1920 75TH ST SE 2016-01-01 MF Import

Conifer Apartments September 8, 1976 Page 5even of angle joints be provided so that a hinged connection is effected in the sewer line between the building and fi;l, At entrances to the building there probably wi11 be continued settlement 4ihich wi11 tend to exaggerate the rise of the step from the exterior to the building. We recommend that there be a short level section or porch at the entrance. Then B or 9 inches of settlement can occur without creatin9 an excessive rise. 4Je expect that this should be an adequate allowance for future settlement. CO�JSTRUCTIOP� CONSIDERATIOWS For construction convenience it appears necessary to remove the carports and porches of the buildings and keep tenant parkin9 away from tfie area. The auger cast method of construction is not particularly neisy except for motors, most of which could be located to the south, array from the buildin9s and tenants. Wd anticipate that it will not be necessary to enter the buildin9s or to relocate the tenants during construction. Great care is necessary in the use of the auger cast pile construction method with the soils on this site. As already mentioned, the peat soils are soft. If th� auger is withdrawn too rapidly or if the cement grout pressure falls too lov�, the pile �-iill "pinch" and be diseontinuous. Only equipment which can pull the auger and pump 9rout sim�ltaneously should be usad and thc equipment should be capable of continuous and adjust�ble witlidrawal rate�. P. meter should be pro- vided so that the amount of grout placed can be continuously observed. Diming operation, the withdrawal rate and grout pumpin9 rate should be monitored so that high 9rout pressures are continuously maintained. Carc and exper•ience are necessary to see that the amount of grout p�mped is neither to small nor to great. 4Je recomnend that the grout piace- ment should equal t�aice the computed volume of the pile based on its nominal diameter. Pile len9ths will vary 1'rom the 20 foot minimum reco�nended, up to a maximuc� of about 30 feet near borin9 One. The lenqths should �