Tidal influence external steel casing communicating combined drainage single-wall steel hanging box cofferdam and construction method

Abstract

The invention provides a tide-affected single-wall steel hanging box cofferdam with external steel casings and communicated combined drainage and a construction method. The tide-affected single-wall steel hanging box cofferdam mainly comprises a single-wall steel hanging box cofferdam body, pulleys, steel wire ropes, winches, pull rings, steel hanging box reinforcing inclined struts, the steel casings, steel hanging box guiding reinforcing steel plates, guiding pulleys and water collecting steel casings. Aiming at tide influence, external steel casing communicating combined drainage single-wall steel hanging box cofferdam construction is conducted, steel hanging box guiding reinforcing steel plates and steel hanging box reinforcing inclined struts are arranged in a single-wall steel hanging box cofferdam for reinforcing treatment, and guiding positioning installation is conducted on the installation position of the single-wall steel hanging box cofferdam through pulleys, steel wire ropes, winches, pull rings and guiding pulleys. A water collecting steel casing is arranged on the outer side of the single-wall steel hanging box cofferdam to collect and discharge water. The invention belongs to the field of civil engineering, and relates to a construction method for a single-wall steel hanging box cofferdam with external steel casings communicated with combined drainage under the tide influence, which effectively reduces the engineering cost, accelerates the construction speed, and can obtain better technical and economic benefits when being applied to actual engineering.

Description

Technical Field

[0001] The present invention relates to the field of civil engineering, and in particular to a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam and a construction method. Background Art

[0002] Tidal phenomena are widespread in all types of water, and the periodic fluctuations in water levels they cause present significant technical challenges for cofferdam construction. Traditional cofferdam construction methods, when affected by tides, can cause rapid changes in water levels to lead to unstable pressure differentials inside and outside the cofferdam, subjecting the cofferdam structure to significant lateral forces and buoyancy, increasing the risk of cofferdam instability.

[0003] Conventional single-wall steel box cofferdam construction has problems such as poor cofferdam installation positioning accuracy, low cofferdam installation construction efficiency, poor connection between steel casing and bottom concrete, and poor cofferdam drainage effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam and construction method to solve the above technical problems.

[0005] To solve the above technical problems, the present invention provides a construction method for a tidal-affected external steel casing connected to a combined drainage single-wall steel hanging box cofferdam, comprising the following steps: Step 1: Steel casing construction: Carry out steel casing construction and set up water collection steel casing outside the cofferdam position; Step 2: Fabrication and installation of single-wall steel hanging box: Lower the single-wall steel hanging box to the periphery of several steel casings, insert the single-wall steel hanging box into the steel casings, and use steel wire ropes and winches to guide and locate the installation position of the single-wall steel hanging box cofferdam; Step 3: Treatment of the cofferdam drainage system: a steel box reserved water collection ditch and a steel box bottom plate water inlet hole are set on the steel box bottom plate of the single-wall steel box cofferdam. The steel box bottom plate water inlet hole is connected to the inner side of the single-wall steel box cofferdam and the steel box reserved water collection ditch. A drainage pipe is set in the steel box reserved water collection ditch to drain water into the water collection steel casing; Step 4: Steel casing treatment: The steel casing is anchored to the bottom concrete in the single-wall steel hanging box cofferdam through the back pressure bracket and the steel casing anchoring clamp. The single-wall steel hanging box cofferdam is located around the steel casing and a grouting pipe and a leakage repeated grouting pipe are set to perform grouting and plugging treatment; Step 5: Pouring bottom concrete: The concrete pouring hopper support bracket is cross-mounted on the upper part of several steel casings. The concrete pouring hopper support bracket is provided with a hopper guide column, a hopper diagonal brace and a hopper support beam to support the concrete pouring hopper.

