The void ratio of a clay soil sample M decreased from 0.575 to 0.510 when the applied pressure is increased from 120 kPa to 180 kPa. For the same increment in pressure, the void ratio of another clay soil sample N decreases from 0.600 to 0.550. If the ratio of hydraulic conductivity of sample M to sample N is 0.125, then the ratio of coefficient of consolidation of sample M to sample N (round off to three decimal places) is \(\underline{\hspace{1cm}}\).
Show Hint
Correct Answer: 0.09
Solution and Explanation
Top Questions on One-dimensional consolidation
The soil profile at a construction site is shown in the figure (not to scale). Ground water table (GWT) is at 5 m below the ground level at present. An old well data shows that the ground water table was as low as 10 m below the ground level in the past. Take unit weight of water, \( \gamma_w = 9.81 \, \text{kN/m}^3 \).
The overconsolidation ratio (OCR) (round off to two decimal places) at the mid-point of the clay layer is \(\underline{\hspace{1cm}}\).
- GATE CE - 2021
- Geotechnical Engineering
- One-dimensional consolidation
- A clay layer of thickness \( H \) has a preconsolidation pressure \( p_c \) and an initial void ratio \( e_0 \). The initial effective overburden stress at the mid-height of the layer is \( p_0 \). At the same location, the increment in effective stress due to applied external load is \( \Delta p \). The compression and swelling indices of the clay are \( C_c \) and \( C_s \), respectively. If \( p_0 < p_c < (p_0 + \Delta p) \), then the correct expression to estimate the consolidation settlement \( s_c \) of the clay layer is
- GATE CE - 2021
- Geotechnical Engineering
- One-dimensional consolidation
The soil profile at a road construction site is as shown in figure (not to scale). A large embankment is to be constructed at the site. The ground water table (GWT) is located at the surface of the clay layer, and the capillary rise in the sandy soil is negligible. The effective stress at the middle of the clay layer after the application of the embankment loading is 180 kN/m\(^2\). Take unit weight of water, \( \gamma_w = 9.81 \, \text{kN/m}^3 \).
- GATE CE - 2021
- Geotechnical Engineering
- One-dimensional consolidation
Questions Asked in GATE CE exam
- The President, along with the Council of Ministers, ............. to visit India next week.
- GATE CE - 2025
- Subject Verb Agreement
Consider a five-digit number PQRST that has distinct digits P, Q, R, S, and T, and satisfies the following conditions:
1. \( P<Q \)
2. \( S>P>T \)
3. \( R<T \)
If integers 1 through 5 are used to construct such a number, the value of P is:
- GATE CE - 2025
- Logical and Analytical Reasoning Skills
- Given the following staff readings at two levels, determine the Reduced Level (RL) of B.
Given: - RL of A = 150 m - Find RL of B- GATE CE - 2025
- Surveying and Levelling
- Given the bearing N30°W, determine the corresponding Whole Circle Bearing (WCB). \
Given: - Bearing = N30°W - Find WCB- GATE CE - 2025
- Surveying and Levelling
- Given the following data, determine the final water content \( W_2 \):
Given: - \( W_1 = 18\% \) - \( G_p = 2.74 \) - \( S_1 = 0.65 \) - \( S_2 = 0.852 \) - Find \( W_2 \)- GATE CE - 2025
- Soil Mechanics