Distance Between Expansion Joints In Concrete Retaining Walls

The friction of the concrete is the key factor that limits the movement.

Distance between expansion joints in concrete retaining walls.

Some designers recommend re ducing joint spacings by about 20 in walls with frequent openings such as doors and windows. Generally the spacing of the control joint is specified for a minimum of 20 feet 609 6 cm in the center. For soldier pile and soldier pile tieback walls with concrete fascia panels expansion joint spacing should be 24 to 32 feet on centers. There is a special check to be done at the construction joints when larger retaining walls or structures having very high lateral loads are designed.

Expansion joints are provided in every large structure which is subjected to high variation in temperature during its lifetime. The hight shear force is applied at the horizontal construction joints located at the lower level. Where control joints are provided in such a wall they widen as the concrete masonry shrinks preventing it from cracking. Also known as control joint kosmatka wilson 2016 expansion joint.

This temperature variation causes expansion and contraction in the structure. Tial basement walls and the national ready mixed concrete association ref. 4 recommends a contraction joint spacing of 30 times the wall thickness or 20 feet for an 8 inch thick wall 30 8 240 inches 20 feet. This type of joint is used in concrete or concrete masonry to impart a plane of weakness.

Expansion joints are provided to allow th. Say the calculated distance between the joints is 7 meters and the distance between columns is 7 meters then a calculated risk is taken by placing them at 7 meters. National concrete masonry association segmental retaining walls sales jump 3 in 2016. Expansion joints are not permitted in footings except at bridge abutments and where the substructure type changes such as locations where spread footing to pile footing occurs.

In a concrete structure. O reclamation a. Difference between control and expansion joints.