A floating cofferdam suitable for use on a silt bed and a method of installing the same

Abstract

This invention discloses a floating cofferdam suitable for silty seabeds and its installation method, comprising a float, a geotextile cofferdam body, a filling pipe, and anchoring components. The float is installed at the top of the inner side of the geotextile cofferdam body. The filling pipe penetrates both inside and outside the top of the geotextile cofferdam body to fill it with slurry. One end of the anchoring component is connected to the seabed bottom, and the other end is connected to the geotextile cofferdam body near the top. The floating cofferdam of this invention has a relatively simple overall structure, is easy to install, and is suitable for silty seabeds.

Description

Technical Field

[0001] This invention relates to the field of cofferdam technology, specifically to a floating cofferdam suitable for silty bottoms and its installation method. Background Technology

[0002] During the planting of coastal mangroves, land reclamation is necessary to accommodate mangrove growth and achieve a suitable planting elevation. Silt and sand provide essential nutrients for mangrove growth. During construction, cofferdams need to be built in the reclaimed area, and dredgers are used to transport silt into the cofferdams. Existing cofferdams are mostly constructed by stacking geotextile bags filled with sand, resulting in high overall costs. Furthermore, due to uneven settlement, some sections of the cofferdams have insufficient top elevation, leading to a loss of their function. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a floating cofferdam suitable for silty beds. Its overall structure is relatively simple, easy to install, and suitable for silty beds.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] A floating cofferdam suitable for silty seabed includes a float, a geotextile cofferdam body, a filling pipe, and an anchor. The float is installed at the top of the inner side of the geotextile cofferdam body. The filling pipe penetrates the top of the geotextile cofferdam body to fill the interior of the geotextile cofferdam body with mud. One end of the anchor is connected to the bottom of the seabed, and the other end is connected to the geotextile cofferdam body near the top.

[0006] Furthermore, the geotextile dam body is made of geotextile with a certain woven porosity, so that the geotextile dam body is permeable to water but not to mud and sand particles.

[0007] Furthermore, the geotextile weir body is filled with mud to form an elliptical cylindrical structure.

[0008] Furthermore, the float is composed of several PVC pipes stacked in an inverted triangle, with both ends of each PVC pipe sealed, and the mud filling pipe is fixedly connected to the float.

[0009] Furthermore, the float is composed of three PVC pipes stacked in an inverted triangle, with adjacent PVC pipes fixedly connected together, and a mud filling pipe fixedly connected to each end of the float.

[0010] Furthermore, the anchoring components include at least four anchor chains and four anchor bolts. The four anchor chains are respectively connected to the left and right sides of the front and rear ends of the geotextile weir and are anchored to the seabed bottom surface by the corresponding anchor bolts.

[0011] Based on the same inventive concept, the present invention also provides an installation method for the above-mentioned floating cofferdam, comprising the following steps: S1, excavating a mud trench at the designated cofferdam installation location on the seabed bottom, and towing the floating cofferdam to the mud trench at high tide; S2, anchoring the geotextile cofferdam body on both sides using anchoring components; S3, connecting the external mud slurry pipeline to the mud filling pipe exposed at the top of the geotextile cofferdam body, filling the geotextile cofferdam body with mud slurry to form the cofferdam body, and sealing each mud filling pipe after the mud filling is completed; S4, partially embedding the bottom of the formed geotextile cofferdam body into the mud trench on the seabed bottom, backfilling the mud trench on the seabed bottom with mud and sand, thereby forming a closed bottom of the cofferdam; S5, after the cofferdam is installed, transporting mud to the area inside the cofferdam through the external mud slurry pipeline for land reclamation.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] The floating cofferdam and its installation method for silty seabeds described in this invention can fill the geotextile cofferdam body with mud through a mud filling pipe to form the main structure of the cofferdam. At the same time, floats are set in the geotextile cofferdam body to make the cofferdam a floating structure. It is particularly suitable for silty seabeds. Furthermore, the floating cofferdam is positioned on the seabed by anchoring components. Compared with the currently commonly used geotextile bag stacked solid cofferdams, this floating cofferdam is easy to install, has a simple structure, can adapt to water level changes caused by tides, can realize the cofferdam function at different water levels, and can also quickly raise existing low cofferdams. Attached Figure Description

[0014] Figure 1 This is a structural side view of the floating cofferdam according to an embodiment of the present invention.

