TUCSS Monthly Seminar no. 247

Event details

TUCSS Monthly Seminar No. 247 – Thursday, 16 November 2023, 6.30 pm

Underground Eyes (Ueyes): Detecting and Mitigating Deep Subsurface Anomalies in Urban Cities

by Dr. WU Wei, Nanyang Technological University

Abstract

This presentation will introduce an unsupervised machine learning technology to detect subsurface anomalies based on the physical characteristics extracted from the effective signals scattered and reflected directly from these anomalies. Potential anomalies at submeter scales can be interpreted based on a sharp variation of anomaly score relative to the background anomaly score, showing the advantage of overcoming subjective uncertainty and biases involved in the traditional geophysical methods, such as ground penetrating radar and seismic methods. This technology is particularly well-suited for detection of subsurface anomalies at depths up to 60 m, where most of the typical subsurface infrastructure is located. Combining with cross-correlation, the technology reveals the precise locations of engineering-disturbed areas and suggests efficient remedial works to save cost of blind grouting over large areas. Case studies will show fast and objective detection of limestone cavities, subsurface pipes, and tunnelling-induced voids in urban settings, promoting geologic risk forecast and decision-making effectiveness.

Abstract

Dr WU Wei is an Associate Professor at Nanyang Technological University (NTU), Singapore. He received his PhD degree at Swiss Federal Institute of Technology in Lausanne (EPFL), Switzerland. Prior to joining NTU, he was a Postdoctoral Scholar at Stanford University, USA. He serves as the Honorary Secretary of Society for Rock Mechanics & Engineering Geology (Singapore), the Associate Editor for International Journal of Rock Mechanics and Mining Sciences, and the Assistant Chair for Research in School of Civil and Environmental Engineering at NTU. His research focuses on experimental geophysics and energy geomechanics, with emphasis on underground space development, geo-energy extraction and storage, as well as induced geohazards due to climate change and energy extraction.

Time and Place

The presentation will take place electronically on Thursday, 16 November 2023 at 18:30 hrs. The presentation will take approximately 45 minutes, follow by 15 minutes of questions/discussion.

Invitation

This is the 247^th in a series of presentations by TUCSS and is open to current TUCSS Members only. Seats are on first-come-first-served basis and limited to 500 persons.

Registration

Individual Members are to sign up for the seminar via their TUCSS account on the TUCSS Website or TUCSS Mobile App. The details on how to access the seminar will be sent to the members who has successfully signed up for the seminar, at a date nearer to the seminar. The deadline for registration is on Monday, 6 November 2023 or when total registered participants reaches 500 whichever comes earlier.

*TUCSS Corporate Members limited to 5 registrations only. For TUCSS Corporate members, please email us the following information (name, TUCSS Corporate membership number, company name, email address, PE/RE/RTO number if applicable). 

Attendance Policy

For members who require certificate of attendance, please note of the attendance policy:

-        Login at the beginning of the seminar (link will be assessable at 18:15 hours)

-        Evidence of participation by video switched on throughout the seminar

-        Complete the quiz at the end of the seminar before logging out. The duration for the quiz is 15mins.

Certificate of Attendance will be uploaded to the member’s account after the compliance to the Attendance Policy is verified.

PDU/STU

Points have been applied and pending approval.

NOTE TO MEMBERS

Note 1: Members are not required to indicate their names and TUCSS registration details through Chat function. Members shall not send messages through Chat function during the presentation.

Note 2: Higher no-show was observed at the last TUCSS monthly seminar. As there are limited openings for the seminar, members are urged to register for the seminar only if they can attend the seminar.

Note 3: For any suggestions/feedback to improve the online seminar, members are to email to the secretariat.

Thank you.

Speaker

Wu Wei

Nanyang Technological University