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Benchmarked Excavations - DeepEX

Additional Deep Excavation Case Studies


The following table provides basic information on additional case studied for deep excavations. The majority of the deep excavations are supported by slurry walls. Wall Types: RCDW: Reinforced Concrete Diaphragm Wall, SPTC: Soldier Pile & Tremie Wall, SPW: Sheet Pile Wall, SP: Soldier Pile and Lagging, TPW: Tangent Pile Wall, SMW: Soil Mix Wall

​Project Name

​Year

​RCDW

Exc. Depth (feet)

System System

​General Soil Conditions

​1982

​RCDW

27

​2 Lev. TB, R

​Fill, Org., Clay, Glacial Till

1985

​RCDW

​30

​2 Lev. TB

​Fill, Org., Clay, Glacial Till

​1987

​RCDW

​42

​4 Lev. TB

​Fill, Org., Clay, Glacial Till

​1971

​RCDW

​23 - 44

​1 Lev. TB

​Fill, Org., Clay, Glacial Till

​1973

RCDW/ SPTC

44

​1 Lev. TB and 1 Lev. R

​Fill, Org., Clay, Glacial Till

​1986

​RCDW/ SPTC

25

​1 Lev. TB, and 1 Lev. R

​Fill, Org., Clay, Glacial Till

1987

RCDW

​27

​3 Lev. Rakers

​Fill, Org., Clay, Glacial Till

1993

RCDW

23

​1 Lev. Tiebacks

​Fill, Org., Clay, Glacial Till

1996

​RCDW

34

​3 Lev. Tiebacks

​Fill and Stiffer Clays

1975

​RCDW

​32

​3 Lev. Tiebacks

​Fill, Glacio-Marine

1995

RCDW

​88

​6 Lev. Rakers

​Fill, Glacio-Marine, Bedrock

​1991

RCDW

​60

​5-Lev. Tiebacks

​Mixed Sands, Silts & Clays, Rock

2000

RCDW

​30

​1-Lev. TB, and 1 Lev. R

​Mixed Sands, Silts & Clays

1983

RCDW

​65

​6-Lev. Top/Down

​Fill, Org., Clay, Till, Bedrock

​Rowes Wharf (Boston MA)

1984

RCDW

55

​5-Lev. Top/Down

​Fill, Glacio-Marine, Bedrock


125 Summet Street Bldg. (Boston, MA)

1990

RCDW

60

​6-Lev. Top/Down

​Fill, Org., Clay, Till, Bedrock

1989

RCDW

​75

​7-Lev. Top/Down

​Fill, Org., Clay, Till, Bedrock

1994

RCDW

55

​7-Lev. Top/Down

​Fill, Org., Clay, Till, Bedrock

1998

RCDW

​55

​7-Lev. Top/Down

​Fill, Glacio-Marine, Bedrock

1989

RCDW

​35

​3-Lev. Top/Dow

​Fill, Org., Clay, Glacial Till

M.B.T.A. South Cove (Boston, MA)

​1973

RCDW

​53

​3-Lev. Cross Lot Braces

​Fill, Org., Clay, Till, Bedrock

​1989

RCDW

​47

​3-Lev. Cross Lot Braces

​Fill, Org.,Glacial Outwash, Glacial Till,

Petworth Subway Station (Washington, DC)

1995

RCDW

​60

​6-Lev. Cross Lot Braces

​Fill, Sands

​C.N.A Tower . Building (Chicago, IL

1970

RCDW

​31

​1 Lev. Rakers and Berms

​Fill, Org., Clay, Glacial Till

​Sears Tower (Chicago, IL)

1971

RCDW

​32

​3 Lev. Rakers and Berms

​Fill, Org., Clay, Glacial Till

​1999

RCDW

​66

​2 Lev. Struts, 1 Lev. Rak, (Alt Tieback)

​Fill, Org., Sand, Bay Mud.

2001

RCDW

​25 (7.5 m)

​1 Lev. TB

​Interbedded Clays & Silts


*Most of these case studies have been compiled through graduate research at MIT. We would like to recognize and thank all companies and individuals for their contributions, making such an extensive compilation possible. These include (but not limited), GEI consultans, Haley & Aldrich, STS consultants, Mueser Rutledge Consulting Engineers, Shnabel Foundattions, and Clark Foundations.

 

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