Double-layer steel sheet pile cofferdam structure of river channel

Abstract

A double-layer steel sheet pile cofferdam structure of a river channel comprises a closed-loop enclosure structure, enclosure purlins are arranged on the inner side of the enclosure structure along the circumference, reinforcing supports are arranged at all corners of the inner sides of the enclosure purlins, and supporting beams are fixedly connected between the two opposite side faces of the inner sides of the enclosure purlins. The fence structure is formed by connecting a plurality of double-layer bent steel sheet pile groups, a plurality of double-layer U-shaped steel sheet pile groups and a plurality of double-layer composite steel sheet pile groups. According to the fence structure, the inwards-bent lock catches and the outwards-bent lock catches are connected in an inserted mode, so that sealing between the steel plate pile sets is tighter, the steel plate pile sets are connected in a fastened mode through the long screws and the short screws, connection between steel plates is more stable and firmer, and the fence structure formed after the steel plate pile sets are connected is filled with water absorption sponge or sandy soil. And the waterproof effect can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a double-layer steel sheet pile cofferdam structure for a river channel. Background Art

[0002] Steel sheet pile cofferdams are mainly used for foundation pit reinforcement, river, lake or ocean water retaining construction, etc. The waterproof principle of steel sheet pile cofferdams is mainly achieved through the sealing of the lock buckles between the piles. However, the waterproof effect of cofferdams in traditional technologies is not good. Although it can block most water leakage, errors are inevitable during the construction process, so it is very likely that water leakage problems will still occur. The staff needs to take further waterproof measures to prevent further leakage, which will affect the construction progress and reduce the work efficiency of the staff. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a double-layer steel sheet pile cofferdam structure for a river channel.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A double-layer steel sheet pile cofferdam structure for a river channel includes a closed-loop enclosure structure, wherein a purlin is arranged along the circumference of the inner side of the enclosure structure, a reinforcing brace is arranged at each corner of the inner side of the purlin, and a supporting beam is fixedly connected between the two opposite side surfaces of the inner side of the purlin. The enclosure structure is connected by a plurality of double-layer curved steel sheet pile groups, a plurality of double-layer U-shaped steel sheet pile groups and a plurality of double-layer composite steel sheet pile groups.

[0006] The double-layer curved steel sheet pile group includes double-layer curved steel plates and a first connecting plate connecting the double-layer curved steel plates. Both sides of the double-layer curved steel plates are integrally connected with inwardly curved lock buckles.

[0007] The double-layer U-shaped steel sheet pile group includes a double-layer U-shaped steel plate and a second connecting plate connecting the double-layer U-shaped steel plates. The two side edges of the double-layer U-shaped steel plate are integrally connected with outward-bent lock buckles, and the bottom of the groove of the upper U-shaped steel plate is connected to the first square steel pipe through the third connecting plate.

[0008] A plurality of bolt holes are provided on a side of the first square steel pipe away from the third connecting plate and on the second connecting plate, and an operation port for easy operation is provided on one side of the bolt holes.

[0009] The double-layer composite steel sheet pile group includes a U-shaped steel plate and a straight steel plate. The two side edges of the U-shaped steel plate are integrally connected with outward-bending lock buckles, and the two side edges of the straight steel plate are integrally connected with inward-bending lock buckles. A second square steel pipe is connected to the middle of one side of the straight steel plate facing the U-shaped steel plate, and the bottom of the groove of the U-shaped steel plate is connected to the second square steel pipe through a fourth connecting plate.

[0010] A plurality of circular bolt holes are provided on two side surfaces of the second square steel pipe parallel to the fourth connecting plate, and an operation port for easy operation is provided on one side of the circular bolt hole.

[0011] The double-layer curved steel sheet pile group and the double-layer composite steel sheet pile group, the positive and negative double-layer composite steel sheet pile group, the double-layer composite steel sheet pile group and the double-layer U-shaped steel sheet pile group, the positive and negative double-layer U-shaped steel sheet pile group, and the double-layer U-shaped steel sheet pile group are detachably connected by the inner bending lock and the outer bending lock respectively. The adjacent double-layer composite steel sheet pile groups are connected by a long screw passing through the bolt holes on the second square steel pipe and locked by a nut. The adjacent double-layer composite steel sheet pile groups and double-layer U-shaped steel sheet pile groups are connected by a long screw passing through the bolt holes on the second square steel pipe and the second connecting plate and locked by a nut. The two double-layer U-shaped steel sheet pile groups are connected by a short screw passing through the bolt holes on the first square steel pipe and locked by a nut.