[0006] The beneficial effects of the present invention are: (1) Adopting the cofferdam guide pier, steel casing guide pier and winch and pulley combination sinking technology to improve the cofferdam installation positioning accuracy and construction efficiency; (2) Use steel casing anchor clamps, counter-pressure brackets and repeated grouting pipes to strengthen the connection between the steel casing and the bottom concrete to improve the connection strength between the steel casing and the bottom concrete; (3) Use water-collecting steel casing and steel hanging box to reserve water collection ditch to remove water from the cofferdam and improve the drainage effect of the cofferdam; (4) Use a concrete pouring hopper to place the bracket for the bottom concrete pouring construction to improve the efficiency and quality of the bottom concrete pouring construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is the structural diagram of the single-wall steel box cofferdam with external steel casing connected to the combined drainage under the influence of tides; Figure 2 This is the structural diagram of the steel box cofferdam guide installation; Figure 3 It is the structural diagram of steel casing and water collection steel casing; Figure 4 This is a structural diagram of the support for the concrete pouring hopper; Figure 5 It is a cross-sectional view of the support bracket for the concrete pouring hopper.

[0008] Figure: 1. Single-wall steel box cofferdam; 2. Pulley; 3. Steel wire rope; 4. Winch; 5. Pull ring; 6. Steel box reinforcement brace; 7. Steel casing; 8. Steel box guide reinforcement plate; 9. Guide pulley; 10. Steel box side plate; 11. Cofferdam guide pier; 12. Steel casing guide pier; 13. Guide support beam; 14. Guide support brace; 15. Jack; 16. Externally exposed re-grouting pipe; 17. Steel casing anchor clamp; 18. Grouting pipe ; 19. Clamp connecting plate; 20. Clamp fixing bolt; 21. Steel hoisting box bottom plate; 22. Steel hoisting box reserved water collection ditch; 23. Drain pipe; 24. Water collection steel casing; 25. Water inlet hole of steel hoisting box bottom plate; 26. Anchor steel bar; 27. Concrete pouring hopper support bracket; 28. Concrete pouring hopper; 29. Hopper guide column; 30. Hopper diagonal support; 31. Hopper bracket crossbeam; 32. Hopper guide tube; 33. Back pressure bracket; 34. Bottom sealing concrete. DETAILED DESCRIPTION

[0009] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0010] It should be understood by those skilled in the art that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which 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 operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0011] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0012] like Figure 1-Figure 5 The present invention provides a construction method for a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam, comprising the following steps: Step 1, steel casing 7 construction: Carry out steel casing 7 construction, and set up water collection steel casing 24 outside the cofferdam position; Step 2, single-wall steel hanging box production and installation: the produced single-wall steel hanging box is transported to the construction site by transportation equipment, and is lowered to the periphery of several steel casings 7 by using equipment such as a crane or a floating crane, so that it is inserted into the steel casings 7, and the pulley 2, steel wire rope 3, hoist 4, pull ring 5 and guide pulley 9 are used to guide and position the installation position of the single-wall steel hanging box cofferdam 1. The single-wall steel hanging box cofferdam 1 uses the cofferdam guide pier 11 to adjust and position the position of the steel hanging box side plate 10; Among them, one end of the wire rope 3 is connected to the four sides of the single-wall steel hanging box through the pull ring 5, and the other end is connected to the winch 4, and the wire rope 3 is wound around the pulley 2 and the guide pulley 9 in sequence, so that the single-wall steel hanging box is moved and positioned by the wire rope 3 to form a single-wall steel hanging box cofferdam 1; the inner side of the steel hanging box side plate 10 of the single-wall steel hanging box cofferdam 1 has a cofferdam guide pier 11, and the side of the steel casing 7 has a steel casing guide pier 12, and the cofferdam guide pier 11 and the steel casing guide pier 12 have matching guide slopes, so that when the single-wall steel hanging box is hoisted, it can be guided to the lower position through the guide slope.

