Browsing by Author "Bariker, P."

Now showing 1 - 9 of 9

A Study on Trenching Techniques for Vibration Isolation: An Overview
(Springer Science and Business Media Deutschland GmbH, 2021) Bariker, P.; Kolathayar, S.
This paper presents a detailed review of past research studies on trenching techniques for vibration isolation. With rapid urbanization and fast-growing infrastructures in developing countries like India, it is very likely for many structures subject to vibrations from earthquakes, traffic movements, or machine vibrations. Though the trench technique for vibration screening is an established technique, there has been a lot of advancements in vibration screening in recent years. This paper presents an overview of the developments in trenching techniques for vibration screening from its inception to the latest advancements. The studies have been categorized into laboratory element/model tests, field tests, and numerical analyses. The review of studies highlights that the open trenches perform better isolation for shallow depths whereas the infilled trenches perform better than open trenches when the normalized depth of trench is deeper. Â© 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Analysis of Strength Properties of Cement-Stabilized Soil at Different Moulding Water Contents
(Springer Science and Business Media Deutschland GmbH, 2021) Bariker, P.; Kori, A.; Hulagabali, A.M.
In the present study, an attempt is made to evaluate the strength properties of red soil mixed with ordinary Portland cement. A series of standard proctor Tests, unconfined compression strength tests, direct shear tests and split tensile strength tests were performed on samples of red soil with a mixture of 6, 9 and 12% at an increment of 3% of ordinary Portland cement. The tests were conducted on red soils with specific gravity of 2.59 subjecting those to above-specified tests as per Indian Standards IS: 2720. At each mixture of each percentage of ordinary Portland cement sand, peak frictional angle and soil cohesion were found out by conducting direct shear tests. Most of the direct shear tests were conducted to shear strain in excess of 30%, and the stressâ€“strain response was observed and recorded. Also in the present work, the comparison in strength properties was done between the soils at wet of optimum and dry of optimum for all above-mentioned tests. The present trend of results was also matched with those of previous works. Â© 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Appraisal of Innovative Finned-Pile Foundations to Resist Lateral Loads
(Springer Science and Business Media Deutschland GmbH, 2022) Bariker, P.; Kolathayar, S.
Multistoried buildings are subjected to a significant amount of lateral forces due to winds and earthquakes in onshore structures and forces due to water currents and heavy winds in offshore structures. Foundations supporting such structures as offshore wind turbines should resist extensive lateral forces and pullout forces. To sustain these loads, innovative types of pile foundations need to have experimented with in place of regular pile foundations for more economic and efficient performance. In this paper, an attempt is made to demonstrate the efficiency of adopting finned-piles concerning previous literature studies. This work highlights some of the experimental investigations, model studies, and numerical studies (FEM, FDM) adopted to find the usefulness of finned-piles in resisting the lateral loads. Some of the key-points of adopting such foundations are discussed. Finally, future untapped avenues explored on finned piles are also brought out in the paper. Â© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Assessment of Effect of Deep Excavation on Adjacent Structures Using Finite Element Analysis
(Springer Science and Business Media Deutschland GmbH, 2022) Hulagabali, A.M.; Bariker, P.; Solanki, C.H.; Dodagoudar, G.R.
