Answer:

The test used for separating the load carried by the pile into the skin friction and point bearing resistance is the cyclic load test.

Cyclic Load Test:
The cyclic load test is performed on piles to determine the load distribution between the skin friction and point bearing resistance. This test involves the application of repeated cycles of loading and unloading on the pile to simulate the dynamic behavior of the pile under actual working conditions.

Procedure:
The cyclic load test is typically conducted as follows:

1. Load Application: A hydraulic jack is used to apply the load to the pile head. The load is gradually increased in a series of steps until the desired maximum load is reached.

2. Load Cycles: Once the maximum load is reached, a series of load cycles are applied to the pile. Each cycle consists of loading the pile to the maximum load and then unloading it back to zero load.

3. Measurement: During each cycle, the load and the corresponding settlement or displacement of the pile are measured. These measurements are used to determine the load distribution between the skin friction and point bearing resistance.

4. Load Distribution Calculation: The cyclic load test allows for the calculation of the load distribution based on the measured load-settlement response. By analyzing the relationship between the load and the settlement, it is possible to separate the load carried by the pile into the skin friction and point bearing resistance components.

Advantages of Cyclic Load Test:
- It provides valuable information about the load transfer mechanism of the pile.
- It helps in estimating the ultimate bearing capacity and settlement characteristics of the pile.
- It allows for the determination of the skin friction and point bearing resistance distribution along the length of the pile.

In conclusion, the cyclic load test is the appropriate test for separating the load carried by the pile into the skin friction and point bearing resistance. This test provides important information for the design and analysis of pile foundations.