[0012] The beneficial effects of the present invention are as follows: the enclosure structure of the present invention is connected to each other through the inner bending lock buckle and the outer bending lock buckle, so that the seal between the steel sheet pile groups is tighter, and the steel sheet pile groups are fastened together by the long screw and the short screw, so that the connection between the steel plates is more stable and stronger, and the enclosed structure formed after the steel sheet pile groups are connected is filled with absorbent sponge or sand to ensure a waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure of the enclosure structure on one side of the utility model;

[0015] Figure 3 This is a schematic structural diagram of a double-layer curved steel sheet pile group of the present invention;

[0016] Figure 4 This is a schematic structural diagram of a double-layer composite steel sheet pile group of the present utility model;

[0017] Figure 5 This is a schematic structural diagram of a double-layer U-shaped steel sheet pile group of the present invention;

[0018] In the figure: 1 - enclosure structure; 11 - double-layer curved steel sheet pile group; 111 - double-layer curved steel plate; 112 - first connecting plate; 113 - inner-bend lock; 12 - double-layer composite steel sheet pile group; 121 - U-shaped steel plate; 122 - straight steel plate; 123 - second square steel pipe; 124 - fourth connecting plate; 13 - double-layer U-shaped steel sheet pile group; 131 - double-layer U-shaped steel plate; 132 - second connecting plate; 133 - outer-bend lock; 134 - third connecting plate; 135 - first square steel pipe; 136 - bolt hole; 137 - operation port; 14 - long screw; 15 - short screw; 2 - perimeter purlin; 3 - support beam; 4 - reinforcement brace;

[0019] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] A double-layer steel sheet pile cofferdam structure for a river channel includes a closed-loop enclosure structure 1. A purlin 2 is arranged along the circumference of the inner side of the enclosure structure 1. A reinforcing brace 4 is provided at each corner inside the purlin 2. A support beam 3 is fixedly connected between the two opposite side surfaces inside the purlin 2. The enclosure structure 1 is connected by a plurality of double-layer curved steel sheet pile groups 11, a plurality of double-layer U-shaped steel sheet pile groups 13 and a plurality of double-layer composite steel sheet pile groups 12.

[0022] The double-layer curved steel sheet pile group 11 includes double-layer curved steel plates 111 and first connecting plates 112 connecting the double-layer curved steel plates 111. Both sides of the double-layer curved steel plates 111 are integrally connected with inwardly curved lock buckles 113.

[0023] The double-layer U-shaped steel sheet pile group 13 includes a double-layer U-shaped steel plate 131 and a second connecting plate 132 connecting the double-layer U-shaped steel plate 131. The two side edges of the double-layer U-shaped steel plate 131 are integrally connected with an outward-bent lock buckle 133, and the bottom of the groove of the upper U-shaped steel plate is connected to the first square steel pipe 135 through the third connecting plate 134.

[0024] A plurality of bolt holes 136 are formed on a side of the first square steel tube 135 away from the third connecting plate 134 and the second connecting plate 132 . An operation port 137 is formed on one side of the bolt holes 136 for easy operation.

[0025] The double-layer composite steel sheet pile group 12 includes a U-shaped steel plate 121 and a straight steel plate 122. The two side edges of the U-shaped steel plate 121 are integrally connected with outward-bending lock buckles 133, and the two side edges of the straight steel plate 122 are integrally connected with inward-bending lock buckles 113. A second square steel pipe 123 is connected to the middle of one side of the straight steel plate 122 facing the U-shaped steel plate 121, and the bottom of the groove of the U-shaped steel plate 121 is connected to the second square steel pipe 123 through a fourth connecting plate 124.

[0026] A plurality of circular bolt holes 136 are provided on two parallel side surfaces of the second square steel tube 123 and the fourth connecting plate 124 , and an operation port 137 for easy operation is provided on one side of the circular bolt holes 136 .

[0027] The double-layer curved steel sheet pile group 11 and the double-layer composite steel sheet pile group 12, the double-layer composite steel sheet pile group 12 facing each other, the double-layer composite steel sheet pile group 12 and the double-layer U-shaped steel sheet pile group 13, the double-layer U-shaped steel sheet pile group 13 and the double-layer composite steel sheet pile group 12 of the enclosure structure 1 are detachably connected by the inner bending lock buckle 113 and the outer bending lock buckle 133 respectively. The adjacent double-layer composite steel sheet pile groups 12 are connected by the inner bending lock buckle 113 and the outer bending lock buckle 133 respectively. The long screw 14 passes through the bolt holes 136 on the second square steel pipe 123 and is locked with a nut. The long screw 14 passes through the bolt holes 136 on the second square steel pipe 123 and the second connecting plate 132 between the adjacent double-layer composite steel sheet pile groups 12 and the double-layer U-shaped steel sheet pile groups 13 and is locked with a nut. The short screw 15 passes through the bolt holes 136 on the first square steel pipe 135 between the two double-layer U-shaped steel sheet pile groups 13 and is locked with a nut.

