Experimental Study on the Shear Properties of Soil around Piles with Permeation Grouting

While post-grouting is frequently reported to improve the engineering performance of piles, shear strength soil around piles not well understood. To investigate strengthening mechanism with permeation grouting, laboratory tests were carried out on homemade cement from aspects and microstructure characteristics. The evolution rule stress–shear displacement curve grouting different contents was analyzed, influence parameters explained. A composite exponential model describing stress silty clay established. Furthermore, content changes in microstructural characteristic studied. results show that penetration has a positive effect improving failure mode changed elastic–plastic brittle after grouting. Permeation makes particle structure denser, which limits pore arrangement distribution. under obeys Mohr–Coulomb criterion failure. It recommended increase grout diffusion radius during construction, considering reinforcement piles.