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�� <br /> BU1LD Plan <br /> Develop an accurate understanding of the job site before sio s <br /> Pe <br /> DESIGN beginning any design, engineering or conswction. atwve <br /> �_.� <br /> , Si�e GeQ�try � � <br /> Develop an accurate PIAN of existing physical feaWres. Observe the soil i�i�'� <br /> type and condition, site geomelry at the wall location and immediale �. y{ I����:. <br /> ��,,�,� � r <br /> surroundings. Note the na�ural drainage pattems. Identify all physical (eatures surrounding ;�. �� �i'�;4 1�.,-��.�';' <br /> Ihe proposetl wall location. Note key elevalions, lo� lines, utilities, strucwres, vegetation, etc. - ,'-�-���-'� <br /> SlOpes <br /> Below <br /> Y � �� 1L ��� � -�. _ <br /> �G3 �:;- :ona,,,, '^ . \•, ,r— <br /> •'�� • �'� ..�' � <br /> � ,•• <br /> t•'r. `• <br /> � t �•� Note Ihe siie geometry <br /> i6Ti�0`:�'�� N[LD - . <br /> p�,� . .�, : � 7�waNb •.. � above and below the <br /> OFFWE6UILVI�JG . .�;,:; i <br /> � � � � � proposed wall locafion. <br /> !�' ' �`>;. , . <br /> i �' <br /> ,,�r�; Q ,:- Sureharges _ <br /> � ' ' K /� � 'II � . ; �"_ <br /> � ' ti t <br /> '�� `�'..:�;� `.- .kw w�.i. " ' -U-.ioerN �f . . . . <br /> �\` Z".r?.---�..... ,� ..t,__. s,ra,�r. ��1. � � • 100 Psf(�.YI��) <br /> `��'-- � --------------- � �. � light Whkle <br /> —� — ....�,.,1i� i' � . . 250 p�f(721�a <br /> ..__� . � Rosdway <br /> Sails <br /> iab/e 13.1 <br /> • Soil conditions behind and below each retaining wall have <br /> a dtrecl ellect on the strength needed in lhal mtaining wall. ' <br /> Ihe pressure from 6ehind the wall will vary substantially <br /> depending on the soil rype. In general, a wall built in clay �. � <br /> soils will require more reinforcement than a wall of ihe same <br /> hcight built in free draining sand or gravel soils. Clay 27° 2,500 Ib/ft' S0 Ib/ft' <br /> • Check Ihe soil type and conditions at the base of each <br /> wall for adequate bearing pressure. Thr. soi� below a <br /> wall needs to be strong enough lo support lhe weight of Mixad Soils 32° 3,500 Ib/R' 35 Ib/ft <br /> the wall resting on it. When moisture is presen4 eztra <br /> precautions may be required to provide a stable base. <br /> • If the soils at Ihe base of the wall have been dislurbed�i.e. Sand/G►avel 36° 4,000 Ib/ft' 30 Ib/ft' <br /> excavated and replaced � il is imperalive lhat these soils <br /> are properly compacled 6efore construc�ion begins. I�may <br /> be necessary to remove poorly compacted or soR, wet Use Ihe wil classi�cation chart above ro identiry tne basic properties W me <br /> orc�anic soils at the base and replace them wilh stable, �il at tlre sire. Ihese soil pc�erties are appmximate. Fa a tlaragh soil <br /> well compacled soils prior to wall construction. ana�ysis, have a quaiilied geotecmical ergineer car0uct a siie ir�spcction. <br /> �3 Sec refemncc 4, 5, 6. 7, 21 <br />