A canal slope repair cofferdam device and its usage method

Abstract

A canal slope repair cofferdam device includes two transverse cofferdams, a first longitudinal cofferdam, and a second longitudinal cofferdam. The transverse cofferdams, the first longitudinal cofferdam, and the second longitudinal cofferdam all adopt a frame structure. The two transverse cofferdams are arranged in parallel on the upper side of the canal bottom and the two canal slope lining plates. The first longitudinal cofferdam and the second longitudinal cofferdam are respectively connected between the two transverse cofferdams. A first water bag and a second water bag are arranged on the upper side of the two canal slope lining plates. The first water bag, the two transverse cofferdams, and the first longitudinal cofferdam enclose a construction dry area. The second water bag, the two transverse cofferdams, and the second longitudinal cofferdam enclose a flow-through area. Baffles are connected to the outer sides of the transverse cofferdams and the first longitudinal cofferdam. A sealed bottom plate is arranged in the flow-through area. The lower side of the sealed bottom plate is connected to the second water bag, and the upper side of the sealed bottom plate is connected to the lower sides of the two transverse cofferdams and the second longitudinal cofferdam. This design is not only applicable to large-area repairs, but also has a stable structure and high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of channel slope repair, and in particular to a cofferdam device for channel slope repair and a using method thereof. Background Art

[0002] The Middle Route Project of the South-to-North Water Diversion Project is responsible for the tasks of supplying water to urban residents and industrial production in large and medium-sized cities. Affected by complex geological conditions, high groundwater, floods, frost heaving and other factors, the lining plates on the channel slopes are prone to various degrees of cracking, bulging, collapse and other damage phenomena, which affect the water supply efficiency and water supply safety. Therefore, it is urgent to complete the maintenance and repair construction of the channel slope lining plates efficiently and with high quality. At present, the existing maintenance and repair construction related to the lining plates is generally carried out under the water conveyance state.

[0003] At present, the technical solutions of the cofferdam devices for ensuring the maintenance and repair construction of the lining plates under the water conveyance state mainly include two categories: semi-enclosed type and slope-attached type. The semi-enclosed cofferdam is provided with a longitudinal cofferdam along the water flow direction, and transverse cofferdams are respectively arranged at the upstream and downstream. A U-shaped layout is formed by enclosing between the longitudinal cofferdam and the transverse cofferdams, and a construction dry area is formed by enclosing one side of the channel; as the name implies, the slope-attached cofferdam means that the device structure is closely attached to the slope surface of the channel slope. A sealed structure is arranged between the bottom of the device structure and the slope surface, and the top bears the water pressure, forming a sealed outer cover with a limited air height with the slope surface, so as to construct a semi-closed construction dry area.

[0004] However, both of the above two solutions have deficiencies. The semi-enclosed cofferdam solution uses struts, tie rods and other methods to balance the lateral force generated by the water pressure on the cofferdam. This solution has the operation safety risks of support instability and cofferdam overturning in the dynamic water operation. At the same time, the lateral force in this solution increases linearly with the expansion of the operation width, which further limits the effective operation width along the water flow direction and cannot meet the large-area repair requirements; the slope-attached cofferdam is suitable for small-scale and rapid maintenance and repair work. Due to its structure being a semi-closed structure, there are major safety hazards. Once an accident occurs, it is very likely to cause major safety accidents similar to the water inlet of an underwater submersible. At the same time, the water pressure on the top of this cofferdam is mainly resisted by the lining plate bearing pressure. The bearing capacity of the lining plate is limited, which determines that this cofferdam cannot be applicable to large-area repair requirements in terms of its structural form. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects and problems in the prior art that the cofferdam device cannot be applicable to large-area repair, and to provide a cofferdam device for channel slope repair that can be applicable to large-area repair and a using method thereof.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A canal slope repair cofferdam device includes two transverse cofferdams, a first longitudinal cofferdam, and a second longitudinal cofferdam. The transverse cofferdams, the first longitudinal cofferdam, and the second longitudinal cofferdam all adopt a frame structure. The two transverse cofferdams are symmetrically arranged along the direction perpendicular to the water flow on the upper sides of the canal bottom and two canal slope lining plates. The first longitudinal cofferdam and the second longitudinal cofferdam are respectively connected between the two transverse cofferdams along the water flow direction. A first water bag and a second water bag are respectively arranged on the upper sides of the two canal slope lining plates. The first water bag, the two transverse cofferdams, and the first longitudinal cofferdam enclose a construction dry area. The second water bag, the two transverse cofferdams, and the second longitudinal cofferdam enclose a flow-through area. Baffles are connected to the upper sides, lower sides, and outer sides of the two transverse cofferdams and the first longitudinal cofferdam located in the construction dry area. A sealed bottom plate is arranged in the flow-through area. The lower side of the sealed bottom plate is connected to the second water bag, and the upper side of the sealed bottom plate is connected to the lower sides of the two transverse cofferdams and the second longitudinal cofferdam.

