Large-gradient concrete construction method and device for squat silo dome

Abstract

The invention discloses a steep-slope concrete construction method and device for a squat silo dome, and relates to the technical field of concrete pouring, and the steep-slope concrete construction device comprises a pouring assembly and an anti-blocking assembly; the pouring assembly comprises a concrete conveying pipe. The anti-blocking assembly comprises an anti-blocking cylinder, a pulling net, an air bag and an air pump. The multiple air bags and the multiple air pumps are in one-to-one correspondence, and the multiple air bags are annularly fixed in the anti-blocking cylinder. The upper end of the pulling net is fixed in the anti-blocking cylinder, and the lower end of the pulling net is fixed on the inner rings of the air bags; the air pump is fixed outside the anti-blocking cylinder and is communicated with the air bag; the pulling net can be driven to deform through periodic inflation and deflation of the air bag, and aggregate clamping stagnation in the anti-blocking cylinder can be automatically removed; the traditional operation of manually shaking the funnel is replaced, the labor intensity of workers is reduced, the pouring interruption risk caused by misoperation is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of concrete pouring technology, and in particular to a method and apparatus for constructing a shallow circular dome with a large slope of concrete. Background Technology

[0002] Shallow round silos, as a type of grain storage facility with high bulk density, large unit storage capacity, and low cost per ton of grain, have become a key infrastructure for the national food security strategy. Especially against the backdrop of frequent global conflicts and an escalating climate crisis, the demand for grain reserves is increasing, while urbanization is leading to a shortage of land resources, further highlighting the advantages of shallow round silos.

[0003] During the pouring process of shallow circular silos, the lower end of the existing concrete pouring port is aligned with the position to be poured. When concrete blocks the funnel, workers need to continuously lift the device and shake the funnel up and down to restore the flow of concrete, which makes the pouring process troublesome.

[0004] Furthermore, shallow circular silo dome structures typically have a steep slope, which can easily lead to cracks and appearance quality problems during concrete construction due to discontinuous pouring, insufficient compaction, or inadequate curing, seriously affecting the silo's sealing and grain storage performance.

[0005] The steep slope of the roof causes concrete to flow downwards during pouring, making it difficult to maintain a uniform thickness. Construction workers, fearing concrete slippage, are hesitant to fully vibrate the concrete, leading to quality problems such as honeycombing, pitting, and loose bottom surfaces. Resource waste and safety risks are also a concern: concrete falling during vibration not only wastes materials but also increases safety hazards due to working at heights. Furthermore, the steel truss support system bears significant instantaneous loads during concrete pouring, making it prone to deformation and accidents. Summary of the Invention

[0006] This application provides a method and apparatus for constructing shallow circular dome concrete with a large slope. It solves the problem in the prior art where workers need to constantly lift and shake the funnel up and down to restore its flow when encountering concrete blockage, making the pouring process cumbersome. The method achieves automatic removal of aggregate blockage in the anti-blockage cylinder by periodically inflating and deflating the air bladder to drive the deformation of the tension net. This replaces the traditional manual shaking of the funnel, reduces the labor intensity of workers, lowers the risk of pouring interruption due to improper operation, and improves construction efficiency.

[0007] This application provides a shallow circular dome with a steeply sloping concrete construction device, including a pouring component and an anti-blocking component;

[0008] The pouring assembly includes a concrete delivery pipe, and the anti-clogging assembly includes an anti-clogging cylinder, a tension net, an airbag, and an air pump.

[0009] There are multiple airbags and air pumps, and they correspond one-to-one. The multiple airbags are fixed in a ring inside the anti-blocking cylinder.

[0010] The tension net is ring-shaped, with the upper end of the tension net fixed inside the anti-blocking cylinder and the lower end of the tension net fixed to the inner ring of multiple airbags;

[0011] The air pump is fixed outside the anti-clogging cylinder and is connected to the air bag;

[0012] The anti-blocking cylinder can be detachably installed at the output end of the concrete delivery pipe;

[0013] The airbag inflates, causing the tension net to deform and clear the blockage inside the anti-blockage cylinder.

