Bearing Capacity of Soils

CECW-EG Engineer Manual 1110-1-1905

Department of the Army

EM 1110-1-1905 30 October 1992

U.S. Army Corps of Engineers
Washington, DC 20314-1000

Engineering and Design BEARING CAPACITY OF SOILS

Distribution Restriction Statement
Approved for public release; distribution is unlimited.

CECW-EG Engineer Manual No. 1110-1-1905

DEPARTMENT OF THE ARMY U.S. Army Corps ofEngineers Washington, DC 20314-1000

EM 1110-1-1905

30 October 1992 Engineering and Design BEARING CAPACITY OF SOILS

1. Purpose. The purpose of this manual is to provide guidelines for calculation of the bearing capacity of soil under shallow and deep foundations supporting various types of structures and embankments. 2. Applicability. This manual applies to HQUSACE/OCE elements, major subordinatecommands, districts, laboratories, and field operating activities. 3. General. This manual is intended as a guide for determining allowable and ultimate bearing capacity. It is not intended to replace the judgment of the design engineer on a particular project.

FOR THE COMMANDER:

WILLIAM D. BROWN Colonel, Corps of Engineers Chief of Staff_______________________________________________________________________________ This manual supersedes EM 1110-2-1903, dated 1 July 1958.

CECW-EG Engineer Manual No. 1110-1-1905

DEPARTMENT OF THE ARMY U.S. Army Corps of Engineers Washington, DC 20314-1000

EM 1110-1-1905

30 October 1992 Engineering and Design BEARING CAPACITY OF SOILS Table of Contents

Subject CHAPTER 1 INTRODUCTION Purpose and Scope . . . . . . . . . Definitions. . . . . . . . . . . . Failure Modes . . . . . . . . . . . Factors Influencing Bearing Capacity

Paragraph

Page

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1-1 1-2 1-3 1-4

1-1 1-2 1-8 1-11

CHAPTER 2

NON-LOAD RELATED DESIGN CONSIDERATIONS General . . . . . . . . . . . . . . . Earthquake and Dynamic Motion . . . . Frost Action . . . . . . . . . . . . . Subsurface Voids .. . . . . . . . . . Expansive and Collapsible Soils . . . Soil Reinforcement . . . . . . . . . . Heaving Failure in Cuts . . . . . . . Soil Erosion and Seepage . . . . . . .

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2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8

2-1 2-1 2-1 2-3 2-3 2-4 2-6 2-8

CHAPTER 3

SOIL PARAMETERS Methodology . . . . . . . . . . . . . . . . .Site Investigation . . . . . . . . . . . . . . Soil Exploration . . . . . . . . . . . . . . . SHALLOW FOUNDATIONS Basic Considerations . . . . . . . . . Solution of Bearing Capacity . . . . . Retaining Walls . . . . . . . . . . . In Situ Modeling of Bearing Pressures Examples . . . . . . . . . . . . . . .

3-1 3-2 3-3

3-1 3-1 3-9

CHAPTER 4.

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4-1 4-2 4-3 4-4 4-5

4-1 4-1 4-16 4-16 4-19

CHAPTER 5

DEEP FOUNDATIONS Basic Considerations . . . . . . . . . . . . . Drilled Shafts Vertical Capacity of Single Shafts . . Capacity to Resist Uplift and Downdrag Lateral Load Capacity of Single Shafts Capacity of Shaft Groups . . . . . . .

5-1

5-1

Section I

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5-2 5-3 5-4 5-5

5-45-22 5-34 5-42

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EM 1110-1-1905 30 Oct 92 Subject Section II Driven Piles Effects of Pile Driving . . . . . . . . Vertical Capacity of Single Driven Piles Lateral Load Capacity of Single Piles . Capacity of Pile Groups . . . . . . . . REFERENCES BIBLIOGRAPHY COMPUTER PROGRAM Organization . . Applications . . Listing . . . . NOTATION AXILTR . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . Paragraph Page

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5-6 5-7 5-8 5-9

5-45 5-46 5-67 5-67 A-1 B-1

APPENDIX A APPENDIX B APPENDIX C

C-1 C-2 C-3

C-1 C-10 C-23 D-1

APPENDIX D

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EM 1110-1-1905 30 Oct 92

CHAPTER 1 INTRODUCTION 1-1. Purpose and Scope. This manual presents guidelines for calculation of the bearing capacity of soil under...