precast channel

Abstract

The utility model provides a prefabricated channel relates to water conservancy engineering irrigation and drainage channel technical field. The prefabricated channel realizes the effective link of section through setting up support step and lap overstep at U type channel groove both ends, effectively avoids the dislocation of assembling lap joint and the damage of water stop, the joint of each section U type channel groove is constituted the combined type seepage prevention system by the joint surface sealing filler and the built -in water stop band, has improved the leakproofness and water stop effect of joint surface greatly, the top of channel groove adopts hidden type protection cover plate to cover, can strengthen the safety protection of irrigation and drainage channel, can slow down the silting of groove bottom obviously, is favorable to the later operation management maintenance, the wall body adopts the gradual expansion structure of overcurrent surface vertical, retaining soil surface inclination, can guarantee the overcurrent surface after the assembly of each adjacent U type channel groove is always even and straight, avoids the heterofacial convex, improves the flow state, U type channel groove adopts the whole prefabricated thin wall type structure, safe and stable, economic and practical, simple structure, can prefabricate or purchase the factory prefabricated product on the spot.

Description

Technical Field

[0001] This utility model relates to the field of irrigation and drainage channel technology in water conservancy projects, specifically to a prefabricated channel. Background Technology

[0002] In recent years, with the rapid development and transformation of modern water conservancy projects, a series of major initiatives have been implemented, including the construction of high-standard farmland projects, agricultural irrigation water diversion and transfer, long-distance water supply and transmission, and further improvement of flood control and drainage systems in low-lying areas. Irrigation and drainage channels play a crucial role in these projects for drainage, drought relief, flood control and disaster reduction.

[0003] Canals generally adopt structural forms such as trapezoidal cross-section earthen canals or trapezoidal cross-section lined canals, concrete rectangular canals, and concrete U-shaped canals. Due to constraints such as land use boundaries and construction period, the application of concrete rectangular canals and U-shaped canals is becoming more and more widespread.

[0004] Traditional rectangular and U-shaped concrete channels are mostly cast-in-place structures. To meet the requirements of water-stop installation at the joints, the dimensions of the channel bottom slab and wall structure are generally large, resulting in poor economic efficiency. Furthermore, the linear construction period is relatively long due to the influence of concrete curing time. With the increasing maturity of factory manufacturing processes for concrete structures, precast or assembled U-shaped channels have gradually been applied. However, in engineering practice, the level of construction technology varies, often resulting in misalignment and cracking at the joints of the U-shaped channels, damage to the joint water-stop, and leakage. Cement mortar is often used to fill and coat the joints, which is difficult to implement, has low sealing performance, and poor water-stopping effect. The lack of fixed lifting holes during U-shaped channel fabrication necessitates bottom-lifting for placement on-site, which is prone to detachment and overturning during operation, affecting construction safety. The installation of the top of the precast U-shaped channel also presents challenges. The lack of adequate protection and the absence of matching covers pose a safety hazard, increasing the risk of falls and accidents for nearby residents and children. It also allows debris such as leaves and floating objects to freely enter the canals, accumulating over time and causing blockages that impair irrigation and drainage efficiency. Furthermore, the U-shaped canal walls typically have a fixed slope for the flow surface and a vertical retaining surface. When adjacent U-shaped canals with different wall heights are assembled, they often exhibit convex shapes with different sides, resulting in poor overall integrity and facade coordination. This makes it impossible to ensure a consistently flat and straight flow surface, further reducing the canal's flow capacity. These problems and deficiencies severely impact the normal service life, structural safety, and construction safety of the irrigation and drainage channels, and also create inconvenience for later operation, management, and daily maintenance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a prefabricated channel that solves the problem of poor sealing and water-stopping effects caused by the easy overlap, misalignment, and cracking of the U-shaped channel sections.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A prefabricated channel, the prefabricated channel comprising: a plurality of U-shaped channels, joint sealing components and protective covers;

[0008] The U-shaped channel is a reinforced concrete U-shaped structure with a precast base plate and walls. Supporting steps and overlapping inverted steps are respectively provided at the beginning and end of the U-shaped channel, and the supporting steps and overlapping inverted steps are matched and spliced ​​with each other. The top inner side of the walls on both sides is provided with sunken support slots.

