A method for controlling the appearance quality of concrete of a circular truncated cone structure

Abstract

The application provides a concrete appearance quality control method of a circular truncated cone structure type, which comprises the following contents: a first part: a chamfered steel form is arranged at the lower end of an upper cylindrical steel form and connected with a slope surface; a second part: a handle of a single-roller leveling machine is shortened and a suspension fastener is arranged; a third part: the upper cylindrical steel form is suspended and installed by a hanging mode; the handle of the single-roller leveling machine is installed on a taut steel wire for suspending the upper cylindrical steel form through the suspension fastener; a fourth part: concrete paving; concrete pouring of a lower cylindrical steel form is sequentially arranged from inside to outside, the slope surface is continuously paved from top to bottom, and concrete pouring of the upper concrete steel form is arranged from bottom to top; and a fifth part: slope surface concrete finishing; after the slope surface arrangement and finishing are completed, a single-roller leveling machine is operated to perform surface shaping along the slope surface. The method quickly and efficiently completes construction and controls the overall appearance quality of the slope surface concrete surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of concrete construction, in particular, a kind of concrete appearance quality control method of circular platform structure type. BACKGROUND

[0002] Wind power as a clean energy, its influence on the environment is far less than fossil energy, in recent years, under the vigorous promotion of the country has been rapid development.

[0003] At present, the main quality assessment of wind power project is in the equipment manufacturing and construction quality, with increasingly high requirements, the examination of each detail of wind power construction is gradually mentioned.

[0004] Among them, steel tower wind turbine foundation structure as a link of engineering quality has been one of the most concerned problems in the construction process, steel tower wind turbine foundation structure type is mostly gravity type expanded foundation, and the appearance quality of circular platform construction is only controlled by the responsibility and proficiency of workers.

[0005] After consulting the information, no new control technology for concrete appearance quality of gravity type expanded structure type is found. In the conventional construction process, the workers usually control the thickness of concrete paving by arranging a line rope along the edge of the formwork and relying on their intuitive feeling, and the details are handled by manual troweling.

[0006] However, in practice, personnel repeatedly walk on the slope during construction, and the arrangement of line rope is prone to cause safety risks of personnel falling. In order to speed up the foundation pouring construction rate and avoid cold joints of concrete, the slump of slope concrete is often required to be 140-160mm, and the plasticity of the concrete is quickly lost after paving. In addition, the straightness and flatness of the circular platform are not easy to control, which easily causes the concrete appearance quality to not meet the visual requirements.

[0007] In order to improve the appearance quality of wind turbine foundation concrete construction, a new concrete appearance quality control method for circular platform structure type needs to be developed. SUMMARY

[0008] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a circular platform structure type concrete appearance quality control method which can quickly and efficiently complete concrete construction, and greatly improve the flatness, slope and overall appearance quality of the slope concrete surface.

[0009] In order to achieve the above purpose, the technical solution adopted by the present application is as follows: a circular platform structure type concrete appearance quality control method, comprising the following contents:

[0010] First part: mold modification; the circular platform mold includes an upper cylindrical steel mold and a lower cylindrical steel mold, and the lower end of the upper cylindrical steel mold is provided with a chamfer steel mold connected with the slope surface;

[0011] Part II: Modification of the single-roller leveling machine; shorten the handle of the single-roller leveling machine to reduce the overall center of gravity, and configure suspension fasteners;

[0012] Part III: Installation of the mold and the single-roller leveling machine; the upper cylindrical steel mold is suspended by hanging; the handle of the single-roller leveling machine is installed on the tight steel wire rope for hanging the upper cylindrical steel mold through the suspension fastener. Before construction, check whether the suspension height at one end of the single-roller leveling machine is closely attached to the chamfer steel mold and whether the other end is aligned with the upper edge of the lower cylindrical steel mold;

[0013] Part IV: Concrete paving; the concrete of the lower cylindrical steel mold is poured in sequence from the inside to the outside, the slope surface is continuously paved from top to bottom, and the concrete of the upper concrete steel mold is poured from bottom to top; among which, the slope surface needs to be vibrated and replenished after paving;

[0014] Part V: Finishing the concrete on the slope surface; after completing the paving and trimming of the slope surface, operate the single-roller leveling machine to perform surface shaping along the slope surface to achieve the design purpose;

[0015] Finally, cover and maintain until the frustum structure solidifies and forms.

[0016] Preferably, in the first part, the chamfer steel mold is fixed to the upper cylindrical steel mold by bolts.

[0017] Preferably, in the first part, the included angle between the chamfer steel mold and the upper cylindrical steel mold is 45°.

[0018] Preferably, in the first part, during the suspension process of the upper cylindrical steel mold, it is temporarily supported by an "L"-shaped steel bar bracket.

[0019] Preferably, in the second part, the handle of the single-roller leveling machine is changed from an "A"-shaped or "U"-shaped handle to a "field"-shaped handle and the height is reduced to lower the center of gravity of the leveling machine.

[0020] Preferably, in the third part, the upper cylindrical steel mold is fastened and suspended by steel wire ropes and chain hoists, and the handle of the single-roller leveling machine is installed on the steel wire rope for suspending the upper cylindrical steel mold through fasteners.

