdam module of a combined cofferdam that is easy to splice, the cofferdam module includes a cofferdam box, a first locking joint and a second locking joint, the cofferdam box includes a first docking wall panel and a second docking wall panel, the first docking wall panel and the second docking wall panel are respectively used to dock with adjacent cofferdam modules; the upper and lower ends of the cofferdam box are respectively the first end and the second end, a plug-in unit is provided on the end surface of the first end, a plug-in space is formed in the plug-in unit, and a matching piece is provided on the outer wall of the second end; in two cofferdam modules adjacent in the height direction, the second end of the cofferdam module located above can be plugged into the plug-in space of the plug-in unit of the cofferdam module located below, so that the matching piece and the plug-in unit are limitedly matched, and the plug-in unit is used to limit the movement of the matching piece along the height direction of the cofferdam box; the first locking joint is provided on the first docking wall panel; the second locking joint is provided on the second docking wall panel.

[0006] In one embodiment, the side wall opening of the plug-in unit forms a plug-in interface connected to the plug-in space, the number of the mating parts is two, and limiting grooves are respectively formed on the opposite side walls of the plug-in space, and the limiting grooves pass through the plug-in interface. The second end of the cofferdam module located above can be plugged into the plug-in space of the plug-in unit of the cofferdam module located below through the plug-in interface, so that the two mating parts are respectively plugged into the limiting grooves of the plug-in unit of the cofferdam module located below through the plug-in interface.

[0007] In one embodiment, the plug-in unit includes a connecting plate and two plug-in plates, the connecting plate is arranged above the second docking wall plate, the two plug-in plates are arranged relatively spaced apart, one side edge of the two plug-in plates are respectively connected to the opposite two side edges of the connecting plate, the other opposite side edges of the two plug-in plates are spaced apart to form the plug-in interface, and the connecting plate and the two plug-in plates enclose the plug-in space; the number of the mating parts is consistent with the number of the plug-in plates, the limiting groove is formed on the plug-in plate, and the second end of the cofferdam module located above can be plugged into the plug-in space of the plug-in unit of the cofferdam module located below by the plug-in interface, so that the mating parts and the plug-in plates are limitedly matched.

[0008] In one embodiment, the length of the first locking joint is consistent with the length of the first docking wall panel, and the two end surfaces of the first locking joint are flush with the opposite two side edges of the first docking wall panel arranged in the height direction, the length of the second locking joint is consistent with the length of the first locking joint, and the upper end surface of the second locking joint is flush with the side of the connecting plate away from the second docking wall panel.

[0009] In one embodiment, the cofferdam module also includes a first locking unit and a second locking unit. The first locking unit is arranged on the outer wall of the plug-in unit and is located close to the side of the plug-in unit away from the cofferdam box body. The second locking unit is arranged on the outer wall of the second end of the cofferdam box body and is located above the mating piece. In two adjacent cofferdam modules in the height direction, the second locking unit of the cofferdam module located above can be locked with the first locking unit of the cofferdam module located below.

[0010] In one embodiment, the first locking unit includes a first positioning member, a first rotating member and a first locking member, the first positioning member is a semi-conical structure, the first rotating member is a semi-circular arc structure, the first rotating member is clamped on the outer arc surface of the first positioning member and can rotate around the center of the first positioning member, the first locking member is provided on one of the side of the first positioning member facing the first rotating member and the inner wall of the first rotating member facing the first positioning member, and the first locking hole is opened on the other; the second locking unit includes a second positioning member, and the second positioning member is a semi-conical structure; in the locked state, the first rotating member of the first locking unit of the cofferdam module located below is partially located on the first positioning member, and the other part is rotated to the second positioning member, so that the first locking member is inserted into the first locking hole.

[0011] In one embodiment, the first locking unit includes a first positioning member, which is a semi-conical structure; the second locking unit includes a second positioning member, a second rotating member and a second locking member, the second positioning member is a semi-conical structure, the second rotating member is a semi-circular arc structure, the second rotating member is clamped on the outer arc surface of the second positioning member and can rotate around the center of the second positioning member, the second locking member is provided on one of the side of the second positioning member facing the second rotating member and the inner wall of the second rotating member facing the second positioning member, and the second locking member is provided on the other; wherein, in the locked state, part of the second rotating member of the second locking unit of the cofferdam module located at the top is located on the second positioning member, and the other part is rotated to the first positioning member, so that the second locking member is inserted into the second locking hole.

[0012] In one embodiment, the first locking member is provided on the side of the first positioning member facing the first rotating member, the first locking hole is provided on the inner wall of the first rotating member, the third locking hole is also opened on the side of the first positioning member facing the first rotating member, and the fourth locking hole is also opened on the inner wall of the first rotating member, and the direction of the first locking hole toward the fourth locking hole is consistent with the direction of the third locking hole toward the first locking member, and both are locking directions; the second locking hole is provided on the side of the second positioning member facing the second rotating member, the second locking member is provided on the inner wall of the second rotating member, and the third locking member is also provided on the inner wall of the second rotating member, and the fourth locking member is also provided on the side of the second positioning member facing the second rotating member, and the direction of the second locking member toward the third locking member and the direction of the fourth locking member toward the second locking hole are both the locking directions; in a locked state, the fourth locking member of the second positioning member is inserted into the fourth locking hole of the first rotating member, and the third locking member of the second rotating member is inserted into the third locking hole of the first positioning member.

