Canal non-cutoff rapid repair extensible cofferdam

Abstract

The utility model discloses a channel non-cutoff rapid repair extensible cofferdam. The cofferdam comprises a channel bottom fence, a side slope fence and an angle adaptation joint which are arranged in a segmented mode. The angle adaptation joint is arranged in the downstream direction and provided with a near-horizontal plane connected with the channel bottom enclosure and a near-shore plane connected with the side slope enclosure. The channel bottom enclosure is arranged on the channel bottom plane, the bottom water passing surface of the channel bottom enclosure is vertically arranged, and the connecting surface connected with the near-horizontal plane is obliquely arranged; the side slope fence is arranged along the side slope, and the connecting face connected with the near-shore plane is perpendicular to the side slope. First water stop structures are arranged between the adjacent channel bottom fences, between the adjacent side slope fences, between the adjacent angle adaptive sections, between the channel bottom fences and the angle adaptive sections and between the side slope fences and the angle adaptive sections; and second water stop structures are arranged between the channel bottom fences, the side slope fences and the angle adaptive sections and the contact surface of the channel. According to the utility model, flexible combination and rapid assembly can be realized, a dry construction environment is provided, 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 an expandable cofferdam for rapid repair of channels without interruption of water flow. Background Art

[0002] The water diversion and regulation project has effectively alleviated the severe situation of uneven distribution of water resources in China. Currently, there are more and more large-scale long-distance water diversion and regulation projects under construction and 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. The channel conveys water continuously throughout the year, or is affected by extreme weather, there will be durability and water damage problems. For small-area damage to the canal slope, underwater non-dispersible concrete pouring, underwater installation of precast concrete lining plates by divers, etc. are often used; for large-area damage, the dry-land repair technology of cofferdam without stopping water is mostly used. However, restricted by transportation conditions and installation conditions, the existing cofferdams are small in volume, generally only able to cover an area with a length of 9m along the water flow direction, and the cofferdams customized according to the inclination angle of the canal slope cannot be applied to the repair of other canal slopes, resulting in great waste. Secondly, when the cofferdam is assembled on the shore and installed underwater, it relies on traction equipment to move into place, and the traction force needs to be greater than the component force of the self-weight of the cofferdam along the slope direction. The access road on the top of the channel slope is usually narrow, and there is not enough space to set large-tonnage traction equipment. When the self-weight of the cofferdam is large, it will be impossible to assemble and use; after being in place, it is necessary to pump water inside the cofferdam to form a dry-land 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. Thirdly, due to the large area of the cofferdam, the existing water stop structure often cannot meet the requirements of forming a dry-land environment for the cofferdam. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides an expandable cofferdam for rapid repair of channels without interruption of water flow, and the following specific technical solutions can be adopted:

[0004] The quick-repair expandable cofferdam for channels without flow interruption of the utility model includes a bottom enclosure, a slope enclosure, and an angle adapter section arranged in segmented sections. The angle adapter section is arranged along the water flow direction. The near-water side of the angle adapter section is a near-horizontal plane connected to the bottom enclosure, and the near-shore side of the angle adapter section is a near-shore plane connected to the slope enclosure. The bottom enclosure is arranged on the bottom plane of the channel. The water-facing surface and the back water-facing surface of the bottom enclosure are both arranged in an arc shape. The water-passing surface at the bottom of the bottom enclosure is arranged vertically. The connecting surface of the bottom enclosure connected to the near-horizontal plane is arranged obliquely. The slope enclosure is arranged along the slope. The water-facing surface and the back water-facing surface of the slope enclosure are both arranged in an arc shape. The connecting surface of the slope enclosure connected to the near-shore plane is arranged perpendicular to the slope. A first water-stop structure is arranged between adjacent bottom enclosures, between adjacent slope enclosures, between adjacent angle adapter sections, between the bottom enclosure and the angle adapter section, and between the slope enclosure and the angle adapter section. A second water-stop structure is arranged between the contact surfaces of the bottom enclosure, the slope enclosure, and the angle adapter section with the bottom / slope.

