|
'�Cr; DOWNSLOPE DIKE W1DTH
<br /> 1. If landslope is 3°Io or more, subtract rock layer width from
<br /> adsorpHon width to obtain minimum downslope dike toe for
<br /> absorption:
<br /> � �
<br /> �'Z ft- 1 O ft =___�_'�feet �
<br /> 2. Calculate minimum mour►d s�ze based on geometery:
<br /> a. Determine depth of clean sand fill at upslope edge of rock
<br /> layer: Sep+aration i,.,_feet
<br /> b. Muldply rock layer width by landslope to determine drop ,��„_, ,,,
<br /> in elevation;Slope Difference ` ��+�...
<br /> ��x_�qo+ 100 =_�feet ��+-i-
<br /> c. Add depth of clean sand depth of clean sand for �� ��«.�:..�.
<br /> separation at upslope edge (2a) to depth of rock layer to :�� ��`
<br /> rock depth and the depth of cover to find the total mound ��"'`�
<br /> height at upslope edge of rock layer;
<br /> I.�ft + 1 ft + 1 ft = z_..►S feet
<br /> d. Enter table on page bottom with landslope and upslope
<br /> dike ratio. Select dike multiplier of :� .3� . F�,��� �xQ��.�,o.,�__�g�.
<br /> e. Multiply dike multiplier by upslope mound height . �,�a,�ne� 3.s x 303 = i ! `
<br /> to get upslope dike width: ��x�3� = t� feet ,
<br /> f. Add the depth of slope difference(2b) to the upslope -�°'�`�'-� s'-�P� y .3 xs:��_ aS
<br /> height to get the downslope height ,
<br /> 3.S +_�=4.o feet
<br /> g. Enter table on page bottom with landslope and
<br /> ;- _.
<br /> downslope dike ratio.
<br /> Select dike multiplier of S• v . �
<br /> h. Multiply dike multiplier by downslope mound height
<br /> to get downslope dike width: 4. � x s.� - a�o feet
<br /> i. Compare the values of step G.1 and Step G.2.h. Select the . �
<br /> greater of the two values as the downslope dike width; .
<br /> a o feet � :.ti:��....,..;...:�:�:. .•;:.ti::s�; s . ; . ...
<br /> ti1.:,�: :;,:,;: ;,� j:;:;::••:�:.:.
<br /> • `•.;•S . ti.. �. • 5•:{•.{•.::;::� i.�:.,l:.ti�::•:;�:��
<br /> j. Total mound width is the sum of upslope dike �e�a w��;'��...'"ti��f����w�Sw-� ;:ti:::
<br /> ... ,�,,;,,;,,;,,;,,;;��fi::t:;i:;;:;t:!{:;t:{wt:f?e!:.r;a{:'d`'!:
<br /> width plus rock layer width plus downslope :�=:•��j� r•s�•�;�•
<br /> dike width; ::: a :��
<br /> ft + ft ��r::::::::��:�•• :r.::.::.:..:::::::::::.:�::::���
<br /> �_ft +�� � � _ ��.feet u�iaa�oii�v��a�;_.1�''":�:;:::;:::;::;�:;;.::uwi�ou�wbwJ.3..
<br /> k. Total mound length is the sum of upslope `�• ``" '•`•:•�::� �:���:°'•'`:�';:
<br /> ::r �:s; '���:'tsi�'i;r;aii;"�.a;L
<br /> dike width plus rock layer length plus �'.��' : � :• •• �� '`'''
<br /> 'L:.�l��t:�:�l�st�2�l:�t.%. �f.til�t�
<br /> ;�:• �'���.{•.�.{.,{.,t�.,;�,��,ti.,t:;;.,S.,{.,
<br /> �'S�'•ti•' •t�� :.t: :tilj�'�:;�ti�it�:;�;:�� ��tit S l
<br /> upslope dike width; •.S:.j:::::::: :;;.;'•:;;�;'::::;r��'`
<br /> 1 a. ft +�ft +_�_ft= 9 a feet �_�_Ta.I Ln+gU,��
<br /> a � -,- � -,- a. � io � �o
<br /> kt 1:1 5�.~Ima� k1 7:1 31 {:1 S:1 � 6:1 7:1 �:1
<br /> 1i�bpe
<br /> 0 3A 1.0 S.0 [O 7.0 3.0 �.0 S.0 6.0• 7.0 !A
<br /> 1 �A1 �.17 5.76 6:� 7S3 2.91 3.65 �.76 5.66 6.51 7./1
<br /> 2 �.11 �.35 S.S6 6.Q l.1� 2.p 3.70 1.51 5.]6 111 6.90
<br /> � 330 4.5� S.N 7.72 /.!6 175 3.57 1.35 S.Os 5.79 i.lS
<br /> � �A1 �.76 i.75 7.l9 9.7t 2.6s 3.1� I.V �.M 5.16 6.06
<br /> S 3S7 �,S.OD� .__ .6.67 . . d57 ._ 1Q77_ 3.61 (J.7J_..% �.00 �.62 5.19 5.71
<br /> + a .-----3.6d ._.. 5.�6 7.1{ 9.J! 1t07 2S1 !.?3 3.55 • IA1 1.9� S.�l
<br /> 7 �.AO S.Si �.69 fOJ1 1J.7I 2.41 3,12 �.70 �.�3 1.70 b.l�
<br /> ! 7.95 S.ed �,71 I1S1 IS.91 2.12 3.03 3S7 1.� 1.�9 1.!!
<br /> 1 �.11 67S 9.09 13.0/ 10.92 l.36 2.9� 3.15 3.90 1.30 �.b6 "t
<br /> 10 129 6.67 t0A 15.00 7333 I.31 2.l6 3.JJ �.75 1.12 I.N '
<br /> Il �,/t 7.14 11.11 1�.65 30.1� I.26 2.� 3.2i 3.61 I.9S �.26
<br /> 12 4d9 7.69 lISO 21A3 �3.75 2.i1 2.70 9.12 iN �.p I.OS
<br />
|