Steel-soil composite cofferdam structure

Abstract

The utility model relates to a steel-soil composite cofferdam structure which comprises a steel-soil composite cofferdam blocked on one side of an overflowing channel, the steel-soil composite cofferdam comprises a weir wall with two sides inserted into the ground, the weir wall is formed by splicing Larsen steel sheet piles, and steel pipe piles inserted into the ground are arranged on the outward sides of the weir walls on the two sides at intervals. A cross beam is connected between the upper ends of the corresponding steel pipe piles on the left and right positions on the two sides, and the space between the weir walls on the two sides is filled with a soil-rock mixture located above the land. According to the steel-soil composite cofferdam structure, the strength of a steel structure and the stability of the soil-rock mixture are combined, so that the steel-soil composite cofferdam structure has excellent stability, and the narrowing influence on a riverbed can be reduced; the steel-soil composite cofferdam structure is compact in structure and reusable in material, so that the investment cost is relatively low, the steel-soil composite cofferdam structure shows remarkable advantages in a narrow river channel and a high-flow-velocity environment, and a more efficient, economical and reliable solution is provided for engineering implementation.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a steel-soil composite cofferdam structure. Background Art

[0002] In actual engineering environments with narrow river channels and fast-flowing currents, the application of traditional cofferdam structures faces many challenges.

[0003] If earth-rock cofferdams are used, they will often occupy too much space in the river channel due to their large size, which will seriously affect the natural channel of water flow and reduce the flow capacity of the river channel. What is more serious is that under the scouring of high-speed water flow, the structural safety of earth-rock cofferdams is easily threatened, and their stability and durability are greatly reduced.

[0004] Although the concrete cofferdam has a strong structure, it needs to set up an outer earth and stone cofferdam as a water retaining structure before construction, which not only increases the difficulty and complexity of construction, but also significantly increases the cost of the project. At the same time, in the narrow river environment, this construction method often lacks sufficient construction conditions, which limits the application of concrete cofferdams.

[0005] As for the use of steel sheet pile cofferdam alone, although it has a certain degree of flexibility, its stability is difficult to meet the requirements of complex river environment. Especially in the case of turbulent water flow and deep water, the fixation and support of steel sheet pile cofferdam becomes a major problem, making it difficult to ensure the safety and stability of the project. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a steel-soil composite cofferdam structure with high strength, good stability, compact structure and narrow width.

[0007] The utility model is implemented by the following scheme: a steel-soil composite cofferdam structure, including a steel-soil composite cofferdam blocking one side of a flow passage, the steel-soil composite cofferdam including weir walls on both sides inserted into the ground, the weir walls are spliced ​​by Larsen steel sheet piles, steel pipe piles inserted into the ground are arranged at intervals on the outward side of the weir walls on both sides, crossbeams are connected between the upper ends of the steel pipe piles at the left and right positions on both sides, and soil-rock mixture located above the ground is filled between the weir walls on both sides.

[0008] Furthermore, a slope surface is provided on the side of the flow passage opposite to the steel-soil composite cofferdam, and a bagged soil protective layer with a thickness of 30 cm is paved on the slope surface and the bottom surface of the flow passage.

[0009] Furthermore, the depth of the flow channel is 3.9-4.3 m, the slope of the slope of the flow channel is 1:1.5, and the height of the steel-soil composite cofferdam above the bottom of the flow channel is 4.9-5.3 m.

[0010] Furthermore, the width between the weir walls on both sides of the steel-soil composite cofferdam is 5m, the spacing between two adjacent steel pipe piles on the same side is 2m, the diameter of the steel pipe pile is 40cm, and C20 concrete is poured into the steel pipe pile.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the steel-soil composite cofferdam structure of the utility model combines the strength of the steel structure and the stability of the soil-rock mixture, and has both excellent stability and can reduce the narrowing effect on the riverbed; due to its compact structure and reusable materials, the investment cost is relatively low. In narrow river channels and high flow rate environments, this steel-soil composite cofferdam structure shows significant advantages, providing a more efficient, economical and reliable solution for engineering implementation.

