Construction Preparation
Material Preparation: Select geotextiles of appropriate specifications. Generally, they are required to have good anti-seepage performance, corrosion resistance, and a certain degree of strength. At the same time, prepare supporting adhesives or welding materials, etc.
Construction Equipment: Prepare special equipment for laying geotextiles, such as laying machines, welding machines, etc., as well as cutting tools, testing equipment, etc.
Site Cleaning: Before construction, clean up sundries, sharp objects, etc. on the garage floor and surrounding areas to ensure that the floor is flat and there are no obvious unevenness, cracks and other defects. If there are pollutants such as oil stains on the floor, thorough cleaning is required.
Laying of Geotextiles
Laying Direction: Determine the laying direction of the geotextiles according to factors such as the shape of the garage and the direction of water flow. Generally speaking, the long side of the geotextile should be perpendicular to the direction of water flow as much as possible to reduce the scouring of the water flow on the geotextile.
Unfolding and Laying: Slowly unfold the geotextile from one end. During the laying process, pay attention to avoiding phenomena such as wrinkles and twists of the geotextile. It can be laid manually or mechanically to ensure that the geotextile is closely attached to the ground.
Lap Treatment: Adjacent geotextiles need to be lapped, and the lap width is generally not less than 100mm. For projects with special requirements, the lap width may need to be appropriately increased. The lap joints should be connected by means of adhesives or welding to ensure a firm connection and no water leakage. When using adhesives, apply and compact them according to the requirements of the product instruction manual; when using welding, control the welding temperature and speed to ensure the welding quality.
Detail Treatment
Corner Treatment: The geotextile needs special treatment at the corner parts of the garage. Generally, the geotextile is cut into a suitable shape and then folded and fixed to ensure the anti-seepage effect at the corners. Sealant and other materials can be used to seal the corners to further improve the anti-seepage performance.
Treatment around Pipes: For the parts where drainage pipes, ventilation pipes, etc. in the garage pass through the geotextile, appropriate holes should be reserved around the pipes first, and then the
geotextile should be tightly wrapped around the pipes and sealed with sealing materials. Rubber
sealing rings, sealant putty and other materials can be used to ensure that there is no water leakage
at the connection between the pipes and the geotextile.
Quality Inspection
Appearance Inspection: After the construction is completed, first inspect the laying appearance of the geotextile to check for any damage, wrinkles, loose lap joints, etc. If any problems are found, repairs or rectifications should be carried out in a timely manner.
Sealing Inspection: Use methods such as water injection tests or air pressure tests to detect the
anti-seepage performance of the geotextile. Select a certain number of detection points in the garage,
inject water or fill a certain pressure of gas into the garage, and observe whether there is any leakage of
the geotextile. If leakage is found, promptly find the leakage point and repair it.
Strength Inspection: Test the tensile strength, tear strength, etc. of the geotextile to ensure that the performance of the geotextile meets the design requirements. Sampling inspection can be used,
and the sampled geotextile samples can be sent to a professional testing institution for testing.
Finished Product Protection
Avoid Mechanical Damage: During the subsequent construction process, avoid rolling and scratching
the geotextile by construction machinery, vehicles, etc. If other operations need to be carried out on
the geotextile, protective measures such as laying wooden boards should be taken.
Prevent Man-made Damage: Set up warning signs to prohibit irrelevant personnel from entering
the construction area to prevent man-made trampling and damage to the geotextile. At the same time,
strengthen the education of construction personnel to improve their awareness of finished
product protection.
Provide Cover Protection: If the next step of construction cannot be carried out immediately after
the geotextile is laid, cover and protect the geotextile with materials such as plastic sheeting and straw
mats to prevent damage to the geotextile caused by direct sunlight, rainwater scouring, etc.
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