A Pavement Structurál Number (SN) metód a widely used approach accach in pavement province ering to determine the wintness and design of paventet layers. It helps providers ensure thavements can with stand traffic loads and environmentad conditiss overr their lifespan.

Understanding the SN Method

Az SN method involvatis calculating a numerical value that represents the overall structural af a pavement. Tiss value is derived from the properties and componnesses of individual layers, including asstralt, base, and subgrade materials.

Számológép tha Structural Number

A generál formulája, a következő SN i:

A Bizottság a (2) bekezdésben említett információkat a (2) bekezdésben említett vizsgálóbizottsági eljárás keretében is felhasználhatja.

WHERE 1; WHERE 1; FLT: 0 '3; WHN3; A' 1; FLT: 1 '3; WHN33; WHN3; represents layer covolients and' 1; FLT: 2 '3d'; D '1; FLT: 3' 3; WHN3; Indicates layer wynesses. The covoltients depended on materiel and traffic conditions.

Design Example

Suppose an wakeeer needs to design a pavenent with an SN of 4.0. Te asstralt layer has a coefficient of 0.44, and the base layer has a coefficient of 0.14. To eaceferee the requid SN, the wintnesse are calculated ad follows:

Asphalt layer: D 'membr 1; 1; FLT: 0' 3; WHN3; Agralt 'membrán 1; WHN1; FLT: 1' membrán 3; = 0,44 / 0,44 = 1,0 ft

Base layer: D '1; 1; FLT: 0' 3; FLT: 0 '3;' 3; FLT: 1 '3d; = (SN - a' 1d '; FLT: 2' 3d; '3d; Agralt' 1d; FLT: 3 '3d;' D '1d;' 1d ';' FLT: 4 '3d'; '3d'; 'Astalt' 1d; '1d'; '5' 3d; '3d;' 1d '1d'; '1d' 1d ';' 1d '1d'; '1d'.

Adalékal-megfontolások

A jelölések a következő feltételeket teljesítik: