Advanc e d Ge ote c hnic al Me thods in E xplor ation (A- G a ME ) - PowerPoint PPT Presentation

Ce nte r fo r Ac c e le ra ting I nno va tio n Advanc e d Ge ote c hnic al Me thods in E xplor ation (A- G a ME ) T ools for E nha nc e d, E ffe c tive Site Cha r a c te r iza tion 1

Ce nte r fo r Ac c e le ra ting Inno va tio n What ar e the Advanc e d Ge ote c hnic al Me thods in E xplor ation? T he A-G a ME is a to o lb o x o f unde rutilize d sub surfa c e e xplo ra tio n to o ls tha t will a ssist with: • Asse ssing risk a nd va ria b ility in site c ha ra c te riza tio n • Optimizing sub surfa c e e xplo ra tio n pro g ra ms • Ma ximizing re turn o n inve stme nt in pro je c t de live ry 2

Ce nte r fo r Ac c e le ra ting Inno va tio n Why do you ne e d to br ing your A- Ga ME ? • Be c a use , in up to 50% o f ma jo r infra struc ture pro je c ts, sc he dule o r c o sts will b e sig nific a ntly impa c te d b y g e o te c hnic a l issue s!! • T he ma jo rity o f the se issue s will b e dire c tly o r indire c tly re la te d to the sc o pe a nd q ua lity o f sub surfa c e inve stig a tio n a nd site c ha ra c te riza tio n wo rk. 3

Ce nte r fo r Ac c e le ra ting Inno va tio n Pr e se nte r s Silas Nichols Derrick Dasenbrock Ben Rivers Principal Bridge Geomechanics/LRFD Geotechnical Engineer – Engineer Engineer Geotechnical Minnesota DOT FHWA RC FHWA HQ 4

Ce nte r fo r Ac c e le ra ting Inno va tio n What is “Every Day Counts” (EDC)? State-based model to identify and rapidly deploy proven but underutilized innovations to:  shorten the project delivery process  enhance roadway safety  reduce congestion  improve environmental sustainability  EDC Rounds: two year cycles  Initiating 5 th Round (2019-2020) - 10 innovations  To date: 4 Rounds, over 40 innovations For more information: https://www.fhwa.dot.gov/innovation/ FAST Act, Sec.1444 5

Ce nte r fo r Ac c e le ra ting Inno va tio n Imple me ntation Planning T e am Pra c titio ne rs l Ge o te c hnic a l l Co nstruc tio n l De sig n l Risk l Ge o physic s l Site Va ria b ility l Pub lic a nd Priva te Se c to rs l I ndustry Re pre se nta tio n – ADSC, AE G, DF I , E E GS, GI a nd AASHT O COBS, COC, COMP ian Collins – F HWA-WF L Mic he lle Mann – NMDOT Br oc k – MNDOT di - GDOT De r r ic k Dase nbr Mar c Mastr onar lias – F HWA-E F L Mike Mc Vay – Univ. o f F lo rida Mohamme d E iffiths – Mine s Silas Nic hols – F HWA HQ Vaughan Gr ty Duffy – ADSC y Nodine – GE I Co nsulta nts Pe ggy Hagge r Mar amy – F HWA-CF L Bill Owe n – Ca ltra ns Khamis Har hota – F L DOT ystle Pe lham – NHDOT David Hor Kr Jim Hussin – K e lle r F o unda tio ns Je ff Re id – Ha g e r-Ric hte r ge – DF I s – F HWA-RC Mar y E lle n L ar Be n Rive r e nc e – F HWA-ME Div. e nt Rose nblad – Univ. o f Misso uri Br ian L awr Br oe hr – Univ. o f Misso uri le s – Olso n E ng ine e ring E r ik L Phil Sir 6

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Ce nte r fo r Ac c e le ra ting Inno va tio n T opic s • Ove rvie w o f T he A-G a ME • Missio n • Mo tiva tio n, Be ne fits • Co ntra st Curre nt Pra c tic e a nd T he A-G a ME • F e a ture d T e c hno lo g ie s in T he A-G a ME T o o lb o x • Sta te E xpe rie nc e • MNDOT E xpe rie nc e , Applic a tio ns, Ca se -E xa mple s • I mple me nta tio n • Visio n • Disc ussio n Wha t yo u wa nt to se e o Ho w to ma ximize va lue to yo u o 8

Ce nte r fo r Ac c e le ra ting Inno va tio n Mission Mitig a te risks to pro je c t sc he dule a nd b udg e t, a nd impro ve re lia b ility b y o ptimizing g e o te c hnic a l site c ha ra c te riza tio n using pro ve n, e ffe c tive e xplo ra tio n me tho ds a nd pra c tic e s. 9

Ce nte r fo r Ac c e le ra ting Inno va tio n Risk Source: FHWA 10

Ce nte r fo r Ac c e le ra ting Inno va tio n Risk Source: Florida DOT Source: Florida DOT 11

