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Sub-surface work for Belfast sewerage job
U N D E R G R O U N D EXCAVATIONS:TUNNELS conditions of preserving the entire safety concept. A systematised analysis of all methods and structural models for circular linings, precast or cast in place is undertaken. A hierarchy of the main factors which influence the behaviour of the lining is established and the most important factors are analysed in detail. The type of joint between the precast segments, the configuration of the segments in cross-section and the way of achieving the injection at the extrados of the lining are the essential factors which are analyzed in interconnection to determine an optimal solution. (Author) 95324O Steel fibre reinforced concrete (SFRC) for tunnel linings, a technical approach D. Moyson, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 673-679. Tunnel linings are loaded under the combined action of normal forces and bending moments. In this paper it is shown that the bearing capacity of plain concrete can substantially be enhanced by the addition of steel fibres. The steel fibres provide the concrete an improved bending behaviour resulting in a better beating capacity, especially for large eccentricities. This improved behaviour together with the practical advantages of the use of steel fibre reinforced concrete (SFRC) makes this composite material particularly interesting for tunnel linings. (Authors) 953241 A nnn-destructive assessment of tunnel fining stability M. Hisatake, J. Murakami & T. Told, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 493-500. A non-destructive assessment of a model tunnel and an actual road tunnel under construction has been conducted using a hack analysis method. The applicability of the method has been confirmed through comparison of analytical and measured results. (Authors) 953242 Airlmrt tunnelling at Nevada's casino capital P. Darling, Tunnels & Tunnelling, 26(10), 1994, pp 17-20. At Las Vegas Airport, tunnelling operations were conducted under two major, active runways. This new road tunnel forms part of upgrading works to accept international flights. The logistical problems of the operation, site investigations, the cut-and-cover excavation method, mucking and hauling, support structures (there is an absolute zero settlement tolerance once tunnel has been completed), drainage and portals are described. (J.M.McLaughlin) 953243 Immersed tube for River Medway crossing D. Court, Tunnels & Tunnelling, 26(10), 1994, pp 31-32. Describes design and construction of the immersed tube road tunnel crossing the River Medway, UK. This method is still novel in the UK. The contract is of the design and built type. It incorporates a 500m approach embankment, a 100m piled slab, 260m long immersed tube, and a 95m cut-and-cover section on the hank. (J.M.McLaughlin)
953244 Sob-surface work for Belfast sewerage job P. Darling, Tunnels & Tunnelling, 26(10), 1994, pp 26-28. Tunnelling works involved in constructing a new sewer in Belfast are described. This is one of the few tunnelling projects undertaken in Northern Ireland in recent years. Three tunnelling methods are being used. The first is traditional cut-and-cover. The second method, a variation of the cut-and-cover, required a concrete raft support system.
137A
The third method, using a shield, was undertaken to make up lost time. Dewatering operations are also described. (J.M.McLaughlin)
953245 Cost Klippeu measures ANON, International Construction, 33(10), 1994, p28. Tunnel operations using a full-face tunnel boring machine on the Klippen hydropower tunnel project in northern Sweden is reported. A 6.5m Robbins Jarva Mk27 is being used in the hard rock. Cutter wear is erratic. Water-cooled cutters are being used. Improvements have been made to the bearing system. (J.M.McLaughlin) 953246 Urban double deck circular section tunnels for private vehicles M. Marec, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 25-30. Shield driven tunnels with a circular section can accept two superposed road levels, each with one traffic direction. The accesses to the surface uses branches of a very flexible lay-out, which allows to collection and distribution of traffic to the various streets in the open. This system allows making an underground infrastructure of motorway character at a relatively acceptable cost. All aspects - geometrical design, ventilation, safety, access of rescue staffs, civil engineering arrangements - have been elaborated and accepted by the French Authorities. Two projects are being started in the Paris area: one of 10 km underground, the other of 14 kin. (from Author) 953247 Italy - Europe finks across the Alps M. Palliccia, G. Viola & S. Pelizza, in: Tunnelling undground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 255-266. The Alps provide a natural barrier and in later ages, as well as at present, they hinder transportation, i.e.tbe connection between Italy and the rest of Europe. For this reason, the need for Alpine crossing through road and rail infrastructures is a concern of much importance in Italy and in the Alpine countries. The major problem is to provide adequate conditions for ever more rapid crossings. Consequently, very long road and railways tunnels have been or will be built. The paper will give a general overview of them through the Alps which have been constructed so far and which are planned in the future in Italy. (Authors)
953248 Underground road crossing of an archaeological area S. Pelizza, G. Corona, G. Graffi & P. Zola, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 413-417. During the construction of the A32 Turin-Bardonecchia motorway, which projected in order to speed up the road link between Italy and France via the Frejus tunnel, an area of great archaeological interest was discovered near the town of Rivoli. In order to respect the characteristics of that area the project for the construction of an artificial tunnel was modified and a natural tunnel was built instead. (Authors)
953249 Analysis and interpretation of the geoteebnical measuretaunts for tunnels in south Turkey E. Soliman & A. A. Darrag, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 281-290.
