Quality control measures for curtain wall engineering?

Quality control measures of curtain wall engineering are very important. Knowing the measures can better solve practical problems, and every detail should be handled with professional knowledge. Zhong Da Consulting will introduce the quality control measures of curtain wall project.

The common quality defects of curtain wall mainly include: (1) the water tightness and air tightness of curtain wall system do not meet the requirements (structural water leakage and air leakage); (2) Installation accuracy of vertical and horizontal frames; (3) vibration and noise; (4) the material does not meet the requirements; (5) Quality problems of facing, etc.

Cause analysis and preventive measures

The water tightness and air tightness of curtain wall system do not meet the requirements.

cause analysis

(1) unreasonable structural design of curtain wall system, unreasonable joint design and unreasonable plate structure design;

(2) The materials used are unqualified;

(3) The processing precision and quality control of the material factory are not strict;

(4) The site installation quality is not good, the construction technology is unreasonable, the process method is improper, and it is caused by human factors.

Preventive and control measures

(1) In the scheme design, the choice of water-proof scheme and waterproof material is emphatically studied, and the design scheme is optimized;

(2) When deepening the design, strictly review the waterproof nodes and strictly control them.

(3) Do a good job in technical disclosure and strictly implement the management of construction samples;

(4) Strengthen the acceptance and quality control of the incoming materials;

(5) Construction measures and installation technology should be scientific and reasonable;

(6) Take cover engineering acceptance and special acceptance records of each part.

Installation accuracy of horizontal and vertical frames

cause analysis

(1) measuring unreeling error;

(2) The installation and positioning of the reference layer are inaccurate;

(3) The connection with the main body is out of tolerance or the accumulated error is out of tolerance;

(4) The connection between mullions is out of tolerance or the accumulated error is out of tolerance;

(5) The connection between vertical frame and horizontal frame is out of tolerance or the error is out of tolerance.

Preventive and control measures

(1) Make a reasonable setting-out plan and control the setting-out accuracy;

(2) Control the installation quality and choose a reputable construction team and curtain wall management team.

Vibration and noise

cause analysis

(1) The structural design of curtain wall system is unreasonable (the partition of window or opening fan is too large, there are few locking points, the section size of curtain wall profile is small, and the wall thickness is thin);

(2) Improper site installation process and wrong process lead to material shortage;

(3) The installation management is not in place, and the installation quality is unqualified (the repair quality of interlayer seal is not good, there is no glue at the expansion joint of mullion, there is no glue between adapter and mullion and transverse frame, there is a gap between adapter and mullion or installation, there is a lack of pad between glass and frame, and there is a lack of pad in stone curtain wall, etc. ).

Preventive and control measures

(1) Choose a reputable curtain wall project management team when bidding;

(2) Optimize the design scheme (reduce or make the turn-on fan smaller and increase the hardware lock point);

(3) Find out the quality problems of construction technology through the construction template, strictly control the quality standards and strengthen the inspection and acceptance of installation quality.

The material does not meet the requirements.

cause analysis

(1) When bidding for design, the positioning of materials is vague, so you can drill if you have them;

(2) The curtain wall manufacturer fails to process brand materials according to the contract, or lowers the technical standards, and fails to process purchased materials according to the requirements of specifications and drawings;

(3) Secondary damage caused by lax material transportation and site management;

(4) Material sample submission and approach acceptance management is not in place.

Preventive and control measures

(1) Strictly control the bidding, write down the technical requirements, strictly limit the brand of materials, and do a good job in bidding evaluation;

(2) To avoid the construction unit from lowering the standard technically, and to strictly examine the drawings when deepening the design, and to clearly indicate the model, specification, configuration and composition of the materials;

(3) Do a good job of sample submission and material confirmation in the bidding process;

(4) Strengthen the quality inspection, inspection and acceptance of incoming materials, and do a good job in the quality inspection and acceptance of materials during construction.

The quality problems of facing include: uneven facing, wave reflection, lax sealing and gluing, lack of edges and corners of stone, color difference of facing, etc. Each one is related to other common curtain wall quality problems. For example, the quality of caulking and gluing directly affects the air tightness and water tightness of curtain wall, and the uneven finish and wave reflection directly affect the architectural effect.

Uneven finish and wave reflection

cause analysis

(1) The processing precision and quality of the factory are not strictly controlled, and the facing material itself is uneven, with out-of-tolerance flatness.

(2) Late deformation that is difficult to eliminate: stress deformation of aluminum plate, deformation caused by lattice creep of stone, uneven reflection caused by waves caused by toughened glass and other materials;

(3) On-site installation quality, installation accuracy of horizontal and vertical frames, inaccurate installation and positioning of facing, and insufficient pressing force.

Preventive and control measures

(1) When designing the scheme and deepening the design, the frame size should be reasonably reduced to make the material size uniform and reduce the difficulty of processing and installation; (2) Manage the transportation, storage and installation of materials; (3) Strictly implement the construction template first, and strengthen the on-site quality inspection and acceptance.

Quality problems of sealing and gluing

cause analysis

(1) The distance and flatness between decorative panels are not good, which affects the width of glue joint; (2) The installation accuracy of vertical and horizontal frames is not good, which directly affects the quality of the width of veneer glue joint; (3) The joint is not filled with foam strips or the foam strips do not match the joint width, which affects the width of the glue joint. prevent and cure

In case of error 2( 1), the construction template system shall be implemented first, and the rubber workers shall be trained and assessed before taking up their posts; (2) Control the installation quality and strengthen the quality inspection and acceptance; (3) Choose a reputable construction team and curtain wall management team.

The stone lacks edges and corners.

Primitive cause

1( 1) stone processing design or installation scheme analysis is unreasonable and easy to be damaged; (2) The factory inspection is not strictly controlled, the packaging method is wrong or the factory transportation and storage are improper; (3) Installation management is not in place, improper storage and handling, or collision and damage during installation.

prevent and cure

Measure 2( 1) Optimize the design scheme, try to choose high-strength stone with a design thickness of not less than 30mm(2) Supervise in the factory and release it from the factory; During transportation, on-site storage and installation of stone materials, handle them with care, and the bottom of stone materials can be padded with cork to avoid falling off.

Decorative chromatic aberration

Primitive cause

1( 1) The ex-factory quality of materials is not good, and stone processing is not pre-arranged; (2) Materials are processed in batches (glass is not in the same heat number, aluminum plate is not sprayed and deformed in the same batch, and stone is not in the same vein); (3) Material deformation in the later period, poor flatness of decorative board, uneven glass backing and inadequate installation management.

prevent and cure

Measure 2 (1) supervise the manufacturing in the factory, do a good job of pre-arranging the stone plates of the factory, and make the asbestos be ordered and processed at one time through the factory; (2) Reduce the ordering batch of aluminum plates, reduce the impact of spraying, shorten the installation period as much as possible, and reduce the impact of oxidation and fading; (3) Try to limit the glass manufacturers with good technical ability, try to process the original glass once, and control the quality of deep processing of glass; (4) Strengthen the quality inspection and acceptance of materials before entering the site and installation, and try to do a good job of pre-arranging boards at the stone site.

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