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Subject: Civil Engineering × Author: Arya, Manish × End date: 2024 × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    Study on Load Carrying Capacity of Unreinforced Slopes with Varied Footing Shapes and Edge Distance using PLAXIS 3D
    (Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, 2023-02-01) Arya, Manish; Suman, Sanjeev
    In Uttarakhand's hilly regions, construction of shallow footings close to sloping ground is very common. Special care must be taken when estimating the load carrying capacity of such footings beacuase the slope geometry interferes with the footing's failure zone. The choice of footing on unsupported sloping grounds becomes important because different footing shapes have different load distribution patterns which gives different load carrying capacities. The improper formation of the passive resistance zone toward the face of the slope may significantly reduce the bearing capacity of the foundation for footing placed on the crest or on the face of a slope. For the presented research problem, the slopes were modeled in the PLAXIS 3D software with slope angles of 15°, 20°, 25°, 30° and 35°and with different shaped footings (square, rectangular, circular and trapezoidal), placed at different edge distances of 1m, 2m, 4m, 6m and 8m having same bearing area of 4m2 for each type of footing. A total of 100 models were prepared in the PLAXIS 3D for the analysis of load carrying capacity of footing resting near unreinforced slope for various cases. The soil is of loamy type and its properties are taken from a landslide prone area named Kakri Ghat in Nainital district of Uttarakhand. The effect of slope angle and distance of footing from the edge of the slope on the load carrying capacity of the footing have been researched and findings are discussed in detail. The results are later verified with the analytical methods and the edge distances after which the effect of slope angle gets nullified is verified with the charts given by Kusakabe (1981). It has been concluded that the load carrying capacity of the footings increases with the increase in the edge distance and decreases with the increase in slope angle. The effect of shape of the footing on LCC is complex phenomenon and the results are different for different case scenarios. The best footing shapes for various cases for maximum load carrying capacity are discussed in the chapter 4.