An assembled recycled waterproof concrete drainage ditch mechanism, manufacturing method and application

Abstract

The application provides an assembled recycled waterproof concrete drainage channel mechanism, the drainage channel mechanism is in an open groove structure, and the drainage channel mechanism comprises a plurality of plate layer units from top to bottom; the plate layer units are sequentially provided with a first plate layer and a second plate layer from top to bottom; a first impermeable layer is arranged between the first plate layer and the second plate layer; a plurality of connecting grooves are arranged on the two ends of the first plate layer along the channel direction; and a plurality of first bolt holes are arranged on the second plate layer below the connecting grooves. The application has less field wet work, can reserve channel joints, improves construction efficiency, solves the disposal problem of waste concrete, saves sand and stone resources, and achieves the purposes of resource recycling and environmental protection under the premise of ensuring construction quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of farmland channel, in particular to a prefabricated recycled waterproof concrete drainage channel mechanism, manufacturing method and application. BACKGROUND

[0002] At present, new rural construction occupies a very important position in the social modernization construction. In the new rural construction, the demolition of old buildings is an indispensable part. In the demolition work, the treatment of construction waste such as waste concrete is mainly by stacking and landfill. Such a large amount of waste concrete not only occupies valuable land resources, but also causes a series of social problems such as environmental protection and ecology. Correspondingly, the continuous exploitation of a large amount of natural sand and gravel aggregate leads to the depletion of sand and gravel resources in some areas. The sand and gravel aggregate and other materials need to be transported over a long distance, which increases the cost and also pollutes the environment. Recycling and recycling of a large amount of waste concrete, i.e. recycled concrete technology, is currently considered an effective measure to solve the problem of waste concrete disposal. Waste concrete can be obtained by crushing, washing, grading and mixing according to a certain proportion to prepare recycled aggregate waterproof concrete, which solves the problem of waste concrete disposal, saves sand and gravel resources, and achieves the purpose of resource recycling and environmental protection under the premise of ensuring construction quality.

[0003] In the new rural construction, modern agricultural production cannot be separated from scientific and effective water conservancy construction. Water is an indispensable element for crop growth. The vertical and horizontal ditches in farmland not only ensure the source of irrigation water for crops in farmland, but also have the function of drainage and flood discharge. Water channels play an important role in agricultural production. In the current engineering practice, the drainage channel usually adopts cast-in-place waterproof concrete groove type channel structure, which has the disadvantages of large amount of site wet work, which leads to difficult to guarantee the construction quality, serious fracture of cast-in-place waterproof concrete channel, separation and deformation of slab connecting points, and long construction period. The commonly used prefabricated drainage channel is mainly a slot body butt joint channel, which has the disadvantages of many types of parts constituting the water channel, complex assembly, low construction efficiency, easy breakage and leakage of the side slope plates, and high maintenance difficulty. SUMMARY

[0004] In view of the above-mentioned disadvantages of the prior art, the present application aims to provide a prefabricated recycled waterproof concrete drainage channel mechanism, manufacturing method and application, which solves the problems of large amount of site wet work in the prior art, which leads to difficult to guarantee the construction quality, serious fracture of cast-in-place waterproof concrete channel, separation and deformation of slab connecting points, long construction period, many types of parts constituting the water channel, complex assembly, low construction efficiency, easy breakage and leakage of the side slope plates, and high maintenance difficulty.

[0005] In order to achieve the above object and other related objects, the present application provides a kind of prefabricated recycled waterproof concrete drainage ditch mechanism in one aspect, the drainage ditch mechanism is open groove structure, the drainage ditch mechanism includes several plate layer units from top to bottom, the plate layer unit is sequentially provided with first plate layer and second plate layer from top to bottom, first impermeable layer is arranged between the first plate layer and the second plate layer, a plurality of connecting grooves are arranged on the two ends of the first plate layer along the channel direction, a plurality of first bolt holes are arranged on the second plate layer below the connecting grooves.

[0006] Preferably, the drainage ditch mechanism is provided with a post-cast strip, which is formed by the first plate layer being recessed along the channel direction relative to the second plate layer.

[0007] More preferably, the drainage ditch mechanism is open trapezoidal groove structure, the first bolt hole penetrates the second plate layer and the first impermeable layer.

[0008] More preferably, the thickness of the first plate layer and the second plate layer can be 100-200mm, and the length of the first plate layer and the second plate layer along the channel direction can be 2000-3000mm.

[0009] More preferably, the connecting groove is circular arc shape.

[0010] Preferably, the material of the first impermeable layer is 1-2mm thick SBC waterproof roll material.

