Slip form construction concrete curing system and method

Abstract

The invention discloses a slip-form construction concrete curing system and method, and belongs to the field of building construction. The concrete curing system comprises curing film cloth, a horizontal support, a rope winding and unwinding device, a pull rope and a spray head. The horizontal support is arranged on one side of the flexible curing film cloth, the horizontal support is connected with the pull rope, and the pull rope is controlled to be lowered or retracted through the rope retracting and releasing device, so that the curing film cloth is controlled to cover concrete after mold stripping, and spraying curing is carried out on the surface of the concrete by controlling the spray head. Moreover, the height of the curing film cloth is associated with the layer height of concrete pouring and the pouring time, so that the total curing duration of the concrete from entering the mold to curing completion can be ensured, the strength of the concrete is favorably increased, and the quality of the concrete is improved. The electromagnetic springs are arranged at the ends of the horizontal supports, the maintenance film cloth is in lap joint to form a whole, especially in silo construction, the perimeter of the maintenance film cloth can be adjusted and controlled through the electromagnetic springs, and the effect of reducing frictional resistance in the climbing process is achieved.

Description

Technical Field

[0001] The invention relates to a sliding form construction concrete curing system and method, belonging to the field of building construction. Background Art

[0002] In the construction of buildings or structures, slipform construction is a common construction method. Figure 1 As shown, the climbing mechanism 2 can drive the main beam 3 to climb along the guide rail column 1. A main column 4 is arranged below the main beam 3, and the main column 4 is connected to a construction platform 5. A steel formwork 7 is also arranged on the main column 4 through a formwork connector 6. In the slipform construction, the steel formwork is lifted upward along with the main column, and the concrete under the steel formwork still needs to be cured after demolding. How to perform concrete curing without affecting the climbing of the formwork is a construction problem that needs to be solved urgently. Summary of the invention

[0003] In view of the problem in the prior art that concrete still needs to be cured after being removed from the formwork in slipform construction, the present invention provides a slipform construction concrete curing system and method, which can perform concrete curing without affecting the climbing of the slipform.

[0004] In order to solve the above technical problems, the present invention includes the following technical solutions: A slipform construction concrete curing system, used for silo concrete construction, includes a curing membrane, a horizontal support, a rope retracting and releasing device, a pull rope and a sprinkler; A plurality of horizontal supports are arranged at intervals along the height direction on one side of the curing membrane away from the concrete structure, and a plurality of vertical through holes are arranged at intervals along the length direction of the horizontal supports, and a pull rope is arranged in the through hole, and a rope retracting and releasing device is connected to the top of the pull rope, and the rope retracting and releasing device is arranged on the sliding form; A plurality of nozzles are also arranged at intervals on the curing membrane cloth, and the nozzles on the side of the curing membrane cloth away from the concrete structure are connected to the water supply device; The curing membrane is set under the formwork of the slipform, and the curing membrane can be raised or lowered to the height of the concrete curing area by pulling the horizontal support through the retracting rope device; Several curing membranes are arranged in parallel under the slipform, and the corresponding horizontal support ends of adjacent curing membranes are connected by electromagnetic springs; the electromagnetic springs can change the circumference of the enclosed curing membranes so that the curing membranes cover the concrete surface or stay away from the concrete surface.

[0005] Furthermore, the horizontal support is a steel wire rope or a horizontally arranged slender rod.

[0006] Furthermore, the height of the sliding formwork is H 1 , the height of the maintenance area is H 2 , the height of the curing membrane is H 3, the pouring thickness of each layer is D, and the climbing interval time is T 1 , the total curing time after concrete pouring is T 2 , then: H 3 ≥H 2 =(T 2 -T 1 )×H 1 / D.

[0007] Furthermore, a maintenance operation platform and a repair operation platform are suspended below the formwork.

[0008] Accordingly, the present invention also provides a slipform construction concrete curing method, using the slipform construction concrete curing system, the method comprises the following steps: Step 1: Install the slipform and install the concrete curing system at the bottom of the slipform; Step 2: Concrete is poured layer by layer. When the formwork rises one layer to a pouring height, the pull rope is lowered one layer by the rope-retracting device, so that the curing membrane covers the concrete after the formwork is removed, and the nozzle is controlled to spray the concrete surface as needed; Step 3. When the curing membrane cloth is lowered to fully unfolded and the formwork climbs up one layer of casting height, first control the electromagnetic spring to extend or compress, change the circumference of the curing membrane cloth, and make the curing membrane cloth away from the concrete surface. The curing membrane cloth remains in the unfolded state and climbs up with the sliding formwork; after climbing into place, control the electromagnetic spring to compress or extend, change the circumference of the curing membrane cloth, and make the curing membrane cloth cover the concrete surface.