[0005] The bottom enclosure is spliced by a water-facing bottom foundation unit and a back water-facing bottom foundation unit, or is spliced by the water-facing bottom foundation unit, the back water-facing bottom foundation unit, and at least one group of bottom expansion units located between the two.

[0006] The slope enclosure is spliced by a water-facing slope foundation unit, a back water-facing slope foundation unit, and an entrance unit, or is spliced by the water-facing slope foundation unit, the back water-facing slope foundation unit, at least one slope expansion unit located between the two, and the entrance unit.

[0007] The water-facing bottom foundation unit, the back water-facing bottom foundation unit, the bottom expansion unit, the water-facing slope foundation unit, the back water-facing slope foundation unit, the slope expansion unit, and the entrance unit are all composed of a panel unit and a bottom support. And lifting mobile wheels are arranged on both sides of the water-facing slope foundation unit and the back water-facing slope foundation unit, outside the panel of the entrance unit, and at the bottom of the bottom support of the slope expansion unit.

[0008] The bottom supports of the water-facing bottom foundation unit, the back water-facing bottom foundation unit, the bottom expansion unit, and the entrance unit are all fixed structures. The bottom support of the slope expansion unit is a movable structure, and each slope expansion unit includes two bottom supports arranged at intervals along the water flow direction. Each water-facing slope foundation unit and each back water-facing slope foundation unit are provided with two bottom supports, one of which is a fixed structure and the other is a movable structure.

[0009] A load-sharing and balancing mechanism is provided at the bottom of the bottom support. The load-sharing and balancing mechanism includes a load-reducing bin with a cavity structure. A load-sharing bin is provided below the load-reducing bin. The load-sharing cavity of the load-sharing bin is enclosed by the bottom plate of the load-reducing bin, a flexible load-sharing plate provided below it, and a mounting seat connecting the two. A water delivery pipe with its bottom connected to the load-sharing cavity is provided in the load-reducing bin. At the top of the water delivery pipe, there are two branch pipes passing through the side wall of the load-reducing bin and extending outwards. One of the branch pipes is connected to a water filling valve, and the other is connected to a pressure regulating valve.

[0010] The bottom plate of the load-reducing bin is a flat steel plate. The flexible load-sharing 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 circumferentially arranged 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 provided 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 provided on it. The flexible load-sharing plate is arranged between the support plate and the pressing plate and connected by the bolts.

[0011] The first water stop structure includes a water stop seat, a first water stop rubber, and a second water stop rubber. The water stop seat is arranged in the splicing seam of adjacent panel units. The first water stop rubber is arranged on the top of the panel unit and covers the splicing seam. The second water stop rubber is arranged between the water stop seat and the first water stop rubber. The top surface of the second water stop rubber is a flat structure provided with a reverse stop groove. The bottom surface of the second water stop rubber is an arc structure connected to the water stop seat. The two sides of the second water stop rubber are hermetically connected to the panel unit. A first deformation cavity is provided in the middle of the second water stop rubber.

[0012] Anti-warping arc edges are provided on both sides of the top surface of the first water stop rubber. Magnetic powder magnetically connected to the panel unit is evenly arranged on the bottom surface of the first water stop rubber. Multiple annular anti-slip grooves are provided on the side surface of the second water stop rubber. The reverse stop grooves are provided on both sides of the top surface of the second water stop rubber and arranged along the extension direction of the splicing seam. The first deformation cavity is a circular through hole longitudinally extending along the splicing seam.

[0013] The second water stop structure includes a mounting seat connected to the bottom support. A third water stop rubber connected to the bottom surface of the channel is provided in the mounting seat. An annular corrugated groove is provided on the sealing surface between the third water stop rubber and the mounting seat. The cross-section of the part of the third water stop rubber below the mounting seat is a triangular structure. A second deformation cavity and a third deformation cavity are provided inside the third water stop rubber.