[0014] As an improvement, multiple airbags arranged in a ring are fixed together;

[0015] Multiple airbags arranged in a ring shape form a ring-shaped drainage bag;

[0016] The anti-blocking cylinder is a cylindrical shape that runs through its axis;

[0017] In the initial state, the axis of the annular unblocking bladder composed of multiple airbags is on the same straight line as the axis of the anti-clogging cylinder.

[0018] As an improvement, in the initial state, the axis of the tension net and the axis of the anti-blocking cylinder are on the same straight line.

[0019] As an improvement, the tension mesh is made of polyester woven mesh, and the mesh diameter of the tension mesh is smaller than the diameter of the aggregate in the concrete to be poured.

[0020] As an improvement, the casting assembly also includes a concrete pump truck and a telescopic boom;

[0021] The telescopic boom is mounted on the concrete pump truck, and the concrete delivery pipe is mounted on both the concrete pump truck and the telescopic boom.

[0022] As an improvement, the anti-clogging component also includes a boom end hose;

[0023] The flexible hose at the end of the boom is fixed to the end of the anti-clogging cylinder away from the concrete delivery pipe.

[0024] As an improvement, the anti-clogging component also includes iron balls;

[0025] The iron balls are fixed on the tension net. There are multiple iron balls, and they are arranged in a ring.

[0026] A method for constructing a shallow circular dome with a steeply sloping concrete structure includes the following steps:

[0027] S1: Before concrete construction, a trial mix of concrete was conducted. For the sloping roof of the shallow circular silo, C35P6 grade concrete was selected, with a water-cement ratio controlled at 0.50. Portland cement was used, with a dosage of approximately 350 kg / m³. 3 Add 3% high-efficiency water-reducing agent and 0.8% waterproofing agent;

[0028] S2: After the reinforcement bars on the top of the silo are installed, concrete baffles are installed. The baffles are made of 3mm thick thin steel mesh welded with steel bars. The bottom of the baffles has several notches to fit on the reinforcement bars on the top of the silo. The baffles are arranged in a ring shape, and multiple ring baffles are set from the inside to the outside. The outer ring is 4m in length and each ring is 1m wide. The inner ring is 2m wide.

[0029] S3: Concrete is transported and poured using construction equipment. The concrete pouring is carried out from the inside out, from the bottom up, in horizontal circles and vertical layers. The 200mm thick concrete is poured in two 100+100mm sections, staggered between the top and bottom, and poured slowly and continuously. The next layer of concrete is poured before the previous layer has initially set. The concrete pouring is carried out clockwise around the perimeter of the silo wall, and the interval between each circle should not exceed the initial setting time of the concrete.

[0030] S4: Use a high-frequency vibrator to compact the concrete. The diameter of the vibrator is about 35mm. The insertion depth is controlled to be 30mm below the surface of the previous layer of concrete. The spacing between each vibration point should not exceed 450mm. The vibration time should be adjusted according to the fluidity of the concrete, 15-20s per point. Use a hand-held polisher to process the details.

[0031] S5: Curing of the poured concrete: immediately after pouring, cover the concrete with a layer of geotextile and use a fully automatic spray curing device to ensure a continuous supply of water during the curing period; the curing work is carried out at the initial setting, about 2 hours after pouring, and the concrete curing cycle is 14 days.

[0032] S6: After the pouring is completed and the concrete has solidified, the formwork support for the top structure of the silo and the steel truss are removed.

[0033] S7: During the concrete pouring process, multiple airbags are intermittently inflated, causing the tension net to deform inward and preventing aggregate from getting stuck in the anti-blocking cylinder.

[0034] As an improvement, the concrete used in the pouring process has a slump of 140±20mm, and the pouring speed is maintained at 12-15m / s. 3 / h.

[0035] As an improvement, the ratio of fine aggregate to coarse aggregate in concrete is 1:1.8, and the maximum particle size of coarse aggregate does not exceed 20mm.