[0013] In one embodiment, the number of the first locking joints is two, the two first locking joints are both arranged on the first docking wall panel, and the two first locking joints are arranged at intervals along the width direction of the first docking wall panel; the number of the second locking joints is two, the two second locking joints are both arranged on the second docking wall panel, and the two second locking joints are arranged at intervals along the width direction of the second docking wall panel; each first locking joint of one cofferdam module is correspondingly connected with each second locking joint of another cofferdam module adjacent in the horizontal direction, and the two adjacent cofferdam modules form a water-stop space through the cooperation of the first locking joint and the second locking joint.

[0014] A combined cofferdam that is easy to splice, the combined cofferdam includes a plurality of cofferdam modules as described above, wherein in two upper and lower adjacent cofferdam modules, the second end of the upper cofferdam module can be plugged into the plug-in space of the plug-in unit of the lower cofferdam module, so that the matching piece and the plug-in unit can be limitedly matched; in two left and right adjacent cofferdam modules, the first locking joint of one cofferdam module corresponds to the second locking joint of the other adjacent cofferdam module.

[0015] In one embodiment, the cofferdam modules spliced ​​up and down form a cofferdam module; when two adjacent cofferdam modules are spliced ​​left and right, the seam of the first locking joints of two adjacent cofferdam modules of one cofferdam module is aligned with the second locking joint of a cofferdam module of another cofferdam module, and / or the seam of the second locking joints of two adjacent cofferdam modules of one cofferdam module is aligned with the first locking joint of a cofferdam module of another cofferdam module.

[0016] Compared with the prior art, the combined cofferdam and cofferdam module of the present application that are easy to splice have the following beneficial effects: during construction, the second end of the cofferdam module located at the top is plugged into the plug-in space of the plug-in unit of the cofferdam module located at the bottom, so that the matching piece and the plug-in unit are limitedly matched, and each cofferdam module is spliced ​​together from top to bottom to form a cofferdam module. After a cofferdam module is lowered to a preset position, the cofferdam module of another cofferdam module is plugged together with the cofferdam module of the adjacent cofferdam module through the first locking joint and the second locking joint, thereby realizing the splicing of two adjacent cofferdam modules until they are spliced ​​together to form a combined cofferdam. During the entire splicing process, no welding is required, and the size and weight of a single cofferdam module are small, which can reduce the load-bearing requirements for hoisting equipment and construction platforms. During dismantling, it is only necessary to lift the cofferdam modules one by one, and then disassemble the various cofferdam modules of a cofferdam module through the plug-in unit and the matching parts. No cutting or underwater operation is required during the entire dismantling process. The structure of the cofferdam module after dismantling is intact, and it can be reused with reduced or even no subsequent processing, which effectively improves construction efficiency and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0020] Figure 1 A schematic diagram of the structure of a cofferdam module in an embodiment Figure 1 .

[0021] Figure 2Schematic diagram of the cofferdam module structure Figure 2 .

[0022] Figure 3 This is a top view of the local structure of the cofferdam module in the spliced ​​state.

[0023] Figure 4 Schematic diagram of the cofferdam module structure Figure 3 .

[0024] Figure 5 It is a partial top view of the cofferdam module in the first embodiment.

[0025] Figure 6 It is a partial top view of the cofferdam module in the second embodiment.

[0026] Figure 7 It is a partial top view of the cofferdam module in the third embodiment.

[0027] Figure 8 It is a cross-sectional view of the first locking unit and the second locking unit in an unlocked state.

[0028] Fig. 9 It is a cross-sectional view of the first locking unit and the second locking unit in a locked state.

[0029] Fig.10 for Figure 1 Enlarged view of point A in the middle.

[0030] Description of reference numerals:

[0031] Cofferdam module 10; cofferdam box 100; first docking wall panel 110; first mounting plate 112; first splicing plate 114; second docking wall panel 120; second mounting plate 122; second splicing plate 124; plug-in unit 130; plug-in space 131; plug-in port 132; connecting plate 133; plug-in plate 134; limiting groove 135; plug-in component 136; fitting component 140; panel 150; first locking joint 200; second locking joint 300; steel pipe pile 400; first locking unit 500; first positioning member 510; first rotating member 520; first locking member 530; first locking hole 540; third locking hole 550; fourth locking hole 560; second locking unit 600; second positioning member 610; second rotating member 620; second locking member 630; second locking hole 640; third locking member 650; fourth locking member 660; water-stop space 20. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] See also Figures 1 to 3 The combined cofferdam that is easy to splice in one embodiment of the present application is formed by splicing a plurality of cofferdam modules 10, and has at least the advantages of being easy to splice, easy to dismantle and having low construction costs. Specifically, the cofferdam module 10 includes a cofferdam box 100, a first locking joint 200 and a second locking joint 300, and the cofferdam box 100 includes a first docking wall panel 110 and a second docking wall panel 120, and the first docking wall panel 110 and the second docking wall panel 120 are respectively used to dock with adjacent cofferdam modules 10. The first locking joint 200 is arranged on the first docking wall panel 110; the second locking joint 300 is arranged on the second docking wall panel 120. When splicing, in two adjacent cofferdam modules 10 on the left and right, the first locking joint 200 of one cofferdam module 10 corresponds to the second locking joint 300 of the other adjacent cofferdam module 10, and the combined cofferdam is spliced ​​to form a combined cofferdam.

