static uplift test

WORK METHOD STATEMENT FOR

STATIC AXIAL TENSILE LOAD TEST ON PRESTRESSED HIGH STRENGTH

CONCRETE PILES (PHC)

(ASTM D 3689 - 07)

PROPOSED THERMA SOUTH ENERGY TORIL, DAVAO CITY

Appendix 6.3.5

Proposed Therma South Energy, Toril Davao City Precast Concrete Pile Test Method

of 8

TABLE OF CONTENT

I. STATIC AXIAL TENSILE LOAD TEST

a. Reaction Pile System b. Testing Equipment c. Cut-off Level

d. Measuring Movement of the Pile e. Protection of Testing Equipment f. Test Record Form

g. Test Loading Procedure

h. Criteria of Load Test Failure

II. DOCUMENTATION III. SAFETY CONTROL

Appendix 6.3.5


of 8

I. STATIC AXIAL TENSILE LOAD TEST General: The axial tensile load test for the 600mm prestresed high strength concrete test pile will be conducted using Reaction Piles, with a required maximum load of 450 Tons for the Coal Dome Area and 120 Tons for the Power Block Area. The design load is 150 Tons and 40 Tons using safety factor of 3.0. The set-up of the testing will be handled by the Contractor and so will not be discussed herein. The proposed load increment to be applied during the test was based on this assumption. A. Reaction Pile System The design, construction, test set-up and anchoring of the reaction pile system is the responsibility of the Contractor, and as such, will not be discussed in this section. B. Testing Equipment B.1. Hydraulic Jack An ENERPAC hydraulic jack system and pressure gauge capable of withstanding the pressure obtained under the test load will be used for the test. The general specifications are as follows.

Manufacturer Model No. Cylinder capacity

(metric tons)

Weight (metric tons)

Cylinder Effective Area (in²)

Diameter (meter)

ENERPAC

CLSG-100012

1000 1.5 227 0.56

B.2. Load Cell To minimize errors associated with computing the actual load from the pressure reading in the hydraulic jack, the test shall be conducted using a 1000-ton capacity load cell. The load cell will be equipped with spherical bearings to avoid eccentric loading.

Type / Model No.

Serial Number

Capacity (Metric tons)

Sensitivity (Metric tons)

Encardio Rite / ELC – 150S-H

6001 1000.00 0.1

Appendix 6.3.5


of 8

B.3. Dial Gauges

Pile settlement shall be measured using four (4) 50-mm travel dial gauges placed equidistant at four (4) locations around the pile. The stems of the gauges will bear on the glass surface. Magnetic clamps shall be used to anchor the gages to the reference beams, which are made adequately stiff with cross-connections.

Brand Maximum Run

Sensitivity Diameter of Face

MITUTOYO 100 mm 0.01 mm 75 mm

C. Piles Cut-off Level The test pile will be exposed by at least 500mm from the ground. The following section outlines the general procedures to be undertaken. Stiffener steel plate of 2 x 25mm will be place on pile top of flat, leveled and free of concrete imperfection, prior to hydraulic jack setting and installation. D. Measuring Movement of the Pile A minimum of four (4) dial gages shall be mounted on the reference beams approximately equidistant from the center and on opposite sides of the test piles, with stems parallel to the longitudinal axis of the test pile and bearing on the lugs firmly attached to the sides of the pile below the test plate. There shall be two parallel reference beams, one on each side of the pile, and oriented in such a manner that there supports is placed as far as practicable from the cribbing or test pile. Set-up will be generally in accordance with the ASTM provisions. E. Protection of Testing Equipment All testing equipment will be protected from necessary disturbances, both prior to and throughout the load test. It is recommended that a tent be provided to cover all the equipment and personnel in the test area to prevent natural elements such as rains, strong winds, too much sun, etc.) from entering and inundating the place during testing. F. Test Records Form All test readings will be recorded promptly and properly throughout the testing period. All records of testing will be submitted to the Engineer for review and comments. See attached Test Record Sheet Form.

Appendix 6.3.5


of 8

G. Test Loading Procedure In general, the testing procedure prescribed by the Client conforms to the Procedure A - “Quick Test”, and Procedure C – “Loading in Excess of Maintained Test” under Section 8.1.2 and 8.1.4 of ASTM D 3689 - 07.

