Precast concrete construction cofferdam device for irrigation canal
Through the design of combining precast concrete cofferdams with steel plate cofferdams, the problem of poor stability of existing construction cofferdams at the slope in the irrigation canal is solved, efficient and stable dry land construction is achieved, and environmental pollution is reduced.
Patent Information
- Application Number
- CN202421329789.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing irrigation canal construction cofferdam is difficult to achieve stress balance at the slope inclined surface, resulting in poor stability, high labor intensity and easy water seepage, which affects the construction efficiency and ecological environment.
The design is adopted to combine precast concrete cofferdam with steel plate cofferdam. A side skirt base is set at the bottom end of the precast concrete cofferdam. The steel plate cofferdam has an inclined surface, which prevents water seepage through rubber water stops and facilitates construction through lifting.
It has achieved a stable and dry construction space in the irrigation canal, which has reduced labor intensity, improved construction efficiency, and reduced pollution to the ecological environment.
Smart Images
Figure CN222557667U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water conservancy project construction, and specifically relates to a prefabricated concrete construction cofferdam device for irrigation canals. Background Art
[0002] During the operation of irrigation canals, when local maintenance of the canals or equipment modification in the canals is required, construction needs to be carried out in the irrigation canals. Usually, two methods are used: water-stopping construction and non-water-stopping construction. Although water-stopping construction is more convenient for construction, it often requires water-stopping operations coordinated by the water conservancy department, and the construction time is difficult to determine; non-water-stopping construction requires setting up construction cofferdams on the slopes of the canals under the condition of normal operation of the irrigation canals. The water is blocked outside the construction cofferdams through the construction cofferdams, and a dry land working environment is formed inside the construction cofferdams to achieve dry land construction in the canals. There are two types of construction cofferdams: earthbag cofferdams and steel box cofferdams. Earthbag cofferdams are formed by piling up soil in straw bags, sacks, fiberglass bags or non-woven bags. They are labor-intensive and require the earthbags to be staggered and stacked. They are prone to water seepage and are often directly broken by hooks during dismantling, causing certain pollution to the ecological environment. Steel box cofferdams are formed by stacking multiple steel boxes. Due to the pressure of water, it is difficult for steel box cofferdams to achieve force balance on the slope, resulting in easy displacement of the steel box cofferdam along the slope and poor stability. Therefore, a precast concrete construction cofferdam device for irrigation canals should be provided. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a precast concrete construction cofferdam device for irrigation channels in view of the deficiencies in the above-mentioned prior art, which has a simple structure and a reasonable design. After the device is manufactured at the prefabrication site, it is transported and hoisted at the channel construction site, which is convenient for construction and has low labor intensity. The precast concrete cofferdam and two steel plate cofferdams together form a construction space between the bottom surface of the channel and the slope surface. The device is balanced in force in the channel, has high stability, and will not be displaced along the slope surface in the channel.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a precast concrete construction cofferdam device for irrigation canals, characterized in that: it includes a precast concrete cofferdam and two steel plate cofferdams respectively installed on the two end faces of the precast concrete cofferdam, the bottom end of the precast concrete cofferdam is provided with a side skirt base, a connecting steel plate is pre-embedded on the end face of the precast concrete cofferdam, one side of the steel plate cofferdam is installed on the connecting steel plate by a plurality of fastening bolts, the steel plate cofferdam has an inclined surface matching the slope surface, a first rubber waterstop is pre-embedded on the bottom surface of the side skirt base, and a second rubber waterstop is fixedly installed on the inclined surface.
[0005] The above-mentioned precast concrete cofferdam construction device for irrigation canals is characterized in that a connecting seat is provided on one side of the steel plate cofferdam, and a clamping groove matching the exposed end of the connecting steel plate is provided on the connecting seat.
[0006] The above-mentioned precast concrete cofferdam construction device for irrigation canals is characterized in that a sealing gasket is provided between the inner side surface of the mounting groove and the exposed end of the connecting steel plate.
[0007] The above-mentioned precast concrete cofferdam device for irrigation canal construction is characterized in that the precast concrete cofferdam is a semicircular concrete cofferdam or a U-shaped concrete cofferdam.
[0008] The above-mentioned precast concrete cofferdam construction device for irrigation canals is characterized in that: a lifting ring is pre-buried on the precast concrete cofferdam.