[0009] The joint sealing assembly includes: sealing filler and waterstop strip;

[0010] The inner wall of the joint between the supporting step and the overlapping step is provided with a concave groove, and the middle of the inner wall of the lower step of the supporting step is provided with a concave water-stop groove. The overlapping step and the water-stop groove are matched at a plane. The sealing filler is filled in the groove, and the water-stop strip is installed in the water-stop groove.

[0011] The protective cover is installed inside the support groove.

[0012] Preferably, the bottom plate is a flat bottom plate with a uniform thickness, the plate thickness h is 0.13m to 0.20m, and a 0.10m thick C15 plain concrete pad layer is provided at the bottom.

[0013] Preferably, the wall adopts a variable cross-section side wall structure with unequal thickness, the wall height H is 0.60m to 1.50m, the flow surface is vertical and is connected by a reverse arc at the bottom plate support, the arc radius R is 0.08m to 0.10m, and the retaining surface gradually expands from the top to the bottom plate.

[0014] The wall has a net top width B of 0.40m to 1.20m and a top thickness b of 0.13m to 0.15m, and is arranged symmetrically.

[0015] Preferably, the support groove has a groove width b1 of 0.11m and a groove depth h1 of 0.09m.

[0016] Preferably, the wall body has multiple hoisting holes at the same height, and the number of hoisting holes on a single U-shaped channel section is not less than four; a steel sleeve is embedded in the hoisting hole.

[0017] Preferably, the U-shaped channel is made of a steel mesh composed of HRB400 grade steel bars arranged in a single layer in both directions, with the steel bars having a diameter of 10mm-14mm; the hoisting holes penetrate the wall through the mesh openings of the steel mesh.

[0018] Preferably, the sealing filler inside the groove of the cover is polysulfide sealant, with an embedding depth t of 15mm-25mm and a width w of 20mm-40mm; the waterstop is a water-swellable waterproof rubber strip with a strip width of 20mm-30mm and a thickness of 10mm-20mm.

[0019] Preferably, the concrete strength grade of the U-shaped channel 10 is not lower than C35.

[0020] Preferably, the protective cover is a precast reinforced concrete slab with a concrete strength grade of not less than C30 and a slab thickness of 0.08m; the interior of the protective cover is made of HPB300 grade steel bars arranged in a single layer in both longitudinal and transverse directions, with a steel bar diameter of 8mm to 10mm.

[0021] Preferably, the top surface of the protective cover plate has multiple ring lug grooves, and ring lugs are provided in the ring lug grooves. The height of the top of the ring lugs is lower than the height of the top surface of the protective cover plate. The ring lugs are wavy parts, and the two ends of the ring lugs are pre-embedded in the protective cover plate.

[0022] This invention provides a prefabricated channel. Compared with the prior art, it has the following advantages:

[0023] In this invention, the prefabricated channel achieves effective connection between sections by setting supporting steps and overlapping inverted steps at both ends of the U-shaped channel, ensuring a tight fit and effectively preventing misalignment, cracking, and water-stopping damage during assembly. The joints of each U-shaped channel section are constructed using a combined anti-seepage system consisting of joint surface sealing filler and an internal waterstop, greatly improving the sealing and water-stopping effect of the joint surface. The channel wall is equipped with lifting holes and matching steel sleeves, facilitating construction and ensuring construction safety while protecting the concrete structure of the wall and preventing water damage. Localized damage at the hoisting holes; the top opening of the channel is covered with a concealed protective cover, which not only enhances the safety of the irrigation and drainage channels but also significantly reduces the siltation at the bottom of the channel, facilitating later operation, management, and maintenance; the wall adopts a vertical flow surface and a gradually expanding retaining surface structure, which ensures that the flow surface of each adjacent U-shaped channel remains flat and straight after assembly, avoiding uneven protrusions and improving the flow pattern; the U-shaped channel adopts an integral prefabricated thin-walled structure, which is safe, stable, economical, practical, and simple in structure, and can be prefabricated on-site or purchased as factory-prefabricated products. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the assembly structure of several U-shaped channels in an embodiment of this utility model.