[0015] Figure 2 This is a top view of the floating cofferdam according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the assembly structure of the floating body and the geotextile weir body according to an embodiment of the present invention.

[0017] Figure 4 This is a three-dimensional structural diagram of the float according to an embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the installation of a floating cofferdam according to an embodiment of the present invention.

[0019] Figure 6 This is another installation schematic diagram of the floating cofferdam according to an embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the overlapping connection of multiple floating cofferdams according to an embodiment of the present invention.

[0021] Figure 8This is a schematic diagram of the staggered connection of multiple floating cofferdams according to an embodiment of the present invention.

[0022] Label Explanation:

[0023] 1. Floating body, 2. Geotextile weir body, 3. Mud filling pipe, 4. Anchoring component, 11. PVC pipe, 41. Anchor chain, 42. Anchor nail. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 6 An embodiment of the present invention provides a floating cofferdam suitable for silty bottoms, comprising a float 1, a geotextile cofferdam body 2, a mud filling pipe 3, and an anchoring member 4. The float 1 is installed at the top of the inner side of the geotextile cofferdam body 2. The mud filling pipe 3 penetrates the top of the geotextile cofferdam body 2 both inside and out to fill the interior of the geotextile cofferdam body 2 with mud. One end of the anchoring member 4 is connected to the bottom of the seabed, and the other end is connected to a position near the top of the geotextile cofferdam body 2. It is understood that in this embodiment, mud can be filled into the geotextile weir body 2 through the mud filling pipe 3 to form the main structure of the cofferdam. At the same time, a float 1 is set in the geotextile weir body 2 to make the cofferdam a floating structure, which is particularly suitable for silty seabeds. Furthermore, the floating cofferdam is positioned on the seabed by anchoring components. Compared with the currently commonly used geotextile bag stacked solid cofferdams, this floating cofferdam is easy to install, has a simple structure, can adapt to water level changes caused by tides, can realize the cofferdam function at different water levels, and can also quickly raise existing low cofferdams.

[0027] Please refer to the appendix. Figure 3 In one preferred embodiment, the geotextile weir 2 is made of geotextile with a certain weave pore size, so that the geotextile weir 2 is permeable to water but not to mud and sand particles.

[0028] Please refer to the appendix. Figure 1 Appendix Figure 3 In one preferred embodiment, the geotextile weir 2 is filled with mud to form an elliptical cylindrical structure. Preferably, the geotextile weir 2 is configured to be larger at the top and smaller at the bottom.

[0029] Please refer to the appendix. Figure 4 Appendix Figure 5 In one preferred embodiment, the float 1 is composed of several PVC pipes 11 stacked in an inverted triangle arrangement, with both ends of each PVC pipe 11 closed, and a mud-filling pipe 3 fixedly connected to the float 1. In another preferred embodiment, preferably, the float 1 is composed of three PVC pipes 11 stacked in an inverted triangle arrangement, with adjacent PVC pipes 11 fixedly connected together, and a mud-filling pipe 3 fixedly connected to each end of the float 1. However, those skilled in the art should understand that in other embodiments, the float 1 can also be composed of other numbers of PVC pipes 11, and can form other stacking arrangements, and is not limited to the specific implementation disclosed in this embodiment. Furthermore, the float 1 can also be composed of other types of floating structures such as buoys, and is not limited to the specific implementation disclosed in this embodiment.

[0030] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the anchoring element 4 includes at least four anchor chains 41 and four anchor bolts 42. The four anchor chains 41 are respectively connected to the left and right sides of the front and rear ends of the geotextile weir 2, and are anchored to the seabed by the corresponding anchor bolts 42. However, those skilled in the art should understand that in other embodiments, the anchoring element 4 can also be other anchoring structures, and is not limited to the specific implementation disclosed in this embodiment. In addition, the anchoring element 4 can also be composed of other numbers of anchor chains 41 and anchor bolts 42, as long as it can stably anchor the floating cofferdam.

