Assembled cofferdam for multiple channel slopes

Abstract

The utility model discloses an assembled cofferdam for a multi-channel slope, which comprises a connecting joint, the near-water side of the connecting joint is a near-horizontal plane connected with a channel bottom enclosure, and the near-shore side of the connecting joint is a near-shore plane connected with a slope enclosure; the channel bottom enclosure is arranged on the channel bottom plane, the upstream face and the downstream face of the channel bottom enclosure are both arranged in an arc shape, the bottom water passing face of the channel bottom enclosure is vertically arranged, and the connecting face, connected with the near horizontal plane, of the channel bottom enclosure is obliquely arranged; the side slope fence is arranged along the side slope, the upstream face and the downstream face of the side slope fence are both arranged in an arc shape, and the connecting face, connected with the near-shore plane, of the side slope fence is arranged perpendicular to the side slope. The utility model discloses a modularization assembly structure, be convenient for transportation, can select the module of corresponding number according to channel slope ratio, application water depth and repair area size to carry out fast assembly, provide safe and stable dry land construction environment for channel non-cutoff repair, solve the problem of non-cutoff repair after channel slope large area damage.

Description

Technical Field

[0001] The utility model relates to the technical field of operation and maintenance of water conservancy projects, in particular to a prefabricated cofferdam for multiple canal slopes. Background Technique

[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 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 canal transports water continuously throughout the year, or is affected by extreme weather, and there will be durability and water damage problems. For small-area damage on the canal slope, methods such as underwater non-dispersible concrete pouring and underwater installation of precast concrete lining plates by divers 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 9 m along the water flow direction, and the cofferdams customized according to the canal slope inclination cannot be applied to the repair of other canal slopes, resulting in great waste. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides a prefabricated cofferdam for multiple canal slopes, and the following specific technical solutions can be adopted:

[0004] The prefabricated cofferdam for multiple canal slopes of the utility model includes a connecting section. The water-proximate side of the connecting section is a near-horizontal plane connected to the canal bottom enclosure, and the shore-proximate side of the connecting section is a near-shore plane connected to the slope enclosure; the canal bottom enclosure is arranged on the canal bottom plane, and both the water-facing surface and the back-water surface of the canal bottom enclosure are arc-shaped, the water-passing surface at the bottom of the canal bottom enclosure is vertically arranged, and the connecting surface of the canal bottom enclosure connected to the near-horizontal plane is inclined; the slope enclosure is arranged along the slope, and both the water-facing surface and the back-water surface of the slope enclosure are arc-shaped, and the connecting surface of the slope enclosure connected to the near-shore plane is perpendicular to the slope.

[0005] The connecting section is arranged in sections along the water flow direction, and the included angle between the near-horizontal plane and the near-shore plane is determined according to the slope inclination.

[0006] The canal bottom enclosure is spliced by a water-facing canal bottom foundation unit and a back-water canal bottom foundation unit, or is spliced by the water-facing canal bottom foundation unit, the back-water canal bottom foundation unit, and at least one canal bottom extension unit located between the two.

[0007] The slope enclosure is spliced by a water-facing slope foundation unit, a back-water slope foundation unit, and an entrance unit, or is spliced by the water-facing slope foundation unit, the back-water slope foundation unit, at least one slope extension unit located between the two, and the entrance unit.

[0008] The bottom supports are provided for the upstream channel bottom foundation unit, the downstream channel bottom foundation unit, the channel bottom extension unit, the upstream slope foundation unit, the downstream slope foundation unit, the slope extension unit, and the entrance unit. The mobile wheels in a lifting type are provided on both sides of the upstream slope foundation unit and the downstream slope foundation unit, outside the panel of the entrance unit, and at the bottom of the bottom support of the slope extension unit.

[0009] The bottom supports of the upstream channel bottom foundation unit, the downstream channel bottom foundation unit, the channel bottom extension unit, and the entrance unit are of fixed structures; the bottom support of the slope extension unit is of a movable structure, and each slope extension unit includes two bottom supports arranged at intervals along the water flow direction; each of the upstream slope foundation unit and the downstream slope foundation unit is provided with two bottom supports, one of which is of a fixed structure and the other is of a movable structure.

[0010] The assembled cofferdam for multiple channel slopes provided by the utility model is of 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 rapid assembly, providing a safe and stable dry construction environment for the repair of the channel without interruption of water flow, and solving the problem of non-stop water repair after large-area damage of the channel slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the structural schematic diagram of the utility model.

[0012] Figure 2 is Figure 1 the structural schematic diagram after being in place on the channel slope.

