Abstract As part of the Three Valleys Water Scheme a 6 km long 2.54 m internal diameter tunnel was driven from Iver Treatment Works (Bucks) to Wraysbury Reservoir. The general geology of the area consisted of 2–3 m of river terrace gravels overlying London Clay and Woolwich and Reading Beds. During investigations carried out in advance of the tunnel face anomalous ground conditions were detected. A deep gravel filled scour hollow was located which cut down 30 m into the London Clay onto the proposed tunnel line. In addition the underlying clay and water bearing sands (under artesian pressure) of the Woolwich and Reading Beds had been folded upwards. Extensive ground treatment was carried out consisting of an initial programme of claquage and gel grouting followed by ground freezing. Measurements of tunnel and lining movements were carried out initially in the wedge block line section and through the frozen section. Measurements indicated that ground treatment had been successful with negligible ground movement towards the tunnel face and with little lining deformation.
As part of the three valleys water scheme a 6 km long 2.54 M internal diameter tunnel was driven from iver treatment works (bucks) to wraysbury reservoir. The general geology of the area consisted of 2-3 m of river terrace gravels overlying London clay and woolwich and reading beds. During investigations carried out in advance of the tunnel face anomalous ground conditions were detected. A deep gravel filled scour hollow was located which cut down 30 m into the London clay onto the proposed tunnel line. In addition the underlying clay and water bearing sands (under artesian pressure) of the woolwich and reading beds had been folded upwards. Extensive ground treatment was carried out consisting of an initial programme of claquage and gel grouting followed by ground freezing. Measurements of tunnel and lining movements were carried out initially in the wedge block line section and through the frozen section. Measurements indicated that ground treatment had been successful with negligible ground movement towards the tunnel face and with little lining deformation.(a) for the covering abstract of the conference see IRRD 823385.
First Published in 1971.This book is mainly about Nottinghamshire, but not exclusively so as there is a great deal of similarity between the four wages districts (Nottinghamshire, Derbyshire, Leicestershire and South Derbyshire) which make up the East Midlands. For a detailed consideration of the history of mining Trade unionism in the locality, reference should be made to a previous book 'The Miners of Nottinghamshire 1914 to 1944'. The present volume contains an abbreviated account only.
Introduction The Loon A Twana Legend The Gossiping Clams A Suquamish Legend The Blackberry A Snohomish Legend The Octopus A Lummi Legend Why Rivers have Bends A Chinook Legend Days and Nights A Kittitas Legend Why the Crane has Long Legs A Puyallup Legend The Sun and the moon A Snoqualime legend Why the Robin has a Red Breast A Suquamish Legend The Coyote A Kittitas Legend The Fish, Duck and the Sea Gull A Skagit lagend The North Wind A Snoqualmie Legend How the Indians Obtained Fire A Snoqualime Legend.
'%3e%3cpath fill='%23012169' d='M0 0v30h60V0z'/%3e%3cpath stroke='%23fff' stroke-width='6' d='m0 0 60 30m0-30L0 30'/%3e%3cpath stroke='%23C8102E' stroke-width='4' d='m0 0 60 30m0-30L0 30' clip-path='url(%23b)'/%3e%3cpath stroke='%23fff' stroke-width='10' d='M30 0v30M0 15h60'/%3e%3cpath stroke='%23C8102E' stroke-width='6' d='M30 0v30M0 15h60'/%3e%3c/g%3e%3c/svg%3e)
