Hot questions in Foundation Engineering / GO Civil

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41

GATE2016-2-41
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 level. The entire soil mass is retained by a concrete retaining wall and is ... the wall is smooth ans vertical. The total active earth pressure (expressed in $kN/m^2$) at point A as per Rankine's theory is __________

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...

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42

GATE2017 CE-1: 46
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 $3 \: m^2$ ... . The total axial frictional resistance (in kN, up to one decimal place) mobilized on the pile against the driving is _____________

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...

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43

GATE2014-1-15
The action of negative skin friction on the pile is to increase the ultimate load on the pile reduce the allowable load on the pile maintain the working load on the pile reduce the settlement of the pile

The action of negative skin friction on the pile is toincrease the ultimate load on the pilereduce the allowable load on the pilemaintain the working load on the pileredu...

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44

GATE2014-2-39
A single vertical friction pile of diameter $500$ mm and length $20$ m is subjected to a vertical compressive load. The pile is embedded in a homogeneous sandy stratum where; angle of internal friction $(\phi)=30^{\circ}$ ... $(K)=2.7$ and the bearing capacity factor $(N_q)=25$, the ultimate bearing capacity of the pile (in kN) is ________

A single vertical friction pile of diameter $500$ mm and length $20$ m is subjected to a vertical compressive load. The pile is embedded in a homogeneous sandy stratum wh...

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45

GATE2015-2-41
A $6$ m high retaining wall having a smooth vertical back face retains a layered horizontal backfill. Top $3$ m thick layer of the backfill is sand having an angle of internal friction. $\phi = 30^{\circ}$ while the bottom layer is $3$ m thick clay with cohesion, $c=20$ ... $150$ $216$ $156$ $196$

A $6$ m high retaining wall having a smooth vertical back face retains a layered horizontal backfill. Top $3$ m thick layer of the backfill is sand having an angle of int...

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46

GATE Civil 2013 | Question: 53
A multistory building with a basement is to be constructed. The top $4$ m consists of loose silt, below which dense sand layer is present up to a great depth. Ground water table is at the surface. The foundation consists of the basement slab of $6$ ... and rigidity corrections, the immediate settlement of the dense sand layer will be $58$ mm $111$ mm $126$ mm $179$ mm

A multistory building with a basement is to be constructed. The top $4$ m consists of loose silt, below which dense sand layer is present up to a great depth. Ground wate...

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Milicevic3306 asked Mar 25, 2018

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47

GATE2016-2-12
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 $G=0.7i+1$ $G=1.43i-1$ $G=1.43i+1$ $G=0.7i-1$

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...

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48

GATE2017 CE-1: 10
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 $2 \pi \: c_u$ $\pi \: c_u$ $( \pi +1) \: c_u$ $(\pi + 2) \: c_u$

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 \: ...

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49

GATE2015-1-40
A $20$ m thick clay layer is sandwiched between a silty sand layer and a gravelly sand layer. The layer experiences $30$ mm settlement in $2$ ... of consolidation of the layer is $0.003 \: cm^2/s$, the deposit will experience a total of $50$ mm settlement in the next _____ years.

A $20$ m thick clay layer is sandwiched between a silty sand layer and a gravelly sand layer. The layer experiences $30$ mm settlement in $2$ years.Given:$T_v = \begin{ca...

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50

GATE2017 CE-1: 11
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 $4$ m, right below the line of loading, is $0.25$ $0.5$ $2.0$ $4.0$

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 ...

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51

GATE2017 CE-1: 47
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 $\gamma_w = 9.81 \: kN/m^3$. The value of the effective angle of internal friction (in degrees, up to one decimal place) of the sand is ________.

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 =...

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52

GATE Civil 2012 | Question: 48
The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are: permeability coefficient $0.09 \: m/day$ (isotropic), specific gravity $=2.70$ and void ratio $0.85$. The sheet pile wall and the bottom of the soil are impermeable. The seepage loss (in $m^3$ per day per unit length of the wall) of water is $0.33$ $0.38$ $0.43$ $0.54$

The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are: permeability coefficient $0.09 \: m/day$ (isotropic), specific gravity $=2.7...

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53

GATE2016-1-13
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 $K_p$ ... $\dfrac{4c \sqrt{K_a}}{\gamma } \\$ $\dfrac{4c}{\gamma \sqrt{K_a}}$

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...