[0036] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0037] Firstly, the periodic inflation and deflation of the air bladder drives the deformation of the tension net, automatically clearing the aggregate stuck in the anti-blockage cylinder; replacing the traditional manual shaking of the funnel, reducing the labor intensity of workers, lowering the risk of pouring interruption due to improper operation, and improving construction efficiency.

[0038] Compared to traditional construction methods, adding concrete baffles effectively reduces the runoff length of concrete on the sloping roof. During concrete vibration, the baffles prevent concrete from accumulating downwards on the entire slab surface and falling above the formwork, thus reducing concrete waste and conserving resources. This also significantly improves construction quality and avoids the high costs of chiseling and repairing caused by inadequate concrete compaction, resulting in honeycomb, pitting, looseness, and voids.

[0039] Secondly, workers can use external magnets to attract iron balls and remotely control the large-scale deformation of the tensioning net to forcibly separate severely stuck aggregates; this solves the problem of stubborn blockage caused by insufficient airbag power and improves reliability under extreme working conditions; the magnet can be flexibly moved to the vicinity of the blockage point to operate the iron ball in a targeted manner and avoid ineffective disturbance; this shortens the blockage time and reduces construction delays caused by the initial setting of concrete. Attached Figure Description

[0040] Figure 1 This is a perspective view of a shallow circular dome concrete construction device with a large slope according to the present invention.

[0041] Figure 2 This is a three-dimensional schematic diagram of the anti-blocking component of a shallow circular dome large-slope concrete construction device of the present invention;

[0042] Figure 3 This is a schematic diagram of the airbag installation of a shallow circular dome large-slope concrete construction device according to the present invention. Figure 1 ;

[0043] Figure 4 This is a schematic diagram of the airbag installation of a shallow circular dome large-slope concrete construction device according to the present invention. Figure 2 ;

[0044] Figure 5 This is a schematic diagram of the iron ball installation of a shallow circular dome concrete construction device according to the present invention.

[0045] In the diagram: 100, pouring assembly; 110, concrete pump truck; 120, telescopic boom; 130, concrete delivery pipe; 200, anti-clogging assembly; 210, anti-clogging cylinder; 220, tension net; 230, airbag; 240, air pump; 250, iron ball; 260, boom end hose. Detailed Implementation

[0046] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0047] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Example 1: As Figures 1-4 As shown, this application discloses a shallow circular dome with a large slope concrete construction device, which includes a pouring component 100 and an anti-blocking component 200.

[0050] The pouring assembly 100 includes a concrete pump truck 110, a telescopic boom 120 and a concrete delivery pipe 130, and the anti-blocking assembly 200 includes an anti-blocking cylinder 210, a tension net 220, an airbag 230, an air pump 240 and a boom end hose 260.

[0051] There are multiple airbags 230 and air pumps 240, and they correspond one to one. Multiple airbags 230 are fixed in a ring inside the anti-blocking cylinder 210.

[0052] Multiple airbags 230 arranged in a ring are fixed to each other;

[0053] Multiple airbags 230 are arranged in a ring to form a ring-shaped drainage bag;

[0054] The anti-blocking cylinder 210 is a cylindrical shape that runs through its axis;

[0055] In the initial state, the axis of the annular unblocking bladder composed of multiple airbags 230 is on the same straight line as the axis of the anti-blocking cylinder 210.

[0056] The tension net 220 is ring-shaped, with its upper end fixed inside the anti-blocking cylinder 210 and its lower end fixed to the inner ring of multiple airbags 230.

[0057] In the initial state, the axis of the tension net 220 and the axis of the anti-blocking cylinder 210 are on the same straight line.

[0058] The airbag 230 inflates, causing the tension net 220 to deform and clear the blockage inside the anti-blockage cylinder 210.