953244 Sob-surface work for Belfast sewerage job P. Darling, Tunnels & Tunnelling, 26(10), 1994, pp 26-28. Tunnelling works involved in constructing a new sewer in Belfast are described. This is one of the few tunnelling projects undertaken in Northern Ireland in recent years. Three tunnelling methods are being used. The first is traditional cut-and-cover. The second method, a variation of the cut-and-cover, required a concrete raft support system.
137A
The third method, using a shield, was undertaken to make up lost time. Dewatering operations are also described. (J.M.McLaughlin)
953245 Cost Klippeu measures ANON, International Construction, 33(10), 1994, p28. Tunnel operations using a full-face tunnel boring machine on the Klippen hydropower tunnel project in northern Sweden is reported. A 6.5m Robbins Jarva Mk27 is being used in the hard rock. Cutter wear is erratic. Water-cooled cutters are being used. Improvements have been made to the bearing system. (J.M.McLaughlin) 953246 Urban double deck circular section tunnels for private vehicles M. Marec, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 25-30. Shield driven tunnels with a circular section can accept two superposed road levels, each with one traffic direction. The accesses to the surface uses branches of a very flexible lay-out, which allows to collection and distribution of traffic to the various streets in the open. This system allows making an underground infrastructure of motorway character at a relatively acceptable cost. All aspects - geometrical design, ventilation, safety, access of rescue staffs, civil engineering arrangements - have been elaborated and accepted by the French Authorities. Two projects are being started in the Paris area: one of 10 km underground, the other of 14 kin. (from Author) 953247 Italy - Europe finks across the Alps M. Palliccia, G. Viola & S. Pelizza, in: Tunnelling undground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 255-266. The Alps provide a natural barrier and in later ages, as well as at present, they hinder transportation, i.e.tbe connection between Italy and the rest of Europe. For this reason, the need for Alpine crossing through road and rail infrastructures is a concern of much importance in Italy and in the Alpine countries. The major problem is to provide adequate conditions for ever more rapid crossings. Consequently, very long road and railways tunnels have been or will be built. The paper will give a general overview of them through the Alps which have been constructed so far and which are planned in the future in Italy. (Authors)
953248 Underground road crossing of an archaeological area S. Pelizza, G. Corona, G. Graffi & P. Zola, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 413-417. During the construction of the A32 Turin-Bardonecchia motorway, which projected in order to speed up the road link between Italy and France via the Frejus tunnel, an area of great archaeological interest was discovered near the town of Rivoli. In order to respect the characteristics of that area the project for the construction of an artificial tunnel was modified and a natural tunnel was built instead. (Authors)
953249 Analysis and interpretation of the geoteebnical measuretaunts for tunnels in south Turkey E. Soliman & A. A. Darrag, in: Tunnelling and ground conditions. Proc. congress, Cairo, 1994, ed M.E.A. Salam, (Balkema), 1994, pp 281-290.