Construction of Mobile Toilets in Dongchang District

The construction of mobile toilets in Dongchang District should proceed from two aspects: project overview and construction preparation. The specific key points are as follows:

I. Project Overview
The project is located in a densely populated core area of Dongchang District, with plans to build 5 new mobile public toilets, covering a total area of approximately 120 square meters. The toilets are divided into two types:

1. Standard Toilets: There are 3 in total, each covering an area of 20 square meters, equipped with 3 squatting positions for men (including 1 urinal), 4 squatting positions for women, 1 management room, and a hand-washing area.
2. Barrier-Free Toilets: There are 2 in total, each covering an area of 15 square meters, equipped with 1 barrier-free toilet stall, 1 nursing room, and an independent hand-washing area.

Construction must strictly adhere to four national standards, including the 'Design Standard for Urban Public Toilets' (GB/T50157 - 2015), to ensure functionality and safety. The main structure adopts a light steel structure, with galvanized steel pipes (100×50×3mm, 50×50×3mm) welded together. The walls are made of 50mm thick graphite-colored steel composite panels, with inner and outer surfaces of 0.3mm colored steel plates. The floor is laid with 300×300mm non-slip tiles, with two non-slip grooves on the surface. The roof structure consists of a 50mm insulation board + 10mm wood glue board + SBS felt waterproof layer + asphalt shingles. In terms of toilet stall dimensions, standard stalls are ≥1.2m×0.9m, and barrier-free stalls are ≥1.8m×1.5m. The lighting system uses LED induction energy-saving lamps with an illuminance of ≥200LUX. The ventilation system consists of silent exhaust fans with an air exchange rate of ≥3 times per hour. Sewage treatment adopts a flushing system + three-chamber septic tank with an effective volume of 2m³.

II. Construction Preparation

1. Drawing Deepening: Organize technical personnel to draw foundation structure diagrams, pipeline layout diagrams, and equipment installation positioning diagrams, clarify the coordinates and elevations of toilet locations, and compile component processing lists and material lists. Hold three-level technical disclosure meetings covering construction process standards, quality acceptance requirements, safety operation procedures, coordination processes for professional trades, and key points for construction of special parts.
2. Site Survey and Leveling: Conduct on-site surveys of the terrain, underground pipelines, and surrounding environment, and remove obstacles such as weeds and gravel. Use machinery to level the site, with a slope controlled within 2%, and compact the base with a road roller to a compaction degree of ≥93%. Divide functional areas (material storage area, processing area, installation area), set up temporary fences (height ≥1.8m), build material warehouses and tool rooms (approximately 30 square meters in area), arrange temporary power lines and install distribution boxes and leakage protectors, and configure 2 4kg dry powder fire extinguishers for every 50 square meters.
3. Material Preparation: The main materials include structural steel materials (galvanized steel pipes, angle steels, colored steel plates), foundation materials (C30 concrete, graded sand and gravel, steel bars), decorative materials (non-slip tiles, ceramic tiles, aluminum-plastic panels, ceiling扣板 (Note: '扣板' is translated as 'ceiling panels' here as a general term, but a more specific translation may be needed based on the actual material), sanitary ware (water-saving squatting toilets, hand-washing tables, induction faucets), and equipment systems.