Geotechnical Manual Updates And Drilling Inspections
Geotechnical Manual Updates andDrilling InspectionsVictoria Leffel
INDOT Geotechnical Services Division Website Geotechnical Design Manual Guidelines and Design Memos Construction Forms Requirements for ApprovalWebsite can be found at :https://www.in.gov/indot/2804.htm
Aquifer Protection Guidelines Revisions were made to the AquiferProtection Guidelines in response togrowing concerns with the settlementof boreholes INDOT follows 312 IAC 13 regardingmaterial used to backfill a borehole Any other material needs to beapproved by INDOT prior to use
Aquifer Protection Guidelines Backfilling Revisions: Boreholes depths between 0 to 15 ft (after cave-in)- backfill with salvage soil up to theupper 2.0 ft and then bentonite chips used for the upper 2.0 ft Boreholes depths greater than 15 ft (after cave-in)- the entire hole shall be backfilled witha plugging material Plugging materials must consist of one or a combination of the following: Neat cement with not more than five percent (5%) by weight of bentonite additiveBentonite slurry, which can include polymers designed to retard swellingPelletized, medium or coarse grade crushed bentoniteOther materials approved by the commission as defined in 312 IAC 13
Aquifer Protection Guidelines Revised language to include a review ofRed Flag Investigation and/orEnvironmental Document prior to drilling Red Flag Investigations give a generaloverview of the environmentalconditions Usually one of the first documents to becompleted for a project Red Flag Investigations include: InfrastructureWater ResourcesMiningHazardous Material ConcernsEcological InformationCultural Resources
Aquifer Protection Guidelines Additional guidelines were added forbackfilling in special conditions suchas voids and artesian conditions Artesian conditions- use of a heavygrouting mix Voids- use of grouting basket or plug
Backfilling with Special Instrumentation Piezometer installation and backfillinginformation has been removed from the AquiferProtection Guidelines Piezometers shall be installed and backfilled inaccordance with INDOT Specification 204.04 Inclinometer installation and backfilling has beenupdated and is still part of the Aquifer ProtectionGuidelines Inclinometer installation guidelines followAASHTO R 45-13 Inclinometer casing shall be abandoned using abentonite slurry or neat cement within 2 feet ofground surface Casing shall be terminated and capped withconcrete
Manual UpdatesGeotechnical Manual Chapter 3Subsurface Investigation and SamplingRequirements: Pavement Projects (Sections 3.5.5 and3.5.6) High Mast Lighting & Closed Circuit TVTowers (Section 3.5.7) Traffic signal Cantilever Structure(Section 3.5.8) Traffic Signs & Light Pole (3.5.10) Topsoil/Plant Growth Layer Sampling(Section 3.6.6)
Manual UpdatesGeotechnical Manual Chapter 5 LabTesting: Topsoil and Plant Growth LayerTesting(5.21) Editorial changes to charts and tables
Website Updates Newly added Drilling and s/Drilling and Sampling Requirements.pdf Newly added Lab toryRequirements.pdf Found on Geotechnical ServicesDivision Website under ApprovedContractors, Consultants, andMaterials Section
Drilling InspectionsInspections are looking at: LocationType of BoringMeasurement of CavingCondition of EquipmentSafety Equipment/Personal ProtectiveEquipmentTraffic ControlSampling ProceduresDriller’s Field LogSample CollectionBackfilling Inspections are reflected in theconsultant evaluation done by INDOT’sGeotechnical Project Engineer
Personal Protective Equipment Please make sure anyone who is onsiteduring drilling has the appropriate PersonalProtective Equipment(PPE) Proper PPE includes hard hats, reflectiveshirt, and steel toe boots Discretion shall be used for eye protection,hearing protection, and gloves INDOT Safety Manual can be found at:https://www.in.gov/indot/files/Safety andHealth Manual.pdf
Traffic Control Please ensure traffic control is inaccordance with: Work Zone TrafficControl Guidelines Please ensure flagging operations arecorrect- flaggers are alert anddirecting traffic INDOT Work Zone Traffic orkZoneTCH.pdf
Boring Logs All boring logs should contain thefollowing information to describe theproject and individual borehole location: INDOT Des NumberProject LocationBoring NumberStation, Line, and OffsetLatitude and Longitude(Decimal Degree)Surface ElevationDrilling MethodDrill Rig TypeDrilling DateWeatherDriller’s Name and Inspector/Helper Requirements listed in Project andBorehole Location (Section 4.4.1 ofGeotechnical Manual)
Pavement Core Collector Application Reminder- All pavement coresshould be documented in thepavement core collector application If you need access to the applicationyou can contact me atvleffel@indot.in.gov
during drilling has the appropriate Personal Protective Equipment(PPE) Proper PPE includes hard hats, reflective shirt, and steel toe boots Discretion shall be used for eye protection, hearing protection, and gloves INDOT Safety Manual can be found at:
Fundamentals of drilling operations; the drilling rig equipment and their functions; drilling terminologies; drilling processes; planning of drilling operations; logistics, role and responsibilities of service companies including drilling contractor; the functions of drilling fluid, casing, cementing and components of a drill string; the different
Casing drilling, otherwise known as drilling with casing (DwC) or casing while drilling (CwD) is an alternative drilling technique to the conventional drilling method. Casing drilling involves the simultaneous drilling and casing of well with a (active-standard) casing string. It is mandatory to note that casing is the same grade and weight as in
drilling tools designed to cut faster, straighter and use less energy. Geotechnical Core Drilling Geotechnical core drilling is part of the site investigation process to assess the suitability and design of structures: hydro-dams, building foundations, caissons, and other supports. This type of drilling is characterized by numerous short holes.
Geotechnical Design & Construction Mir Zaheer P.E. INDOT Geotechnical Services Division Geotechnical Report A tool used to communicate the site conditions and design and construction recommendations to the roadway design, bridge design, and construction personnel. Comprehensive Geotechnical Reports (GRs):
Geothermal Well Drilling, the differences between Geothermal Drilling and Oil and Gas Drilling. The challenges of drilling and producing hot, volcanic resources from fractured formations. By Louis E. Capuano, Jr. November 21, 2014
Drilling Productivity Report (DPR), September 2020. The drilling process is increasingly managed usingmass production operations , such as pad drilling, cube drilling, and multilateral drilling, to achieve higher cost efficiency in both the physical and contractual management of heavy-duty and fully automated drilling rigs.
Lifting Capacity of Drilling Fluids, Pressure losses in the Circulating System and ECD Functions of the Drilling Fluids, Impact of Hydraulic on the Drilling Optimization Parameters affecting on the Drilling Penetrations Drilling Fluid Properties, Functions of Drilling Fluid Mud Properties and Problems related to Mud Properties
Geotechnical Manual. 2017 Geotechnical Manual