[0014] The quick-repair expandable cofferdam without water interruption for channels provided by the utility model is a modular assembly structure, which is convenient for transportation. The corresponding number of modules can be selected according to the channel slope ratio, the applied water depth and the size of the repair area for quick assembly and positioning. Secondly, the assembled cofferdam can make the supporting bottom surface in close contact with the channel lining through the load balancing mechanism, and balance the pressure of the cofferdam on the channel lining. At the same time, it avoids the local pressure of the cofferdam support exceeding the bearing capacity of the channel foundation, ensuring the safety of underwater buildings. Through the unloading cabin in the load balancing mechanism, an upward buoyancy is generated during the installation and sliding of the cofferdam, greatly reducing the capacity of the traction equipment required for the installation of the cofferdam, so that the large-area repair cofferdam can be applied. Thirdly, the performance of the water-stop structure between the panel of the cofferdam assembly block and between the cofferdam and the channel lining is improved, providing a safe and stable dry construction environment for the repair of the channel without water interruption, and solving the problem of non-stop water repair after large-area damage to the channel slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the structural schematic diagram of the utility model.

[0016] Figure 2 is Figure 1 the structural schematic diagram after being positioned on the channel slope.

[0017] Figure 3 is Figure 2 the right view of

[0018] Figure 4 is Figure 3 the sectional view of

[0019] Figure 5a is Figure 4 the A-A sectional view of

[0020] Figure 5b is Figure 4 the enlarged view of part B of

[0021] Figure 5c is Figure 4 the enlarged view of part C of

[0022] Figure 6a , Figure 6b , Figure 6c is the schematic diagram of the cofferdam assembly for selecting different-angle adapter sections according to the channel slope.

[0023] Figure 7a is the schematic diagram of the force on the enclosure structure of the cofferdam described in this application.

[0024] Figure 7b is the schematic diagram of the force on the enclosure structure of the existing cofferdam.

[0025] Figure 8a , Figure 8b ,Figure 8c It is a schematic diagram of the cofferdam formed by different assembling units of the present utility model.

[0026] Figure 9a It is a schematic diagram of the load-sharing and balancing mechanism in the present utility model.

[0027] Figure 9b It is Figure 9a an enlarged view of part D in

[0028] Figure 10a It is Figure 5a an enlarged view of part E in

[0029] Figure 10b It is Figure 10a a schematic diagram of the structure of the second water-stop rubber in

[0030] Figure 10c It is Figure 5a an exploded enlarged view of part F in Specific implementation manners

[0031] The following will describe in detail the embodiments of the present utility model 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 manners and specific construction processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0032] As Figures 1 - 10c shown, the quick-repair expandable cofferdam without flow interruption for the channel described in the present utility model includes an angle-adaptation section 1. The water-facing side of the angle-adaptation section 1 is a near-horizontal plane 1a connected to the bottom enclosure 2 of the channel, and the shore-facing side of the angle-adaptation section 1 is a near-shore plane 1b connected to the slope enclosure 3. The above-mentioned bottom enclosure 2 is arranged on the bottom plane of the channel. The water-facing surface and the back water surface of the bottom enclosure 2 are both arc-shaped (to reduce water resistance), the bottom water-passing surface 2c of the bottom enclosure 2 is vertically arranged (to reduce the horizontal thrust of water pressure), and the connecting surface of the bottom enclosure 2 connected to the near-horizontal plane 1a of the angle-adaptation section 1 is inclined; the slope enclosure 3 is arranged along the slope. The water-facing surface and the back water surface of the slope enclosure 3 are both arc-shaped, and the connecting surface of the slope enclosure 3 connected to the near-shore plane 1b of the angle-adaptation section 1 is perpendicular to the slope.

[0033] The above-mentioned angle-adaptation section 1 is arranged in sections along the water flow direction, and the included angle between the near-horizontal plane 1a and the near-shore plane 1b is determined according to the slope inclination angle (see Figure 6a , Figure 6b , Figure 6c ). That is, the angle-adaptation section 1 is selected according to the specific angle of the slope inclination angle, and the installation angle of the slope enclosure 3 is adjusted through the angle-adaptation section 1, so that the top surface of the slope enclosure 3 can be parallel to the channel slope, thus facilitating maintenance personnel to enter the interior of the cofferdam and ensuring sufficient maintenance operation space.

