alternative to a soil nail wall · 2017-05-07 · alternative to a soil nail wall annual kansas...
TRANSCRIPT
Diego Plazas, EIT
Berkel & Company Contractors, Inc.
RAY COUNTY
ALTERNATIVE TO A SOIL NAIL WALL
Annual Kansas City Geotechnical Conference
Overland Park, Kansas
April 20,2017
Introduction
• Soil Nail Wall Route T
– Location
– Scope of work
– Geology
Soil Nail Wall
Wall 1300 lf
20602 sf
Approx. 824 Soil Nails total drilling of 12360 lf
Soil Nail Wall
Site Geology
Site Geology
Flat Missouri river flood
plain and the hilly
norther bluff. The river
plain consists of alluvial
sand and the bluff
consist of loess
overlying shale.
Constructions Challenges
• Sand on the east site of the construction limits
Constructions Challenges
• Sand on the east site of the construction limits
Constructions Challenges
• No impact to the BNSF operations and right of way
• Limited access for drill rig equipment
Constructions Challenges
Access for drill rigs and 12360 lf of drilling
Alternative Design
Alternative Design
110 tiebacks Average length 35 lf
Total drilling 3850
Constructions Challenges
• No need for temporary shoring
• Less material to be excavated
• Less backfill
Constructions Challenges
Constructions Challenges
• Sand on the east side of the construction limits
• Limited access for drill rig equipment
Soldier Beams
Soldier Pile Installation
Soldier Beams
Soldier Beams
Soldier Beams
Construction
• Existing Home Moved off Site for Construction
• 40 Foot Deep Excavation for Subterranean Structure
Site Soils
• Dense matrix of sand, gravel,
cobbles and boulders
Earth Retention System
• Soldier Pile & Wood Lagging System
• Internally Braced Excavation
Soldier Pile Drilling
• Installation with smaller overburden drill rig
• Same equipment utilized for micropile
installation
Soldier Pile Drilling
• Selection of Pipe Piles in lieu of
conventional Wide Flange Beams
• Install casing to maintain hole
stability
• Utilize casing as soldier pile
Pipe Soldier Piles & Wood Lagging
Winter
35 degrees
Backfill
Questions
Thanks