A foundation 15 ft x 20 ft is proposed near an existing one, 10 ft x 15 ft as shown in the figure below. Determine the following: (A) The vertical total stress increase at A, B, and C at a depth of 4 ft below the ground surface of the existing foundation before construction of the proposed foundation.(B) The vertical total stress increase at A, B, and C at a depth of 4 ft below the ground surface of the existing foundation from the construction of the proposed foundation.

A reinforced concrete frame is founded on square footing resting on a compacted gravel raft as shown in the figure below. Find the minimum width of the footing in m such as the increase in vertical total stress at the interface between the gravel raft and the natural soil does not exceed 80 kPa after construction. For this question, use the 2 to 1 method and neglect the weight of the foundation. (acceptable tolerance = 2%).

In the following example, a rectangular foundation must be designed whose B/L ratio must be equal to 0.5.The ultimate allowable load Qadm that must be transmitted to the ground is 520 KN, using a safety factor of 2.0. Designing with Meyerhoff theory, assume that the soil undergoes a general shear failure process. For this problem, propose values of B and L that meet the B/L ratio until Qadm is found to be equal to 520 kN.

For a construction project, the ground surface at a building location is lowered 5 ft. A 4-ft square footing (4 ft by 4 ft) imposing a bearing pressure of 4,000 psf is then constructed at the level of the new surface. What net stress increase results in the soil mass 4 ft below the center of the foundation? Assume that the soil unit weight is 120 pcf.

Refer to Figure 5.2 and consider a rectangular foundation. Given: B = 1.5 m, L = 2.5 m, Df = 1.2 m, H = 0.9 m, Φ' = 40º, c' = 0, and γ = 17 kN/m3. Using a factor of safety of 3, determine the gross allowable load the foundation can carry. Use Eq. (5.3).

Question 01. Using the Fadum chart provided, calculate the total vertical stress due to 200 kPa uniform contact pressure at a depth of 6m below point A for the rectangular raft foundation as per Question 1 part of the attached image. L1 = 7m L2 = 3m B1 = 9m B2 = 4m   Question 02. A section of the proposed foundation in Question 01 has an obstruction. A redesign is carried out as shown in Question 2 part of the attached image. The original proposed footprint was maintained, and the section removed from the design has a width of B3 = 2mCalculate the total vertical stress at the same depth below A and the same uniform pressure in Question 01.

10- Which of the following statement is NOT correct for shallow foundation? (a) Bearing capacity depends on foundation size (b) For sandy soils; bearing capacity should only be estimated using effective stress analysis (c) For clay soils; bearing capacity should be estimated using both total stress and effective analysis (d) Geometric factors do not depend on soil density

The soil for backfilling comes from a borrow pit. The water content of the soil in the borrow pit is 15% and its void ratio is 0.69. The swell index index is 1.2. The specification requires the backfill material to be compacted to a dry unit weight of 16 kN/m^3 1. What is the number of truckloads of soil required for the footing foundation? 2. What is the weight of dry soil in one truck load? 3. What is the weight of water per truck load? 4. What is the degree of saturation of the soil in situation Please answer. Thank you! Guide in answering is in the picture. Thanks!

A mat foundation on saturated clay has plan view dimensions of 20 m x 30 m. Given that the gross allowable load is 60 MN, undrained shear strength of the clay is 60 kPa, and its unit weight is 18 kN/m3 find the depth of the fully compensated foundation. What depth of the mat foundation corresponds to the net factor of safety of 5? What is the gross factor of safety for this depth?