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Importance of groove spacing in tunnel boring machine operations
172A
1730 GIIL, ED DUBE,BP Egfect of boundary conditions at the interface on Lining pressure. Conference.in French.TF,13R. PROC .THIRD CONGRESS, INToSOC .ROCK MECH.D~W~,197h, V2, PART B,1974, Pl136-1140. A brief review of models leading to lining design ~ presented. The result of a comparison involving mathematical models of circular cylindrical lined tunnels driven in viscoelastic ground with their axis parallel to one of the principal directions of the stress tensor is presented.
]-73]. LADANYI, B ECoLE POLYTECH. MONTREAL, CDN Use of the long-term strength concept in the determination of ground pressure on tunnel linings .Conference.6F,25R. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .D~NVER,1975, V2, PART B,1974,PllSO-1156. A closed-form solutica for the determination of the true ground pressure acting on tunnel supports in the rock mass is presented. The solution takes into account a number of signlficant characteristics of the rock mass such as its linear or nonlinear failure envelope, loss of strength after failure associated with volume dilation and its strength decrease with time. 1732 AUSTIN,WG BUR .RECLAM . D ~ , CoL0 .USA FABRY, JW BUR . R E C L A M . D ~ , COiO .USA Rock behaviour studies during drill-blast and machinebored tunnelling. Conference. 17F,2T. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH. ,DENV~,197h, V2,PART B,1974,P1242-1249.
1733 RAD, PF CI~N UNIV., SC, USA Importance of groove spacing in tufa%el boring machine operations .10F,5T,15R. J. GEOTECH.ENGNG DIV.ASCE, Vl01, GT9, SEPT., 1975, P949- 962. One of the more important and yet easily modified parameters in the performance of tunnel boring machines is the spacing between two neighbouring grooves created by the travel of the cutters. This spacing affects the interaction between the grooves and thus the advance rate and overall efficiency of the tunnel boring machine. Selecting the correct spacing for each specific Job requires a thorough understanding of the cutting characteristics of the rock material. Results of cutting experiments with a 7-in. (180.ram) rolling disk cutter in marble, limestone, granite, and quartzite are presented and examined. The values of muck weight per unit length, groove depth, cutting coefficient, and specific energy are taken as indicators of the cutter performance for each test condition. Determination of the optimum and critical groove spacing for field operations can easily be performed with values of say one of the performance indicators based on the interrelation between rock strength indices and cutter performance indicators. Auth. 173h KIDD,BC SIR W . H A ~ O W PTRS, LONDON,GB WILSON,AA KEEVE STEYN PTRS,JOHANNESBURG,ZA ELSON,WK SIR W.HALCROW PTRS,LONDON, GB Geotechmlcal aspects of the Orsmge-Fish Tunnel construction. Conference. 9F,1T, SR. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .DE~Yq]~,197h, V2, PART B,1974,P1283-1288.
Power plants 1735 ARAMBURU, JA UNIV .NAC .AUTON .M~ICO, MEX La An@ostura dam underground powerhouse. Prediction and measurememt of displacements during excavation. Conference. 12F,3T, SR. PROC .THIRD CONGRESS, INT .SOC .ROCK MECH., DENV~q,1974, V2, PART B, 197h, P1231-1241.
1736 ISTOV,VS TRETIAKOV, AK CHINCHARAULI, TG In-situ investigations in the underground power house of the Ingurl hydroelectric station - USSR. Conf erence.4F. PRoC .THIRD CONGRESS, INT.SOC.ROCK MECH.DENV~,1974, V2,PART B,1974, P1267-1271.
1737 PF I S T ~ ~q, E SCHLUCH. RH E INKRAFT. ALB_ DOG. AG. FR E IBURG, D WITTKE,W SCHLUCH. RHEINKRAFT .ALB.DOG .AG .FREIBURG, D RISSL~,P SCHLUCH .RHEINKRAFT .ALB-DOG .AG .FREIBURG,D Investigations, calculations and measurements for the underground powerhouse Wehr. Conference. In German. 16F,1T,SR. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .DENV~,1974, V2,PART B,1974,P1308-1317.
In-situ stresses in ground and stress around underground openings 1738 BABLA, G POLYTECH .TURIN,I OTIDVIANI, M UNIV .ROME,I Stresses and displacements around two adjacent clr. cular openings near to the ground surface. Conference .15F,1T,9R. PRoC.THIRD CONGRESS, INT.SOC.ROCK MECH.DENVER 1974,V2, PART B,197h, P975-980. The finite element method is used to determine the stresses and dlsplac~ents around two adjacent, circular openings, located near to a horizontal ground surface. 1739 DIMOV, IV State of stress and deformation in the rock mass between two horizontal strata developed simultaneously. Conference.In French.iF, SR. PRoC .THIRD CONGRESS, INT.SOC .ROCK MECH .DENV~ 1974,V2, PART B,197h,PI003-1o06.
174o ~qSHANOV, SS AKAD .WISS .KASACHISCHEN, SU SAG INOV,AS POLYTECH. HJOCHSCH.KARAGANDA, SU WECHSL~, JA POLYTECH. HoCHSCH. KARAGANDA, SU Stab llity of underground mine working in the conditions of rock creep and destruction. Conference. In german .hF. PROC .THIRD CONGRESS, INT .SOC .ROCK MECH .D~NV~ 197&,V2, PART B,1974,PlO12-1014. An integro-differential equation for stress-function, integrated by steps in time is used to calculate the stability of a mine working. A criterion obtained experimentally is used to evaluate the rock destruction. An algorithm for calculating mine working contour displacements is presented.
