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Surface structures Geological factors of importance in surface structures
313A agreement is seen between measured and calculated densities of granular and cohesive soils for vibrating rollers. Impact effects were significant for some vibratory compactors as well as the impact compactors. The case of soils prone to overstressing is also considered.
Avail: TRRL, Crowthorne, Berkshire RGI 1 6AU
Surface Structures 925309 Improved multi-wedge landslide analysis Donald, I B; Giam, P S K Proc Conference on Slope Stability Engineering: Developments and Applications, Isle of Wight, 15-18 April 1991 P55-61. Publ London: Thomas Telford, 1991 Two general wedge analysis programs for stability analysis of slopes, foundations, and retaining walls are presented. GWEDGEM, based on a limit equilibrium approach, fully satisfies force and moment equilibria. EMU is based on the upper bound theory of plasticity via the energy method. Optimization routines are described. Three examples of their use are presented: a slope with a thin weak layer, a natural slope, and the Tianshenquiao slide. For the first case, safety factors are compared to those from commonly used slope programs and excellent agreement is observed.
Geological factors of importance in surface structures 925310 Relationship between local soil conditions and structural damage in the 1989 Newcastle earthquake Poulos, H G Trans last Engrs Aust Civ Engng VCE33. N3. July 1991, P181-188 Geotechnical conditions at typical sites and characteristics of the 1989 Newcastle earthquake are outlined. Response at a number of sites is computed using an analysis which takes into account strain dependent soil stiffness and damping and realistic bedrock acceleration-time history. Damage extent can be related to calculated spectral accelerations, which in turn are related to depth of soil and height of the structure at the site. A damage potential plot is developed on the basis of soil depth and number of storeys of buildings.
925312 Engineering geological studies of slope stability of Fujia open pit mine Li Shizong; Da He; Jin Shiyuan; Dong Zhong Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3, P2235-2240. Publ Rotterdam: A A Balkema, 1990 The Fujia mine is a medium scale open pit with maximum design slope height 186m. It is located close to the intersection of large scale regional faults oriented NEE and NW. The rock mass is intersected by a complex network of faults, joints, and bedding planes. These discontinuities have been mapped and the influence of each set on slope stability evaluated, generally using the limit equilibrium method. Toppling-sliding failure is seen to be the prominent slide mechanism. The information gained is used in ongoing pit design. 925313 Geotechnical problems on slopes in Prague Pasek, J Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3, P2267-2270. Publ Rotterdam: A A Balkema. 1990 Prague was founded on the banks of the river Vitava. The river and its tributaries have eroded relatively deep valleys in Proterozoic and Paleozoic shales, in some cases covered by bedded Cretaceous sand-, silt-,and marlstones. Typical geologic profiles over steep and shallow slopes are illustrated. Conditions are often unfavourable for construction, especially in areas disturbed by old mass movements. Remedial and reinforcing work can make some slopes suitable for structures, others remain as public gardens. 925314 Engineering geological conditions of the main tangent route variants around Belgrade Radic, Z; Veijkovic, M Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3 , P2379-2386. Publ Rotterdam: A A Balkema, 1990 Construction of a link road to improve traffic flow in Belgrade is described. The route was selected to optimise costs, ground stability, spatial and ecological disturbance, serviceability to present and planned surroundings, maintenance requirements, and safety. Climatic, hydrologic, topographical, ground stability, and engineering geological parameters were taken into account. Goals were defined and assessment criteria and respective priorities established using the simplified Delphy method. Of particular importance was ground stability in an area where landslides and unstable ground are known.
925311 Study of a case of unsuitable structural system on heterogeneous soil Reyad, M M Proc 6th Australia-New Zealand Conference on Geomechunics, Christchurch, 3-7 February 1992 P190-192. Publ New Zealand: New Zealand Geomechanics Society, 1992
925315 Geological calamities research in Chinese railways Shi Wenhui Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P2401-2407. Publ Rotterdam: A A Balkema, 1990
Severe structural distress and cracking occurred soon after occupation of a residential development some 50km SW of Cairo. The low rise structures were founded on shallow footings. Site investigation showed 3-5m of heterogeneous clayey and sandy soils and a thin irregular layer of siltstone and claystone over bedrock. The primary cause of damage was related to flooding of green areas adjacent to the walls and leakage of wastewater into the inhomogeneous deposit of collapsible and expansive soils. Remedial measures are described.
The railway network in China is extensive, with much of the track in mountainous areas. The patterns, scales, and consequences of geology-related failures are analysed and their interrlation with tectonics and environmental features examined. Remedial and preventative measures are discussed, with emphasis on the elimination of hazardous situations by control of groundwater exploitation or drainage, as appropriate, and ensuring correct constructional procedures are adhered to. Continuing research into these failures is essential.