[0008] The transverse cofferdam includes a first truss, a second truss, and multiple third trusses. The first truss is in the shape of a right triangle. The hypotenuse of the first truss is arranged relative to the upper side of one of the canal slope lining plates. The vertical side of the first truss is connected to the left side of the first longitudinal cofferdam. One side of the second truss is connected to the right side of the first longitudinal cofferdam, and the other side of the second truss is connected to the left side of the second longitudinal cofferdam. The third truss is in the shape of a right triangle, and multiple third trusses are connected to the upper side of the sealed bottom plate in a stepped manner. The lowermost third truss is connected to the right side of the second longitudinal cofferdam.

[0009] A fixed support is arranged on the upper side of the sealed bottom plate, and the outer side surface of the fixed support is connected to the inner side surfaces of the third truss and the second longitudinal cofferdam.

[0010] Multiple third water bags are evenly distributed on the lower side of the sealed bottom plate. The lower sides of the third water bags abut against the upper sides of the canal slope lining plates. The second water bag is in a U shape and is located outside the multiple third water bags.

[0011] The first water bag is in a U shape. The two side parts of the first water bag are respectively connected to the baffles on the lower sides of the two transverse cofferdams. The bottom of the first water bag is connected to the baffle on the lower side of the first longitudinal cofferdam. Clamping plates are arranged on the inner and outer sides of the first water bag. The clamping plates are in a U shape. The two side parts of the clamping plates are respectively connected to the baffles on the lower sides of the two transverse cofferdams. The bottom of the clamping plates is connected to the baffle on the lower side of the first longitudinal cofferdam.

[0012] The canal slope repair cofferdam device is also provided with multiple tie rods. One ends of the multiple tie rods are connected to the upper side of the sealed bottom plate, and the other ends of the multiple tie rods pass through the second longitudinal cofferdam and are then connected to the baffle on the outer side of the first longitudinal cofferdam.

[0013] The canal slope repair cofferdam device is also provided with a cable. A plurality of pulley assemblies are respectively arranged on the upper side of the sealing bottom plate and the outer side of the first longitudinal cofferdam. One end of the cable is connected to the upper side of the sealing bottom plate, and the other end of the cable sequentially bypasses the pulley assemblies on the sealing bottom plate and the pulley assemblies on the first longitudinal cofferdam and then is connected to the upper side of the sealing bottom plate.

[0014] The pulley assembly includes a base, a rotating shaft and a pulley. The base is connected to the upper side of the sealing bottom plate. The rotating shaft is vertically connected to the base. The pulley is horizontally sleeved on the rotating shaft. The pulley is rotatably connected to the base through the rotating shaft. A connecting groove matching the outer shape of the cable is formed on the outer peripheral surface of the pulley, and a plurality of through holes are formed on the upper end surface of the pulley.

[0015] A plurality of buoyancy balls are sleeved on the outer peripheral surface of the cable.