[0059] Specifically, during the concrete conveying process, the airbag 230 is controlled to expand. When the airbag 230 expands, it drives the tension net 220 to move inward and close to the axis of the anti-blocking cylinder 210. During the movement, it comes into contact with the concrete being conveyed inside and the aggregate in the concrete, which can prevent the aggregate from getting stuck in the anti-blocking cylinder 210 and thus clear the blockage of the concrete.

[0060] The tension mesh 220 is made of polyester woven mesh, and the large mesh diameter of tension mesh 220 is smaller than the diameter of the aggregate in the concrete to be poured.

[0061] Specifically, the mesh diameter of the tension mesh 220 is smaller than the diameter of the aggregate in the concrete to be poured, which can prevent the aggregate in the concrete from getting stuck in the mesh of the tension mesh 220, thus preventing it from being transported and causing blockage.

[0062] The air pump 240 is fixed outside the anti-blocking cylinder 210, and the air pump 240 is connected to the airbag 230;

[0063] Specifically, by activating the air pump 240, air can be supplied to the airbag 230.

[0064] The anti-blocking cylinder 210 is detachably installed at the output end of the concrete conveying pipe 130;

[0065] Specifically, the anti-clogging cylinder 210 is detachable, which makes it easy to repair or replace.

[0066] The telescopic boom 120 is mounted on the concrete pump truck 110, and the concrete delivery pipe 130 is mounted on both the concrete pump truck 110 and the telescopic boom 120.

[0067] The boom end hose 260 is fixed to the end of the anti-blocking cylinder 210 away from the concrete delivery pipe 130.

[0068] A method for constructing a shallow circular dome with a steeply sloping concrete structure includes the following steps:

[0069] S1: Before concrete construction, a trial mix of concrete was conducted. For the sloping roof of the shallow circular silo, C35P6 grade concrete was selected, with a water-cement ratio controlled at 0.50. Portland cement was used, with a dosage of approximately 350 kg / m³. 3 Add 3% high-efficiency water-reducing agent and 0.8% waterproofing agent;

[0070] S2: After the reinforcement bars on the top of the silo are installed, concrete baffles are installed. The baffles are made of 3mm thick thin steel mesh welded with steel bars. The bottom of the baffles has several notches to fit on the reinforcement bars on the top of the silo. The baffles are arranged in a ring shape, and multiple ring baffles are set from the inside to the outside. The outer ring is 4m in length and each ring is 1m wide. The inner ring is 2m wide.

[0071] S3: Concrete is transported and poured using construction equipment. The concrete pouring is carried out from the inside out, from the bottom up, in horizontal circles and vertical layers. The 200mm thick concrete is poured in two 100+100mm sections, staggered between the top and bottom, and poured slowly and continuously. The next layer of concrete is poured before the previous layer has initially set. The concrete pouring is carried out clockwise around the perimeter of the silo wall, and the interval between each circle should not exceed the initial setting time of the concrete.

[0072] S4: Use a high-frequency vibrator to compact the concrete. The diameter of the vibrator is about 35mm. The insertion depth is controlled to be 30mm below the surface of the previous layer of concrete. The spacing between each vibration point should not exceed 450mm. The vibration time should be adjusted according to the fluidity of the concrete, 15-20s per point. Use a hand-held polisher to process the details.

[0073] S5: Curing of the poured concrete: immediately after pouring, cover the concrete with a layer of geotextile and use a fully automatic spray curing device to ensure a continuous supply of water during the curing period; the curing work is carried out at the initial setting, about 2 hours after pouring, and the concrete curing cycle is 14 days.

[0074] S6: After the pouring is completed and the concrete has solidified, the formwork support for the top structure of the silo and the steel truss are removed.

[0075] S7: During the concrete pouring process, multiple airbags 230 are intermittently inflated, causing the tension net 220 to deform inward, thus preventing aggregate from getting stuck in the anti-blocking cylinder 210.

[0076] The concrete used in the pouring process has a slump of 140±20mm, and the pouring speed is maintained at 12-15m / s. 3 / h;

[0077] The ratio of fine aggregate to coarse aggregate in concrete is 1:1.8, and the maximum particle size of coarse aggregate does not exceed 20mm.