Deep excavations and its impact on neighboring buildings is one of the most important issues when planning to construct new facility. In metropolitan city, itâ€™s a challenging task for the execution of underground construction due to limited space and high cost of land. Hence, this implies that deep excavation has become necessary for the proper utilization of available space. Therefore, itâ€™s important to make sure that adjacent structures are safe against deep excavation-induced deformation. In this study, a two-dimensional Finite Element Method in PLAXIS 2D has been chosen for the soilâ€“structure analysis of deep excavation supported by contiguous pile wall located in Addis Ababa. For the numerical analysis two constitutive models Mohrâ€“Coulomb and Hardening Soil have been applied in drained effective stress condition. The objective of this study is to investigate the effect of deep excavation on adjacent structures by considering support stiffness, ground water condition, neighboring building distance from face of excavation, and building load. The analysis of this study monitors parameters like maximum lateral wall deflection (Î´hm), maximum settlement (Î´vm), angular distortion of the neighboring structures, horizontal strain, and maximum bending moment of contiguous pile wall. Moreover, normalization of lateral wall deflection (Î´hm/He) and settlement (Î´vm/He) to the excavation depth (He) and neighboring building distance-excavation (D/He) has been presented. Parametric studies have been carried out by varying parameters of diameter of contiguous pile wall, horizontal anchor spacing, and pre-stress force of anchor. The analysis result has been recorded in terms of lateral wall deflection, ground settlement, and bending moment. Â© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Dynamic Soil Structure Interaction of a High-Rise Building Resting over a Finned Pile Mat
(MDPI, 2022) Bariker, P.; Kolathayar, S.
High-rise building safety is generally supported by pile-mat systems. They must be sturdy enough to withstand potential lateral loads brought on by earthquakes, wind, dredging, and machine vibrations, in addition to increased axial loads. An innovative piled-mat foundation system is required to deal with these impacts because standard pile foundation systems only have lateral capacities that are 10% of their axial capacities. This study aims to reduce the damage caused by seismic impacts on high-rise buildings using shear walls supported by piled mats, thereby minimizing vibrations within the structure. Compared with conventional pile systems, the finned-pile foundation is a proven method that can withstand a 65% to 80% higher lateral load; hence, a series of SSI analyses were performed on a 25-story high-rise building, with the shear wall resting on a finned-pile mat (FP-Mat), under a far-field earthquake excitation, using ABAQUS software. The seismic responses were studied by performing a time–history analysis on the FP-Mat, with varying fin-lengths (Lf) of 0.2Lp, 0.4Lp, 0.6Lp, and 0.8Lp, which was compared with an analysis of a conventional piled-mat (RP-Mat). The seismic responses for RP-Mat and FP-Mats were studied with peak-acceleration, maximum horizontal displacement, and inter-story drifts acting as the damage parameters. The provision of FP-Mats significantly reduced the vibrations and seismic effects on the building, and as the fin-length increased, the vibrations and seismic effects reduced further. The drifting bound was also reduced as the fin-length increased. The optimum fin-length for FP-Mats is suggested to be 0.6Lp in terms of seismic performance and construction efficiency. This study helps one understand the seismic behaviors of high-rise buildings resting on finned pile mats. © 2022 by the authors.
Effect of Load Inclination on the Lateral Resistance of Belled Piles: A Numerical Approach
(Springer Science and Business Media Deutschland GmbH, 2025) Bariker, P.; Kolathayar, S.
Belled piles are commonly used in geotechnical engineering to provide foundation support in unstable soils. These piles are characterized by an enlarged base, increasing the pileâ€™s load-bearing capacity. Inclined loads are experienced in various engineering applications, such as retaining walls, bridge abutments, and slope stabilization. This study conducts a numerical analysis of belled piles subjected to inclined loads using a finite element approach. The present study investigates the behaviour of belled piles under inclined loads and evaluates their performance in terms of deformation, stress distribution, and load-carrying capacity. The model considers the interaction between the pile and the surrounding soil. The inclined load is applied at various angles to investigate its effect on the pile response. The numerical analysis reveals that several factors, including the angle and magnitude of the applied load, the L/D ratio and the geometry of the belled pile, influence the behaviour of the belled pile under an inclined load. The results show that the deformation and stress distribution in a pile is influenced by the inclination angle of the applied load, with higher inclination angles resulting in larger pile deformations and stress concentrations at the base of the pile. The lateral resistance of the belled pile with a bell angle of 3Â° significantly carries 21% more load than that of 7Â°. The findings of this study provide insights into the behaviour of belled piles subjected to inclined loads. They can be used to guide the design and analysis of belled pile foundations in geotechnical engineering projects. Â© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
Lateral Resistance of Finned-Piles in c– ϕ Soils: Experimental Investigations and Numerical Studies
(Springer, 2023) Bariker, P.; Kolathayar, S.; Chandrasekaran, S.S.