[0016] A using method of a canal slope repair cofferdam device, the using method comprising the following steps:

[0017] Step 1: Symmetrically place two first trusses on the upper side of one of the canal slope lining plates along the direction perpendicular to the water flow. Install a first longitudinal cofferdam between the two first trusses, so that the first longitudinal cofferdam and the two first trusses enclose a construction dry area arranged in a U shape. At the same time, install baffles at the joints, bottom, upper side and outer side of the first longitudinal cofferdam and the two first trusses, and then install first water bags at the bottom of the first longitudinal cofferdam and the two first trusses, so that the construction dry area is in a sealed state;

[0018] Step 2: Install a sealing bottom plate on the upper side of the other canal slope lining plate. At the same time, place a second water bag on the lower side of the sealing bottom plate. Install a second longitudinal cofferdam on the upper side of the sealing bottom plate close to the canal bottom. Then symmetrically install the remaining third trusses between the sealing bottom plate and the second longitudinal cofferdam along the direction perpendicular to the water flow, and then symmetrically distribute the remaining third trusses in a stepped manner on the upper side of the sealing bottom plate. The third trusses on the same side are connected to each other to form a flow-through area;

[0019] Step 3: Install a second truss on the upper side of the canal bottom and connect the first longitudinal cofferdam and the second longitudinal cofferdam;

[0020] Step 4: Inject water into the first water bag and the second water bag, and realize pressure balance by adjusting the pressure of the first water bag and the second water bag.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In a canal slope repair cofferdam device and its usage method of the present invention, a semi-enclosed structural design is adopted. A first longitudinal cofferdam and a second longitudinal cofferdam are arranged along the water flow direction, and two transverse cofferdams are respectively arranged at the upstream and downstream. A construction dry area with a U-shaped layout is formed by enclosing between the first longitudinal cofferdam and the transverse cofferdam. A flow-through area is set on the opposite slope of the construction dry area. The inside of the construction dry area does not bear water pressure, and the outside bears the left lateral force from the water. The flow-through area is provided with a sealed bottom plate, and the sealed bottom plate bears the right lateral force from the water. The water pressure on the sealed bottom plate is the same as that on the first longitudinal cofferdam, which can achieve the self-balance of the lateral force inside the device. Therefore, the repair length of the cofferdam device can be extended along the water flow direction of the canal, and large-area repair of the canal lining board can be realized. Therefore, the structure of the present invention is simple and can be applied to large-area repair. <>

[0023] 2. In a canal slope repair cofferdam device and its usage method of the present invention, by adopting the method of connecting multiple trusses in sequence, the connection between each structure is relatively stable, and at the same time, it is convenient for construction and installation, and it is convenient to adjust the length and size of each structure, with wide applicability; by setting fixed brackets, the stability of the sealed bottom plate structure is increased; by setting multiple third water bags, the pressure distribution under the sealed bottom plate is relatively uniform, and the structure is more stable. Therefore, the present invention has wide applicability and stable structure.

[0024] 3. In a canal slope repair cofferdam device and its usage method of the present invention, by setting a pull rod or cable between the second longitudinal cofferdam and the sealed bottom plate, the lateral force balance between the two is achieved; by setting buoyancy balls, buoyancy can be provided to offset the gravity of the cable. Therefore, the present invention has high reliability and stable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view schematic diagram of the present invention.

[0026] Figure 2 is the top view schematic diagram of the present invention.

[0027] Figure 3 is the structural schematic diagram of the transverse cofferdam, the first longitudinal cofferdam, and the second longitudinal cofferdam in Embodiment 1 of the present invention.

[0028] Figure 4 is the structural schematic diagram of the first truss, the first water bag, and the first longitudinal cofferdam of the present invention.

[0029] Figure 5 is the structural schematic diagram of the first truss, the first longitudinal cofferdam, and the clamping plate of the present invention.

[0030] Figure 6 is the structural schematic diagram of the sealed bottom plate, the second water bag, and the third water bag of the present invention.

[0031] Figure 7 It is a schematic structural diagram of the first longitudinal cofferdam, the second truss, the third truss, the sealed bottom plate, and the second longitudinal cofferdam in Embodiment 2 of the present invention.

[0032] Figure 8 It is a schematic structural diagram of the pulley assembly.