[0009] Compared with the prior art, the utility model has the following advantages:
[0010] 1. The utility model sets a precast concrete cofferdam, and a side skirt base is set at the bottom end of the precast concrete cofferdam. Steel plate cofferdams are installed on both end surfaces of the precast concrete cofferdam, and the steel plate cofferdam has an inclined surface matching the slope surface. In actual use, the device is hoisted to the bottom surface of the channel. The precast concrete cofferdam and the two steel plate cofferdams jointly form a construction space between the bottom surface of the channel and the slope surface. When the water in the construction space is drained, a reliable dry land construction space can be formed. Compared with the existing earthbag cofferdam and steel box cofferdam, the device is transported and hoisted at the channel construction site after being manufactured at the prefabrication site, which is convenient for construction and has low labor intensity. The first rubber waterstop is pre-buried on the bottom surface of the side skirt base, and the second rubber waterstop is fixedly installed on the inclined surface. The first rubber waterstop and the second rubber waterstop can both play a role in preventing water seepage, which helps to maintain a dry land environment in the dry land construction space for a long time.
[0011] 2. The utility model provides a side skirt base at the bottom end of the precast concrete cofferdam. The side skirt base helps to resist the water pressure, so that the device can maintain force balance in the channel, improve the stability of the precast concrete cofferdam, and prevent the device from being displaced along the slope surface in the channel.
[0012] 3. When the device of the utility model is applied to another irrigation canal, it is only necessary to reprocess and manufacture a new steel plate cofferdam according to the slope of the slope surface. By dismantling and replacing the steel plate cofferdam, the device can be applied to different irrigation canals, with high reuse rate and good economy.
[0013] 4. The utility model has a simple structure, reasonable design, low manufacturing cost and is easy to promote and apply.
[0014] To sum up, the utility model has a simple structure and a reasonable design. After being manufactured at the prefabrication site, the device is transported and hoisted at the channel construction site, which is convenient for construction and has low labor intensity. The prefabricated concrete cofferdam and the two steel plate cofferdams together form a construction space between the bottom surface of the channel and the slope surface. The device is balanced in force in the channel and has high stability, and will not be displaced along the slope surface in the channel.
[0015] The present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the use state of the utility model.
[0017] Figure 2 The utility model is a schematic diagram of the connection structure between the steel plate and the steel plate cofferdam.
[0018] Figure 3 It is a structural schematic diagram of the steel plate cofferdam of the utility model.
[0019] Description of reference numerals:
[0020] DETAILED DESCRIPTION
[0021] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model includes a precast concrete cofferdam 1 and two steel plate cofferdams 2 respectively installed on the two end faces of the precast concrete cofferdam 1, the bottom end of the precast concrete cofferdam 1 is provided with a side skirt base 1-1, the end face of the precast concrete cofferdam 1 is pre-embedded with a connecting steel plate 1-2, one side of the steel plate cofferdam 2 is installed on the connecting steel plate 1-2 by a plurality of fastening bolts 3, the steel plate cofferdam 2 has an inclined surface 2-1 matching the slope surface 8, a first rubber waterstop 6 is pre-embedded on the bottom surface of the side skirt base 1-1, and a second rubber waterstop 9 is fixedly installed on the inclined surface 2-1.
[0022] In this embodiment, a precast concrete cofferdam 1 is provided, and a side skirt base 1-1 is provided at the bottom end of the precast concrete cofferdam 1. Steel plate cofferdams 2 are installed on both end surfaces of the precast concrete cofferdam 1, and the steel plate cofferdam 2 has an inclined surface 2-1 matching the slope surface 8. In actual use, the device is hoisted onto the bottom surface 7 of the channel. The precast concrete cofferdam 1 and the two steel plate cofferdams 2 jointly form a construction space between the bottom surface 7 of the channel and the slope surface 8. When the water in the construction space is drained, a reliable dry land construction space can be formed. Compared with the existing earthbag cofferdams and steel box cofferdams, the device is transported and hoisted at the channel construction site after being manufactured at the prefabrication site, which is convenient for construction and has low labor intensity. The first rubber waterstop 6 is pre-buried on the bottom surface of the side skirt base 1-1, and the second rubber waterstop 9 is fixedly installed on the inclined surface 2-1. The first rubber waterstop 6 and the second rubber waterstop 9 can both play a role in preventing water seepage, which helps to maintain a dry land environment in the dry land construction space for a long time.
[0023] In this embodiment, a side skirt base 1-1 is provided at the bottom end of the precast concrete cofferdam 1. The side skirt base 1-1 helps to resist the water pressure, enables the device to maintain force balance in the channel, improves the stability of the precast concrete cofferdam 1, and prevents the device from being displaced under the impact of the water flow.
