Slip form heat preservation and maintenance device and construction method

Abstract

The invention provides a slip form heat preservation maintenance device and a construction method, the device comprises a shielding layer, a protective layer and a fire source, the shielding layer is arranged on the outer side of a concrete cylinder and is opposite to an operation platform at the bottom of a slip form device, the top of the shielding layer is connected with the slip form device, and the bottom of the shielding layer can be opened and closed; the protective layer is arranged on the outer side of the concrete barrel, the top of the protective layer is connected with the operation platform, and the bottom of the protective layer freely droops; the fire source is arranged on the inner side of the concrete barrel. The construction method has the beneficial effects that covering maintenance of the winter slip form concrete cylinder is achieved, the construction quality of the slip form concrete cylinder is improved, in the construction process, the sealing performance of the concrete cylinder is guaranteed, heat loss is prevented, improvement of the strength of the concrete cylinder is guaranteed, the protective layer, the shielding layer and the sealing layer are all connected with the slip form device, and the construction efficiency is improved. The structure is simple and operation is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a slipform thermal insulation maintenance device and a construction method. Background Art

[0002] During the construction of large-diameter cylinders, due to the process characteristics of the slipform, the work is usually carried out continuously for 24 hours. The construction speed and quality are greatly affected by the construction site, climate conditions, and the technical level of the construction team. If the slipform speed is too fast, the concrete strength in the lower part of the cylinder will be too low, and it will not be able to bear the weight of the concrete and the slipform, and collapse accidents are likely to occur. If the slipform speed is too slow, the concrete will be too firmly bonded to the sliding formwork, making demolding more difficult. Therefore, the control of the sliding speed is critical, and experienced technicians are required to judge according to the temperature and humidity progress. In cold areas or during winter construction, the effect of temperature on concrete strength is particularly obvious.

[0003] In a low temperature environment, a common method is to add antifreeze and retarder to the concrete soil. The antifreeze grade is selected according to the lowest temperature of the month in the area. Retarder is used to prevent the initial setting of concrete from being too fast in a low temperature environment. In a cold construction environment, the temperature difference between the inside and outside of the concrete is large, the strength rises slowly, the slower initial setting, the slower release of hydration heat, and the slower sliding speed are conducive to construction safety. Concrete curing often adopts the measure of brushing curing agent.

[0004] When the construction period is short and the slipform process is in winter construction, the conventional winter construction method or measure of only adding antifreeze and retarder cannot meet the progress requirements. It is also necessary to cure the concrete just out of the slipform to meet the minimum hydration heat requirements and quickly improve the concrete strength. One of the best ways to cure slipform concrete is to cover it, which is both heat-insulating and moisture-retaining, but it is difficult to operate on the slipform device. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a slipform thermal insulation and maintenance device and a construction method, which effectively solves the problem of difficult covering and maintenance operations on slipform concrete and overcomes the shortcomings of the prior art.

[0006] The technical solution adopted by the present invention is: a sliding form thermal insulation curing device, comprising:

[0007] The shielding layer is arranged on the outside of the concrete cylinder and is arranged opposite to the operating platform at the bottom of the slipform device. The top of the shielding layer is connected to the slipform device, and the bottom of the shielding layer can be opened and closed;

[0008] A protective layer is arranged on the outside of the concrete cylinder, the top of which is connected to the operating platform and the bottom of which hangs freely;

[0009] The fire source is arranged on the inner side of the concrete cylinder.

[0010] Furthermore, it also includes a sealing layer, which is arranged at the bottom of the slipform device and covers the top of the concrete cylinder.

[0011] Furthermore, a connecting portion is provided on the top of the shielding layer, and the connecting portion is arranged at the bottom of the sliding form device.

[0012] Furthermore, the protective layer includes a thermal insulation layer, and the thermal insulation layer is arranged close to the outer side of the concrete cylinder.

[0013] Furthermore, a heating layer is provided on a side of the thermal insulation layer away from the concrete cylinder.

[0014] Furthermore, a barrier layer is provided on a side of the heating layer away from the thermal insulation layer.

[0015] Furthermore, the heating layer and the thermal insulation layer have the same length, and the barrier layer has a length greater than the heating layer and the thermal insulation layer.

[0016] Furthermore, a fastening device is provided on the outer side of the protective layer, and the fastening device is retractable.

[0017] Furthermore, a smoke exhaust pipe is provided above the fire source, and the smoke exhaust pipe is arranged around the inner side of the concrete cylinder.

