civil engineering testing Method

GENERAL REQUIREMENTS FOR CONCRETE VIBRATORS, SCREED BOARD TYPE SCOPE This standard lays down the requirements for materials, sizes, construction, assembly and performance of screed board concrete vibrators, screed board vibrators operated by pneumatic power are not covered in this standard. TERMINOLOGY For the purpose of this standard, the following definitions shall apply. Amplitude of Vibration - Maximum displacement of a vibrating. body from its mean position during vibration. It is usually expressed as half of its total displacement. Eccentric Shaft ( Rotor ) - The rotating shaft of the vibrating unit designed to produce the required frequency and amplitude of vibration. Anchor - The arrangement provided to give a support to the screed board when desired. Frequency of Vibration - Number of complete cycles of vibrations per minute. Screed Board ( Tamping Beam or Vibrating Beam ) - The beam to which the vibrating unit ...

DESCRIPTION This work shall consist of construction of all types of piles for structures in accordance with the details shown on the drawings and conforming to the requirements of these Specifications or as directed by the Engineer. The construction of pile foundations requires a careful choice of the piling system depending on subsoil conditions and loading characteristics and type of structure. The permissible limits of total and differential settlements, unsupported length of pile under scour, impact/entanglement of floating bodies and any other special requirements of project, are also equally important criteria for selection of the piling system. The method of installing the piles, including details of the equipment shall be submitted by the Contractor and got approved from the Engineer before commencement of work. The work shall be carried out as per IS:2911 except as modified herein. SUBSURFACE INVESTIGATIONS The complete subsurface inve...