The load test will be applied in the following manner:

APPLIED LOAD

(TONS)LOAD INCREMENT/DECREMENT

Minimum time to sustain load (minutes,

unless otherwise stated

0 0% -

22.5 5% of 450 Tons Max. Load 15 minutes

45 10% of Max. Load 15 minutes

67.5 15% of Max. Load 15 minutes











300 67% of Max. Load or 200% of Design Load 15 minutes

270 90% of 200% Design Load 15 minutes









0 0% 30 minutes

75 50% of Design Load 20 minutes




315 10% of 150 tons Design Load 20 minutes









450 100% of Design Load 2 hours




0 0% 20 minutes

835 MINUTES OR ABOUT 14 HOURS

if failure is not reached, then unloading follows:

TEST SHEET FOR 450 TONS LOADING (COAL DOME AREA)

TOTAL HOURS =

Appendix 6.3.5


of 8

APPLIED LOAD

(TONS)LOAD INCREMENT/DECREMENT

Minimum time to sustain load (minutes,

unless otherwise stated

0 0% -

6 5% of 120 Tons Max. Load 15 minutes













80 67% of Max. Load or 200% of Design Load 15 minutes










0 0% 30 minutes





84 10% of 40 tons Design Load 20 minutes









120 100% of Design Load 2 hours




0 0% 20 minutes

835 MINUTES OR ABOUT 14 HOURS

TEST SHEET FOR 120 TONS LOADING (POWER BLOCK AREA)

if failure is not reached, then unloading follows:

TOTAL HOURS =

If failure occurs, continue jacking the pile until the settlement equals to 15% of the pile diameter. Readings shall be taken at 0.5, 1, 2, 4, 8, 15 and 20 minutes after completing the application of each load increments. Reading shall be taken similarly for each decrement of loading.

Appendix 6.3.5


of 8

H. Criteria of Pullout Test Failure

Failure of Pile

The pile under test shall be deemed to have failed if any of the following observation is recorded: 1. When the maximum load of 450 tons has already been applied.

2. When the pile has an excessive movement without adding load.

3. Failure of the pile materials (due to defect in the pile).

II. DOCUMENTATION All necessary records and information gathered during the course of testing for static axial tensile load test will be recorded, and test result using the attached form will submitted to the engineer for review and approval. The top elevation of each anchor pile shall be recorded before and after the test by the First Balfour survey team III. SAFETY CONTROL

1. Toolbox meeting will be conducted to all personnel and worker to

enhance their respective function in the execution of testing operation prior to start of work activity.

2. During the execution of the testing only authorized person/technician are required to be within the testing work area.

3. All equipment operators will be provided with trained equipment spotter during the load application.

4. All personnel will be provided with proper and appropriate PPE that will be donned at all time during the course of testing operation.

5. Appropriate safety signage will be provided within the required working radius to prevent any workers in coming-in not involve on the testing operation.

6. All lifting cable and other lifting equipment accessories will be check adequately to ensure that they are safe prior to any usage in lifting operation of reaction beams.

7. All testing equipment, tools that are involved in the testing operation will be check.

8. Prior to testing, all operation that will cause vibration must be stop. 9. Reference beam and reaction movement shall be determined by

using a surveyor’s transit or level and target rod. In addition, readings shall be taken before applying any test load, at the proposed design load, at the max. test load and after removal of all load.

Appendix 6.3.5

STATIC AXIAL TENSILE LOAD TEST

(ASTM D3689 - 07)

PROJECT: RECORDER: PILE ID:

LOCATION: DATE STARTED: LENGTH OF TESTED PILE:

CLIENT: DATE FINISHED: DESIGN CAPACITY:

ELAPSED LOAD HYD. JACK LOAD CELL TOTAL REMARKS

DATE TIME TIME INCREMENT PRESSURE READING LOAD AVE. @ TIME TOTAL

(mins.) (tons) (psi) (tons) (tons) 1 2 3 4 READING INTERVAL CUMMULATIVE

Prepared By: Noted By:

page __ of __

DIAL GAUGE READING SETTLEMENT (mm)

( 0.01mm / div)

AGES CLIENT OWNER CONSULTANT

Appendix 6.3.5

Sample Dial Gauge Set-up

Appendix 6.3.5

Typical Dial Gauge Set-up

Appendix 6.3.5

static uplift test

Documents