Rapid construction method for assembling and cast-in-place mixing of water delivery canal

Abstract

The invention provides a water delivery canal assembly and cast-in-place mixed rapid construction method which comprises the following steps that S01, a slope of a canal is excavated, and the width of the slope is larger than that of the canal; s02, an assembly type bottom channel is prefabricated, the assembly type bottom channel comprises a bottom plate, inclined webs are arranged on the two sides of the bottom plate, and the height of the webs is larger than that of accumulated water in the original water channel; s03, a cushion layer is laid at the bottom of the excavated water channel; s04, the assembly type bottom channel is hoisted; s05, the hoisting assembly type bottom channel of each section is subjected to sectional type continuous tensioning; s06, after construction of the fabricated bottom channel is completed, the side plates are constructed; s07, after construction of the water channel is completed, backfilling the outer side of the water channel, filling backfilling soil between the outer side of the water channel and the side slope, and compacting the backfilling soil; the rapid construction of the water channel is completed through the steps. By the adoption of the construction method of the assembly type bottom channel and the cast-in-place type side plates, construction can be conducted in accumulated water, the construction period cannot be affected in the rainy season, the side plates are constructed in the water-free state, and the balance between the construction efficiency and the cost is achieved.

Description

Technical Field

[0001] The invention relates to the field of water delivery channel construction, in particular to a method for quickly assembling cast-in-place mixing of a water delivery channel. Background Art

[0002] The existing water channel construction generally adopts the method of vertical formwork casting or full assembly. Affected by the water accumulation at the construction site, the efficiency of full cast-in-place construction is difficult to guarantee. The setting of cofferdam and drainage greatly affects the construction efficiency. For example, the patent document CN111074852A records a method of casting channel lining concrete in situ and a method of non-linear channel lining construction, which is the existing technology of cast-in-place construction method. The casting is carried out in two pouring methods, which further affects the construction efficiency. Moreover, the appearance accuracy of this construction method is difficult to guarantee, and the shape is not regular enough. The full assembly construction method is subject to the limitations of on-site construction conditions and has many unfavorable factors, such as the heavy weight of the cast-in-place prefabricated components, the difficulty of hoisting, and the influence of foundation deformation on each assembly component. For example, for a water channel with an inclined slope, it is necessary to lay a slag foundation cushion layer and tamp the foundation on the inclined slope, which increases the construction cost and makes the high efficiency characteristics of the assembled water channel fail to be brought into play. For example, in Chinese patent documents, CN207176634U is an assembled water channel; CN213267773U is a prefabricated assembled water channel; CN211113976U is an assembled water channel; all of them are only suitable for small rectangular water channels, and are difficult to be applied to "V"-shaped water channels, and cannot meet the needs of water supply projects. CN220767938U records an assembled water channel plate embedded support device, which supports the water channel through a foldable embedded movable plate, but its implementation cost is too high, and this mechanism is not feasible for larger water channels. CN116971337A records an assembled water channel construction process, in which each segment is plugged in and matched by a snap-in protrusion and a snap-in groove, but as the component increases and the foundation deforms, this plug-in fit increases the accuracy requirements for each segment, which is affected by the terrain slope, foundation deformation, component self-deformation, and processing accuracy error. This is difficult to achieve in the actual construction process of a water channel with a width greater than 4 meters. Based on this need, a new rapid construction method suitable for "V"-shaped water diversion channels over 5 meters is designed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for rapid construction of cast-in-place mixed water channel assembly, which can improve the construction efficiency of "V"-shaped water channels with a length of more than 5 meters, especially can improve the construction efficiency of water channels under waterlogging conditions.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for rapid construction of cast-in-place mixing of water delivery channel assembly, comprising the following steps: S01. The width of the slope of the excavated canal is greater than the width of the canal; S02, prefabricated bottom channel, the prefabricated bottom channel includes a bottom plate, with inclined webs on both sides, the height of the webs is higher than the height of the water in the original channel; S03. Lay a cushion layer at the bottom of the excavated canal; S04, hoisting assembled bottom channel; S05. Conduct segmented continuous tensioning of the hoisted assembled bottom channel of each segment; S06. After the construction of the prefabricated bottom channel is completed, the side panels will be constructed; S07. After the construction of the canal is completed, backfill the outside of the canal, fill the backfill soil between the outside of the canal and the slope, and compact it; The rapid construction of the canal is completed through the above steps.