[0021] Preferably, in the fourth part, during the process of paving the concrete on the slope surface, control the concrete slump within 140mm - 160mm, and evenly spread the concrete material by the cooperation of a pump truck / 布料机 and manual method.

[0022] [[ID=3Q]]Preferably, in the fourth part, during the process of replenishing the material on the slope surface, it is judged whether to distribute or reduce the concrete material during the single vibration process of the single-roller leveling machine to achieve rough leveling.

[0023] Preferably, the material for covering finally is plastic film covering. It should be noted that "布料机" in the original text is not a common English term. You may need to check and correct it according to the actual situation. If it is a specific machine name, it may need to be translated accurately according to the relevant industry or product information. Here, I temporarily keep it in Chinese for the purpose of translation integrity.

[0024] Preferably, the curing process adopts water spraying curing.

[0025] The present application has outstanding substantial features and significant progress compared with the prior art. Specifically, the present application is mainly used in the appearance quality control of the concrete pouring construction of the fan foundation. In the traditional method, the slope surface construction is completed, then a certain time is waited before the construction of the connection part with the upper cylinder is completed, and after the stability is reached, 1-2 hours are further waited before the concrete construction of the upper cylinder is continued. The overall construction efficiency is very low, and the quality of the concrete connection part is poor due to the lack of appearance control means. In the new scheme, the shape of the upper cylinder steel mold is reformed to contain the shape of the connection part, and the new structure of the single roller screed machine is used for suspension construction, so that the construction of the slope surface and the upper cylinder can be continuously carried out, the construction efficiency is greatly improved, and the overall appearance quality is controlled under the constraint of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the construction principle diagram of the concrete appearance quality control method of the circular platform structure type in the present application.

[0027] In the figure: 1. upper cylinder steel mold; 2. handle of single roller screed machine; 3. single roller screed machine; 4. chamfer steel mold; 5. roller; 6. lower cylinder steel mold. DETAILED DESCRIPTION

[0028] The technical scheme of the present application will be further described in detail through specific embodiments.

[0029] As shown in Figure 1 , a concrete appearance quality control method of a circular platform structure type comprises the following contents:

[0030] First part: mold reform; the circular platform mold comprises an upper cylinder steel mold 1 and a lower cylinder steel mold 6, the lower end of the upper cylinder steel mold 1 is provided with a chamfer steel mold 4 connected with the slope surface, the chamfer steel mold is fixed on the upper cylinder steel mold through bolts, and the included angle between the chamfer steel mold and the upper cylinder steel mold is 45°.

[0031] When the upper cylinder steel mold is designed, the lower part is usually processed into a plane to facilitate installation, the 45° inclined surface is processed at the bottom of the steel mold to reduce the waiting time in the pouring process and prevent the concrete from rising at the lower part of the connection part. Since the steel mold is usually manufactured in a splicing manner, one bolt hole is added to each single panel, and one inclined surface steel mold with a width of 20 cm is additionally provided to connect the cylinder steel mold, the contact surface is fixed through ordinary bolts, and the fixing of the entire upper cylinder steel mold is realized.

[0032] During the actual pouring process under the prior art, the concrete at the connection between the steel mold and the slope surface needs to reach a stable state. Usually, after pouring the slope surface, it is necessary to wait for 1 - 2 hours before continuing to pour the concrete of the upper cylinder, which affects the pouring construction rate of the fan foundation, and the appearance quality of the concrete at the connection is poor after demolding.

[0033] Under the new reformed structure, continuous pouring can be achieved, improving the efficiency and ensuring the appearance.

[0034] The second part: the transformation of the single-roller leveling machine 3; the commonly used single-roller leveling machine 3 in the market is mostly used for the flat operation of cast-in-place concrete, which can quickly complete the leveling and vibrating operations on the concrete surface. The leveling machine can select parameters such as power and roller length according to the working surface.

[0035] The thickness control of the concrete paving material is the most difficult for the frustum structure type. If it is necessary to achieve the slope ratio and fix the slope of the working surface of the fixed roller 5 according to the design requirements, the leveling machine needs to be reformed before operation so that the roller 5 can level and vibrate closely along the slope surface according to the unified slope ratio.

[0036] Specifically, shorten the handle of the single-roller leveling machine 3 to reduce the overall center of gravity and configure a suspension fastener; specifically, change the handle 2 of the single-roller leveling machine from an "A" - shaped or "U" - shaped handle to a "field" - shaped handle and reduce the height to lower the center of gravity of the leveling machine.

[0037] The third part: the installation of the mold and the single-roller leveling machine; the upper cylindrical steel mold is suspended and installed in a hanging manner; specifically, when fixing, use an 8# steel wire rope + a chain hoist for fastening. During the suspension process of the upper cylindrical steel mold, it is temporarily supported by an "L" - shaped steel bar support, and the "L" - shaped steel bar support can be temporarily fixed on the ground.

