1. Basic expansion law: through the installation of concrete Wai Sets or reinforced concrete wai sets, increase outdoor led billboard bottom base of the area, change due to the Billboard base area of small, inadequate bearing capacity of the foundation caused by uneven settlement.
2. Pit-type Underpinning method: The concrete is poured directly into the pit after being replaced by the underpinning.
3. Pile-Type Underpinning method: the use of the lower part of the billboard base or both sides of the set of static pressure column, penetration pile, cast-in-place pile and other types of piles to carry out the basic reinforcement method.
4. Grouting Underpinning method: The chemical slurry is injected evenly into the foundation, through these slurry to the original loose soil or crack cementation solidification, in order to improve the foundation bearing capacity, waterproof impermeability effect.
Rectification is the use of artificial means to make the tilted ground reverse tilt the operation to achieve the correction of outdoor led billboard tilt. Commonly used outdoor billboards to rectify the foundation of the following two kinds of methods:
1. Landing correction method: In the outdoor led Billboard Foundation settlement of more than one side to prevent the sinking measures, while on the other side to take the landing measures. The method of forced landing includes: loading ingot or stone, constructing cantilever beam, digging land and rectifying water, etc.
2. Jacking Rectification method: In the Inclined Billboard Foundation settlement big Place, by adjusts the billboard each part the top rise quantity, causes it along a point or a certain line to make the whole plane rotation, in order to achieve restores the original position the goal.