[0078] The concrete pump truck 110, telescopic boom 120, concrete delivery pipe 130 and boom end hose 260 are all existing technologies and will not be described in detail here.

[0079] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0080] The periodic inflation and deflation of the airbag 230 drives the deformation of the tension net 220, automatically clearing the aggregate stuck in the anti-blockage cylinder 210; replacing the traditional manual shaking of the funnel, reducing the labor intensity of workers, reducing the risk of pouring interruption due to improper operation, and improving construction efficiency.

[0081] Compared to traditional construction methods, adding concrete baffles effectively reduces the runoff length of concrete on the sloping roof. During concrete vibration, the baffles prevent concrete from accumulating downwards on the entire slab surface and falling above the formwork, thus reducing concrete waste and conserving resources. This also significantly improves construction quality and avoids the high costs of chiseling and repairing caused by inadequate concrete compaction, resulting in honeycomb, pitting, looseness, and voids.

[0082] Example 2: During use, the above-mentioned device uses airbags 230 at different positions to expand and resist the tension net 220, preventing aggregates in the conveyed concrete from getting stuck in the anti-blocking cylinder 210. However, the anti-blocking efficiency is poor, and the separation effect is poor when there is severe sticking between concrete aggregates. Therefore, the solution in Example 1 is improved, such as... Figure 5 As shown:

[0083] The anti-blocking component 200 also includes an iron ball 250;

[0084] Iron balls 250 are fixed on tension net 220. There are multiple iron balls 250, and the multiple iron balls 250 are distributed in a ring.

[0085] Specifically, when encountering a situation where concrete aggregate is severely stuck inside the anti-blocking cylinder 210, a worker can pick up a magnet from the outside, attract multiple iron balls 250 on the tension net 220, and then move the magnet to cause the tension net 220 to deform and change position over a wide range.

[0086] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0087] Workers can use an external magnet to attract the iron ball 250 and remotely control the large-scale deformation of the tension net 220 to forcibly separate severely stuck aggregates; solve the problem of stubborn blockage caused by insufficient power of the airbag 230 and improve reliability under extreme working conditions; the magnet can be flexibly moved to the vicinity of the blockage point to operate the iron ball 250 in a targeted manner and avoid ineffective disturbance; shorten the blockage time and reduce construction delays caused by the initial setting of concrete.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shallow circular dome-shaped concrete construction device with a large slope, characterized in that, Includes a casting component (100) and an anti-clogging component (200); The pouring assembly (100) includes a concrete delivery pipe (130), and the anti-blocking assembly (200) includes an anti-blocking cylinder (210), a tension net (220), an airbag (230), and an air pump (240). There are multiple airbags (230) and air pumps (240), and they correspond one to one. Multiple airbags (230) are fixed in a ring inside the anti-blocking cylinder (210); The tension net (220) is ring-shaped. The upper end of the tension net (220) is fixed inside the anti-blocking cylinder (210), and the lower end of the tension net (220) is fixed to the inner ring of multiple airbags (230). The air pump (240) is fixed outside the anti-blocking cylinder (210), and the air pump (240) is connected to the airbag (230); The anti-blocking cylinder (210) is detachably installed at the output end of the concrete conveying pipe (130); The airbag (230) inflates, causing the tension net (220) to deform and clear the blockage in the anti-blocking cylinder (210).

2. The shallow circular dome large-slope concrete construction device as described in claim 1, characterized in that, Multiple airbags (230) arranged in a ring are fixed to each other; Multiple airbags (230) are arranged in a ring to form a ring-shaped drainage bag; The anti-blocking cylinder (210) is a cylindrical shape that runs through its axis; In the initial state, the axis of the annular unblocking bladder formed by multiple airbags (230) is on the same straight line as the axis of the anti-blocking cylinder (210).

3. The shallow circular dome large-slope concrete construction device as described in claim 1, characterized in that, In the initial state, the axis of the tension net (220) and the axis of the anti-blocking cylinder (210) are on the same straight line.