[0033] In the figure: the canal bottom 1, the canal slope lining plate 2, the transverse cofferdam 3, the first truss 31, the second truss 32, the third truss 33, the first longitudinal cofferdam 4, the second longitudinal cofferdam 5, the tie rod 6, the cable 7, the pulley assembly 8, the base 81, the rotating shaft 82, the pulley 83, the connecting groove 84, the through hole 85, the buoyancy ball 9, the first water bag 10, the second water bag 11, the third water bag 12, the construction dry area 13, the flow-through area 14, the sealed bottom plate 15, the baffle 16, the fixed bracket 17, the clamping plate 18. Specific embodiments

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 8 , a canal slope repair cofferdam device, including two transverse cofferdams 3, a first longitudinal cofferdam 4, and a second longitudinal cofferdam 5. The transverse cofferdams 3, the first longitudinal cofferdam 4, and the second longitudinal cofferdam 5 all adopt a frame structure. The two transverse cofferdams 3 are symmetrically arranged on the upper sides of the canal bottom 1 and the two canal slope lining plates 2 along the direction perpendicular to the water flow. The first longitudinal cofferdam 4 and the second longitudinal cofferdam 5 are respectively connected between the two transverse cofferdams 3 along the water flow direction. The first water bag 10 and the second water bag 11 are respectively arranged on the upper sides of the two canal slope lining plates 2. The first water bag 10, the two transverse cofferdams 3, and the first longitudinal cofferdam 4 enclose a construction dry area 13. The second water bag 11, the two transverse cofferdams 3, and the second longitudinal cofferdam 5 enclose a flow-through area 14. Baffles 16 are connected to the upper sides, lower sides, and outer sides of the two transverse cofferdams 3 and the first longitudinal cofferdam 4 located in the construction dry area 13. A sealed bottom plate 15 is arranged in the flow-through area 14. The lower side of the sealed bottom plate 15 is connected to the second water bag 11, and the upper side of the sealed bottom plate 15 is connected to the lower sides of the two transverse cofferdams 3 and the second longitudinal cofferdam 5.

[0036] The transverse cofferdam 3 includes a first truss 31, a second truss 32 and a plurality of third trusses 33. The first truss 31 is in the shape of a right triangle, and the hypotenuse of the first truss 31 is arranged relative to the upper side of one of the canal slope lining plates 2. The vertical side of the first truss 31 is connected to the left side of the first longitudinal cofferdam 4. One side of the second truss 32 is connected to the right side of the first longitudinal cofferdam 4, and the other side of the second truss 32 is connected to the left side of the second longitudinal cofferdam 5. The third truss 33 is in the shape of a right triangle, and a plurality of the third trusses 33 are connected to the upper side of the sealed bottom plate 15 in a stepped manner. The lowermost third truss 33 is connected to the right side of the second longitudinal cofferdam 5.

[0037] A fixing bracket 17 is arranged on the upper side of the sealed bottom plate 15, and the outer side surface of the fixing bracket 17 is connected to the inner side surfaces of the third truss 33 and the second longitudinal cofferdam 5.

[0038] A plurality of third water bags 12 are evenly distributed on the lower side of the sealed bottom plate 15. The lower side of the third water bag 12 abuts against the upper side of the canal slope lining plate 2. The second water bag 11 is in a U shape and is located outside the plurality of third water bags 12.

[0039] The first water bag 10 is in a U shape. The two side parts of the first water bag 10 are respectively connected to the lower baffles 16 of the two transverse cofferdams 3. The bottom of the first water bag 10 is connected to the lower baffle 16 of the first longitudinal cofferdam 4. Clamping plates 18 are arranged on the inner and outer sides of the first water bag 10. The clamping plates 18 are in a U shape. The two side parts of the clamping plates 18 are respectively connected to the lower baffles 16 of the two transverse cofferdams 3. The bottom of the clamping plates 18 is connected to the lower baffle 16 of the first longitudinal cofferdam 4.

[0040] The canal slope repair cofferdam device is also provided with a plurality of tie rods 6. One ends of the plurality of tie rods 6 are connected to the upper side of the sealed bottom plate 15, and the other ends of the plurality of tie rods 6 pass through the second longitudinal cofferdam 5 and are then connected to the baffle 16 outside the first longitudinal cofferdam 4.

[0041] The canal slope repair cofferdam device is also provided with a cable 7. A plurality of pulley assemblies 8 are respectively arranged on the upper side of the sealed bottom plate 15 and outside the first longitudinal cofferdam 4. One end of the cable 7 is connected to the upper side of the sealed bottom plate 15, and the other end of the cable 7 sequentially and alternately bypasses the pulley assemblies 8 on the sealed bottom plate 15 and the pulley assemblies 8 on the first longitudinal cofferdam 4 and is then connected to the upper side of the sealed bottom plate 15.

