### Soil Properties and Load Capacity Analysis#### Table: Soil Properties by Depth| Depth (ft) | Soil Classification | Friction Angle φ' (deg) | Relative Density Dr | N60 | Unit Weight γ (lb/ft³) ||------------|----------------------|-------------------------|---------------------|-----|-----------------------|| 0-10.0 | Silty sand (SM) | 33 | 40% | 12 | 100 || 10.0-16.5 | Sandy silt (ML) | 31 | 50% | 16 | 110 || 16.5-35.0 | Fine to medium sand (SW) | 35 | 62% | 30 | 125 || 35.0-65.0 | Well-graded sand (SW) | 37 | 68% | 35 | 126 |#### DescriptionThe groundwater table is positioned at a depth of 15 ft, with all strata considered normally consolidated. The pile design is based on wave equation analysis, without the aid of on-site static load tests, dynamics tests, or indicator piles.- **Safety Factors**: - **Downward Loading**: 2.75 - **Upward Loading**: 5.5#### TaskCalculate the allowable downward and upward load capacities for each pile.This table and analysis are essential for understanding soil behavior and ensuring structural safety in construction and engineering projects. An industrial building is to be supported on a series of 14-in square prestressed concrete piles which will be driven 45 ft into the following soil profiles:

Given: Depth=15 ft To find: Qcb

Depth (ft) 0-10.0 10.0-16.5 16.5-35.0 35.0-65.0 Soil classification Silty sand (SM) Sandy silt (ML) Fine to medium sand (SW) Well-graded sand (SW) Friction angle ' (deg) 33 31 35 37 Relative density Dr 40% 50% 62% 68% N60 12 16 30 35 Unit weight y (1b/ft³) 100 110 125 126 The groundwater table is at a depth of 15 ft and all of the strata may be assumed to be normally consolidated. These piles have been designed without the benefit of any onsite static load tests, dynamics tests, or indicator piles, but a wave equation analysis has been performed. The factor of safety for downward loading is 2.75, and the factor of safety for upward loading is 5.5. Compute the allowable downward and upward load capacities of each pile.

Depth (ft) 0-10.0 10.0-16.5 16.5-35.0 35.0-65.0 Soil classification Silty sand (SM) Sandy silt (ML) Fine to medium sand (SW) Well-graded sand (SW) Friction angle ' (deg) 33 31 35 37 Relative density Dr 40% 50% 62% 68% N60 12 16 30 35 Unit weight y (1b/ft³) 100 110 125 126 The groundwater table is at a depth of 15 ft and all of the strata may be assumed to be normally consolidated. These piles have been designed without the benefit of any onsite static load tests, dynamics tests, or indicator piles, but a wave equation analysis has been performed. The factor of safety for downward loading is 2.75, and the factor of safety for upward loading is 5.5. Compute the allowable downward and upward load capacities of each pile.

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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