Increasing Piledraft Bearing Capacity Using Grout injection

Subject Areas : Structural Engineering

Arif Khan ¹ , Ghazal Heidari ² , Behzad Shokati Beyrag ³ , Sahand Shokri ⁴ , Rashid Hajivand Dastgerdi ^{5 *}

1 - State Key Laboratory of intelligent Geotechnics and Tunnelling, southwest jiaotong university, China
2 - Faculty of Civil Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
3 - Faculty of Civil Engineering, Yildiz Technical University, Istanbul, Turkey
4 - Pars Olang Consulting Engineers Company, Tehran, Iran.
5 - Faculty of Geo-Data Science, Geodesy, and Environmental Engineering, AGH University of Science and Technology, Krakow, Poland

Received: 2024-04-15 Accepted : 2024-10-02

Keywords: Piledraft, Deep Foundation, FEM, Ground Improvement.,

Abstract :

Deep foundations, such as piledraft systems, are commonly used to transfer heavy loads from the structure to the underlying layers. In this study, we numerically investigated a piledraft system and an injection zone under, to capture the effects of different parameters on the system bearing capacity. For this purpose, we made 36 finite element models with different injected zone area size, thickness and material strength. As a result, for designing piledraft with injection under piles it is important to design the injection zone with enough thickness and stiff materials in which shear punching failure won’t happen before soil reaches its maximum capacity. Also, by increasing the strength of the injection material, as well as the thickness and area of the injection, the bearing capacity of the whole system will increase. Deep foundations, such as piledraft systems, are commonly used to transfer heavy loads from the structure to the underlying layers. In this study, we numerically investigated a piledraft system and an injection zone under, to capture the effects of different parameters on the system bearing capacity. For this purpose, we made 36 finite element models with different injected zone area size, thickness and material strength. As a result, for designing piledraft with injection under piles it is important to design the injection zone with enough thickness and stiff materials in which shear punching failure won’t happen before soil reaches its maximum capacity. Also, by increasing the strength of the injection material, as well as the thickness and area of the injection

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