Category:321 Geotechnical Engineering: Difference between revisions

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The geotechnical section provides geotechnical services for the department including laboratory and field testing as well as subsurface drilling. This section obtains and interprets the subsurface information needed to design highways and bridges. Soils and Geology personnel also investigate various geotechnical matters including foundation stability and settlement of embankments, slide corrections, subgrade and base stabilization, bridge and wall foundations, sinks and mine subsidence, and the use of new technology and products. Geotechnical serves as a contact regarding geotechnical problems, new products, specifications, training programs and implementation of new products and procedures. This section also participates in proficiency sample programs and inspections by the National Institute of Standards and Technology.
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<categorytree mode=all>321 Geotechnical Engineering</categorytree></div>


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|align="center" colspan="4" style="background:#D2B48C"| '''Geotechnical Engineering Guidelines'''
|-
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|[http://epg.modot.mo.gov/documents/321_Corelation_PI.pdf Correlation of Plasticity Index to Angle of Internal Friction] || 182k || rowspan="4" colspan="2"| [[Image:321 Drill in Creek.JPG | 500px]]
| style="text-align:center;" | '''<u>Reference Documents</u>'''
|-
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|[http://epg.modot.mo.gov/documents/321_Corebox.pdf Corebox] || 14k
| ● [https://epg.modot.org/documents/321_Geophysical_Methods_FHWA_1998.pdf Geophysical Methods FHWA 1998]  
|-
|-
|[http://epg.modot.mo.gov/documents/321_Field_Guide.pdf Field Guide] || 31k
| ● [https://www.fhwa.dot.gov/engineering/geotech/pubs/nhi16072.pdf Geotechnical Engineering Circular No. 5 - Geotechnical Site Characterization, FHWA 2016]  
|-
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|[http://epg.modot.mo.gov/documents/321_Fill_Slope_Guide.pdf Fill Slope Guide] || 16k
| ● [https://epg.modot.org/documents/321_Subsurface_Inv_Manual_FHWA.pdf Subsurface Investigation Manual FHWA 1997]  
|-
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|[http://epg.modot.mo.gov/documents/321_Geophysical_Methods_FHWA_1998.pdf Geophysical Methods FHWA 1998] || 598k || rowspan="5" | [[Image:321 Mine Map.JPG | 250px]] || rowspan="5" | [[Image:321 Driller.JPG | 250px]]
| ● [https://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06088.pdf Soils and Foundations Reference Manual - Volume I, FHWA 2006]
|-
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|[http://epg.modot.mo.gov/documents/321_Geotech_Section_Guidelines.pdf GeoTechnical Section Guidelines] || 1 meg 
| ● [https://www.fhwa.dot.gov/engineering/geotech/pubs/nhi06089.pdf Soils and Foundations Reference Manual - Volume II, FHWA 2006]
|-
|}
|[http://epg.modot.mo.gov/documents/321_Modified_State_Plane.pdf Modified State Plane] || 21k
 
