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