Forensic Engineering Examination of 11 Foot Diameter Sanitary Sewer

Abstract

An 11 Foot Diameter Sanitary Sewer Settled And Collapsed Leaving 7 Homes Damaged On The South Sidef 15 Mile Road In Sterling Heights, (North Detroit) Michigan. The Sewer Was 60 Feet Below The Groundurface, And Had Settled And Lost Overburden Material For Several Years Prior To The Major 2004 Collapse.He Main Depression Was 130 Feet Wide And 245 Feet Long With A Depth Of 30 Feet. The Sudden Collapsef The Surface Portion Was Over 10,000 Tons And Dropped Approximately 30 Feet. The Resulting Initialollapse Vibration Exceeded The Re-Construction Vibration And Was The Cause Of Ongoing Visible Damageo The 7 Homes Along The South Side Of The Roadway.