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54

GATE2015-1-14
In an unconsolidated undrained triaxial test, it is observed that an increase in cell pressure from $150$ kPa to $250$ kPa leads to a pore pressure increase $80$ kPa. It is further observed that, an increase of $50$ kPa in deviatoric stress results in an increase of $25$ kPa in the pore pressure. The value of $\textit{Skempton’s pore pressure parameter B}$ is $0.5$ $0.625$ $0.8$ $1.0$

In an unconsolidated undrained triaxial test, it is observed that an increase in cell pressure from $150$ kPa to $250$ kPa leads to a pore pressure increase $80$ kPa. It ...

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55

GATE2014-2-40
A circular raft foundation of $20$ m diameter and $1.6$ m thick is provided for a tank that applies a bearing pressure of $110$ kPa on sandy soil with Young’s modulus, $E_s’=30$ MPa and Poisson’s ratio, $v_s=0.3$. The raft is made of concrete ($E_c=30$ GPa and $v_c=0.15$). Considering the raft as rigid, the elastic settlement (in mm) is $50.96$ $53.36$ $63.72$ $66.71$

A circular raft foundation of $20$ m diameter and $1.6$ m thick is provided for a tank that applies a bearing pressure of $110$ kPa on sandy soil with Young’s modulus, ...

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56

GATE Civil 2012 | Question: 37
A layer of normally consolidated, saturated silty clay of $1$ m thickness is subjected to one dimensional consolidation under a pressure increment of $20$ kPa. The properties of the soil are: specific gravity $=2.7$, natural moisture content $=45 \%$, compression ... the primary consolidation settlement (rounded off to the nearest mm) is $2$ mm $9$ mm $14$ mm $16$ mm

A layer of normally consolidated, saturated silty clay of $1$ m thickness is subjected to one dimensional consolidation under a pressure increment of $20$ kPa. The proper...

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57

GATE Civil 2013 | Question: 15
Four columns of a building are to be located within a plot size of $10 \: m \times 10 \: m$. The expected load on each column is $4000$ kN. Allowable bearing capacity of the soil deposit is $100 \: kN/m^2$. The type of foundation best suited is isolated footing raft foundation pile foundation combined footing

Four columns of a building are to be located within a plot size of $10 \: m \times 10 \: m$. The expected load on each column is $4000$ kN. Allowable bearing capacity of ...

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58

GATE Civil 2013 | Question: 25
The latitude and departure of a line AB are $+78$ m and $-45.1$ m respectively. The whole circle bearing of the line AB is $30^{\circ}$ $150^{\circ}$ $210^{\circ}$ $330^{\circ}$

The latitude and departure of a line AB are $+78$ m and $-45.1$ m respectively. The whole circle bearing of the line AB is $30^{\circ}$$150^{\circ}$$210^{\circ}$$330^{\ci...

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59

GATE Civil 2012 | Question: 49
The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are: permeability coefficient $0.09 \: m/day$ (isotropic), specific gravity $=2.70$ and void ratio $=0.85$. The sheet pile wall and the bottom of the soil are impermeable. The factor of safety against the occurrence of piping failure is $3.55$ $2.93$ $2.60$ $0.39$

The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are: permeability coefficient $0.09 \: m/day$ (isotropic), specific gravity $=2.7...

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60

GATE2014-1-13
The degree of disturbance of the sample collected by the sampler is expressed by a term called the “area ratio”. If the outer diameter and inner diameter of the sampler are $D_o$ and $D_i$ respectively, the area ratio is given by $\dfrac{D_o^2-D_i^2}{D_i^2} \\$ $\dfrac{D_i^2-D_o^2}{D_i^2} \\$ $\dfrac{D_o^2-D_i^2}{D_o^2} \\$ $\dfrac{D_i^2-D_0^2}{D_o^2}$

The degree of disturbance of the sample collected by the sampler is expressed by a term called the “area ratio”. If the outer diameter and inner diameter of the sampl...

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61

GATE Civil 2012 | Question: 15
An embankment is to be constructed with a granular soil (bulk unit weight $=20 \: kN/m^3$) on a saturated clayey silt deposit (undrained shear strength $=25$ kPa). Assuming undrained general shear failure and bearing capacity factor of $5.7$, the maximum height (in m) of the embankment at the point of failure is $7.1$ $5.0$ $4.5$ $2.5$

An embankment is to be constructed with a granular soil (bulk unit weight $=20 \: kN/m^3$) on a saturated clayey silt deposit (undrained shear strength $=25$ kPa). Assumi...