[0013] Figure 3 is Figure 2 the right view of

[0014] Figure 4 is Figure 3 the sectional view of

[0015] Figure 5a is Figure 4 the sectional view A - A of

[0016] Figure 5b is Figure 4 the enlarged view of part B of

[0017] Figure 5c is Figure 4 the enlarged view of part C of

[0018] Figure 6a and Figure 6b and Figure 6c are the schematic diagrams of cofferdam assembly for selecting different connecting joints according to the channel slope gradient.

[0019] Figure 7a It is a schematic diagram of the force on the enclosure structure of the cofferdam described in this application.

[0020] Figure 7b It is a schematic diagram of the force on the enclosure structure of the existing cofferdam.

[0021] Figure 8a 、 Figure 8b 、 Figure 8c They are schematic diagrams of the cofferdam composed of different assembly units of the present utility model. Detailed implementation manners

[0022] 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 manners and specific construction processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0023] As Figures 1 - 8c shown, the assembled cofferdam for multiple canal slopes described in the present utility model includes a connection joint 1. The water-facing side of the connection joint 1 is a near-horizontal plane 1a connected to the bottom enclosure 2 of the canal, and the shore-facing side of the connection joint 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 canal. The water-facing surface and the back water surface of the bottom enclosure 2 are both arc-shaped (to reduce water resistance), the water-passing surface 2c at the bottom of the bottom enclosure 2 is vertically arranged (to reduce the horizontal thrust of water pressure), and the connection surface of the bottom enclosure 2 connected to the near-horizontal plane 1a of the connection joint 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 connection surface of the slope enclosure 3 connected to the near-shore plane 1b of the connection joint 1 is perpendicular to the slope.

[0024] The above-mentioned connection joint 1 is divided into 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 connection joint 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 connection joint 1, so that the top surface of the slope enclosure 3 can be parallel to the canal slope, thereby facilitating maintenance personnel to enter the interior of the cofferdam and ensuring sufficient maintenance operation space.

[0025] The above-mentioned bottom enclosure 2 of the channel is composed of a foundation unit 21 at the water-facing bottom of the channel and a foundation unit 22 at the back-water-facing bottom of the channel spliced together, or composed of a foundation unit 21 at the water-facing bottom of the channel, a foundation unit 22 at the back-water-facing bottom of the channel, and at least one group of bottom expansion units 23 located between the two spliced together. 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 channel slope repair, so that the finally assembled cofferdam can cover all parts to be repaired. Among them, the bottoms of the foundation unit 21 at the water-facing bottom of the channel, the foundation unit 22 at the back-water-facing bottom of the channel, and the bottom expansion unit 23 are all water passing surfaces 2c arranged vertically (see Figure 7a ), compared with the existing bottom surface of the cofferdam perpendicular to the channel 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 normal pressure perpendicular to the top surface, correspondingly increasing the frictional force and greatly improving the slope stability of the cofferdam.

[0026] The above-mentioned slope enclosure 3 is composed of a water-facing slope foundation unit 31, a back-water-facing slope foundation unit 32, and an entrance unit 33 spliced together, or composed of a water-facing slope foundation unit 31, a back-water-facing slope foundation unit 32, at least one slope expansion unit 34 located between the two, and an entrance unit 33 spliced together. 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-facing slope foundation unit 32 and the back-water-facing 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-facing 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 channel slope. After that, the entrance unit 33 is installed on the topmost water-facing slope foundation unit 31 and back-water-facing slope foundation unit 32. The number of slope enclosure units is determined according to the water depth of the channel, so that there is a safety super elevation of 0.3 - 0.5 m between the back-water side of the slope enclosure 3 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-facing side and the entrance unit, without involving the expansion unit; 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.

[0027] The above-mentioned channel bottom foundation unit 21 on the water front side, channel bottom foundation unit 22 on the water back side, channel bottom extension unit 23, water front side slope foundation unit 31, water back side 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 a main beam arranged along the direction of the water flow and a secondary beam arranged perpendicular to the direction of the water flow. The ends of the main beam and the secondary beam are both provided with end plates 41, and the panels are welded on the end plates 41 and the top of the beams; the connecting section 1 also adopts the above-mentioned beam-plate structure. In the utility model, the connection between the connecting section 1 and the splicing unit, and the connection between the splicing units are realized by connecting adjacent end plates 41. At the same time, a water-stop structure is arranged in the panel splicing seam above the end plate 41 to realize the water sealing of the cofferdam surface.

