Channel non-stop water repair cofferdam with uniform load balancing mechanism

Abstract

The utility model discloses a channel non-stop water repair cofferdam with a uniform load balancing mechanism, which comprises a channel bottom cofferdam, a side slope cofferdam and an angle adaptive joint for connecting the channel bottom cofferdam and the side slope cofferdam, and the channel bottom cofferdam and the side slope cofferdam are both provided with supports connected with a channel lining; the uniform-load balancing mechanism is arranged at the bottom of the support and comprises a load reducing bin of a cavity structure, a uniform-load bin is arranged below the load reducing bin, and a uniform-load cavity of the uniform-load bin is defined by a bottom plate of the load reducing bin, a flexible uniform-load plate arranged below the bottom plate and a mounting seat connecting the bottom plate and the flexible uniform-load plate; a water conveying pipe with the bottom communicated with the uniform load cavity is arranged in the load reduction bin, two branch pipes penetrating through the side wall of the load reduction bin and extending outwards are arranged at the top of the water conveying pipe, one branch pipe is connected with a water filling valve, and the other branch pipe is connected with a pressure regulating valve. The device can be quickly assembled according to the channel slope ratio, the application water depth and the size of a repair area, the pressure on a channel lining is balanced, meanwhile, the local pressure is prevented from exceeding the bearing capacity of a channel foundation, and the safety of an underwater building is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of operation and maintenance of water conservancy projects, in particular to a cofferdam for repairing a channel without stopping water, which is provided with a load sharing and balancing mechanism. Background Art

[0002] The water diversion and regulation project has effectively alleviated the severe situation of uneven distribution of water resources in China. At present, there are more and more large-scale long-distance water diversion and regulation projects under construction and already in operation. The main canal of the water diversion and regulation project operates in a single line. As an irreplaceable water source in the water receiving area, it does not have the condition of stopping water for maintenance. Therefore, the dry repair technology of the cofferdam without stopping water is mostly adopted. The cofferdam used for repairing channels with high water heads and large areas has many structural units, large component sizes, heavy self-weights, difficult installation, high costs, and can only be used for repairing channel slopes with the same inclination angle, and its versatility is not strong. Secondly, when the cofferdam is assembled on the shore and then installed underwater, it is moved into place by relying on traction equipment, and the traction force needs to be greater than the component force of the cofferdam's self-weight along the slope direction. However, the berm on the top of the channel slope is usually narrow, and there is not enough space to set up large-tonnage traction equipment. When the self-weight of the cofferdam is large, the assembly operation cannot be carried out; after being in place, it is necessary to pump water inside the cofferdam to form a dry construction environment. At this time, the water pressure is transmitted to the channel foundation through the support, and when the load transmission is uneven, it is easy to cause secondary damage to the slope lining. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides a cofferdam for repairing a channel without stopping water, which is provided with a load sharing and balancing mechanism, and the following specific technical solutions can be adopted:

[0004] The cofferdam for repairing a channel without stopping water, which is provided with a load sharing and balancing mechanism, includes a bottom cofferdam of the channel, a slope cofferdam, and an angle adaptor connecting the two. The bottom cofferdam of the channel and the slope cofferdam are both provided with supports connected to the channel lining; the load sharing and balancing mechanism is arranged at the bottom of the support, and includes a load reduction bin with a cavity structure. A load sharing bin is arranged below the load reduction bin. The load sharing cavity of the load sharing bin is enclosed by the bottom plate of the load reduction bin, a flexible load sharing plate arranged below it, and a mounting seat connecting the two; a water delivery pipe with its bottom communicating with the load sharing cavity is arranged in the load reduction bin. Two branch pipes passing through the side wall of the load reduction bin and extending outwards are arranged at the top of the water delivery pipe. One of the branch pipes is connected to a water filling valve, and the other is connected to a pressure regulating valve.

[0005] The angle adaptor is arranged along the water flow direction. Its near-water side is a near-horizontal plane connected to the bottom cofferdam of the channel, and its near-shore side is a near-shore plane connected to the slope cofferdam. The included angle between the near-horizontal plane and the near-shore plane is determined by the inclination angle of the channel slope.

