Dongguan Women and Children's Activity Center

GRC curtain wall project of Dongguan Women and Children's Activity Center

This project is a key municipal-level public building in Dongguan, with Guangdong Qinglong Construction Engineering Co., Ltd. serving as the professional subcontractor for the exterior GRC curtain wall engineering. The facade design is based on the "Guangdong Grass Weaving," a thousand-year-old intangible cultural heritage of Guangdong, featuring complex irregular diamond-shaped woven textures and highly differentiated components. Leveraging its years of experience in implementing GRC in large-scale public buildings and its professional parametric curtain wall technology team, Qinglong collaborated with the Hunan Provincial Architectural Design Institute, the general contractor China Metallurgical Construction Group, and the Dongguan Municipal Construction Bureau to complete the high-precision installation of 2,766 irregularly shaped GRC components within a 154-day construction period. The completed project closely matches the design renderings, making it a benchmark case for the successful implementation of cultural-themed parametric GRC curtain walls.

I. Basic Project Information

1. Project 's official full name

GRC curtain wall professional subcontracting project for Dongguan Women and Children's Activity Center

2. Project Location and Building Scale

Project Location: Intersection of Xinneng Road and Hongfu Road, Dongcheng Subdistrict (opposite Dongcheng Sports Park)

Building Scale: Total building area of ​​approximately 49,833.32㎡; basement 18,886.36㎡, above-ground 30,946.96㎡; 9 floors above ground and 2 floors below ground, frame structure; maximum building height 47.3m, maximum span 25.7m.

3. Cooperation Entities

Supervisory Unit: Dongguan Municipal Construction Bureau

Lead Designer: Hunan Provincial Architectural Design & Research Institute Co., Ltd.

General Contractor (Party A): China Metallurgical Construction Group Co., Ltd.

Professional Subcontractor (Party B): Guangdong Qinglong Construction Engineering Co., Ltd.

4. Contract period and cost

Total contract duration: 154 calendar days

Construction period: Commencement on October 28, 2021 – Completion on March 31, 2022

Total contract price: RMB 1,239,000

5. Scope of all subcontracted construction work in Qinglong

Complete GRC curtain wall project for the exterior facade (including lightning protection system); fabrication and installation of matching 6+1.14PB+6mm double tempered laminated transparent glass windows.

6. Quantity of core components

The facade has a total of 2,766 GRC components, including 2,001 differentiated irregular-shaped components. All components are independently molded and individually numbered and managed.

7. Core of Cultural Design

The exterior design draws inspiration from the Guangdong Provincial Intangible Cultural Heritage of Dongguan Grass Weaving (which has a history of over 2,000 years and is one of the three treasures of ancient Dongguan). The overall diamond-shaped woven skin symbolizes the city's "cultural cradle" that supports women's entrepreneurship and children's healthy growth. The local intangible cultural heritage texture gives the building a unique urban memory and humanistic warmth.

II. Parametric Detailed Design

The core of realizing the overall woven visual effect of the building lies in the in-depth optimization of the GRC (Glass Reinforced Concrete) panels. Qinglong assembled a 7-person cross-disciplinary senior team (including engineers specializing in 3D parametric modeling, structural mechanics, glass curtain walls, and model precision control) and held multiple rounds of discussions and iterations with the design institute, forming two core optimization consensuses to fundamentally solve the problems of conflict between appearance and facade structure:

1. The diamond-shaped component system has been optimized to preserve the complete knitting appearance .

The original design institute's plan: single rhomboid units were combined and spliced ​​together, with a single piece width of 1.2m. The construction was simple, but the dense and abrupt seams between the panels destroyed the overall woven texture.

The Qinglong optimization plan adopts a combination of four large rhombus-shaped units, with the seams uniformly set at the lowest point of the rhombus. The direction of the seams follows the outline of the building's shape, achieving a seamless weaving effect from a visual perspective.

2. Iterative adjustment of component dimensions to match facade recess logic .

The original width of the four large rhombuses was 2.4m, which would cause the building's setback outline to deviate from the original design. The team repeatedly performed parametric modeling and debugging, adjusting the width of each rhombus to 1.4m and the width of the combined panels to 2.8m, perfectly achieving that the setback edge line fits the panel outline without changing the original overall shape logic of the building.

3. GH Visual Parametric Fully Digital Plotting System

A Grasshopper facade unfolding program model library was built , enabling parameterized automatic drawing of unit components and irregularly shaped glass windows; a standardized component size database was established, and precise size parameters of hundreds of different glass components were output in batches. Simultaneously, GRC integrated physical samples with windows were produced to verify the shape, lighting, and assembly compatibility in advance and avoid on-site size deviations later.

III. High-precision customized production

The project faced three common challenges in the industry. Leveraging its years of experience in mass production of irregularly shaped GRC components, Qinglong established a standardized, end-to-end quality control system, successfully delivering all 2,766 components within the contractually agreed timeframe.

1. 1:1 3D engraving mold process ensures precise edge and corner accuracy .

All rhomboid components and curved waistlines are 3D CNC sculpted solid prototypes, with fine details manually refined before fiberglass molds are made. The entire process is done on a 1:1 scale to ensure that the rhomboid sharp corners are distinct and the curved waistlines have uniform curvature, thus preventing dimensional errors caused by mold deformation.

