Future Evening Meetings

The BTS holds monthly evening meetings from September to June, generally on the third Thursday of the month. Unless otherwise stated, the meetings are at the Institution of Civil Engineers (ICE) with the lecture starting at 6pm. Additional meetings are arranged by the BTS Young Members, by regional groups and as joint meetings with other societies. Click on the calendar icon to place this meeting in your Outlook calendar and click on the download button for a copy of the flyer.

16/05/2019

BTS AGM and BTS May Meeting: The Brunel Museum's Original Thames Tunnel Drawings, What They Reveal

This meeting will look at the collection of original Thames Tunnel drawings. Described as the most significant Brunel drawings ever to enter the public domain and acquired by the Brunel Museum, Rotherhithe, they cover the period when Marc Isambard Brunel was developing and executing (with the help of his son Isambard Kingdom Brunel) the construction of his Thames Tunnel, the first in the world under a navigable waterway. They reveal how his ideas started and evolved, pulling in and then discarding other contemporary inventions; how he won the conviction of his shareholders, then won them over, time and time again; how his audacious self-confidence and patience was challenged from all directions yet was finally rewarded. His achievement gave others the confidence to tunnel in soft grounds everywhere and laid the foundations for urban Metro systems throughout the world. Pictorially and conceptually, it seems just a few short steps from the Brunel tunnelling shield to a modern tunnel boring machine.

Speaker(s)

Bryn Bird (M retired) Brunel Museum
06/06/2019

BTSYM June Meeting: Ground Movement due to Circular Shaft Construction in London Clay

Until recently, there were few well-documented case studies of circular shafts, which made it difficult to estimate reliable ground movements arising from such construction. Careful interpretation of field observations of ground surface settlement during construction of 27 circular shafts built for Crossrail, London Power Tunnels and Northern Line Extension, together with centrifuge model testing in the geotechnical centrifuge at Cambridge University, provides new insight into the ground movements arising from circular shaft construction. Dr Faustin and Professor Lord Mair present normalised charts to estimate the settlement due to circular shaft construction in London Clay with due consideration for different shaft geometries and construction methods.

Speaker(s)

The application process is described, and application forms may be downloaded, below.

20/06/2019

BTS June Meeting: Novaliches to Balara Aqueduct number four

The Novaliches to Balara Aqueduct number four (NBAQ4) project is part of Manila Water’s improvement and expansion initiatives and is one of the largest and most important infrastructure projects undertaken by them to date. The project involves the construction of a new intake facility at the La Mesa reservoir, a 7.3 kilometre tunnelled aqueduct and an outlet facility at the Balara Water Treatment Plant. The existing aqueduct system (aqueducts 1, 2, and 3) is required to continuously deliver 1600 million litres per day (MLD) of raw water to Balara Treatment Plants 1 and 2. Built in 1929, 1956 and 1968 respectively, they are nearing, if not already exceeding, the service life of 50 years for concrete structures. Through the project, the construction of a fourth aqueduct, which is designed to latest seismic standards, will enable the assessment and rehabilitation of the existing aqueducts. NBAQ4 will deliver water to approximately seven million people in Manila. The PhP 5.3 billion (USD 104 million) contract was awarded to a joint venture of CMC di Ravenna (Italy), First Balfour, Inc. (Philippines), and Chun Wo Engineering (Hong Kong) in August 2017.

Speaker(s)

Brendan Henry, Practice Leader - Tunnels and Underground Space, GHD
19/09/2019

Hammersmith SCL Connection Tunnel

Speaker(s)

Ed Batty
17/10/2019

BTS October Meeting: Drift-filled hollows 'pingoes'. Geological explanation and how the Lee Tunnel coped with one.

Speaker(s)

Tim Newman John Corcoran, Jacky Skipper
14/11/2019

BTS November Meeting: Harding Memorial Lecture

Speaker(s)

Bruno Coombe
12/12/2019

BTS December Meeting: Tideway TBM Delivery

At Greenwich Pumping Station, a large acoustic enclosure is being constructed over a diaphragm wall drop shaft in preparation for TBM delivery and lowering to construct the mega Tideway Tunnel. However existing underground tunnels must be protected from the delivery loading of the TBM. In particular a maze of deep existing brick sewers and underground sewerage chambers had to be protected from TBM transiting directly overhead. This presentation will give a detailed review of the inception, design, construction and full scale load testing of a pile assist RC raft protection system, which also doubles up as the foundation of the acoustic enclosure and gantry cranes for TBM delivery.

Speaker(s)

Yueyang Zhao, Wentworth House