pf_02823 - Laserfiche WebLink

Home

602.102 GRANULAR MATERIAL USE DESIGNATIONS Granular materials provided for Foundation, Bedding or Backfill use as required by the CONTRACTOR in pipe construction, either as part of the pipe item work unit or as a separate Contract Item, shall be classified as to Use in accordance with the following: MATERIAL USE DESIGNATION ZONE DESIGNATION Granular Foundation - - - - - - - - - - - - - - Placed below the bottom of pipe grade as placement for unsuitable or unstable soils, to achieve better foundation support. Granular Bedding - - - - - - - - - - - - - - - - Place below the pipe midpoint, prior to pipe installation, to facilitate proper shaping and achieve uniform pipe support. Granular Backfill - - - - - - - - - - - - - - - - Placed below the surface base course, if any, as the second stage of backfill, to minimize trench settlement and provide support for surface improvements. In each case above, unless otherwise indicated, the lower limits of any particular zone shall be the top surface of the next lower course as constructed. The upper limits of each zone are established to define variable needs for material gradation and compaction or void content taking into consideration the sequence of construction and other conditions. The material use and zone designations described above shall only serve to fulfill the objectives and shall not be construed to restrict the use of any particular material in other zones where the gradation requirements are met. ~ 603.0 CONSTRUCTION Trench Excavation All work shall be done by open trench excavation except jacked or augured pipe designated on the plans or as directed by the ENGINEER. TOPSOIL shall be stripped from the trench and stockpiled to be used over all disturbed areas to be seeded or sodded. Stripping, stockpiling and respreading topsoil will be considered incidental to the project. TRENCH EXCAVATION shall be dug to the alignment and depth shown on the plans and only 100 feet in advance of the pipe laying. The trench shall be braced and drained so that workmen may work safely and efficiently therein. 600-2 .