[0013] Step 3: Treatment of the cofferdam drainage system: A steel box reserved water collection ditch 22 and a steel box bottom plate water inlet hole 25 are set on the steel box bottom plate 21 of the single-wall steel box cofferdam 1. The steel box bottom plate water inlet hole 25 connects the inner side of the single-wall steel box cofferdam 1 with the steel box reserved water collection ditch 22. A drainage pipe 23 is set in the steel box reserved water collection ditch 22 to drain water into the water collection steel casing 24; Step 4, steel casing 7 treatment: The steel casing 7 is anchored to the bottom concrete 34 in the single-wall steel hanging box cofferdam 1 through the back pressure bracket 33 and the steel casing anchoring hoop 17. Hoop connecting plates 19 are provided at both ends of the steel casing anchoring hoop 17. The hoop connecting plates 19 of two adjacent steel casing anchoring hoops 17 are connected by hoop fixing bolts 20, and a plurality of anchor steel bars 26 are arranged at intervals on the outside of the steel casing anchoring hoop 17. The single-wall steel hanging box cofferdam 1 is provided with a grouting pipe 18 and a leakage repeated grouting pipe 16 on the periphery of the steel casing 7 for grouting sealing treatment; Step 5. Pouring of bottom concrete 34: Use a concrete pouring hopper support bracket 27 and a concrete pouring hopper 28 to pour the bottom concrete 34. The concrete pouring hopper support bracket 27 is cross-mounted on the upper part of several steel casings 7. The concrete pouring hopper support bracket 27 is provided with a hopper guide column 29, a hopper diagonal brace 30 and a hopper support crossbeam 31 to support the concrete pouring hopper 28.

[0014] like Figure 1 The structure diagram of a single-wall steel box cofferdam 1 connected to an external steel casing 7 for combined drainage to prevent tidal effects is shown. The structure primarily includes the single-wall steel box cofferdam 1, pulley 2, steel wire rope 3, winch 4, pull ring 5, steel box reinforcement brace 6, steel casing 7, steel box guide reinforcement steel plate 8, guide pulley 9, and water-collecting steel casing 24. To address the tidal effects of the construction of the single-wall steel box cofferdam 1 connected to an external steel casing 7, the single-wall steel box cofferdam 1 is reinforced with steel box guide reinforcement steel plates 8 and steel box reinforcement braces 6. The steel box reinforcement braces 6 are located at the inner corners of the single-wall steel box cofferdam 1. The pulley 2, steel wire rope 3, winch 4, pull ring 5, and guide pulley 9 are used to guide and locate the installation position of the single-wall steel box cofferdam 1. A water-collecting steel casing 24 is installed on the outside of the single-wall steel box cofferdam 1 to collect and drain water.

[0015] like Figure 2 As shown in the steel box cofferdam guide installation structure diagram, the single-wall steel box cofferdam 1 adopts the cofferdam guide pier 11 to adjust and position the position of the steel box side plate 10, and the steel casing guide pier 12, guide bracket crossbeam 13, guide bracket diagonal brace 14 and jack 15 are arranged on the outer side of the upper part of the steel casing 7 to support and adjust the steel box.

[0016] Among them, the guide support beam 13 is arranged on the outside of the steel casing 7, the guide support brace 14 is used to connect the guide support beam 13 and the steel casing 7, the jack 15 is arranged on the upper part of the guide support beam 13, and the steel casing guide pier 12 is arranged at the end of the jack 15, so that the jack 15 can push the steel casing guide pier 12 to move, and then control the lowering position of the cofferdam guide pier 11 through the steel casing guide pier 12.

[0017] like Figure 3The structural diagram of the steel casing 7 and the water-collecting steel casing 24 shown in the figure shows that a water-collecting steel casing 24 is arranged on the outside of the single-wall steel box cofferdam 1, a steel box reserved water collection ditch 22 and a steel box bottom plate water inlet hole 25 are arranged on the steel box bottom plate 21, a drainage pipe 23 is arranged in the steel box reserved water collection ditch 22 to discharge water into the water-collecting steel casing 24, a back-pressure bracket 33 and a steel casing anchoring hoop 17 are arranged on the steel casing 7 to anchor it with the bottom concrete 34, a hoop connecting plate 19, a hoop fixing bolt 20 and an anchor steel bar 26 are arranged on the steel casing anchoring hoop 17, and a grouting pipe 18 and a leakage repeated grouting pipe 16 are arranged around the steel casing 7 for grouting sealing treatment.

[0018] like Figures 4 and 5 As shown in the structural diagram of the concrete pouring hopper support bracket 27, the single-wall steel hanging box cofferdam 1 adopts the concrete pouring hopper support bracket 27 and the concrete pouring hopper 28 to cast the bottom concrete 34. The concrete pouring hopper support bracket 27 is cross-mounted on the upper part of several steel casings 7. The concrete pouring hopper support bracket 27 is provided with a hopper guide column 29, a hopper diagonal brace 30 and a hopper support crossbeam 31 to support the concrete pouring hopper 28. A hopper conduit 32 is provided at the lower part of the concrete pouring hopper 28.

