Digital Data. Its use in geotechnical design & execution. Remedy Geotechnics Ltd. Dr Derek Egan Director.

Transcription

1 Digital Data Its use in geotechnical design & execution Dr Derek Egan Director Remedy Geotechnics Ltd

2 Digital Data - Use in geotechnical design & execution Introduction Aims of the presentation Down amongst the data

3 Digital Data - Use in geotechnical design & execution INTRODUCTION Are we being disruptive? A disruptive innovation is an innovation that creates a new market and value network and eventually disrupts an existing market and value network, displacing established market leaders and alliances. Is more than just: Development of existing technology is something that leads to a radical change A new innovation it needs also to disrupt existing technology Changing technology its about changing the whole business model To ponder: Is BIM disruptive? Is AGS4 disruptive? Should we be looking to be more radical?

4 Digital Data - Use in geotechnical design & execution BIM Building Information Modelling Possible due to the digital revolution But how far has it penetrated into geotechnical design? How far has it penetrated in geotechnical execution? Lets consider the geotechnical data journey How far does it currently go? How far could it go?

5 Digital Data - Use in geotechnical design & execution The geotechnical data journey Chandler & Hutchinson (1998) Child et al. (2014) But even now the model does not cover the full geotechnical process

6 Digital Data - Use in geotechnical design & execution The geotechnical data journey extended Archive for As Builts & Future Use SI Field Logging SI Lab testing & reporting Chandler & Huchinson And Childs et al. Geotechnical Design Scheduling Geotechnical Works Feedback Construction Control Construction Records

7 Digital Data Geotechnical design What digital data is useful for the foundation designer? SI data FPS survey (Egan, 2008) zero/221 had ags data files provided Experience suggests the situation no better now Possible opportunity to be disruptive? What are the barriers? Ignorance of the benefits of ags data outside of the geotechnical world Concerns over liability over a long/convoluted supply chain Software & training expense if rarely used Design Data FPS pile schedule rarely used why? Analysis & visualisation tools ags data + software interactive 3D ground models Soil parameter derivation

8 Digital Data Scheduling & execution Rig operator guided to undertake execution, such as: Location coordinates by GPS Pile or column length, lift speed, etc. displayed Rig computer screen shows tram lines to assist operator, or can use autobore/autoconcrete (CFA) or other automated execution processes Possible opportunity to be disruptive? Telemetry allows: near Real Time review in remote office useful for say undertaking trial drives in driven piling Safe remote storage of data

9 Digital Data Execution records Rig instrumentation systems collects execution data Date, time, rate of penetration, mast inclination, crowd force, concrete/binder supply, number of hammer blows and pile penetration etc. depending on foundation technique Nice graphical plots routinely provided Possible opportunity to be disruptive? Telemetry/internet allows: Third party access to As Built data (sometimes viewed with suspicion by the contractor) Could even have a trigger warning when something is not right Enables further analysis of As Built data/incorporation into BIM model, for example: Plotting contours of driven pile depths Reviewing jet grout column layouts

10 Digital Data Execution records Egan (2014)

11 Digital Data Plant instrumentation A number of branded systems available. Challenges include: Harsh working environment robust sensors and cabling required Calibration how often is this actually done?. and recorded? What happens when instrumentation fails does the rig have to stop & the dilemma this imposes Cultural shifts.. residual Luddite thinking occasionally emerges Cost & time investment Possible opportunity to be disruptive? Benefits include: Consistent and reliable data collection and storage More efficient execution (faster, more controlled, less waste, more sustainable, easier QA) Easier dissemination of data around the project team and stakeholders (including into BIM model)

12 Digital Data The feedback loop Comparing the As Built data with the design information. Example Victoria Station Upgrade Jet Grouting

13 Digital Data The feedback loop Comparing the As Built data with the design information. Example Victoria Station Upgrade Jet Grouting

