Mobile Toilet Collapse Repair
For the repair of mobile toilet collapses, it is necessary to first determine the cause and scope of the collapse and then formulate a targeted plan, as follows:
If the collapse only involves local damage to the floor tiles or waterproof layer, the repair process should focus on surface restoration. First, clean the damaged area, removing broken tiles, residual adhesives, and debris to ensure a clean base layer. Then, check if the base layer is loose. If there are hollow or soft parts, use tools to remove them down to a solid layer. Next, reapply waterproof coating, covering the damaged area and at least 10 centimeters around it to ensure the continuity of the waterproof layer. After the waterproof layer is completely dry (usually 24-48 hours), lay new tiles that match the original ones, leaving a 1-2 millimeter gap. Finally, fill the gaps with waterproof caulk to prevent water penetration.
If the collapse is caused by a broken pipe leading to ground subsidence, priority should be given to dealing with the concealed work. First, locate the damaged pipe by listening for sounds, observing water stains, or using professional equipment, and then turn off the water supply valve in the corresponding area to cut off the water supply. Next, excavate until the pipe is exposed, cut out the damaged section, and replace it with a new pipe of the same specification. The connections should be sealed using hot-melt or adhesive processes. After repairing the pipe, backfill the soil in layers (each layer not exceeding 20 centimeters in thickness), compacting each layer to a density of over 90% to avoid future subsidence. Finally, deal with the surface layer according to the floor repair process to restore its functionality.
If the collapse involves a large area and affects the wall or structural safety, an immediate safety emergency procedure should be initiated. First, set up warning signs around the toilet to prohibit entry and prevent secondary collapses. Then, contact a qualified professional structural engineer to assess the load-bearing capacity of the walls, the stability of the beams and columns, and the foundation settlement using infrared detection, stress testing, and other methods. Based on the assessment results, if only reinforcement is needed, methods such as carbon fiber cloth pasting or adding support columns can be used. If the structural damage is severe, demolition and reconstruction are required. During construction, strictly follow the requirements of the 'Technical Specifications for Mobile Toilet Construction' to ensure that the new structure meets safety standards such as earthquake resistance and wind resistance.
In addition, during the upgrading and renovation of street-side mobile public toilets in Langfang City, for the issue of squat-position collapses, anti-slip and easy-to-clean floor tiles are uniformly replaced. By increasing the surface friction coefficient, the risk of slipping is reduced. At the same time, a slope design is used to guide water flow to the floor drain, reducing water accumulation on the ground and improving safety in terms of materials and workmanship.
