SECTION 674 — STONE SLOPE WALLS

674.1 DESCRIPTION — This work is construction of plain or mortared stone slope walls.


674.2 MATERIAL —

(a) Stone. Use stones of acceptable quality, sound, and free from structural defects and foreign substances. Submit samples to the MTD for petrographic examination prior to use, unless the rock comes from material providing an approved Type A aggregate. Use stones not less than 3 inches thick, of a length at least three times the thickness, and of a width at least equal to the depth of the slope wall, except for spalls for packing voids. For stones in excess of 6 inches thick, the minimum length may be twice the thickness.

(b) Other Material.

• Class A Cement Concrete — Section 704
• Premolded Expansion Joint Filler — Section 705.1
• Mortar — Section 705.7(b) except use Type C, fine aggregate.
• Filler — Acceptable coarse sand, gravel, or other materia.
• Geotextiles, Class 2, Type B — Section 735


674.3 CONSTRUCTION — As shown on the Standard Drawings and as follows:

(a) Plain Stone Slope Wall. Place Geotextiles, Class 2, Type B, as specified in Section 212.3(c). After placing geotextiles, set stones by hand and firmly bed on the prepared graded area, with the length dimension approximately parallel to the toe wall foundation. Bed stones one against the other with ends and sides in contact, then break joints. In toe wall and cutoff wall areas, lay the stones flat; in anchor wall areas and on sloped areas, set the stones on edge.
Pack spaces between the larger stones with spalls, then ram into place. Tamp the whole area of the wall to a tight, even surface. Sweep filler over the surface until voids are filled.

(b) Mortared Stone Slope Wall. Set the stones as specified in Section 674.3(a). Fill the voids with mortar and spalls, as required, to within 1/2-inch of the surface of the adjacent stone. Use mortar with a stiff but workable consistency. Pointing is not required. Do not hammer, roll, or ram the stones after mortaring. If the bond around stones becomes broken, remove stones and mortar, reset the stones, and fill the voids with mortar, as specified.
Do not place mortar in freezing weather, unless permitted in writing, and then only with adequate protection. Remove and replace work damaged by frost. Protect completed wall from the elements and cure with water for a period of at least 3 days.

(c) Toe Walls, Cutoff Walls, and Anchor Walls. May be constructed of concrete, as specified in the applicable parts of Section 1001.3.


674.4 MEASUREMENT AND PAYMENT —

(a) Plain Stone Slope Wall. Cubic Yard

(b) Mortared Stone Slope Wall. Cubic Yard

No Supplement

BACK TO TABLE OF CONTENTS