[0042] The pulley assembly 8 includes a base 81, a rotating shaft 82, and a pulley 83. The base 81 is connected to the upper side of the sealing bottom plate 15. The rotating shaft 82 is vertically connected to the base 81. The pulley 83 is transversely sleeved on the rotating shaft 82. The pulley 83 is rotatably connected to the base 81 through the rotating shaft 82. A connection groove 84 matching the outer shape of the cable 7 is formed on the outer peripheral surface of the pulley 83, and a plurality of through holes 85 are formed on the upper end surface of the pulley 83.

[0043] A plurality of buoyancy balls 9 are sleeved on the outer peripheral surface of the cable 7.

[0044] A method for using a canal slope repair cofferdam device, the method comprising the following steps:

[0045] Step 1: Symmetrically place two first trusses 31 on the upper side of one of the canal slope lining plates 2 in a direction perpendicular to the water flow. Install a first longitudinal cofferdam 4 between the two first trusses 31, so that the first longitudinal cofferdam 4 and the two first trusses 31 enclose a construction dry area 13 arranged in a U shape. At the same time, install baffles 16 at the joints, bottom, upper side, and outer side of the first longitudinal cofferdam 4 and the two first trusses 31. Then, arrange first water bags 10 at the bottom of the first longitudinal cofferdam 4 and the two first trusses 31 to make the construction dry area 13 in a sealed state.

[0046] Step 2: Install a sealing bottom plate 15 on the upper side of the other canal slope lining plate 2. At the same time, place a second water bag 11 on the lower side of the sealing bottom plate 15. Install a second longitudinal cofferdam 5 on the upper side of the sealing bottom plate 15 close to the canal bottom 1. Then, symmetrically install the remaining third trusses 33 on the upper side of the sealing bottom plate 15 in a stepped manner. The third trusses 33 on the same side are connected to each other to form a flow-through area 14.

[0047] Step 3: Install a second truss 32 on the upper side of the canal bottom 1 to connect the first longitudinal cofferdam 4 and the second longitudinal cofferdam 5.

[0048] Step 4: Inject water into the first water bags 10 and the second water bags 11, and achieve pressure balance by adjusting the pressure of the first water bags 10 and the second water bags 11.

[0049] The principle of the present invention is described as follows:

[0050] The parameters of the repair cofferdam equipment in the present invention are as follows: the maximum working water depth is 8 meters, the minimum effective working width is 8 meters, the economic working width is 52 meters, the working width can be expanded along the water flow direction of the channel, the structure of the first longitudinal cofferdam 4 in the construction dry area 13 can be arranged perpendicular to the bottom of the channel or at a certain inclination angle, the sealing specific pressure can be adjusted by adjusting the pressure of the second water bag 11, and finally the top of the sealing bottom plate 15 bears the water pressure to provide lateral balance tension for the construction dry area 13. The buoyancy balls 9 can be made of rubber material.

[0051] Embodiment 1:

[0052] Refer to Figures 1 to 8 , a canal slope repair cofferdam device, including two transverse cofferdams 3, a first longitudinal cofferdam 4, and a second longitudinal cofferdam 5. The transverse cofferdams 3, the first longitudinal cofferdam 4, and the second longitudinal cofferdam 5 all adopt a frame structure. The two transverse cofferdams 3 are symmetrically arranged on the upper sides of the canal bottom 1 and two canal slope lining plates 2 along the direction perpendicular to the water flow. The first longitudinal cofferdam 4 and the second longitudinal cofferdam 5 are respectively connected between the two transverse cofferdams 3 along the water flow direction. The first water bag 10 and the second water bag 11 are respectively arranged on the upper sides of the two canal slope lining plates 2. The first water bag 10, the two transverse cofferdams 3, and the first longitudinal cofferdam 4 enclose a construction dry area 13. The second water bag 11, the two transverse cofferdams 3, and the second longitudinal cofferdam 5 enclose a flow-through area 14. Baffles 16 are connected to the upper sides, lower sides, and outer sides of the two transverse cofferdams 3 and the first longitudinal cofferdam 4 in the construction dry area 13. A sealing bottom plate 15 is arranged in the flow-through area 14. The lower side of the sealing bottom plate 15 is connected to the second water bag 11, and the upper side of the sealing bottom plate 15 is connected to the lower sides of the two transverse cofferdams 3 and the second longitudinal cofferdam 5.

