IS 4651(भाग 2) : 1989 के अनुसार, यदि स्थिर अवस्था में मृदा दाब गुणांक 'Ko' का मान 0.4 है, तब मृदा का प्रकार __________ है।

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DDA JE Civil Official Paper (Held On: 28 Mar, 2023 Shift 2)
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  1. अनावृत रेत
  2. सघन रेत
  3. कठोर मृत्तिका
  4. मृदु मृत्तिका

Answer (Detailed Solution Below)

Option 1 : अनावृत रेत
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व्याख्या:

विराम पर मृदा दाब गुणांक:

\(\rm{{{\rm{k}}_{\rm{r}}} = \frac{{ {\rm{μ }}}}{{1 - {\rm{μ }}}}}\)

जहाँ,

μ गुणांक पॉसों अनुपात है।

IS 4651 (भाग 2) 1989, तालिका 1 के अनुसार: 

मिट्टी Ko
अनावृत रेत 0.4
सघन रेत 0.5-0.6
रेत, अच्छी तरह से जमा हुआ 0.8
नरम मृत्तिका 0.6
कठोर मृत्तिका 0.5
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