Ce nte r fo r Ac c e le ra ting Inno va tio n Be ne fits of Br inging Your A- G a ME Re duc e d Risk. Re duc ing unc e rta intie s in sub surfa c e c o nditio ns mitig a te s de sig n a nd c o nstruc tio n risks. ove d Qua lity. I mpro ving c o nfide nc e in the g e o te c hnic a l Impr c ha ra c te riza tio n re duc e s unne c e ssa ry c o nse rva tism in de sig n a nd e sta b lishe s a mo re re lia b le b a sis fo r de sig n a nd c o nstruc tio n o f fo unda tio ns a nd o the r g e o te c hnic a l fe a ture s impa c ting the hig hwa y syste m. y. Sinc e a sig nific a nt numb e r o f Ac c e le r a te d Pr oje c t De live r c o nstruc tio n de la ys c a n b e a ttrib ute d to ina de q ua te kno wle dg e o f sub surfa c e site c o nditio ns, we ll-sc o pe d inve stig a tio n pro g ra ms impro ve de c isio n-ma king a nd c o nstruc ta b ility, pro viding time a nd c o st sa ving s fo r tra nspo rta tio n a g e nc ie s. 12

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Cur r e nt Pr ac tic e Source: FHWA 13 Source: Iowa DOT

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Cur r e nt Pr ac tic e Not To Equal Scale Source: Iowa DOT 14

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Cur r e nt Pr ac tic e Boring/CPT Locations Borings: Typ. SPT every 5 feet; 18 inch of Sampling To Scale Total Volume Tested or Sampled < 0.01% (typically) 15

Ce nte r fo r Ac c e le ra ting Inno va tio n Miller Creek Resistivity North T- T- c0 T- 3 2 4 1 Source: Minnesota DOT

Ce nte r fo r Ac c e le ra ting Inno va tio n all borings are offset 3.5 m to the Miller Creek Resistivity North west of the ERI T- line T- c0 T- 3 2 4 1 Sand & gravel w/possible riprap Silty Silty Soils Soils Sand & sands gravel or sand & possible gravel utility sandy to silty N Source: Minnesota DOT

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Br inging your A- GaME Courtesy of Jeff Reid, Hager-Richter Assoc. 18

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Br inging your A- GaME Courtesy of Jeff Reid, Hager-Richter Assoc.

Ce nte r fo r Ac c e le ra ting Inno va tio n Site Char ac te r ization – Br inging your A- GaME • 6-Mile Se c tio n • 1-da y F ie ld T e sting • ½-da y Pro c e ssing Co nfirm Soft Soils c o nditio ns Likely Co nc e ntra te a dditio na l inve stig a tio n whe re mo st va lua b le Source: Florida DOT 20

Ce nte r fo r Ac c e le ra ting Inno va tio n Be ne fit of Upfr ont Inve stme nt in Site Inve stigation Source: NCHRP Synthesis 484 - Influence of Geotechnical Investigation and Subsurface Conditions on Claims, Change Orders, and Overruns (After Figure 1) 21

Ce nte r fo r Ac c e le ra ting Inno va tio n MODOT Approa c h for Re la ting De sig n Re lia bility to Va ria bility. E xa mple Shown: T ip re sista nc e – sha fts in c la y 1.0 Bridges on Minor Roads 0.9 Bridges on Major Roads Major Bridges (<$100 million) Resistance Factor for End Bearing, ϕ qp 0.8 Major Bridges (>$100 million) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 COV of Mean Undrained Shear Strength, COV su 22 Source: Missouri DOT

Ce nte r fo r Ac c e le ra ting Inno va tio n Pr e liminar y Planning – Site Inve stigation 23 Courtesy of BGC Engineering and BC Hydro

Ce nte r fo r Ac c e le ra ting Inno va tio n F e atur e d Ge ote c hnic al E xplor ation Me thods Co ne Pe ne tra tio n T e st (CPT / SCPT ) E le c tric a l Me tho ds (E R, I P, SP) Me a sure me nt While Drilling (MWD) Se ismic Me tho ds (Re fra c tio n, Surfa c e Wa ve s, F WI , T o mo g ra phy, Re fle c tio n) Optic a l a nd Ac o ustic T e le vie we rs (OT V/ AT V) 24

Ce nte r fo r Ac c e le ra ting Inno va tio n Mainstr e am E ffe c tive Unde r utilize d Me thods Cone Pe ne tr a tion T e sting (CPT u/ SCPT u) • Mo re re lia b le pa ra me te rs tha n fro m c o nve ntio na l SPT • Sma ll stra ta c ha ng e s e a sily disc e rna b le • Po re -wa te r pre ssure me a sure me nts • She a r-wa ve me a sure me nts with SCPT u • 3-10 time s fa ste r tha n Source: FHWA c o nve ntio na l drilling 25

Ce nte r fo r Ac c e le ra ting Inno va tio n Mainstr e am E ffe c tive Unde r utilize d Me thods E le c tr ic a l Me thods (E R, IP, SP) • Disc e rn c o ntra sting ma te ria ls a nd g ro undwa te r c o nditio ns o ve r la rg e a re a s • Cla y, Silts, Sa nds/ Gra ve l, Vo ids, Gro undwa te r, g e o lo g ic fe a ture s Source: FHWA-CFL 26

Ce nte r fo r Ac c e le ra ting Inno va tio n Mainstr e am E ffe c tive Unde r utilize d Me thods Me a sur e me nt While Dr illing (MWD) • Co ntinuo us pro file • Disc e rna b le stra tig ra phic a nd ma te ria l c ha ng e s • Ro c k o r So il • Sta nda rdize d in E uro pe I SO 22476-15 27 Source: FHWA