[0019] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. Construction method of single-wall steel box cofferdam with external steel casing and combined drainage under tidal influence, characterized in that: The following steps are involved: Step 1, construction of steel casing (7): construction of steel casing (7) is carried out, and a water collection steel casing (24) is set outside the cofferdam position; Step 2: Production and installation of a single-wall steel hanging box: Lower the single-wall steel hanging box to the periphery of a plurality of steel casings (7), insert the single-wall steel hanging box into the steel casings (7), and use a steel wire rope (3) and a winch (4) to guide and position the installation position of the single-wall steel hanging box cofferdam (1); Step 3, cofferdam drainage system treatment: a steel box reserved water collection ditch (22) and a steel box bottom plate water inlet hole (25) are provided on the steel box bottom plate (21) of the single-wall steel box cofferdam (1), wherein the steel box bottom plate water inlet hole (25) is connected to the inner side of the single-wall steel box cofferdam (1) and the steel box reserved water collection ditch (22), and a drainage pipe (23) is provided in the steel box reserved water collection ditch (22) to discharge water into the water collection steel casing (24); Step 4, steel casing (7) treatment: The steel casing (7) is anchored to the bottom concrete (34) in the single-wall steel hanging box cofferdam (1) through the back pressure bracket (33) and the steel casing anchoring hoop (17); the single-wall steel hanging box cofferdam (1) is provided with a grouting pipe (18) and an external leakage repeated grouting pipe (16) around the steel casing (7) for grouting and plugging treatment; Step 5, pouring of bottom seal concrete (34): A concrete pouring hopper support bracket (27) is cross-mounted on the upper part of the plurality of steel casings (7). A hopper guide column (29), a hopper diagonal brace (30) and a hopper support crossbeam (31) are provided on the concrete pouring hopper support bracket (27) to support the concrete pouring hopper (28).

2. The construction method of the tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to claim 1 is characterized by: In step 2, one end of the steel wire rope (3) is connected to the four sides of the single-wall steel hanging box through a pull ring (5), and the other end is connected to the winch (4), and the steel wire rope (3) is wound around the pulley (2) and the guide pulley (9) in sequence, so that the single-wall steel hanging box is moved and positioned by the steel wire rope (3) to form a single-wall steel hanging box cofferdam (1).

3. The construction method of the tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to claim 1 is characterized by: In step 2, a cofferdam guide buttress (11) is provided on the inner side of the steel box side plate (10) of the single-wall steel box cofferdam (1), a guide support beam (13) is arranged on the outer side of the steel casing (7), a guide support diagonal brace (14) is used to connect the guide support beam (13) and the steel casing (7), a jack (15) is arranged on the upper part of the guide support beam (13), and a steel casing guide buttress (12) is arranged at the end of the jack (15) so that the jack (15) can push the steel casing guide buttress (12) to move, and the cofferdam guide buttress (11) and the steel casing guide buttress (12) have matching guide inclined surfaces.

4. The construction method of a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to claim 1 is characterized by: Step 4: A hoop connecting plate (19) is provided at both ends of the steel casing anchoring hoop (17), the hoop connecting plates (19) of two adjacent steel casing anchoring hoop (17) are connected by a hoop fixing bolt (20), and a plurality of anchoring steel bars (26) are arranged at intervals on the outside of the steel casing anchoring hoop (17).

5. The construction method of a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to claim 1 is characterized by: A steel box guide reinforcement steel plate (8) and a steel box reinforcement brace (6) are arranged inside the single-wall steel box cofferdam (1), and the steel box reinforcement brace (6) is arranged at the inner corner of the single-wall steel box cofferdam (1).

6. The construction method of a tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to claim 1 is characterized by: In step five, a hopper guide tube (32) is provided at the lower portion of the concrete pouring hopper (28).

7. A tidal-affected single-wall steel hanging box cofferdam with external steel casing and combined drainage, characterized by: It is obtained by the construction method of the tidal-affected external steel casing connected combined drainage single-wall steel hanging box cofferdam according to any one of claims 1-6.

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