[0038] The handle of the single-roller leveling machine is installed on the tightened steel wire rope suspending the upper cylindrical steel mold through a suspension fastener. Before construction, check whether the suspension height at one end of the single-roller leveling machine is close to the chamfered steel mold and whether the other end is aligned with the upper edge of the lower cylindrical steel mold. No fixing measures are required, and manual control is sufficient.

[0039] The fourth part: concrete paving; the concrete of the lower cylindrical steel mold is poured in sequence from the inside to the outside, and when pouring to the slope surface, it is continuously paved from top to bottom. At this time, the concrete slump is controlled at 140 - 160 mm, and it is evenly spread on the slope surface part by a pump truck / a distributing machine + manual method. The leveling machine first conducts single vibration, and judges whether local feeding needs to be supplemented or the concrete material needs to be reduced through the surface formed by vibration to achieve the purpose of rough leveling.

[0040] The concrete of the upper concrete steel mold is poured from bottom to top.

[0041] The fifth part: after the local modification of the slope surface is completed, the single roller finisher is used to finely vibrate along the slope surface, so that the surface is smooth and the slope ratio of the slope surface meets the design requirements. After the surface is completed, plastic film is covered in time, and watering maintenance work is carried out.

[0042] Finally, cover, maintenance, until the round table structure solidification molding.

[0043] The scheme is mainly applied to the concrete pouring construction of the fan foundation. Compared with the conventional method, the concrete construction can be quickly completed, and the slope surface concrete surface flatness, slope and overall appearance quality are greatly improved, and are unanimously recognized by all parties of construction.

[0044] Finally, it should be noted that: the above has made a detailed description of the preferred embodiments of the patent, but the patent is not limited to the above embodiments, within the knowledge of those skilled in the art, various changes can be made without departing from the purpose of the patent.

Claims

1. A method for controlling the appearance quality of concrete in a frustum structure, characterized in that: It includes the following contents: The first part: Die modification; The frustum die includes an upper cylindrical steel die and a lower cylindrical steel die. A chamfer steel die connected to a slope surface is provided at the lower end of the upper cylindrical steel die; The second part: Modification of the single-roller leveling machine; Shorten the handle of the single-roller leveling machine to reduce the overall center of gravity, and configure a hanging fastener; The third part: Installation of the die and the single-roller leveling machine; The upper cylindrical steel die is suspended and installed in a hanging manner; The handle of the single-roller leveling machine is installed on the taut steel wire rope hanging the upper cylindrical steel die through a hanging fastener. Before construction, check whether the hanging height at one end of the single-roller leveling machine is closely attached to the chamfer steel die and whether the other end is aligned with the upper edge of the lower cylindrical steel die; The fourth part: Concrete paving; The concrete in the lower cylindrical steel die is poured in sequence from the inside to the outside, the slope surface is continuously paved from the top to the bottom, and the concrete in the upper concrete steel die is poured from the bottom to the top; Among them, the slope surface needs to be vibrated and replenished after paving; The fifth part: Finishing the concrete on the slope surface; After the paving and trimming of the slope surface are completed, operate the single-roller leveling machine to perform surface shaping along the slope surface to achieve the design purpose; Finally, cover and maintain until the frustum structure solidifies and forms.

2. The method for controlling the appearance quality of concrete of the truncated cone type according to claim 1, characterized in that: In the first part, the chamfer steel die is fixed to the upper cylindrical steel die by bolts.

3. The method for controlling the appearance quality of concrete of the truncated cone type according to claim 2, characterized in that: In the first part, the included angle between the chamfer steel die and the upper cylindrical steel die is 45°.

4. The method for controlling the appearance quality of concrete of the truncated cone type according to claim 3, characterized in that: In the first part, during the suspension process of the upper cylindrical steel die, it is temporarily supported by an "L"-shaped steel bar bracket.

5. The method for controlling the appearance quality of concrete of the truncated cone type according to claim 4, characterized in that: In the second part, the handle of the single-roller leveling machine is changed from an "A"-shaped or "U"-shaped handle to a "field"-shaped handle and the height is reduced to lower the center of gravity of the leveling machine.

6. The method of controlling the quality of the appearance of concrete of the truncated cone type according to claim 5, characterized in that: In the third part, the upper cylindrical steel die is fastened and suspended by a steel wire rope and a chain block, and the handle of the single-roller leveling machine is installed on the steel wire rope used to suspend the upper cylindrical steel die through a fastener.

7. The method of controlling the quality of the appearance of concrete of the truncated cone type according to claim 6, characterized in that: In the fourth part, during the process of paving the concrete on the slope surface, control the concrete slump within 140mm - 160mm, and evenly spread the concrete material by means of a pump truck / 布料机 in cooperation with manual labor.

8. The method of controlling the quality of the appearance of concrete of the truncated cone type according to claim 7, characterized in that: In the fourth part, the process of replenishing the material on the slope surface is to judge whether to add or reduce the concrete material during the single vibration process of the single-roller leveling machine to achieve rough leveling.

9. The method of controlling the quality of the appearance of concrete of the truncated cone type according to claim 8, characterized in that: The material for the final covering is plastic film covering.

10. The method of controlling the quality of the appearance of concrete of the truncated cone type according to claim 8, characterized in that: ​

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