Sha Tin to Tai Po coastal road, new territories, Hong Kong: construction

Sha Tin to Tai Po coastal road, new territories, Hong Kong: construction

206A backfill were employed. The dewatering treatment and instrumentation used to check the effectiveness of ground treatment are described. 875276 S...

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206A backfill were employed. The dewatering treatment and instrumentation used to check the effectiveness of ground treatment are described.

875276 Sha Tin to Tai Po coastal road, New Territories, Hong Kong: design Bowley, A A; Martin, P M: Morrison, I M lnst Civ Engr Proc 1/82, Ptl, June 1987, P507-525 Comprehensive soil investigation and studies were needed for the design of a roadway embankment and the associated land reclamation. Large parts of the earthworks were in up to 5m of water over up to 8m of soft marine clays. Initial investigations used boreholes, probes and a seismic survey. A trial embankment was constructed to test the feasibility of the completion of the project without major excavation of the soft clays, and to measure their field shear strength, permeability and compressibility. Further localised field tests including vane shear tests were carried out to calculate settlements and ensure differential settlements were acceptable. The embankment was successfully constructed using rockfill which consolidated under its own weight for the submerged sections.

875277 Sha Tin to Tai Po coastal road, New Territories, Hong Kong: construction Foster, E F; Tainsh, J M; Pitassi, A lnst Civ Engr Proc V82, Ptl, June 1987, P527-549 The construction of a roadway embankment over soft marine clays and in up to 5m of water is described. Design requirements, formulated after extensive site investigations, required that over 3m cubic metres of soft marine deposits were removed by dredging, and 7m cubic metres of submersible and compactible fill deposited. Details are given of the dredging, placement and compaction of the fill. A monitoring system was installed to observe the settlement and stability of the slopes.

875278 Portworthy china clay tailings disposal scheme Street, A lnst Civ Engr Proc V82, Ptl, June 1987, P551-566 The Portworthy Phase 2 tailings embankment was started in 1975 and will be complete at height 30m in 1990. The design concepts in terms of embankment stability, resistance to seismic loading, and liquefaction potential are presented. The characteristics of the tailings and the part completed embankment, particle size distribution, permeability, relative density distribution, seepage and consolidation are described. Finally, operational costs are considered.

875279 Foundation treatment at Nerskogen dam Tviet, T; Beitnes, A; Johansen, P M Norw Geotech lnst Publ N165, 1986. 6P Nerskogen dam is an earth and rock fill embankment dam founded partly on bedrock and partly on moraine deposits. Grouting of the soils of the dam foundation was considered difficult, and an impervious blanket of compacted clay till was constructed. The foundation treatment, drainage system, and measurement of pore pressure and leakage are described.

875280 Design and construction of high embankments on .soft clay Chin Fung Kee Proc 8th Southeast Asian Geotechnical Conference, Kuala Lumpur, 11-15 ,~larch 1985 1"2. P42-60. Publ Kuahz Lumpur: Organising Committee, 1986 The main geotechnical problems in the design of high embankments on soft clay are identified. Settlement observations are presented for a test embankment 7.5m in height, constructed without treatment of the soft foundation clay. The performance of some test embankments treated with the displacement type of sand drains is reviewed. Some of the important aspects in the design and construction of embankments on soft clays and supported on piles are outlined. The performance of a test piled embankment and comparative costs of piled embankments and of bridging are presented. Auth.

Hydraulic structures 875281 Weir No 9 on the Opinaca River. Technical note (In French) Dussault, R; Claisse, M Can Geotech J V23, N4, Not' 1986. P595-598 Geomembranes and geotextiles have been used along with steel mesh gabions in the construction of the overflow weir no 9, on the Opinaca river at James Bay, Canada. Membranes were used in the upstream top portion of the weir. Geotextiles were used in slope protection and as a transition between compacted moraine and the bottom part of the gabions and the concrete elements housing the three control gates. 875282 Restoration of quay wall Coomber, D Civ Engng, London Jan~Feb 1987, P8-9, 51 A Victorian quay wall, suffering the effects of modern port handling techniques, increased loading and erosion and undermining due to the use of bow thrusters, has been restored. Facing with a new sheet pile wall was rejected on cost grounds. Following site investigation, the fabric of the wall was repaired, a toe protection mattress placed, jet grouted columns installed underneath the existing base of the wall, and a stressed anchor installed, passing through the columns and the old wall.

Slopes See also. 875063. 875227 875283 Examples of the use of nailing for the stabilisation of unstable slopes (In French) Cartier, G Bull Liaison Lab Ponts Chausses N145, Sept-Oct 1986, P5-12 Several case studies of soil nailing are presented. Situations where nailing can usefully replace traditional methods of slope stabilisation are described. The successful use of this technique requires accurate estimation of the stresses and phenomena involved. The information produced by the case studies should thus be used in conjunction with the previously published design code for nailed slopes.

~-~. 1987 Pergamon Journals Ltd. Reproduction not permitted