[0026] Figure 2 This is an exploded view of the assembled structure of several U-shaped channels in an embodiment of this utility model.

[0027] Figure 3 This is a vertical cross-sectional view of the U-shaped channel in an embodiment of this utility model.

[0028] Figure 4 This is an enlarged view of the top of the U-shaped channel wall in an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the reinforcement of a single section of the U-shaped channel in an embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of the joint sealing component in an embodiment of this utility model.

[0031] Figure 7 This is a top view of the protective cover plate in an embodiment of this utility model.

[0032] Figure 8 This is a vertical cross-sectional view of the protective cover plate in an embodiment of this utility model.

[0033] The reference numerals in the figure are set as follows: U-shaped channel 10, bottom plate 11, wall 12, supporting step 13, overlapping inverted step 14, supporting groove 15, hoisting hole 16, C15 plain concrete cushion layer 17, joint water-stop component 20, sealing filler 21, waterstop strip 22, protective cover plate 30, ring lug groove 31, ring lug 32. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] This application provides a prefabricated channel, which solves the problem that the U-shaped channel sections of the prefabricated channel are prone to overlapping, misalignment, and cracking, resulting in poor sealing and water-stopping effects.

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] Example:

[0038] like Figures 1-8 As shown, this utility model provides a prefabricated channel, which includes: a plurality of U-shaped channels 10, joint water-stopping components 20 and protective covers 30;

[0039] The U-shaped channel 10 is a reinforced concrete U-shaped structure prefabricated as a whole, consisting of a base plate 11 and a wall 12. Support steps 13 and overlapping inverted steps 14 are respectively provided at the beginning and end of the U-shaped channel 10. The support steps 13 and overlapping inverted steps 14 are matched and spliced ​​to restrict the displacement between adjacent channel sections, so as to achieve a tight connection of the nodes. The top inner side of the two side walls 12 is provided with a sunken support slot 15.

[0040] The joint sealing component 20 includes: sealing filler 21 and waterstop strip 22;

[0041] The inner wall of the joint between the supporting step 13 and the overlapping step 14 is provided with a concave groove. The middle of the inner wall of the lower step of the supporting step 13 is provided with a concave water-stop groove. The overlapping step 14 and the water-stop groove are matched at a plane. The sealing filler 21 is filled in the groove, and the water-stop strip 22 is installed in the water-stop groove.

[0042] The U-shaped channel 10 is located on top of the foundation surface of the trench excavation.

[0043] The protective cover plate 30 is installed inside the support groove 15.

[0044] The U-shaped channel 10 has a concrete strength grade of not less than C35, and has the dual functions of retaining soil in the channel body and allowing flow in the channel. It has good overall structural integrity, high rigidity, and small deformation.

[0045] like Figure 3 As shown, the base plate 11 is a flat base plate with a uniform thickness section, and the plate thickness h is 0.13m to 0.20m. A 0.10m thick C15 plain concrete cushion layer 17 is provided at the bottom.

[0046] like Figure 3 As shown, the wall 12 adopts a variable cross-section side wall structure with unequal thickness. The wall height H is 0.60m to 1.50m. The flow surface is vertical and is connected by a reverse arc at the fixed support of the bottom plate 11. The arc radius R is 0.08m to 0.10m. The retaining surface gradually expands from the top to the bottom plate. This can effectively avoid stress concentration at the root of the wall 12 and ensure that the flow surface of adjacent U-shaped channels 10 with different wall heights is always flat and straight during assembly, avoiding uneven protrusions that would affect the flow.

[0047] The net width B of the top opening of the wall 12 is 0.40m to 1.20m, and the thickness b of the top of the wall is 0.13m to 0.15m, and they are arranged symmetrically.

