IS 2131 -1981 Code Book PDF free download
This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 24 December 1981, after the draft finalized by the Soil Engineering and Rock Mechanics Sectional Committee had been approved by the Building Division Council. Standard penetration test conducted by means of the split spoon, specified in this standard, furnishes data about resistance of the soils to penetration which can be used to evaluate standard strength data, such as .N values (number of blows per 30 cm of penetration using standard split spoon) of the soil. Methods of calculation of bearing capacity of soils based on N values are covered in IS : 6403-1981*. For obtaining dependable and reproducable samples, a standard procedure is necessary and this code is intended to furnish necessary guidance to the soil explorer in this regard. This standard was first published in year 1963 and this revision has been done so as to include a standardized split spoon sampler for which a detailed specification has been formulated separately, besides including the details of the correction factors which are necessary in calculation of bearing capacity. 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 : 2-1960t. 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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