CN113308962A - Construction method of energy-saving artificial ice rink ground - Google Patents

Abstract

The invention provides a construction method of an energy-saving artificial ice rink ground, which comprises the following steps: s1, forming a backfill soil layer on the foundation pit backfill soil, paving a mortar gravel layer on the backfill soil layer, and performing ice ground cushion construction on the mortar gravel layer; s2, constructing a ring beam and a ring road, performing waterproof and anti-cracking treatment, and paving a leveling layer on the cushion layer on the ice ground; s3, placing a main refrigerant pipeline on the basis, and sequentially laying a heat insulation plate and a film on the basis of the ice ground; s4, sequentially installing a refrigeration branch pipe support and a refrigeration branch pipe on the basis of the ice ground, and connecting the main refrigerant pipe in series in a sealing manner; s5, carrying out pressure testing and pressure maintaining on the pipeline; s6, laying a temperature transfer layer; and S7, performing ice layer construction on the temperature transmission layer. The construction method of the energy-saving artificial ice rink ground improves the bearing capacity of the construction foundation, reduces the internal stress generated when the ice ground is frozen, reduces the damage of the ice formation to the construction foundation and has high space utilization rate.

Description

Construction method of energy-saving artificial ice rink ground

Technical Field

The invention belongs to the technical field of artificial ice ground construction methods, and particularly relates to a construction method of an energy-saving artificial ice rink ground.

Background

The projects are more and more along with the construction of the ice ground. And the ice ground is the most basic component of the ice hockey hall. The quality of the ice ground directly affects the comfort level of the game on the ice surface. The method has the advantages that higher requirements are provided for the safety, applicability and durability of the ice ground structure and the forming quality of ice making, the integrity of the bearing capacity of the ice ground construction foundation in the prior art is insufficient, large internal stress can be generated when the ice ground is frozen, outward thrust can be generated on a surrounding retaining wall, the edge of an ice body on the ice surface is prone to being subjected to expansibility cracking in the ice making process to cause damage to the edge of the ice surface, and fine cracks are prone to being generated in one-time construction of an ultra-thin concrete foundation under the ice surface.

Disclosure of Invention

In view of the above, the present invention is directed to a construction method of an energy-saving artificial ice rink ground to solve the problem of insufficient integrity of the bearing capacity of the ice ground construction foundation.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a construction method of an energy-saving artificial ice rink ground comprises the following steps: s1, digging a foundation pit of the ice ground foundation, backfilling the foundation pit after digging the foundation pit, compacting to form a backfill soil layer, paving a mortar gravel layer on the backfill soil layer, and constructing an ice ground cushion layer on the mortar gravel layer; s2, constructing a ground ring beam and a ring road on the ice ground cushion layer in the step S1, performing waterproof and anti-cracking treatment on the ice ground cushion layer and the ground ring beam and the ring road on the ice ground cushion layer, and paving a leveling layer on the ice ground cushion layer subjected to the waterproof and anti-cracking treatment to complete the ice ground foundation construction; s3, placing a main refrigerant pipeline on the ice ground foundation in the step S2, and sequentially laying a heat insulation board and a film on the ice ground foundation; s4, sequentially installing a refrigeration branch pipe support and a refrigeration branch pipe on the basis of the ice ground, and connecting the refrigeration branch pipe and the main refrigerant pipe in the step S3 in series in a sealing manner; s5, carrying out pressure test and pressure maintaining on the main refrigerant pipe and the refrigeration branch pipes connected in series; s6, paving temperature transfer layers at the upper end of the film, at the periphery of the main refrigerant pipeline and at the periphery of the refrigeration branch pipeline in the step S3; and S7, performing ice layer construction on the temperature transmission layer.

Further, in the step S1, the maximum particle size of the backfill soil particles is not more than 5mm, and multiple times of backfill soil operations are performed, wherein the virtual pavement thickness of the backfill soil is not more than 250mm, the tamping thickness is not more than 200mm, and the compaction coefficient of the backfill soil layer is not less than 0.94.