[0034] In one embodiment, the number of the first locking joints 200 is two, and the two first locking joints 200 are both disposed on the first docking wall plate 110, and the two first locking joints 200 are spaced apart along the width direction of the first docking wall plate 110. The number of the second locking joints 300 is two, and the two second locking joints 300 are both disposed on the second docking wall plate 120, and the two second locking joints 300 are spaced apart along the width direction of the second docking wall plate 120. Figure 3 As shown, during splicing, each first locking joint 200 of a cofferdam module 10 is plugged into each second locking joint 300 of another adjacent cofferdam module 10, and the two adjacent cofferdam modules 10 form a water-stop space 20 through the cooperation of the first locking joint 200 and the second locking joint 300.

[0035] During construction, two cofferdam modules 10 are arranged adjacent to each other, so that the first docking wall plate 110 of one cofferdam module 10 is arranged opposite to the second docking wall plate 120 of the other cofferdam module 10, and each first locking joint 200 of one cofferdam module 10 is plugged into each second locking joint 300 of the other adjacent cofferdam module 10, and the two adjacent cofferdam modules 10 are surrounded by the cooperation of the first locking joint 200 and the second locking joint 300 to form a water-stopping space 20. By setting the cooperation of the two first locking joints 200 and the two second locking joints 300, not only can the reliability of the splicing of the two cofferdam modules 10 be improved, but also it is convenient to form the water-stopping space 20, and the water-stopping effect of the splicing position is improved.

[0036] In one embodiment, the waterstop space 20 is filled with a waterstop. By filling the waterstop space 20 with a waterstop, the waterstop effect at the joint of the two cofferdam modules 10 can be further improved, and the possibility of water seepage can be reduced. Specifically, the waterstop is a filler formed by a mixture of clay, sawdust and butter. By filling the mixture of clay, sawdust and butter, the sealing effect at the joint is improved. In other embodiments, the waterstop can also be mud mortar and / or concrete, etc. The concrete can be ordinary concrete or UHPC high-performance concrete, etc. The combined cofferdam can be changed from a temporary protective structure to a permanent protective structure, forming a permanent anti-collision structure for the bridge pier.

[0037] In this embodiment, a water stop is also filled in the space formed inside the first locking joint 200 and the second locking joint 300. By filling the water stop in the space formed inside the first locking joint 200 and the second locking joint 300, the water stop can be used to further improve the water stop effect and improve the reliability of the connection between the spliced ​​first locking joint 200 and the second locking joint 300.

[0038] In one embodiment, the cofferdam module 10 further includes a steel pipe pile 400, which is inserted into the cofferdam box 100 and fixedly connected to the inner wall of the cofferdam box 100. The steel pipe pile 400 can enhance the structural strength of the cofferdam box 100, so that the combined cofferdam can be applied in deep water or deep and large foundation pits. The cofferdam module 10 effectively combines the advantages of the steel sheet pile cofferdam and the locking steel pipe cofferdam, enhances the structural strength, and improves the applicability in complex geological and deep-water foundation construction, and is easy to splice and has good water-proof properties.

[0039] See also Figures 2 to 4In one embodiment, the first docking wall panel 110 includes two first mounting plates 112 and two first splicing plates 114. The two first mounting plates 112 are spaced apart and located on the same plane. Two first locking joints 200 are respectively arranged on the outer walls of the two first mounting plates 112. One side of each first splicing plate 114 is connected to the side of one first mounting plate 112 facing the other first mounting plate 112, and the other side is connected to the steel pipe pile 400. The outer wall surfaces of the two first splicing plates 114 form a "V"-shaped space. The V-shaped structure formed by the two first splicing plates 114 can utilize the triangle stability principle to increase the ability of the cofferdam box 100 to resist torsional deformation and reduce the possibility of torsional deformation during splicing and installation construction.

[0040] In one embodiment, the second docking wall panel 120 includes two second mounting plates 122 and two second splicing plates 124. The two second mounting plates 122 are spaced apart and located on the same plane. Two second locking joints 300 are respectively arranged on the outer walls of the two second mounting plates 122. One side of each second splicing plate 124 is connected to the side of one second mounting plate 122 facing the other second mounting plate 122, and the other side is connected to the steel pipe pile 400. The outer wall surfaces of the two second splicing plates 124 form a "V"-shaped space. The V-shaped structure formed by the two second splicing plates 124 can utilize the triangle stability principle to increase the ability of the cofferdam box 100 to resist torsional deformation and reduce the possibility of torsional deformation during splicing and installation construction.

