BS 9295:2020 pdf free.Guide to the structural design of buried pipes.
BS 9295 This British Standard gives the UK established method for the structural design of buried pipes under various conditions of loading. The procedures are explained, with tables listing the recommended design values for the appropriate variables in the design formulae, figures providing graphical information on vehicle surcharge loadings, and tables of rigid pipe bedding factors. NOTE The scope of BS EN 1295-1:2019 is restricted to the structural design of water supply pipelines, drains and sewers, and other water industry pipelines, whether operating at atmospheric, greater or lesser pressure. Some aspects of longitudinal effects are discussed (see Annex A), but this topic is not fully covered. The initial selection of options for the pipe material involves consideration of matters beyond structural design and is outside the scope of this standard.Terms and definitions For the purposes of this British Standard, the terms and definitions given in BS EN 1295-1:2019 and the following apply. buried pipe system composite structure comprising the pipe, its joints and the surrounding soil embedment pipe-soil system conceptual two-dimensional structural unit comprising the buried pipe and an annulus of the surrounding soil, including pipe embedment and native ground, which interact to resist applied external and internal loads and/or imposed deformations NOTE The size of soil annulus varies according to the relative sifness of the pipe and the soil.The buried pipe system is a composite structure comprising the pipe, its jointing system and the surrounding soil embedment. All pipes are longitudinal conveyors of fluids, and in the structural design of the buried pipe system it is generally necessary to take account of both the longitudinal and the cross-sectional response to both external and internal loads. In determining the extent of influence of longitudinal effects on pipe design it is important to distinguish between flexibly jointed and continuously welded systems, and between gravity and pressure systems. In both longitudinal and cross-sectional response, the soil embedment acts compositely with the pipe. The zone of structural influence of the soil surrounding the pipe depends on the relative properties of both pipe and soil and can extend beyond the trench fill and into the native ground. BS 9295 pdf download.