© 1992 Pergamon Press Ltd. Reproduction not permitted
Avail: TRRL, Crowthorne, Berkshire RGI 1 6AU
Surface Structures 925309 Improved multi-wedge landslide analysis Donald, I B; Giam, P S K Proc Conference on Slope Stability Engineering: Developments and Applications, Isle of Wight, 15-18 April 1991 P55-61. Publ London: Thomas Telford, 1991 Two general wedge analysis programs for stability analysis of slopes, foundations, and retaining walls are presented. GWEDGEM, based on a limit equilibrium approach, fully satisfies force and moment equilibria. EMU is based on the upper bound theory of plasticity via the energy method. Optimization routines are described. Three examples of their use are presented: a slope with a thin weak layer, a natural slope, and the Tianshenquiao slide. For the first case, safety factors are compared to those from commonly used slope programs and excellent agreement is observed.
Geological factors of importance in surface structures 925310 Relationship between local soil conditions and structural damage in the 1989 Newcastle earthquake Poulos, H G Trans last Engrs Aust Civ Engng VCE33. N3. July 1991, P181-188 Geotechnical conditions at typical sites and characteristics of the 1989 Newcastle earthquake are outlined. Response at a number of sites is computed using an analysis which takes into account strain dependent soil stiffness and damping and realistic bedrock acceleration-time history. Damage extent can be related to calculated spectral accelerations, which in turn are related to depth of soil and height of the structure at the site. A damage potential plot is developed on the basis of soil depth and number of storeys of buildings.
925312 Engineering geological studies of slope stability of Fujia open pit mine Li Shizong; Da He; Jin Shiyuan; Dong Zhong Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3, P2235-2240. Publ Rotterdam: A A Balkema, 1990 The Fujia mine is a medium scale open pit with maximum design slope height 186m. It is located close to the intersection of large scale regional faults oriented NEE and NW. The rock mass is intersected by a complex network of faults, joints, and bedding planes. These discontinuities have been mapped and the influence of each set on slope stability evaluated, generally using the limit equilibrium method. Toppling-sliding failure is seen to be the prominent slide mechanism. The information gained is used in ongoing pit design. 925313 Geotechnical problems on slopes in Prague Pasek, J Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3, P2267-2270. Publ Rotterdam: A A Balkema. 1990 Prague was founded on the banks of the river Vitava. The river and its tributaries have eroded relatively deep valleys in Proterozoic and Paleozoic shales, in some cases covered by bedded Cretaceous sand-, silt-,and marlstones. Typical geologic profiles over steep and shallow slopes are illustrated. Conditions are often unfavourable for construction, especially in areas disturbed by old mass movements. Remedial and reinforcing work can make some slopes suitable for structures, others remain as public gardens. 925314 Engineering geological conditions of the main tangent route variants around Belgrade Radic, Z; Veijkovic, M Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V3 , P2379-2386. Publ Rotterdam: A A Balkema, 1990 Construction of a link road to improve traffic flow in Belgrade is described. The route was selected to optimise costs, ground stability, spatial and ecological disturbance, serviceability to present and planned surroundings, maintenance requirements, and safety. Climatic, hydrologic, topographical, ground stability, and engineering geological parameters were taken into account. Goals were defined and assessment criteria and respective priorities established using the simplified Delphy method. Of particular importance was ground stability in an area where landslides and unstable ground are known.
925311 Study of a case of unsuitable structural system on heterogeneous soil Reyad, M M Proc 6th Australia-New Zealand Conference on Geomechunics, Christchurch, 3-7 February 1992 P190-192. Publ New Zealand: New Zealand Geomechanics Society, 1992
925315 Geological calamities research in Chinese railways Shi Wenhui Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P2401-2407. Publ Rotterdam: A A Balkema, 1990
Severe structural distress and cracking occurred soon after occupation of a residential development some 50km SW of Cairo. The low rise structures were founded on shallow footings. Site investigation showed 3-5m of heterogeneous clayey and sandy soils and a thin irregular layer of siltstone and claystone over bedrock. The primary cause of damage was related to flooding of green areas adjacent to the walls and leakage of wastewater into the inhomogeneous deposit of collapsible and expansive soils. Remedial measures are described.
The railway network in China is extensive, with much of the track in mountainous areas. The patterns, scales, and consequences of geology-related failures are analysed and their interrlation with tectonics and environmental features examined. Remedial and preventative measures are discussed, with emphasis on the elimination of hazardous situations by control of groundwater exploitation or drainage, as appropriate, and ensuring correct constructional procedures are adhered to. Continuing research into these failures is essential.
© 1992 Pergamon Press Ltd. Reproduction not permitted