Effect of Soil Improvement Techniques on Increasing the Lateral Resistance of Single Piles in Soft Clay (Numerical Inves
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ORIGINAL PAPER
Effect of Soil Improvement Techniques on Increasing the Lateral Resistance of Single Piles in Soft Clay (Numerical Investigation) Saeid Eltaweila . Marawan M. Shahien . Ahmed M. Nasr . Ahmed Farouk . Mohamed Harfoush
Received: 11 July 2019 / Accepted: 26 August 2020 Springer Nature Switzerland AG 2020
Abstract Soft clay soil extends in many areas all over the world. The construction on soft clay is one of the most important problems in engineering practice. When the design engineers face this problem, they always use deep foundations. In many cases, the vertical loads are satisfied but the lateral capacity of the piles is not satisfied. In this paper, a series of 3D finite element analysis was performed to investigate the effect of soil improvement techniques on increasing the lateral pile capacity. The 3D finite element
S. Eltaweila (&) Civil Engineering Department, Tanta University, Wild Asfir, Sedi Salem 33633, Egypt e-mail: [email protected] M. M. Shahien Civil Engineering Department, Tanta University, Bajour, Menofia 32821, Egypt e-mail: [email protected] A. M. Nasr Civil Engineering Department, Tanta University, Sedi Gaber, Alexandria 21519, Egypt e-mail: [email protected] A. Farouk Civil Engineering Department, Tanta University, Tanta 31526, Egypt e-mail: [email protected] M. Harfoush Civil Engineering Department, Tanta University, Mansoura 35511, Egypt e-mail: [email protected]
results indicate that the improvement in the lateral pile capacity is strongly dependent on the combined effect of the lateral extent and the thickness of the improved zone around the pile head. The analysis indicates that the lateral pile capacity increased to about 240% greater than the capacity in native soft clay when a portion of soft clay is excavated and replaced with dense sand. In addition, the lateral pile capacity increased to a value greater than 600% when the soft clay is mixed with cement. Keywords Finite element analysis Pile lateral load tests Soft clay Soil improvement
1 Introduction The lateral capacity of the piles is often a critical component in engineering practice. Hence, the design engineers should take it into their account. The piles are frequently subjected to a high amount of lateral loads in addition to the applied vertical loads when used under tall chimneys, high-rise buildings, highway bridges, and coastal and offshore structures. The lateral loads can be produced by earthquakes, wind, ship impact, wave action, landslide forces and traffic. The foundation designers should pay attention when they design such structures on soft clay. A lot of theoretical and experimental work has been performed to predict and interpret the behaviour of piles under
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lateral loads. Matlock and Reese (1960) is regarded as one of the first attempts to interpret the lateral behaviour of piles. They developed a solution for calculating the soil reaction, the pile defle
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