[0034] The above-mentioned bottom enclosure 2 of the canal is formed by splicing the water-facing bottom foundation unit 21 and the back-water bottom foundation unit 22, or by splicing the water-facing bottom foundation unit 21, the back-water bottom foundation unit 22, and at least one group (3 pieces) of bottom expansion units 23 located between the two. Among them, whether to use the bottom expansion unit 23 and how many bottom expansion units 23 are used along the water flow direction are determined according to the area of the canal slope repair, so that the finally assembled cofferdam can cover all the parts to be repaired. Among them, the bottoms of the water-facing bottom foundation unit 21, the back-water bottom foundation unit 22, and the bottom expansion unit 23 are all water-passing surfaces 2c vertically arranged (see Figure 7a ), compared with the existing bottom surface of the cofferdam perpendicular to the canal slope (see Figure 7b ), the utility model improves the overall force distribution. Specifically, it reduces the transverse thrust of the water pressure along the slope direction, and at the same time increases the positive pressure perpendicular to the top surface, correspondingly increasing the frictional force, and greatly improving the slope stability of the cofferdam.

[0035] The above-mentioned slope enclosure 3 is formed by splicing the water-facing slope foundation unit 31, the back-water slope foundation unit 32, and the entrance unit 33, or by splicing the water-facing slope foundation unit 31, the back-water slope foundation unit 32, at least one slope expansion unit 34 located between the two, and the entrance unit 33. Generally, the splicing length of the water-facing slope foundation unit 31 and the water-facing bottom foundation unit 21 in the water flow direction is the same, the splicing length of the back-water slope foundation unit 32 and the back-water bottom foundation unit 22 in the water flow direction is the same, and each slope expansion unit 34 corresponds to three bottom expansion units 23. The water-facing slope foundation unit 31, the back-water slope foundation unit 32, and the slope expansion unit 34 are first spliced into groups according to the water flow direction length of the bottom enclosure 2, and then spliced successively from bottom to top along the canal slope. After that, the entrance unit 33 is installed on the topmost water-facing slope foundation unit 31 and back-water slope foundation unit 32. The number of slope enclosure units is determined according to the water depth of the canal, so that there is a safety superheight of 0.3 - 0.5 m between the back-water side of the slope enclosure and the water surface line, as shown in Figure 3 . Figure 8a The shown cofferdam is only composed of the foundation units on the water-facing side and the back-water side and the entrance unit, without involving expansion units; Figure 8b The shown cofferdam, on the basis of the cofferdam shown in Figure 8a , adds three bottom expansion units 23 and a row of slope expansion units 34; Figure 8c The shown cofferdam, on the basis of the cofferdam shown in Figure 8a , uses six bottom expansion units 23 and two rows of slope expansion units 34.

[0036] The above-mentioned upstream bottom foundation unit 21, downstream bottom foundation unit 22, bottom extension unit 23, upstream slope foundation unit 31, downstream slope foundation unit 32, slope extension unit 34 and inlet unit 33 (collectively referred to as splicing units) are all composed of a panel assembly 4 and a bottom support 5. Among them, the panel assembly 4 includes main beams arranged along the water flow direction and secondary beams arranged perpendicular to the water flow direction. End plates 41 are provided at both ends of the main beams and secondary beams. The end plates 41 and above the beams are welded with a panel 42; the angle adaptor section 1 also adopts the above beam and plate structure. In the present utility model, the connection between the angle adaptor section 1 and the splicing units, as well as the connection between the splicing units, are all realized through the connection of adjacent end plates 41. At the same time, a first water stop structure is arranged in the panel splicing joint above the end plate 41 to achieve the water seal on the surface of the cofferdam.

[0037] The above-mentioned connection of the end plates 41 includes two methods: rigid connection and flexible connection. Specifically, as Figure 5b shown, between adjacent end plates 41 arranged along the water flow direction, a plurality of bolts 43 are used to rigidly connect the pair of panel assemblies 4; as Figure 5c shown, between adjacent end plates 41 arranged perpendicular to the water flow direction, the flexible connection of the pair of panel assemblies is achieved by the way of hinging a pin shaft 44 with a double-ear plate 45, so as to increase the adaptability of the splicing unit to the uneven slope lining in the damaged area.