[0041] like Figure 2 and 3 As shown, when two cofferdam modules 10 are spliced ​​together, the "V"-shaped space surrounded by the outer wall surfaces of the two first splicing plates 114 is connected to the "V"-shaped space surrounded by the outer wall surfaces of the two second splicing plates 124 to form a water-stop space 20. The two "V"-shaped spaces can increase the size of the water-stop space 20, thereby facilitating a more compact filling of the water-stop material, thereby solving the problem of narrow water-stop space and difficulty in filling water-stop fillers in the traditional solution.

[0042] See also Figures 2 to 4 In the present embodiment, in two cofferdam modules 10 adjacent in the horizontal direction, the two first locking joints 200 of one cofferdam module 10 can be respectively plugged into the two second locking joints 300 of the other cofferdam module 10 to enclose a water-stop space 20; among the first locking joints 200 and the second locking joints 300 plugged into each other, one is a "C"-shaped locking tube, and the other is a "T"-shaped steel bar or an "I"-shaped steel bar.

[0043] Specifically, the first locking joint 200 is a "C"-shaped locking joint tube, and the second locking joint 300 is a "T"-shaped steel bar or an "I"-shaped steel bar. In this embodiment, the "C"-shaped locking joint tube is further filled with a water stop.

[0044] like Figure 5 As shown, in the first embodiment, the first locking joint 200 and the second locking joint 300 of a cofferdam module 10 are both "C"-shaped locking tubes, so the first locking joint 200 and the second locking joint 300 of the two adjacent cofferdam modules 10 spliced ​​with the cofferdam module 10 can both be "T"-shaped steel bars or "I"-shaped steel bars.

[0045] like Figure 6 As shown, in the second embodiment, when the cofferdam module 10 is used at the corner of the combined cofferdam, the second docking wall plate 120 can be arranged at a right angle to the first docking wall plate 110. Figure 7 As shown, in the third embodiment, when the cofferdam module 10 is used at the corner of the combined cofferdam, the cofferdam box 100 can be arranged into an "L"-shaped structure, and the first locking joint 200 and the second locking joint 300 are respectively arranged at the two ends of the "L"-shaped structure.

[0046] See also Figure 1 and Figure 2 In one embodiment, the upper and lower ends of the cofferdam box 100 are respectively the first end and the second end, a plug-in unit 130 is arranged on the end surface of the first end, a plug-in space 131 is formed in the plug-in unit 130, and a matching piece 140 is arranged on the outer wall of the second end; in two cofferdam modules 10 adjacent in the height direction, the second end of the cofferdam module 10 located at the upper side can be plugged into the plug-in space 131 of the plug-in unit 130 of the cofferdam module 10 located at the lower side, so that the matching piece 140 and the plug-in unit 130 are limitedly matched, and the plug-in unit 130 is used to limit the movement of the matching piece 140 along the height direction of the cofferdam box 100.

[0047] During construction, of the two adjacent cofferdam modules 10, the second end of the upper cofferdam module 10 is plugged into the plug-in space 131 of the plug-in unit 130 of the lower cofferdam module 10, so that the matching piece 140 and the plug-in unit 130 are limited and matched, and each cofferdam module 10 is spliced ​​together from top to bottom to form a cofferdam module. After one cofferdam module is lowered to a preset position, the cofferdam module 10 of the other cofferdam module is plugged together with the cofferdam module 10 of the adjacent cofferdam module through the first locking joint 200 and the second locking joint 300 to realize the splicing of the two adjacent cofferdam modules until they are spliced ​​together to form a combined cofferdam. During the entire splicing process, welding is not required, and the size and weight of a single cofferdam module 10 are small, which can reduce the load-bearing requirements for hoisting equipment and construction platforms. During dismantling, it is only necessary to lift the cofferdam modules one by one, and then disassemble the cofferdam modules 10 of a cofferdam module through the plug-in unit 130 and the matching parts 140. No cutting is required during the entire dismantling process, and no underwater operations are required. The cofferdam module 10 after dismantling is structurally intact and can be reused with reduced or even no subsequent processing, which effectively improves construction efficiency and reduces construction costs.

[0048] In some embodiments, if the upper and lower cofferdam modules 10 are connected by bolt connection, on the one hand, the sealing of the joint is poor, and the connection holes of the two cofferdam modules 10 need to be aligned during splicing, which requires high installation accuracy and processing accuracy of the splicing position; on the other hand, the formed combined cofferdam is generally lowered to the preset position by vibrating hammers, and during the vibration process, it is easy to cause the bolt connection position to loosen, affecting the reliability of the connection during the lowering process and the reliability during use. The present application can effectively avoid the above problems by using the connection method of the plug-in unit 130 and the matching piece 140.

[0049] In one embodiment, the side wall opening of the plug-in unit 130 forms a plug-in port 132 connected to the plug-in space 131, and the number of the matching pieces 140 is two. The second end of the cofferdam module 10 located above can be plugged into the plug-in space 131 of the plug-in unit 130 of the cofferdam module 10 located below through the plug-in port 132, so that the two matching pieces 140 are respectively limited and matched with the opposite side walls of the plug-in space 131. By providing the plug-in port 132, it is convenient for the cofferdam module 10 to be inserted into the plug-in space 131 of another cofferdam module 10 from the side, thereby improving the convenience of assembly and splicing. Specifically, when the second end of the cofferdam module 10 located above is inserted into the plug-in space 131, the bottom wall of the cofferdam module 10 located above can abut against the cofferdam box 100 of the cofferdam module 10 located below, thereby improving the reliability of the connection.