4. The shallow circular dome large-slope concrete construction device as described in claim 3, characterized in that, The tension mesh (220) is made of polyester woven mesh, and the mesh diameter of the tension mesh (220) is smaller than the diameter of the aggregate in the concrete to be poured.

5. The shallow circular dome large-slope concrete construction device as described in claim 1, characterized in that, The pouring assembly (100) also includes a concrete pump truck (110) and a telescopic boom (120); The telescopic boom (120) is mounted on the concrete pump truck (110), and the concrete delivery pipe (130) is mounted on both the concrete pump truck (110) and the telescopic boom (120).

6. The shallow circular dome large-slope concrete construction device as described in claim 5, characterized in that, The anti-clogging assembly (200) also includes a boom end hose (260); The boom end hose (260) is fixed to the end of the anti-blocking cylinder (210) away from the concrete delivery pipe (130).

7. The shallow circular dome large-slope concrete construction device as described in claim 1, characterized in that, The anti-blocking component (200) also includes an iron ball (250); Iron balls (250) are fixed on the tension net (220). There are multiple iron balls (250), and the multiple iron balls (250) are distributed in a ring.

8. A method for constructing a shallow circular dome with a steeply sloping concrete structure, characterized in that... The accompanying device for constructing a shallow circular dome with a steep slope as described in any one of claims 1-7 includes the following steps: S1: Before concrete construction, a trial mix of concrete was conducted. For the sloping roof of the shallow circular silo, C35P6 grade concrete was selected, with a water-cement ratio controlled at 0.

50. Portland cement was used, with a dosage of approximately 350 kg / m³. 3 Add 3% high-efficiency water-reducing agent and 0.8% waterproofing agent; S2: After the reinforcement bars on the top of the silo are installed, concrete baffles are installed. The baffles are made of 3mm thick thin steel mesh welded with steel bars. The bottom of the baffles has several notches to fit on the reinforcement bars on the top of the silo. The baffles are arranged in a ring shape, and multiple ring baffles are set from the inside to the outside. The outer ring is 4m in length and each ring is 1m wide. The inner ring is 2m wide. S3: Concrete is transported and poured using construction equipment. The concrete pouring is carried out from the inside out, from the bottom up, in horizontal circles and vertical layers. The 200mm thick concrete is poured in two 100+100mm sections, staggered between the top and bottom, and poured slowly and continuously. The next layer of concrete is poured before the previous layer has initially set. The concrete pouring is carried out clockwise around the perimeter of the silo wall, and the interval between each circle should not exceed the initial setting time of the concrete. S4: Use a high-frequency vibrator to compact the concrete. The diameter of the vibrator is about 35mm. The insertion depth is controlled to be 30mm below the surface of the previous layer of concrete. The spacing between each vibration point should not exceed 450mm. The vibration time should be adjusted according to the fluidity of the concrete, 15-20s per point. Use a hand-held polisher to process the details. S5: Curing of the poured concrete: immediately after pouring, cover the concrete with a layer of geotextile and use a fully automatic spray curing device to ensure a continuous supply of water during the curing period; the curing work is carried out at the initial setting, about 2 hours after pouring, and the concrete curing cycle is 14 days. S6: After the pouring is completed and the concrete has solidified, the formwork support for the top structure of the silo and the steel truss are removed. S7: During the concrete pouring process, multiple airbags (230) are intermittently inflated, causing the tension net (220) to deform inward, thus preventing aggregate from getting stuck in the anti-blocking cylinder (210).

9. A method for constructing a shallow circular dome with a steeply sloping concrete structure as described in claim 8, characterized in that... The concrete used in the pouring process has a slump of 140±20mm, and the pouring speed is maintained at 12-15m / s. 3 / h.

10. A method for constructing a shallow circular dome with a steeply sloping concrete structure as described in claim 8, characterized in that, The ratio of fine aggregate to coarse aggregate in concrete is 1:1.8, and the maximum particle size of coarse aggregate does not exceed 20mm.

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