[0011] More preferably, the material of the impermeable layer is 1.5mm thick SBC waterproof roll material, which is a kind of waterproof material with excellent performance, made of styrene-butadiene-styrene (SBS) rubber modified asphalt coating, glass fiber felt, polyester felt and glass fiber reinforced polyester felt as the base, and covered with isolation material on both sides, with the advantages of heat resistance, cold resistance, corrosion resistance, aging resistance, good thermoplasticity, high tensile strength, high elongation and strong tear resistance.

[0012] Preferably, steel mesh is arranged in the first plate layer and the second plate layer.

[0013] Preferably, the slot of the connecting groove is recessed inward relative to the end face of the first plate layer, and the adjacent connecting grooves are kept apart, and a plurality of steel mesh overhanging sections are arranged on the slot.

[0014] Preferably, the plate layer unit extends outward along the two ends perpendicular to the channel direction, and the outward extending part is provided with a fixing component.

[0015] More preferably, the plate layer unit extends outward along the two ends perpendicular to the channel direction, and the length of the outward extending part is 350mm, and the steel bars of the outward extending part are subjected to rust-proof treatment.

[0016] The second aspect of the application provides a manufacturing method for the prefabricated recycled waterproof concrete drainage ditch mechanism, comprising the following steps:

[0017] 1) After setting the reinforcement net, the recycled waterproof concrete is used for casting and forming to provide a first plate layer;

[0018] 2) After laying the first impermeable layer on the first plate layer, the recycled waterproof concrete is used for casting and forming after setting the reinforcement net to provide a second plate layer;

[0019] 3) A plurality of connecting grooves are arranged on the two ends of the second plate layer along the channel direction, and a plurality of first bolt holes penetrating the first impermeable layer are arranged on the second plate layer below the connecting grooves.

[0020] Preferably, the recycled waterproof concrete cast in the first plate layer and the second plate layer is recycled coarse aggregate waterproof concrete with a strength grade of RC25 or below prepared by recycled coarse aggregate, and the recycled coarse aggregate replacement rate is 50%-100%. The mixing ratio of the recycled waterproof concrete comprises the following components by weight: cement 250-280 parts; fly ash 60-70 parts; water 125-130 parts; sand 600-715 parts; natural coarse aggregate 595-605 parts; recycled coarse aggregate 595-1200 parts; water reducing agent 3-4 parts; waterproof agent 0.1-0.2 parts.

[0021] More preferably, the cement is 256 parts; the fly ash is 64 parts; the water is 128 parts; the sand is 709 parts; the natural coarse aggregate is 600 parts; the recycled coarse aggregate is 600 parts; the water reducing agent is 3.2 parts; and the waterproof agent is 0.16 parts.

[0022] The recycled waterproof concrete is prepared according to the Technical Specification for Application of Recycled Waterproof Concrete (DG / TJ08-2018), the recycled coarse aggregate is type II recycled coarse aggregate, the recycled coarse aggregate is prepared by crushing, washing, grading and mixing according to a certain proportion from the waste concrete after the demolition operation in the new rural construction, the waste concrete is crushed by using a jaw crusher, and the recycled coarse aggregate is screened after crushing with a continuous particle size of 5-40 mm.

[0023] More preferably, the cement is PO42.5 portland cement.

[0024] More preferably, the fly ash is grade I fly ash, and the quality of the fly ash should meet the requirements in the Fly Ash for Use in Cement and Waterproof Concrete (GB / T 1596-2017).

[0025] More preferably, the sand is natural sand.

[0026] More preferably, the water reducing agent is a polycarboxylic acid water reducing agent.

[0027] The waterproof agent is triethanolamine waterproof agent, which can increase cement hydration products, and make cement stone crystallization fine, so that the waterproof concrete is more dense, and the impermeability of the channel body is improved.

[0028] The third aspect of the present application provides a prefabricated recycled waterproof concrete channel, comprising a plurality of the drainage channel mechanisms.

[0029] Preferably, a fixing plate is arranged between adjacent drainage channel mechanisms, the fixing plate is arranged in the corresponding connecting groove of the adjacent drainage channel mechanisms and covers the first bolt hole below the connecting groove, the fixing plate is provided with a second bolt hole corresponding to the first bolt hole, and the fixing plate is provided with a second impermeable layer.

[0030] The fourth aspect of the present application provides a manufacturing method of a prefabricated recycled waterproof concrete channel, a plurality of drainage channel mechanisms manufactured by the above method are connected in sequence along the channel direction, and adjacent drainage channel mechanisms are connected through the first bolt hole below the corresponding connecting groove and the fixing plate to realize splicing.

