Silo slip-form construction concrete heat preservation method

Abstract

The invention relates to the technical field of silo slip-form construction, in particular to a concrete heat preservation method for silo slip-form construction, which comprises the following steps: respectively wrapping cotton quilts on the inner ring and the outer ring of a slip-form template; sealing an inner platform, an inner hanging bracket platform, an outer hanging bracket platform and holes reserved in the wall of the silo; a heating furnace is mounted at the lower part of the silo wall slip form section; a circle of windproof cloth is hung on the external hanging scaffold; carrying out a temperature test; and pouring concrete. The inside and outside of the silo are sealed, heated and subjected to heat preservation, it is guaranteed that the concrete mold entering temperature and the concrete strength are increased, and the construction quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of silo slipform construction, and in particular to a silo slipform construction concrete insulation method. Background Art

[0002] Slipform construction is a construction technology that can rise with the height of the column or wall, and is commonly used in the construction of cylindrical high-rise buildings. During construction, due to the limited conditions for stacking materials on site, slipform construction will be a better solution to site problems, and the slipform process has a fast construction speed and can also reduce the loss rate of the formwork; slipform construction technology is a construction technology with a high degree of mechanization in concrete structure engineering and reinforced concrete drawings, fast construction speed, less on-site site occupation, strong overall structure, no construction joints on the surface of the structure, good seismic resistance, guaranteed safe operation, and significant environmental protection and comprehensive benefits. In recent years, the slipform construction technology has been continuously innovated, greatly enriching the traditional slipform construction technology. As a new construction technology, it is not only a technological innovation, but more importantly, it can bring about a reduction in construction costs and an improvement in quality and efficiency.

[0003] When carrying out silo slipform construction in winter, due to the low temperature, it is impossible to ensure that the concrete strength reaches the demolding time. Concrete is prone to fall off during the slipform process, which can seriously lead to irreversible quality problems such as collapse, making it impossible to continue subsequent construction and seriously delaying the construction period. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a concrete insulation method for silo slipform construction, so as to achieve the technical effects of increasing the speed of concrete strength increase and improving construction efficiency.

[0005] To achieve this technical purpose, the present invention adopts the following scheme: A method for thermal insulation of silo slipform construction concrete is carried out according to the following steps: S1. Wrap the quilt around the inner and outer circles of the sliding formwork respectively; S2. Select a strip of cloth of appropriate length according to the enclosed area, and use the strip of cloth to seal the inner platform, inner and outer hanger platforms, and reserved openings on the silo wall of each silo; S3. Install a heating stove near the silo wall; S4. Hang a circle of windshield cloth on the external hanging scaffolding, and install an electric heater on the hanging scaffolding facing the silo wall; S5. Start all electric heaters and heating stoves to conduct temperature test before pouring concrete; S9. After the temperature test is qualified, concrete pouring can be carried out.

[0006] Compared with the prior art, the present invention has the following beneficial effects: The present invention can ensure the temperature of concrete entering the mold, improve the strength of concrete, and improve the construction efficiency and construction quality by taking measures such as sealing the silo inside and outside and heating and heat preservation.

[0007] Further, the preferred embodiment of the present invention is: In step S2, the cloth strips are woven horizontally and vertically to form a grid.

[0008] There are four heating stoves in each silo, and the heating stoves are evenly distributed.

[0009] Concrete is made from hot water and heated sand and gravel; insulation measures are taken in the tank trucks transporting concrete.

[0010] Early strength agent, water reducing agent and antifreeze agent are added to the concrete.

[0011] The temperature of concrete leaving the machine is greater than or equal to 20℃, and the temperature of concrete entering the mold is greater than or equal to 5℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the inner platform after it is closed; Figure 3 This is a schematic diagram of the location of the heating stove; Figure 4 This is a schematic diagram of the reserved hole on the silo wall after it is closed; The markings in the figure are: 1. Quilt; 2. Cloth strips; 3. Heating stove; 4. Canvas; 5. Electric heater; 6. Inner platform; 7. Inner hanging scaffolding; 8. Outer hanging scaffolding; 9. Hole; 10. Silo wall. DETAILED DESCRIPTION

[0013] In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are provided. Figures 1 to 4 As shown, the technical solution of the present invention is clearly and completely described. Obviously, all the embodiments described are only partial embodiments of the present invention, not all embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Below, the technical solution of the present invention is described in detail with specific embodiments.