[0024] In actual use, the number of first rubber waterstop strips 6 is determined according to the width of the side skirt base 1-1, and the number of second rubber waterstop strips 9 is determined according to the width of the inclined surface 2-1. In this embodiment, the number of first rubber waterstop strips 6 is 2 or 3, and 2 or 3 first rubber waterstop strips 6 are arranged side by side on the bottom surface of the side skirt base 1-1, and the number of second rubber waterstop strips 9 is 1 or 2.
[0025] In actual use, when the device is applied to another irrigation canal, it is only necessary to reprocess and manufacture a new steel plate cofferdam 2 according to the slope of the slope surface 8. By replacing the steel plate cofferdam 2, the device can be applied to different irrigation canals, with high reuse rate and good economy.
[0026] like Figure 2 and Figure 3 As shown, in this embodiment, a connecting seat 2-2 is provided on one side of the steel plate cofferdam 2, and a clamping groove 2-3 matching with the exposed end of the connecting steel plate 1-2 is opened on the connecting seat 2-2.
[0027] In this embodiment, a sealing gasket 4 is provided between the inner side surface of the mounting groove 2-3 and the exposed end of the connecting steel plate 1-2.
[0028] In actual use, the exposed end of the connecting steel plate 1-2 is detachably connected to the connecting seat 2-2 by multiple fastening bolts 3, the exposed end of the connecting steel plate 1-2 is clamped in the clamping groove 2-3, and a sealing gasket 4 is arranged between the inner side surface of the clamping groove 2-3 and the exposed end of the connecting steel plate 1-2. The sealing gasket 4 can play a sealing role and can reduce the amount of water seepage at the connection position between the steel plate cofferdam 2 and the precast concrete cofferdam 1.
[0029] In actual use, a plurality of fastening bolt mounting holes are provided on the connecting seat 2 - 2 , and the fastening bolt mounting holes are all provided with countersunk heads. When the fastening bolts 3 are installed, the countersunk heads of the fastening bolt mounting holes are all sealed by sealing plugs.
[0030] In this embodiment, the precast concrete cofferdam 1 is a semicircular concrete cofferdam or a U-shaped concrete cofferdam.
[0031] like Figure 1 As shown, in this embodiment, a lifting ring 5 is pre-embedded on the precast concrete cofferdam 1 .
[0032] In actual use, the number of the lifting rings 5 is 3-4, which is convenient for balanced lifting of the device.
[0033] like Figure 1 , Figure 2 and Figure 3 As shown, in actual use, it is only necessary to transport and hoist the prefabricated device to the channel construction site, so that the side skirt base 1-1 is placed on the channel bottom surface 7, and the second rubber water stop 9 on the inclined surface 2-1 is pressed against the slope surface 8. After that, the water in the construction space enclosed by the prefabricated concrete cofferdam 1 and the two steel plate cofferdams 2 on the channel bottom surface 7 and the slope surface 8 is drained, so that a dry construction space is gradually formed inside. After that, local maintenance of the channel or modification of equipment in the channel can be carried out.
[0034] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.
Claims
1. A precast concrete cofferdam device for irrigation canals, characterized in that: The invention comprises a precast concrete cofferdam (1) and two steel plate cofferdams (2) respectively mounted on the two end faces of the precast concrete cofferdam (1); a side skirt base (1-1) is arranged at the bottom end of the precast concrete cofferdam (1); a connecting steel plate (1-2) is pre-embedded on the end face of the precast concrete cofferdam (1); one side of the steel plate cofferdam (2) is mounted on the connecting steel plate (1-2) by a plurality of fastening bolts (3); the steel plate cofferdam (2) has an inclined surface (2-1) matching the slope surface (8); a first rubber water stop (6) is pre-embedded on the bottom face of the side skirt base (1-1); and a second rubber water stop (9) is fixedly mounted on the inclined surface (2-1).
2. A precast concrete cofferdam device for irrigation canals according to claim 1, characterized in that: A connecting seat (2-2) is provided on one side of the steel plate cofferdam (2), and a clamping groove (2-3) matching with the exposed end of the connecting steel plate (1-2) is provided on the connecting seat (2-2).
3. A precast concrete cofferdam device for irrigation canals according to claim 2, characterized in that: A sealing gasket (4) is provided between the inner side surface of the clamping groove (2-3) and the exposed end of the connecting steel plate (1-2).
4. A precast concrete cofferdam device for irrigation canals according to claim 1, characterized in that: The prefabricated concrete cofferdam (1) is a semicircular concrete cofferdam or a U-shaped concrete cofferdam.
5. A precast concrete cofferdam device for irrigation canals according to claim 1, characterized in that: A lifting ring (5) is pre-buried on the precast concrete cofferdam (1).