[0006] Both the bottom weir and the slope weir of the channel are of assembled structure. Each assembled section is composed of a panel and the support arranged below it. There is one support for each assembled section of the bottom weir of the channel, and two supports for each assembled section of the slope weir of the channel. An evenly loaded balancing mechanism is arranged at the bottom of each support.

[0007] The bottom plate of the load reduction bin is a flat steel plate, the flexible evenly loaded plate is a pressure-resistant composite rubber plate, the mounting seat is composed of a seat body, a pressing plate and bolts connecting the two. The seat body includes a vertical plate arranged circumferentially along the periphery of the bottom plate of the load reduction bin and welded to it. The bottom of the vertical plate extends horizontally inward to form a support plate. A sealing protrusion is arranged on the bottom surface of the support plate. The pressing plate is a closed annular plate, and a sealing groove matching with the protrusion is arranged on it. The flexible evenly loaded plate is arranged between the support plate and the pressing plate and connected by the bolts.

[0008] The channel non-stop water repair weir with an evenly loaded balancing mechanism provided by the utility model is of modular assembly structure, which is convenient for transportation. The corresponding number of modules can be selected according to the channel slope ratio, the application water depth and the size of the repair area for rapid assembly, providing a safe and stable dry construction environment for the non-stop water repair of the channel, and solving the problem of non-stop water repair after large-area damage of the channel slope. Secondly, through the evenly loaded balancing mechanism, the bottom surface of the support can be in close contact with the channel lining, and the pressure of the weir on the channel lining can be balanced. At the same time, the local pressure of the weir support exceeding the bearing capacity of the channel foundation can be avoided, ensuring the safety of underwater buildings. Through the load reduction bin in the evenly loaded balancing mechanism, an upward buoyancy force is generated during the installation and sliding process of the weir, greatly reducing the capacity of the traction equipment required for the installation of the weir, so that the large-area repair weir can be applied. Description of the Drawings

[0009] Figure 1 is the structural schematic diagram of the utility model.

[0010] Figure 2 is Figure 1 the sectional structural schematic diagram after being in place along the channel slope.

[0011] Figure 3 is Figure 1 the structural schematic diagram of the assembled section at the upstream of the bottom weir of the channel in

[0012] Figure 4 is Figure 1 the structural schematic diagram of the assembled section at the middle of the bottom weir of the channel in

[0013] Figure 5 is Figure 1 the structural schematic diagram of the assembled section at the upstream of the slope weir of the channel in

[0014] Figure 6 is Figure 1Schematic diagram of the assembled section located in the middle of the slope cofferdam.

[0015] Figure 7 is Figure 6 The right view of.

[0016] Figure 8 is Figure 1 Schematic diagram of the structure of the uniform load balancing mechanism in.

[0017] Figure 9 is Figure 8 The enlarged view of part A in. Specific implementation mode

[0018] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation modes and specific construction processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0019] Such as Figure 1-9 As shown, the channel non-stop water repair cofferdam with a uniform load balancing mechanism of the present utility model includes a bottom cofferdam 1, a slope cofferdam 2, and an angle adapter section 3 connecting the two.

[0020] The above-mentioned angle adapter section 3 is arranged along the water flow direction. Its near-water side is a near-horizontal plane connected to the bottom enclosure 1, and its near-shore side is a near-shore plane connected to the slope enclosure 2. When the shape of the bottom cofferdam 1 is fixed, the included angle between the near-horizontal plane and the near-shore plane of the angle adapter section 3 is determined by the inclination angle of the channel slope. An appropriate angle adapter section 3 can be selected according to the inclination angle of the channel slope, so that the top surface of the slope cofferdam 2 is parallel to the channel slope, facilitating personnel to enter the cofferdam for subsequent repair work.

