Performance of Circular Model Footing Resting on Sand Bed Reinforced with Vertical Reinforcement in Dry Condition

Authors

  • Manoj Krishna KV Department of Civil Engineering, Govt. SKSJTI, Bengaluru
  • Shivendra BT Department of Civil Engineering, DSCE, Bengaluru, India 560078
  • Kiran DA Siddaganga Institute of Technology

DOI:

https://doi.org/10.37591/joge.v8i3.5729

Keywords:

stabilization, surface footing, Bearing Capacity Ratio, Spacing, vertical reinforcement.

Abstract

Soil stabilization is the process of improving the engineering properties of the soil. The good old method of stabilization is by using the chemicals stabilization, whereas the recent method of improving the strength of the soil is by using the vertical reinforced earth. In the present work sand is filled in the 250x250x375 mm MS tank by using sand raining technique at a relative density of 67%. MS circular plate of 40 mm diameter with 25mm thickness materiel is considered as surface footing. That surface footing is resting on sand bed with and without vertical reinforcement. Over the prepared sand bed surface footing is subjected to static increasing load as per plate load testing procedure. Bearing Capacity Ratio (BCR) is dependent upon spacing, length and extent of reinforcing material and based upon experimental results following combination of reinforcement is suggested for deriving substantial improvement in bearing capacity. Spacing of vertical reinforcement used should be about 1.250 times the width of footing(U/B=1.250). Improvement of BCR at 25 mm settlement on compared to unreinforced condition at optimal spacing of U/B=1.250 is 140%.

References

Al-Aghbari MY. Settlement of shallow circular foundation with structural skirts resting on sand. The Journal of Engineering Research. 2007, 4(1): 11-16p.

Bassett RH, Last NC. Reinforcing Earth below Footing and Embankments. Proc. of the Symposium on Earth Reinforcement, ASCE, 1978, 202-231p.

Huang CC, Hong LL. Ultimate bearing capacity and settlement of footings on reinforced sandy ground. Soils and Foundations, 2000, 40(5): 65-73p.

Jha JN. Effect of vertical reinforcement on bearing capacity of footing on sand. Indian Geotechnical Journal. 2007, 37(1): 64-78p.

Jha JN, Choudhary AK, Gill KS. Bearing capacity improvement of soil using bamboo micropiles. International Journal of Plasma Science and Engineering. 2010, 3(1): 167-176p.

Jha JN, Shukla SK. Bearing capacity and settlement characteristics of sand subgrades with vertical reinforcement supporting a square footing. International Journal of Geosynthetics and Ground Engineering. 2015, 1(2): 1-13p.

Lizzi F. Reticulated Root Pile Structures for In-situ Soil Strengthening, Theoretical Aspects and Model Tests. Proc. Int. Conf. Soil Reinforcement, Paris. 1979, 2:317-324p.

Oda M, Koishikawa I, Higuehi T. Experimental study of anisotropic shear strength of sand by plane strain test. Soils and Foundations, JSSMFE. 1978, 18(1): 25-38p. DOI: 10.3208/ sandf1972.18.25.

Tatsuoka F, Mikki G. Fundamental Experiments on Earth Reinforcement and Practical Uses of Root Pile Method in Japan. Proc. Symposium on Rock and Soil Improvement including Geotextile Reinforced Earth and Modern Piling Method, Bangkok, 1982, D-2-1-D2-28p.

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Published

2021-12-31

Issue

Vol. 8 No. 3 (2021)

Section

Research Article

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