Furthermore, the paving method of the mortar gravel layer in the step S1 is that gravel is paved on a backfill soil layer and is stabilized to form the gravel layer, mortar is poured into the gravel layer immediately, the mortar is filled into the holes among the gravel, after the mortar is poured, the gravel layer is vibrated comprehensively by a flat plate vibrator, the gravel layer is overlapped by 10-20 cm during vibration, and the vibration time is not less than 30 seconds during vibration at the same position.

Furthermore, the ground ring beam and the loop are integrally cast, and the temperature transmission layer is positioned on the inner ring of the loop.

Further, in the method of sealing and connecting in series in step S4, the inlet and outlet ports of the main refrigerant pipe are coated with a sealant, the length of the coated sealant is not less than 150mm, the effective connection length between the branch inlet and outlet pipes of the main refrigerant pipe and the refrigeration branch pipe is not less than 150mm, and a fixing clamp is sleeved on the periphery of each port of the refrigeration branch pipe.

Further, the construction method of the ice layer in the step 7 comprises the following steps: a1, cleaning sundries on the temperature transfer layer; a2, cooling the temperature transfer layer by filling a refrigeration medium into the main refrigerant pipeline; a3, sprinkling water for many times on the temperature transfer layer for cooling to make ice to form a first ice layer, wherein the thickness of each sprinkling is not higher than 1mm, and the time interval of each sprinkling is not lower than 2 hours; a4, performing ice paint layer construction on the first ice layer; and A5, spraying water on the ice paint layer for multiple times to make ice to form a second ice layer.

Compared with the prior art, the construction method of the energy-saving artificial ice rink ground has the following beneficial effects:

1. according to the construction method of the energy-saving artificial ice rink ground, the procedures of backfilling soil compaction, backfilling gravel grouting, cushion layer construction, foundation ring beam and guide wall construction with concealed edges, waterproof treatment, foundation crack prevention construction, ice ground sand leveling layer laying and the like are sequentially completed in the foundation pit, and the bearing capacity of the construction foundation is improved.

2. According to the construction method of the energy-saving artificial ice rink ground, the quality problems of softening of an ice layer and incompact freezing of the ice layer in an indoor ice and snow sport project are effectively solved through repeated circulating ice making, the sport comfort degree of the ice surface is effectively improved, the internal stress generated when the ice surface is frozen is reduced, and the damage of ice formation to a construction foundation is reduced.

3. According to the construction method of the energy-saving artificial ice rink ground, the main refrigerant pipeline is arranged at the lower side of the ice surface in the ice rink, so that the energy loss is effectively reduced, the heat preservation measures of the main pipeline outside the ice rink are reduced, the ground is utilized to the maximum extent, and the energy consumption for maintaining the operation of a venue is reduced.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail with reference to examples.

A construction method of an energy-saving artificial ice rink ground comprises the following steps: s1, digging a foundation pit of the ice ground foundation, backfilling the foundation pit after digging the foundation pit, compacting to form a backfill soil layer, paving a mortar gravel layer on the backfill soil layer, and constructing an ice ground cushion layer on the mortar gravel layer;

compacting backfill soil: the backfill soil cannot be doped with organic garbage and construction garbage, does not contain stones or other impurities, has the maximum particle size of the filling particles not more than 5mm, has the virtual paving thickness of the backfill soil not more than 250mm, and is compacted by one compaction and half compaction. The step racking width is preferably 100mm, the tamping thickness is not more than 200mm, the dry unit weight of each step of soil is tested according to the standard sampling, and the upper step of earthwork can be paved in a virtual mode after the lower step of dry unit weight is qualified. It is strictly ensured that the compaction factor is not below 0.94.

Backfilling broken stone and grouting: and after the crushed stone is unloaded, the crushed stone should be spread out in time. The virtual paving thickness of the gravel layer is the loose paving thickness obtained by multiplying the design thickness by the compaction coefficient, the artificial paving thickness of the compaction coefficient is 1.25-1.30, and the mechanical paving thickness is 1.20-1.25.