[0038] The bottom support 5 of the above-mentioned upstream bottom foundation unit 21, downstream bottom foundation unit 22, bottom extension unit 23 and inlet unit 33 is a fixed structure connected to the panel assembly 4 (see Figure 4), with a frame structure above and a load - equalizing balance mechanism 6 in contact with the channel surface below, and a second water - stop structure is provided on the periphery. Two bottom supports 5 are provided below the panel assembly 4 of each upstream slope foundation unit 31, downstream slope foundation unit 32, and slope extension unit 34. Among them, the bottom support 5 on the side close to the arc - shaped panel in the upstream slope foundation unit 31 and the downstream slope foundation unit 32 is a fixed - type structure connected to the panel assembly 4, and the bottom surface is the load - equalizing balance mechanism 6 in contact with the channel surface. The second water - stop structure is provided on the inner edge and outer edge of the above - mentioned bottom support 5 respectively; the bottom support 5 on the other side of the upstream slope foundation unit 31 and the downstream slope foundation unit 32 is a movable - type structure, including one or more hydraulic cylinder - column assemblies 51 connected to the panel assembly 4, and a load - equalizing balance mechanism 6 in contact with the channel is provided below the hydraulic cylinder - column assembly 51. To improve the structural stability, two diagonal tie rods 52 are provided between each hydraulic cylinder - column assembly 51 and the panel assembly 4, and the above - mentioned diagonal tie rods 52 are arranged in the plane where the water flow direction is located; at the same time, a connecting rod 53 perpendicular to the water flow direction is provided between adjacent hydraulic cylinder - column assemblies 51, and a longitudinal shear - resistant device 54 is provided between the connecting rod 53 and the panel assembly 4. The setting of the above - mentioned movable bottom support 5 strengthens the support between the cofferdam panel and the channel slope, improves the overall structural stability of the large - area assembled cofferdam, and, without affecting the overall structure, one or more movable bottom supports 5 can be displaced to meet the requirements of channel slope repair.

[0039] As Figure 9a , Figure 9b shown, the above - mentioned load - equalizing balance mechanism 6 includes a load - reducing bin 61 with a cavity structure and a load - equalizing bin 62 located below it. The load - equalizing cavity of the above - mentioned load - equalizing bin 62 is enclosed by the bottom plate 621 of the load - reducing bin 61, a flexible load - equalizing plate 622 in contact with the channel lining, and a mounting seat connecting the two. Specifically, the bottom plate 621 of the load - reducing bin 61 is made of flat steel plate, the flexible load - equalizing plate 622 is made of pressure - resistant composite rubber plate for rubber dam, and the mounting seat is composed of a steel seat body 623, a pressing plate 624, and bolts 625 connecting the two. The cross - section of the above - mentioned seat body 623 is an L - shaped structure (see Figure 9b), which includes a vertical plate welded to the periphery of the bottom plate 621 of the load-reducing chamber and arranged circumferentially. The bottom of the vertical plate has an integrally formed horizontal support plate extending inward, and a sealing protrusion 626 is provided on the bottom surface of the support plate; the pressing plate 624 is a closed annular plate with the same shape as the support plate, and a sealing groove 627 adapted to the protrusion 626 is provided thereon. Corresponding bolt holes are provided at intervals on the above-mentioned support plate and the pressing plate 624, and the nuts are welded to the upper edge of the inner side of the L-shaped structure after drilling. When installing the flexible load-sharing plate 622, place the flexible load-sharing plate 622 on the support plate of the seat body 623, then press the pressing plate 624 against the edge of the flexible load-sharing plate 622, and make the protrusion 626 and the groove 627 correspond to each other. Finally, fasten the support plate, the flexible load-sharing plate 622 and the pressing plate 624 together with bolts 625. The protrusion 626 and the groove 627 press and engage the load-sharing plate 622 to achieve the water tightness of the load-sharing chamber. A water pipe 631 with its bottom communicating with the load-sharing chamber is provided in the above-mentioned load-reducing chamber 61. Two branch pipes passing through the side wall of the load-reducing chamber 61 and extending outward are provided at the top of the water pipe 631. One branch pipe is connected to a water filling valve 632, and the other branch pipe is connected to a pressure regulating valve 633.

