Numerical simulation study on grouting engineering in soft soil foundation of Lang-Cang Highway

The soft soil under the Lang-Cang Highway of Hebei province in china mainly consists of low liquid limit middle-high compressibility clay layer. In order to shorten construction period, reinforce the foundation directly and rapidly, increase mechancial strength and deformation modulus and decrease the total settlement ,the static grouting method is used to strengthen the soft soil foundation. In this paper, the law of settlement deformation of foundation with and without grouting-renforce is analyzed respectively by adopting FLAC^3D on the characteristics of soft soil foundation and the actual data of settlement deformation. According to the features of the highway after putting into operation, the creep characteristics of the embankment and the effect of grouting used in soft layer was researched,which provided construction and safty operation of Lang-Cang Highway with certain reference value.