Technical Manual

Inc.

p 289

APPENDIX 3D

MODEL SPECIFICATION – HYDRAULICALLY-DRIVEN PUSH PIER SYSTEMS

Chapter 3

Hydraulically-Driven Push Piers

11.1.7 Final hydraulic pressure/force at the termination depth

11.1.8 Lift and/or lock-off pressure/force readings

11.1.9 Amount of lift achieved at each pier location (if applicable)

11.1.10 Calculated geotechnical capacity based on final drive and lock-off force resistance

11.1.11 Comments pertaining to interruptions, obstructions, or other relevant information

FIELD COMPRESSION LOAD TESTING

12.1 If field compression load testing is required, the Installing Contractor shall furnish all labor,

equipment and pre-production push piers necessary to accomplish the testing as shown in

the approved pier design documentation. Installing Contractor shall apply the specified loads

for the specified durations and record the specified data, for the specified number of piers.

No deviations from the test plan(s) will be allowed without explicit approval in writing from the

Owner. Pier testing shall be in general accordance with the ASTM D1143 quick test method and

the following criteria:

12.1.1 Failure criteria shall be determined by the Owner prior to load testing

12.1.2 The test pier shall have been installed to the required final drive force and then unloaded

prior to start of test

12.1.3 The reaction frame requirements in ASTM D1143 shall not apply. The test setup will

include calibrated pressure gages with a calibrated hydraulic ram installed in-line with

the bracket and pier shaft to enable using the existing structure’s weight as the reaction

force during testing.

12.1.4 An alignment load equal to 5% of the maximum anticipated test load may be applied

prior to the start of the test to take out slack in the test equipment.

12.1.5 Loading increments shall be in accordance with the ASTM D1143 quick test method

with a maximum loading increment of 5% of the maximum anticipated test load and a

minimum hold time of 4 minutes at each increment.

12.1.6 The maximum test load shall not exceed the final pier drive force determined in Section

12.1.2.

12.1.7 Upon completion of the maximum test load hold increment, the pier shall be unloaded

in 5 to 10 even increments with minimum hold times of 4 minutes at each increment

12.2 Installing Contractor shall provide the Owner, copies of raw field test data within 24 hours after

completion of each load test. Formal test reports shall be submitted within 30 days following

test completion. Formal test reports shall include the following information:

12.2.1 Name of project and Installing Contractor’s representative(s) present during load testing.

12.2.2 Name of manufacturer’s representative(s) present during load testing, if any.

12.2.3 Name of third party test agency and personnel present during load testing, if any.

12.2.4 Date, time, duration and type of the load test.