And backfilling crushed stones for grouting, and grouting the crushed stones after stabilizing the pressure of the crushed stones so as to ensure the integral flatness of the ice ground and improve the bearing capacity. When grouting, the concrete is poured uniformly and the holes among the broken stones are filled. After grouting, the concrete should be fully vibrated by a flat vibrator. The overlapping should be 10-20 cm when vibrating. When the cement slurry is vibrated at the same position, the vibration time is not less than 30 seconds, so that the cement slurry does not bubble any more and is discharged.

And (3) constructing an ice ground cushion layer: pour 100mm thick C15 concrete on mortar gravel layer, for ensureing that ice ground bedding concrete placement connects combed quality and upper surface roughness control, set up the channel-section steel pouring end one side, utilize the flat vibrator to vibrate closely knit floating, receive the face at the secondary, cover film maintenance, intensity can not reach before 1.2N/mm2 and can't get into the people.

S2, constructing a ground ring beam and a ring road on the ice ground cushion layer in the step S1, performing waterproof and anti-cracking treatment on the ice ground cushion layer and the ground ring beam and the ring road on the ice ground cushion layer, and paving a leveling layer on the ice ground cushion layer subjected to the waterproof and anti-cracking treatment to complete the ice ground foundation construction;

constructing a ground ring beam and a ring road: arranging a ground beam of 250mm x 180mm on the periphery of the ice ground; the reinforcing bar is 4 phi 14, phi 6@ 200; c30 concrete (Frost concrete) is used to prevent the irregular spread of ice.

In order to ensure the flatness and ice forming regularity of the edge of the ice body and improve the integrity of the annular road ground outside the ice body, the guide wall and the annular road cushion layer around the ice rink are integrally poured. The elevation of the guide wall is strictly controlled according to the designed elevation, and the flatness is less than or equal to 3 mm.

And (3) waterproof treatment: cleaning a base layer, smearing cement mortar with the thickness of 20mm and the ratio of 1:3 to form a leveling layer, performing circular arc treatment on the internal corner and the external corner, then brushing an environment-friendly high-molecular polymer elastic waterproof material (polyurethane waterproof coating) special for the ice ground for 2 times, wherein the thickness of the waterproof layer is less than 2.0mm, coating the internal corner once, performing a water-closing test after the polyurethane waterproof coating is hardened, and leveling a cement mortar protective layer with the thickness of 20mm after 24 hours without leakage.

And (3) anti-cracking construction: the construction joint cannot be left on the ice ground, the construction is finished once, the ice ground foundation has the condition of large area and relatively thin thickness, in order to effectively prevent the ice ground foundation from cracking, a single-layer bidirectional phi 8-200 mesh reinforcement is embedded in the foundation, the ground flatness is +/-5 mm, and the vibration compaction is realized.

Paving a sand leveling layer on the ice ground: and the sand of the leveling layer is river sand and is sieved, and impurities in the sand are removed. The sand layer is fully paved to be 30mm thick, compacted and paved, the flatness is required to be +/-5 mm, and the compactness is not less than 0.94.

S3, placing a main refrigerant pipe on the ice ground foundation in the step S2, and sequentially paving a heat insulation plate and a film between the main refrigerant pipe and the ice ground foundation;

placing a main refrigerant pipeline: the main welding refrigerant pipeline is made of a seamless steel pipe with the thickness of 300 x 200 mm; adopt the segmentation welding, should cushion up with square pipe below the pipeline during the welding, the pipeline should be in the same direction as straight, should follow the pipeline below in proper order and pass through when follow-up heat preservation link plate and the film of laying, ensure can not lead to damaging heated board and film because of the welding.

The method of installing the refrigeration main pipe inside the ice rink reduces energy consumption, lays the heated board after laying the refrigerant main pipe, adopts to lay the film and reduces energy consumption loss, lays refrigeration branch pipe support (mounting) in order to guarantee that the later stage installation refrigeration system refrigeration branch pipe is arranged evenly, guarantees that the ice surface temperature transmits evenly.

