A quick-setting concrete prefabricated hollow composite panel and its application method in flood control and rescue

Abstract

The invention discloses a quick-setting concrete prefabricated hollow composite board and its application method in flood fighting and rescue. The board is composed of a water-resistant degradable paper layer, a sodium carbonate layer, a calcium oxide layer, and a steel skeleton layer. The steel skeleton layer is located in the center, the calcium oxide layer is wrapped around the steel skeleton layer, the sodium carbonate layer is wrapped around the calcium oxide layer, and the water-resistant degradable paper layer is wrapped around the sodium carbonate layer. The sodium carbonate layer and the calcium oxide layer of the invention enable the concrete to solidify rapidly in the steel skeleton layer, thereby ensuring that the concrete solidifies and forms within a few minutes in a water environment and reaches a certain strength, forming a solid concrete protective layer on the water surface of the dam, resisting the squeezing and scouring of the dam by floods, preventing the collapse and collapse of the dam, changing the traditional flood fighting and rescue methods, and reinforcing the dam in a water environment more safely and efficiently without causing water pollution, and protecting the safety of people's lives and property.

Description

Technical Field

[0001] The invention belongs to a new practical material, and specifically relates to a quick-setting concrete prefabricated hollow composite board and an application method thereof in flood fighting and emergency rescue. Background Art

[0002] As global temperatures rise, glaciers melt faster, and floods often occur in the middle and lower reaches of the Yellow River and Yangtze River in my country, causing huge losses to people's lives and property. At present, flood control and rescue still use the traditional method of water-to-soil covering. People use sandbags, straw bags, and wooden stakes to block floods. When necessary, people use people to block water, or even throw heavy equipment such as vehicles into the water to prevent flood impact. Although this traditional method has played a role in blocking floods, it always feels like half the effort and twice the result, and it cannot be permanently solid. In addition, the construction is difficult and dangerous, and the solidity of the dam is not optimistic. Summary of the invention

[0003] The purpose of the present invention is to provide a quick-setting concrete prefabricated hollow composite board and its application method in flood control and rescue. Through on-site construction, the concrete is solidified and formed within a few minutes in a water environment and reaches a certain strength, forming a solid concrete protective layer on the water surface of the dam to resist the squeezing and scouring of the dam by floods.

[0004] The technical solution adopted by the present invention is: a quick-setting concrete prefabricated hollow composite board, which is composed of a water-resistant and degradable paper layer, a sodium carbonate layer, a calcium oxide layer, and a steel skeleton layer. The steel skeleton layer is located in the center, the calcium oxide layer is wrapped around the steel skeleton layer, the sodium carbonate layer is wrapped around the calcium oxide layer, and the water-resistant and degradable paper layer is wrapped around the sodium carbonate layer.

[0005] The steel bar skeleton layer is a three-dimensional skeleton composed of steel bars and iron wires.

[0006] The sodium carbonate layer is an instant sodium carbonate layer.

[0007] The thickness of the steel frame layer is 15 to 40 centimeters.

[0008] The sodium carbonate layer is an instant sodium carbonate layer.

[0009] The thickness of the sodium carbonate layer is 0.3 to 3 cm.

[0010] The thickness of the calcium oxide layer is 0.3 to 3 cm.

[0011] The invention discloses a quick-setting concrete prefabricated hollow composite board and an application method thereof in flood prevention and rescue, comprising the following steps:

[0012] 1) Insert multiple steel pipes at equal distances along the dam toward the water slope;

[0013] 2) Insert the steel skeleton layer of the quick-setting concrete prefabricated hollow composite panel into the steel pipe;

[0014] 3) Use the lifting device to control the quick-setting concrete prefabricated hollow composite panel and pump concrete into it before the quick-setting concrete prefabricated hollow composite panel enters the water;

[0015] 4) After a few minutes, sink the concrete composite panel into the water along the steel pipe;

[0016] 5) Repeat steps 2) to 4) to increase the height of the concrete protective layer;

[0017] 6) Repeat steps 1) to 4) to increase the width of the concrete protective layer.

[0018] In the present invention, the water-resistant paper is used to ensure sufficient construction time; the N value of the sodium carbonate layer is determined by the heat emitted by the reaction between the moisture in the concrete and the calcium oxide layer, and it remains solid at room temperature. It will melt into a gel-like substance only after being heated. The gel-like substance makes the concrete pumped into the hollow steel skeleton layer set quickly within a few minutes, and reaches a certain strength after 15 minutes. The strength will gradually increase with time, and finally reach a bending resistance of 10 MPa and a compressive resistance of more than 60 MPa; the calcium oxide layer is mainly used to react with the moisture in the concrete to dissipate heat to dissolve the sodium carbonate layer; the hollow steel skeleton layer has evenly arranged steel bars to support the two sides of the sodium carbonate composite board, leaving space for pumping concrete, and increasing the strength of the concrete board after forming.

[0019] The present invention rationally utilizes the chemical principles such as the heat released by the reaction of water and calcium oxide, the sodium silicate dissolving into gelatinous state under heat and reacting with calcium aluminate in concrete to make the concrete solidify rapidly, etc. Through on-site construction, the concrete can be solidified and formed in a water environment within a few minutes and reach a certain strength, and the strength increases with time, forming a solid concrete protective layer on the water surface of the dam to resist the squeezing and scouring of the dam by floods, and prevent the collapse and collapse of the dam. The traditional flood control and rescue methods are changed, and the dam is reinforced in a water environment more safely and efficiently without causing water pollution, protecting people's lives and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0021] Figure 1 The present invention is a structural diagram of a quick-setting concrete prefabricated hollow composite board specially used for flood control and disaster relief.

