A case study of the improvement of an old building’s shallow foundation resting on sandy clay soil using cement slurry grouting technique

¹ Faculty of Civil Engineering, Hanoi University of Mining and Geology, Hanoi, Vietnam ;
² Geotechnical Engineering, Construction Materials, and Sustainability Research Group, Hanoi University of Mining and Geology, Hanoi, Vietnam
³ Transport engineering consultant international joint stock company, Tu Liem South, Hanoi, Vietnam
⁴ School of Civil Engineering, Rajamangala University of Technology Isan 744 Sura Narai Road, Muang District, Nakhon Ratchasima 30000 Thailand

^* Corresponding author: buivanduc@humg.edu.vn

Abstract

The need to rebuild and upgrade old structures has grown in recent years, particularly in large urban areas. These renovation and upgrade activities frequently affect the structural load of the building, eventually increasing the loads acting on the foundation. This paper illustrates a case study in which the cement grouting method was used to improve the load-carrying capability of an old structure's foundation. The influence of various key variables of the cement grouting method, such as the diameter, length, and angle of inclination of the mortar pile, was also assessed using the finite element (FE) method, Plaxis 2D. Finally, the optimum parameters for the strengthening method used in the study building were chosen based on the FE analysis results of the improvement of the bearing capacity of the foundation using the cement slurry grouting method.