[0021] For the convenience of transportation and installation, both the bottom cofferdam 1 and the slope cofferdam 2 on both sides of the angle adapter section 3 adopt a prefabricated structure. The assembled sections constituting the bottom cofferdam 1 are sequentially connected along the water flow direction, and the assembled sections constituting the slope cofferdam 2 are first connected in groups in sequence according to the length of the bottom cofferdam 1, and then the assembled slope cofferdam sections in groups are sequentially spliced upward along the channel slope until they are exposed above the water surface. The above-mentioned assembled sections are all composed of a panel 4 and a support 5 located below it. Adjacent panels are connected to each other to realize the assembly between the assembled sections, and the angle adapter section 3 is also assembled with the bottom cofferdam 1 and the slope cofferdam 2 by connecting with the panel of the assembled section. In order to reduce water resistance, the panels of the bottom cofferdam assembled sections and the slope cofferdam assembled sections near the upstream and downstream of the water flow adopt an arc surface structure, while the panels of the bottom cofferdam assembled sections and the slope cofferdam assembled sections located in the middle part adopt a plane structure.

[0022] Generally, there is one support 5 for each assembled section of the bottom channel cofferdam 1. For each assembled section of the side slope cofferdam 2, two supports 5 are arranged at intervals along the water flow direction, and a load equalizing mechanism is provided at the bottom of each support 5. Specifically, as Figure 3 , 4 shown, the support 5 of the assembled section of the bottom channel cofferdam 1 is an integral structure connected to the panel 4, with a frame type above and a load equalizing mechanism connected to the channel slope surface below. As Figure 5 shown, one support 5 of the assembled section of the side slope cofferdam 2 at the upstream and downstream is integrally arranged near the side of the arc surface panel, and a load equalizing mechanism connected to the channel slope surface is provided below it; the other support 5 includes a hydraulic cylinder 51 arranged below the panel, and a load balancing mechanism is connected below the hydraulic cylinder; as Figure 6 , 7 shown, the two supports 5 of the assembled section of the side slope cofferdam 2 in the middle are arranged at intervals, and both include a hydraulic cylinder 51 connected to the panel, and a load balancing mechanism is connected below the hydraulic cylinder 51.

[0023] Each load equalizing mechanism includes a load reducing bin 6 with a cavity structure and a load equalizing bin 7 located below it. The load equalizing cavity of the above load equalizing bin 7 is enclosed by the bottom plate 71 of the load reducing bin 6, a flexible load equalizing plate 72 connected to the channel lining, and a mounting seat 73 connecting the two. Specifically, the bottom plate 71 of the load reducing bin 6 is made of flat steel plate, the flexible load equalizing plate 72 is made of composite pressure-resistant rubber plate for rubber dam, and the mounting seat 73 is composed of a steel seat body 731, a pressing plate 732, and bolts 733 connecting the two. The cross-section of the above seat body 731 is an L-shaped structure (see Figure 9 ), which includes a vertical plate welded to the periphery of the bottom plate 71 of the load reducing bin in a circumferential manner, and the bottom of the vertical plate has an integrally formed horizontally inward extending support plate, and a sealing protrusion 734 is arranged on the bottom surface of the support plate; the pressing plate 732 is a closed annular plate with the same shape as the support plate, and a sealing groove 735 matching the sealing protrusion 734 is arranged on it. Corresponding bolt holes are arranged at intervals on the above support plate and the pressing plate 732, and the nuts are welded to the inner upper edge of the L-shaped structure after drilling. When installing the flexible load equalizing plate 72, place the flexible load equalizing plate 72 on the support plate of the seat body 731, then press the pressing plate 732 on the edge of the flexible load equalizing plate 72, and fasten the support plate, the flexible load equalizing plate 72, and the pressing plate 732 together through the bolts 733. The protrusion 734 and the groove 735 press and engage the load equalizing plate 72 to achieve the water tightness of the load equalizing chamber. A water delivery pipe 81 with its bottom connected to the load equalizing chamber is arranged in the above load reducing bin 6. The top of the water delivery pipe 81 is provided with two branch pipes passing through the side wall of the load reducing bin 6 and extending outward. One branch pipe is connected to a water filling valve 82, and the other branch pipe is connected to a pressure regulating valve 83.