[0014] A method for thermal insulation of silo slipform construction concrete is carried out according to the following steps: S1. Wrap the quilt 1 on the inner and outer circles of the sliding formwork respectively.

[0015] S2. According to the enclosed area, select colored cloth strips 2 of appropriate length to completely enclose the inner platform 6, inner and outer hanger platforms 7, 8 and the reserved opening 9 on the silo wall 10. When enclosed, the cloth strips 2 are woven into a grid shape horizontally and vertically.

[0016] S3. Install a heating stove 3 at the lower part of the sliding form section of the silo wall 10. The heating stove 3 is arranged close to the silo wall 10, and four heating stoves 3 are evenly arranged around the center of each silo. When the heating stove 3 is in use, pay attention to smoke emission to prevent gas poisoning.

[0017] S4. Hang a circle of canvas 4 on the external hanging scaffolding 8 as a windproof cloth, and the height of the canvas 4 is greater than the height of the slipform section; on the hanging scaffolding, corresponding to the inner and outer sides of the silo wall 10, hang electric heaters 5 respectively, and the air outlet of the electric heater 5 is toward one side of the silo wall 10, and the angle between the air outlet of the electric heater 5 and the silo wall 10 is 30-40°.

[0018] S5. After all insulation work is completed and before concrete pouring, start all electric heaters and heaters to conduct temperature tests. When the lowest temperature in the working platform reaches the construction conditions within a certain period of time, prepare for concrete pouring.

[0019] S6. After the temperature test is qualified, concrete pouring is carried out. The concrete is mixed with hot water and heated sand and gravel, and early strength agent, alkaline water agent and antifreeze agent are added to the concrete. The tank trucks transporting concrete also take insulation measures to ensure that the temperature of the concrete leaving the machine is greater than 20℃ and the temperature of the concrete entering the mold is greater than or equal to 5℃.

[0020] When the strength of concrete reaches the demoulding strength required by the slipform construction process (30% of the design strength), the degree of frost damage to the concrete after demoulding is very low. Because the strength of concrete increases slowly in winter, the sliding speed needs to be slowed down to 0.1m / h to appropriately extend the time the concrete stays in the formwork and increase the demoulding time of the concrete.

[0021] The present invention effectively solves the problem that slipform construction cannot be carried out due to low temperature in winter by adding insulation measures on both sides of the slipform template, the inner platform, and the inner and outer hanger platforms. This method can improve construction efficiency and concrete rising speed and ensure construction quality.

[0022] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A silo slipform construction concrete insulation method, characterized in that: Follow these steps: S1. Wrap the quilt around the inner and outer circles of the sliding formwork respectively; S2. Select a strip of cloth of appropriate length according to the enclosed area, and use the strip of cloth to seal the inner platform, inner and outer hanger platforms, and reserved openings on the silo wall of each silo; S3. Install a heating stove near the silo wall; S4. Hang a circle of windshield cloth on the external hanging scaffolding, and install an electric heater on the hanging scaffolding facing the silo wall; S5. Start all electric heaters and heating stoves to conduct temperature tests before pouring concrete; S6. After the temperature test is qualified, concrete pouring can be carried out.

2. The silo slipform construction concrete insulation method according to claim 1 is characterized by: In step S2, the cloth strips are woven horizontally and vertically to form a grid.

3. The silo slipform construction concrete insulation method according to claim 1 is characterized by: There are four heating stoves in each silo, and the heating stoves are evenly distributed.

4. The silo slipform construction concrete insulation method according to claim 1 is characterized by: Concrete is made from hot water and heated sand and gravel; insulation measures are taken in the tank trucks transporting concrete.

5. The silo slipform construction concrete insulation method according to claim 1 is characterized by: Early strength agent, water reducing agent and antifreeze agent are added to the concrete.

6. The silo slipform construction concrete insulation method according to claim 2 is characterized by: The temperature of concrete leaving the machine is greater than or equal to 20℃, and the temperature of concrete entering the mold is greater than or equal to 5℃.

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