Novel formwork system for prefabrication of fabricated steel concrete gutter inlet and construction method of novel formwork system

Abstract

The invention provides a novel formwork system for prefabricating an assembly type steel concrete gutter inlet, and relates to the technical field of steel concrete gutter inlet construction, the novel formwork system comprises a formwork base, a gutter inlet formwork assembly is arranged at the upper end of the formwork base, and a branch pipe preformed hole formwork assembly is arranged at the side end of the formwork base; the gutter inlet template assembly comprises a first template, a second template is arranged at one side end of the first template, and a third template is arranged at the other side end of the second template. The invention further provides a construction method of the novel formwork system for prefabricating the assembly type steel concrete gutter inlet. The modular steel formworks which can be recycled and assembled and spliced are adopted, the mounting precision is high, mounting and dismounting are easy and convenient, and the pouring requirements of gutter inlets of different sizes can be met.

Description

Technical Field

[0001] The invention relates to the technical field of steel concrete rainwater inlet construction, in particular to a novel template system for prefabrication of assembled steel concrete rainwater inlets and a construction method thereof. Background Art

[0002] Municipal engineering rainwater inlets are key facilities in urban drainage systems. Traditional processes mainly use brickwork or concrete modules for on-site manual masonry, which have problems such as poor overall stability, long on-site construction period, high dependence on labor, and easy leakage that causes road collapse. In recent years, cast-in-place reinforced concrete rainwater inlets have gradually become popular. Reinforced concrete rainwater inlets have high strength, good integrity, and good impermeability. However, the existing technology usually uses wooden formwork and wooden squares to support the formwork of cast-in-place rainwater inlets. Carpenters need to assemble the formwork on site according to the size of the rainwater design drawings. After the steel bar construction is completed, the formwork is supported and fixed. After the concrete pouring is completed, the wooden formwork and support are removed one by one. The existing technology has the following problems: 1. The wooden formwork cannot be installed or dismantled as a whole. The installation and disassembly process is cumbersome, the work efficiency is low, the construction period is affected, and a lot of labor costs are consumed.

[0003] 2. The wooden formwork suffers great loss during the assembly and disassembly process, and the number of times it can be recycled is limited, which easily leads to waste of resources.

[0004] 3. When the reserved hole position or hole size of the rainwater outlet branch pipe is adjusted, it is necessary to replace the wooden template and reopen the hole, which has poor randomness and flexibility.

[0005] 4. The size of the rainwater outlet is adapted to local conditions, and is usually designed with double or multiple grates. The size adjustment of the wooden template corresponding to rainwater outlets of different sizes is cumbersome. Whether the template can be modularized and spliced ​​is a problem that needs to be optimized at present.

[0006] 5. The outer formwork of the rainwater outlet needs to be equipped with diagonal braces to prevent the concrete from expanding. The use of wooden or steel pipe supports is cumbersome and increases labor costs. Summary of the invention

[0007] In view of the above-mentioned prior art, the present invention proposes a new formwork system and a construction method for the prefabrication of assembled steel concrete rainwater inlets. The prefabrication of the rainwater inlets adopts a modular steel formwork that can be recycled and assembled and spliced. It has high installation precision and is simple and convenient to install and disassemble. It can also meet the casting requirements of rainwater inlets of different sizes. The reserved holes of the rainwater inlet branch pipes can be randomly adjusted in position and changed in size. The addition of simple diagonal braces to the outer formwork reduces the risk of concrete expansion, which greatly improves the prefabrication quality and construction efficiency of the rainwater inlets.

