![]() Take the angle of shearing resistance for Class 6N backfill as φ' = 35°įill over the culvert consists of 0.5m of Class 6N overlaid with 0.3m of road sub-base with a density ( γ) = 20kN/m 3 and 0.2m of carriageway construction with a density ( γ) = 24kN/m 3 ![]() ![]() Proposed foundation level is 1.5m below existing ground level.īackfill material will be Class 6N with a density ( γ) = 19kN/m 3. Maximum height of water inside the culvert is 1.8m above the invert level of the culvert. Maximum height of ground water is 1m above the invert level of the culvert. Density of the foundation material is 19kN/m 3. The ground investigation report shows the founding strata to be a well-drained cohesionless soil having an angle of shearing resistance (φ') = 32° and classified as 'not hard' material. The bridge site is located south east of Oxford (to establish the range of shade air temperatures). Analyse the culvert using a unit strip method. IndexĤ) Load Case Tables B.1 B.2 B.3 B.4 B.5 B.6ĭesign the in-situ concrete culvert shown below to carry LM1 and LM3 vehicle SV196. The example is presented to promote comment and discussion. Buried Box Design Example to BS EN 1997-1Īnd PD 6694-1:2011 The following example is not a definitive solution for the design of a box culvert, but provides one solution to demonstrate the principles involved when considering design standards PD 6694-1:2011 and BS EN 1997-1.
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