[0031] As described above, the prefabricated recycled waterproof concrete drainage channel mechanism, the manufacturing method and the application have the following beneficial effects: the prefabricated recycled waterproof concrete drainage channel designed by the present application uses waste concrete to replace part of natural coarse aggregate after crushing and screening, and prepares recycled waterproof concrete for channel unit prefabrication, and connects with equal-strength waterproof concrete, which has less wet work on site, can reserve channel joints, improves construction efficiency, solves the disposal problem of waste waterproof concrete, saves sand and stone resources, and achieves the purpose of resource recycling and environmental protection under the premise of ensuring construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A transverse sectional view of the prefabricated recycled waterproof concrete drainage channel mechanism of the present application is shown.

[0033] Figure 2 A bottom surface schematic view of the prefabricated recycled waterproof concrete drainage channel mechanism of the present application is shown.

[0034] Figure 3 A connecting groove structure schematic view of the prefabricated recycled waterproof concrete drainage channel mechanism of the present application is shown.

[0035] Figure 4 A top view of the connecting part of the prefabricated recycled waterproof concrete drainage channel mechanism of the present application is shown.

[0036] Figure 5 A longitudinal sectional view of the connecting part of the prefabricated recycled waterproof concrete drainage channel mechanism of the present application is shown.

[0037] Figure 6It is a fixed component schematic diagram of the assembled recycled waterproof concrete drainage channel mechanism of the application.

[0038] Reference signs

[0039] 1 first plate layer

[0040] 2 second plate layer

[0041] 3 first impermeable layer

[0042] 4 connecting groove

[0043] 5 first bolt hole

[0044] 6 steel bar mesh overhanging section

[0045] 7 fixed component

[0046] 8 fixed plate component

[0047] 9 second bolt hole

[0048] 10 post-pouring belt DETAILED DESCRIPTION

[0049] The embodiments of the application are described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the application from the disclosure of the specification. The application can also be implemented or applied by other different embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the application.

[0050] Example 1

[0051] An assembled recycled waterproof concrete drainage channel mechanism, the drainage channel mechanism is in an open groove structure, the drainage channel mechanism comprises a plurality of plate layer units from top to bottom, the plate layer units are sequentially provided with a first plate layer 1 and a second plate layer 2 from top to bottom, a first impermeable layer 3 is arranged between the first plate layer 1 and the second plate layer 2, a plurality of connecting grooves 4 are arranged on both ends of the first plate layer 1 along the channel direction, a plurality of first bolt holes 5 are arranged on the second plate layer 2 below the connecting grooves 4, the drainage channel mechanism is provided with a post-pouring belt 10, and the post-pouring belt 10 is formed by the first plate layer 1 being recessed along the channel direction relative to the second plate layer 2.

[0052] The drainage channel mechanism is in an open trapezoidal groove structure, the first bolt hole 5 penetrates the second plate layer 2 and the first impermeable layer 3, the first bolt hole 5 is arranged in two groups, the first bolt hole 5 is reserved at a position 50 mm away from the edge of the second plate layer 2 below the connecting groove 4, the center distance of the two first bolt holes 5 is 100 mm, and the first bolt hole 5 groups are arranged with an equal interval of 450 mm along the channel unit transversely.

[0053] The thickness of the first plate layer 1 and the second plate layer 2 can be 100mm-200mm, and the length of the first plate layer 1 and the second plate layer 2 along the channel direction can be 2000-3000mm.

[0054] The connecting groove 4 is an arc-shaped connecting groove 4.

[0055] The seepage-proof layer material is a 1-2mm thick SBC waterproof membrane.

[0056] The seepage-proof layer material is a 1.5mm thick SBC waterproof membrane. The SBC waterproof membrane conforms to the standard GB18242-2008. It is a high-performance waterproof material made of styrene-butadiene-styrene (SBS) rubber modified bitumen as the coating, fiberglass felt, polyester felt, and fiberglass reinforced polyester felt as the base, and both sides are covered with isolation material. It has the advantages of heat resistance, cold resistance, corrosion resistance, aging resistance, good thermoplasticity, high tensile strength, high elongation, and strong tear resistance.

[0057] The first slab layer 1 and the second slab layer 2 are provided with steel mesh.

[0058] The groove of the connecting groove 4 is recessed inward relative to the end face of the first plate layer 1, and there is a gap between adjacent connecting grooves 4. Multiple steel mesh extension sections 6 are provided on the groove.

[0059] The plate unit extends outward at both ends perpendicular to the channel direction, and the outwardly extended portion is provided with fixing components 7.