[0050] Specifically, the plug-in unit 130 includes a connecting plate 133 and two plug-in plates 134, the two plug-in plates 134 are arranged at intervals, the connecting plate 133 is arranged above the second docking wall plate 120, one side of the two plug-in plates 134 is respectively connected to the two opposite sides of the connecting plate 133, the other opposite sides of the two plug-in plates 134 are arranged at intervals to form a plug-in interface 132, and the connecting plate 133 and the two plug-in plates 134 surround a plug-in space 131. The number of the matching pieces 140 is consistent with the number of the plug-in plates 134, and the second end of the cofferdam module 10 located above can be plugged into the plug-in space 131 of the plug-in unit 130 of the cofferdam module 10 located below through the plug-in interface 132, so that the matching piece 140 and the plug-in plate 134 are limitedly matched. The plug-in unit 130 is formed by two plug-in plates 134 and one connecting plate 133, so that the structure of the plug-in unit 130 is simple. Building structural members are generally large and heavy, and the height of a combined cofferdam is generally above 20m. The weight of a single cofferdam module 10 may reach hundreds of tons or even heavier. Therefore, a connection structure with simple structural dimensions is conducive to processing and molding, and is easy to install and connect. While ensuring the reliability of the connection, it reduces the complexity of the structural members and is conducive to the construction.

[0051] In this embodiment, the cofferdam box 100 further includes two oppositely arranged panels 150 , the first docking wall panel 110 and the second docking wall panel 120 are arranged oppositely with an interval, and the first docking wall panel 110 and the second docking wall panel 120 and the two panels 150 together form the cofferdam box 100 .

[0052] In this embodiment, the plug-in board 134 can be formed by extending the panel 150 of the cofferdam box 100, that is, the plug-in board 134 can be an integrally formed structure with the panel 150 of the cofferdam box 100. The two plug-in boards 134 are respectively extended from the two opposite panels 150 of the cofferdam box 100, and the plate is bent at the connection between the panel 150 and the plug-in board 134 to form a step supporting the upper cofferdam module 10. The connecting plate 133 can be formed by extending the second docking wall plate 120, that is, the connecting plate 133 and the second docking wall plate 120 are an integral structure. The plate is bent at the connection between the connecting plate 133 and the second docking wall plate 120 to form a step supporting the upper cofferdam module 10. By integrally forming the plug-in board 134 and the connecting board 133 with the plate forming the cofferdam box 100, not only the number of processed parts can be reduced, but also the sealing of the connection position and the structural reliability of the connection can be ensured.

[0053] In one embodiment, limiting grooves 135 are respectively formed on the opposite side walls of the plug-in space 131, and the limiting grooves 135 penetrate the plug-in interface 132, so that the matching piece 140 of the cofferdam module 10 located above can be inserted into the limiting groove 135 of the plug-in unit 130 of the cofferdam module 10 located below with its second end through the plug-in interface 132. Specifically, the limiting groove 135 is formed on the plug-in board 134. Through the cooperation of the two limiting grooves 135 and the matching piece 140, the up and down movement of the upper and lower cofferdam modules 10 can be effectively limited.

[0054] Specifically, the plug-in unit 130 also includes two connectors 136, which are respectively arranged on two plug-in boards 134, and a limiting groove 135 is formed on the connector 136. The number of mating components 140 is consistent with the number of connectors 136, and each mating component 140 can be inserted into the corresponding limiting groove 135 through the plug-in interface 132.

[0055] In this embodiment, the plug-in component 136 can be a "C"-shaped locking tube, which is arranged on the outer wall surface of the plug-in board 134, and the opening of the "C"-shaped locking tube passes through the plug-in board 134 and is connected to the plug-in space 131, and a limiting groove 135 is formed in the "C"-shaped locking tube. The matching component 140 can be a "T"-shaped steel bar or an "I"-shaped steel bar, and the "T"-shaped steel bar or the "I"-shaped steel bar is inserted in the "C"-shaped locking tube. Since the first locking joint 200 and the second locking joint 300 are respectively a "C"-shaped locking tube and a "T"-shaped steel bar or an "I"-shaped steel, the plug-in component 136 and the matching component 140 can be directly formed using existing structural parts, further reducing the processing difficulty and processing cost.

[0056] In one embodiment, the length of the first locking joint 200 is consistent with the length of the first docking wall plate 110, and the two end surfaces of the first locking joint 200 are flush with the two opposite sides of the first docking wall plate 110 arranged in the height direction, and the length of the second locking joint 300 is consistent with the length of the first locking joint 200, and the upper end surface of the second locking joint 300 is flush with the upper surface of the plug-in unit 130. Specifically, the upper end surface of the second locking joint 300 is flush with the side of the connecting plate 133 away from the second docking wall plate 120.