[0008] The present invention provides a new template system for prefabrication of assembled reinforced concrete rainwater inlets, comprising a template base, a rainwater inlet template assembly being arranged at the upper end of the template base, and a branch pipe reserved hole template assembly being arranged at the side end of the template base; the rainwater inlet template assembly comprising a first template, a second template being arranged at one side end of the first template, and a third template being arranged at the other side end of the second template; the first template comprising a C-shaped first outer template, a C-shaped first inner template being arranged inside the first outer template; the second template comprising two opposite straight second outer templates, two opposite straight second inner templates being arranged inside the second outer template; the third template comprising a C-shaped third outer template, a C-shaped third inner template being arranged inside the third outer template; the opening end of the first outer template is arranged opposite to the opening end of the third outer template, the opening end of the first inner template is arranged opposite to the opening end of the third inner template, the second outer template is arranged between the flanges of the first outer template and the third outer template, and the second inner template is arranged between the flanges of the first inner template and the third inner template.

[0009] Preferably, a plurality of inner mold struts are arranged inside the first inner mold formwork, the second inner mold formwork and the third inner mold formwork, and inner mold connecting rods are arranged between the inner mold struts of the first inner mold formwork and the inner mold struts of the second inner mold formwork, and between the inner mold struts of the second inner mold formwork and the inner mold struts of the third inner mold formwork.

[0010] Preferably, inner formwork hanging beams are provided at the upper ends of the first inner formwork, the second inner formwork and the third inner formwork.

[0011] Preferably, a plurality of lifting holes are provided at the upper ends of the first template, the second template and the third template.

[0012] Preferably, the bottom of the template base and the backs of the first template, the second template and the third template are all provided with grid-like ribs.

[0013] Preferably, a plurality of diagonal bracing bases are provided at the lower end of the template base, and external diagonal bracing rods are provided between the two ends of the diagonal bracing bases and the rainwater inlet template assembly via bolts.

[0014] Preferably, the second template is at the same height as the third template and is higher than the first template.

[0015] Preferably, the top of one side of the adjacent second outer template and the second inner template is connected via a side baffle, and the height of the side baffle is consistent with the height difference between the first template and the second template.

[0016] The present invention also provides a construction method for the novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets, comprising the following steps: S1. Concrete pouring: pour the bottom slab concrete first and vibrate it to make it dense. When the bottom slab concrete is about to set, pour the side wall concrete and vibrate it to make it dense. S2, dismantle and lift out the first inner formwork, the second inner formwork, and the third inner formwork in sequence; S3, disassembling the first outer formwork, the second outer formwork, and the third outer formwork in sequence; S4. Remove the template assembly of the branch pipe reserved hole in the side wall of the rainwater inlet, cover it with geotextile and sprinkle water to keep it moist for no less than 7 days; S5. According to the size of the rainwater inlet, the foundation pit of the rainwater inlet is excavated at a certain distance on each side at the designed position of the road, and after excavation to the base, a plain concrete cushion layer is poured; S6. Use lifting equipment to hoist the rainwater inlet into the rainwater inlet foundation pit and extend the branch pipe into the branch pipe reserved hole. The outer edge of the branch pipe is flush with the inner wall of the rainwater inlet. The gap between the branch pipe and the branch pipe reserved hole is filled with micro-expansion concrete; S7. After the concrete filling the gaps between the branch pipes and the reserved holes of the branch pipes has been cured for a period of time, the foundation pit of the rainwater outlet is backfilled and compacted. At this point, the construction of the rainwater outlet is completed.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The template base, the rainwater inlet template assembly, and the branch pipe reserved hole template assembly in the present invention are all made of steel structures, which have great rigidity and strength, and the structural design is reasonable and reliable. The components are connected by bolts or connecting rods, and the assembly and disassembly are convenient and quick, which improves the construction production efficiency. The rainwater inlet template assembly can increase or reduce the splicing template as needed, and is flexibly applicable to the prefabrication of rainwater inlets of different sizes such as double grates or four grates.

[0018] 2. The present invention takes into account the risk of extruding the outer formwork assembly during concrete pouring, and for this purpose, a firm and reliable diagonal bracing device is designed on the formwork base, which is simple and quick for workers to operate and improves the pouring quality of the rainwater inlet.

[0019] 3. In the present invention, the inner formwork is placed on the outer formwork through the inner membrane hanging beam, and forms an integral structure with the outer formwork and the formwork base, which is stable and reliable, and then the overall one-time casting of the rainwater outlet can be realized, which greatly improves the molding quality of the rainwater outlet.

