Improved matched mounting device for construction cofferdam

Abstract

The utility model provides an improved matched mounting device for a construction cofferdam, which is arranged in an L shape along a tunnel and is supported at the top of a tunnel bottom plate. The matched mounting device comprises a steel framework; the steel framework comprises two rows of steel columns which are vertically arranged, the bottom ends and the top ends of the two rows of steel columns which are oppositely arranged are fixedly connected through steel beams to form a quadrilateral frame, and inner supporting rods are diagonally arranged in the quadrilateral frame. The quadrilateral frames are connected with one another through four longitudinal horizontal steel beams up and down to form a space structure; the vertical steel columns and the outer sides of the longitudinal horizontal steel beams on the two sides are sealed through thin steel plates, the outer side of the longitudinal horizontal steel beam at the bottom is sealed through thin steel plates, and then a three-face enclosure hollow structure is formed. According to the matched installation device, a quasi-still water area can be manufactured for installation of the tunnel underwater cofferdam, the adverse effect of tunnel water flow impact on cofferdam installation is effectively avoided, then the cofferdam installation efficiency is effectively improved, and the cofferdam installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel maintenance, in particular to a matching installation device for an improved construction cofferdam. Background Art

[0002] Hydraulic tunnels are enclosed waterways typically excavated through mountains to convey water or discharge floodwaters in water conservancy projects. In addition to conveying canal water for agricultural irrigation, urban domestic water, and industrial water across river basins, hydraulic tunnels also provide drainage and diversion.

[0003] Over extended periods of operation, hydraulic tunnels are prone to floor wear and tear, leading to exposed and corroded reinforcement. Without thorough inspection and repair, these risks gradually accumulate, ultimately leading to structural collapse. Accidental incidents can cause significant economic losses and social impact. Conventional maintenance methods for hydraulic tunnels often involve shutting off the flow of water to create a dry environment before conducting inspections and repairs. This water-deprivation approach fails to meet the needs of both people and production.

[0004] To enable repairs to damaged areas without diverting flow, cofferdams are currently commonly used to create a water-free environment by enclosing the area requiring repair. However, during cofferdam installation, the rapid impact of the water flow inside the tunnel makes cofferdam installation inconvenient and inefficient. Utility Model Content

[0005] In order to solve the current technical problems, the main purpose of the utility model is to provide an improved supporting installation device for construction cofferdams. This supporting installation device can create a quasi-static water area for the installation of the underwater cofferdam of the tunnel, effectively avoiding the adverse effects of the impact of the tunnel water flow on the cofferdam installation, thereby effectively improving the installation efficiency of the cofferdam and reducing the difficulty of the cofferdam installation; and the supporting installation device does not completely cut off the water flow of the tunnel, does not affect the transportation and use of the water flow, and can perform drilling, local repair and other operations on the bottom plate, which is suitable for popularization and use.

[0006] In order to achieve the above technical features, the purpose of the utility model is achieved as follows: an improved supporting installation device for construction cofferdam, wherein the supporting installation device is arranged in an L shape along the tunnel and supported on the top of the tunnel floor;

[0007] The supporting installation device includes a steel frame; the steel frame includes two rows of vertically arranged steel columns, the bottom ends and top ends of the two oppositely arranged rows of steel columns are fixedly connected by steel beams to form a quadrilateral frame, and the interior of the quadrilateral frame is provided with internal support rods at diagonals;

[0008] Multiple groups of quadrilateral frames are connected to each other through four upper and lower longitudinal horizontal steel beams to form a spatial structure;

[0009] The vertical steel columns and the outer sides of the longitudinal horizontal steel beams on both sides are sealed with thin steel plates, and the outer sides of the longitudinal horizontal steel beams at the bottom are also sealed with thin steel plates, thus forming a hollow structure enclosed on three sides.

[0010] The matching installation device is arranged on the upstream side of the cofferdam to be installed, and the enclosure is arranged on the periphery of the cofferdam to be installed.

[0011] The bottom end of the matching installation device is provided with a sponge layer, and the sponge layer is in contact with and matched with the tunnel bottom plate.

[0012] A water pump is provided inside the hollow structure, and water is injected or drained into the hollow structure by the water pump to achieve the sinking or rising of the supporting installation device.

