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MSE RETAINGIN WALLS

Pyramid builds M.S.E. (Mechanically Stabilized Earth) walls, which consist of a facing element combined with horizontal soil reinforcement to retain backfilled and compacted soil. M.S.E. walls may be constructed as a cost-effective alternative to gravity wall structures and are ideal where steeper slopes are desirable, as with bridge abutments and wing-walls.

 

  MSE wall along the KCICON project

Owner: Kansas Department of Transportation

Team Members: Pyramid Contractors Inc. 

Project Cost: $13.6 million

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Overview:

Replace deteriorated sections of a wall that supports Route 169’s northbound lanes; fix bridges that support the southbound lanes; repair guard rail and barrier; and replace drainage between the northbound and southbound lanes, which will resolve the highway’s problems for the long term.

Nearly 60 years ago, northbound Route 169 along the east bank of the Missouri River was a city road to the Downtown Airport. However, a solid road built on a levee made of dirt and sand presented challenges. The loose material must be kept in place so that the pavement remains solid and does not break apart.

A “bin wall” 12 feet high in some places was built to keep the underlying base in place and support the road. The bin wall is made up of corrugated steel panels. MoDOT took over this road in 1994, and in the last decade, those steel panels had rusted out enough that replacement is now necessary.

The removal and replacement of about a mile of bin wall holding up the east side of the northbound lanes, the repair and rehabilitation of the southbound lanes, and drainage improvements were performed in an unusually restricted area that has an active rail yard on the east and the Missouri River on the west.

Construction was completed 10/31/2012 several weeks ahead of the scehduled 12/16/2012 deadline.

  Mahaffie Street Extension

Owner: City of Olathe

Team Members: Pyramid Contractors Inc. 

Project Cost: $5,274,854.00

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Overview:

To allow for the continuing growth of the Garmin Headquarters in Olathe, Mahaffie Street was extended to provide a connection between Old-56 Highway and 151st Street.  With I-35 initially providing a barrier, the completion of the I-35 Bridge Extension Project, allowed for the new roadway corridor to be completed.  The Mahaffie Street Extension Project allowed for multiple access points to I-35, both to the North and to the South, helping to ease the congestion 151st Street and the complicated interchange between K-7, 151st Street and I-35.