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GEO5

Stromeček
Nastavení
Produkt:
Program:
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Double-row Pile Wall

The program allows us to model the double-row pile wall in the "Geometry" frame.

The structure consists of three parts:

  • front row
  • back row
  • connecting beam

The cross-section is selected for each part separately. The connection of the front and back row with a connecting beam is considered as rigid and the wall forms a portal frame.

The influence of normal force is considered for dimensioning of cross-section.

Calculation model - 1) front row, 2) back row, 3) connecting beam

The structure is loaded by three main loads:

  • earth pressure behind the back row
  • earth pressure in front of the front row
  • earth pressure between the front and back row

The earth pressure acting on the front and back row is calculated in the same way as in the case of a standard wall.

The pressure between the front and back row is determined according to:

Where:

pc

-

resultant pressure

kc

-

stiffness coefficient of soil between the front and back row

Δv

-

difference of deformation of the front and back row

pc,0

-

initial earth pressure acting between the front and back row

The soil stiffness coefficient is calculated as follows:

Where:

Eoed

-

oedometric modulus

sy

-

distance between the front and back row

d

-

diameter or height of the corss-section

The initial earth pressure between the front and back row is determined by the following formula:

Where:

α

-

calculation coefficient; if α > 1 then α = 1

pa

-

active earth pressure

sy

-

distance between the front and back row

d

-

diameter or height of the corss-section

h

-

final excavation depth

φm

-

average value of the angle of internal friction

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