[0053] The canal slope repair cofferdam device is further provided with a plurality of tie rods 6. One ends of the plurality of tie rods 6 are connected to the upper side of the sealing bottom plate 15, and the other ends of the plurality of tie rods 6 pass through the second longitudinal cofferdam 5 and are then connected to the baffle 16 on the outer side of the first longitudinal cofferdam 4.

[0054] A using method of a canal slope repair cofferdam device, the using method includes the following steps:

[0055] Step 1: Symmetrically place two first trusses 31 on the upper side of one of the canal slope lining plates 2 along the direction perpendicular to the water flow. Install the first longitudinal cofferdam 4 between the two first trusses 31, so that the first longitudinal cofferdam 4 and the two first trusses 31 enclose a U-shaped construction dry area 13. At the same time, install baffles 16 at the joints, bottom, upper side, and outer side of the first longitudinal cofferdam 4 and the two first trusses 31. Then, arrange the first water bag 10 at the bottom of the first longitudinal cofferdam 4 and the two first trusses 31 to make the construction dry area 13 in a sealed state;

[0056] Step 2: Install the sealing bottom plate 15 on the upper side of another canal slope lining plate 2. At the same time, place the second water bag 11 on the lower side of the sealing bottom plate 15. Install the second longitudinal cofferdam 5 on the upper side of the sealing bottom plate 15 close to the canal bottom 1. Then symmetrically install two third trusses 33 in the direction perpendicular to the water flow between the sealing bottom plate 15 and the second longitudinal cofferdam 5. Then symmetrically distribute the remaining third trusses 33 in a stepped manner on the upper side of the sealing bottom plate 15. The third trusses 33 on the same side are connected to each other to form a flow-through area 14;

[0057] Step 3: Install the second truss 32 on the upper side of the canal bottom 1 to connect the first longitudinal cofferdam 4 and the second longitudinal cofferdam 5;

[0058] Step 4: Inject water into the first water bag 10 and the second water bag 11, and achieve pressure balance by adjusting the pressures of the first water bag 10 and the second water bag 11.

[0059] Embodiment 2:

[0060] The basic content is the same as that of Embodiment 1, except that:

[0061] Refer to Figures 7 to 8 , the canal slope repair cofferdam device is further provided with a cable 7. A plurality of pulley assemblies 8 are respectively arranged on the upper side of the sealing bottom plate 15 and the outer side of the first longitudinal cofferdam 4. One end of the cable 7 is connected to the upper side of the sealing bottom plate 15, and the other end of the cable 7 sequentially bypasses the pulley assemblies 8 on the sealing bottom plate 15 and the pulley assemblies 8 on the first longitudinal cofferdam 4 and then is connected to the upper side of the sealing bottom plate 15. The pulley assembly 8 includes a base 81, a rotating shaft 82, and a pulley 83. The base 81 is connected to the upper side of the sealing bottom plate 15. The rotating shaft 82 is vertically connected to the base 81. The pulley 83 is horizontally sleeved on the rotating shaft 82. The pulley 83 is rotatably connected to the base 81 through the rotating shaft 82. A connection groove 84 matching the outer shape of the cable 7 is formed on the outer peripheral surface of the pulley 83, and a plurality of through holes 85 are formed on the upper end surface of the pulley 83. A plurality of buoyancy balls 9 are sleeved on the outer peripheral surface of the cable 7.

[0062] Embodiment 3:

[0063] The basic content is the same as that of Embodiment 1, except that:

[0064] Refer to Figures 1 to 4, the transverse cofferdam 3 includes a first truss 31, a second truss 32 and a plurality of third trusses 33. The first truss 31 is in the shape of a right triangle. The hypotenuse of the first truss 31 is arranged relative to the upper side of one of the canal slope lining plates 2. The vertical side of the first truss 31 is connected to the left side of the first longitudinal cofferdam 4. One side of the second truss 32 is connected to the right side of the first longitudinal cofferdam 4, and the other side of the second truss 32 is connected to the left side of the second longitudinal cofferdam 5. The third truss 33 is in the shape of a right triangle, and a plurality of the third trusses 33 are connected to the upper side of the sealed bottom plate 15 in a stepped manner. The lowermost third truss 33 is connected to the right side of the second longitudinal cofferdam 5. A fixing bracket 17 is provided on the upper side of the sealed bottom plate 15, and the outer side of the fixing bracket 17 is connected to the inner sides of the third truss 33 and the second longitudinal cofferdam 5.