[0028] The above-mentioned end plate 41 connection includes two modes: rigid connection and flexible connection. Specifically, Figure 5b As shown, a plurality of bolts 42 are used between adjacent end plates 41 arranged along the water flow direction to rigidly connect the pair of panel assemblies 4; Figure 5c As shown, between adjacent end plates 41 arranged perpendicular to the water flow direction, the pair of panel assemblies are flexibly connected by hinged connection between a pin 43 and a double-ear plate 44, thereby increasing the adaptability of the splicing unit to the uneven slope lining in the damaged area.

[0029] The bottom support 5 of the above-mentioned channel bottom foundation unit 21 on the water front side, the channel bottom foundation unit 22 on the water back side, the channel bottom extension unit 23 and the inlet unit 33 is a fixed structure connected to the panel assembly 4 (see Figure 4), with a frame structure above, in contact with the channel surface below, and a 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 panel in the upstream slope foundation unit 31 and the downstream slope foundation unit 32 is a fixed structure connected to the panel assembly 4, with the bottom surface in contact with the channel surface, and a water stop structure is provided on the inner edge and outer edge of the above 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 structure, including one or more hydraulic cylinder-column assemblies 51 connected to the panel assembly 4, and a support block 52 connected to the channel is provided below the hydraulic cylinder-column assembly 51. In order to improve the structural stability, two diagonal tie rods 53 are provided between each hydraulic cylinder-column assembly 51 and the panel assembly 4, and the above diagonal tie rods 53 are arranged in the plane where the water flow direction is located; at the same time, a connecting rod 54 perpendicular to the water flow direction is provided between adjacent hydraulic cylinder-column assemblies 51, and a longitudinal shear resistance device 55 is provided between the connecting rod 54 and the panel assembly 4. The setting of the above 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.

[0030] Since the cofferdam needs to slide down along the channel slope during the assembly process, lifting mobile wheels 6 are provided on both sides of the upstream slope foundation unit 31 and the downstream slope foundation unit 32, on the outer side of the panel of the entrance unit 33, and at the bottom of the movable bottom support 5. The above mobile wheels 6 are connected to the hydraulic system, and the vertical lifting of the mobile wheels 6 is controlled by the hydraulic system. When the cofferdam is in the state of assembly sliding down and rising for demolition, the mobile wheels 6 are in the supporting state in contact with the channel slope; after the cofferdam is in place, the mobile wheels 6 are in the retracted state, and their lower edges are separated from the channel slope.

[0031] It should be noted that in the description of the present invention, terms indicating orientation or positional relationships such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and 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, and therefore should not be construed as a limitation to the present invention.

Claims

1. An assembled cofferdam for multiple canal slopes, characterized in that: It includes a connecting section. The water-facing side of the connecting section is a near-horizontal plane connected to the bottom enclosure of the canal, and the shore-facing side of the connecting section is a near-shore plane connected to the slope enclosure. The bottom enclosure of the canal is arranged on the bottom plane of the canal. The water-facing surface and the back surface of the bottom enclosure are both arc-shaped, the water-passing surface at the bottom of the bottom enclosure is vertically arranged, and the connecting surface where the bottom enclosure is connected to the near-horizontal plane is inclined. The slope enclosure is arranged along the slope. The water-facing surface and the back surface of the slope enclosure are both arc-shaped, and the connecting surface where the slope enclosure is connected to the near-shore plane is perpendicular to the slope.

2. The assembled cofferdam for multi-channel slopes according to claim 1, wherein: The connecting section is arranged in sections along the water flow direction, and the included angle between the near-horizontal plane and the near-shore plane is determined according to the slope inclination angle.

3. The assembled cofferdam for multi-channel slopes according to claim 1, characterized in that: The bottom enclosure of the canal is spliced by a water-facing bottom foundation unit and a back-facing bottom foundation unit, or is spliced by the water-facing bottom foundation unit, the back-facing bottom foundation unit, and at least one group of bottom extension units located between the two.

4. The assembled cofferdam for multi-channel slopes according to claim 3, characterized in that: The slope enclosure is spliced by a water-facing slope foundation unit, a back-facing slope foundation unit, and an entrance unit, or is spliced by the water-facing slope foundation unit, the back-facing slope foundation unit, at least one slope extension unit located between the two, and the entrance unit.

5. The assembled cofferdam for multi-channel slopes according to claim 4, characterized in that: The water-facing bottom foundation unit, the back-facing bottom foundation unit, the bottom extension unit, the water-facing slope foundation unit, the back-facing slope foundation unit, the slope extension unit, and the entrance unit are all provided with bottom supports, and movable wheels with a lifting function are arranged on both sides of the water-facing slope foundation unit and the back-facing slope foundation unit, the outer side of the panel of the entrance unit, and the bottom of the bottom support of the slope extension unit.

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

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