-2.04 PAYMENT Not Used 46-3 SOIL NAILS 46-3.01 GENERAL

46-3.01D(2)(b)(ii) Test Procedure

Determine the test load using the following equation:

T = Lb x Qd
where:

T = test load, pounds

Lb = soil nail bonded length, feet, 10 feet minimum

Qd = design pullout resistance shown, pounds/foot

Perform verification testing in the Engineer's presence.

Install and test 2 verification test soil nails for each wall zone. You may install and test the nails during stability testing.

Conduct the verification test as follows:

1. Incrementally load the test soil nail as shown in the following table:

3. Measure and record the applied test load and the nail head movement at each load increment.

4. During the creep test:

4.1. Hold the load constant for 60 minutes.

4.2. Start the observation period for the load hold when the pump starts to apply the load increment from 0.80T to 1.00T.

4.3. Measure and record the nail head movement at 1, 2, 3, 4, 5, 6, 10, 20, 30, 40, 50, and 60 minutes.

4.4. Plot a creep curve as a function of the logarithm of time, showing the nail head movement from 6 to 60 minutes.

5. If the movement measured from 6 to 60 minutes is less than 0.08 inch:

5.1. Increase the load incrementally to 1.50T.

5.2. Hold the load constant for 10 minutes.

5.3. Start the observation period for the load hold when the pump starts to apply the load increment from 1.25T to 1.50T.

5.4. Measure and record the nail head movement at 1, 2, 3, 4, 5, 6, and 10 minutes.

5.5. Reduce the load to the ending alignment load and record the residual movement.

6. If the movement measured from 6 to 60 minutes is 0.08 inch or greater, reduce the load to the ending alignment load.

Submit revised shop drawings for additional verification test soil nails.

The Engineer determines the cause of failure for each rejected verification test soil nail.

If the Engineer determines that the installation methods are the cause of failure, the installation methods are rejected. Show alternative installation methods on the revised shop drawings.

If the Engineer revises soil nail lengths or design pullout resistance values, any additional verification test soil nails are change order work.

Install and test additional verification test soil nails until they comply with the acceptance criteria.

Log horizontal borings for additional verification test soil nails and submit a test boring report under section 46-3.01C. The logging of horizontal test borings and the submittal of the test boring report is change order work.

46-3.01D(2)(b)(ii)(3) Proof Test

Production soil nails must be represented by proof test soil nails within a given wall zone.

Perform proof testing in the Engineer's presence at the locations shown.

Test against a temporary yoke that bears directly on the shotcrete facing. Test loads transmitted through the temporary yoke must not fracture the shotcrete or cause displacement or sloughing of the soil surrounding the drilled hole.

Conduct the proof test as follows:

1. Incrementally load the test soil nail as shown in the following table:

3. Measure and record the applied test load and the nail head movement at each load increment.

4. During the creep test:

4.1. Hold the load constant for 10 minutes.

4.2. Start the observation period for the load hold when the pump starts to apply the load increment from 0.80T to 1.00T.

4.3. Measure and record the nail head movement at 1, 2, 3, 4, 5, 6, and 10 minutes.

5. If the movement measured from 1 to 10 minutes is greater than 0.08 inch:

5.1. Hold the load constant for an additional 50 minutes.

5.2. Measure and record the nail head movement at 20, 30, 40, 50, and 60 minutes.

5.3. Plot a creep curve as a function of the logarithm of time, showing the nail head movement from 6 to 60 minutes.

6. Reduce the load to the ending alignment load and record the residual movement.
Production soil nails represented by proof test soil nails that fail to comply with the acceptance criteria, except those represented by proof test soil nails selected for supplemental testing, are rejected.

Submit revised shop drawings for replacement soil nails that show alternative installation methods, revised production soil nails, or a modified soil nail plan.

The Engineer selects up to 1/2 of proof test soil nails for supplemental testing. Only proof test soil nails with a creep movement less than 0.08 inch measured from 1 to 10 minutes are considered for supplemental testing.

Perform supplemental testing immediately following creep testing. Incrementally load the soil nails as shown in the table titled "Proof Test Loading Schedule." Record the test load and nail head movement as part of the test data.

For proof test soil nails that fail supplemental testing, the Department deducts $1.00 per linear foot of proof test soil nail.

46-3.01D(2)(c) Grout

Place the test batch grout in an excavated hole or a container of suitable size to allow testing under California Test 533. The test batch must comply with the specified nominal penetration.

Dispose of the grout after testing.

46-3.01D(3) Department Acceptance

46-3.01D(3)(a) General

46-3.01D(3)(b) Load Testing

46-3.01D(3)(b)(i) General

46-3.01D(3)(b)(ii) Acceptance Criteria

1. For verification tests:

1.1. Creep movement measured from 6 to 60 minutes is less than 0.08 inch.

1.2. Creep rate is linear or decreasing in time logarithmic scale from the 6- to the 60-minute reading.

2. For proof tests, the creep movement complies with one of the following:

2.1. Creep movement measured from 1 to 10 minutes is no more than 0.08 inch.

2.2. Creep movement measured from 6 to 60 minutes is less than 0.08 inch and the creep rate is linear or decreasing in time logarithmic scale from the 6- to the 60-minute reading.

3. Total measured movement at the maximum test load minus the measured residual movement at the ending alignment load exceeds 80 percent of the theoretical elastic elongation of the unbonded length.

4. Pullout failure does not occur.