What is ASTM d1143?

Standard Test Method for Piles Under Static Axial Compressive Load1. This standard is issued under the fixed designation D 1143; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

What is pile load test?

Static pile load testing is one of the most common methods for testing the actual in-situ capacity of a pile. The test program involves the direct measurement of pile head displacement in response to a physically applied load.

What is DMC method of piling?

DMC piling means Direct Mud Circulation piling. Here Installation of Pile Foundation is done Using Direct Mud Circulation Method (DMC). Direct Mud Circulation method is best suited when sufficient working-space is available for piling . The tools and machine required for DMC piling are. 1) Tripod with pulley.

What is safe load of pile?

Ratio between maximum and minimum safe pile capacity for clayey soil is 18.5 and for sandy soil it is 21.76. Safe capacity in terms of structural safety of this pile with M20 and M25 RCC are however 65 and 75 ton respectively.

Why bentonite is used in piling?

Bentonite helps to maintain the quality of concrete in the pile foundation. If bentonite is not used, the soil particles may get mixed with the poured concrete, resulting in a lower grade of concrete. 4. Bentonite acts as a lubricant material for the pile driving equipment & hammers reducing the boring friction.

What is the minimum length of pile?

Minimum dept of pile foundation is 2.5 m and it goes upto any length between 20–25m also but depends on the type of pile and soil strata at founding level.

What is pile capacity?

The pile capacity is defined as the load mobilized at the pile head displacement of 10%B. the cone resistance at pile toe is used in the formulas and no averaging procedure is done. From: Piezocone and Cone Penetration Test (CPTu and CPT) Applications in Foundation Engineering, 2020.

How do you calculate pile capacity?

Step 2: compute the ultimate end bearing capacity (acting as individual piles). Ultimate end bearing capacity in clay = Nc × C × pile tip area (Nc = 9). Ultimate end bearing capacity in soft clay = 9 × 120 × π × diameter2/4 = 848.2 lbs/per pile. Total ultimate bearing capacity per pile = 76,920 + 848.2 = 77,768 lbs.