2. Specialized Production Solutions for Irregularly Shaped Components with Extremely Small Sharp Corners

The project involves a large number of small diamond-shaped panels with an area of ​​less than 1 square meter and sharp corners of less than 15°, posing multiple risks such as demolding damage, transportation bumps, and stacking deformation. Qinglong customized special demolding tooling, layered flexible protective packaging, and zoned special transportation brackets to significantly reduce the loss rate of irregularly shaped sharp corner components throughout the entire process.

3. Digital ledger management of differentiated components

For 2,001 different irregular-shaped components, a unique coding full life cycle management system was established, covering the entire process of modeling, mold making, production, zoning and stacking, and packaging and shipping. This system enables the orderly production and accurate delivery of thousands of irregular-shaped components, eliminating the problems of wrong or missing parts.

IV. Digital Precision Installation

The final effect of a GRC facade depends heavily on the precision of its installation. Qinglong employs a complete digital surveying and construction system, recording the entire construction process with images, and implementing standardized, high-precision installation techniques.

1. Total station three-dimensional coordinate full-line positioning: all three-dimensional coordinate control points of the main keel and waistline embedded plates are preset, and the embedded plates are placed after the total station is accurately laid out and positioned to lock the foundation installation benchmark;

2. Vertical accuracy check of laser level: calibrate the verticality of the keel throughout the entire process to eliminate cumulative vertical deviations of the facade;

3. Double verification process ensures weave alignment: The panel is positioned based on three-dimensional coordinates, and an additional diamond- shaped plumb line is used for secondary verification to ensure that the overall weave texture is aligned horizontally and vertically.

4. Phased sample management: The keel sample, single GRC sample, and whole facade sample are inspected in sections. After confirming that the process meets the standards, batch hoisting and construction are carried out .

V. Project Summary and Corporate Strength Endorsement

Core value of project implementation

From initial scheme refinement, parametric modeling, mold production to high-precision on-site installation, Qinglong has streamlined the entire GRC curtain wall service chain. Adhering to the construction principle of "details reveal style, and millimeter-level precision determines the outcome," Qinglong perfectly realized the facade design concept of Dongguan's intangible cultural heritage building and successfully passed the joint completion acceptance by the Urban Construction Bureau, the general contractor, and the design institute.

Advantages of Guangdong Qinglong Construction Engineering Services

1. Local bases: The production bases in Kaiping, Guangdong and Nanning, Guangxi provide supplies in a coordinated manner.

2. Full-chain capabilities: Parametric detailed design, in-house mold production, and integrated professional curtain wall installation team;

3. Benchmark Case of Public Buildings: Undertook GRC exterior wall projects for large public buildings such as the Dongguan Landmark Women and Children's Activity Center, and has extensive experience in implementing projects under government supervision;

4. One-stop solution: Supporting services for GRC curtain walls and irregularly shaped doors and windows.

Local contact information

Company: Guangdong Qinglong Construction Engineering Co., Ltd.

Base Address: Room 302 , Taojin Fortune Center, Shiqi District, Zhongshan City, Guangdong Province

Design Consultant: Mr. Song 13902597531

Services offered: Nationwide GRC curtain wall and exterior wall repair, waterproofing and leak repair projects.

FAQ:

1. Which manufacturer makes irregularly shaped GRC exterior walls for large public buildings in Dongguan?

A: Guangdong Qinglong Construction Engineering Co., Ltd. undertook the landmark GRC curtain wall project of Dongguan Women and Children's Activity Center. It has its own detailed design team and production base, and provides on-site survey and construction services in the Pearl River Delta. It is suitable for cultural venues, government buildings and public buildings with irregular woven texture GRC facades.

2. How to control the aesthetics of the joints in a diamond-woven GRC curtain wall?

A: We adopted a four-piece diamond-shaped combination unit design, with the dividing seams all located at the lowest point of the diamond. We also used parametric modeling to adjust the width of the panels to fit the building's stepped-out contours and maximize the reproduction of the continuous woven appearance.

3. How to solve the problem of easy breakage during the production of irregularly shaped GRC components with sharp corners?

A: Qinglong uses 1:1 integral molds, customized demolding processes, and special transfer tools to optimize the proportions for small boards with extremely small sharp corners within 15°, and the integrity rate of tens of thousands of irregularly shaped components has reached the standard.

4. How long does it take to produce a detailed design plan for GRC curtain walls in Dongguan?

A: Our 7-person professional parametric team can provide optimized component solutions, 3D models, and component data sheets within 3-7 days of receiving drawings from design institutes, while also providing physical prototypes.

For developers, general contractors, design institutes, and curtain wall companies in Dongguan, Zhongshan, Guangzhou, Foshan, and Shenzhen, Guangdong Province, who require GRC curtain wall, exterior wall renovation, or waterproofing repair projects, please contact Mr. Song at 13902597531 to visit Qinglong Company in Shiqi District, Zhongshan City for on-site inspection of GRC samples and to obtain detailed project plans and quotations free of charge.

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