Laying an insulation board: laying two layers of low-stress XPS heat-insulating plates (50mm thick), overlapping staggered joints of the two layers of plates by 300mm, gluing the joints by using heat-insulating adhesive tapes between the plate joints, and pouring polyurethane foaming agents when the joints are larger than 2mm, wherein the heat-insulating plates are required to be flat and not to warp, and the flatness requirement is +/-3 mm.

Laying a film: and (3) paving a polyethylene moisture-proof film with the thickness of 0.15mm in the length direction of the ice rink, wherein the overlapping length L is more than or equal to 100mm, and firmly adhering the gap by using a heat-insulating waterproof adhesive tape. The edge of the ice rink is 300mm higher than the ground ring beam, and the higher part of the ice rink is flatly paved on the ground ring beam.

S4, sequentially installing a refrigeration branch pipe support and a refrigeration branch pipe on the basis of the ice ground, and connecting the refrigeration branch pipe and the main refrigerant pipe in the step S3 in series in a sealing manner;

and laying a refrigeration branch pipe support, wherein the refrigeration branch pipe support is an iron fixing piece and is used for limiting and fixing the refrigeration branch pipe, and the distance between every two iron fixing pieces is 1500 mm.

The refrigeration branch pipes are installed on the refrigeration system, the distance between every two refrigeration branch pipes is 80mm, the refrigeration branch pipes are laid in the length direction of an ice rink, the refrigeration branch pipes are sequentially installed from a long edge during installation, every two adjacent refrigeration branch pipes form a loop, the end turning parts are connected through U-shaped iron pipes, the end parts of the refrigeration branch pipes are heated and softened before installation, special sealant is applied to the U-shaped pipes, and the application length of the sealant is not less than 150 mm. The effective length of the U-shaped pipe inserted into the refrigeration branch pipe is not less than 150 mm.

The inlet and outlet interfaces of the main refrigerant pipeline are coated with special sealant, the coating length is not less than 150mm, the effective length of the inlet and outlet pipes of the main refrigerant pipeline branches is not less than 150mm, and the effective connection length is not less than 150 mm. And the refrigeration branch pipe and the refrigerant main pipe are fixedly screwed up by installing two hoops between the refrigeration cold supply pipe joint, the refrigeration branch pipe and the steering U-shaped pipe and between the refrigeration branch pipe and the refrigerant main pipe refrigeration cold return pipe joint, the end part of the U-shaped pipe is fixed with the ground ring beam, and the refrigeration branch pipe is bound and fixed with the refrigeration branch pipe support.

S5, carrying out pressure test and pressure maintaining on the main refrigerant pipe and the refrigeration branch pipes connected in series;

and (3) pressure testing: after the installation, a pressure test is carried out, wherein the pressure of the pressure test needs to be kept at 0.35Mpa, and the pressure test time is 48 hours. And carrying out the next procedure after the pressure test is qualified. And a temperature sensor is installed according to a design drawing.

S6, paving temperature transfer layers at the upper end of the film, at the periphery of the main refrigerant pipeline and at the periphery of the refrigeration branch pipeline in the step S3;

and S7, performing ice layer construction on the temperature transmission layer.

Laying a temperature transfer layer: in the process of paving sand, the pressure of 0.35Mpa is kept in the main refrigerant pipeline and the refrigeration branch pipeline. Sieving river sand, removing impurities in the sand, paving the sand within 50mm in the whole ice field range, compacting and paving the sand, wherein the flatness is +/-5 mm, and the compactness reaches 0.94. And then, starting refrigeration equipment, uniformly spraying and wetting the sand layer of the whole ice field by using a manual water pipe (a spray head is horizontally dispersed without impacting the sand layer) under the condition that the sand layer is not frozen, then returning to spray water again to thoroughly pour the whole sand layer, so that the sand layer and the refrigeration branch pipe are combined compactly, manually tamping the sand layer of the main pipe ditch after thorough pouring, and timely replenishing, watering and wetting sand and leveling the settled sand layer.