Finned pile foundation systems are advantageous at resisting lateral loads, particularly for offshore foundations. They can replace large-dimension monopiles. This paper evaluates the lateral load resistance of finned piles for onshore foundation applications. The dimensionless factor fin-efficiency is used to quantify the improvements in the resistance caused by the fins. This study performed a series of small-scale model experiments for long piles embedded in c– ϕ soil. The numerical studies were performed with finite element approach. The paper presents the influence of fin-factors such as fin-position, width, length, orientation, embedment in pile cap, and eccentric loading on lateral resistance of finned pile. This study also suggests the optimum fin parameters that help increase the lateral resistance to the maximum possible. The study on effect of fin-embedment in pile cap shows that finned piles with fin embedded in pile cap (FP-FEPC) perform better than those without fin embedment (FP-WFE). The material cost-benefit study supported the economy of the construction with the finned pile, utilizing only 55% of the material used by the regular pile. © 2023, The Author(s), under exclusive licence to Indian Geotechnical Society.
Model tests and numerical modelling on lateral resistance of novel finned-pile groups
(Springer Science and Business Media Deutschland GmbH, 2023) Bariker, P.; Kolathayar, S.
Piles are generally adopted as the foundation in groups; pile group efficiency reduces with an increase in the number of piles in a pile group. For regular pile groups, pile group efficiency will be lesser than 90%. This paper attempts to increase the lateral resistance of the pile group by adopting innovative finned piles. Small-scale model experiments were performed on regular and finned pile groups embedded in c– ϕ soil. The numerical studies were performed with the Finite Element Approach. The paper investigates and presents the effects of various factors, such as the effect of fins for the pile group, the number of piles (n), pile spacings (S) in the pile group, and behavior under eccentric loading. Studies were performed over pile groups with 4 and 5 piles spaced at 4 Dp and 6 Dp , forming P 4 S 4 , P 5 S 4 , P 4 S 6 , and P 5 S 6 . The finned pile groups were observed to resist greater lateral loads than regular pile groups, increasing the pile group efficiency, ranging up to 185%. For finned pile groups, the effect of pile-spacing (S) dominates over the number of piles (n). The cost-benefit analysis of finned pile groups was performed compared to regular pile groups. In addition, regression analyses were performed to develop a correlation to calculate the lateral resistance of the finned pile groups from various fin parameters. © 2023, Springer Nature Switzerland AG.
Numerical Simulation of Field Vane Shear Test Using Finite Element Method
(Springer Science and Business Media Deutschland GmbH, 2022) Hulagabali, A.M.; Bariker, P.; Solanki, C.H.; Dodagoudar, G.R.
One of the most versatile and widely used devices for investigating the undrained shearing strength and sensitivity of soft deposits of clay is the field vane shear test. However, despite its common usage, the interpretation of the vane test has been quite often a controversial issue. Thus, this paper aims to analyze the effects of vane blade thickness and the conventional interpretation of determining shear strength from the vane shear test using the finite element method. The soil stressâ€“strain response has been simulated using the Mohrâ€“Coulomb constitutive model and the Hardening soil model. The sensitivity analysis of boundary conditions has been performed to select the best boundary condition among the different alternatives and to use it properly to get better output for further analysis. The results of numerical simulations have been compared with the conventional interpretation results in verifying and analyzing the performance of the numerical model. It is observed that the measured torque at failure obtained from PLAXIS 3D using the Hardening soil model fits well with the result from the theoretical calculation. However, the Mohrâ€“Coulomb gave too large the torque at failure and the big difference between simulated and hand calculation. The measured undrained shear strengths are inversely proportional to the perimeter ratio of the vane and the same type of soil but different blade thickness, the undrained shear strength can vary significantly. The failure geometry around the blade is recognized in the plastic points, more emphasized at the top than in the middle of the device. Â© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.