[0020] 4. The branch pipe reserved hole template assembly in the present invention is a plurality of steel cylinders of different diameters, which can realize random and flexible adjustment of the size of the reserved holes and the positions of the reserved holes of the rainwater inlet branch pipes.

[0021] 5. The steel concrete rainwater inlets made of assembled formwork in the present invention can be prefabricated in batches and maintained in advance. When the construction conditions are met on site, trenches can be dug and hoisted for installation. The required trench excavation work is reduced, which greatly shortens the construction period and reduces resource waste compared to brick-built or cast-in-place rainwater inlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a new formwork system for prefabricating assembled steel concrete rainwater inlets in an embodiment of the present invention.

[0023] Figure 2 It is a schematic cross-sectional structure diagram of a new formwork system for prefabricating assembled reinforced concrete rainwater inlets in an embodiment of the present invention.

[0024] In the figure, 101-the first outer formwork; 102-the second outer formwork; 103-the third outer formwork; 201-the first inner formwork; 202-the second inner formwork; 203-the third inner formwork; 204-the inner formwork brace; 205-the inner formwork connecting rod; 206-the inner formwork hanging beam; 3-the branch pipe reserved hole formwork assembly; 4-the side baffle; 501-the diagonal brace base; 502-the external diagonal brace rod; 6-the lifting hole; 7-the formwork base. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0026] Example: Figure 1-Figure 2 A new type of template system for prefabrication of assembled steel concrete rainwater inlets is shown, comprising a template base 7, the upper end of which is fixed with a rainwater inlet template assembly by bolts. The rainwater inlet template assembly comprises a first template, one side end of the first template is connected with a second template by bolts, the other side end of the second template is connected with a third template by bolts, the second template is at the same height as the third template and is higher than the first template. The bottom of the template base 7 and the backs of the first template, the second template and the third template are all provided with grid-like ribs.

[0027] Furthermore, the first template includes a C-shaped first outer template 101, and a C-shaped first inner template 201 is arranged inside the first outer template 101; the second template includes two opposite straight second outer templates 102, and two opposite straight second inner templates 202 are arranged inside the second outer template 102; the third template includes a C-shaped third outer template 103, and a C-shaped third inner template 203 is arranged inside the third outer template 103; the opening end of the first outer template 101 is arranged opposite to the opening end of the third outer template 103, the opening end of the first inner template 201 is arranged opposite to the opening end of the third inner template 203, the second outer template 102 is placed between the flanges of the first outer template 101 and the third outer template 103, and the second inner template 202 is placed between the flanges of the first inner template 201 and the third inner template 203.

[0028] Furthermore, a plurality of inner mold braces 204 are arranged inside the first inner mold plate 201, the second inner mold plate 202, and the third inner mold plate 203, and inner mold connecting rods 205 are arranged by bolts between the inner mold braces 204 of the first inner mold plate 201 and the inner mold braces 204 of the second inner mold plate 202, and between the inner mold braces 204 of the second inner mold plate 202 and the inner mold braces 204 of the third inner mold plate 203. The inner mold braces 204 are made of angle steel, and the angle steel is provided with a pin hole on the plane, so that the inner mold braces 204 can be connected and fixed by the inner mold connecting rods 205 and the pins; the inner mold connecting rods 205 are welded into an "X" shape by four steel pipes, and grooves and pin holes are opened at the ends of the steel pipes to facilitate fixing with the inner mold braces 204.

[0029] Furthermore, the upper ends of the first inner form 201, the second inner form 202, and the third inner form 203 are provided with inner form hanging beams 206, and the inner form hanging beams 206 are connected to the adjacent outer form by bolts. The inner form hanging beams 206 are made of angle steel, and bolt holes are provided on the plane at the ends of the angle steel so as to be bolted to the first outer form 101, the second outer form 102, and the third outer form 103.

