HomeMy WebLinkAboutFile Documents.614 North St.0248.2017 (88).ARBK0248.2017.arbk_Eng_2
Page:2
Author:justinf
File Name: 614 W North StShoring03-14-18.pdf
Conflicts exist with the shoring
and the existing waterline,
drainage pipes for the drywell,
and new concrete footings.
Coordination between building
structural plans, shoring plans,
and civil design is needed that
will require resubmission.
2 (2)
Page:2
Author:justinf
File Name: 614 W North StShoring03-14-18.pdf
Standard detail for surrounding
a drywell is 18 inches of backfill
for drainage and structural
layers. The close proximity of the
drywell to shoring prevents this.
The geotechnical engineer
should provide documentation
that the drywell will drain
appropriately out of the sides
and that drainage can occur at
the required rate calculated by
the civil engineer with the
shoring walls and impervious
liner in place. Additionally, the
geotechnical engineer will need
to confirm that there will be
proper support between drywell
and shoring that will prevent
sinking/caving of the soils &
sidewalk above.
Proposed MicropileCap Location
Micropile WallEnd Wall
Micropile WallBegin Wall
Micropile WallTurn Lines 1 and 2
Heavy loads shall not be placedbetween ground nail wall and thisline (Sheet Grade-4, Note 7.5)
0+30GRADE-5
0+15GRADE-5
0+10GRADE-5
Conflicts exist with the shoring and theexisting waterline, drainage pipes for thedrywell, and new concrete footings.Coordination between building structuralplans, shoring plans, and civil design isneeded that will require resubmission.
Proposed MicropileCap Location
Micropile WallTurn Lines 1 and 2
Heavy loads shall not be placedbetween ground nail wall and thisline (Sheet Grade-4, Note 7.5)
Heavy loadsbetween groline (Sheet
0+30GRADE-5
0+15GRADE-5
0+10GRADE-5
Standard detail for surrounding a drywell is18 inches of backfill for drainage andstructural layers. The close proximity of thedrywell to shoring prevents this. Thegeotechnical engineer should providedocumentation that the drywell will drainappropriately out of the sides and thatdrainage can occur at the required ratecalculated by the civil engineer with theshoring walls and impervious liner in place.Additionally, the geotechnical engineer willneed to confirm that there will be propersupport between drywell and shoring that willprevent sinking/caving of the soils & sidewalkabove.
The existing water service line will be routed to the west of the proposed drywell to mitigate any potential conflicts during construction. See sheet C-104 for proposed water service layout. The drainage pipes in question will be installed after the drywell and shoring. The drainage pipes depth of bury is above the proposed micropile wall; no conflict will occur.
The micropile wall layout has been adjusted for the 18" of screened rock to surround the drywell. The drywell will be backfilled with screened rock, a self compacting material. The drywell detail on sheet C-501 has been modified to reflect this. The geotechnical engineer has supplied a memorandum stating the drywell can properly infiltrate through the micropile wall towards the North Street ROW and that the backfill material of screened rock will not allow for any sinking/caving surrounding the drywell as part of this submittal. The existing sidewalk will be removed and replaced once the drywell and all other construction is complete.
5/4/2018