[0040] The above-mentioned pressure regulating valve 633 is used to adjust the pressure value of the load-sharing chamber 62. It calculates the pressure value at the bottom of each splicing unit after the inside of the cofferdam is evacuated according to the working conditions of the cofferdam application and makes a preset before assembly. Usually, during the process of installing the cofferdam at the bottom of the channel underwater, the center of buoyancy and the center of gravity of each splicing unit of the cofferdam 2 at the bottom of the channel are made to coincide and have the same height, and its buoyancy is 1.1 - 1.2 times that of the gravity, so that the cofferdam at the bottom of the channel can be installed floating in the channel. Then, install the angle adapter section 1, and finally install the slope cofferdam 3 on the slope. The setting of the load-reducing chamber 61 enables the floating installation of the cofferdam at the bottom of the channel, avoiding the problem of bottom leveling faced during slope installation; at the same time, the buoyancy of each splicing unit of the slope cofferdam 3 is 0.7 - 0.8 times that of the gravity, so as to reduce the total capacity of the cofferdam sliding traction system. After the cofferdam is in place, pump water out of the inside of the cofferdam, and pressurize the load-sharing chamber 62 through the water filling valve 632 of each load-sharing balance mechanism as the water level inside the cofferdam drops. When the bottom supports 5 of each cofferdam are in contact with the damaged part of the channel lining, since the medium in the load-sharing chamber 62 is water and the load-sharing chamber 62 is in contact with the channel lining through the flexible load-sharing plate 622, the upper load can be evenly transmitted to the channel slope, avoiding secondary damage to the channel lining caused by excessive local load.

[0041] Such as Figure 10a 、 Figure 10bAs shown in the figure, the above-mentioned first water-stop structure includes a water-stop seat 71, a first water-stop rubber 72 and a second water-stop rubber 73. Usually, the water-stop seat 71 is made of square steel profiles that are easy to process. It is installed in the splicing joints of the panels 41 of adjacent splicing units and welded to the end plates 41 on both sides respectively. After the end plates 41 are assembled, a water-stop groove with a square structure is formed at the joint. The first water-stop rubber 72 is installed above the water-stop groove and is a flat rubber laid on the top of adjacent panels 41. During its manufacturing, magnetic powder is evenly filled on its lower surface, so that it can be magnetically fixed to the top surface of the panel 41. Further, anti-warping arc edges are provided on both sides of the top surface of the first water-stop rubber 72. After the cofferdam enters the water, under the action of water pressure, the first water-stop rubber 72 closely adheres to the panel 41 of the splicing unit, thus forming a seal. In order to prevent the first water-stop rubber 72 from failing, a second water-stop rubber 73 is also installed between the water-stop seat 71 and the first water-stop rubber 72. A deformation cavity 74 is provided in the middle of the second water-stop rubber 73, which is a circular through-hole extending longitudinally along the splicing joint in this embodiment. The top surface of the second water-stop rubber 73 (see Figure 10b ) is a flat structure provided with a check valve groove 75, which is in contact with the bottom surface of the first water-stop rubber 72; the bottom surface is an arc structure and is in contact with the water-stop seat 71. Both sides of the second water-stop rubber 73 are hermetically connected to the two end plates 41 respectively. In order to prevent falling off, multiple anti-slip grooves 76 are provided on the side surface of the second water-stop rubber 73. The above-mentioned check valve groove 75 is provided with one on each side of the top surface of the second water-stop rubber 73, and both are V-shaped grooves extending along the direction of the splicing joint. When the first water-stop rubber 72 fails to prevent water leakage, the top surface is deformed under pressure, and the rubber outside the check valve groove 75 is extruded towards the end plates 41 on both sides, improving the connection tightness between the two, thus improving the water-stop effect.