[0018] A construction method using the above-mentioned slipform thermal insulation curing device comprises the following steps:

[0019] Open the shielding layer and spray a curing agent on the outer side of the concrete cylinder;

[0020] The protective layer covers the outer side of the concrete cylinder, and protects the concrete cylinder that has just been poured as the slipform device moves upward;

[0021] The fire source is turned on to heat the inner side of the concrete cylinder.

[0022] The advantages and positive effects of the present invention are: due to the adoption of the above-mentioned technical scheme, the covering and maintenance of the slipform concrete cylinder in winter is realized, the construction quality of the slipform concrete cylinder is improved, and during the construction process, the sealing of the concrete cylinder is guaranteed, heat loss is prevented, and the strength of the concrete cylinder is guaranteed. The protective layer, the shielding layer and the sealing layer are all connected to the slipform device, with a simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of a sliding form thermal insulation and curing device according to an embodiment of the present invention.

[0024] Figure 2 It is a partial enlarged view A of a sliding form thermal insulation and curing device according to an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of a fastening device for a sliding form thermal insulation and curing device according to an embodiment of the present invention.

[0026] Figure 4 It is a top view of the fire source connection of a slipform thermal insulation maintenance device according to an embodiment of the present invention.

[0027] In the figure:

[0028] 1. Shielding layer 2. Protective layer 2.1. Insulation layer

[0029] 2.2, Heating layer 2.3, Barrier layer 3, Fire source

[0030] 4. Fixing parts 5. Sealing layer 6. Connecting parts

[0031] 7. Fastening device 7.1. Hemp rope 7.2. Spring

[0032] 8. Positioning parts 9. Smoke exhaust pipe 10. Sliding mold device

[0033] 11. Operation platform 12. Concrete cylinder 13. Entrance and exit DETAILED DESCRIPTION

[0034] The embodiment of the present invention provides a slipform thermal insulation maintenance device and a construction method, and the embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] like Figure 1As shown, an embodiment of the present invention is a slipform heat preservation and curing device, comprising a shielding layer 1, a protective layer 2 and a fire source 3. The shielding layer 1 is arranged on the outside of the concrete cylinder 12, and is arranged opposite to the operating platform 11 at the bottom of the slipform device 10. The top of the shielding layer 1 is connected to the slipform device 10, and the bottom of the shielding layer 1 can be opened and closed. By setting an openable and closable shielding layer 1, construction personnel standing on the operating platform 11 can open the shielding layer 1 to spray the curing agent. As the slipform device 10 slides up, the outside of the entire concrete cylinder 12 can be sprayed and cured. And the shielding layer 1 can cover the concrete that has just been poured after the slipform to prevent the wind from drying the concrete surface, and has a certain heat preservation effect. In this embodiment, the shielding layer 1 is set as a plastic cloth body, the top of the plastic cloth body is fixedly connected to the bottom of the slipform device 10, and the bottom of the plastic cloth body freely hangs down to the bottom of the operating platform 11. The protective layer 2 is arranged on the outside of the concrete cylinder 12, and the top is fixed to the bottom of the operating platform 11 by a fixing member 4, and the bottom is freely hanging. The specific form of the fixing member 4 is not limited. In this embodiment, the fixing member 4 is a bolt and nut assembly. The protective layer 2 moves up with the slipform device 10 to cover and maintain the poured concrete cylinder 12. The fire source 3 is arranged on the inside of the concrete cylinder 12 to heat the inside of the concrete cylinder 12, so that the temperature difference between the inside and outside of the concrete cylinder 12 is within a specified range, further ensuring the improvement of the concrete strength.

[0037] Preferably, in order to prevent the heat inside the concrete cylinder 12 from being lost from the top of the concrete cylinder 12, a sealing layer 5 is fixed at the bottom of the slipform device 10, so that the sealing layer 5 covers the top of the concrete cylinder 12. The sealing layer 5 is made of an airtight material to prevent the generated hot air from leaking out at the top, so that the entire concrete cylinder 12 forms a relatively sealed space. In order to ensure the stability and durability of the sealing layer 5, a keel can be fixed at the bottom of the sealing layer 5 to support the sealing layer 5.

[0038] Preferably, in order to facilitate the installation of the shielding layer 1, a connecting portion 6 is provided at the top of the shielding layer 1, and the connecting portion 6 is arranged at the bottom of the slipform device 10, and plays a role of connecting or hooking the shielding layer 1. In this embodiment, the connecting portion 6 is set as a protrusion at the bottom of the slipform device 10, and the top of the plastic cloth body serving as the shielding layer 1 is hooked on the connecting portion 6. The number of the connecting portions 6 is not limited and is set according to the diameter of the concrete cylinder 12.