[0022] In the figure: 1 is a steel skeleton layer, 2 is a calcium oxide layer, 3 is a sodium carbonate layer, and 4 is a water-resistant and degradable paper layer. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0024] The invention discloses a quick-setting concrete prefabricated hollow composite board, which is composed of a water-resistant and degradable paper layer, a sodium carbonate layer, a calcium oxide layer and a steel skeleton layer. The steel skeleton layer is located in the center, the calcium oxide layer is wrapped around the steel skeleton layer, the sodium carbonate layer is wrapped around the calcium oxide layer, and the water-resistant and degradable paper layer is wrapped around the sodium carbonate layer.

[0025] The steel skeleton layer is a three-dimensional skeleton composed of steel bars and iron wires, which supports the two sides of the caustic soda composite board, reserves space for pumping concrete, and increases the strength of the concrete slab after forming. The thickness of the steel skeleton layer is determined according to the required reinforcement strength, generally controlled at 15~40 cm, which is convenient for construction operations. The steel skeleton layer generally uses 14mm diameter threaded steel.

[0026] The sodium silicate layer is an instant sodium silicate layer, and the thickness of the sodium silicate layer is determined according to the thickness of the steel skeleton layer, generally 0.3~3 cm. The instant sodium silicate used is the instant sodium silicate produced by Shandong Jinan Shouyue Chemical Technology Co., Ltd., with N of 3.0, which is solid at room temperature. Instant sodium silicate produced by other companies can also be used. It will melt into a gel-like substance only after being heated. The gel-like sodium silicate substance can make the concrete pumped into the hollow steel skeleton layer set quickly within a few minutes, reach a certain strength after 15 minutes, and the strength will gradually increase with time, and finally reach a flexural resistance of 10 MPa and a compressive resistance of more than 60 MPa.

[0027] The thickness of the calcium oxide layer is determined by the thickness of the steel skeleton layer, which is generally 0.3~3 cm.

[0028] The water-resistant and degradable paper layer is made of disposable barrier film biodegradable paper from Dongguan Changping Shanren Plastic Raw Materials Business Department, with a thickness of 1~2 mm, which is guaranteed not to degrade and melt within 3~5 minutes in a hydrated environment.

[0029] The present invention discloses a quick-setting concrete prefabricated hollow composite board and its application method in flood prevention and rescue:

[0030] 1) Insert multiple steel pipes at equal distances along the dam toward the water slope;

[0031] 2) Insert the composite plate sleeve into the steel pipe;

[0032] 3) Use the lifting device to control the composite board and pump concrete before the composite board enters the water;

[0033] 4) After a few minutes, the concrete composite panel is sunk into the water along the steel pipe;

[0034] 5) Repeat steps 2) to 4) to increase the height of the concrete protective layer;

[0035] 6) Repeat steps 1) to 4) to increase the width of the concrete protective layer.

[0036] The water-resistant degradable paper layer of the present invention ensures that the construction work in a water environment is not affected within 3 to 5 minutes, and can reinforce the dam in a water environment. The calcium oxide layer and the sodium carbonate layer can quickly solidify the concrete and achieve a certain flexural and compressive strength, and the strength will gradually increase over time.

[0037] According to tests, the concrete protective layer of the present invention reaches a flexural strength of 6 MPa and a compressive strength of 29 MPa after 15-30 minutes, and reaches a flexural strength of 10 MPa and a compressive strength of 60 MPa after 48 hours. It can build a solid cement concrete protective layer on the water surface of the dam to prevent the collapse and collapse of the dam.

[0038] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A quick-setting concrete prefabricated hollow composite panel, characterized in that: The invention is composed of a water-resistant and degradable paper layer, a sodium carbonate layer, a calcium oxide layer and a steel skeleton layer, wherein the steel skeleton layer is located in the center, the calcium oxide layer is wrapped around the steel skeleton layer, the sodium carbonate layer is wrapped around the calcium oxide layer, the water-resistant and degradable paper layer is wrapped around the sodium carbonate layer, the steel skeleton layer has a thickness of 15-40 cm, the sodium carbonate layer is an instant sodium carbonate layer, the sodium carbonate layer has a thickness of 0.3-3 cm, and the calcium oxide layer has a thickness of 0.3-3 cm.

2. The quick-setting concrete prefabricated hollow composite panel according to claim 1, characterized in that: The steel bar skeleton layer is a three-dimensional skeleton composed of steel bars and iron wires.

3. A method for applying a quick-setting concrete prefabricated hollow composite panel in flood control and rescue according to any one of claims 1 to 2, comprising the following steps: 1) Insert multiple steel pipes at equal distances along the embankment toward the water slope; 2) Insert the steel skeleton layer of the quick-setting concrete prefabricated hollow composite panel into the steel pipe; 3) Use the lifting device to control the quick-setting concrete prefabricated hollow composite panel and pump concrete into it before the quick-setting concrete prefabricated hollow composite panel enters the water; 4) After a few minutes, the concrete composite panel is sunk into the water along the steel pipe; 5) Repeat steps 2)-4) to increase the height of the concrete protective layer; 6) Repeat steps 1)-4) to increase the width of the concrete protective layer.

Images