1. A ten-story building is to be constructed at a site where the water table is close to the ground surface. The foundation of the building will be supported on 0.5 m diameter and of length 25 m concrete piles. The bottom of the pile cap will be at the ground level. The soil investigation at the site and laboratory tests have provided the saturated unit weights, the shear strength values under undrained conditions, and the soil profile of the soil. The soil profile and the other details are given in Table below. Required: a. Draw the soil-pile system. b. Determine the ultimate bearing capacity of a single pile. From 0 6.0 22 30 Depth To 6 22 30 40 Soil Sand Med. stiff clay Sand Stiff clay Y sat kN/m³ 19 18 19.6 18.5 0° 33 30 Cu kN/m² 60 - 75

1. A ten-story building is to be constructed at a site where the water table is close to the ground surface. The foundation of the building will be supported on 0.5 m diameter and of length 25 m concrete piles. The bottom of the pile cap will be at the ground level. The soil investigation at the site and laboratory tests have provided the saturated unit weights, the shear strength values under undrained conditions, and the soil profile of the soil. The soil profile and the other details are given in Table below. Required: a. Draw the soil-pile system. b. Determine the ultimate bearing capacity of a single pile. From 0 6.0 22 30 Depth To 6 22 30 40 Soil Sand Med. stiff clay Sand Stiff clay Y sat kN/m³ 19 18 19.6 18.5 0° 33 30 Cu kN/m² 60 - 75

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Pile Foundation

Section: Chapter Questions

Problem 18.13P

See similar textbooks

Similar questions

State the method to determine the N-value of soil and the normal N-value required for supporting friction piles
A rock storage pile is being designed for a mine in West Virginia. The pile is linedwith reinforced GCL overlain by a 1.5 mm thick HDPE geomembrane. A heavy nonwoven geotextile is placed on top of the geomembrane. Because the rock is porous(K = 10-2cm/s), it is used as the main LCS stone and no additional leachate collectionstone is being installed. Specify the base slope required to keep the head below 25cm if the design storm is 0.8 cm rain/day and the pipe-to-pipe lateral spacing is 60 mIs this rock a reasonable material to replace the LCS stone?
Pile foundation is proposed for 50 stories building in Dubai having a building foot print area of 20 m length and 20 m width and having a pile diameter of 800 mm and pile depth of 20 m near to the sea shore. The geotechnical investigation revealed a reclaimed land having the soil type mainly as well graded sand. The angle of shearing resistance was obtained by performing the direct shear testing as 36 degree. Use IS 2911 approach to obtain the feasibility of the construction of pile group foundation for this 50 storey building.
(B).Suppose we encountered a poor soil in behria during a house construction. Available options were Pre-loading & Vibro-flotation for improving its bearing capacity. How Pre-loading & vibroflotation would actually be carried out in the field?
Q1/ A five story office building are to be built in a deep, high quality fine-grained soil deposit. The bedrock has a depth of over 75 m. The foundation level will be located at a depth of 1 m below ground surface. At the foundation level, the unfactored uniformly distributed load (q) from the building structure is 70 kPa. The building will be 50 m wide and 85 m long. Estimate: (a) The required number, spacing and location of exploratory boreholes. (b) The required depth of the boreholes by a) AoD = 0.10 q and from Table 2, find the minimum depth.
Define the term critical void ratio.
1- Depth of BH. 2- Bearing capacity for the soil under the footing. ==> hansen method 3- Immediate settlement for the soil under footing. ==> Schmertmann's Method 4- Find the time required for 100% degree of consolidation
Q- 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 was recorded as 10 mm. The ultimate consolidation settlement was estimated in design as 40 mm. Considering double drainage to occur at the clayey soil site, find the expected consolidation settlement in January 2019.
Explain how the Mohr-Coulomb failure criterion is used to determine soil shear strength?
Rectangular footing (4m x 5m) was supported by a saturated clay layer with a thickness of 5m. If the second layer (below the clay) was a saturated sand. The settlement that could be occurred in this site: a. Is only consolidation settlement b. None of the given answers are correct c. Is a short term settlement d. Is only long term settlement
Please help me in answering the following practice questionsAt a site, it is planned that a circular grain silo will be constructed at the ground surface. The grain silo will be set on a rigid circular foundation that has a diameter of 6 meters. Assume that the silo will apply a concentric vertical load Q on top of the circular foundation and that the foundation will transfer this load to the top of the silty clay layer as a uniform vertical pressure q. The soil profile at this site is as follows (also shown in attached image): 9-m-deep silty clay layer underlain by bedrock Groundwater table located at a depth of 6 m from the horizontal ground surface, groundwater condition is hydrostatic. Silty clay layer Air-entry value (AEV) = 120 kPa Specific gravity GS = 2.72 Porosity n = 0.42 Average undrained shear strength su = 40 kPa Critical state friction angle Φ'C= 24 degrees (a) How can I compute pore-water pressure, total vertical stress, and effective vertical stress at point P…
H.W. Following are the results of a consolidation test: Pressure, p (kN/m) Void ratio, e 0.25 1.1 0.5 1.085 1.0 1.055 1.01 2.0 4.0 0.94 8.0 0.79 16.0 0.63 1-Plot the e-log P curve, then 2- Using Casagrande's method, determine the precosolidation pressure,Pc. 2- Calculate the compression index, Cc