[0039] Specifically, Figure 2 As shown, the protective layer 2 includes a heat-insulating layer 2.1, and the heat-insulating layer 2.1 is arranged close to the outer side of the concrete cylinder 12. In this embodiment, the heat-insulating layer 2.1 is arranged as a quilt to prevent the heat generated by the hydration heat of the concrete from being lost.

[0040] Preferably, a heating layer 2.2 is provided on the side of the insulation layer 2.1 away from the concrete cylinder 12. In this embodiment, the heating layer 2.2 is set as an electric blanket, which accelerates the improvement of concrete strength through external heating. After the concrete is finally set, a large amount of heat will be released inside the concrete. The heating layer 2.2 can make the temperature difference between the surface and the inside of the concrete roughly similar. Since the heating layer 2.2 involves power supply, a cable reel needs to be placed on the slipform device 10, and the power distribution box below is used to pull the wire to draw power.

[0041] Preferably, a barrier layer 2.3 is provided on the side of the heating layer 2.2 away from the heat-insulating layer 2.1. In this embodiment, the barrier layer 2.3 is configured as a striped fabric body for windproofing and moisture retention, and the striped fabric body needs to ensure that it does not harden in a relatively cold condition.

[0042] Preferably, the length of the heating layer 2.2 is the same as that of the insulation layer 2.1, and the length of the barrier layer 2.3 is greater than that of the heating layer 2.2 and the insulation layer 2.1. The drooping length of the protective layer 2 is determined according to the local temperature of the construction and the construction sliding speed. In order to reduce the weight of the entire protective layer 2, the upper part of the protective layer 2 is set as a composite of the barrier layer 2.3, the heating layer 2.2 and the insulation layer 2.1, and the upper and lower sides of the composite are connected by fixing parts 4. The lower part of the protective layer 2 is set as a single-layer barrier layer 2.3, and the bottom of the barrier layer 2.3 is free to droop. The lower part of the protective layer 2 is used for protection during the period when the concrete strength rises slowly in the later stage.

[0043] Preferably, in order to ensure the stability of the protective layer 2 and enhance the protective effect, a fastening device 7 is provided on the outside of the protective layer 2, and the fastening device 7 is retractable. By providing a retractable fastening device 7, it is convenient to sleeve the fastening device 7 on the outside of the protective layer 2, which has a certain tightening effect on the protective layer 2, preventing cold air from entering the protective layer 2, and does not fix the position of the protective layer 2, so that the protective layer 2 can move with the sliding of the sliding form device 10. In this embodiment, if Figure 3 As shown, the fastening device 7 is composed of a hemp rope 7.1 and a spring 7.2. The hemp rope 7.1 is fixedly connected to the hooks at both ends of the spring 7.2 to form a circle. The entire protective layer 2 is slightly tightened to the concrete cylinder 12 by utilizing the contraction of the spring 7.2.

[0044] In order to prevent the fastening device 7 from being separated from the protective layer 2 when the protective layer 2 moves with the sliding form device 10, a positioning member 8 can be provided on the protective layer 2. In this embodiment, a fastening device 7 is provided at the bottom of the composite protective layer 2, and the fastening device 7 is provided between two fixing members 4. At this time, the fixing members 4 can not only connect the composite of the protective layer 2, but also position the fastening device 7. The bottom of the protective layer 2, i.e., the bottom of the barrier layer 2.3, is connected with two positioning members 8, specifically bolt and nut assemblies. A fastening device 7 is clamped between the two positioning members 8. When the protective layer 2 slides, the positioning member 8 positions the fastening device 7 and does not move relative to the protective layer 2.

[0045] Specifically, Figure 4 As shown, a smoke exhaust chimney 9 is provided above the fire source 3, and the smoke exhaust chimney 9 is arranged around the inner side of the concrete cylinder 12. There can be multiple fire sources 3, and the specific form is not limited, and it can be set as a stove. Multiple fire sources 3 are dispersedly arranged on the inner side of the bottom of the concrete cylinder 12 to heat the internal air so that the temperature difference between the inner and outer sides of the concrete cylinder 12 is within a specified range to ensure the improvement of the concrete strength. Each fire source 3 is connected to a smoke exhaust chimney 9, which connects the fire sources 3 and is arranged around the concrete cylinder 12 to increase the heat radiation area. The exhaust gas generated by the fire source 3 is discharged from the inlet and outlet 13 of the concrete cylinder 12 using the smoke exhaust chimney 9. The height of the smoke exhaust chimney 9 on the inner side of the concrete cylinder 12 should be higher than the height of the smoke exhaust chimney 9 at the inlet and outlet 13 to reduce the overflow of hot air.

