Question
Download Solution PDFमृदु संतृप्त मृत्तिका में ऊर्ध्व खुदाई के दौरान मृदा 4 m की गहराई तक खोदी जाती है। यदि मृदा का इकाई भार 20000 N/m3 है तो मृदा की संसंजकता क्या होगी?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
क्रांतिक गहराई/असमर्थित ऊर्ध्व कट (Hc): यह वह गहराई है, जहाँ तक संसंजन मृदा की ऊर्ध्व खुदाई बिना किसी पार्श्व समर्थन के हो सकती है।
\({{\rm{H}}_{\rm{c}}} = \dfrac{{4 \times c}}{{γ \times \sqrt {{K_a}} }}\)
\({{\rm{k}}_{\rm{a}}} = \dfrac{{1 - {\rm{sin}}ϕ }}{{1 + {\rm{sin}}ϕ }}\)
जहाँ
ka = सक्रिय मृदा दाब का रैंकिन गुणांक
ϕ = आंतरिक घर्षण कोण
γ = मृदा का घनत्व
c = संसंजन
गणना:
मृदु मृत्तिका के लिए ϕ = 0, γ = 20 kN/m3, H = 4 m
\({{\rm{k}}_{\rm{a}}} = \dfrac{{1 - {\rm{sin}}ϕ }}{{1 + {\rm{sin}}ϕ }}\)
\({{\rm{k}}_{\rm{a}}} = \dfrac{{1 - {\rm{sin}}0 }}{{1 + {\rm{sin}}0 }}=1\)
\({{\rm{H}}_{\rm{c}}} = \dfrac{{4 \times c}}{{γ \times \sqrt {{K_a}} }}\)
\(4 = \dfrac{{4 \times c}}{{20 \times 1 }}\)
c = 20 kN/m2
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