Common use of Encasement at Road and Nalla Crossings Clause in Contracts

Encasement at Road and Nalla Crossings. Complete concrete encasement shall be provided to the pipe in cases of road crossings and nalla crossings wherever directed by the Employer’s Representative. Concrete used for this shall be of the M15 type. Before placing concrete the pipes shall be supported near each joint with a padding of compressive material on a pre-cast concrete block. Concrete shall not be placed until the pipes have been joined, inspected and passed hydraulic testing. The concrete shall be placed to ensure full contact with the pipe barrel throughout its length. Nominal reinforcement steel shall be provided in the concrete at the bottom of the pipe as directed by the Employer’s Representative. The concrete encasement shall cover the pipeline on all sides by a minimum of 200 mm or as directed by the Employer’s Representative. Stringing of Pipe Along the Alignment The pipes shall be laid out properly along the proposed alignment in a manner that they do not create any significant hindrance to the public and that they are not damaged. Stringing of the pipes end to end along the working width should be done in such a manner that the least interference is caused in the land crossed. Gaps should be left at intervals to permit the passing of equipment across the working area. Pipes shall be laid out that they remain safe where placed and that no damage can occur to the pipes and the coating until incorporated in the pipeline. If necessary, pipes shall be wedged to prevent accidental movement. Precautions shall be taken to prevent excessive soil, mud etc. entering the pipe. Generally, the pipes shall be laid within two weeks from the date of their dispatch from the manufacturer/store. The joint gaskets shall be kept in wooden boxes or their original packing and stored in cool conditions and not exposed to direct sunlight. Gaskets must not be deformed. They shall be taken out only shortly before they are needed.