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Control method for forming flatness of sprayed concrete curved surface of large-span spherical dome

A shotcrete and curved surface forming technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve the problems that it is difficult to effectively ensure the smoothness of the shotcrete curved surface of large-span domes, so as to improve the utilization rate of materials and improve the quality of projects , The effect of precise construction

Pending Publication Date: 2022-05-17
CHINA TIESIJU CIVIL ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of no arch reference, these measures are still difficult to effectively ensure the flatness of the large-span dome sprayed concrete surface. Therefore, using the existing conditions on site, a convenient, simple and effective long-span spherical It is very necessary to control the flatness of the shotcrete surface of the dome

Method used

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  • Control method for forming flatness of sprayed concrete curved surface of large-span spherical dome
  • Control method for forming flatness of sprayed concrete curved surface of large-span spherical dome
  • Control method for forming flatness of sprayed concrete curved surface of large-span spherical dome

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Embodiment 1

[0036] Embodiment 1: A method for controlling the flatness of the sprayed concrete curved surface of a large-span spherical dome, which includes the following steps:

[0037] Step 1, planning and designing the position of each part of the dome curved surface control network, calculating the absolute coordinates of each position, according to the actual engineering, with the dome as the center, designing the position distribution of the circumferential reinforcement 1 and the intersection nodes with the radial reinforcement 2;

[0038] Step 2. Select steel bars and other construction tools, start construction according to the design plan, and use the total station to carry out lofting and layout;

[0039] Step 3. Using the steel bar as the basic material and the center of the dome as the reference, lay out the circular steel bar 1 from the inside out and connect it with the radial steel bar 2 to form a cobweb-like full-cover shotcrete control network. The radial steel bar 2 and ...

Embodiment 2

[0049] Embodiment 2: A method for controlling the flatness of the sprayed concrete curved surface of a large-span spherical dome, which includes the following steps:

[0050] Step 1, planning and designing the position of each part of the dome curved surface control network, calculating the absolute coordinates of each position, according to the actual engineering, with the dome as the center, designing the position distribution of the circumferential reinforcement 1 and the intersection nodes with the radial reinforcement 2;

[0051] Step 2. Select steel bars and other construction tools, start construction according to the design plan, and use the total station to carry out lofting and layout;

[0052] Step 3. Using the steel bar as the basic material and the center of the dome as the reference, lay out the circular steel bar 1 from the inside out and connect it with the radial steel bar 2 to form a cobweb-like full-cover shotcrete control network. The radial steel bar 2 and ...

Embodiment 3

[0062] Embodiment 3: A method for controlling the smoothness of the sprayed concrete curved surface of a large-span spherical dome, which includes the following steps:

[0063] Step 1, planning and designing the position of each part of the dome curved surface control network, calculating the absolute coordinates of each position, according to the actual engineering, with the dome as the center, designing the position distribution of the circumferential reinforcement 1 and the intersection nodes with the radial reinforcement 2;

[0064] Step 2. Select steel bars and other construction tools, start construction according to the design plan, and use the total station to carry out lofting and layout;

[0065] Step 3. Using the steel bar as the basic material and the center of the dome as the reference, lay out the circular steel bar 1 from the inside out and connect it with the radial steel bar 2 to form a cobweb-like full-cover shotcrete control network. The radial steel bar 2 an...

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Abstract

The invention discloses a method for controlling the forming flatness of a sprayed concrete curved surface of a large-span spherical dome. The method comprises the following steps that firstly, distribution of all work points of the curved surface of the dome is designed; step 2, lofting and point distribution; step 3, by taking the dome as the center, arranging steel bars of annular concentric circles, and then radially connecting to form a cobweb type full-coverage sprayed concrete control net; 4, spraying the sprayed concrete; and 5, maintenance and follow-up work are carried out. The method has the beneficial effects that the defects in the field of a large-span hyperboloid spherical dome sprayed concrete curved surface forming flatness control method are overcome; the material utilization rate can be effectively improved, the engineering economy is improved, and meanwhile precise construction can be achieved; the steel bars are used as basic materials for control net design, and compared with a traditional arch frame, the arch frame has extremely high adaptability and flexibility and can better adapt to various shotcrete working faces, and the construction efficiency is effectively improved.

Description

technical field [0001] The invention relates to a method for controlling the flatness of the sprayed concrete curved surface of a large-span spherical dome, in particular to a method for controlling the flatness of the curved surface of the sprayed concrete curved surface of a large-span hyperbolic spherical dome without an arch reference, and belongs to the technical field of building construction. Background technique [0002] Shotcrete construction, as a commonly used construction method in today's engineering construction, has the advantages of timely support, good support quality, labor saving, simple operation, and great construction flexibility, but its flatness is not easy to control, especially for curved surface forming. The flatness of shotcrete is more difficult to control. Poor flatness will not only affect the aesthetic appearance, but also affect the laying of waterproof boards in the later stage, resulting in voids in the lining and affecting the quality of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/107Y02E10/20
Inventor 付立宏戴国安宋忠爽刘帅涛洪文金张耘豪王贤敏
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD