Norway drives for low cost road tunnels

62A

842185 Strata behavior investigations of underground auger mining with aerostatic supports Smgh. M M, Ma. M S Proc 24th US Symposmm on Rock Mechanics, College Stanon, Texas, 20-23 June 1983 P691-702 Publ AEG, 1983 A new method of mmmg which entails dnlhng auger holes for coal extracuon and using pressurized flexible bladders for strata support has been developed A laboratory study of the method using a sealed model has been carraed out Three tests s~mulatmg d~fferent prototype conditions were conducted The vertical stress dlstnbutmns along the length of the model were studied and the effects of number of holes, number of supports, aerostat~c pressure, varying strata depths and overburden depths were explored The maximum abutment loads that might be expected and the mteractmn of aerostat~c supports with abutment loads were investigated

842186 Room convergence monitoring with an EDM in the Avery Island Salt Mine Thorns, R L, Gehle, R M Proc 24th US Symposium on Rock Meclumics, College Station, Texas, 20-23 June 1983 P849-856 Publ AEG, 1983 A method xs presented for momtormg room closure m underground mines with large room heights A commercmlly available electromc distance measunng (EDM) instrument was fitted with an adaptor and used to obtain room closure data m the 900ft (274m) working level of the Avery Island salt rome over a peraod of 530 days

Tunnels

See also 842102, 842311 842187 Design and construction of the Furka Base Tunnel Amberg, R Rock Mech Rock Engng VI6, N4, Nov 1983, P215-231 A case study of the 15 4kin Furka railway tunnel, Switzerland The mare support techmques used were shotcrete hnmg and a newly developed rock anchor In areas of high rock pressure it was necessary to excavate an elhptlcal or circular profile using steel ribs m addmon to anchors and shotcrete A new polyurethane grout was also used to improve rock strength and render ~t ~mpermeable

842188 Grand Canal sewer tunnel completes missing link in Dublin's drainage plan Smith, W Tann Tannlg V15, N i l , Not' 1983. P32-34 A Lovat fullface TBM was used for the first time m Ireland m the 2km long shield drive reqmred to construct the Grand Canal Sewer Tunnel and a 1 5km long spur tunnel Poor ground condltlOnS, hmestone and waterlogged sdts, sands and gravels and a t~dal raver crossing caused considerable water inflow problems

842189 Shield in drive to renovate 180 year old canal tunnel Martin, D Tuna Tunnlg VI5, N i l , Not 1983. P35-38 A major rehablhtatmn programme is m progress m the 2 8km Bhsworth canal tunnel, Northamptonshlre, UK, originally opened m 1805. The tunnel, of 3-brick rang constructmn, was draven through Upper Lms clay and Northampton sandstone Groundwater and earth movement have exerted sufficient pressure m the mxddle sectmn to completely d~stort the profile and

cause floor heave In the m~ddle third of the tunnel. 900m of exastmg brick hnmg is being removed by shield drive and replaced w~th a pre-cast concrete segmental ring hnmg The remaining two thirds will be renovated by patch repalr~

842190 Sewer rehabilitation in Hamburg Part 2: small diameter tunnelling techniques Thompson, J C Tann Tunnlg V15. Nll. Not 1983. P40-42 A Japanese pipe jacking machine has been modified for use m small dmmeter sewer tunnels being constructed m Hamburg, Germany

842191 New Austrian Tunneling Method - a rock mechanics philosophy Whitney, H T, Butler, G L Proc 24tk US Symposium on Rock Mechanics, College Station, Texas, 20-23 June 1983 P219-226 Publ AEG, 1983 Examines the development and principles of the New Austraan Tunnelhng Method It is concluded that the method can markedly Improve tunnel design and construcuon l/a the US where it has been slow to gain acceptance

842192 Allowable fimit of convergence in tunnelling Tammoto, C, Myers-Bohlke, B, lwasakl, Y Proc 24tk US Symposium on Rock Mechanics, College Station, Texas, 20-23 June 1983 P251-263 Pub/ AEG. 1983 Using experience and data from recent tunnel constructmn m Japan and the Umted States the authors propose a method to find the appropnate range of maximum allowable convergence of rock based on tunnel convergence measurements Two types of geologic condmons are discussed (1) expanswe mudstone of Japan, and (2) schistose-gneiss, containing many shear zones m Washington, DC The behavlour of these rock types m response to tunnelling ~s discussed m terms of the stress-strata behawour, actual deformatmns, maximum allowable convergence (MAC). pracUcal design and momtormg The emphasis is placed on the ~mportance of the stress-strata behawour for the determmatmn of the M A C for weak rocks Auth

842193 Submarine tunnel Rafnes-Heroya, Southern Norway Lien, R, Garshol, K, Loken, T In: Norwegian Hard Rock TtomeUiug. Norwegian Soil and Rock Engiueeriug Association Publication NI. P77-80 Publ Trondhetm Taptr Pubhshers, 1982 Prehmmary investigations for the Rafnes-Heroya Tunnel included geological mapping and seismic surveys The mare problem during constructmn was the water composmon salt water

842194 Norway drives for low cost road tunnels Martin, D In: Norwegian Hard Rock Tunnelling. Norwegmn Soil and Rock Engi~eriug Association Publication N1, P95-99 Publ Trondhetm Tapir Pubhshers, 1982 See Rem 821080 for abstract