14 Digital Data Design CFA piling example:i. Pile schedule passed from scheme designer to pile designer digitally (e.g. FPS Electronic Pile Schedule pile No., loads, coordinates, cut-off level etc) ii. Designer updates with output from design (length, diameter, rebar etc) Reference Pile Ref Loading Drawing Pile Pile Cap Ref Ref Type Ref Pile Geometry Cut-off Level (mod) Piling Pile Design Platform Diameter Easting Level (mm) (m) (mod) EC7 Vertical Actions Design Vertical/ Gk Northing Raking (kn) (m) Angle ( ) Qk, l (kn) Qk, wind (kn) Qk, i (kn) Qk, j (kn) Tk Ad (kn) (kn) DA1 DA1 DA1 DA1 Gk,m Qk,m Comb1 Comb1 Comb2 Comb2 Gk (knm) (knm) (ULS-STR) (ULS-STR) (ULS-GEO) (ULS-GEO) (kn) Ed, max (kn) Ed, min (kn) Ed, max (kn) Ed, min (kn) EC7 Horizontal Actions Qk, l (kn) Qk, wind (kn) DA1 DA1 Pile Toe Ad Comb1 Comb2 Level (kn) (ULS-STR) (ULS-GEO) (mod) Ed, max (kn) Ed, max (kn) Pile Design Min Steel Projection above COL (m) Top of Main Bar Main Bar Shear Bar Steel No of Diameter Length Diameter Level Main Bars (mm) (m) (mm) (mod) Shear Pitch (mm) Shear Type (Helical/Link)

15 Digital Data Scheduling CFA piling example:i. Pile schedule passed from scheme designer to pile designer digitally (e.g. FPS Electronic Pile Schedule pile No., loads, coordinates, cut-off level etc) ii. Designer updates with output from design (length, diameter, rebar etc) iii. execution data extracted and sent to rig in excel format

16 Digital Data execution control CFA piling example:i. Pile schedule passed from scheme designer to pile designer digitally (e.g. FPS Electronic Pile Schedule pile No., loads, coordinates, cut-off level etc) ii. Designer updates with output from design (length, diameter, rebar etc) iii. Construction data extracted and sent to rig in excel format iv. As rig constructs the pile the data file is updated with construction parameters to give As Built record (date, time, boring & lift speed, auger rotation, concrete supply etc) {could even have rebar tagged/bar coded and scanned into data file}

17 Digital Data execution records CFA piling example:i. Pile schedule passed from scheme designer to pile designer digitally (e.g. FPS Electronic Pile Schedule pile No., loads, coordinates, cut-off level etc) ii. Designer updates with output from design (length, diameter, rebar etc) iii. Construction data extracted and sent to rig in excel format iv. As rig constructs the pile the data file is updated with construction parameters to give As Built record (date, time, boring & lift speed, auger rotation, concrete supply etc) {could even have rebar tagged/bar coded and scanned into data file} i. As Built information then available for real time review and download into BIM model (can add further information e.g. As Built coordinates etc).

18 Digital Data execution records mitigate risk 10m deep shaft in water bearing sand with GWT at ground level Secant CFA piled excavation essential no gaps between piles As built record of pile location & inclination modelled in 3D to look for gaps Point cloud survey (for fun) compared to As Built 3D model

19 Digital Data - Use in geotechnical design & execution - Summary The geotechnical data journey. extended Archive for As Builts & Future Use SI Field Logging SI Lab testing & reporting Chandler & Huchinson And Childs et al. Geotechnical Design Scheduling Geotechnical Works Feedback Construction Control Construction Records

20 Digital Data - Use in geotechnical design & execution The challenge how do we break down the barriers and extend the journey, and may be become a little disruptive???

21 Digital Data - Use in geotechnical design & execution And if we are disruptive will some of us go out of business?? Or will we go out of business if we are not disruptive??

22 Thank you for listening Derek Egan Remedy Geotechnics Ltd This presentation is available on slideshare

23 Remedy Geotechnics Ltd. WHO WE ARE - Specialist geotechnical design consultancy WHAT WE OFFER 25 years experience Contracting, consulting & academia Bias to practical geotechnical design.