Other Excavation Bracing/Specialty Excavation ProjectsOther Excavation Bracing/Specialty Excavation Projects

R.C. Crawford, IncR.C. Crawford, Inc

Nashville WWTP 1993 ProgramNashville WWTP 1993 Program MA Mortenson, Prime MA Mortenson, Prime

ContractorContractor► Scope of work included the Scope of work included the

installation of 80K Tiebacks installation of 80K Tiebacks along existing Soldier Pile and along existing Soldier Pile and lagging wall installed by the lagging wall installed by the prime contractor. prime contractor.

► First installation occurred First installation occurred fall/winter 1992 and was fall/winter 1992 and was completed within 3 weeks completed within 3 weeks

► Used 8” augured double Used 8” augured double grouted tiebacks with 1” grade grouted tiebacks with 1” grade 160 Williams rods.160 Williams rods.

► Used Prefabricated double Used Prefabricated double channel walers channel walers

► Program expanded due to Program expanded due to changed excavation limits and changed excavation limits and additional Tiebacks /cap waler additional Tiebacks /cap waler was placed along an extended was placed along an extended sheet pile wale. sheet pile wale.

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc University of TennesseeUniversity of Tennessee Pedestrian /Steam Service TunnelPedestrian /Steam Service Tunnel Grinder Brothers, Prime ContractorGrinder Brothers, Prime Contractor

► Scope of work includes Excavation , Scope of work includes Excavation , excavation bracing , compaction of subgrade , excavation bracing , compaction of subgrade , and placement of seal slabs for urban site. and placement of seal slabs for urban site.

► Site conditions required reduced size Site conditions required reduced size equipment for access, flexible design to work equipment for access, flexible design to work around older abandoned work from 1972 around older abandoned work from 1972 classroom construction, and phased street classroom construction, and phased street crossing to maintain flow along a major street.crossing to maintain flow along a major street.

► Work placed in three phasesWork placed in three phases Phase One included excavation and braced Phase One included excavation and braced

support of new north entry plaza to tunnel support of new north entry plaza to tunnel system . Tangent soldier piles with system . Tangent soldier piles with internally braced concrete capinternally braced concrete cap

Phase Two included the excavation and Phase Two included the excavation and braced support of off-street portion of braced support of off-street portion of steam tunnel and south utility rooms. Work steam tunnel and south utility rooms. Work progress south narrow alley with hostile progress south narrow alley with hostile property owners on south perimeter. property owners on south perimeter. Tangent Cantilever soldier piles used as no Tangent Cantilever soldier piles used as no opportunity to brace was available either opportunity to brace was available either internally or tiebacks.internally or tiebacks.

Phase Three required the closure of tunnels Phase Three required the closure of tunnels to entry plaza under a major street with to entry plaza under a major street with significant utility conflicts. Bracing was significant utility conflicts. Bracing was accomplished by use of Soldier piles and accomplished by use of Soldier piles and lagging with internal pipe strut support. lagging with internal pipe strut support. Four major utilities crossing required Four major utilities crossing required support with needle beams and girders support with needle beams and girders supported by pile foundations.supported by pile foundations.

Final Work included the demolition/removal Final Work included the demolition/removal of all systems a minimum of 3’ below of all systems a minimum of 3’ below grade. grade.

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc University of TennesseeUniversity of Tennessee Pedestrian /Steam Service TunnelPedestrian /Steam Service Tunnel Grinder Brothers, Prime ContractorGrinder Brothers, Prime Contractor

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc Memphis Packing CompanyMemphis Packing Company Mayer Construction CompanyMayer Construction Company Scope Of Work included Drilled Shafts to support Scope Of Work included Drilled Shafts to support

super-structure and excavation /bracing of 30’ super-structure and excavation /bracing of 30’ deep wetwell for plant sludge recovery.deep wetwell for plant sludge recovery.

Used tangent wall system with “bar Joist Used tangent wall system with “bar Joist Reinforcement . Under reamed piers were placed Reinforcement . Under reamed piers were placed within ht tangent wall system.within ht tangent wall system.

System was internally braced by ring beam System was internally braced by ring beam construction. construction.

Excavation was preformed using drilled shaft Excavation was preformed using drilled shaft equipment and final grade trimmed and cleanup equipment and final grade trimmed and cleanup mini 30HP mini-excavator and skip buckets.mini 30HP mini-excavator and skip buckets.

Minimal Dewatering system was installed in Minimal Dewatering system was installed in bridging stone base and abandoned in place bridging stone base and abandoned in place

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc City of MemphisCity of Memphis Cypress Creek Pump StationCypress Creek Pump Station G D Moore Construction Co. G D Moore Construction Co.

Prime ContractorPrime Contractor Scope Of Work included Drilled /H-Pile and Lagging Scope Of Work included Drilled /H-Pile and Lagging

earth support for excavation of new Sewage Pump earth support for excavation of new Sewage Pump Station, Structural Excavation and Backfill of lift Station, Structural Excavation and Backfill of lift station construction. station construction.

Used Steel Wide Flange Beams installed in 24” Used Steel Wide Flange Beams installed in 24” Drilled shafts with Filter media backfill to allow for Drilled shafts with Filter media backfill to allow for drainage of overlaying strata. drainage of overlaying strata.

System was internally braced using struts and System was internally braced using struts and corner braces. Braces were removed after corner braces. Braces were removed after placement of concrete chambers to allow for clear placement of concrete chambers to allow for clear placement of packaged pump station.. placement of packaged pump station..

Excavation was preformed using combination of 2 Excavation was preformed using combination of 2 cy track hoe and mini-Excavator to work lagging cy track hoe and mini-Excavator to work lagging placement.placement.

All Bracing extracted at completion to prevent All Bracing extracted at completion to prevent interferences for incoming and outgoing deep interferences for incoming and outgoing deep sewers. sewers.

