TUCSS Monthly Seminar 242

Event details

TUCSS Monthly Seminar No. 242 – Thursday, 20 April 2023, 6.30 pm

Infrastructure Instability and Ground Subsidence Monitoring with Satellite InSAR

by Kyi Yu, Betime Engineer Pte Ltd and Alastair Belson, Global Remote Sensing

Abstract

In line with ever advancing technologies in Satellite and Imaging Radar, Interferometric Synthetic Aperture Radar (InSAR) becomes reality in Geotechnical Monitoring with millimetre accuracy and precision. InSAR provides different approach and alternative perspective to supplement traditional in-situ monitoring applications by having ability to monitor large area and pre-construction settlement history of ground as well as structures.

Satellite radar imagery has been acquiring over Singapore for many years. By processing such imagery with an advanced InSAR processing chain such as SqueeSAR®, it is possible to monitor current and past ground displacements to millimetre accuracy. In a typical SqueeSAR® analysis, millions of measurement points can be typically detected, each of which has an accompanying time-series of recent ground movement behaviour, indicating areas of stability, instability and movement.

Such images, updated on a regular basis, provide a wide-area and detailed understanding of ground instability and the impact of surface or underground works. InSAR offers an accurate, cost-effective and repeatable monitoring solution for ground instability monitoring. Furthermore, the technique is complimentary with in-situ observations and is completely remote, meaning no need for ground instrumentation or equipment maintenance. InSAR’s principal applications for civil engineering works and ground instability monitoring are:

·                          Assessment of pre-construction settlement baselines

·                          Determine wide-area geotechnical zones of influence (out-of-limits assessment)

·                          Optimise / verify / reduce in-situ instrumentation

·                          Separate the influence of neighbouring groundworks projects / dewatering activities

·                          Support for dispute resolution and damage liability

Speaker

Kyi Yu is the Managing Director of Betime Engineering Pte Ltd and professional in Singapore geotechnical field for almost 30 years. He has been involved in geotechnical Instrumentation and soil investigation works and managed over hundred million worth of projects, most of which are major infrastructure projects in Singapore since 1994.

Alastair Belson is the director of Global Remote Sensing (SE Asia) and International Business Manager of TRE Altamira (Italy). He is a remote sensing specialist and expert ranging from geophysical & satellite data analysis to innovative project design & reporting, business development and company directorship with 17 years of professional experience.

Time and Place

The presentation will take place electronically on Thursday, 20 April 2023 at 18:30 hrs. The presentation will take approximately 45 minutes, follow by 15 minutes of questions/discussion.

Invitation

This is the 242^nd 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

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, 10 April 2023 or when total registered participants reaches 500 whichever comes earlier.

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

Kyi Yu

Betime Engineering Pte Ltd

Alastair Belson

Global Remote Sensing