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{| align="center"  
|[http://epg.modot.mo.gov/documents/321_MoDOT_Field_Log_Protocol.pdf MoDOT Field Log Protocol] || 97k
|-
|[http://epg.modot.mo.gov/documents/321_p-y_Curve_Criteria.pdf P-Y Curve Criteria] || 32k
|-
|[http://epg.modot.mo.gov/documents/321_RQD.pdf RQD] || 18k || rowspan="4" colspan="2" align="center" | [[Image:321 Slide.jpg | 500px]]
|-
|[http://epg.modot.mo.gov/documents/321_Seismic_Procedure.pdf Seismic Procedure] || 2.8 meg 
|-
|[http://epg.modot.mo.gov/documents/321_Shale_Split_Spoon_Procedure.pdf Shale Split Spoon Procedure] || 21k
|-
|[http://epg.modot.mo.gov/documents/321_Soil_and_Rock_Properties_FHWA_2002.pdf Soil and Rock Properties FHWA 2002] || 7.6 meg
|-
|[http://epg.modot.mo.gov/documents/321_Soil_Profile_Type.pdf Soil Profile Type] || 22k || rowspan="5" colspan="2" | [[Image:321 Drillers.jpg | 500px]]
|-
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|[http://epg.modot.mo.gov/documents/321_Soil_Survey.pdf Soil Survey] || 20k
|colspan="2"|[[Image:321 Drill in Creek.JPG | 550px]]
|-
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|[http://epg.modot.mo.gov/documents/321_Subsurface_Inv_Manual_FHWA.pdf Subsurface Investigation Manual FHWA 1997] || 27 meg
|[[Image:321 Mine Map.JPG | 275px]]||[[Image:321 Driller.JPG | 275px]]
|-
|-
|[http://epg.modot.mo.gov/documents/321_Towers.pdf Towers] || 1.9 meg
|colspan="2"|[[Image:321 Slide.jpg | 550px]]
|-
|[http://epg.modot.mo.gov/documents/321_Versa_50_Blow.pdf Versa Drill 50 Blow Procedure] || 11k
|}
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The Geotechnical Section of MoDOT provides geotechnical laboratory and field testing as well as subsurface drilling. This section obtains and interprets the subsurface information needed to design highways and bridges. Soils and Geology personnel also investigate various geotechnical matters including foundation stability and settlement of embankments, slide corrections, subgrade and base stabilization, bridge and wall foundations, sinks and mine subsidence, and the use of new technology and products. The Geotechnical Section serves as a contact regarding geotechnical problems, new products, specifications, training programs and implementation of new products and procedures. This section also participates in proficiency sample programs and inspections by the AASHTO re:source.
Geotechnical functions in MoDOT are performed by personnel assigned to the Construction & Materials Division, both in the District and at Central Office in Jefferson City. Each of the Districts should have a District Geologist or Geotechnical Specialist who typically reports to the Assistant District Construction & Materials Engineer. Within Central Office, these functions are administered through the Geotechnical Section.
The Geotechnical Section has a specialized soil laboratory with technicians and equipment for performing consolidation tests, direct shear tests, and other specialized soil tests. Professional level employees with academic backgrounds in Geology and Civil or Geological Engineering concentrate on one or more specialties. The core drill section assigns equipment and personnel statewide as needed by either District or Central Office staff. The Geotechnical section completes all final foundation investigations for structures prepared by the Bridge Division as well as settlement and stability investigations as necessary. Other duties include slide investigations, work on subgrade and base stabilization, geophysical explorations, research activities and any other geotechnical problems as they arise.
The core drill section employs its own staff of field drilling personnel and drilling support equipment. Drilling equipment includes mobile power augers with pavement cores, CME 45 truck mounted rig, track mounted Acker Renegade, track mounted Acker XLS, and a track mounted GeoProbe 3135T SPT/CPT Rig.
This Geotechnical section typically provides three types of reports, a Preliminary Geotechnical Report (PGR), a Final Foundation Investigation Report (FFIR) and a Special Investigation Report.
The PGR touches on foundations by pointing out possible foundation problems. It also contains basic slope recommendations which affect bridge length, a preliminary bridge foundation boring, soil types and properties for pavement design, depths to rock and type of rock for determining cut quantities and cut slope recommendations for soil and rock.
The FFIR for structures starts with a formal request from either the Bridge Division or District following procedures in [[751.1_Preliminary_Design#751.1.2.19_Soundings_(Borings)|EPG 751.1.2.19]]. The Bridge Division or District will provide a preliminary layout and a suggested boring plan. This boring plan should follow [[321.2_Geotechnical_Guidelines#321.2.2 Technical Guidelines for Geotechnical Investigations|EPG 321.2.2]]. The suggested boring plan is only a guide which will be modified as deemed necessary in the field by the Geotechnical Section. The basic aim is to furnish the Bridge Division or District with the information needed to develop designs for foundation types practical for a particular site. The Geotechnical Section may make recommendations for specific foundation types if geologic conditions necessitate a change. Rules of thumb as to what is practical have been developed jointly by the Geotechnical Section and the Bridge Division.


