Combined pile membrane cofferdam

Abstract

The utility model provides a combined pile membrane cofferdam. The cofferdam is formed by splicing a plurality of sections of basic units. Each basic unit comprises a stand column (1) and a cuboid plate-shaped template (2); the upright post (1) is I-shaped steel or C-shaped steel; the two sides of the template (2) are embedded into the grooves of the two stand columns (1); when the two basic units are spliced, the middle stand column (1) is shared by the two basic units, and the shared stand column (1) is I-shaped steel. The cofferdam has the advantages that the cofferdam is suitable for construction with large water flow and water depth (0.5-2 m), the cofferdam is convenient and fast to assemble, easy to operate, simple in product structure, reusable, simple to use and high in working efficiency, and the engineering construction safety is effectively guaranteed.

Description

Technical Field

[0001] This application belongs to the field of cofferdam construction, specifically relating to a composite pile-membrane cofferdam. Background Technology

[0002] Currently, cofferdam construction in rivers and ponds mainly employs various methods such as earth-rock cofferdams, grass-soil cofferdams, bagged soil cofferdams, single-row pile-formed cofferdams, and concrete cofferdams. Earth-rock cofferdams, grass-soil cofferdams, and bagged soil cofferdams are prone to seepage in conditions with large water volumes and sandy soil. Single-row pile-formed cofferdams are susceptible to damage due to limitations in water depth and volume. Concrete cofferdams are expensive and uneconomical.

[0003] Therefore, during the construction of cofferdams, there is an urgent need for a cofferdam that is simple in structure, highly safe, easy to assemble, easy to operate, and reusable. Utility Model Content

[0004] The purpose of this application is to overcome the shortcomings of existing cofferdams, such as easy seepage, easy damage to supports, and high cost.

[0005] To achieve the above objectives, this application proposes a composite pile-membrane cofferdam, which is composed of multiple basic units spliced ​​together;

[0006] The basic unit includes a column and a rectangular plate-shaped template;

[0007] The columns are I-beams or C-shaped steel;

[0008] The template is embedded in the grooves of two columns on both sides;

[0009] When two basic units are spliced ​​together, the middle column is shared by both basic units, and the shared column is an I-beam.

[0010] As an improvement to the aforementioned cofferdam, the cofferdam also includes a waterproof tarpaulin covering the inner side of the cofferdam;

[0011] One end of the waterproof cloth covers the top of the cofferdam, the middle part is tightly attached to the template, and the other end is laid on the bottom of the water.

[0012] The waterproof fabric at the bottom is secured with pressure bags.

[0013] As an improvement to the aforementioned cofferdam, the waterproof fabric is made of composite geomembrane, high-strength biaxial polyester filament PVC-coated geomembrane, double-layer striped fabric, or PVC.

[0014] As an improvement to the aforementioned cofferdam, the pressure bag is a sandbag or a bag filled with pebbles.

[0015] As an improvement to the aforementioned cofferdam, the waterproof fabric comprises multiple waterproof fabric blocks that overlap sequentially; at the overlap between two adjacent waterproof fabric blocks, the waterproof fabric block in the upstream direction is on top.

[0016] As an improvement to the aforementioned cofferdam, the overlap length of the two waterproof fabric blocks is greater than 6m.

[0017] As an improvement to the aforementioned cofferdam, the cofferdam also includes inclined support rods located on the outside of the cofferdam;

[0018] One end of the inclined support rod is fixed to the middle of the column, and the other end is inserted into the soil.

[0019] As an improvement to the aforementioned cofferdam, the inclined support rod is an I-beam or a channel steel.

[0020] As an improvement to the aforementioned cofferdam, the tops of the columns and formwork are 0.5-1.0m above the normal water level.

[0021] As an improvement to the aforementioned cofferdam, the template is made of 6015 steel.

[0022] Compared with existing technologies, the advantages of this application are:

[0023] Suitable for cofferdam construction in areas with large water flow and water depth (0.5-2m), it is easy to assemble and operate. Its product structure is simple and reusable, and it is easy to use, highly efficient, and effectively ensures the safety of engineering construction. Attached Figure Description

[0024] Figure 1 The image shown is a front view of a section of a combined membrane cofferdam;

[0025] Figure 2 The image shown is a top view of a section of a combined membrane cofferdam;

[0026] Figure 3 The image shown is a front view of a basic unit of a combined membrane cofferdam.

[0027] Figure 4 The image shown is a top view of a basic unit of a combined membrane cofferdam.

[0028] Figure 5 The diagram shown is a longitudinal section of a combined membrane cofferdam.

[0029] Attached image labels:

[0030] 1. Columns 2. Formwork

[0031] 3. Waterproof cloth 4. Pressure bag

[0032] 5. Diagonal support rod Detailed Implementation

[0033] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0034] This application provides a combined pile-membrane cofferdam, which is structurally safe and efficient, and is suitable for cofferdam construction in water flow and water depth range (0.5-2m). Its product has a simple structure, high installation efficiency, and is reusable, effectively ensuring the safety of engineering construction.

[0035] like Figure 1 , Figure 2 As shown, the composite pile-membrane cofferdam provided in this application is composed of multiple basic units spliced ​​together. Depending on construction needs, these basic units can be spliced ​​together to form a composite pile-membrane cofferdam of any length.