[0065] Embodiment 4;

[0066] The basic content is the same as that of Embodiment 1, except that:

[0067] See Figure 5 and Figure 6 , a plurality of third water bags 12 are evenly distributed on the lower side of the sealed bottom plate 15. The lower side of the third water bag 12 abuts against the upper side of the canal slope lining plate 2. The second water bag 11 is U-shaped and is located outside the plurality of third water bags 12. The first water bag 10 is U-shaped. The two side parts of the first water bag 10 are respectively connected to the lower baffles 16 of the two transverse cofferdams 3. The bottom of the first water bag 10 is connected to the lower baffle 16 of the first longitudinal cofferdam 4. Clamping plates 18 are arranged on both the inner and outer sides of the first water bag 10. The clamping plates 18 are U-shaped. The two side parts of the clamping plates 18 are respectively connected to the lower baffles 16 of the two transverse cofferdams 3. The bottom of the clamping plates 18 is connected to the lower baffle 16 of the first longitudinal cofferdam 4.

Claims

1. A method for using a cofferdam device for repairing a canal slope, characterized in that: The described usage method is applied to a canal slope repair cofferdam device, which includes two transverse cofferdams (3), a first longitudinal cofferdam (4), and a second longitudinal cofferdam (5). The transverse cofferdams (3), the first longitudinal cofferdam (4), and the second longitudinal cofferdam (5) all adopt a frame structure. The two transverse cofferdams (3) are symmetrically arranged on the upper sides of the canal bottom (1) and two canal slope lining plates (2) in a direction perpendicular to the water flow. The first longitudinal cofferdam (4) and the second longitudinal cofferdam (5) are respectively connected between the two transverse cofferdams (3) along the water flow direction. A first water bag (10) and a second water bag (11) are respectively arranged on the upper sides of the two canal slope lining plates (2). The first water bag (10), the two transverse cofferdams (3), and the first longitudinal cofferdam (4) enclose a construction dry area (13). The second water bag (11), the two transverse cofferdams (3), and the second longitudinal cofferdam (5) enclose a flow-through area (14). Baffles (16) are connected to the upper sides, lower sides, and outer sides of the two transverse cofferdams (3) and the first longitudinal cofferdam (4) located in the construction dry area (13). A sealing bottom plate (15) is arranged in the flow-through area (14). The lower side of the sealing bottom plate (15) is connected to the second water bag (11), and the upper side of the sealing bottom plate (15) is connected to the lower sides of the two transverse cofferdams (3) and the second longitudinal cofferdam (5); The transverse cofferdam (3) includes a first truss (31), a second truss (32), and a plurality of third trusses (33). The first truss (31) is in the shape of a right triangle. The hypotenuse of the first truss (31) is arranged relative to the upper side of one of the canal slope lining plates (2). The vertical side of the first truss (31) is connected to the left side of the first longitudinal cofferdam (4). One side of the second truss (32) is connected to the right side of the first longitudinal cofferdam (4), and the other side of the second truss (32) is connected to the left side of the second longitudinal cofferdam (5). The third truss (33) is in the shape of a right triangle. A plurality of the third trusses (33) are connected to the upper side of the sealing bottom plate (15) in a stepped manner. The lowermost third truss (33) is connected to the right side of the second longitudinal cofferdam (5); The usage method includes the following steps: Step 1: Symmetrically place the two first trusses (31) on the upper side of one of the canal slope lining plates (2) in a direction perpendicular to the water flow. Install the first longitudinal cofferdam (4) between the two first trusses (31) so that the first longitudinal cofferdam (4) and the two first trusses (31) enclose a U-shaped construction dry area (13). At the same time, install baffles (16) at the joints, bottom, upper side, and outer sides of the first longitudinal cofferdam (4) and the two first trusses (31). Then, arrange a first water bag (10) at the bottom of the first longitudinal cofferdam (4) and the two first trusses (31) to make the construction dry area (13) in a sealed state; Step 2: Install the sealing bottom plate (15) on the upper side of another canal slope lining plate (2). At the same time, place the second water bag (11) on the lower side of the sealing bottom plate (15). Install the second longitudinal cofferdam (5) on the upper side of the sealing bottom plate (15) close to the canal bottom (1). Then, symmetrically install two third trusses (33) between the sealing bottom plate (15) and the second longitudinal cofferdam (5) along the direction perpendicular to the water flow. Next, symmetrically distribute the remaining third trusses (33) in a stepped manner on the upper side of the sealing bottom plate (15), and connect the third trusses (33) on the same side to form a flow-through area (14). Step 3: Install the second truss (32) on the upper side of the canal bottom (1) to connect the first longitudinal cofferdam (4) and the second longitudinal cofferdam (5). Step 4: Inject water into the first water bag (10) and the second water bag (11), and achieve pressure balance by adjusting the pressures of the first water bag (10) and the second water bag (11).

