Standard Test Procedures for Measuring the Inclination of Deep Foundations

Importancia y uso:

5.1 Piling specifications often prescribe the maximum allowable pile deviation from the planned inclination. Such a deviation can be the result of variable soil profile, a drilling rig that is inadequate for the job and/or faulty workmanship. There is evidence to show that loading a pile that exceeds the specified inclination can introduce excessive bending moments and shear forces if the pile was designed strictly for axial loads. In excavation support consisting of a contiguous piled wall or diaphragm wall, an excessive deviation may eventually decrease the available basement space or create undesired gaps in adjacent piles and permit seepage or ground loss. Efficient control of pile inclination is therefore of utmost importance.

Note 2: Measuring the excavation profile to infer the pile inclination has the additional benefit of enabling the contractor to estimate the actual volume of concrete that will be needed. In addition, knowledge of the finished pile profile may assist in the analysis of pile integrity tests and load tests.

Subcomité:

D18.11

Referida por:

D8381_D8381M-21

Volúmen:

04.09

Número ICS:

93.020 (Earthworks. Excavations. Foundation construction. Underground works)

Palabras clave:

barrette; bored pile; crosshole testing; deviation; drilled shaft; gyro; inclination; inclinometer; integrity test; load bearing element; ultrasonic testing;