PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
9th Edition
ISBN: 9781337583879
Author: Das
Publisher: CENGAGE L
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Chapter 5, Problem 5.10P
To determine
Classify the soil according to the Unified soil classification system and provide group symbol and group name.
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Ex 11: Design inlet system for the road in figure below with
catchment area=86 m*239 m. C=0.8, i=100 mm/hr, Gutter data: y
max.=8cm, n=0.018, k=0.38, slope=%1, Z=25, %25 clogging,
(space=bar=2 cm). Inlet type used (consists of tow part curb and
Q grad inlet =0.6Qgutter max.
grade inlet) Q curb inlet =0.4Qgutter max.
0.8*100
3600*1000
Solution: (Qs) Total=CIA=
Qgutter (Max.)=k²√√s y8/3 = 0.38-
25
0.018
*(86*239)=0.457 m³/s
√0.01 0.088/3= 0.0627 m³/s
30 m
12 m
2mL
12 m
30 m
Residence
30 m
Streat
12 m
Bof
2 m
ㅈ
239 m
A2
A1
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