[0005] In a preferred solution, in step S02, the water channel is divided into a plurality of straight segments and curved segments, and the curved segments are fitted into a combination of a plurality of straight segments and fan-shaped segments.

[0006] In a preferred solution, horizontally extending extension seats are provided on both sides of the bottom plate, and side ribs are provided between the extension seats and the outer wall of the web plate, and the side ribs are arranged at a certain interval; Extension bars and reinforcement holes are provided on the top end surface of the web. The extension bars are used to be inserted into the steel cage of the side plate, and the reinforcement holes are used to insert the vertical bars in the steel cage, so that the steel bars of the web and the side plates are connected as one.

[0007] In a preferred solution, in steps S03 to S05, laying of the cushion layer, hoisting of the assembled bottom channel and tensioning construction can be carried out in water without draining the accumulated water.

[0008] In a preferred solution, in step S05: tensioning holes are provided in the assembled bottom channel along the longitudinal direction; A hand hole is provided at the end of the tensioning hole for installing the seventh nut, the pressure plate and the second nut sleeve; During hoisting, geotextiles are laid between the segments, prestressed tendons are inserted and expansion joint layers are installed first, then the assembled bottom channel is hoisted into place and the prestressed tendons are tensioned to the preset value.

[0009] In a preferred solution, in step S05: in one segment, one end of the prestressed tendon is located in the hand hole of the assembled bottom channel, passes through the pressure plate and is connected to the seventh nut, the other end of the prestressed tendon passes through the tensioning hole of the assembled bottom channel, another pressure plate and is connected to another seventh nut, the prestressed tendon is tensioned by the through-type hydraulic cylinder and then the seventh nut is tightened to complete the tensioning operation of the prestressed tendon; In the next section of the assembled bottom channel, the second nut sleeve is fixedly connected to the end of the prestressed tendon of the next section, and the prestressed tendon passes through the tensioning holes of the assembled bottom channel of the next section, and is connected to the pressure plate and the seventh nut. The above steps are continued to complete the tensioning of the prestressed tendons of each section.

[0010] In a preferred solution, in step S06, for straight segments, a cast-in-place method using a sliding form is used for construction; for curved segments, a cast-in-place method using a vertical form is used for construction.

[0011] In the preferred solution, S601, during the construction of the straight section, the ground is compacted in an array manner on the slope and the sliding support structure is inserted; The structure of the sliding support structure is as follows: the first screw rod passes through the first soil-pressing limit plate, the first screw rod is also provided with a first nut, and a support roller is also provided at the end of the first screw rod; the rotation direction of the support roller is along the water flow direction of the water channel; A plurality of first screw rods are driven into the compacted ground in an array arrangement, the first screw rods are perpendicular to the surface of the sliding form, and the first nuts are tightened to press the first soil compaction limit plate against the ground; the upper surfaces of the plurality of support rollers are located on a plane; S602, installing the steel cage on the upper end surface of the assembled bottom channel; The steel cage is made of vertical bars, longitudinal bars and stirrups tied or welded together. During installation, the extension bars on the upper end of the assembled bottom channel are inserted into the steel cage, and part of the vertical bars are inserted into the bar insertion holes on the upper end of the assembled bottom channel. S603. Hoist the sliding formwork, which is an inverted "U"-shaped structure. An opening for grouting and vibrating is provided at the top of the sliding formwork. The outer side of the sliding formwork, i.e., the side away from the center of the water channel, rests on the support roller of the sliding support structure and can slide along the support roller to fine-tune the position. A limit block is provided on the steel cage to limit the distance between the steel cage and the inner wall of the sliding formwork. S604. Pour concrete from the top of the slipform and fully vibrate it according to the design requirements. After initial setting, remove the slipform and pour the next section. Continue to cover the side panels with geotextiles for moisture retention and maintenance.

