Bearing Capacity of Shallow Foundation on Collapsible Khonkaen Loess

Piyasawat, Kokkrit; Nuntasarn, Ratamanee; Hormdee, Dolrerdee; Punrattanasin, Pongsakorn

doi:10.21660/2021.80.j2067

Cited by 3 publications

(1 citation statement)

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“…The result showed conformity between the experimental test and Terzaghi's theory. This finding was also supported by previous research, including Piamat K., et al [25], as well as Isnaniati and Mochtar [26].…”

Section: Resultssupporting

confidence: 90%

Effectiveness of Micro-Pile Installation Configuration for Increasing the Ultimate Shallow Foundation Bearing Capacity on Soft Clay Soil

2024

GEOMATE

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Soft clay soil is known for low bearing capacity and is prone to soil collapse under shallow foundations through Local Shear Failure. An approach to enhance the load-bearing capacity of such soil is by adopting micro-piles as reinforcement. This study aims to determine the effectiveness of micro piles in strengthening shallow foundations on soft clay soil through laboratory-scale testing. The soft soil used comes from kaolin clay characterized by a cohesion (cu) of 20.692 kN/m 2 and water content (wc) of 58.631%. These properties guided the crafting of test specimens, formed with a diameter (ds) of 0.33m and a height (Hs) of 0.185m. Micropiles were constructed from bamboo with varying numbers (n = 4, 9, 16, 25), lengths (L1= 1.33B, L2= 1.73B, L3= 2.13B), and diameters (d1= 0.03B, d2 = 0.04B, d3= 0.07B). The shallow foundation model with a square shape of BxB (where B=0.075 m), incorporated diverse configurations for the installation of micro-piles (K1, K2, K3). The results showed that more micro-piles (n) led to a higher bearing capacity ratio at a 0.1B reduction (Rqult-mp). The most significant enhancements occurred with the longest micro-piles (L3 = 2.13B), the highest number (n4 = 25), and a diameter of 0.04 B. Additionally, configurations including micro-piles installed beneath and extending up to the foundation's edge (K1 and K2) exhibited significant enhancement in Rq0.1B for identical micro-piles numbers (n). The installation of micro-piles beyond the foundation perimeter did not yield substantial increases in Rq0.1B and, therefore, is not recommended.

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Section: Resultssupporting

confidence: 90%