Contact Information: <br/>
Contact Information:  
MoDOT Construction and Materials Division <br/>
: MoDOT Construction and Materials Division  
P. O. Box 270 <br/>
: 1617 Missouri Blvd
Jefferson City, MO 65102 <br/>
: Jefferson City, MO 65109
Phone: (573) 526-5730<br/>
: E-mail: Lydia.Brownell@modot.mo.gov
Fax: (573) 526-4345<br/>
:::&nbsp;Zachary.Troesser@modot.mo.gov
E-mail: alan.miller@modot.mo.gov <br/>

Latest revision as of 09:55, 26 October 2026

Reference Documents
● Geophysical Methods FHWA 1998
● Geotechnical Engineering Circular No. 5 - Geotechnical Site Characterization, FHWA 2016
● Subsurface Investigation Manual FHWA 1997
● Soils and Foundations Reference Manual - Volume I, FHWA 2006
● Soils and Foundations Reference Manual - Volume II, FHWA 2006

The Geotechnical Section of MoDOT provides geotechnical laboratory and field testing as well as subsurface drilling. This section obtains and interprets the subsurface information needed to design highways and bridges. Soils and Geology personnel also investigate various geotechnical matters including foundation stability and settlement of embankments, slide corrections, subgrade and base stabilization, bridge and wall foundations, sinks and mine subsidence, and the use of new technology and products. The Geotechnical Section serves as a contact regarding geotechnical problems, new products, specifications, training programs and implementation of new products and procedures. This section also participates in proficiency sample programs and inspections by the AASHTO re:source.

Geotechnical functions in MoDOT are performed by personnel assigned to the Construction & Materials Division, both in the District and at Central Office in Jefferson City. Each of the Districts should have a District Geologist or Geotechnical Specialist who typically reports to the Assistant District Construction & Materials Engineer. Within Central Office, these functions are administered through the Geotechnical Section.

The Geotechnical Section has a specialized soil laboratory with technicians and equipment for performing consolidation tests, direct shear tests, and other specialized soil tests. Professional level employees with academic backgrounds in Geology and Civil or Geological Engineering concentrate on one or more specialties. The core drill section assigns equipment and personnel statewide as needed by either District or Central Office staff. The Geotechnical section completes all final foundation investigations for structures prepared by the Bridge Division as well as settlement and stability investigations as necessary. Other duties include slide investigations, work on subgrade and base stabilization, geophysical explorations, research activities and any other geotechnical problems as they arise.

The core drill section employs its own staff of field drilling personnel and drilling support equipment. Drilling equipment includes mobile power augers with pavement cores, CME 45 truck mounted rig, track mounted Acker Renegade, track mounted Acker XLS, and a track mounted GeoProbe 3135T SPT/CPT Rig.

This Geotechnical section typically provides three types of reports, a Preliminary Geotechnical Report (PGR), a Final Foundation Investigation Report (FFIR) and a Special Investigation Report.

The PGR touches on foundations by pointing out possible foundation problems. It also contains basic slope recommendations which affect bridge length, a preliminary bridge foundation boring, soil types and properties for pavement design, depths to rock and type of rock for determining cut quantities and cut slope recommendations for soil and rock.

The FFIR for structures starts with a formal request from either the Bridge Division or District following procedures in EPG 751.1.2.19. The Bridge Division or District will provide a preliminary layout and a suggested boring plan. This boring plan should follow EPG 321.2.2. The suggested boring plan is only a guide which will be modified as deemed necessary in the field by the Geotechnical Section. The basic aim is to furnish the Bridge Division or District with the information needed to develop designs for foundation types practical for a particular site. The Geotechnical Section may make recommendations for specific foundation types if geologic conditions necessitate a change. Rules of thumb as to what is practical have been developed jointly by the Geotechnical Section and the Bridge Division.

Contact Information:

MoDOT Construction and Materials Division
1617 Missouri Blvd
Jefferson City, MO 65109
E-mail: Lydia.Brownell@modot.mo.gov
 Zachary.Troesser@modot.mo.gov

Articles in "321 Geotechnical Engineering"

The following 3 pages are in this category, out of 3 total.

3

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