[0042] As Figure 10c shown in the figure, the above-mentioned second water-stop structure uses an inverted channel steel welded to the fixed bottom support 5 as the mounting seat 81, and a third water-stop rubber 82 with its bottom connected to the bottom surface of the channel is installed inside it. A chamfer is provided at the top of the above-mentioned third water-stop rubber 82, and a corrugated groove 83 is provided on the side surface. After it is pressed into the mounting seat 81, it can closely fit and will not fall off. The cross-section of the third water-stop rubber 82 below the corrugated groove 83 is a triangular structure and is located outside the mounting seat 81. A second deformation cavity 84 is provided in this part, so that the third water-stop rubber 82 has a certain pre-compression amount after being placed on the channel, thus forming a good seal with the bottom surface of the channel. Further, a third deformation cavity 85 is also provided above the second deformation cavity 84.

[0043] When splicing the above-mentioned first water-stop rubber 72, second water-stop rubber 73 and third water-stop rubber 82, the Z-shaped offset lap joint and cold bonding method are all adopted.

[0044] Since the cofferdam needs to slide down along the canal slope during the assembly process, lifting mobile wheels 9 are provided on both sides of the foundation units 31 of the water-facing slope and the foundation units 32 of the backwater-facing slope, outside the panel of the inlet unit 33, and at the bottom of the movable bottom support 5. The above-mentioned mobile wheels 9 are connected to the hydraulic system, and the vertical lifting of the mobile wheels 9 is controlled by the hydraulic system. When the cofferdam is in the states of assembly sliding down and rising for demolition, the mobile wheels 9 are in the supporting state of contacting the canal slope; after the cofferdam is in place, the mobile wheels 9 are in the retracted state, and their lower edges are separated from the canal slope.

[0045] When the utility model is installed, multiple sets of winches placed at different positions on the canal berm are used to form the cofferdam sliding slope traction equipment and the azimuth adjustment traction equipment, which solves the installation problem of the large-area non-stop water cofferdam under the condition of a narrow canal berm. The above-mentioned cofferdam system is of modular structure, and the corresponding number of modules can be selected for rapid assembly according to the canal slope ratio, application water depth and the size of the repair area, providing a safe and stable dry construction environment for the repair of the canal without water interruption.

[0046] It should be noted that in the description of the present utility model, terms indicating the azimuth or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and therefore should not be construed as a limitation to the present utility model.

Claims

1. An expandable cofferdam for rapid repair without interruption of channels, characterized in that: It includes a bottom enclosure, a slope enclosure, and an angle adaptor section that are set in segmented sections; the angle adaptor section is arranged along the water flow direction, the near-water side of the angle adaptor section is a near-horizontal plane connected to the bottom enclosure, and the near-shore side of the angle adaptor section is a near-shore plane connected to the slope enclosure; the bottom enclosure is arranged on the bottom plane of the channel, the water-facing surface and the back water-facing surface of the bottom enclosure are both arranged in an arc shape, the water-passing surface at the bottom of the bottom enclosure is arranged vertically, and the connecting surface where the bottom enclosure is connected to the near-horizontal plane is arranged obliquely; the slope enclosure is arranged along the slope, the water-facing surface and the back water-facing surface of the slope enclosure are both arranged in an arc shape, and the connecting surface where the slope enclosure is connected to the near-shore plane is perpendicular to the slope; a first water-stop structure is arranged between adjacent bottom enclosures, between adjacent slope enclosures, between adjacent angle adaptor sections, as well as between the bottom enclosure and the angle adaptor section, and between the slope enclosure and the angle adaptor section. A second water-stop structure is arranged between the contact surfaces of the bottom enclosure, the slope enclosure, and the angle adaptor section with the bottom / slope.

2. The channel non-cutoff rapid repair expandable cofferdam according to claim 1, characterized in that: The bottom enclosure is spliced by a water-facing bottom foundation unit and a back water-facing bottom foundation unit, or is spliced by the water-facing bottom foundation unit, the back water-facing bottom foundation unit, and at least one group of bottom extension units located therebetween.