[0030] Furthermore, the upper ends of the first outer formwork 101 , the second outer formwork 102 , the third outer formwork 103 , the first inner formwork 201 , the second inner formwork 202 , and the third inner formwork 203 are provided with hoisting holes 6 for easy hoisting and installation.

[0031] Furthermore, two diagonal support bases 501 are provided at the lower end of the template base 7, and external diagonal support rods 502 are provided between the two ends of the diagonal support base 501 and the rainwater inlet template assembly through bolts.

[0032] Furthermore, the top of one side of the adjacent second outer template 102 and the second inner template 202 is connected by a side baffle 4, and the height of the side baffle 4 is consistent with the height difference between the first template and the second template. The side baffle 4 is made of steel plate, and bolt holes are opened at the four corners to facilitate bolt connection with the side of the second outer template 102 and the second inner template 202.

[0033] Furthermore, a branch pipe reserved hole template assembly 3 is provided at the side end of the template base 7, which includes steel cylinders of different diameters. A steel structure skeleton is provided inside the steel cylinder, and the height is consistent with the thickness of the rainwater inlet wall.

[0034] Furthermore, the materials of the template base 7, the rainwater inlet template assembly, the branch pipe reserved hole template assembly 3 and the side baffle plate 4 are all steel. By using the above materials, it has the advantages of high structural rigidity, long service life, and easy demoulding. Before pouring concrete, an isolation agent can be applied on the surface of the template base 7, the rainwater inlet template assembly, the branch pipe reserved hole template assembly 3 and the side baffle plate 4 to facilitate demoulding and achieve better structural forming effects.

[0035] The construction method of the novel formwork system for prefabricating assembled steel concrete rainwater inlets is characterized by comprising the following steps: S1, concrete pouring, first pour the bottom slab concrete and vibrate it to make it dense, and then pour the side wall concrete and vibrate it to make it dense before the bottom slab concrete is about to set; when the concrete strength reaches the design requirements, loosen the bolts connecting the rainwater inlet formwork assembly and the external diagonal brace 502, and remove the external diagonal brace 502; S2, loosen the bolts connecting the inner mold hanging beams 206 to the first outer mold plate 101, the second outer mold plate 102, and the third outer mold plate 103, loosen the bolts connecting the second outer mold plate 102, the second inner mold plate 202 to the side baffle plate 4, pull out the pins fixing the inner mold connecting rod 205 to the inner mold supporting 204 and remove the inner mold connecting rod 205, and disassemble and lift the first inner mold plate 201, the second inner mold plate 202, and the third inner mold plate 203 in sequence; S3, loosen the bolts connecting and fixing the first outer template 101 and the second outer template 102, and the bolts connecting and fixing the second outer template 102 and the third outer template 103, and loosen the bolts connecting and fixing the first outer template 101, the second outer template 102, and the third outer template 103 to the template base 7 in turn, and disassemble the first outer template 101, the second outer template 102, and the third outer template 103 in turn; S4. Remove the branch pipe reserved hole template assembly 3 in the side wall of the rainwater inlet, cover it with geotextile and sprinkle water to keep it moist for no less than 7 days; S5. According to the size of the rainwater inlet, the foundation pit of the rainwater inlet is excavated at the designed position of the road with an extension of 10 cm on each side. After excavation to the base, a 10 cm thick plain concrete cushion layer is poured; S6. Use lifting equipment to hoist the rainwater inlet into the rainwater inlet foundation pit and extend the branch pipe into the branch pipe reserved hole. The outer edge of the branch pipe is flush with the inner wall of the rainwater inlet. The gap between the branch pipe and the branch pipe reserved hole is filled with micro-expansion concrete; S7. After the concrete filling the gaps between the branch pipes and the reserved holes of the branch pipes has been cured for 7 days, the foundation pit of the rainwater inlet is backfilled and compacted. At this point, the construction of the rainwater inlet is completed.

[0036] The components of the prefabricated formwork in this embodiment are connected by bolts or connecting rods, which makes assembly and disassembly convenient and quick, thereby improving construction production efficiency. The rainwater inlet formwork assembly can increase or reduce the number of splicing formworks as needed, and is flexibly applicable to the prefabrication of rainwater inlets of different sizes, such as double-grate or four-grate.

