Hillside Repair

Need underpinning to permanently stabilize home or level floors in Berkeley? Call 415-457-5658 for a prompt, reliable estimate from our experienced estimator. RWR has been installing underpinning in Berkeley for over 24 years. You will see our trucks and equipment working in Berkeley, Berkeley Hills, and Kensington. Here's the kind of detailed estimate you can rely on, to correct foundation problems and perform structural work, including even zero lot line jobs that require our expertise:

Mobilization and Layout

• Mobilize to jobsite.
• Layout site per plans
• Daily Cleanup
• Final Cleanup

Install Funicular
• Install Funicular to assist in repair of hillside
• Install temporary car on funicular (Price does not include final car for funicular after construction work is completed).

Clearing and Grubbing
• Install erosion control measures per ILS Associates plans.
• Include debris catchment walls to be placed below work areas as work progresses
• Filter fabric to cover beach area during construction (All debris is to be cleaned at end of each day).
• Remove loose soil to accommodate installation of the soil nail wall. The excavated face shall be cleaned of loose materials. Keep this to minimum.
• Remove the material from the site and off haul.

Existing Parking Deck
• Reinforce existing parking structure as required.
• Includes removal and reinstallation of concrete pad at end of construction

Landing #1 and Landing #2
• Drill and install four (4) 18” concrete reinforced piers to support two (2) new landings per plans and specifications.
• Install perimeter footing and retaining wall for each landing.
• Install Rip Rap in front and side of lower landing as directed by engineer.

Barge Staging
• Stage bay barges at bottom of cliff to assist in construction project

Tiebacks
• Drill eighty one (81) 8” diameter hole x the designated depth per plans and specifications. (Final Depth subject to soil engineer approval)
• Install eighty one (81) 1 inch double corrosion tiebacks with bonded length and non bonded length per plans and specifications (see table).
• Place and install grout using standard grout mix
• Tieback is to extend at least 2 ft from face of hole (to be cut later)
• Install 1-1/4” thick by 8” x 8” plates, beveled washer and nuts.
• Test and pull each tieback per plans and specifications locking tieback off after initial matt of Shotcrete has been placed.

Excavate
• Excavate hillside to allow for installation of top edge, side edge and bottom edge (approximately 3 ft deep x 1 ft deep.
• Spoils are to be removed from site and off hauled.

Drainage
• Install geocomposite drain (Miradrain 6000) in chimney drain strips per plans and specifications S2.2.
• Terminate Miradrain at bottom into drain rock per plans and specifications S5.1.
• Include rock pocket on side edges and bottom edge with 4” SDR 35 perforated drain pipe per plans and specifications.
• Provide for 3” weep holes per plans and specifications above Shotcrete base footing 6/S5.1.
• Include perforated pipe at top and bottom of landscape pockets per plans and specifications.
• Connect all perforated pipe to 4” SDR 35 tight lines
• Install four 6” SDR 35 tight lines from top of wall connecting to D.I. drainage in V ditch and exit water to the bottom picking up 4” lines appropriately.
• Provide galvanized sweep section through wall footing at base of hill and discharge into catch basin filled with 3” cobbles.

Shotcrete
• Install Shotcrete edge footings per plans and specifications S2.1 and detail drawings 3/S5.1, 7/S5.1 and 8/S5.1.
• Install Shotcrete base footing 2.5 ft x 2.5 ft per plans and specifications S2.1 and 6/S5.1.
• Install approximately twenty two (22) landscape pockets per plans and specifications S2.1 and 5/S5.1
• Install double face of epoxy coated rebar using #5 rebar as shown on plans and specifications S2.1 and S5.1.
• Where tieback occurs provide additional reinforcement per plans and specifications 1/S5.1
• Install 8 inch thick Shotcrete per plans and specifications S2.1 and 4/S5.1.
• Install a second coat of Shotcrete to 10 total inches thick as indicated on plans and specifications
• Shotcrete to have 4800 psi minimum at 48 days.
• Shotcrete to be placed in accordance of Section 1925 of the 2001 CBC.
• Shotcrete to be natural finish with color applied after installation
Architectural Shotcrete
• After structural Shotcrete has been installed apply an additional Shotcrete layer on average 2 inches thick to appear as natural stone and made to blend into existing site.
• Apply stain to Shotcrete to match natural existing terrain color.
Terrace
• Excavate and install concrete reinforced continuous strip footing 1 ft 2 in wide by 1.5 ft deep and a maximum of 4 ft high for terrace per plans and specifications S2.1 and S5.2.
• Note: Price does not include future metal work, framing or metal deck with concrete slab. See alternative allowances below.