A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Injection Grouting Preserves Foundation Integrity of Multi-Story Buildings
Metropolitan Council Environmental Services (MCES) is responsible for collecting and treating wastewater from approximately 2.7 million residents in the Minneapolis-St. Paul metropolitan area. Due to population growth in the Twin Cities area, MCES determined additional wastewater infrastructure would be required to provide the capacity necessary to manage the increase in wastewater volumes. It was determined the construction of a 50 foot deep sanitary sewer lift station, modification of the gravity sewer alignments, and the addition of a 9,000 foot long force-main would provide the needed improvements to the existing infrastructure. Challenges encountered on this project included a multiple story commercial medical building, (Parkdale Center) which was constructed on shallow spread footing foundations within close proximity of the needed lift station and additional sanitary sewer lines. This issue was further compounded by the presence of shallow groundwater and loose granular alluvial soils that occurred to the depth underlying the existing building, as well as the lift station and sanitary sewer construction envelope. Due to the challenging subsurface conditions, dewatering with well points or the installation of vibratory sheet piles were likely to cause settlement of the soils near the surrounding buildings and therefore was ruled out as a construction option. To reduce the potential for settlement and control for groundwater, permeation grouting was determined the optimal construction solution. Groundwater was controlled through the use of acrylamide grout curtains around the lift station and manholes thus leaving the adjacent buildings unaffected.
Injection Grouting Preserves Foundation Integrity of Multi-Story Buildings
Metropolitan Council Environmental Services (MCES) is responsible for collecting and treating wastewater from approximately 2.7 million residents in the Minneapolis-St. Paul metropolitan area. Due to population growth in the Twin Cities area, MCES determined additional wastewater infrastructure would be required to provide the capacity necessary to manage the increase in wastewater volumes. It was determined the construction of a 50 foot deep sanitary sewer lift station, modification of the gravity sewer alignments, and the addition of a 9,000 foot long force-main would provide the needed improvements to the existing infrastructure. Challenges encountered on this project included a multiple story commercial medical building, (Parkdale Center) which was constructed on shallow spread footing foundations within close proximity of the needed lift station and additional sanitary sewer lines. This issue was further compounded by the presence of shallow groundwater and loose granular alluvial soils that occurred to the depth underlying the existing building, as well as the lift station and sanitary sewer construction envelope. Due to the challenging subsurface conditions, dewatering with well points or the installation of vibratory sheet piles were likely to cause settlement of the soils near the surrounding buildings and therefore was ruled out as a construction option. To reduce the potential for settlement and control for groundwater, permeation grouting was determined the optimal construction solution. Groundwater was controlled through the use of acrylamide grout curtains around the lift station and manholes thus leaving the adjacent buildings unaffected.
Injection Grouting Preserves Foundation Integrity of Multi-Story Buildings
Babcock, Britt N. (author)
Grouting 2017 ; 2017 ; Honolulu, Hawaii
Grouting 2017 ; 175-183
2017-07-06
Conference paper
Electronic Resource
English
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