1315 PACIFIC AVE 2018-01-01 MF Import

7. Provide a structural connection bctween the existing foundation and the soldier piics,and 8. Construct the remainder of thc soldier pile wall. Slant pile undc�inning requircs carcful con:rol of caving soil candieions in order to prevent excessive settlement bclow cxisting foundations. Where caving soils arc prcsent, thc ace of drilling mud may be necessary. The bottom of the drilled shafts for soldier piles should be cleaned out prior to placing concrcte in the shaft. The shafl bottom can be cleaned ut;ng a clean-out bucket or ather means proposed by thc contrac�or and approved by GeoEngineers. Steel wedges or jacks,-nd non-shrink grout can be used at the foundation/soldier pile connection to reduce thc settlement potentia. however,altemative strucwral connections may be necessary depcnding upon the cxisting foundation configuration and anticipated loads. SHORING MONITORING Pre-CortsbueNon Survey A shoring monitnring program should be cstablishcd to monitor Ihc perfomiancc of the cut section rctaining walls and to provide eady detection oC detlections that could potentially damagc nearby improvcments. We rccommcnd ihat a prc-construction survcy of adjaccnt im�rovements, such as streets, u�ilities, and buildings, be perfortncd prior to commcncing construction. Thc pm-construction survey should include a vidco or photographic survey of the condition of cxisting improvcmcnts to establish thc prc-construction condition,with spccial attcntion to cxisting cracks in strcets or buildings. Opt7cal Survey Thc shoring monitoring program should includc an optical survcy monitoring program. The rccommcnded frequcncy of monitoring should vary as a function of�he stage of consWction as presented in thc follow�ing tablc: Conrtruatloe l/q� MonNo�MiY F�y During eccavation and until wall movements have stabilized Twice Neekly __ _._ ... .... _ . — . __�._ ------.._- _.._ During excava�ion it lateral wall movaments ezceed 1 inch and until Dally wall movements have stabilized __. _.... . __. .._. ._.._.. -- � -------------- Aner er,cavation is completelwall movements have sWbillzed and twice monthly pnor lo the floors of Ihe building reaching the top of Ihe excavatian Monitoring should include vertical nnd horizontal survey mcasurements accuratc to at Icast 0.01 fcct. A bascline reading of thc monitoring poinls should be completed prior to bcginning shoring installation. The survey data should be provided lo GeoGngineers for revicw within 24 hours. i'or shoring walls, we recommend that optical survey poin:s be established along the top of the shoring walls, at the wrb behind thc walls, and on cxisting buildings located within a horizontal distance of the shoring walls cqual to thc height of thc wall. The survcy points should bc spaced every 25 feet along thc wall face and the points along the curb lindcxisting buildings should be located immediately behind the points along the lop of thc H�aIL Additional survey points should also be installed at mid-height of the wall as thc cxcavation progresscs if latcral movcmcnts cxcced 1 inch, at thc samc spacing as thc poinu along the top of the �call. If latcral wall mo�cmcnts arc obscn•cd to bc in cxcess of '/:inch betwcen sucecssiee readings or if total wall mo��ctneNs cxceed 1 inch, construction of Ihc shoring walls should be ni,.co_rtu-onr-oo PaR�'9 GeoEwe�M[t�s� ✓��•�.1,�d,�� 13