The construction method of the ice layer in the step 7 comprises the following steps: a1, cleaning sundries on the temperature transfer layer;

sundries cleaning: and timely cleaning up the foam and light impurities floating on the sand layer.

A2, cooling the temperature transfer layer by filling a refrigeration medium into the main refrigerant pipeline;

a3, sprinkling water for many times on the temperature transfer layer for cooling to make ice to form a first ice layer, wherein the thickness of each sprinkling is not higher than 1mm, and the time interval of each sprinkling is not lower than 2 hours;

if people can sink when walking on the sand layer, the sand layer is gradually hardened along with the temperature reduction, and water should be sprayed in time. The water spraying amount needs to reach the water saturation of the sand, the sand on the surface layer is naturally settled and leveled, no water is accumulated on the surface or extremely shallow clear water exists in a small area, and the unevenness is timely repaired (sand filling or scraping). After which it was kept frozen with a flatness of + -5 mm. And after the sand layer reaches-5 ℃, performing first-layer watering ice making. Spraying extremely thin water mist mechanically or manually for two times, wherein the spraying thickness of each layer is 1 mm. The water mist is quickly condensed into a first layer of ice after being sprayed out. After 2 hours of sprinkling water, when the ice layer is frozen to be white, sprinkling water for the second time to form a first common ice layer about 2 mm. The flatness is +/-3 mm. At this time, the temperature of the sand layer should be adjusted to-7 ℃ and the surface layer temperature should reach-5 ℃. And spraying water mist for multiple times to form an ice layer, and making ice circularly. The quality problems of softening of an indoor ice layer and incompact freezing of the ice layer are prevented, and the comfort degree of the ice surface in exercise is effectively improved.

A4, performing ice paint layer construction on the first ice layer;

and (3) construction of an ice paint layer: the first white water-based ice paint is uniformly sprayed by a plurality of spray heads in parallel by 0.5mm, the second white water-based ice paint is uniformly sprayed by 0.5mm after the ice is formed and frozen, and then the ice is sprayed for the third time and repaired to reach the condition that the whole ice field is white from all angles and has uniform and consistent color, so that a high-quality ice paint layer is formed. After the ice paint layer is frozen, spraying ice for two times to form a 2mm protective layer which plays a role in sealing and protecting the ice paint layer.

And A5, spraying water on the ice paint layer for multiple times to make ice to form a second ice layer.

Match marking and other spray and protective layers: after the protective layer of ice freezes, the ice hockey game indicia, such as demarcations, goal areas, starting points and circle areas, and the name and logo of the sponsor's organization, are sprayed. After the marks and logos are dried (or the grid cloth Logo is frozen and stuck on the ice layer), a layer of mark and Logo ice layer protective layer is manufactured first, and then the second ice layer is manufactured step by step in batches to serve as a working layer.

Polishing the working layer surface layer: the ice surface temperature is always controlled to be minus 3 to 5 ℃. The thickness of the ice layer is about 40mm, the manufacturing process follows thin water spraying, and the temperature inside and outside the ice surface is consistent. After the ice surface is made, the ice surface is polished to be flat and smooth by an ice grinder.

And A6, arranging a cold radiation protection wall at the periphery of the second ice layer.

Cold radiation protection walls (additionally provided with protection glass) are arranged around the ice rink, so that the energy-saving effect is obvious. The periphery of the ice rink is low-radiation, so that decoration and boundary walls with radiation heating rate can be reduced, and heat radiation from the outside is reduced.