Dewatering system was installed using Reverse Dewatering system was installed using Reverse rotary drilling and 8” PVC casing and Screen.rotary drilling and 8” PVC casing and Screen.

4 Similar Projects Completed reusing most of the 4 Similar Projects Completed reusing most of the extracted Bracing/lagging to gain economy/extracted Bracing/lagging to gain economy/

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc A O Smith- Milan TennesseeA O Smith- Milan Tennessee New Press Line FoundationsNew Press Line Foundations Rentenbach Constructors Co. Rentenbach Constructors Co.

Prime ContractorPrime Contractor Scope Of Work included installation of tangent Scope Of Work included installation of tangent

soldier piles and excavation of press pit. soldier piles and excavation of press pit. Work complete inside of an operating stamping Work complete inside of an operating stamping

mill.mill. Excavation Bracing designed to withstand shocks Excavation Bracing designed to withstand shocks

from adjacent stamping mills with minimal ground from adjacent stamping mills with minimal ground movement. movement.

All work completed within 25’ headroom and All work completed within 25’ headroom and required a stubby crane boom attachment. required a stubby crane boom attachment.

Crane attachment used for work required a Crane attachment used for work required a modified bridge as well as special short augers modified bridge as well as special short augers during the work. during the work.

Bracing Installation . Supports , and struts installed Bracing Installation . Supports , and struts installed within 2 weeks, Remaining work completed and within 2 weeks, Remaining work completed and billed within 45 days keeping to aggressive billed within 45 days keeping to aggressive construction turnaround schedule demanded by construction turnaround schedule demanded by client.client.

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc Consolidated Freightways Consolidated Freightways

Memphis, TennesseeMemphis, Tennessee Retaining Wall ReplacementRetaining Wall Replacement R. C. Crawford, Inc. /H and M R. C. Crawford, Inc. /H and M

Construction Prime ContractorsConstruction Prime Contractors Scope Of Work included removal of existing Scope Of Work included removal of existing

stacked timber wall , re-grading of site to allow for stacked timber wall , re-grading of site to allow for install of steel framed support. install of steel framed support.

Once framework was installed a reconstructed Once framework was installed a reconstructed Timber wall face was placed at original lines and Timber wall face was placed at original lines and grades. grades.

Additional back of wall drainage system was Additional back of wall drainage system was installed to enhance the collection of Leachatte installed to enhance the collection of Leachatte from adjacent landfill.from adjacent landfill.

All steel prepped by hot galvanized process and All steel prepped by hot galvanized process and repainted in the field to cover welds and bolt repainted in the field to cover welds and bolt punching with epoxy paint.punching with epoxy paint.

Selected Areas of wall backfill required the use of Selected Areas of wall backfill required the use of No-Fines Concrete to allow for the excessive No-Fines Concrete to allow for the excessive leachatte runoff.leachatte runoff.

Steel frame work supported by embedded H-pile in Steel frame work supported by embedded H-pile in concrete drilled shafts.concrete drilled shafts.

Design of all work supervised by owners Engineer Design of all work supervised by owners Engineer of Record.of Record.

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc Bunge CorporationBunge Corporation Port Improvements St. Charles Port Improvements St. Charles

ArkansasArkansas

► Scope of work includes Excavation , Scope of work includes Excavation , permanent tied back H-pile Retaining permanent tied back H-pile Retaining wall and slope restoration for new wall and slope restoration for new grain silos and loading facilities on grain silos and loading facilities on the St Francis Riverthe St Francis River

► Site conditions required that Site conditions required that installations be worked around and installations be worked around and existing loading bridge and silos.existing loading bridge and silos.

► Scope of work included 40’ H-Piles Scope of work included 40’ H-Piles Installed in Drilled Shafts to avoid Installed in Drilled Shafts to avoid vibrations. vibrations.

► Bracing consisted of 60K working Bracing consisted of 60K working load tiebacks up to 55’ deep. load tiebacks up to 55’ deep. Permanent corrosion protection Permanent corrosion protection provided by use of coal tar epoxy provided by use of coal tar epoxy and re-grout of tendons. (2 level)and re-grout of tendons. (2 level)

► Lagging consisted of new 7x9 oak Lagging consisted of new 7x9 oak creosote timbers.creosote timbers.

► Design of project by othersDesign of project by others

Other Excavation Bracing/Specialty Excavation Other Excavation Bracing/Specialty Excavation ProjectsProjects

R.C. Crawford, IncR.C. Crawford, Inc Taylor Forge- Gulf And WesternTaylor Forge- Gulf And Western Re-tooling Plant to Pipe Flange Re-tooling Plant to Pipe Flange

ProductionProduction

► Scope of work includes Scope of work includes Demolition/Excavation , excavation Demolition/Excavation , excavation bracing, and pile foundations for new bracing, and pile foundations for new press pits and rolling mills as part of press pits and rolling mills as part of re-tooling of a plant.re-tooling of a plant.

► Site conditions required that Site conditions required that installations be coordinated around installations be coordinated around the final production runs of existing the final production runs of existing mill and required that site be mill and required that site be dewatered to lower water table dewatered to lower water table approximately 16’ to allow for dry approximately 16’ to allow for dry placement of structures.placement of structures.

► Excavation tracing required special Excavation tracing required special design to work around massive press design to work around massive press pits to remain in place as well as pits to remain in place as well as support of building/crane columns for support of building/crane columns for ring rolling mill.. ring rolling mill..

► Other miscellaneous foundations Other miscellaneous foundations installed included Bliss Press, 4000 T installed included Bliss Press, 4000 T Press, Pretreatment heaters, and Press, Pretreatment heaters, and miscellaneous material handlers.miscellaneous material handlers.