[0028] During connection, the corner of the enclosure structure 1 is connected by plugging the outer bend lock 133 of the double-layer composite steel sheet pile group 12 with the inner bend lock 113 of the double-layer curved steel sheet pile group 11, and then the reverse double-layer composite steel sheet pile group 12, the forward U-shaped steel sheet pile group 13 and the reverse U-shaped steel sheet pile group 13 are plugged in to both sides in turn, and then the forward double-layer composite steel sheet pile group 12, the reverse double-layer composite steel sheet pile group 12, the forward U-shaped steel sheet pile group 13 are repeatedly plugged in. The pile group 13 and the reverse U-shaped steel sheet pile group 13 are connected to each other through the double-layer composite steel sheet pile 12 and the double-layer curved steel sheet pile group 11 at a corner, and finally a closed enclosure is formed. After the enclosure structure 1 is plugged in, a purlin 2 is arranged along the circumference on the inner side of the enclosure structure 1, and a reinforcing brace 4 is arranged at each corner on the inner side of the purlin 2. A support beam 3 is fixedly connected between the two opposite side surfaces on the inner side of the purlin 2 to reinforce the enclosure structure 1.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A double-layer steel sheet pile cofferdam structure for a river channel, characterized in that: The invention comprises a closed-loop enclosure structure (1), wherein a purlin (2) is arranged along the circumference of the inner side of the enclosure structure (1), a reinforcing brace (4) is arranged at each corner of the inner side of the purlin (2), and a supporting beam (3) is fixedly connected between two opposite side surfaces of the inner side of the purlin (2). The enclosure structure (1) is formed by connecting a plurality of double-layer curved steel sheet pile groups (11), a plurality of double-layer U-shaped steel sheet pile groups (13) and a plurality of double-layer composite steel sheet pile groups (12).

2. A double-layer steel sheet pile cofferdam structure for a river channel according to claim 1, characterized in that: The double-layer curved steel sheet pile group (11) comprises a double-layer curved steel plate (111) and a first connecting plate (112) connecting the double-layer curved steel plate (111), and the two sides of the double-layer curved steel plate (111) are integrally connected with an inwardly curved lock buckle (113).

3. The double-layer steel sheet pile cofferdam structure for a river channel according to claim 2, characterized in that: The double-layer U-shaped steel sheet pile group (13) includes a double-layer U-shaped steel plate (131) and a second connecting plate (132) connecting the double-layer U-shaped steel plate (131). The two side edges of the double-layer U-shaped steel plate (131) are integrally connected with an outward-bent lock buckle (133), and the bottom of the groove of the upper U-shaped steel plate is connected to the first square steel pipe (135) through the third connecting plate (134).

4. The double-layer steel sheet pile cofferdam structure for a river channel according to claim 3, characterized in that: A plurality of bolt holes (136) are provided on a side of the first square steel tube (135) away from the third connecting plate (134) and the second connecting plate (132), and an operation port (137) is provided on one side of the bolt holes (136) for easy operation.

5. The double-layer steel sheet pile cofferdam structure for a river channel according to claim 4, characterized in that: The double-layer composite steel sheet pile group (12) includes a U-shaped steel plate (121) and a straight steel plate (122), the two sides of the U-shaped steel plate (121) are integrally connected with outward-bending lock buckles (133), the two sides of the straight steel plate (122) are integrally connected with inward-bending lock buckles (113), a second square steel pipe (123) is connected in the middle of one side of the straight steel plate (122) facing the U-shaped steel plate (121), and the bottom of the groove of the U-shaped steel plate (121) is connected to the second square steel pipe (123) through a fourth connecting plate (124).

6. The double-layer steel sheet pile cofferdam structure for a river channel according to claim 5, characterized in that: A plurality of bolt holes (136) are provided on two side surfaces of the second square steel tube (123) and the fourth connecting plate (124) that are parallel to each other, and an operation port (137) for easy operation is provided on one side of the bolt hole (136).

7. The double-layer steel sheet pile cofferdam structure for a river channel according to claim 6, characterized in that: The double-layer curved steel sheet pile group (11) and the double-layer composite steel sheet pile group (12), the double-layer composite steel sheet pile group (12) facing each other, the double-layer composite steel sheet pile group (12) and the double-layer U-shaped steel sheet pile group (13), the double-layer U-shaped steel sheet pile group (13) facing each other, and the double-layer U-shaped steel sheet pile group (13) and the double-layer composite steel sheet pile group (12) of the enclosure structure (1) are detachably connected by means of an inner bending lock buckle (113) and an outer bending lock buckle (133), and adjacent double-layer composite steel sheet pile groups (12) are connected by means of a detachable plug-in connection. The overlong screw rod (14) passes through the bolt circular hole (136) on the second square steel pipe (123) and is locked by a nut. The adjacent double-layer composite steel sheet pile group (12) and double-layer U-shaped steel sheet pile group (13) are connected by the long screw rod (14) passing through the bolt circular hole (136) on the second square steel pipe (123) and the second connecting plate (132) and are locked by a nut. The two double-layer U-shaped steel sheet pile groups (13) are connected by the short screw rod (15) passing through the bolt circular hole (136) on the first square steel pipe (135) and are locked by a nut.

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