[0013] Foam boards are fixedly mounted on both sides of the bottom of the steel frame through U-shaped mounting grooves.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model discloses an improved supporting installation device for construction cofferdam. Through the L-shaped supporting installation device, the water in the tunnel bypasses the device and flows to the downstream. The staff can work safely inside the device. The cofferdam does not completely block the water flow in the tunnel and does not affect the transportation and use of the water flow. The cofferdam support can be installed and local maintenance can be carried out on the tunnel bottom plate, which is suitable for popularization and use.

[0016] 2. By setting supports on the inner side of the supporting installation device and injecting water into the cavity, the supporting installation device and the steel frame can jointly resist the pressure generated by the external water flow, so that the supporting installation device has stability.

[0017] 3. Install flexible industrial sponge at the bottom of the steel frame to ensure close contact with the base plate.

[0018] 4. The supporting installation devices are manufactured in sections at the factory, transported to the site and connected by bolts to assemble into a whole.

[0019] 5. The supporting installation device is moved by traction equipment, which greatly saves labor.

[0020] 6. A water pump is installed on the supporting installation device to use drainage and water injection to change the weight of the supporting installation device, causing the device to sink and float. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 The utility model discloses a plan view of a supporting installation device for an improved construction cofferdam.

[0023] Figure 2 The utility model discloses a matched mounting device of improved construction cofferdam section view schematic drawing.

[0024] Figure 3 The utility model discloses a matched mounting device of improved construction cofferdam elevation schematic view.

[0025] In the drawing: steel skeleton 1, thin steel sheet 2, sponge layer 3, foam board 4, water pump 5;

[0026] Steel column 11, steel beam 12, inner support rod 13, longitudinal horizontal steel beam 14, to be installed cofferdam 15, tunnel 16, U type mounting groove 17. Specific implementation

[0027] The embodiment of the utility model is further explained below in combination with the drawings.

[0028] Referring to Figure 1-3 A matched mounting device of improved construction cofferdam, the matched mounting device is arranged L type along tunnel 16 and is supported on the top of tunnel floor S, the matched mounting device includes steel skeleton 1, steel skeleton 1 includes two rows of vertically arranged steel column 11, and the bottom end and the top end of the oppositely arranged two rows of steel column 11 are fixedly connected through steel beam 12 and form a quadrilateral frame, and the inner diagonal of the quadrilateral frame is provided with inner support rod 13, and the upper and lower four longitudinal horizontal steel beams 14 of the multiple groups of quadrilateral frames are connected with each other, forming a space structure, and the vertical steel column 11 and the outer side of the longitudinal horizontal steel beam 14 on both sides are sealed with thin steel sheet 2, and the outer side of the longitudinal horizontal steel beam 14 at the bottom is sealed with thin steel sheet 2, thereby forming a three-sided enclosed hollow structure. This matched mounting device can install and manufacture a quasi-still water area for the underwater cofferdam of the tunnel, effectively avoiding the adverse effects of the water flow impact on the cofferdam installation, thereby effectively improving the installation efficiency of the cofferdam and reducing the installation difficulty of the cofferdam, and the matched mounting device does not completely cut off the water flow of the tunnel, does not affect the transportation and use of the water flow, can perform punching, local repair and other operations on the floor, and is suitable for popularization and use.

[0029] Further, the matched mounting device is arranged on the upstream side of the to-be-installed cofferdam 15 and encloses the periphery of the to-be-installed cofferdam 15. By adopting the above arrangement, a still water environment can be created for the area of the to-be-installed cofferdam 15, thereby effectively avoiding the impact of water flow on the subsequent installation process of the to-be-installed cofferdam 15.

[0030] Further, the bottom end of the matched mounting device is provided with a sponge layer 3, and the sponge layer 3 is in contact with the tunnel floor S. By adopting the sponge layer 3, the uneven tunnel floor S can be better contacted, thereby achieving the sealing effect to form a relatively still water environment inside.

[0031] Furthermore, a water pump 5 is provided within the hollow structure, which is used to inject or drain water into or out of the hollow structure to achieve the sinking or raising of the supporting installation device. Water injection by the water pump 5 causes the supporting installation device to sink, and the industrial sponge 3 at the bottom contacts the bottom plate S, creating a quasi-hydrostatic state within the area enclosed by the supporting installation device. Draining water by the water pump 5 causes the supporting installation device to float up or down, at which point it can be moved using traction equipment or manually.

[0032] Furthermore, foam plates 4 are fixedly mounted on both sides of the bottom of the steel frame 1 through U-shaped mounting grooves 17. The foam plates 4 facilitate the supporting mounting device to float on the water during movement, thereby facilitating its transportation.

