Tall and large space GRG ceiling steel structure transfer layer installation and strain monitoring method

Abstract

The invention discloses a tall and large space GRG ceiling steel structure transfer layer mounting and strain monitoring method, and aims to solve the problems of mounting and strain monitoring of a tall and large space GRG ceiling steel structure transfer layer. According to factors such as the actual ceiling weight and the arrangement mode, corresponding steel is adopted to design a conversion layer, real-time monitoring is conducted through multiple devices such as an intelligent vibrating wire strain gauge, a total station and a laser scanner, remote monitoring is conducted through a mobile phone APP and a WeChat applet, and accuracy and reliability are ensured. Compared with the prior art, the method effectively solves the problems of stress distribution and monitoring of planar and curved suspended ceilings, and improves the safety and stability of a building.

Description

Technical Field

[0001] The invention relates to the field of building construction installation and monitoring, and in particular to a method for installing a transfer layer of a GRG suspended ceiling steel structure in a large space and for monitoring strain. Background Art

[0002] With the rapid development of my country's economy, competition in the construction industry is becoming increasingly fierce. In order to meet people's demand for architectural beauty and functionality, buildings are becoming taller and more complex. Especially for large spaces such as large hotel banquet halls, the complexity and importance of their structures determine the severity of their safety issues.

[0003] GB 50210-2018 "Quality Acceptance Standard for Building Decoration and Renovation Projects" stipulates: "When the upper part of the suspension rod is a grid, steel roof truss or the suspension rod length is greater than 2500mm, a steel structure transfer layer should be provided." However, since the banquet hall ceiling structure is usually complex and heavy, a steel structure transfer layer is required on the ceiling to disperse and transfer the weight of the ceiling. However, how to effectively install and monitor the safety of these steel structure transfer layers is an urgent problem to be solved in the current construction industry.

[0004] The patent number is CN201110243984.2, which discloses a steel structure transition layer ceiling construction method, the method steps are: A) construction preparation; B) erection of full-floor scaffolding; C) top surface positioning and laying out; D) transition layer production and welding; E) light steel keel gypsum board ceiling.

[0005] The above solution is a relatively conventional process flow, and no plan or monitoring is made for special shaped curved surfaces with special stresses. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that there is no solution and monitoring method for special-shaped curved surfaces with special stress in the prior art, and to propose a method for installing and strain monitoring the transfer layer of a GRG suspended ceiling steel structure in a large space.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a method for installing and strain monitoring a transition layer of a GRG suspended ceiling steel structure in a large space, which adopts the following technical solutions:

[0008] In the flat ceiling area where stress is relatively low, an angle steel system is used to support the steel structure transfer layer;

[0009] In the high-stress curved areas, square steel tubes are used to support the steel structure transfer layer;

[0010] Intelligent vibrating-wire strain gauges are installed in stress concentration areas to carry out real-time monitoring in conjunction with total stations;

[0011] Use a laptop and MIDAS software to process and track monitoring data.

[0012] Preferably, when selecting a steel structure transfer layer support system, factors such as the actual weight of the suspended ceiling and the arrangement of the suspension rods should be considered to select a suitable transfer layer design scheme. For example, for a suspended ceiling weighing more than 10 tons, a double-layer steel structure transfer layer can be used, with the first layer using square steel pipes and the second layer using angle steel; while for a lightweight suspended ceiling, a single-layer steel structure transfer layer can be used.

[0013] Preferably, in the stress monitoring of the curved surface part, not only can the measurement be performed by an intelligent vibrating-wire strain gauge, but also multi-angle and multi-scale stress monitoring can be performed in combination with laser scanners, cameras and other equipment to ensure the accuracy of the monitoring results.

[0014] Preferably, for important stress monitoring points, not only single-point stress gauges can be set, but also networked multi-point stress gauges can be set to achieve all-round monitoring of the stress point. At the same time, the data of multiple monitoring points can be summarized to reduce the error of a single stress point.

[0015] Preferably, for real-time monitoring of stress, not only data processing can be performed through a computer, but also remote monitoring can be performed through mobile phone APP, WeChat applets, etc. to improve work efficiency.

[0016] Compared with the prior art, the present invention provides a method for installing and strain monitoring a transfer layer of a GRG suspended ceiling steel structure in a large space, which has the following beneficial effects:

[0017] 1. For customized flat GRG products, the steel structure transfer layer is set to two layers. The first layer is the galvanized square tube transfer system, and the second layer is the galvanized angle steel transfer system. The flat GRG load is transferred to the steel structure transfer layer through the full-pressure hanger and C60 primary and secondary keels, and then the force is transmitted to the main structure, which reasonably conducts the stress condition of the flat GRG.