[0012] In the preferred solution, S611, during the construction of the curved section, the ground is compacted in an array manner on the slope and formwork support rods are inserted; The structure of the template support rod includes a third screw rod, on which a second soil-pressing limit plate and a sixth nut are arranged, and a supporting bowl-shaped pad and a fifth nut are also arranged at the top end of the third screw rod. The third screw rod is driven into the slope in an array arrangement, and the position of the top end is roughly kept flush. The sixth nut is tightened to make the second soil-pressing limit plate press against the ground to provide support; Adjust the position of the fifth nut so that the upper surfaces of the supporting bowl-shaped pads remain flush, a groove is provided at the center of the supporting bowl-shaped pad, and the opening of the groove faces upwards for accommodating the first nut sleeve; S612, first set up an outer template, a vertical rod is provided at the bottom of the outer template, and a part of the vertical rod is inserted into the hole reserved in the extension seat, and an opening is provided at a position corresponding to the outer template and the template support rod, for installing a first nut sleeve and a second screw rod; Hoisting steel cage, which is made of vertical bars, longitudinal bars and stirrups tied or welded together, with limit blocks on the steel cage to limit the distance between the steel cage and the outer and inner formworks; S613. During installation, the extension bars on the upper end of the assembled bottom channel are inserted into the steel cage, and part of the vertical bars are inserted into the bar insertion holes on the upper end of the assembled bottom channel; The second screw rod passes through the steel cage and the sealing gasket, the first nut sleeve at the end of the second screw rod is fixedly connected with the third screw thread, and the fourth nut is tightened to fix the position of the outer template; Adjust the position of the third nut, set the inner template, the inner template is also provided with an opening corresponding to the template support rod, the second screw rod passes through the opening and tightens the second nut to fix the inner template; S614. Pour concrete from the top, remove the formwork after initial setting, cover the side panels with geotextile and continue curing.

[0013] In the preferred solution, in step S07, before backfilling, check whether there is a leak in the water in the canal. If a leak is found, the leak is first removed and then backfilled. The treatment methods include repairing with polymer mortar grouting, partial replacement and repairing of the expansion joint layer.

[0014] The present invention provides a method for rapid construction of a water channel by assembling cast-in-place mixed construction. By adopting the construction method of assembled bottom channel and cast-in-place side panels, the construction can be carried out in accumulated water, and the rainy season will not affect the construction period. The side panels are constructed in a waterless state, achieving a balance between construction efficiency and cost, and greatly improving construction efficiency. The scheme of the present invention also avoids the construction process of compacting the slope, and the method of backfilling after casting greatly reduces labor and further improves construction efficiency. Moreover, the water channel constructed by the present invention has a regular shape and beautiful appearance. A balance is achieved between cost, benefit and efficiency, which is conducive to the implementation of transformation. It is suitable as a standard construction scheme for large and medium-sized water transfer projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic top view of the water delivery channel of the present invention.

[0016] Figure 2 It is a schematic cross-sectional view of the fabricated bottom channel of the present invention.

[0017] Figure 3 It is a schematic cross-sectional view of the slipform construction on one side of the water delivery channel of the present invention.

[0018] Figure 4 It is a schematic cross-sectional view of the slipform construction on the other side of the water delivery channel of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the water delivery channel after backfilling of the present invention.

[0020] Figure 6 It is a schematic diagram of the sliding support structure of the present invention.

[0021] Figure 7 It is a partial front view of the assembled bottom channel of the present invention.

[0022] Figure 8 It is a schematic diagram of the structure of the assembled bottom channel after connection of the present invention.

[0023] Fig. 9 It is a schematic diagram of the connection structure of the prestressed reinforcement of the assembled bottom channel of the present invention.

[0024] Fig.10 It is a schematic diagram of the connection structure of the prestressed tendons of the present invention.

[0025] Fig.11 It is a schematic diagram of the structure of the water delivery channel of the present invention when the molds on both sides are cast in situ.

[0026] Fig.12 It is a schematic structural diagram of the template support rod of the present invention.

[0027] Fig.13 It is a partial schematic diagram of the top end surface of the assembled bottom channel of the present invention.

[0028] In the figure: water channel 1, slope 2, assembled bottom channel 3, bottom plate 31, web 32, tensioning hole 33, extension rib 34, extension seat 35, hand hole 36, side rib 37, reinforcement hole 38, water accumulation 4, cushion layer 5, sliding support structure 6, first soil pressure limit plate 61, first nut 62, first screw 63, support roller 64, prestressed rib 7, template support rod 8, second nut 81, third nut 82, second screw 83, fourth nut 84, Sealing gasket 85, first nut sleeve 86, supporting bowl-shaped gasket 87, fifth nut 88, sixth nut 89, third screw rod 801, second soil pressing limit plate 802, backfill soil 9, slip formwork 10, steel cage 11, limit block 111, vertical reinforcement 112, longitudinal reinforcement 113, stirrups 114, side plate 12, seventh nut 13, pressure plate 14, second nut sleeve 15, expansion joint 16, inner formwork 17, surrounding order 18, outer formwork 19. DETAILED DESCRIPTION

[0029] like Figure 1 As shown in , a certain irrigation project requires the construction of a canal 1, which includes multiple straight segments A, straight segment C, and curved segment B. Because there are buildings or mountains on both sides of the canal 1, the curved segment is relatively complex. Affected by surface runoff, there is a lot of water 4 in the canal 1. In the early stage, the slipform construction scheme was considered, which required the setting of cofferdams to block water and the setting of water collection wells to drain the water before construction. The construction efficiency was low, and it was difficult to construct the slipform at the location of the curved segment B. The slope construction method of the vertical formwork cast-in-place construction was difficult and the appearance was not beautiful. It was necessary to set up cofferdams to block water and pump water in sections, and the construction efficiency was low. Since the width of the canal 1 exceeds 5 meters, the assembled water channel components are large in size and difficult to transport to the site. In addition, the side walls are "V" shaped. This cantilever structure also makes hoisting very difficult, and the wall thickness of the overall structure needs to be increased, which also increases the construction cost.

[0030] In order to overcome the above construction difficulties, the present invention proposes a method for rapid construction of cast-in-place mixing of water delivery channel assembly, comprising the following steps: S1, divide the canal 1 into a plurality of straight segments and curved segments in the downstream direction, preferably, the straight segment is prepared into a prefabricated bottom canal 3 with a segment of 30 meters; the curved segment is fitted into a plurality of straight segments and fan-shaped segments; Figure 1 as shown in .

[0031] S2, excavating the slope of the canal 1, the width of the slope is greater than the width of the canal 1; S3, prefabricated bottom channel 3, the length of a single prefabricated bottom channel 3 is 30 meters, and the straight line segment and fan-shaped segment used for fitting need to be prepared according to the actual length of the curve segment fitting; like Figure 2 As shown in the figure, the assembled bottom channel 3 includes a bottom plate 31 with inclined webs 32 on both sides. The height of the webs 32 is higher than the height of the water accumulation 4 in the original channel, so that the part above the webs 32 can be constructed without water, while also reducing the volume and weight of the assembled bottom channel 3.

[0032] In this example, the width of the bottom plate 31 of the prefabricated bottom channel 3 is 6 meters, the width at the web 32 is 7.4 meters, the height is 2.1 meters, and the wall thickness is 0.2 meters. Horizontally extending extension seats 35 are provided on both sides of the bottom plate 31, and side ribs 37 are provided between the extension seats 35 and the outer wall of the web 32. The side ribs 37 are arranged at intervals of 1 to 1.2 meters. This structure ensures strength while reducing the overall weight. The 330-meter section of the prefabricated bottom channel in this example is about 150t. It can be equipped with a 160t all-terrain truck crane for centralized construction. Reduce the need for special construction equipment, such as crawler cranes. For ease of observation, Figures 7 to 10 Partial cut-off is shown.

[0033] like Figures 2~5In the embodiment of the present invention, an extension rib 34 and a rib insertion hole 38 are provided at the top of the web 32. The extension rib 34 is used to be inserted into the steel cage 11 of the side plate 12, and the rib insertion hole 38 is used to insert the vertical ribs in the steel cage 11 so that the web 32 and the steel bars of the side plate 12 are connected as one.

