Recent questions tagged geotechnical-engineering

A reinforced concrete circular pile of $12 \: m$ length and $0.6 \: m$ diameter is embedded in stiff clay which has an undrained unit cohesion of $110 \: kN/m^2$. The adh...

A granular soil has a saturated unit weight of $20 \:kN/m^3$ and an effective angle of shearing resistance of $30^{\circ}$. The unit weight of water is $9.81 \: kN/m^3$. ...

The notation “SC” as per Indian Standard Soil Classification System refers toSandy claySilty clayClayey siltClayey sand

An anisotropic soil deposit has coefficient of permeability in vertical and horizontal directions as $k_z$ and $k_x$, respectively. For constructing a flow net, the horiz...

Construction of a new building founded on a clayey soil was completed in January $2010$. In January $2014$, the average consolidation settlement of the foundation in clay...

Constant head permeability tests were performed on two soil specimens, $S1$ and $S$. The ratio of height of the two specimens $(L_{S1}: L_{S2})$ is $1.5$, the ratio of th...

A timber pile of length $8 \: m$ and diameter $0.2 \: m$ is driven with a $20 \: kN$ drop hammer, falling freely from a height of $1.5 \: m$. The total penetration of the...

A square footing of $2 \: m$ sides rests on the surface of a homogeneous soil bed having the properties: cohesion $c= 24 \: kPa$, angle of internal friction $\phi = 25^{\...

A strip footing is resting on the surface of a purely clayey soil deposit. If the width of the footing is doubled, the ultimate bearing capacity of the soilbecomes double...

The relationship between the specific gravity of sand $(G)$ and the hydraulic gradient $(i)$ to initiate quick condition in the sand layer having porosity of $30 \%$ is$G...

The results of a consolidation test on an undisturbed soil, sampled at a depth of $10 \: m$ below the ground level are as follows:$\begin{array}{lcl} \text{Saturated unit...

The atmospheric layer closest to the earth surface isthe mesospherethe stratospherethe thermospherethe troposphere

The seepage occurring through an earthen dam is represented by a flownet comprising of $10$ equipotential drops and $20$ flow channels. The coefficient of permeability of...

The soil profile at a site consists of a $5 \: m$ thick sand layer underlain by a $c - \phi$ soil as shown in figure. The water table is found $1 \: m$ below the ground l...

OMC-SP and MDD-SP denote the optimum moisture content and maximum dry density obtained from standard Proctor compaction test, respectively. OMC-MP and MDD-MP denote the o...

Water flows from P to Q through two soil samples, Soil $1$, Soil $2$, having cross sectional area of $80 \: cm^2$ as shown in the figure. Over a period of $15$ minutes, $...

A $4 \: m$ wide strip footing is founded at a depth of $1.5 \: m$ below the ground surface in a $c-\phi$ soil as shown in the figure. The water table is at a depth of $5....

In the consolidated undrained triaxial test on a saturated soil sample, the pore water pressure is zeroduring shearing stage onlyat the end of consolidation stage onlybot...

A fine grained soil is found to be plastic in the water content range of $26 – 48 \%$. As per Indian Standard Classification System, the soil is classified asCLCHCL-MLCI

A vertical cut is to be made in a soil mass having cohesion $c$, angle of internal friction $\phi$, and unit weight $\gamma$. Considering $K_a$ and $K_p$ as the cofficien...

The porosity (n) and the degree of saturation (S) of a soil sample are $0.7$ and $40 \%$ respectively. In a $100\:m^3$ volume of the soil, the volume (expressed in $m^3$)...

A homogeneous gravity retaining wall supporting a cohesionless backfill is shown in the figure. The lateral active earth pressure at the bottom of the wall is $40$ kPa.Th...

An undisturbed soil sample was taken from the middle of a clay layer (i.e., $1.5$ m below GL), as shown in figure. The water table was at the top of clay layer. Laborator...

A seepage flow condition is shown in the figure. The saturated unit weight of the soil $\gamma_{sat}=18 \: kN/m^3$. Using unit weight of water, $\gamma_w=9.81 \: kN/m^3$,...

A drained triaxial compression test on a saturated clay yielded the effective shear strength parameters as $c’=15$ kPa and $\phi’=22^{\circ}$. Consolidated Undrained tria...

Group I lists the type of gain or loss of strength in soils. Group II lists the property or process responsible for the loss or gain of strength in soils.$\begin{array}{l...

A soil sample is subjected to a hydrostatic pressure, $\sigma$. The Mohr circle for any point in the soil sample would bea circle of radius $\sigma$ and center at the ori...

A strip footing is resting on the ground surface of a pure clay bed having an undrained cohesion $c_u$. The ultimate bearing capacity of the footing is equal to$2 \pi \: ...

A uniformly distributed line road of $500 \: kN/m$ is acting on the ground surface. Based on Boussinesq’s theory, the ratio of vertical stress at a depth $2$ m to that at...

A $3 \: m$ thick clay layer is subjected to an initial uniform pore pressure of $145 \: kPa$ as shown in the figure.For the given ground conditions, the time (in days, ro...

The laboratory tests on a soil sample yields the following results: natural moisture content $=18 \%$, liquid limit $=60 \%$, plastic limit $=25 \%$, percentage of clay s...

It is proposed to drive H-piles up to a depth of $7$ m at a construction site. The average surface area of the H-pile is $3 \: m^2$ per meter length. The soil at the site...

The infinite sand slope shown in the figure is on the verge of sliding failure. The ground water table coincides with the ground surface. Unit weight of water $\gamma_w =...

A consolidated undrained $(\overline{CU})$ triaxial compression test is conducted on a normally consolidated clay at a confining pressure of $100$ kPa. The deviator stres...

If the water content of a fully saturated soil mass is $100\%$, the void ratio of the sample is:less than specific gravity of soilequal to specific gravity of soilgreater...

In friction circle method of slope stability analysis, if $r$ defines the radius of the slip circle, the radius of friction circle is:$r \sin \phi$$r$$r \cos \phi$$r \tan...

Net ultimate bearing capacity of a footing embedded in a clay stratumincreases with depth of footing onlyincreases with size of footing onlyincreases with depth and size ...

Surcharge loading required to be placed on the horizontal backfill of a smooth retaining vertical wall so as to completely eliminate tensile crack is:$2 \: c$$2 \: c \: k...