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62

GATE2018 CE-2: 18
The initial concavity in the load-penetration curve of a CBR test is NOT due to uneven top surface high impact at start of loading inclined penetration plunger soft top layer of soaked soil

The initial concavity in the load-penetration curve of a CBR test is NOT due touneven top surfacehigh impact at start of loadinginclined penetration plungersoft top layer...

gatecse

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gatecse asked Feb 17, 2018

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63

GATE2018 CE-1: 47
A rigid smooth retaining wall of height $7$ m with vertical backface retains saturated clay ass backfill. The saturated unit weight and undrained cohesion of the backfill are $17.2 \: kN/m^3$ and $20 \: kPa$, respectively. The difference in the active ... ( in $kN$ per meter length of wall, up to two decimal places), before and after the occurrence of tension crack is _____

A rigid smooth retaining wall of height $7$ m with vertical backface retains saturated clay ass backfill. The saturated unit weight and undrained cohesion of the backfill...

gatecse

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gatecse asked Feb 17, 2018

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64

GATE2018 CE-2: 32
A $3$ m high vertical earth retaining wall retains a dry granular backfill with angle of internal friction of $30^{\circ}$ and unit weight of $20 \: kN/m^3$. If the wall is prevented from yielding (no movement), the total horizontal thrust (in kN per unit length) on the wall is $0$ $30$ $45$ $270$

A $3$ m high vertical earth retaining wall retains a dry granular backfill with angle of internal friction of $30^{\circ}$ and unit weight of $20 \: kN/m^3$. If the wall...

gatecse

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gatecse asked Feb 17, 2018

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65

GATE2018 CE-1: 10
The percent reduction in the bearing capacity of a strip footing resting on sand under flooding condition (water level at the base of the footing) when compared to the situation where the water level is at a depth much greater than the width of footing, is approximately $0$ $25$ $50$ $100$

The percent reduction in the bearing capacity of a strip footing resting on sand under flooding condition (water level at the base of the footing) when compared to the si...

gatecse

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gatecse asked Feb 17, 2018

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66

GATE2018 CE-1: 11
The width of a square footing and the diameter of a circular footing are equal. If both the footings are placed on the surface of sandy soil, the ratio of the ultimate bearing capacity of circular footing to that of square footing will be $4/3$ $1$ $3/4$ $2/3$

The width of a square footing and the diameter of a circular footing are equal. If both the footings are placed on the surface of sandy soil, the ratio of the ultimate be...

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gatecse asked Feb 17, 2018

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67

GATE2018 CE-2: 9
The contact pressure and settlement distribution for a footing are shown in the figure. The figure corresponds to a rigid footing on a granular soil flexible footing on a granular soil flexible footing on saturated clay rigid footing on cohesive soil

The contact pressure and settlement distribution for a footing are shown in the figure.The figure corresponds to arigid footing on a granular soilflexible footing on a g...

gatecse

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68

GATE2018 CE-2: 45
A group of nine piles in a $ 3 \times 3$ square pattern is embedded in a soil strata comprising dense sand underlying recently filled clay layer, as shown in the figure. The perimeter of a individual pile is $126$ cm. The size of pile group is $240$ ... of $16 \: kN/m^3$. The negative frictional load (in kN, up to two decimal places) acting on the pile group is _____

A group of nine piles in a $ 3 \times 3$ square pattern is embedded in a soil strata comprising dense sand underlying recently filled clay layer, as shown in the figure. ...

gatecse

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gatecse asked Feb 17, 2018

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69

GATE2018 CE-1: 31
A $0.5 \: m \times 0.5 \: m$ square concrete pile is to be driven in a homogeneous clayey soil having undrained shear strength $c_u=50 \: kPa$ and unit weight, $\gamma = 18.0 \: kN/m^3$. The design capacity of the pile $500$ kN. The adhesion factor $\alpha$ is given as ... pile required for the above design load with a factor of safety of $2.0$ is $5.2$ m $5.8$ m $11.8$ m $12.5$ m

A $0.5 \: m \times 0.5 \: m$ square concrete pile is to be driven in a homogeneous clayey soil having undrained shear strength $c_u=50 \: kPa$ and unit weight, $\gamma = ...

gatecse

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gatecse asked Feb 17, 2018

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