[0034] like Figures 2~5 In the embodiment, tensioning holes 33 are provided in the longitudinal direction of the assembled bottom channel 3. In this example, the tensioning holes 33 are arranged at positions spaced a certain distance apart on the bottom plate 31 and the web plate 32. A hand hole 36 is provided at the end of the tensioning hole 33 for installing the seventh nut 13, the pressure plate 14 and the second nut sleeve 15.

[0035] S4. Lay a cushion layer 5 at the bottom of the excavated canal. The cushion layer 5 is made of graded crushed stone and rolled flat. The cushion layer can be directly constructed in the accumulated water 4.

[0036] S5. The assembled bottom channel 3 is hoisted on site. During hoisting, geotextiles are laid between the segments, prestressed tendons 7 are inserted and expansion joint layers 16 are installed, and then the assembled bottom channel 3 is hoisted into place. The assembled bottom channel 3 of each segment is hoisted and continuously tensioned in sections; the prestressed tendons 7 are tensioned to a preset value.

[0037] like Fig. 9 , 10 As shown, in one section, one end of the prestressed tendon 7 is located in the hand hole 36 of the assembled bottom channel 3, passes through the pressure plate 14 and is connected to the seventh nut 13, and the other end of the prestressed tendon 7 passes through the tensioning hole 33 of the assembled bottom channel 3, another pressure plate 14 is connected to another seventh nut 13, and the prestressed tendon 7 is tensioned by the through-type hydraulic cylinder and then the seventh nut 13 is tightened to complete the tensioning operation of the prestressed tendon 7. Usually, the tensioning will be stretched to 105% of the preset value, and after holding the force for a period of time, it will be restored to 100% of the preset value. In the assembled bottom channel 3 of the next section, the second nut sleeve 15 is fixedly connected to the end of the prestressed tendon 7 of the next section, and the prestressed tendon 7 passes through the tensioning hole 33 of the assembled bottom channel 3 of the next section, and the pressure plate 14 is connected to the seventh nut 13, and the above steps are continued to complete the tensioning of the prestressed tendons 7 of each section. And the position of the contraction layer 16 is compressed, which has a better waterproof effect.

[0038] S6. After the construction of the assembled bottom channel 3 is completed, the side panels 12 can be constructed simultaneously. For the straight sections A and C, it is preferred to use the sliding form 10 for cast-in-place construction. For the curved section B, it is preferred to use the vertical formwork for cast-in-place construction. Since the top end surface of the assembled bottom channel 3 is located above the water surface of the accumulated water 4, the side panels 12 can be constructed under dry conditions, and the construction efficiency is high.

[0039] S601, such as Figures 3-5 In the construction of the straight sections A and C, the ground is compacted in an array on the slope and the sliding support structure 6 is inserted; like Figure 3 , 4 In 6, the structure of the sliding support structure 6 is that the first screw rod 63 passes through the first soil-pressing limit plate 61, the first screw rod 63 is further provided with a first nut 62, and a support roller 64 is further provided at the end of the first screw rod 63. The rotation direction of the support roller 64 is along the water flow direction of the water channel 1.

[0040] A plurality of first screw rods 63 are driven into the compacted ground in an array arrangement, the first screw rods 63 are perpendicular to the surface of the sliding form 10, and the first nut 62 is tightened to press the first soil compaction limit plate 61 onto the ground, so that the upper surfaces of the plurality of support rollers 64 are located on a plane.

[0041] S602, installing the steel cage 11 on the upper end surface of the assembled bottom channel 3. The steel cage 11 is formed by tying or welding vertical bars 112, longitudinal bars 113 and stirrups 114. During installation, the extension bars 34 on the upper end surface of the assembled bottom channel 3 are inserted into the steel cage 11, and part of the vertical bars 112 are inserted into the bar insertion holes 38 on the upper end surface of the assembled bottom channel 3.

[0042] S603, hoisting the slipform 10, which is an inverted "U"-shaped structure, with an opening for grouting and vibrating at the top of the slipform 10, and the outer side of the slipform 10, that is, the side away from the center of the water channel 1, leans on the support roller 64 of the sliding support structure 6, and can fine-tune the position along the support roller 64. A limit block 111 is provided on the steel cage 11 to limit the distance between the steel cage 11 and the inner wall of the slipform 10.

