Mobile Toilet Base Too Soft

A soft mobile toilet base can be resolved by inspecting the shock absorption device, confirming the ground foundation, adjusting the installation method, and checking for material issues.

1. Inspect the shock absorption device installation
The shock absorption device is a key component affecting the stability of the base. Ensure that the shock-absorbing rubber pads or spring shock absorbers are fully in contact with the support frame and the ground, avoiding misalignment or suspension. If installed in the wrong direction (e.g., the rubber pad is placed backward) or if the rubber pad is worn due to long-term use, the shock absorption effect will be abnormal, resulting in excessive softness and wobbling of the base. In this case, readjust the direction of the shock absorption device or replace it with a new rubber pad that meets the specifications (e.g., a natural rubber pad with a thickness of ≥10mm and a Shore hardness of 60-70).

2. Confirm the ground foundation conditions
The flatness and load-bearing capacity of the ground directly affect the stability of the base. The ground must meet a flatness error of ≤2 millimeters. If there are uneven areas, it will cause uneven stress distribution on the base, exacerbating the softness. Additionally, the ground must have sufficient load-bearing capacity, such as a static load capacity of no less than 300 kilograms per square meter. Otherwise, long-term use may cause the base to sink due to ground compression. If the ground conditions are insufficient, reinforcement is required by laying steel plates or concrete leveling layers.

3. Adjust the installation method
In temporary use scenarios (e.g., municipal events), the height of the base support frame should be flexibly adjusted according to the ground conditions. When using expansion bolts for fixation, ensure that the bolt length matches the ground material: for concrete floors, it is recommended to use expansion bolts with a length of ≥80mm and tighten all bolts evenly to prevent uneven stress distribution due to local loosening. If the base support frame is adjustable, stability can be improved by increasing the contact area between the support frame and the ground (e.g., by adding a wide base plate).

4. Check for material issues
If the base uses a soft-pack structure (e.g., polyurethane foam cushioning layer), check whether the material's performance has degraded due to moisture absorption. Polyurethane foam loses elastic modulus after absorbing moisture, exacerbating the softness. In this case, a closed-cell foam moisture barrier pad (with a water absorption rate of ≤0.5%) can be installed between the base and the ground to block moisture penetration. Additionally, regularly check whether the soft-pack structure is aging or cracking, and replace it with a more weather-resistant material such as high-density polyethylene (HDPE) if necessary.