Design of Retaining Wall and Support Systems （挡土墙和支持系统的设计）.pdfVIP

Design of Retaining Wall and Support Systems for Deep Basement Construction – A Malaysian Experience Y. C. Tan C. M. Chow GP Geotechnics Sdn Bhd, Kuala Lumpur, Malaysia (.my) gnp-geo@.my Abstract: The design of retaining walls and support systems for deep basement construction requires careful analysis, design and monitoring of performance. This is especially critical for deep basement construction in urban areas where the need for space and high land prices justify the deep basement construction. Due to the close proximity of existing buildings in urban areas, careful selection of suitable retaining walls and support systems is important, taking into consideration criteria such as control of ground movement, lowering of the groundwater table, encroachment into neighbouring land, etc. The design of retaining walls and support systems requires careful evaluation of various possible failure modes, such as overall stability, basal heave failure, hydraulic failure, structural failure, etc. In addition to conventional “working state design”, the assessment of associated ground movements due to deep basement construction is also important to ensure neighbouring structures are not affected. The risk associated with deep basement construction works is high as failures of retaining wall or support systems will be catastrophic and will affect surrounding areas. As such, the design of retaining walls and support systems for deep basement construction works requires careful consideration of soil-structure interaction and this is usually accomplished using the finite element method (FEM). However, the use of the finite element method (FEM) requires proper understanding of the limitations associated with the method and also proper modelling of the structures in order to make a representative analysis. This paper presents design approaches commonly used to assess various potential failure modes,