[0043] S604, pour concrete from the top of the slipform 10 and fully vibrate according to the design requirements. After initial setting, remove the slipform 10 to the next section for pouring. The length of the slipform 10 in this example is 6 meters. The spacing of the expansion joints is consistent with the expansion joints of the bottom assembled bottom channel 3. After the slipform 10 is removed, the side panels 12 continue to be covered with geotextiles for moisture maintenance. If construction is in winter, insulation and anti-freezing measures must also be taken.

[0044] S611, such as Fig.11 As shown in , when constructing the curved section B, the ground is compacted in an array manner on the slope and the formwork support rods 8 are inserted; like Fig.11 , 12As shown in , the structure of the template support rod 8 includes a third screw rod 801, on which a second soil-pressing limit plate 802 and a sixth nut 89 are provided, and a support bowl pad 87 and a fifth nut 88 are also provided at the top end of the third screw rod 801. The third screw rod 801 is driven into the slope in an array arrangement, and the position of the top end is kept roughly flush. The sixth nut 89 is tightened to make the second soil-pressing limit plate 802 press against the ground to provide support. The position of the fifth nut 88 is adjusted to keep the upper surface of each support bowl pad 87 flush. A groove is provided in the center of the support bowl pad 87, and the opening of the groove faces upward to accommodate the first nut sleeve 86.

[0045] S612, such as Fig.11 As shown in the figure, an outer template 19 is first set up, and a vertical rod is provided at the bottom of the outer template 19, which is partially inserted into the hole reserved in the extension seat 35. An opening is provided at the position corresponding to the outer template 19 and the template support rod 8 for installing the first nut sleeve 86 and the second screw 83.

[0046] The steel cage 11 is hoisted. The steel cage 11 is formed by binding or welding vertical bars 112, longitudinal bars 113 and stirrups 114. A limit block 111 is provided on the steel cage 11 to limit the distance between the steel cage 11 and the outer formwork 19 and the inner formwork 17.

[0047] S613. During installation, the extension ribs 34 on the upper end face of the assembled bottom channel 3 are inserted into the steel cage 11, and part of the vertical ribs 112 are inserted into the rib insertion holes 38 on the upper end face of the assembled bottom channel 3. The second screw 83 passes through the steel cage 11 and the sealing gasket 85, and the first nut sleeve 86 at the end of the second screw 83 is threadedly fixedly connected with the third screw 801. The sealing gasket 85 uses two "C"-shaped gaskets, and the openings of the sealing gasket 85 are staggered and stacked to form a grout-stopping structure. The fourth nut 84 is tightened to fix the position of the outer template 19. The position of the third nut 82 is adjusted, and the inner template 17 is set. The bottom of the inner template 17 is temporarily supported by wooden strips. The inner template 17 is also provided with an opening corresponding to the template support rod 8. The second screw 83 passes through the opening and tightens the second nut 81 to fix the inner template 17. Install the enclosure 18 to strengthen the template structure. If necessary, additional tie rod screws can be added. Concrete is poured from the top, preferably C30 or C40 concrete. After sufficient vibration according to the design requirements, it is cured with the formwork, and after initial setting, the formwork is removed, and the geotextile is covered with the side plate 12 for continued curing. If it is constructed in winter, insulation and antifreeze measures are also required. The construction length can be the same as the length of the assembled bottom channel 3 by using the vertical formwork cast-in-place method.

[0048] S7. After the construction of the canal 1 is completed, backfill is performed on the outside of the canal 1, and the backfill soil is filled between the outside of the canal 1 and the slope and compacted.

[0049] Before backfilling, check whether there is a leak in the water channel. If a leak is found, the leak is first removed and then backfilled. The treatment methods include grouting and repairing with polymer mortar, partial replacement and repair of the expansion joint layer 16, etc.

[0050] Through the above steps, the rapid construction of the water channel 1 is completed. During the construction process, because there is no need to completely drain the accumulated water, the water can be used for construction, which greatly improves the efficiency of the project construction, especially suitable for the southern region where the dry season and rainy season are more distinct.

[0051] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for rapid construction of cast-in-place mixing of water channel assembly, characterized by: The following steps are involved: S01, excavating a slope of the canal (1), wherein the width of the slope is greater than the width of the canal (1); S02, a prefabricated bottom channel (3), the prefabricated bottom channel (3) comprising a bottom plate (31), with inclined webs (32) provided on both sides, the height of the webs (32) being higher than the height of the accumulated water (4) in the original channel; S03, laying a cushion layer (5) at the bottom of the excavated canal; S04, hoisting assembled bottom channel (3); S05, performing segmented continuous tensioning on the hoisted assembled bottom channel (3) of each segment; S06. After the construction of the assembled bottom channel (3) is completed, the side plate (12) is constructed; S07. After the construction of the water channel (1) is completed, backfill is performed on the outer side of the water channel (1), and the backfill soil is filled between the outer side of the water channel (1) and the slope, and compacted; The above steps complete the rapid construction of the water channel (1).

2. A method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 1, characterized in that: In step S02, the water channel (1) is divided into a plurality of straight segments and curved segments, and the curved segments are fitted into a combination of a plurality of straight segments and fan-shaped segments.

3. A method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 1, characterized in that: Horizontally extending extension seats (35) are provided on both sides of the bottom plate (31), and side ribs (37) are provided between the extension seats (35) and the outer wall of the web plate (32), and the side ribs (37) are arranged at a certain interval; An extension rib (34) and a rib insertion hole (38) are provided on the top end surface of the web (32), wherein the extension rib (34) is used to be inserted into the steel cage (11) of the side plate (12), and the rib insertion hole (38) is used to allow the vertical ribs in the steel cage (11) to be inserted, so that the steel bars of the web (32) and the side plate (12) are connected as one.

4. A method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 1, characterized in that: In steps S03 to S05, laying of the cushion layer, hoisting of the assembled bottom channel and tensioning construction can be carried out in water without draining the accumulated water.

5. According to the method for rapid construction of cast-in-place mixing of water delivery channel assembly as described in claim 1, it is characterized by the following steps: In S05: a tensioning hole (33) is provided in the assembled bottom channel (3) along the longitudinal direction; A hand hole (36) is provided at the end of the tensioning hole (33) for mounting the seventh nut (13), the pressure plate (14) and the second nut sleeve (15); During hoisting, geotextiles are laid between the segments, prestressed tendons (7) are inserted and expansion joint layers (16) are installed, and then the assembled bottom channel (3) is hoisted into place and the prestressed tendons (7) are tensioned to a preset value.

6. A method for rapid construction of a water channel assembly cast-in-place mixing according to claim 5, characterized in that the steps In S05: in a segment, one end of the prestressed tendon (7) is located in the hand hole (36) of the assembled bottom channel (3), passes through the pressure plate (14) and is connected to the seventh nut (13), and the other end of the prestressed tendon (7) passes through the tensioning hole (33) of the assembled bottom channel (3), another pressure plate (14) and is connected to another seventh nut (13), and the prestressed tendon (7) is tensioned by a through-type hydraulic cylinder and then the seventh nut (13) is tightened to complete the tensioning operation of the prestressed tendon (7); In the assembled bottom channel (3) of the next section, the second nut sleeve (15) is fixedly connected to the end of the prestressed tendon (7) of the next section, and the prestressed tendon (7) passes through the tensioning hole (33) of the assembled bottom channel (3) of the next section, and the pressure plate (14) is connected to the seventh nut (13), and the above steps are continued to complete the tensioning of the prestressed tendons (7) of each section.

7. According to the method for rapid construction of cast-in-place mixing of water delivery channel assembly as claimed in claim 2, characterized in that the steps In S06, for the straight segments (A, C), the cast-in-place method using a slip form (10) is used for construction; for the curved segment (B), the cast-in-place method using a vertical form is used for construction.

