The preliminary planning of culvert construction would be to study the drainage plans and specifications, and inspect your website to determine the resources required and plan the works.
There are a variety of matters which must be considered inside preliminary planning with the work. These are generally:-
(1) The construction safety regulations that might connect with the task, e.g. requirements for shoring trenches, etc.
(2) Location of public utility services which may be affected by the work and the agreed procedure to be adopted for the notification of utility authority. The utility authority ought to be asked to find and mark in the grass the positioning with their facility which can be affected by construction. Too great a credence mustn’t be added to the records of the utility authority. These records in many cases are inaccurate or incomplete. In which a service requires re-adjustment, early advice ought to be fond of the service authority as this work often cannot be given priority on the authority’ normal work.
(3) Subsurface conditions. Where significant amounts of excavation are involved, the site (and site investigation reports where available), should be examined to gain a standard knowledge of the subsurface condition.
(4) provision for traffic side tracks, etc.
(5) Planning and scheduling in the works in terms of the earthworks operations. No less than a number of the drainage work will likely be around the “critical path” and unless it’s commenced and completed promptly, the entire project may be delayed.
(6) The need to determined the center line and invert levels of the pipe on the ground well ahead with the start at work. Normally this setting out is performed with the supervisor after which it checked with the supervising engineer as it is often the engineer’s responsibility to ensure culverts are correctly located knowing that invert levels are such that effective drainage is achieved. ( In most cases, large complicated drainage structures and critical skew angles has to be set out by the engineer.) Should the supervisor consider that the pipe location requires changing, he or she must refer his proposal for the engineer before any tasks are undertaken. In some cases such proposals may involve design changes requiring Divisional Office approval. In such instances it takes time to obtain the necessary approvals. And this highlights the need for all drainage sites being examined very early in the task to be sure that construction delays are avoided.
These steps are following as general guide lines to preliminary planning of culvert construction and it might be changed according special job site culvert construction.