The uneven settlement of the road surface under the viaduct often occurs, which not only affects the appearance of the road, but also seriously threatens the driving safety. According to the relevant literature and engineering practice, there are two reasons for the uneven settlement of the pavement under the viaduct.
First, the foundation soil quality. These roads are soft soils with high natural water content, high compressibility and low permeability under the mixed fill and plain fill layers. After the soft soil is subjected to the load, the deformation amount is large, which is manifested as settlement in the pavement.
Second, there is a pile foundation under the column cap of the viaduct, and the compressive modulus of the foundation soil layer is relatively large, so that the settlement of the nearby pavement in the state of common stress is relatively small; on the roadbed pavement, the foundation is relatively loose, resulting in settlement. relatively large amount. Under the long-term load, the settlement difference between the two is increasingly significant.
After a deep understanding of the crux of the problem, the solution gradually surfaced. The damage caused by this uneven settlement can be alleviated by soft soil solidification on the road surface, especially the roadbed road far away from the elevated column, to reduce its absolute settlement. This is where the
soil stabilization system comes into play.
The
soil stabilization system is a kind of soil stabilization equipment. It uses the mixing head to directly act the soil solidification agent on the soft soil to solidify it in situ to form a composite stable base. The system is suitable for the solidification of shallow soft soil on the surface, with a maximum solidification depth of 10 meters. The solidified base has good bearing capacity and can be used for construction by heavy machinery without subsidence risk.