[0057] When splicing, the cofferdam modules 10 spliced ​​up and down form a cofferdam module. When two adjacent cofferdam modules are spliced ​​left and right, the joint of the first locking joints 200 of the two adjacent cofferdam modules 10 of one cofferdam module is aligned with the second locking joint 300 of one cofferdam module 10 of the other cofferdam module, and / or the joint of the second locking joints 300 of the two adjacent cofferdam modules 10 of one cofferdam module is aligned with the first locking joint 200 of one cofferdam module 10 of the other cofferdam module.

[0058] In the two cofferdam modules 10 spliced ​​up and down, one cofferdam module 10 can be separated from the other cofferdam module 10 by the opening direction of the plug interface 132, but when the composed cofferdam modules are spliced ​​together, for the middle cofferdam module, the joint of the first locking joint 200 of the two adjacent cofferdam modules 10 of the middle cofferdam module is aligned with the second locking joint 300 of the cofferdam module 10 on one side, and the joint of the second locking joint 300 of the two adjacent cofferdam modules 10 of the middle cofferdam module is aligned with the first locking joint 200 of the cofferdam module 10 on the other side, and the cofferdam module in the middle is restricted from moving left and right by the cofferdam modules on both sides. The cofferdam modules are finally spliced ​​to form an annular structure or a square closed loop structure connected end to end, which restricts the left and right movement of each cofferdam module 10 as a whole. The top of the assembled cofferdam will not have different heights due to the misaligned joint arrangement, nor will it be necessary to set cofferdam modules 10 of different heights due to the misaligned joint arrangement.

[0059] See also Figure 1 , Figures 8 to 10 In one embodiment, the cofferdam module 10 further includes a first locking unit 500 and a second locking unit 600. The first locking unit 500 is arranged on the outer wall of the plug-in unit 130 and is located near the side of the plug-in unit 130 away from the cofferdam box 100. The second locking unit 600 is arranged on the outer wall of the second end of the cofferdam box 100 and is located above the matching piece 140. In the two adjacent cofferdam modules 10 in the height direction, the second locking unit 600 of the cofferdam module 10 located at the upper side can be locked with the first locking unit 500 of the cofferdam module 10 located at the lower side. When the upper and lower cofferdam modules 10 are spliced ​​together, the two cofferdam modules 10 are locked together by the first locking unit 500 and the second locking unit 600 to prevent the upper and lower cofferdam modules 10 from being separated during the lowering process.

[0060] In one embodiment, the first locking unit 500 includes a first positioning member 510, and the first positioning member 510 is a semi-conical structure. The second locking unit 600 includes a second positioning member 610, a second rotating member 620 and a second locking member 630. The second positioning member 610 is a semi-conical structure, and the second rotating member 620 is a semi-circular arc structure. The second rotating member 620 is clamped on the outer arc surface of the second positioning member 610 and can rotate around the center of the second positioning member 610. The second positioning member 610 faces the second rotating member 620 and the second rotating member 620 faces the inner wall of the second positioning member 610. One of the two is provided with the second locking member 630, and the other is provided with a second locking hole 640. In the locked state, part of the second rotating member 620 of the second locking unit 600 of the cofferdam module 10 located at the top is located on the second positioning member 610, and the other part rotates to the first positioning member 510, so that the second locking member 630 can be inserted into the second locking hole 640.

[0061] like Fig. 9 As described above, in the locked state, the second rotating member 620 is located on the side of the first positioning member 510 and the second positioning member 610 facing the plug-in port 132, and the second rotating member 620 is locked on the second positioning member 610 by the second locking member 630, thereby limiting the left and right movement of the upper and lower cofferdam modules 10. In this embodiment, the upper surface of the first positioning member 510 can be flush with the upper surface of the plug-in unit 130. When spliced ​​together, the upper surface of the first positioning member 510 is aligned with or directly connected to the lower surface of the second positioning member 610.

[0062] In this embodiment, the first locking unit 500 further includes a first rotating member 520 and a first locking member 530. The first rotating member 520 is a semicircular arc structure. The first rotating member 520 is clamped on the outer arc surface of the first positioning member 510 and can rotate around the center of the first positioning member 510. The first positioning member 510 faces the first rotating member 520 and the first rotating member 520 faces the inner wall of the first positioning member 510. One of the two is provided with the first locking member 530, and the other is provided with the first locking hole 540. In the locked state, part of the first rotating member 520 of the first locking unit 500 of the cofferdam module 10 located at the bottom is located on the first positioning member 510, and the other part rotates to the second positioning member 610, so that the first locking member 530 is inserted into the first locking hole 540.

[0063] like Fig. 9 As described above, in the locked state, part of the first rotating member 520 of the first locking unit 500 of the cofferdam module 10 located at the bottom is located on the first positioning member 510, and the other part is rotated to the second positioning member 610. The cooperation between the first rotating member 520 and the second rotating member 620 improves the reliability of restricting the left and right movements of the upper and lower cofferdam modules 10.

