A06 -140L1721Q0009 - Section 02322_1.pdf

EXCAVATION AND FILL FOR STRUCTURES

Canyon Pintado Fence Improvements [12/99]

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SECTION 02322

PART 1: GENERAL

1.1 SUMMARY

A. Section Includes: Excavating, backfilling, and compacting for structures.

1.2 DEFINITIONS

A. Unclassified Excavation: Shall consist of the material excavated regardless of its nature.

B. Common Excavation: Removal of materials which can be excavated using a compact excavator with a minimum bucket digging force of 4500lbf shall be considered common excavation.

1.3 QUALITY ASSURANCE

A. Failure Criteria: Not limited to the following:

1. Settlement of backfill which would allow moisture to pond against the foundation or within a horizontal distance from the foundation equal to its design depth.

PART 2: PRODUCTS

2.1 MATERIALS

A. General: Material excavated shall be unclassified. Material from excavations shall be used unless it contains ice or frozen earth, debris, earth with high moisture content. Materials removed in clearing and grubbing shall not be used for backfill.

B. Bedding for Concrete Slabs: CDOT Class 6 crushed aggregate.

PART 3: EXECUTION

3.1 INSTALLATION

A. Excavation: Excavate to the lines, grades, and elevations as shown on the drawings and as staked in the field.

B. Bedding for Concrete Flatwork: 6” minimum depth of crushed Class 6 aggregate placed and compacted under the entire surface area of the concrete slab.

C. Backfilling: A minimum of 72 hours after concrete has been placed and forms removed, place backfill material in horizontal layers not more than 8-inches thick loose. Place in a manner as to prevent wedging action or eccentric loading upon or against the slab. Excess material, if applicable shall be disposed of onsite as directed by the Contracting Officer.

Canyon Pintado Fence Improvements [12/99]

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D. Compaction: Immediately following final spreading and smoothing, each layer shall be compacted full width. Compaction shall be accomplished by means of a vibratory plate compactor, minimum 3,500 lbs. compacting force, or approved equal. A minimum of two passes shall be made over the entire width of the area and/or continued until the material visibly stops compacting. Add or remove water when necessary to obtain compaction.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT

A. Payment: No direct payment for the work described under this section will be made. Consideration for this item shall be included in the bid price for other items of the Contract.

END OF SECTION