[0018] 2. For GRG customized products with curved surfaces, in order to save materials, a first-layer large-space galvanized square tube steel structure transfer layer is designed, and a second-layer small-clearance galvanized square tube steel structure transfer layer is set under the first-layer steel structure transfer layer. For areas with deeper curved surfaces, an additional layer of galvanized angle steel is set to transmit the force layer by layer to the main structure.

[0019] 3. By analyzing the stress characteristics of the GRG ceiling, we can find the measuring points with the largest and most complex stress conditions. By setting up intelligent vibrating-wire unidirectional stress gauges and reflectors, we can understand the stress and displacement of the measuring points, provide timely feedback and warnings, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is the area with large and complex stress in the ceiling diagram (gray part);

[0021] Figure 2 This is the layout diagram of stress-strain monitoring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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.

[0024] Reference Figure 1-2 , a method for installing and strain monitoring a steel structure transition layer in a tall space GRG ceiling, in which the galvanized square tube is fixed to the structural beam through expansion bolts and galvanized angle steel on the curved surface RGR and its surroundings, and the galvanized square tube is fixed to the concrete floor through expansion bolts and galvanized angle steel, and the galvanized square tube is welded to the lower end of the galvanized square tube by setting diagonal braces and welding the galvanized square tube to form a stable first layer of steel structure transition layer, and the galvanized angle steel is set under the galvanized square tube around the curved surface, and the main keel is fixed with nuts, full-thread hangers, hangers, and bolts, and the secondary keel is fixed by hanging parts under the main keel, and the GRG customized product is fixed under the secondary keel by self-tapping screws. In the curved surface part, the galvanized square tube is welded to the lower end of the galvanized square tube, and the galvanized angle steel is welded to the lower end of the galvanized square tube to form the second layer of steel structure transition layer and the steel structure galvanized angle steel additional layer, and finally the curved surface GRG customized product is fixed by fixing the GRG curved surface keel.

[0025] By analyzing Figure 1 and Figure 2 Based on the plane position and facade effect of the middle GRG, six measuring points were finally arranged, from measuring point 1 to measuring point 6 (points 1, 2, 3, 4, 5, and 6 are marked in the figure). The measuring points should be arranged on the galvanized square tube uprights with the highest clearance within the range of the curved GRG, and an intelligent vibrating wire unidirectional stress gauge and a reflector should be installed in the middle of the uprights. A stress gauge data processing point and a total station forced observation pier should be arranged at the inspection port of the steel structure transition layer. The safety of the curved GRG construction can be ensured by analyzing the stress and displacement of the most complex hanger with the largest force.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for installing and strain monitoring a transfer layer of a GRG ceiling steel structure in a large space, characterized in that: The following steps are involved: a) In the flat ceiling area with relatively low stress, an angle steel system is used to support the steel structure transfer layer; b) In the curved surface area where stress is concentrated and high, square steel tubes are used to support the steel structure transfer layer; c) Install intelligent vibrating wire strain gauges in stress concentration areas and cooperate with total stations for real-time monitoring; d) Use a laptop computer and MIDAS software to process and track monitoring data.

2. The method according to claim 1 is characterized in that, when selecting the steel structure transfer layer support system, the transfer layer design scheme is selected according to the actual weight of the ceiling and the arrangement of the hangers.

3. The method according to claim 1 is characterized in that, in the stress monitoring of the curved surface part, measurement is performed by using an intelligent vibrating-wire strain gauge, combined with laser scanners, cameras and other equipment to perform multi-angle and multi-scale stress monitoring to ensure the accuracy of the monitoring results.

4. The method according to claim 1 is characterized in that, for important stress monitoring points, single-point stress gauges and networked multi-point stress gauges are set to achieve all-round monitoring of the stress points; at the same time, the data of multiple monitoring points can be summarized to reduce the error of a single stress point.

5. The method according to claim 1 is characterized in that, unlike claim 1 in which data is processed through a computer, remote monitoring is performed using a mobile phone APP or WeChat applet to improve work efficiency.

6. The method according to claim 1 is characterized in that by analyzing the stress characteristics of the GRG ceiling, 6 to 8 measuring points with the largest and most complex stress conditions are found, and by setting up an intelligent vibrating wire unidirectional stress gauge and a reflector, the stress and displacement conditions of the measuring points are mastered.

7. The method according to claim 2 is characterized in that, for suspended ceilings weighing more than 10 tons, a double-layer steel structure transfer layer is used, the first layer is made of square steel pipes, and the second layer is made of angle steel; while for lightweight suspended ceilings, a single-layer steel structure transfer layer is used.

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