8. A method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 7, characterized in that: S601, during the construction of the straight segments (A, C), the ground is compacted in an array on the slope and the sliding support structure (6) is inserted; The structure of the sliding support structure (6) is as follows: a first screw rod (63) passes through a first soil-pressing limiting plate (61); a first nut (62) is also provided on the first screw rod (63); and a support roller (64) is also provided at the end of the first screw rod (63); the rotation direction of the support roller (64) is along the flow direction of the water channel (1); Driving a plurality of first screw rods (63) into the compacted ground in an array arrangement, the first screw rods (63) being perpendicular to the surface of the sliding form (10), tightening the first nut (62) to press the first soil compaction limit plate (61) against the ground; and making the upper surfaces of the plurality of support rollers (64) be located on a plane; S602, installing the steel cage (11) on the upper end surface of the assembled bottom channel (3); The steel cage (11) is formed by tying or welding vertical bars (112), longitudinal bars (113) and stirrups (114). During installation, the extension bars (34) on the upper end surface of the assembled bottom channel (3) are inserted into the steel cage (11), and part of the vertical bars (112) are inserted into the bar insertion holes (38) on the upper end surface of the assembled bottom channel (3); S603, hoisting the sliding form (10), wherein the sliding form (10) is an inverted "U"-shaped structure, and an opening for grouting and vibrating is provided at the top of the sliding form (10), and the outer side of the sliding form (10), that is, the side away from the center of the water channel (1), leans on the support roller (64) of the sliding support structure (6), and can slide along the support roller (64) to fine-tune the position; a limit block (111) is provided on the steel cage (11) to limit the distance between the steel cage (11) and the inner wall of the sliding form (10); S604, pour concrete from the top of the slipform (10), fully vibrate according to the design requirements, and after initial setting, remove the slipform (10) to cast the next section, and continue to cover the side plate (12) with geotextile for moisture retention and maintenance.

9. A method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 7, characterized in that: S6 11. When constructing the curved section (B), compact the ground in an array on the slope and insert the formwork support rods (8); The structure of the template support rod (8) comprises a third screw rod (801), on which a second soil pressing limit plate (802) and a sixth nut (89) are provided, and a support bowl-shaped pad (87) and a fifth nut (88) are also provided at the top end of the third screw rod (801). The third screw rod (801) is driven into the slope in an array arrangement, and the position of the top end is kept roughly flush. The sixth nut (89) is tightened so that the second soil pressing limit plate (802) is pressed against the ground to provide support; The position of the fifth nut (88) is adjusted so that the upper surfaces of the supporting bowl-shaped pads (87) remain flush, and a groove is provided at the center of the supporting bowl-shaped pad (87), with the opening of the groove facing upwards for accommodating the first nut sleeve (86); S612, first setting an outer template (19), wherein a vertical rod is provided at the bottom of the outer template (19), and a portion of the vertical rod is inserted into a hole reserved in the extension seat (35), and an opening is provided at a position of the outer template (19) corresponding to the template support rod (8) for installing a first nut sleeve (86) and a second screw rod (83); A steel cage (11) is hoisted, wherein the steel cage (11) is formed by binding or welding vertical bars (112), longitudinal bars (113) and stirrups (114), and a limit block (111) is provided on the steel cage (11) for limiting the distance between the steel cage (11) and the outer formwork (19) and the inner formwork (17); S613, during installation, the extension bars (34) on the upper end surface of the assembled bottom channel (3) are inserted into the steel cage (11), and part of the vertical bars (112) are inserted into the bar insertion holes (38) on the upper end surface of the assembled bottom channel (3); The second screw rod (83) is passed through the steel cage (11) and the sealing gasket (85), the first nut sleeve (86) at the end of the second screw rod (83) is threadedly fixedly connected to the third screw rod (801), and the fourth nut (84) is tightened to fix the position of the outer template (19); The position of the third nut (82) is adjusted, and the inner template (17) is set. The inner template (17) is also provided with an opening corresponding to the template support rod (8). The second screw rod (83) passes through the opening and tightens the second nut (81) to fix the inner template (17); S614. Pour concrete from the top, remove the formwork after initial setting, cover the side panels (12) with geotextile and continue curing.

10. The method for rapid construction of cast-in-place mixing of water delivery channel assembly according to claim 1, characterized in that: In step S07, before backfilling, check whether there is a leak in the water in the canal. If a leak is found, the leak is first removed and then backfilled. The treatment method includes grouting with polymer mortar, partial replacement and repair of the expansion joint layer (16).

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