[0012] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of an embodiment of the utility model;

[0014] Explanation of numbers in the figure: 1-flow channel, 2-steel-soil composite cofferdam, 3-dam wall, 4-steel pipe piles, 5-crossbeam, 6-soil-rock mixture, 7-bag soil protective layer. DETAILED DESCRIPTION

[0015] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0017] like Figure 1As shown, a steel-soil composite cofferdam structure includes a steel-soil composite cofferdam 2 blocking one side of a flow channel 1. Water flows along the flow channel 1 due to the enclosure of the steel-soil composite cofferdam. The steel-soil composite cofferdam includes weir walls 3 inserted into the ground on both sides. The weir walls 3 are spliced ​​by Larsen steel sheet piles. Steel pipe piles 4 inserted into the ground are arranged at intervals on the outward side of the weir walls on both sides. A crossbeam 5 is connected between the upper ends of the steel pipe piles corresponding to the left and right positions on both sides. The crossbeam is made of I-beam and is welded to the upper ends of the steel pipe piles. The weir wall and the steel pipe piles are also welded together. The space between the weir walls on both sides is filled with soil-rock mixture 6 located above the ground.

[0018] The steel-soil composite cofferdam structure combines the strength of the steel structure with the stability of the soil-rock mixture. It has excellent stability and can reduce the narrowing effect on the riverbed. At the same time, due to its compact structure and reusable materials, the investment cost is relatively low. In narrow river channels and high flow environments, this steel-soil composite cofferdam structure shows significant advantages and provides a more efficient, economical and reliable solution for engineering implementation.

[0019] In this embodiment, a slope surface is provided on the side of the flow passage opposite to the steel-soil composite cofferdam, and a bagged soil protective layer 7 with a thickness of 30 cm is paved on the slope surface and the bottom surface of the flow passage.

[0020] In this embodiment, the depth of the flow channel is 3.9-4.3m, the bottom width of the flow channel is 3m, the slope of the slope of the flow channel is 1:1.5, and the height of the steel-soil composite cofferdam above the bottom of the flow channel is 4.9-5.3m.

[0021] In this embodiment, the width between the walls on both sides of the steel-soil composite cofferdam is 5m, the spacing between two adjacent steel pipe piles on the same side is 2m, the diameter of the steel pipe pile is 40cm, and C20 concrete is poured into the steel pipe pile.

[0022] In this embodiment, the length of the Larsen steel sheet pile is 18m, the length of the steel pipe pile is 29-30m, and the diameter is 40cm. The Larsen steel sheet pile is inserted into the gravel layer of the land, and the steel pipe pile is inserted into the loose strongly weathered granodiorite layer of the land.

[0023] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the utility model, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the utility model.

[0024] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0025] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0026] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0027] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A steel-soil composite cofferdam structure, characterized in that: It includes a steel-soil composite cofferdam blocking one side of the flow channel, the steel-soil composite cofferdam includes weir walls on both sides inserted into the ground, the weir walls are spliced ​​by Larsen steel sheet piles, steel pipe piles inserted into the ground are arranged at intervals on the outward side of the weir walls on both sides, crossbeams are connected between the upper ends of the corresponding steel pipe piles at the left and right positions on both sides, and the space between the weir walls on both sides is filled with soil and stone mixture located above the ground.

2. The steel-soil composite cofferdam structure according to claim 1 is characterized in that: The flow passage is provided with a slope surface on the side opposite to the steel-soil composite cofferdam, and the slope surface and the bottom surface of the flow passage are both paved with a bagged soil protective layer with a thickness of 30 cm.

3. The steel-soil composite cofferdam structure according to claim 2 is characterized in that: The depth of the flow channel is 3.9-4.3 m, the slope of the slope of the flow channel is 1:1.5, and the height of the steel-soil composite cofferdam above the bottom of the flow channel is 4.9-5.3 m.

4. The steel-soil composite cofferdam structure according to claim 1 is characterized in that: The width between the weir walls on both sides of the steel-soil composite cofferdam is 5m, the spacing between two adjacent steel pipe piles on the same side is 2m, the diameter of the steel pipe pile is 40cm, and C20 concrete is poured into the steel pipe pile.

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