[0046] A construction method using the above-mentioned slipform thermal insulation curing device comprises the following steps:

[0047] A sealing layer 5 is fixed at the bottom of the slipform device 10 to seal and insulate the entire interior of the concrete cylinder 12 to prevent heat loss.

[0048] As the slipform device 10 slides up, the concrete cylinder 12 is poured.

[0049] The construction personnel stand on the operating table and lift up the shielding layer 1 to spray the curing agent or humidify the outer side of the poured concrete cylinder 12 .

[0050] The protective layer 2 covers the outside of the concrete cylinder 12, and as the slipform device 10 moves upward, it protects the outside of the newly cast concrete cylinder 12. The innermost insulation layer 2.1 is used for insulation to prevent heat loss, the middle heating layer 2.2 is used for heating to accelerate the improvement of concrete strength, and the outer barrier layer 2.3 is used for windproof and moisture retention. In order to improve the protective effect, the fastening device 7 is clamped on the outside of the protective layer 2, and the positioning member 8 is used to prevent the fastening device 7 from being separated from the protective layer 2.

[0051] The fire source 3 is turned on to heat the inner side of the concrete cylinder 12, and the exhaust pipe 9 is used to discharge the exhaust gas.

[0052] The advantages and positive effects of the present invention are:

[0053] 1. By setting a protective layer to cover the outside of the concrete cylinder, the slipform concrete cylinder is maintained in winter, which not only keeps the temperature but also keeps the moisture, thus improving the construction quality of the slipform concrete cylinder;

[0054] 2. By setting up a shielding layer, it is more conducive to spraying the curing agent on the outside of the concrete cylinder;

[0055] 3. By setting up a sealing layer, the sealing of the concrete cylinder is ensured to prevent heat loss;

[0056] 4. By setting up fire source heating, the strength of the concrete cylinder is further guaranteed.

[0057] 5. The protective layer, shielding layer and sealing layer are all connected to the sliding formwork device, with a simple structure and convenient operation.

[0058] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A sliding form thermal insulation curing device, characterized in that: include: The shielding layer is arranged on the outside of the concrete cylinder and is arranged opposite to the operating platform at the bottom of the slipform device. The top of the shielding layer is connected to the slipform device, and the bottom of the shielding layer can be opened and closed; A protective layer is arranged on the outside of the concrete cylinder, the top of which is connected to the operating platform and the bottom of which hangs freely; The fire source is arranged on the inner side of the concrete cylinder.

2. A sliding form heat preservation and curing device according to claim 1, characterized in that: It also includes a sealing layer, which is arranged at the bottom of the slipform device and covers the top of the concrete cylinder.

3. A sliding form heat preservation and curing device according to claim 2, characterized in that: A connecting portion is provided on the top of the shielding layer, and the connecting portion is arranged at the bottom of the sliding form device.

4. A sliding form thermal insulation curing device according to any one of claims 1 to 3, characterized in that: The protective layer includes a heat-insulating layer, and the heat-insulating layer is arranged close to the outer side of the concrete cylinder.

5. A sliding form heat preservation and curing device according to claim 4, characterized in that: A heating layer is provided on a side of the thermal insulation layer away from the concrete cylinder.

6. A sliding form heat preservation and curing device according to claim 5, characterized in that: A barrier layer is provided on the side of the heating layer away from the heat-insulating layer.

7. A slipform heat preservation and curing device according to claim 6, characterized in that: The heating layer has the same length as the heat-insulating layer, and the barrier layer has a greater length than the heating layer and the heat-insulating layer.

8. A sliding form thermal insulation and curing device according to any one of claims 1-3 and 5-7, characterized in that: A fastening device is provided on the outer side of the protective layer, and the fastening device is retractable.

9. A sliding form heat preservation and curing device according to claim 8, characterized in that: A smoke exhaust pipe is arranged above the fire source and surrounds the inner side of the concrete cylinder.

10. A construction method using a slipform heat preservation and curing device as claimed in claim 1, characterized in that: The following steps are involved: Open the shielding layer and spray a curing agent on the outer side of the concrete cylinder; The protective layer covers the outer side of the concrete cylinder, and protects the concrete cylinder that has just been poured as the slipform device moves upward; The fire source is turned on to heat the inner side of the concrete cylinder.

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