[0048] like Figure 4As shown, the width b1 of the support groove 15 is 0.11m and the depth h1 is 0.09m.

[0049] like Figures 1-5 As shown, the wall 12 has multiple hoisting holes 16 at the same height, and the number of hoisting holes 16 on a single U-shaped channel 10 is no less than four.

[0050] The number of lifting holes 16 per section is four. The center of the lifting holes 16 is located about 0.2m below the top of the wall 12 and about 0.5m axially from the free edges at both ends.

[0051] like Figure 3 , Figure 4 As shown, a steel sleeve is embedded in the lifting hole 16. The outer diameter of the steel sleeve matches the inner diameter of the lifting hole 16, and the inner diameter of the steel sleeve is larger than the diameter of the steel wire rope used for lifting.

[0052] like Figure 5 As shown, the axial length of a single section of the U-shaped channel 10 is 2m-3m. The U-shaped channel 10 is filled with a steel mesh made of HRB400 grade steel bars arranged in a single layer in both directions, with a steel bar diameter of 10mm-14mm. The hoisting hole 16 penetrates the wall 12 through the mesh of the steel mesh. The steel mesh around the hoisting hole 16 can effectively ensure the structural stability of the hoisting hole 16.

[0053] like Figure 6 As shown, the sealing filler 21 inside the cover groove is made of polysulfide sealant, with an embedding depth t of 15mm-25mm and a width w of 20mm-40mm.

[0054] The waterstop 22 is made of water-swellable waterproof rubber strip with a width of 20mm to 30mm and a thickness of 10mm to 20mm. It is embedded in the waterstop groove and fixedly arranged in a "U" shape along the bottom plate 11 and the two side walls 12 of the U-shaped channel 10.

[0055] like Figure 1 , Figure 2 As shown, the protective cover plate 30 is a segmented precast reinforced concrete slab with a concrete strength grade of not less than C30 and a slab thickness of 0.08m.

[0056] like Figure 7 , Figure 8 As shown, the protective cover plate 30 is made of HPB300 grade steel bars arranged in a single layer in both longitudinal and transverse directions, with a steel bar diameter of 8mm to 10mm.

[0057] like Figure 7 , Figure 8As shown, the top surface of the protective cover plate 30 is provided with multiple ring ear grooves 31, and ring ears 32 are provided in the ring ear grooves 31. The top height of the ring ears 32 is lower than the top surface height of the protective cover plate 30, so that the ring ears 32 are hidden in the ring ear grooves 31 and are not exposed. This can realize the hoisting operation of the protective cover plate 30 and ensure that the ring ears 32 do not protrude from the top surface of the protective cover plate 30, which is conducive to the stacking and storage of the protective cover plate 30. The ring ears 32 are corrugated parts, and the two ends of the ring ears 32 are embedded in the protective cover plate 30.