[0033] Furthermore, the device boasts advantages such as light weight and excellent stability. It can be manufactured off-site in sections and then assembled on-site using bolts. This construction method allows for the installation of underwater cofferdam supports and localized floor repairs without interrupting water flow, effectively meeting both living and production needs.

[0034] Furthermore, the steel frame is connected to the steel columns through steel beams in two directions and supported to enhance the overall rigidity and strength.

[0035] Furthermore, the supporting installation device is manufactured in sections at the factory and then connected by bolts.

[0036] Furthermore, the end of the supporting installation device is obliquely intersected with the tunnel, which effectively reduces the water flow resistance.

[0037] Working process and principle of this utility model:

[0038] When the cofferdam needs to be installed, in order to ensure its normal installation, it is necessary to first arrange the supporting installation device. The supporting installation device is arranged along the L-shape of the tunnel and is used to be placed on the tunnel bottom plate S. In this embodiment, the supporting installation device is composed of a steel frame + thin steel plate. When actually used, it is placed vertically on the tunnel bottom plate S. The steel frame 1 includes two vertical rows of steel columns 11, two horizontal rows of steel beams 12, internal support rods 13 and four longitudinal steel beams 14. The two vertical rows of steel columns 11 are connected by two horizontal upper and lower rows of steel beams 12 to form a quadrilateral frame. The inner support rods 13 are arranged diagonally on the quadrilateral frame to form a stable structure. The quadrilateral frame is then connected to the adjacent quadrilateral frames through four upper and lower longitudinal horizontal steel beams 14 to form a spatial structure;

[0039] Then, the vertical steel columns 11 and the outer sides of the longitudinal horizontal steel beams 14 on both sides are sealed with thin steel plates 2, and the outer sides of the longitudinal horizontal steel beams 14 at the bottom are sealed with thin steel plates 2, thus forming a hollow structure with three-sided enclosure; and industrial sponge 3 is installed at the bottom of the steel frame 1, and low-density foam boards 4 are installed on both sides;

[0040] At the same time, the supporting installation device uses the water pump 5 to pump water into the steel frame cavity, causing the device to sink. The industrial sponge 3 is in close contact with the tunnel floor S, and a quasi-hydrostatic state is formed in the supporting installation device area. The supporting installation device uses the water pump 5 to drain the water in the steel frame cavity, causing the device to float and be moved by the traction equipment.

[0041] The supporting installation device can be manufactured in sections in the factory according to the size of the project, and then transported to the site to connect the parts together through bolts; after the supporting installation device is installed, the installation construction of the cofferdam 15 to be installed can be carried out.

Claims

1. An improved supporting installation device for construction cofferdam, characterized in that: The supporting installation device is arranged in an L-shape along the tunnel (16) and supported on the top of the tunnel floor (S); The supporting installation device comprises a steel frame (1); the steel frame (1) comprises two rows of steel columns (11) arranged vertically, the bottom ends and top ends of the two rows of steel columns (11) arranged opposite to each other are fixedly connected by steel beams (12) to form a quadrilateral frame, and internal support rods (13) are arranged diagonally inside the quadrilateral frame; The multiple quadrilateral frames are connected to each other through four upper and lower longitudinal horizontal steel beams (14) to form a spatial structure; The outer sides of the vertical steel columns (11) and the longitudinal horizontal steel beams (14) on both sides are sealed with thin steel plates (2), and the outer sides of the longitudinal horizontal steel beams (14) at the bottom are sealed with thin steel plates (2), thereby forming a hollow structure enclosed on three sides.

2. The supporting installation device for the improved construction cofferdam according to claim 1 is characterized in that: The matching installation device is arranged on the upstream side of the cofferdam (15) to be installed, and the enclosure is arranged on the periphery of the cofferdam (15) to be installed.

3. The supporting installation device for the improved construction cofferdam according to claim 1 is characterized in that: A sponge layer (3) is provided at the bottom end of the matching installation device, and the sponge layer (3) is in contact with and cooperates with the tunnel bottom plate (S).

4. The supporting installation device for the improved construction cofferdam according to claim 1 is characterized in that: A water pump (5) is provided inside the hollow structure, and water is injected or drained into the hollow structure by the water pump (5) to achieve the sinking or rising of the matching installation device.

5. The supporting installation device for the improved construction cofferdam according to claim 1 is characterized in that: Foam plates (4) are fixedly mounted on both sides of the bottom of the steel frame (1) via U-shaped mounting grooves (17).

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