GEO5 软件

在线帮助

Tree
Settings
Program:
Language:

Schmertmann

The Schmertmann method determines the maximum pressure at pile base pmax, base as follows:

where:

αp

-

pile base coefficient

qupr

-

modified equivalent average cone tip resistance

where:

qc1, qc2

-

minimum value of the mean of cone tip resistance

In cohesionless soils the analysis takes into account the influence of overconsolidation (OCR).

The maximum shaft friction pmax,shaft is given by following formulas:

  • for cohesionless soils:

where:

K

-

correlation coefficient of skin friction

-

mean value of penetrometer sleeve local friction fs in the interval given by bracket subscript

As

-

area of the pile shaft surface in a given interval

d

-

diameter of pile

D

-

embedded pile length

  • for cohesive soils:

where:

αs,i

-

shaft friction coefficient according to Tomlinson in the ith layer

-

mean value of penetrometer sleeve local friction fs in the ith layer

As,i

-

area of the pile shaft surface in the ith layer

Literature:

Schmertmann J.H.: Guidelines for Cone Penetration Test, Performance and deign, U.S. Departments of Transportation, report No. FHWA-TS-78-209, Washington,D.C., 1978.

Try GEO5 software for free.