IS 4880 -1971 Code Book PDF free download
This Indian Standard (Part IV) was adopted by the Indian Standards Institution on 15 March 1971, after the draft finalized by the Water Conductor Systems Sectional Committee had been approved by the Civil Engineering Division Council. Water conductor system occasionally takes the form of tunnels through high ground or mountains, in rugged terrain where the cost of surface pipe line or canal is excessive and elsewhere as convenience and economy dictates. This standard, which is being published in parts, is intended to help engineers in design of tunnels conveying water. This part lays down the criteria for structural design of concrete lining for tunnels in rock, covering recommended methods of design. However, in view of the complex nature of the subject, it is not possible to cover each and every possible situation in the standard and many times a departure from the *practices recommended in this standard may be considered necessary to meet the requirements of a project or site for which discretion of the designer would be required. This standard is one of a series of Indian Standards on tunnels. (see page 28). Other parts of this standard are as follows: Part I General design Part II Geometric design Part III Hydraulic design Part V Structural design of concrete lining in soft strata and soils Part VI Tunnel supports For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
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