Construction joints in large retaining walls.
Retaining wall expansion joint detail.
For cantilevered and gravity walls vertical expansion joint spacing shall be a maximum of 60 feet on centers.
Expansion joints should be located at intervals up to 90 feet.
9 1 introduction 9 2 contraction joints 9 3 isolation or expansion joints 9 4 construction joints.
When the dimension of the retaining walls is becoming significantly larger usually a construction joint with a shear key can not be provided.
These joints may be filled with flexible joint fillers.
Backfilling against reinforced concrete retaining walls shall not be permitted until the concrete has reached its 28 day strength.
Although the details in figure 3 show vertical reinforcement on each side of the control joint walls that do not otherwise require vertical reinforcement will not require reinforcement at the control joints.
Vertical expansion joints are incorporated into the wall to account for expansion due to temperature changes.
The joints permit free longitudinal movement and some also allow the transfer of lateral or out of plane shear loads.
Typical control joint detail figure 16.
8 2 types of joints in concrete walls 8 3 contraction joints 8 4 isolation or expansion joints 8 5 construction joints.
Precast concrete cantilever wall expansion joints shall be in accordance with the standard specifications section 6 11 3 3.
Typical expansion joint detail backfill and drainage requirements.
Greased steel dowels are often cast horizontally into the wall to tie adjacent sections together.