[0031] Please refer to the appendix. Figure 5 To be continued Figure 8 An embodiment of the present invention also provides an installation method for the above-mentioned floating cofferdam, comprising the following steps: S1, excavating a mud trench at a designated cofferdam installation location on the seabed bottom, and towing the floating cofferdam to the mud trench at high tide; S2, anchoring the geotextile cofferdam body 2 on both sides using anchoring components 4; S3, connecting the external mud slurry pipeline to the mud filling pipe 3 exposed at the top of the geotextile cofferdam body 2, filling the geotextile cofferdam body 2 with mud slurry to form the cofferdam body, and sealing each mud filling pipe 3 after the mud filling is completed; S4, partially embedding the bottom of the formed geotextile cofferdam body 2 into the mud trench on the seabed bottom, backfilling the mud trench on the seabed bottom with mud and sand, thereby forming a closed bottom of the cofferdam; S5, after the cofferdam is installed, transporting mud to the area inside the cofferdam through the external mud slurry pipeline for land reclamation.

[0032] Please refer to the appendix. Figure 7 Appendix Figure 8 For smaller reclamation areas, floating cofferdams can be fabricated, transported, and installed as a whole; for larger reclamation areas, floating cofferdams can be fabricated, transported, and installed in sections. During section installation, the mud-filling pipes 3 at the ends of adjacent sections of the floating cofferdam can be connected by a connecting structure to achieve overlap (as shown in the attached diagram). Figure 7(as shown) or misaligned connection (as attached) Figure 8 (As shown).

[0033] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

Claims

1. A floating cofferdam suitable for silty bedbeds, characterized in that: It includes a float (1), a geotextile weir (2), a mud filling pipe (3), and an anchor (4). The float (1) is installed at the top of the inner side of the geotextile weir (2). The mud filling pipe (3) penetrates the top of the geotextile weir (2) inside and out to fill the interior of the geotextile weir (2) with mud. One end of the anchor (4) is connected to the bottom of the seabed, and the other end is connected to the geotextile weir (2) near the top.

2. The floating cofferdam suitable for silty bed as described in claim 1, characterized in that: The geotextile dam body (2) is made of geotextile with a certain weave pore size so that the geotextile dam body (2) is permeable to water but not to mud and sand particles.

3. The floating cofferdam suitable for silty bed as described in claim 2, characterized in that: The geotextile weir (2) is filled with mud to form an elliptical cylindrical structure.

4. The floating cofferdam suitable for silty bed as described in claim 1, characterized in that: The float (1) is composed of several PVC pipes (11) stacked in an inverted triangle, and both ends of each PVC pipe (11) are closed. The mud filling pipe (3) is fixedly connected to the float (1).

5. The floating cofferdam suitable for silty bed as described in claim 4, characterized in that: The float (1) is composed of three PVC pipes (11) stacked in an inverted triangle, with adjacent PVC pipes (11) fixedly connected together, and a mud filling pipe (3) fixedly connected to each end of the float (1).

6. The floating cofferdam suitable for silty bed as described in any one of claims 1 to 5, characterized in that: The anchoring component (4) includes at least four anchor chains (41) and four anchor pins (42). The four anchor chains (41) are respectively connected to the left and right sides of the front and rear ends of the geotextile weir (2) and are anchored to the seabed bottom through the corresponding anchor pins (42).

7. A method for installing a floating cofferdam suitable for a silty bed as described in claim 6, characterized in that: Includes the following steps: S1. Excavate a mud trench at the designated cofferdam installation location on the seabed bottom and tow the floating cofferdam to the mud trench at high tide. S2, anchor the geotextile weir (2) on both sides using anchoring element (4); S3, connect the external mud pipe to the mud filling pipe (3) exposed at the top of the geotextile dam body (2), fill the geotextile dam body (2) with mud to form the dam body, and seal each mud filling pipe (3) after the mud filling is completed. S4, the bottom of the formed geotextile dam body (2) is partially embedded in the mud trough on the bottom of the seabed, and mud and sand are backfilled into the mud trough on the bottom of the seabed to form a closed bottom of the dam. S5. After the cofferdam is installed, mud is pumped into the area inside the cofferdam through external mud pipelines for land reclamation.

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