[0058] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0059] In this embodiment of the utility model, the prefabricated channel achieves effective connection between sections by setting support steps 13 and overlapping inverted steps 14 at both ends of the U-shaped channel 10, ensuring a tight fit and effectively avoiding misalignment, cracking, and water-stopping damage during assembly. The joints of each U-shaped channel 10 section are constructed using a combined anti-seepage system consisting of joint surface sealing filler 21 and an internal waterstop 22, greatly improving the sealing and water-stopping effect of the joint surface. The channel wall 12 is equipped with lifting holes 16 and matching steel sleeves, facilitating construction and ensuring construction safety while enabling the installation of the concrete structure of the wall 12. The protection of the lifting holes 16 is to avoid local damage; the top opening of the channel is covered by a hidden protective cover plate 30, which can not only enhance the safety of the irrigation and drainage channel, but also significantly reduce the siltation of the bottom of the channel, which is conducive to later operation, management and maintenance; the wall 12 adopts a vertical flow surface and a gradually expanding retaining surface structure, which can ensure that the flow surface of each adjacent U-shaped channel 10 is always flat and straight after assembly, avoid uneven protrusions, and improve the flow state; the U-shaped channel 10 adopts an integral prefabricated thin-walled structure, which is safe, stable, economical and practical, simple in structure, and can be prefabricated on site or purchased as a prefabricated product in the factory.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A prefabricated channel, characterized in that, The prefabricated channel includes: several U-shaped channels (10), joint sealing components (20), and protective covers (30); The U-shaped channel (10) is a reinforced concrete U-shaped structure prefabricated as a whole, consisting of a base plate (11) and a wall (12); the two ends of the U-shaped channel (10) are respectively provided with supporting steps (13) and overlapping inverted steps (14), and the supporting steps (13) and overlapping inverted steps (14) are matched and spliced ​​with each other; the top inner side of the two side walls (12) is provided with sunken supporting slots (15); The joint sealing component (20) includes: sealing filler (21) and waterstop strip (22); The inner wall of the joint between the supporting step (13) and the overlapping step (14) is provided with a concave groove. The middle of the inner wall of the lower step of the supporting step (13) is provided with a concave water-stop groove. The overlapping step (14) and the water-stop groove are matched at a plane. The sealing filler (21) is filled in the groove. The water-stop strip (22) is installed in the water-stop groove. The protective cover (30) is installed in the support groove (15).

2. The prefabricated channel as described in claim 1, characterized in that, The base plate (11) is a flat base plate with a uniform thickness section, and the plate thickness h is 0.13m to 0.20m. A 0.10m thick C15 plain concrete cushion layer (17) is provided at the bottom.

3. The prefabricated channel as described in claim 1, characterized in that, The wall body (12) adopts a variable cross-section side wall structure with varying thickness. The wall height H is 0.60m to 1.50m. The flow surface is vertical and is connected to the bottom plate (11) with a reverse arc. The arc radius R is 0.08m to 0.10m. The retaining surface gradually expands from the top to the bottom plate. The net width B of the top of the wall (12) is 0.40m to 1.20m, and the thickness b of the top of the wall is 0.13m to 0.15m, and they are arranged symmetrically.

4. The prefabricated channel as described in claim 1, characterized in that, The support groove (15) has a groove width b1 of 0.11m and a groove depth h1 of 0.09m.

5. The prefabricated channel as described in claim 1, characterized in that, The wall (12) has multiple hoisting holes (16) at the same height, and the number of hoisting holes (16) on a single U-shaped channel (10) is not less than four; a steel sleeve is embedded in the hoisting hole (16).

6. The prefabricated channel as described in claim 5, characterized in that, The U-shaped channel (10) is made of a steel mesh composed of HRB400 grade steel bars arranged in a single layer in both directions, with a steel bar diameter of 10mm-14mm; the hoisting hole (16) passes through the mesh of the steel mesh through the wall (12).

7. The prefabricated channel as described in claim 1, characterized in that, The sealing filler (21) inside the groove of the seam is made of polysulfide sealant, with an embedding depth t of 15mm-25mm and a width w of 20mm-40mm; the waterstop (22) is made of water-swellable waterproof rubber strip with a strip width of 20mm-30mm and a thickness of 10mm-20mm.

8. The prefabricated channel as described in claim 1, characterized in that, The concrete strength grade of the U-shaped channel (10) is not lower than C35.

9. The prefabricated channel as described in claim 1, characterized in that, The protective cover plate (30) is a precast reinforced concrete slab with a concrete strength grade of not less than C30 and a slab thickness of 0.08m. The protective cover plate (30) is made of HPB300 grade steel bars arranged in a single layer in the longitudinal and transverse directions, with a steel bar diameter of 8mm to 10mm.

10. The prefabricated channel as described in claim 1, characterized in that, The top surface of the protective cover plate (30) is provided with multiple ring ear grooves (31), and a ring ear (32) is provided in the ring ear groove (31). The top height of the ring ear (32) is lower than the top surface height of the protective cover plate (30). The ring ear (32) is a wave-shaped part, and the two ends of the ring ear (32) are embedded in the protective cover plate (30).

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