A 1.2 m. wide wall footing was constructed on the surface of a silty sand soil. If the bottom of the footing is embedded to a depth of 0.75 m. from the ground surface, determine the percent increse of the bearing capacity. Unit weight of silty sand soil = 18.88 kN/m³ angle of friction 0 = 30° and is cohesionless. Bearing capacity factors: Nc = 37.16 Ng = 22.46 Ny = 19.13 wall footing or strip footing 1.2 m Ans. 146.76%

A 1.2 m. wide wall footing was constructed on the surface of a silty sand soil. If the bottom of the footing is embedded to a depth of 0.75 m. from the ground surface, determine the percent increse of the bearing capacity. Unit weight of silty sand soil = 18.88 kN/m³ angle of friction 0 = 30° and is cohesionless. Bearing capacity factors: Nc = 37.16 Ng = 22.46 Ny = 19.13 wall footing or strip footing 1.2 m Ans. 146.76%

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter16: Shallow Foundations-bearing Capacity

Section: Chapter Questions

Problem 16.19CTP: A 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a...

See similar textbooks

Similar questions

Refer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The distance between the two column loads L3 = 13.5 ft. The proximity of the property line at the left edge requires that L2 = 3.0 ft. The net allowable soil pressure is 2500 lb/ft2. Determine the breadth and length of a rectangular combined footing.
A flexible circular footing of radius R carries a uniform pressure q. Find the depth (in terms of R) at which the vertical stress below the center is 20% of q.
2 m 3m 75 EV 1 m A The footing plan is shown loaded uniformly in a rectangular area. What is the value of the increase of stress of the second or loaded area (Aσ₂) to be subtracted?
A rectangular footing 3m x 2m exerts a pressure of 100kN/m2on a cohesive soil Es= 5x104 kN/m2and µ = 0.5. Estimate the immediatesettlement at the centre, assuming(a) the footing is flexible (b) the footing is rigid (ii) Write about influence of water table in determination of bearing capacity.
2) A square footing carries an allowable load of 59130kg including its own weight. The bottom of footing is 1.0m below ground surface and water table coincide with bottom of footing. Assume General shear failure. Unit Weight = 1846kg/cu.m c= 1605kg/sqm Nc = 35 Nq=22 Ny=19 1.0m Sat unit wt = 1956kg/cu.m
A square footing is to be constructed on a sitly sand soil, as shown in the figure below. The groundwater table is at depth 15 m below the ground surface. Compute the ultimate bearing capacity and the column load required to produce a bearing capacity failure. ć= 8 kPa Solution: $ = 30 ý = 19 1 m. kN m³ 0.6 m-
A circular footing with a 1.5 m diameter is to be constructed 1.2 m below the ground surface. Thesubsoil consists of a uniform deposit of dense soil having the following strength parameters.Angle of internal friction = 25o, Nc = 24.1 ; Nq =13.1 ; N = 9.1Unconfined compressive strength = 96 kN/m2Unit weight of soil = 20.12 kN/m3The ground water table is at great depth and its effect can be ignored.a) Compute the Ultimate bearing capacity of the soil.b) Compute the gross allowable bearing capacity of the soil using a factor of safety of 3.c) Compute the allowable load the footing could carry
For the square footing shown below, use the general bearing capacity equation to determine the gross allowable load (kips) that the footing can carry. Assume a general shear failure. y = 98 pcf; Y sat = 120 pcf; c = 0; $ = 30°; Df = 4 ft; D = 1 ft; B = 3 ft; F.S. = %3D 3.0 Groundwater table Y sat В
A 5 * 7 ft footing is founded at a depth of 2 ft and supports a vertical load of 80 k and a moment load of 30 ft-k in the B direction and 50 ft-k in the L direction. Determine the dimen-sions of the equivalent uniformly loaded footing and compute the equivalent bearing pressure.
A strap footing consists of two footings connected by strap beam. Allowable soil pressure is 450 kPa. Footing thickness is 600mm and the bottom of the footing is 1.5m below the ground. Assume soil weight to be 19 Kn/m3 and concrete weight to be 24 Kn/m³. Use f'c = 20.7 Mpa and fy = 414 Mpa. Use 1.2DL + 1.6LL. gog = galow - footing weight – soil weight. DL = 275 kN LL = 400 kN DL = 600 kN LL = 500 kN 4.8 m 400 x 400 column 400 x 400 column 1.2 m 1.2 m a) Calculate the footing dimensions. (Size is in multiples of 100 mm) b) Draw the Shear and Moment Diagram on the Longitudinal Direction. Show the maximum shear and moment.
A circular footing is to carry the load given. The foundation shall be embedded at a depth of 2.2 m below ground level (GL). The groundwater table was observed 2 m below BOF. Using the following soil data (dense sand): γsoil = 18 kN/m3 γsub = 10 kN/m3 c = 12 kPa Nc = 17.69 Nq = 7.44 Nγ = 3.64 FS = 3.0 If the total service load to be carried concentrically is 520 kN, what should be the radius of the circular footing (m)? the final ans is 0.91
A rectangular footing has dimensions shown and is acted upon by a dead load of 668.00 kN and a live load of 551.00 kN. The column dimension is 282x572 mm where the shorter dimension is parallel to B. The thickness of the footing is 564mm. f'c=28 MPa and fy=420 MPa for diameter 20mm bars. A=3.3m and B=5.7m Calculate the ratio of the Ultimate Shear Force to Shear Capacity in one- way shear. Consider critical case only. Answer is 0.6175 (Complete Solution)A