Vol. 11 No. 02 (2021): Journal of Materials & Construction
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Analyzing the effect of shaft-grouting technique to increase bearing capacity of bored pile

Tung Nguyen Van , Thien Huynh Quoc , Thoi Tra Huu , Long Phan Thien , Qui Lai Van

Keywords:

shaft-grouting
limited load capacity
unit friction
allowable settlement

Abstract

The paper focuses on analyzing and evaluating the effectiveness of Shaft-grouting technique to increase the shaft resistance of bored piles through the pile load test results of non-grouted bored piles and grouted bored piles at Friendship Tower project in District 1, Ho Chi Minh City. The efficiency of shaft-grouting is assessed by comparing the ratio of the unit friction fs (kN/m2) with NSPT index from the test results of non-grouted bored piles and grouted ones. The results showed that the shaft-grouting increased unit friction by 1.9-2.7 times. The efficiency of shaft-grouting for bored piles in sandy soils is higher than in clayey soils. The numerical simulation by Plaxis 3D was used to analyze the limited load capacity of the non-grouted bored piles and grouted bored piles in the same length. The limited load capacity of grouted pile increases by 25-30% compared to the non-grouted pile.

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How to Cite

Nguyen Van, N. V., Huynh Quoc, H. Q. ., Tra Huu, T. H., Phan Thien, P. T., & Lai Van, L. V. (2021). Analyzing the effect of shaft-grouting technique to increase bearing capacity of bored pile. Tạp Chí Vật liệu & Xây dựng - Bộ Xây dựng, 11(02), Trang 57 – Trang 64. https://doi.org/10.54772/jomc.2.2021.95

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