1505 INDUSTRY ST Geotech Report 2018-01-02 MF Import

moisturc conditiuned. It ma}� be necessary to import sand and gra��el «�ith a low tines content to achicve adcqualc compaction for support of pavcment arcas, floor siabs and structures for wct wcathcr construction. Imponed stmcteral lill eonsisiing oC sand and gravel (1VSDOT gravcl borrow) should he pl:�nncd undcr all building Iluor slabs and foundation dcments and if construction occurs during �ect wi;ithcr. The use uf aristing u7-sitc tili soils .�s stnicwral fill durng wet wcather should be planned only for areas requiring compaction to 90 percent of�tUD, as long as ihe soils are properly protected from wet wcather ancl nut placed tiuring periods of prccipi�atian. The contrac�or should plan lo cover and maintain all fill stockpilcs with plaslic shccting if it will be used as struc�ural fill. The rcusc of on-sitc soils is highly dcpcnden[ on thc s:<ill of thc conlractur and schcdulc, and �ac �.vill work with thc dcsign tcam and contracmr to maximize the rcuse o(on-site till tioils during the wet and dry seasuns. �ill Plncement and Compactinn Criterin. Siructural fill should bc mechanically compacted ta a firtn, non-yiclding condilion. Sln�ctur�l fill should L•c pl;:ccd in loosc IiRs not cxcccding �3 to 10 inchcs in thickness. The actual thickncss wil! 6e dependcnt on the stmctural fill matcrial used and thc ripe and size uf compaction equipment. �ach IiR sha:ild be canditioned to the proper maisture content and compacted to thc spccificd dcnsity bclixc placing subscqucnt IiRs. S�ructural till should bc compacted to thc fullowing critcria: i. Strucwral �iil placcd bchind bclow-gradc walls should be compacted ta bchveen )0 to 92 percent oF thc MUD estimated in accordance with AST�I D I»7. Care should be taken when cumpacting fill ncar thc facc of bclow-grade �valls to avoid ovcrcompaction and hcncc ocrrstressing Ihc walls. I�land-uparatcd compactors shuuld 6c uxd within � Ccet b:;hind thc wall. �1';ill b:icktill plucecl within Ihe building (outprint and under the second flour Ievel should te cnmpacicd to bctwccn 90 ro 92 perecnt o� thc �IDD within � fcc[ oC the walls and to at Icast 9� percent of the MDD b�Vund 5 fcet of tl�c ��•alls. "Chc upper 2 fcet oF fill bclow �loor slab subgr;�dc should also be compacted to at leas[ 9� percent of thc �tUD. 'lhz contractor should � kc�p :dl heuvy construction equipmeut awa}' ��m the �op uf retaining walls :; dis-tance equal to unohalf the hcight of tlic wnll, or at Icas[5 fcct, which cvcr is grc:ucr. ?. titructural till in new pavement and hardscape areas, including utility trench bat4fill, should be cumpacled to at Ieast 90�ercent of tlie �IDD atimated in accord:�nce with r1STh1 D 1�57, exeept that Ihc upper 2 fcet of till bclow final subgradc sl�ould bc compactcd ro at Icast 95 perecnt of thc :�II)D, scc Figurc�4. - 3. :,hiictural fill placed bclow Iloor slabs and foundatiuns shuuld be compacted to 95 percent uf the i�tUD estimated in accordance�vith e\STbt ll 1�57. 4. :itnictural fill placcd as cnisficd rock basc coursc below pavcmcnts sliauld bc compactcd to 95 percent of the �1DU estimated in:ucordance with ASTM D I�57. 5. Von-stnicturnl lill, such as fill placed in landscapc areas, should bc compacted to ai Icast 35 percent of thu MUD cstimated in accordance with r\STM D 15�7. In arcns intended ror fiiture devclopment, a higher degree of compaction should be considered to reduce the se�dcment potcntinl of thc fill soils. � �Ve:ither Considcr:rtions. Disturb:mcc of nc�r-surface suils should be cxpectcd if earthwork is rumpictcd dm'ing periuds of�vct wcathcc During dry wcathcr, th�: suils will (I)hc less susccptiUlc to disturbancc. 1_') pruvidc bcticr suppurt tor ronstnution a;uipment, and (3)be more likely to mcN. the rccpii�c�l cump.ictinn rriteriu. i�ll,�:'�,_!:nl:+.,�r�r bu �� Pa�cB GEOENGINEEIIS� .Lnn 'f.:l:u