[0024] The above pressure regulating valve 83 is used to adjust the pressure value of the load equalizing chamber 7. It calculates the pressure values at the bottoms of the assembled segments after the cofferdam is evacuated according to the working conditions of the cofferdam application, and makes preset before assembly. Usually, during the process of the cofferdam being installed underwater, the center of buoyancy and the center of gravity of each assembled segment of the bottom cofferdam 1 in the canal are made to coincide and have the same height. Its buoyancy is 1.1 - 1.2 times the gravity, enabling the bottom cofferdam in the canal to be installed by floating. Then the angle adaptation segment 3 is installed, and finally the slope cofferdam 2 is installed on the slope. The setting of the load reduction chamber enables the floating installation of the bottom cofferdam in the canal to be realized, avoiding the problem of bottom leveling faced during slope installation. At the same time, the buoyancy of each assembled segment of the slope cofferdam 2 is made to be 0.7 - 0.8 times the gravity, thereby reducing the total capacity of the cofferdam sliding traction system. After the cofferdam is in place, the inside of the cofferdam is pumped. As the water level inside the cofferdam drops, the load equalizing chamber 7 is pressurized through the water filling valve 82 of each load equalizing mechanism. When each support 5 of the cofferdam is in contact with the canal slope lining, since the medium in the load equalizing chamber 7 is water and the load equalizing chamber 7 is in contact with the canal slope through the flexible load equalizing plate 72, the upper load can be evenly transmitted to the canal slope, avoiding secondary damage to the canal slope lining caused by excessive local load.

[0025] It should be noted that in the description of the present invention, terms indicating the orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A cofferdam for repairing a channel without stopping water flow, which is characterized in that: The cofferdam includes a bottom cofferdam of the channel, a slope cofferdam, and an angle adapter connecting the two. The bottom cofferdam of the channel and the slope cofferdam are both provided with supports connected to the channel lining. The uniform load balancing mechanism is arranged at the bottom of the support and includes a load-reducing bin with a cavity structure. A uniform load bin is arranged below the load-reducing bin. The uniform load cavity of the uniform load bin is enclosed by the bottom plate of the load-reducing bin, a flexible uniform load plate arranged below it, and a mounting seat connecting the two. A water delivery pipe with its bottom connected to the uniform load cavity is arranged in the load-reducing bin. Two branch pipes passing through the side wall of the load-reducing bin and extending outwards are arranged at the top of the water delivery pipe. One of the branch pipes is connected to a water filling valve, and the other is connected to a pressure regulating valve.

2. The cofferdam for non-stop water repair of the channel with a load-sharing and balancing mechanism according to claim 1, characterized in that: The angle adapter is arranged along the water flow direction. Its near-water side is a near-horizontal plane connected to the bottom enclosure of the channel, and its near-shore side is a near-shore plane connected to the slope enclosure. The included angle between the near-horizontal plane and the near-shore plane is determined by the inclination angle of the channel slope.

3. The cofferdam for repairing a channel without stopping water flow, which has a load-sharing balance mechanism according to claim 1, is characterized in that: Both the bottom cofferdam of the channel and the slope cofferdam are of assembled structure. Each assembled section is composed of a panel and the support arranged below it. There is one support for each assembled section of the bottom cofferdam of the channel, and two supports for each assembled section of the slope cofferdam. A uniform load balancing mechanism is arranged at the bottom of each support.

4. The cofferdam for repairing channels without stopping water flow with a load sharing and balancing mechanism according to claim 3, characterized in that: The bottom plate of the load-reducing bin is a flat steel plate. The flexible uniform load plate is a pressure-resistant composite rubber plate. The mounting seat is composed of a seat body, a pressing plate, and bolts connecting the two. The seat body includes a vertical plate arranged circumferentially along the periphery of the bottom plate of the load-reducing bin and welded to it. The bottom of the vertical plate extends horizontally inwards to form a support plate. A sealing protrusion is arranged on the bottom surface of the support plate. The pressing plate is a closed annular plate, and a sealing groove matching the protrusion is arranged on it. The flexible uniform load plate is arranged between the support plate and the pressing plate and connected by the bolts.

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