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7.16 A 650-kN column load is supported on a 1.5-m wide by 2.0-m long by 0.5 m deep spread footing. The soil below is a well graded, normally consolidated sand with y = 17.0 kN/m' and the following SPT N60 values: Depth (m) 1.0 2.0 3.0 4.0 5.0 N60 12 13 13 18 22 The groundwater table is at a depth of 25 m. Using Schmertmann's method and hand compu- tations, compute the total settlement at t = 30 yr.

7.16 A 650-kN column load is supported on a 1.5-m wide by 2.0-m long by 0.5 m deep spread footing. The soil below is a well graded, normally consolidated sand with y = 17.0 kN/m' and the following SPT N60 values: Depth (m) 1.0 2.0 3.0 4.0 5.0 N60 12 13 13 18 22 The groundwater table is at a depth of 25 m. Using Schmertmann's method and hand compu- tations, compute the total settlement at t = 30 yr.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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**Problem Statement:** A 650-kN column load is supported on a footing that is 1.5 meters wide, 2.0 meters long, and 0.5 meters deep. The soil beneath this footing is well-graded, normally consolidated sand with a unit weight (γ) of 17.0 kN/m³. The Standard Penetration Test (SPT) values corrected for overburden pressure (\(N_{60}\)) are given for various depths as follows: | Depth (m) | 1.0 | 2.0 | 3.0 | 4.0 | 5.0 | |-----------|-----|-----|-----|-----|-----| | \(N_{60}\)| 12 | 13 | 13 | 18 | 22 | The groundwater table is located at a depth of 25 meters. Using Schmertmann’s method and hand computations, determine the total settlement after 30 years. **Solution Approach:** To solve this problem, you will use Schmertmann’s method to compute the settlement of the sand over the given period. This method considers various factors, including soil compressibility, footing shape, and load conditions. Based on the provided \(N_{60}\) values, determine the immediate and long-term settlements by evaluating the compressibility and consolidation characteristics of the sand.
Transcribed Image Text:**Problem Statement:** A 650-kN column load is supported on a footing that is 1.5 meters wide, 2.0 meters long, and 0.5 meters deep. The soil beneath this footing is well-graded, normally consolidated sand with a unit weight (γ) of 17.0 kN/m³. The Standard Penetration Test (SPT) values corrected for overburden pressure (\(N_{60}\)) are given for various depths as follows: | Depth (m) | 1.0 | 2.0 | 3.0 | 4.0 | 5.0 | |-----------|-----|-----|-----|-----|-----| | \(N_{60}\)| 12 | 13 | 13 | 18 | 22 | The groundwater table is located at a depth of 25 meters. Using Schmertmann’s method and hand computations, determine the total settlement after 30 years. **Solution Approach:** To solve this problem, you will use Schmertmann’s method to compute the settlement of the sand over the given period. This method considers various factors, including soil compressibility, footing shape, and load conditions. Based on the provided \(N_{60}\) values, determine the immediate and long-term settlements by evaluating the compressibility and consolidation characteristics of the sand.
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