[0060] The plate unit extends outward by 350mm from both ends perpendicular to the channel direction, and the reinforcing bars of the extended section are treated with rust prevention.

[0061] Example 2

[0062] The drainage ditch project of a high-standard farmland construction demonstration project includes two parts: branch canals and distribution canals. The total length of the drainage ditch is 51 km, with 4 branch canals and 12 distribution canals arranged in the entire canal system. The total length of the branch canals is 8.93 km, and the total length of the distribution canals is 8.38 km; there are 93 farm canals with a total length of 33.6 km. According to the drainage system engineering layout and relevant standards, the depth and spacing of the field drainage ditches were determined, and the flow rate, water level, cross-sectional dimensions, and engineering volume of each level of drainage channel and structure were analyzed and calculated. The spacing and cross-sectional dimensions of the field drainage network ditches were determined by drainage requirements and mechanized farming requirements.

[0063] The water depth and bottom width of drainage ditches are designed based on farmland irrigation water consumption. In a certain year, the actual irrigated paddy fields in the irrigation district were 41,000 hectares. 2 Irrigation quota 14340m 3 / hm 2 Water consumption was 587.94 million cubic meters. 3Trial method, that is, first determine the water depth and bottom width of the channel section according to the requirements of drainage and irrigation.

[0064] Taking a branch channel as an example, the channel design gradient is 1 / 7000, the channel slope coefficient is 2, the channel depth is 2.1 m, and the initial selected cross-sectional size is a channel bottom width of 3 m and a channel water depth of 1.65 m. When the channel is used for water diversion and irrigation, the water level often forms an inverted slope or a flat slope, which requires the water surface curve of the drainage channel during water diversion and irrigation to be calculated according to the non-uniform flow formula, so as to check whether the drainage channel can meet the requirements of water diversion and irrigation in terms of water conveying distance and flow velocity, etc. If not, the water conservancy elements of the drainage ditch should be adjusted. The channel cross section is designed according to the Design Standard for Irrigation and Drainage Engineering (GB50288-2018). After the initial selection of the channel cross-sectional size, the drainage modulus is determined, the drainage mode of farmland and the rainstorm return period are combined with the local recent measured data to obtain the drainage modulus of 0.528 m 3 / (s·km 2 ). The channel drainage area is 8.67 km 2 , and the drainage flow is calculated as follows:

[0065] Q 排 =A 排 q 排 =8.67×0.528=4.6m 3 / s

[0066] Finally, the cross-sectional flow of the drainage channel is checked. According to the design parameters of the cross section, the design flow and the drainage flow are compared. The cross-sectional area of the branch channel is 10.39 m 2 , the wet perimeter length is 10.38 m, the hydraulic radius is 1 m, and the Chezy coefficient is 40.01. Substituting into the design flow calculation formula:

[0067]

[0068] The flow check meets the requirements.

[0069] According to the above invention, the design strength of the recycled waterproof concrete for pouring is RC25, and the mixture ratio is as follows: cement 278 parts, fly ash 70 parts, water 128 parts, sand 660 parts, recycled coarse aggregate 1200 parts, water reducing agent 3.5 parts, and waterproof agent 0.17 parts by weight.

[0070] Specifically, the cement is PO42.5 portland cement; the fly ash is I-class fly ash; the sand is natural sand; the water reducing agent is polycarboxylic acid water reducing agent; the waterproof agent is triethanolamine waterproof agent; and the recycled coarse aggregate is selected to have a continuous particle size of 5-40 mm and a replacement rate of 100%.

[0071] An assembly method of the prefabricated recycled waterproof concrete channel is as follows: a fixing plate 8 is arranged between adjacent drainage channel structures, the fixing plate 8 is arranged in a corresponding connecting groove 4 of the adjacent drainage channel structures and covers a first bolt hole 5 below the connecting groove 4, a second impermeable layer is arranged on the fixing plate 8, the fixing part 7 is 200mm*200mm*10mm in size, four first bolt holes 5 are reserved, the center distance of the first bolt holes 5 is 100mm, and the distance from the edge of the fixing part 7 is 50mm.

[0072] Table 1 Comparison of waterproof concrete mixing ratio parameters

[0073]

[0074] Water-cement ratio = mass of water / mass of cement;

[0075] Sand ratio = mass of sand / (mass of sand + mass of natural coarse aggregate + mass of recycled coarse aggregate);

[0076] Recycled coarse aggregate replacement rate = mass of recycled coarse aggregate / (mass of recycled coarse aggregate + mass of natural coarse aggregate);

[0077] Fly ash content = mass of fly ash / (mass of fly ash + mass of cement).