[0009] Due to the adoption of the above technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the slipform construction concrete curing system provided by the present invention, by arranging a horizontal support on one side of the flexible curing membrane cloth, connecting the horizontal support with a pull rope, and controlling the lowering or recovery of the pull rope through a retracting rope device, thereby controlling the curing membrane cloth to cover the concrete after demolding, and spraying and curing the concrete surface by controlling the nozzle. Moreover, by associating the height of the curing area with the layer height and pouring time of the concrete pouring, the total curing time of the concrete from entering the mold to the completion of curing can be guaranteed, which is beneficial to the strength increase of the concrete and improves the quality of the concrete. By arranging an electromagnetic spring at the end of the horizontal support, the curing membrane cloth can be overlapped and formed into a whole, thereby improving the curing effect. Especially in silo construction, the circumference of the curing membrane cloth can also be controlled by the electromagnetic spring to achieve the effect of reducing the friction resistance during the climbing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of a concrete curing system in slipform construction in one embodiment of the present invention; Figure 2 is a structural schematic diagram of a concrete curing system in one embodiment of the present invention; Figure 3 It is a schematic diagram of a curing membrane cloth, a horizontal support, a pull rope, a nozzle and a foldable water pipe in one embodiment of the present invention; Figure 4 It is a schematic diagram of a pull rope, a steel wire rope, and a curing membrane cloth in one embodiment of the present invention.

[0011] The numbers in the figure are as follows: 1-guide rail column; 2-climbing mechanism; 3-main beam; 4-main column; 5-construction platform; 6-formwork connector; 7-steel formwork; 8-maintenance operation platform; 9-repair operation platform; 10-Maintenance system; 11-Maintenance membrane cloth; 12-Horizontal support; 13-Rope retracting and releasing device; 14-Pull rope; 15-Nozzle; 16-Foldable hose; 17-Electromagnetic spring. DETAILED DESCRIPTION

[0012] The slipform construction concrete curing system and method provided by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer in conjunction with the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0013] Combination Figures 1 to 4 As shown, the slipform construction concrete curing system provided in this embodiment includes a curing membrane 11, a horizontal support 12, a rope retracting and releasing device 13, a pull rope 14 and a nozzle 15.

[0014] The curing membrane 11 can be made of plastic film, woven cloth or other flexible insulation devices, covering the surface of the concrete. A number of horizontal supports 12 are arranged at intervals along the height direction on the side of the curing membrane away from the concrete structure. The horizontal support 12 is arranged at intervals along the length direction. A pull rope 14 is arranged in the through hole. The top of the pull rope 14 is connected to a rope retracting device 13, which is arranged on the slip form. The curing membrane can be raised or lowered by pulling the horizontal support with the rope retracting device. The horizontal support can be a steel wire rope or a horizontally arranged slender rod.

[0015] A plurality of nozzles 15 are arranged at intervals on the curing membrane 11, and a foldable hose 16 is arranged on the side of the curing membrane away from the concrete structure, the foldable hose is connected to the nozzle, and the foldable hose is also connected to a water supply device, which generally includes a water pipe, a water pump and a water tank. As an example, the foldable hose can be a corrugated pipe or other hoses.

[0016] In a specific embodiment, the slipform is used for silo concrete construction, and a number of parallel curing membranes are arranged under the slipform template. The corresponding horizontal supports 12 on adjacent curing membranes are connected by electromagnetic springs 17. The electromagnetic springs can change the circumference of the enclosed curing membranes. For example, for the outside of the silo, after the electromagnetic spring is tightened, the curing membrane can be attached to the outer wall of the silo to cure the concrete. After the electromagnetic spring is stretched, the circumference of the curing membrane increases, which makes it easier for the formwork to pull the curing membrane upward. For the inner wall of the silo, the electromagnetic spring is initially in an extended state, and the curing membrane covers the concrete after demolding. When the curing membrane needs to climb, the electromagnetic spring is tightened to reduce the circumference of the curing membrane, so that the curing membrane is separated from the concrete, reducing friction during climbing. The electromagnetic spring is a spring component that works in conjunction with the electromagnetic element in the electromagnetic system. The spring and the electromagnetic force form a dynamic balance system, which stores / releases energy through deformation to achieve precise control of mechanical movements. The main innovation of this embodiment is that the electromagnetic spring structure is used to control the circumference of the maintenance membrane cloth, thereby reducing the friction of the maintenance membrane cloth during the climbing process.

[0017] In a specific embodiment, the height of the template is H 1 , the height of the maintenance area is H 2 , the height of the curing membrane is H 3 , the pouring thickness of each layer is D, and the climbing interval time is T 1 , the total curing time after concrete pouring is T 2 , then: H 3 ≥H 2 =(T 2 -T 1 )×H 1 / D.

[0018] In a specific embodiment, a maintenance operation platform and a repair operation platform are suspended below the formwork.