2. The usage method of a canal slope repair cofferdam device according to claim 1, characterized in that: A fixing bracket (17) is arranged on the upper side of the sealing bottom plate (15), and the outer side surface of the fixing bracket (17) is connected to the inner side surfaces of the third truss (33) and the second longitudinal cofferdam (5).

3. The usage method of a canal slope repair cofferdam device according to claim 1, characterized in that: A plurality of third water bags (12) are evenly distributed on the lower side of the sealing bottom plate (15), the lower sides of the third water bags (12) abut against the upper side of the canal slope lining plate (2), and the second water bag (11) is U-shaped and located outside the plurality of third water bags (12).

4. The usage method of a canal slope repair cofferdam device according to claim 1, characterized in that: The first water bag (10) is U-shaped. The two side parts of the first water bag (10) are respectively connected to the baffles (16) located on the lower sides of the two transverse cofferdams (3). The bottom of the first water bag (10) is connected to the baffle (16) located on the lower side of the first longitudinal cofferdam (4). Clamping plates (18) are arranged on both the inner and outer sides of the first water bag (10). The clamping plates (18) are U-shaped. The two side parts of the clamping plates (18) are respectively connected to the baffles (16) located on the lower sides of the two transverse cofferdams (3). The bottom of the clamping plates (18) is connected to the baffle (16) located on the lower side of the first longitudinal cofferdam (4).

5. The usage method of a canal slope repair cofferdam device according to claim 1, characterized in that: The canal slope repair cofferdam device is also provided with a plurality of tie rods (6). One ends of the plurality of tie rods (6) are connected to the upper side of the sealing bottom plate (15), and the other ends of the plurality of tie rods (6) pass through the second longitudinal cofferdam (5) and are then connected to the baffle (16) on the outer side of the first longitudinal cofferdam (4).

6. The usage method of a canal slope repair cofferdam device according to claim 1, characterized in that: The canal slope repair cofferdam device is also provided with a cable (7). A plurality of pulley assemblies (8) are respectively arranged on the upper side of the sealing bottom plate (15) and on the outer side of the first longitudinal cofferdam (4). One end of the cable (7) is connected to the upper side of the sealing bottom plate (15), and the other end of the cable (7) sequentially bypasses the pulley assemblies (8) on the sealing bottom plate (15) and the pulley assemblies (8) on the first longitudinal cofferdam (4) and is then connected to the upper side of the sealing bottom plate (15).

7. The usage method of a canal slope repair cofferdam device according to claim 6, characterized in that: The pulley assembly (8) includes a base (81), a rotating shaft (82), and a pulley (83). The base (81) is connected to the upper side of the sealing bottom plate (15). The rotating shaft (82) is vertically connected to the base (81). The pulley (83) is horizontally sleeved on the rotating shaft (82). The pulley (83) is rotatably connected to the base (81) through the rotating shaft (82). A connection groove (84) matching the outer shape of the cable (7) is formed on the outer peripheral surface of the pulley (83). A plurality of through holes (85) are formed on the upper end surface of the pulley (83).

8. The usage method of a canal slope repair cofferdam device according to claim 6, characterized in that: A plurality of buoyancy balls (9) are sleeved on the outer peripheral surface of the cable (7).

Images