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Engineering Group: Developing the 3D Project Stratigraphic Model for Crossrail 2

15 January 2020
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Event type:
Evening Meeting, Lecture, Specialist Group
Organised by:
Engineering Group
The Geological Society, Burlington House
Event status:

A ~40km2 3D geological model, known as the Project Stratigraphic Model, has been developed for Crossrail 2, a proposed £30bn railway linking Surrey and Hertfordshire via 32km-long tunnels through London. 

The British Geological Survey 1:50,000 London Basin model was adopted as the initial baseline model. Over 1,000 boreholes were incorporated, together with information from existing publications, to review and refine the baseline model, using a combination of digital tools such as ArcGIS and Leapfrog Works. 

The Project Stratigraphic Model was a key tool for identifying geological hazards, including faulting and ‘drift-filled hollows’ along the route, designing the alignment, informing early design decisions for tunnels, shafts and station boxes based on constructability, cost and programme, and informing obstruction risk assessments.

The speakers will describe the process of 3D ground modelling, the communication of geological uncertainty, the applications of the Project Stratigraphic Model on the project, and further refinements proposed for future design and construction stages.


Charlene Ting and Ben Gilson (Arup)


The Geological Society
Burlington House


5.30pm: Tea/coffee

6.00pm: Lecture

Drinks reception to follow lecture.

Cost and registration

This is a free evening talk, with no need to book.

Live streaming

You can watch the meeting live via our live streaming service at 6.00pm on the day.