[0064] In one embodiment, a first locking member 530 is provided on the side of the first positioning member 510 facing the first rotating member 520, a first locking hole 540 is provided on the inner wall of the first rotating member 520, a third locking hole 550 is also provided on the side of the first positioning member 510 facing the first rotating member 520, a fourth locking hole 560 is also provided on the inner wall of the first rotating member 520, the direction of the first locking hole 540 toward the fourth locking hole 560 is consistent with the direction of the third locking hole 550 toward the first locking member 530, and both are locking directions c. A second locking hole 640 is provided on the side of the second positioning member 610 facing the second rotating member 620, a second locking member 630 is provided on the inner wall of the second rotating member 620, a third locking member 650 is also provided on the inner wall of the second rotating member 620, a fourth locking member 660 is also provided on the side of the second positioning member 610 facing the second rotating member 620, and the direction of the second locking member 630 toward the third locking member 650 and the direction of the fourth locking member 660 toward the second locking hole 640 are both the locking direction c. Fig. 9 As shown, in the locked state, the first locking member 530 is inserted into the first locking hole 540, the fourth locking member 660 of the second positioning member 610 is inserted into the fourth locking hole 560 of the first rotating member 520, the second locking member 630 is inserted into the second locking hole 640, and the third locking member 650 of the second rotating member 620 is inserted into the third locking hole 550 of the first positioning member 510.

[0065] By arranging the third locking member 650 to cooperate with the third locking hole 550 , and the fourth locking member 660 to cooperate with the fourth locking hole 560 , the reliability of locking the upper and lower cofferdam modules 10 can be further improved.

[0066] In this embodiment, the first locking member 530, the second locking member 630, the third locking member 650 and the fourth locking member 660 have the same structure and all include an elastic member and a telescopic member. Taking the first locking member 530 as an example, the elastic member can provide elastic force for the telescopic member to move toward the first rotating member 520. When the first locking hole 540 rotates to a position aligned with the first locking member 530, the elastic member drives the telescopic member to pop out into the first locking hole 540, locking the first positioning member 510 and the first rotating member 520. In other embodiments, the first locking member 530, the second locking member 630, the third locking member 650 and the fourth locking member 660 can also be different other structures as long as they can achieve mutual locking.

[0067] The combined cofferdam formed by splicing the cofferdam modules 10 mentioned above combines the advantages of steel sheet pile cofferdams and locking steel pipe cofferdams. It has high structural rigidity and is suitable for deep foundation pits or deeper waters. The cofferdam box 100 formed by welding steel pipes and steel plates has low manufacturing difficulty and is easy to realize factory production and assembly installation. The double CT locking joint reduces the requirements for insertion accuracy and facilitates water stopping. During splicing and installation, there is no need for on-site welding, which reduces the risk of high-altitude welding operations. During hoisting, no large floating hoisting equipment is required, which reduces the safety risk of occupying the waterway. During dismantling, there is no need for underwater cutting operations. The structure of the cofferdam module 10 after dismantling is intact, which is convenient for reuse, effectively improving construction efficiency and reducing construction costs.

[0068] In the description of the present application, it should be understood that if the terms "first" and "second" appear, these terms are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0070] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cofferdam module of a combined cofferdam that is easy to splice, characterized in that: The cofferdam module comprises: A cofferdam box, the cofferdam box comprising a first docking wall plate and a second docking wall plate, the first docking wall plate and the second docking wall plate are respectively used to dock with adjacent cofferdam modules; the upper and lower ends of the cofferdam box are respectively a first end and a second end, a plug-in unit is arranged on the end surface of the first end, a plug-in space is formed in the plug-in unit, and a matching piece is arranged on the outer wall of the second end; in two cofferdam modules adjacent in the height direction, the second end of the cofferdam module located at the upper end can be plugged into the plug-in space of the plug-in unit of the cofferdam module located at the lower end, so that the matching piece and the plug-in unit are limitedly matched, and the plug-in unit is used to limit the movement of the matching piece along the height direction of the cofferdam box; A first locking joint and a second locking joint, wherein the first locking joint is arranged on the first docking wall plate; the second locking joint is arranged on the second docking wall plate; the length of the first locking joint is consistent with the length of the first docking wall plate, and the two end surfaces of the first locking joint are flush with the two opposite sides of the first docking wall plate arranged in the height direction, the length of the second locking joint is consistent with the length of the first locking joint, and the upper end surface of the second locking joint is flush with the upper surface of the plug-in unit; A first locking unit and a second locking unit, the first locking unit is arranged on the outer wall of the plug-in unit and is located close to the side of the plug-in unit away from the cofferdam box body, the second locking unit is arranged on the outer wall of the second end of the cofferdam box body and is located above the matching piece, in two adjacent cofferdam modules in the height direction, the second locking unit of the cofferdam module located above can be locked with the first locking unit of the cofferdam module located below.

2. The cofferdam module according to claim 1, characterized in that: The side wall opening of the plug-in unit forms a plug-in interface connected to the plug-in space, the number of the mating parts is two, and limiting grooves are respectively formed on the opposite side walls of the plug-in space, and the limiting grooves pass through the plug-in interface. The second end of the cofferdam module located above can be plugged into the plug-in space of the plug-in unit of the cofferdam module located below through the plug-in interface, so that the two mating parts are respectively plugged into the limiting grooves of the plug-in unit of the cofferdam module located below through the plug-in interface.