3. The channel non-interrupted flow rapid repair expandable cofferdam according to claim 2, characterized in that: The slope enclosure is spliced by a water-facing slope foundation unit, a back water-facing slope foundation unit, and an entrance unit, or is spliced by the water-facing slope foundation unit, the back water-facing slope foundation unit, at least one slope extension unit located therebetween, and the entrance unit.

4. The channel non-cutoff rapid repair expandable cofferdam according to claim 3, characterized in that: The water-facing bottom foundation unit, the back water-facing bottom foundation unit, the bottom extension unit, the water-facing slope foundation unit, the back water-facing slope foundation unit, the slope extension unit, and the entrance unit are all composed of a panel unit and a bottom support, and lifting mobile wheels are arranged on both sides of the water-facing slope foundation unit and the back water-facing slope foundation unit, outside the panel of the entrance unit, and at the bottom of the bottom support of the slope extension unit.

5. The channel non-cutoff rapid repair expandable cofferdam according to claim 4, characterized in that: The bottom supports of the water-facing bottom foundation unit, the back water-facing bottom foundation unit, the bottom extension unit, and the entrance unit are all fixed structures; the bottom support of the slope extension unit is a movable structure, and each slope extension unit includes two bottom supports arranged at intervals along the water flow direction; each water-facing slope foundation unit and back water-facing slope foundation unit is provided with two bottom supports, one of which is a fixed structure and the other is a movable structure.

6. The expandable cofferdam for rapid repair without interruption of flow in the channel according to claim 4, characterized in that: A load-sharing and balancing mechanism is arranged at the bottom of the bottom support. The load-sharing and balancing mechanism includes a load-reducing bin with a cavity structure. A load-sharing bin is arranged below the load-reducing bin. The load-sharing cavity of the load-sharing bin is enclosed by the bottom plate of the load-reducing 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-reducing bin. Two branch pipes passing through the side wall of the load-reducing bin and extending outward 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.

7. The expandable cofferdam for rapid repair without interruption of flow in the channel according to claim 6, characterized in that: The bottom plate of the load reduction bin is a flat steel plate, the flexible load equalizing 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, and 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 load equalizing plate is arranged between the support plate and the pressing plate and connected by the bolts.

8. The expandable cofferdam for rapid repair without interruption of flow in a channel according to claim 4, characterized in that: The first water stop structure includes a water stop seat, a first water stop rubber and a second water stop rubber. The water stop seat is arranged in the splicing joint of adjacent panel units. The first water stop rubber is arranged on the top of the panel unit and covers the splicing joint. The second water stop rubber is arranged between the water stop seat and the first water stop rubber. The top surface of the second water stop rubber is a flat structure provided with a backflow prevention groove, the bottom surface of the second water stop rubber is an arc structure connected to the water stop seat, the two sides of the second water stop rubber are hermetically connected to the panel unit, and a first deformation cavity is arranged in the middle of the second water stop rubber.

9. The expandable cofferdam with quick repair without interruption of flow in the channel according to claim 8, wherein: Anti-warping arc edges are arranged on both sides of the top surface of the first water stop rubber, and magnetic powder magnetically connected to the panel unit is evenly arranged on the bottom surface of the first water stop rubber; multiple anti-slip grooves are arranged on the side surface of the second water stop rubber; the backflow prevention groove is arranged on both sides of the top surface of the second water stop rubber and extends along the extension direction of the splicing joint; the first deformation cavity is a circular through hole longitudinally extending along the splicing joint.

10. The expandable cofferdam for rapid repair without interruption of flow in a channel according to claim 4, characterized in that: The second water stop structure includes a mounting seat connected to the bottom support. A third water stop rubber connected to the bottom surface of the channel is arranged in the mounting seat. Corrugated grooves are arranged on the sealing surface of the third water stop rubber and the mounting seat. The cross-section of the part of the third water stop rubber below the mounting seat is a triangular structure, and a second deformation cavity and a third deformation cavity are arranged inside the third water stop rubber.

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