First of all, the rainwater infiltrates the ground, which will make the surface structure become loose. When using the jack for operation, it is easy to damage the surface under the action of pressure. In addition, the jack will also affect the lifting work due to the instability of the force point.

The best solution is to pad sleepers or steel plates under the jack. The purpose is to increase the contact area between the jack and the ground, so as to reduce the pressure. This can effectively protect the ground, reduce the local pressure on the ground, and effectively stabilize the focus.

The second is the corrosion damage to the jack in rainy days. The jack is made of metal, which is easy to be oxidized under the scouring of rain. The rusted Jack will greatly reduce its operation smoothness and lifting capacity. This has seriously affected the progress of the work.

The best solution is to pay attention to the maintenance of the jack. After use, the water stains on the jack must be wiped clean and coated with lubricating oil or antirust grease, in order to better use next time and ensure the service life of the jack.