3. The cofferdam module according to claim 2, characterized in that: The plug-in unit includes a connecting plate and two plug-in plates, the connecting plate is arranged above the second docking wall plate, the two plug-in plates are arranged relatively spaced apart, one side edge of the two plug-in plates are respectively connected to the two opposite side edges of the connecting plate, the other opposite side edges of the two plug-in plates are spaced apart to form the plug-in interface, and the connecting plate and the two plug-in plates enclose the plug-in space; the number of the mating pieces is consistent with the number of the plug-in plates, the limiting groove is formed on the plug-in plate, and the second end of the cofferdam module located above can be plugged into the plug-in space of the plug-in unit of the cofferdam module located below by the plug-in interface, so that the mating piece and the plug-in plate are limitedly matched.

4. The cofferdam module according to claim 3, characterized in that: The upper end surface of the second locking joint is flush with the side of the connecting plate away from the second docking wall plate.

5. The cofferdam module according to any one of claims 2 to 4, characterized in that: The first locking unit comprises a first positioning member, a first rotating member and a first locking member, the first positioning member is a semi-conical structure, the first rotating member is a semi-circular arc structure, the first rotating member is clamped on the outer arc surface of the first positioning member and can rotate around the center of the first positioning member, the first locking member is arranged on one of the side of the first positioning member facing the first rotating member and the inner wall of the first rotating member facing the first positioning member, and the first locking member is arranged on the other; the second locking unit comprises a second positioning member, and the second positioning member is a semi-conical structure; in the locked state, the first rotating member of the first locking unit of the cofferdam module located below is partially located on the first positioning member, and the other part is rotated to the second positioning member, so that the first locking member is inserted into the first locking hole; and / or The first locking unit includes a first positioning member, which is a semi-conical structure; the second locking unit includes a second positioning member, a second rotating member and a second locking member, the second positioning member is a semi-conical structure, the second rotating member is a semi-circular arc structure, the second rotating member is clamped on the outer arc surface of the second positioning member and can rotate around the center of the second positioning member, the second locking member is provided on one of the side of the second positioning member facing the second rotating member and the inner wall of the second rotating member facing the second positioning member, and the second locking member is provided on the other; wherein, in the locked state, part of the second rotating member of the second locking unit of the cofferdam module located at the top is located on the second positioning member, and the other part is rotated to the first positioning member, so that the second locking member is passed through the second locking hole.

6. The cofferdam module according to claim 5, characterized in that: The first locking piece is provided on a side of the first positioning piece facing the first rotating piece, the first locking hole is provided on an inner wall of the first rotating piece, a third locking hole is further provided on a side of the first positioning piece facing the first rotating piece, a fourth locking hole is further provided on the inner wall of the first rotating piece, a direction of the first locking hole toward the fourth locking hole is consistent with a direction of the third locking hole toward the first locking piece, and both are locking directions; the second locking hole is provided on a side of the second positioning piece facing the second rotating piece, the second locking piece is provided on an inner wall of the second rotating piece, a third locking piece is further provided on the inner wall of the second rotating piece, a fourth locking piece is further provided on a side of the second positioning piece facing the second rotating piece, a direction of the second locking piece toward the third locking piece and a direction of the fourth locking piece toward the second locking hole are both the locking directions; In the locked state, the fourth locking member of the second positioning member is inserted into the fourth locking hole of the first rotating member, and the third locking member of the second rotating member is inserted into the third locking hole of the first positioning member.

7. The cofferdam module according to any one of claims 1 to 4, characterized in that: The number of the first locking joints is two, and the two first locking joints are both arranged on the first docking wall plate, and the two first locking joints are arranged at intervals along the width direction of the first docking wall plate; the number of the second locking joints is two, and the two second locking joints are both arranged on the second docking wall plate, and the two second locking joints are arranged at intervals along the width direction of the second docking wall plate; Each first locking joint of a cofferdam module is plugged into each second locking joint of another cofferdam module adjacent in the horizontal direction, and two adjacent cofferdam modules form a water-stop space through the cooperation of the first locking joint and the second locking joint.

8. A combined cofferdam that is easy to splice, characterized in that: The combined cofferdam includes a plurality of cofferdam modules as described in any one of claims 1 to 7, wherein the second end of the upper cofferdam module of two adjacent cofferdam modules can be plugged into the plug-in space of the plug-in unit of the lower cofferdam module so that the mating piece and the plug-in unit can be limitedly matched; and the first locking joint of one cofferdam module is plugged into the second locking joint of the other adjacent cofferdam module of two adjacent cofferdam modules on the left and right.

9. The easily assembled combined cofferdam according to claim 8, characterized in that: The cofferdam modules spliced ​​up and down form a cofferdam module; when two adjacent cofferdam modules are spliced ​​left and right, the seam of the first locking joints of the two adjacent cofferdam modules of one cofferdam module is aligned with the second locking joint of a cofferdam module of another cofferdam module, and / or the seam of the second locking joints of the two adjacent cofferdam modules of one cofferdam module is aligned with the first locking joint of a cofferdam module of another cofferdam module.

Images