[0019] The method for concrete curing using the slipform construction concrete curing system comprises the following steps: Step 1: Install the slipform and install the concrete curing system at the bottom of the slipform; Step 2: pour the concrete in layers. When the formwork rises to a pouring height, the pull rope is lowered by one layer through the rope-retracting device, so that the curing film covers the concrete after the formwork is removed. The nozzle is controlled to spray the concrete surface as needed. Step 3. When the curing membrane cloth is lowered to fully unfolded and the formwork climbs up one layer of casting height, first control the electromagnetic spring to extend or compress, change the circumference of the curing membrane cloth, and make the curing membrane cloth away from the concrete surface. The curing membrane cloth remains in the unfolded state and climbs up with the sliding formwork; after climbing into place, control the electromagnetic spring to compress or extend, change the circumference of the curing membrane cloth, and make the curing membrane cloth cover the concrete surface.

[0020] In a specific embodiment, the slipform concrete construction is divided into three working sections: pouring section, maintenance section and repair section. The three working sections are sequentially constructed from top to bottom for 24 hours without interruption. The heights of the three working sections are 1.2m, 2.4m and 1.2m respectively. The concrete is poured in layers, each layer is 0.3m thick, and one layer is poured every 2 hours. The sliding speed of the slipform is 0.15m / h, the template height is 1.2m, and the concrete takes 1.2÷0.15=8h from entering the mold to leaving the mold. Referring to the temperature conditions, the concrete strength can reach the required demolding strength (i.e. 0.2~0.4N / mm 2 ). The curing section is set to 2.4m, then 2.4÷0.15=16h, and the total curing time of the concrete needs to be controlled to 24 hours. The concrete structure is constructed from the bottom to the top, and the initial height of the demolding concrete is 0.3m. At this time, it is only necessary to lower the curing membrane by 0.3m. The sliding formwork climbs up by 0.3m every 2 hours, and the curing membrane is lowered by 0.3m until the height of the curing membrane is lowered to 2.4m. After that, the curing membrane remains in a fully expanded state and slides up synchronously with the sliding formwork, so that the curing time of the concrete after demolding can always be kept at 16 hours. Control the nozzle to spray and cure the concrete surface according to needs or set time. Set a horizontal support at an interval of 0.3m to facilitate the control of the lowering height of the curing membrane. Until the slipform slides to the top and the entire concrete structure is constructed, the pull rope will be lifted by 0.3m every two hours, and the horizontal support will be lifted up one layer every 2 hours from bottom to top, driving the curing membrane to be lifted up one layer until the curing membrane is completely lifted, and the concrete is completely cured.

[0021] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0022] The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A slipform construction concrete curing system for silo concrete construction, characterized in that: It includes a curing membrane, a horizontal support, a rope-retracting device, a pull rope and a sprinkler; A plurality of horizontal supports are arranged at intervals along the height direction on one side of the curing membrane away from the concrete structure, and a plurality of vertical through holes are arranged at intervals along the length direction of the horizontal supports, and a pull rope is arranged in the through hole, and a rope retracting and releasing device is connected to the top of the pull rope, and the rope retracting and releasing device is arranged on the sliding form; A plurality of nozzles are also arranged at intervals on the curing membrane cloth, and the nozzles on the side of the curing membrane cloth away from the concrete structure are connected to the water supply device; The curing membrane is set under the formwork of the slipform, and the curing membrane can be raised or lowered to the height of the concrete curing area by pulling the horizontal support through the retracting rope device; Several curing membranes are arranged in parallel under the slipform, and the corresponding horizontal support ends of adjacent curing membranes are connected by electromagnetic springs; the electromagnetic springs can change the circumference of the enclosed curing membranes so that the curing membranes cover the concrete surface or stay away from the concrete surface.

2. The slipform construction concrete curing system according to claim 1, characterized in that: The horizontal support is a steel wire rope or a horizontally arranged slender rod.

3. The slipform construction concrete curing system according to claim 1, characterized in that: The height of the slipform is H1, the height of the curing area is H2, the height of the curing membrane is H3, the pouring thickness of each layer is D, the climbing interval time is T1, and the total curing time after concrete pouring is T2, then: H3≥H2=(T2-T1)×H1 / D.

4. The slipform construction concrete curing system according to claim 1, characterized in that: A maintenance operation platform and a repair operation platform are suspended under the formwork.

5. A method for curing concrete in slipform construction, characterized in that: Using the slipform construction concrete curing system according to any one of claims 1 to 4, the method comprises the following steps: Step 1: Install the slipform and install the concrete curing system at the bottom of the slipform; Step 2: pour the concrete in layers. When the formwork rises to a pouring height, the pull rope is lowered by one layer through the rope-retracting device, so that the curing film covers the concrete after the formwork is removed. The nozzle is controlled to spray the concrete surface as needed. Step 3. When the curing membrane cloth is lowered to fully unfolded and the formwork climbs up one layer of casting height, first control the electromagnetic spring to extend or compress, change the circumference of the curing membrane cloth, and make the curing membrane cloth away from the concrete surface. The curing membrane cloth remains in the unfolded state and climbs up with the sliding formwork; after climbing into place, control the electromagnetic spring to compress or extend, change the circumference of the curing membrane cloth, and make the curing membrane cloth cover the concrete surface.

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