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The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering 61303 / 2010

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Page 1: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

The allowable bearing capacity will be the smaller of the following two conditions:

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 2: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

The settlement of a foundation can be divided into two major categories:

A- Elastic or immediate settlement

B- Consolidation settlement

dr. isam jardaneh / foundation engineering 61303 / 2010

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Time

Set

tlem

ent

Consolidation Settlement

Secondary Settlement

Immediate or Elastic Settlement

dr. isam jardaneh / foundation engineering 61303 / 2010

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For the calculation of foundation settlement, it is required to determine the vertical stress increase in the soil mass due to the load applied on the foundation.

This chapter is divided into the following three parts:

1. Procedure for calculation of vertical stress increase

2. Elastic settlement calculation

3. Consolidation settlement calculation

dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

Page 12: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 13: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 14: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

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Page 15: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 16: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

As suggested by Griffiths 1984, to find average pressure increase between z = H1 and z = H2 below the corner of a uniformly loaded rectangular area

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 17: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

Page 20: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 21: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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Page 29: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 30: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

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Page 32: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

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Page 34: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

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dr. isam jardaneh / foundation engineering 61303 / 2010

Continuous Footing

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dr. isam jardaneh / foundation engineering 61303 / 2010

Need Interpolation ???

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dr. isam jardaneh / foundation engineering 61303 / 2010

Page 39: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Range of Materials Parameters for Computing Settlement

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Page 44: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

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Page 46: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 47: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Page 48: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Example 1

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dr. isam jardaneh / foundation engineering 61303 / 2010

Example 2

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

(–

–

(–

–

(–

–

(–

–

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dr. isam jardaneh / foundation engineering 61303 / 2010

Page 58: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

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dr. isam jardaneh / foundation engineering 61303 / 2010

Problem # 1

Page 60: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

dr. isam jardaneh / foundation engineering 61303 / 2010

Problem # 2

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dr. isam jardaneh / foundation engineering 61303 / 2010

Problem # 3

Page 62: The allowable bearing capacity will be the smaller of …...The allowable bearing capacity will be the smaller of the following two conditions: dr. isam jardaneh / foundation engineering

Estimate the consolidation settlement of the clay layer shown in Figure below using 2:1 method and trapezoidal rule. Note 1 ton = 2000 lb.

dr. isam jardaneh / foundation engineering 61303 / 2010

Problem # 4

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