[0036] like Figure 3 , Figure 4 As shown, a basic unit includes two columns 1 and one template 2. The columns 1 located at the edge of the composite membrane cofferdam are I-beams or C-shaped steel, while those located in the middle of the composite membrane cofferdam are I-beams. The template 2 is a rectangular plate, with both sides embedded in the grooves of the I-beams or C-shaped steel of the columns 1, and is made of 6015 steel. When two basic units are spliced, the middle column 1 is shared by both basic units, and one end of each template 2 is embedded in one of the two grooves on either side of the I-beam of the column 1.

[0037] like Figure 5 As shown, during construction, multiple columns 1 are inserted into the soil (using mechanical equipment to vibrate and drive them into the river / lake bottom), with the height of column 1 above the ground the same as the height of formwork 2. The height of formwork 2 is determined according to the water depth and must be a certain distance above the water level. The distance between columns 1 is slightly less than the width of formwork 2, allowing formwork 2 to be inserted into the grooves of two columns 1. A crane can directly lift formwork 2 between two columns 1, and multiple basic units are combined to form a composite pile-membrane cofferdam. Then, a waterproof tarpaulin 3 is used to cover the inside of the cofferdam (the side with water). One end of the waterproof tarpaulin 3 covers the top of the cofferdam, the middle is pressed tightly against formwork 2, and the other end is laid on the bottom of the water, secured with weight bags 4. When laying the waterproof tarpaulin 3, it is laid from downstream to upstream, with the two waterproof tarpaulins 3 overlapping with the water flow, and the overlap length is not less than 6m. The waterproof tarpaulin 3 can be made of composite geomembrane, double-layer tarpaulin, or PVC, etc. The weight bags 4 can be sandbags or bags filled with pebbles, etc.

[0038] If the water depth is too great (e.g., exceeding 1m), diagonal support rods 5 can be installed on the outer side of the cofferdam on column 1 to increase its stability. One end of the diagonal support rod 5 is fixed to the middle of column 1, and the other end is inserted into the soil. The diagonal support rod 5 can be made of steel pipe, I-beam, or C-shaped steel to ensure that the column does not bend.

[0039] The construction of the cofferdam is explained based on a water depth of 1.5m:

[0040] I-beams or channel steel are used as columns 1, each 4m long, driven 2m into the riverbed and 2m above the riverbed, with a spacing of 1500mm between columns 1; the diagonal support rods 5 are also made of I-beams or channel steel and are securely fixed to columns 1.

[0041] Composite geomembrane (300g / m²) is used 2 +0.6mm +300g / m 2 A high-strength biaxial polyester filament PVC-coated geomembrane (or double-layer striped tarpaulin, PVC, etc.) is used as the waterproofing fabric 3, with a vertical height of 2.5m and a horizontal length of 5.0m. The waterproofing fabric 3 is laid from downstream to upstream, overlapping with the water flow, with an overlap length of not less than 6m. The waterproofing fabric 3 on the riverbed is secured with bagged pebbles 4, and they are neatly stacked during construction.

[0042] Depending on the normal water level, the top of column 1 is 0.5-1.0m above the normal water level; the length and dimensions of column 1 and diagonal support rod 5 increase accordingly with the increase of water level.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A composite pile-membrane cofferdam, characterized in that, The cofferdam is composed of multiple basic unit segments spliced ​​together. The basic unit includes a column (1) and a rectangular plate-shaped template (2); The column (1) is an I-beam or a C-beam; The template (2) is embedded in the grooves of two columns (1) on both sides; When two basic units are spliced ​​together, the middle column (1) is shared by both basic units, and the shared column (1) is an I-beam.

2. The combined pile-membrane cofferdam according to claim 1, characterized in that, The cofferdam also includes a waterproof tarpaulin (3) covering the inside of the cofferdam; One end of the waterproof cloth (3) covers the top of the cofferdam, the middle part is close to the template (2), and the other end is laid on the bottom of the water; The waterproof fabric (3) at the bottom is pressed tightly with a pressure bag (4).

3. The combined pile-membrane cofferdam according to claim 2, characterized in that, The waterproof fabric (3) is made of composite geomembrane, high-strength biaxial polyester filament PVC coated geomembrane, double-layer striped fabric or PVC.

4. The combined pile-membrane cofferdam according to claim 2, characterized in that, The pressure bag (4) is a sandbag or a bag containing pebbles.

5. The combined pile-membrane cofferdam according to claim 2, characterized in that, The waterproof fabric (3) includes multiple waterproof fabric pieces that overlap in sequence; at the overlap between two adjacent waterproof fabric pieces, the waterproof fabric piece in the upstream direction is on top.

6. The combined pile-membrane cofferdam according to claim 5, characterized in that, The overlap length of the two waterproof fabric pieces is greater than 6m.

7. The combined pile-membrane cofferdam according to any one of claims 1-6, characterized in that, The cofferdam also includes an inclined support rod (5) located on the outside of the cofferdam; One end of the inclined support rod (5) is fixed to the middle of the column (1), and the other end is inserted into the soil.

8. The combined pile-membrane cofferdam according to claim 7, characterized in that, The inclined support rod (5) is an I-beam or a channel steel.

9. The combined pile-membrane cofferdam according to claim 1, characterized in that, The tops of the columns (1) and the templates (2) are 0.5-1.0m above the normal water level.

10. The combined pile-membrane cofferdam according to claim 1, characterized in that, The template (2) is made of 6015 steel.

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