1730 GIIL, ED DUBE,BP Egfect of boundary conditions at the interface on Lining pressure. Conference.in French.TF,13R. PROC .THIRD CONGRESS, INToSOC .ROCK MECH.D~W~,197h, V2, PART B,1974, Pl136-1140. A brief review of models leading to lining design ~ presented. The result of a comparison involving mathematical models of circular cylindrical lined tunnels driven in viscoelastic ground with their axis parallel to one of the principal directions of the stress tensor is presented.
]-73]. LADANYI, B ECoLE POLYTECH. MONTREAL, CDN Use of the long-term strength concept in the determination of ground pressure on tunnel linings .Conference.6F,25R. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .D~NVER,1975, V2, PART B,1974,PllSO-1156. A closed-form solutica for the determination of the true ground pressure acting on tunnel supports in the rock mass is presented. The solution takes into account a number of signlficant characteristics of the rock mass such as its linear or nonlinear failure envelope, loss of strength after failure associated with volume dilation and its strength decrease with time. 1732 AUSTIN,WG BUR .RECLAM . D ~ , CoL0 .USA FABRY, JW BUR . R E C L A M . D ~ , COiO .USA Rock behaviour studies during drill-blast and machinebored tunnelling. Conference. 17F,2T. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH. ,DENV~,197h, V2,PART B,1974,P1242-1249.
1733 RAD, PF CI~N UNIV., SC, USA Importance of groove spacing in tufa%el boring machine operations .10F,5T,15R. J. GEOTECH.ENGNG DIV.ASCE, Vl01, GT9, SEPT., 1975, P949- 962. One of the more important and yet easily modified parameters in the performance of tunnel boring machines is the spacing between two neighbouring grooves created by the travel of the cutters. This spacing affects the interaction between the grooves and thus the advance rate and overall efficiency of the tunnel boring machine. Selecting the correct spacing for each specific Job requires a thorough understanding of the cutting characteristics of the rock material. Results of cutting experiments with a 7-in. (180.ram) rolling disk cutter in marble, limestone, granite, and quartzite are presented and examined. The values of muck weight per unit length, groove depth, cutting coefficient, and specific energy are taken as indicators of the cutter performance for each test condition. Determination of the optimum and critical groove spacing for field operations can easily be performed with values of say one of the performance indicators based on the interrelation between rock strength indices and cutter performance indicators. Auth. 173h KIDD,BC SIR W . H A ~ O W PTRS, LONDON,GB WILSON,AA KEEVE STEYN PTRS,JOHANNESBURG,ZA ELSON,WK SIR W.HALCROW PTRS,LONDON, GB Geotechmlcal aspects of the Orsmge-Fish Tunnel construction. Conference. 9F,1T, SR. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .DE~Yq]~,197h, V2, PART B,1974,P1283-1288.
Power plants 1735 ARAMBURU, JA UNIV .NAC .AUTON .M~ICO, MEX La An@ostura dam underground powerhouse. Prediction and measurememt of displacements during excavation. Conference. 12F,3T, SR. PROC .THIRD CONGRESS, INT .SOC .ROCK MECH., DENV~q,1974, V2, PART B, 197h, P1231-1241.
1736 ISTOV,VS TRETIAKOV, AK CHINCHARAULI, TG In-situ investigations in the underground power house of the Ingurl hydroelectric station - USSR. Conf erence.4F. PRoC .THIRD CONGRESS, INT.SOC.ROCK MECH.DENV~,1974, V2,PART B,1974, P1267-1271.
1737 PF I S T ~ ~q, E SCHLUCH. RH E INKRAFT. ALB_ DOG. AG. FR E IBURG, D WITTKE,W SCHLUCH. RHEINKRAFT .ALB.DOG .AG .FREIBURG, D RISSL~,P SCHLUCH .RHEINKRAFT .ALB-DOG .AG .FREIBURG,D Investigations, calculations and measurements for the underground powerhouse Wehr. Conference. In German. 16F,1T,SR. PROC .THIRD CONGRESS, INT.SOC .ROCK MECH .DENV~,1974, V2,PART B,1974,P1308-1317.
In-situ stresses in ground and stress around underground openings 1738 BABLA, G POLYTECH .TURIN,I OTIDVIANI, M UNIV .ROME,I Stresses and displacements around two adjacent clr. cular openings near to the ground surface. Conference .15F,1T,9R. PRoC.THIRD CONGRESS, INT.SOC.ROCK MECH.DENVER 1974,V2, PART B,197h, P975-980. The finite element method is used to determine the stresses and dlsplac~ents around two adjacent, circular openings, located near to a horizontal ground surface. 1739 DIMOV, IV State of stress and deformation in the rock mass between two horizontal strata developed simultaneously. Conference.In French.iF, SR. PRoC .THIRD CONGRESS, INT.SOC .ROCK MECH .DENV~ 1974,V2, PART B,197h,PI003-1o06.
174o ~qSHANOV, SS AKAD .WISS .KASACHISCHEN, SU SAG INOV,AS POLYTECH. HJOCHSCH.KARAGANDA, SU WECHSL~, JA POLYTECH. HoCHSCH. KARAGANDA, SU Stab llity of underground mine working in the conditions of rock creep and destruction. Conference. In german .hF. PROC .THIRD CONGRESS, INT .SOC .ROCK MECH .D~NV~ 197&,V2, PART B,1974,PlO12-1014. An integro-differential equation for stress-function, integrated by steps in time is used to calculate the stability of a mine working. A criterion obtained experimentally is used to evaluate the rock destruction. An algorithm for calculating mine working contour displacements is presented.