A construction method of an energy-saving artificial ice rink ground effectively solves the problems that the integrity of the bearing capacity of an energy-saving self-control ice ground construction foundation is insufficient, when the ice ground is frozen, large internal stress can be generated, outward thrust can be generated to a surrounding retaining wall, the edge of an ice body on the ice surface is easy to crack in an expansibility manner in the ice making process, so that the edge of the ice surface is damaged, fine cracks are easy to generate in one-time construction of an ultrathin concrete foundation under the ice surface, and the temperature control of the ice body on the ice surface is difficult. The invention effectively solves the quality problems of softening and untimely freezing of the ice layer of the indoor ice and snow sports project by repeated circulating ice making, and effectively improves the sports comfort degree of the ice surface; the main pipeline ditch is arranged at the lower side of the ice surface in the ice rink, so that the energy loss is effectively reduced, the heat preservation measures of the main pipeline outside the ice rink are reduced, the field is utilized to the maximum extent, and the daily electricity consumption for maintaining the operation of the stadium is saved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A construction method of an energy-saving artificial ice rink ground is characterized in that: comprises the following steps of (a) carrying out,

s1, digging a foundation pit of the ice ground foundation, backfilling the foundation pit after digging the foundation pit, compacting to form a backfill soil layer, paving a mortar gravel layer on the backfill soil layer, and constructing an ice ground cushion layer on the mortar gravel layer;

s2, constructing a ground ring beam and a ring road on the ice ground cushion layer in the step S1, performing waterproof and anti-cracking treatment on the ice ground cushion layer and the ground ring beam and the ring road on the ice ground cushion layer, and paving a leveling layer on the ice ground cushion layer subjected to the waterproof and anti-cracking treatment to complete the ice ground foundation construction;

s3, placing a main refrigerant pipeline on the ice ground foundation in the step S2, and sequentially laying a heat insulation board and a film on the ice ground foundation;

s4, sequentially installing a refrigeration branch pipe support and a refrigeration branch pipe on the basis of the ice ground, and connecting the refrigeration branch pipe and the main refrigerant pipe in the step S3 in series in a sealing manner;

s5, carrying out pressure test and pressure maintaining on the main refrigerant pipe and the refrigeration branch pipes connected in series;

s6, paving temperature transfer layers at the upper end of the film, at the periphery of the main refrigerant pipeline and at the periphery of the refrigeration branch pipeline in the step S3;

and S7, performing ice layer construction on the temperature transmission layer.

2. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: in the step S1, the maximum grain diameter of the backfill soil particles is not more than 5mm, and multiple times of backfill soil operation are carried out, wherein the virtual paving thickness of the backfill soil is not more than 250mm each time, the tamping thickness is not more than 200mm, and the compaction coefficient of a backfill soil layer is not less than 0.94.

3. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: and step S1, paving broken stone on the backfill soil layer, stabilizing the broken stone to form a broken stone layer, immediately filling mortar into the broken stone layer, filling the mortar into the holes among the broken stones, and after the mortar filling is finished, fully vibrating by using a flat plate vibrator, wherein the overlapping of the vibrating and tamping is 10-20 cm, and the vibrating and tamping time is not less than 30 seconds when the vibrating and tamping is carried out at the same position.

4. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: the ground ring beam and the loop are integrally cast and formed, and the temperature transmission layer is positioned on the inner ring of the loop.

5. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: in the step S4, sealing glue is applied to the inlet and outlet ports of the main refrigerant pipe, the length of the applied sealing glue is not less than 150mm, the effective connection length between the branch inlet and outlet pipes of the main refrigerant pipe and the refrigeration branch pipe is not less than 150mm, and a fixing clamp is sleeved on the periphery of each port of the refrigeration branch pipe.

6. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: when the temperature transfer layer is laid in step S6, the pressure in the main refrigerant pipe and the refrigeration branch pipe should be maintained at not less than 0.2 Mpa.

7. The construction method of the energy-saving artificial ice rink ground according to claim 1, characterized in that: the construction method of the ice layer in the step 7 comprises the following steps:

a1, cleaning sundries on the temperature transfer layer;

a2, cooling the temperature transfer layer by filling a refrigeration medium into the main refrigerant pipeline;

a3, sprinkling water for many times on the temperature transfer layer for cooling to make ice to form a first ice layer, wherein the thickness of each sprinkling is not higher than 1mm, and the time interval of each sprinkling is not lower than 2 hours;

a4, performing ice paint layer construction on the first ice layer;

and A5, spraying water on the ice paint layer for multiple times to make ice to form a second ice layer.