Mobile Toilet Ground Construction

The method for fixing the ground for mobile toilet construction should be selected based on the ground type, usage scenario, and toilet specifications. Common methods and operational standards are as follows:

1. Expansion Bolt Fixing Method
Suitable for cement and hardened ground, the operation must strictly follow the positioning-drilling-installation process. First, use a level to position the four corners at the bottom of the toilet and mark the drilling positions, ensuring an error of no more than 3mm. After drilling with an impact drill, insert and tighten the expansion bolts. When connecting the bolts to the chassis, reserve 2-3mm of expansion space to prevent structural deformation due to thermal expansion and contraction. It is recommended to use 2-4 bolts on each side, and the load-bearing capacity of each bolt should be verified through calculation to enhance stability. This method is suitable for small to medium-sized toilets with a short construction period, but it is necessary to ensure that the ground hardness meets the standard (load-bearing capacity ≥ 5kN/㎡).

2. Concrete Pouring Fixing Method
For long-term fixed or heavy-duty toilets (such as those in scenic spots or construction sites), professional construction cooperation is required. The steps include excavating a foundation pit according to the toilet size, laying a 10-15cm gravel cushion at the bottom of the pit and compacting it; supporting the formwork and pouring concrete above C25, inserting a steel reinforcement framework (diameter ≥ 12mm) to enhance strength; after the concrete solidifies (usually taking 7-14 days), connecting the toilet chassis to the foundation through pre-embedded bolts or welding. This method offers the highest stability but requires prior application for a construction permit to avoid damaging underground pipelines or public facilities, and the cost is relatively high.

3. Counterweight Block Fixing Method
Suitable for temporary scenarios (such as exhibitions, emergency rescue) or non-hardened ground (such as grasslands, sandy ground). During operation, place prefabricated concrete blocks or sandbags around the bottom of the toilet. It is recommended that each block weighs ≥ 50kg, and the total counterweight should be ≥ 1.5 times the self-weight of the toilet (for example, a 2-ton toilet requires a 3-ton counterweight). The counterweight blocks should be wrapped with waterproof tarpaulin to prevent weight loss due to rain erosion; when moving, they should be disassembled by professionals to avoid tipping and causing injury. This method offers high flexibility but has weak wind resistance and requires regular inspection of the displacement of the counterweight blocks.

General Specification Requirements

• Ground Inspection: Before fixing, check the ground flatness with an error of ≤ 3mm; otherwise, level it.
• Load-Bearing Verification: The lessor should provide a ground load-bearing inspection report to ensure a load-bearing capacity of ≥ 5kN/㎡ and avoid settlement risks.
• Maintenance Inspection: Regularly inspect the fixing devices (such as bolt rusting, concrete cracking), and reinforce and apply anti-rust treatment (such as painting with anti-rust paint) before the rainy season.

Precautions: If the ground is soft soil or backfill, it should be compacted or replaced with gravel first; in coastal or high-humidity areas, stainless steel bolts or hot-dip galvanized fittings should be preferred to extend the service life.