Pile Dynamic Load Test
(High Strain Dynamic Testing)

High-strain dynamic testing of piles using instrumented hammer drops to determine load capacity, integrity and driving stresses — providing rapid, cost-effective pile capacity data compared to static load testing.

Overview

What is the Pile Dynamic Load Test?

The Pile Dynamic Load Test (PDLT), also known as High Strain Dynamic Testing, uses instrumented hammer blows on the pile head to measure force and velocity signals. These signals are analysed using the CAPWAP method to determine static pile capacity, pile integrity, driving stresses and energy transfer — all from a single test.

Conducted as per ASTM D4945 and IS 14893, this method is widely specified by government agencies, NHAI, railways and private developers for routine pile acceptance testing. Global Lab's engineers use PDA (Pile Driving Analyzer) equipment with real-time CAPWAP analysis for immediate on-site interpretation.

Rapid Capacity Determination

Pile capacity determined from a single hammer blow — test completed in hours, not days.

CAPWAP Signal Matching

Advanced signal matching provides static capacity equivalent comparable to static load test.

Pile Integrity Check

Simultaneous assessment of pile integrity, defects and cross-section changes during testing.

Driving Stress Monitoring

Critical for monitoring installation-induced stresses in driven piles to prevent damage.

NABL Certified Reports

All results issued on NABL-accredited letterhead with calibration traceability.

Large Volume Testing

Suitable for testing 100s of piles per day — ideal for large infrastructure projects.

Test in Action

Pile Dynamic Load Test — Site Images

PDA Sensors Installed on Pile Head

Drop Hammer Assembly Ready for Test

Real-Time CAPWAP Analysis Display

Test Procedure

How the Pile Dynamic Load Test is Conducted

1

Strain Gauge & Accelerometer Mounting

PDA sensors (strain gauges and accelerometers) are bolted to the pile shaft at two diametrically opposite points near the pile head.
2

Signal Cable Connection

Sensor cables are connected to the PDA (Pile Driving Analyzer) unit positioned safely adjacent to the pile.
3

Hammer Drop & Impact

A drop hammer of known mass is released from a predetermined height to strike the pile head with a cushion in between.
4

Real-Time Signal Capture

Force and velocity traces are captured in real time by the PDA at 10,000 samples/second and displayed immediately.
5

CAPWAP Analysis & Reporting

Signals are analysed using CAPWAP software. Static capacity, soil resistance distribution and pile integrity results are issued in a NABL report within 48 hours.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
ASTM D4945	Standard Test Method for High-Strain Dynamic Testing of Deep Foundations	Dynamic Load Test	ASTM
IS 14893	Non-Destructive Integrity Testing of Piles — Guidelines	Pile Testing	Indian Standard
ASCE 20-96	Standard Guidelines for the Design and Installation of Pile Foundations	Design Reference	ASCE
BS EN ISO 22477-4	Geotechnical Investigation and Testing — Testing of Geotechnical Structures	Foundation Testing	European Standard

Applications

Where is the CAPO Test Used?

Routine acceptance testing of driven and bored piles on infrastructure projects

Verification of pile capacity for NHAI, Railways and government projects

Investigation of suspect piles showing anomalies in static load tests

Monitoring driving stresses for large-diameter driven steel pipe piles

Rapid assessment of pile capacity for tender and design verification

Post-disaster assessment of pile foundations in earthquake-affected structures

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsGovernment-accepted certificates for NHAI, Railways, PWD and all statutory bodies.

PDA Equipment with CAPWAPLatest generation Pile Driving Analyzers with full CAPWAP signal matching capability.

Autovity Digital PlatformReal-time report access and monitoring from any device 24/7.

Experienced Foundation Engineers15+ years of pile testing experience across highways, metro, ports and industrial projects.

Pan-India CoverageTeams based in Mumbai, Kolkata, Guwahati, Surat and Ahmedabad for rapid mobilisation.

Complete Foundation TestingPDLT + Pile Integrity + Static Load Test packages available for full foundation audit.

Pile Dynamic Load Test(High Strain Dynamic Testing)