[0078] As shown in Table 1, comparing the comparative example 1 and the example 2, the RC25 recycled waterproof concrete in the example 2 increases the replacement rate of the recycled coarse aggregate from 50% to 100%, and at the same time, the water-cement ratio is reduced from 0.50 to 0.46 to ensure the strength of the waterproof concrete. Under the condition of ensuring the design strength, the replacement rate of the recycled waterproof concrete is increased, and the upper limit of the replacement rate is met, the utilization rate of the recycled aggregate is improved, the disposal problem of the construction waste in the new rural construction is better solved, the purpose of resource recycling and environmental protection is achieved, and it can be considered as a beneficial measure.

[0079] The above examples are intended to illustrate the disclosed embodiments of the present application and should not be construed as limiting the present application. In addition, various modifications listed herein and changes in the method and composition of the application are obvious to those skilled in the art without departing from the scope and spirit of the present application. Although the present application has been specifically described in conjunction with various preferred embodiments thereof, it should be understood that the present application is not limited to these specific embodiments. In fact, various modifications such as those described above to obtain the application that are obvious to those skilled in the art should be included within the scope of the present application.

Claims

1. A modular regenerating waterproof concrete drainage channel structure, characterized in that, The drainage channel mechanism is in an open groove structure, and comprises a plurality of plate layer units from top to bottom. The plate layer units are sequentially provided with a first plate layer (1) and a second plate layer (2) from top to bottom. A first impermeable layer (3) is arranged between the first plate layer (1) and the second plate layer (2). A plurality of connecting grooves (4) are arranged on the two ends of the first plate layer (1) along the channel direction. A plurality of first bolt holes (5) are arranged on the second plate layer (2) below the connecting grooves (4). The drainage channel mechanism is provided with a post-pouring belt (10) which is formed by the first plate layer (1) being recessed relative to the second plate layer (2) along the channel direction. Steel mesh is arranged in the first plate layer (1) and the second plate layer (2). The slot of the connecting groove (4) is recessed inward relative to the end face of the first plate layer (1), and the adjacent connecting grooves (4) are kept apart. A plurality of steel mesh outward extending sections (6) are arranged on the slot. A fixing plate (8) is arranged between adjacent drainage channel mechanisms, and is arranged in the corresponding connecting grooves (4) of the adjacent drainage channel mechanisms and covers the first bolt holes (5) below the connecting grooves (4). The fixing plate (8) is provided with second bolt holes (9) corresponding to the first bolt holes (5), and is provided with a second impermeable layer.

2. The prefabricated recycled waterproof concrete drainage channel mechanism according to claim 1, characterized in that, The first impermeable layer is made of 1-2mm thick SBC waterproof roll material.

3. The prefabricated recycled waterproof concrete drainage channel mechanism according to claim 1, characterized in that, The plate layer unit extends outward along the two ends perpendicular to the channel direction, and the outward extending part is provided with a fixing part (7).

4. The manufacturing method of the assembled recycled waterproof concrete drainage channel mechanism according to any one of claims 1-3, comprising the following steps: 1) After arranging the steel mesh, recycled waterproof concrete is poured and formed to provide the first plate layer (1); 2) After laying the first impermeable layer (3) on the first plate layer (1), the steel mesh is arranged again, and the recycled waterproof concrete is poured and formed to provide the second plate layer (2); The recycled waterproof concrete poured in the first plate layer (1) and the second plate layer (2) is recycled coarse aggregate waterproof concrete with a recycled coarse aggregate replacement rate of 50%-100% and a strength grade of RC25 or below. The mixing ratio of the recycled waterproof concrete comprises the following components by weight: Cement 250-280 parts; Fly ash 60-70 parts; Water 125-130 parts; Sand 600-715 parts; Natural coarse aggregate 595-605 parts; Recycled coarse aggregate 595-1200 parts; Water reducing agent 3-4 parts; Waterproof agent 0.1-0.2 parts; 3) A plurality of connecting grooves (4) are arranged on the two ends of the second plate layer (2) along the channel direction. A plurality of first bolt holes (5) penetrating the first impermeable layer (3) are arranged on the second plate layer (2) below the connecting grooves (4).

5. A method of manufacturing a prefabricated recycled waterproof concrete channel, characterized by, A plurality of assembled recycled waterproof concrete drainage channel mechanisms according to any one of claims 1-3 are connected in sequence along the channel direction. Adjacent drainage channel mechanisms are connected through the first bolt holes (5) below the corresponding connecting grooves (4) and the fixing plate (8) to realize splicing.

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