[0037] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent schemes made using the contents of the present invention specification, directly or indirectly applied in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. A new formwork system for prefabrication of assembled reinforced concrete rainwater inlets, characterized in that: It includes a template base, the upper end of which is provided with a rainwater inlet template assembly, and the side end of the template base is provided with a branch pipe reserved hole template assembly; the rainwater inlet template assembly includes a first template, one side end of the first template is provided with a second template, and the other side end of the second template is provided with a third template; the first template includes a C-shaped first outer template, and a C-shaped first inner template is provided inside the first outer template; the second template includes two opposite straight second outer templates, and two opposite straight second inner templates are provided inside the second outer template; the third template includes a C-shaped third outer template, and a C-shaped third inner template is provided inside the third outer template; the opening end of the first outer template is arranged opposite to the opening end of the third outer template, the opening end of the first inner template is arranged opposite to the opening end of the third inner template, the second outer template is placed between the flanges of the first outer template and the third outer template, and the second inner template is placed between the flanges of the first inner template and the third inner template.

2. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 is characterized in that: A plurality of inner mold supports are arranged inside the first inner mold formwork, the second inner mold formwork and the third inner mold formwork, and inner mold connecting rods are arranged between the inner mold supports of the first inner mold formwork and the inner mold supports of the second inner mold formwork, and between the inner mold supports of the second inner mold formwork and the inner mold supports of the third inner mold formwork.

3. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 or 2, characterized in that: Inner formwork hanging beams are arranged at the upper ends of the first inner formwork, the second inner formwork and the third inner formwork.

4. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 or 2, characterized in that: A plurality of hoisting holes are arranged at the upper ends of the first template, the second template and the third template.

5. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 or 2, characterized in that: The bottom of the template base and the backs of the first template, the second template and the third template are all provided with grid-shaped ribs.

6. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 or 2, characterized in that: A plurality of diagonal bracing bases are arranged at the lower end of the template base, and external diagonal bracing rods are arranged between the two ends of the diagonal bracing base and the rainwater inlet template assembly through bolts.

7. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 1 or 2, characterized in that: The second template is at the same height as the third template and is higher than the first template.

8. The novel formwork system for prefabrication of assembled reinforced concrete rainwater inlets as claimed in claim 7 is characterized in that: The top of one side of the adjacent second outer template is connected to the second inner template via a side baffle, and the height of the side baffle is consistent with the height difference between the first template and the second template.

9. The construction method of the new formwork system for prefabrication of assembled reinforced concrete rainwater inlets according to any one of claims 1 to 8, characterized in that: The steps include: S1. Concrete pouring: pour the bottom slab concrete first and vibrate it to make it dense. When the bottom slab concrete is about to set, pour the side wall concrete and vibrate it to make it dense. S2, dismantle and lift out the first inner formwork, the second inner formwork, and the third inner formwork in sequence; S3, disassembling the first outer formwork, the second outer formwork, and the third outer formwork in sequence; S4. Remove the template assembly of the branch pipe reserved hole in the side wall of the rainwater inlet, cover it with geotextile and sprinkle water to keep it moist for no less than 7 days; S5. According to the size of the rainwater inlet, the foundation pit of the rainwater inlet is excavated at a certain distance on each side at the designed position of the road, and after excavation to the base, a plain concrete cushion layer is poured; S6. Use lifting equipment to hoist the rainwater inlet into the rainwater inlet foundation pit and extend the branch pipe into the branch pipe reserved hole. The outer edge of the branch pipe is flush with the inner wall of the rainwater inlet. The gap between the branch pipe and the branch pipe reserved hole is filled with micro-expansion concrete; S7. After the concrete filling the gaps between the branch pipes and the reserved holes of the branch pipes has been cured for a period of time, the foundation pit of the rainwater outlet is backfilled and compacted. At this point, the construction of the rainwater outlet is completed.

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