The construction, distribution and sales of pre pressure water bag and pressure test water bag of Suan bridge make the structure more reasonable through three-dimensional plastic design, eliminate concentrated stress, make the material selection more reasonable through numerical simulation and simulation calculation, and ensure the safety performance; The multi-layer composite structure makes the bag soft and well sealed. The bag is divided into three parts: the bag body, the transition section and the end. After setting out and cutting, it is spliced into a sealed bag. In order to increase the strength, the external composite reinforcement is added.

Advantages of the eighth generation preloaded water bag: 1. Easy to use; 2. Green environmental protection; 3. Safe and reliable; 4. Cost saving.

Instead of traditional sandbags and concrete block preloading, it is convenient to transport and is not limited by whether there is a tower crane on the site. As long as there is a crane, preloading can be realized. It is very convenient to use. The PVC water bag is free of any pollution, safety and risk, low cost, light weight, and extremely convenient to operate.