apoorva agarwal - Academia.edu (original) (raw)

Papers by apoorva agarwal

Journal of Cleaner Production

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, 2018

The slope stability of an existing dump at Delhi has been analyzed for (a) dry waste, (b) with po... more The slope stability of an existing dump at Delhi has been analyzed for (a) dry waste, (b) with pore water pressure, and (c) with earthquake. The results show that existing slopes are just stable in the dry case and instability is triggered by development of pore water pressures due to infiltration in rainy season as well as by seismic forces. In order to stabilize the slope of the dumps, the traditional way is to flatten the slope by extending the toe of the slope outward in horizontal direction or by moving the crest inwards. This is not a feasible solution in Delhi where there is a scarcity of land and waste heights and volume are very large. The alternative considered in the paper is the construction of reinforced soil (RS) berm at the base of Municipal Solid Waste (MSW) dumps. A parametric study has been carried out considering the influence of the following factors (a) height of waste and (b) slope angle of waste for three cases viz., original slope, slope with 10 m high RS berm and slope with 20 m high RS berm. Apart from internal stability, the external stability of the complete system is analyzed using the limit equilibrium method of analysis. An optimum solution is suggested based on the results of the study. The study shows that RS berm offers a more acceptable solution for stabilizing the slopes of waste dumps where limited space is available beyond the toe of the existing dump.

Lecture Notes in Civil Engineering, 2021

Binquet and Lee (1975b) gave a theoretical analysis to find out the pressure intensity of isolate... more Binquet and Lee (1975b) gave a theoretical analysis to find out the pressure intensity of isolated strip footing footings resting on reinforced earth slab for a given settlement. To calculate these forces two dimensionless parameters are defined. These parameters are Jz and Iz and they depend on Z / B ratio. To calculate these parameters equations are being formulated. As these equations are complicated to be used in practise by designers, the design charts are being prepared to give these values readily to the designers without many efforts. These charts are being produced considering the static case i.e. for αh = 0. No seismic effect was taken in consideration while developing these charts. Through this paper, it will be an attempt to consider the seismic effect on the strip footing resting on reinforced earth bed by producing similar type of charts for different values of αh ranging upto 0.2. With the availability of such charts, designers can not only be able to find the bearing...

With an increase in demand for construction the use of poor soils becomes imperative. Soil bearin... more With an increase in demand for construction the use of poor soils becomes imperative. Soil bearing capacity and settlement play an important role in the design of foundations. Seismicity of the site is another important parameter in the design of the foundation for a structure. Hence seismic bearing capacity of soil becomes an important component in the design. In weak soils often deep foundations are recommended on account of the low soil bearing capacity available. In poor soils, ground improvement techniques are commonly used to improve the soil bearing capacity. Reinforcing earth with geo synthetic is one such technique adopted in practice. This is preferred due to its cost effectiveness as in most of the engineering projects economy plays an important role. If the weak soil is improved by using geo synthetic, then it becomes feasible to use shallow foundations instead of deep foundations for the same structure, thus effecting economy. Shallow foundations still remain the most used foundation type in construction due to its economy and ease in construction. In this paper an attempt has been made to develop an analytical approach to obtain the seismic bearing capacity of a strip footing resting on reinforced earth. The approach is based on the analysis proposed by Binquet and Lee (1975b) for a strip footing subjected to static load. Both vertical and horizontal accelerations have been considered in terms of seismic coefficients, αh and αv. Results have been presented in the form of non-dimensional charts from which seismic bearing capacity can be obtained, conveniently. Both rupture strength and frictional resistance criteria, have been taken into account in preparing these charts. Charts incorporate horizontal seismic acceleration coefficient, αh = 0.0 and 0.10. The value of vertical seismic acceleration coefficient, αv, is taken as 2/3αh. An illustrative example has been included for a lucid understanding.

Journal of Cleaner Production

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, 2018

The slope stability of an existing dump at Delhi has been analyzed for (a) dry waste, (b) with po... more The slope stability of an existing dump at Delhi has been analyzed for (a) dry waste, (b) with pore water pressure, and (c) with earthquake. The results show that existing slopes are just stable in the dry case and instability is triggered by development of pore water pressures due to infiltration in rainy season as well as by seismic forces. In order to stabilize the slope of the dumps, the traditional way is to flatten the slope by extending the toe of the slope outward in horizontal direction or by moving the crest inwards. This is not a feasible solution in Delhi where there is a scarcity of land and waste heights and volume are very large. The alternative considered in the paper is the construction of reinforced soil (RS) berm at the base of Municipal Solid Waste (MSW) dumps. A parametric study has been carried out considering the influence of the following factors (a) height of waste and (b) slope angle of waste for three cases viz., original slope, slope with 10 m high RS berm and slope with 20 m high RS berm. Apart from internal stability, the external stability of the complete system is analyzed using the limit equilibrium method of analysis. An optimum solution is suggested based on the results of the study. The study shows that RS berm offers a more acceptable solution for stabilizing the slopes of waste dumps where limited space is available beyond the toe of the existing dump.

Lecture Notes in Civil Engineering, 2021

Binquet and Lee (1975b) gave a theoretical analysis to find out the pressure intensity of isolate... more Binquet and Lee (1975b) gave a theoretical analysis to find out the pressure intensity of isolated strip footing footings resting on reinforced earth slab for a given settlement. To calculate these forces two dimensionless parameters are defined. These parameters are Jz and Iz and they depend on Z / B ratio. To calculate these parameters equations are being formulated. As these equations are complicated to be used in practise by designers, the design charts are being prepared to give these values readily to the designers without many efforts. These charts are being produced considering the static case i.e. for αh = 0. No seismic effect was taken in consideration while developing these charts. Through this paper, it will be an attempt to consider the seismic effect on the strip footing resting on reinforced earth bed by producing similar type of charts for different values of αh ranging upto 0.2. With the availability of such charts, designers can not only be able to find the bearing...

With an increase in demand for construction the use of poor soils becomes imperative. Soil bearin... more With an increase in demand for construction the use of poor soils becomes imperative. Soil bearing capacity and settlement play an important role in the design of foundations. Seismicity of the site is another important parameter in the design of the foundation for a structure. Hence seismic bearing capacity of soil becomes an important component in the design. In weak soils often deep foundations are recommended on account of the low soil bearing capacity available. In poor soils, ground improvement techniques are commonly used to improve the soil bearing capacity. Reinforcing earth with geo synthetic is one such technique adopted in practice. This is preferred due to its cost effectiveness as in most of the engineering projects economy plays an important role. If the weak soil is improved by using geo synthetic, then it becomes feasible to use shallow foundations instead of deep foundations for the same structure, thus effecting economy. Shallow foundations still remain the most used foundation type in construction due to its economy and ease in construction. In this paper an attempt has been made to develop an analytical approach to obtain the seismic bearing capacity of a strip footing resting on reinforced earth. The approach is based on the analysis proposed by Binquet and Lee (1975b) for a strip footing subjected to static load. Both vertical and horizontal accelerations have been considered in terms of seismic coefficients, αh and αv. Results have been presented in the form of non-dimensional charts from which seismic bearing capacity can be obtained, conveniently. Both rupture strength and frictional resistance criteria, have been taken into account in preparing these charts. Charts incorporate horizontal seismic acceleration coefficient, αh = 0.0 and 0.10. The value of vertical seismic acceleration coefficient, αv, is taken as 2/3αh. An illustrative example has been included for a lucid understanding.