۱۶ فروردین ۱۳۹۹
دسته:
کد : 520
geosynthetic

» عنوان : Geosynthetics on Pile

تعداد صفحات : ۷۴

فرمت : PDF

 

Table of Contents ( Geosynthetics on Pile )

  1.  General
  2.  Design (BS8006)
  3.  Design (EBGEO)
  4.  Model Experiments
  5.  Projects

BS8006 – Calculation of distributed load on reinforcement

An alternative theoretical solution which may be used to determine the vertical load acting across the reinforcement was presented by Hewlett and Randolph; this was based on the observed mechanism from model tests and considers a series of hemispherical domes The theory determines the arching efficiency E as the proportion of the embankment weight carried by the piles, hence the proportion of the embankment weight carried by the geosynthetic reinforcement may be determined (1 − E). It should be noted that the system was shown to fail at one of two critical locations, either at the crown Ecrownof the arch or the pile cap Ecap.

BS8006 – Calculation of distributed load on reinforcement

Distributed load on reinforcement calculated using the Hewlett and Randolph method The minimum distributed load acting across the reinforcement may be assumed to be dependent on the area coverage ratio of the pile caps relative to the pile spacing (a2/s2) and the relative height of the embankment relating to the clear span [H/(s − a)] between the piles. Irrespective of the arching theory, pile layout and embankment geometry, the geosynthetic reinforcement should be designed to carry at least a practical minimum proportion of the embankment loading equivalent to 15%.

BS8006 – Calculation of distributed load on reinforcement (Tension in the reinforcement)

The above equation has two unknowns Trp and  , and may be solved for Trp by taking into account the maximum allowable strain in the reinforcement and by an understanding of the load/strain characteristics of the reinforcement at different load levels. The above equation for Trp may be used for those reinforcements that can undergo deformation during loading, i.e. extensible reinforcements (e.g.polymeric). For inextensible reinforcements (e.g.metallic) alternative relationships should be used to determine their recommended tensile strength.

نظرات

نشانی ایمیل شما منتشر نخواهد شد. بخش‌های موردنیاز علامت‌گذاری شده‌اند *

*

آمار

  • 0
  • 33
  • 234
  • 1,362
  • 11,864