design of flexible pavement by group index method

saba April 14, 2022 design , index , of , pavement Comment

To design the thickness of the pavement you have to go through the following steps. Flexible Pavement Design Procedure.

Solved Design The Flexible Pavement Using Group Index Method Chegg Com

FLEXIBLE-PAVEMENT DESIGN BY THE GROUP INDEX METHOD.

. BASE WAS USED AS THE STANDARD THICKNESS FOR. An empirical method based on strength characteristics of sub-grade soil. Find out the Group Index Value GI of the soil.

An empirical method based on physical properties of sub-grade soil. Where a - percentage of soil passing through 75μ sieve in excess of 35 not exceeding 75. Cfrac 2l 2 3R 3R2l2.

The flexible pavement Group Index Method According to this method the thickness of the pavement is determined in reference to the design traffic load in terms of commercial vehicles and the alue of group index which is formulated on various soil properties as percent fineness liquid limit plastic limit and plasticity index. UP UNTIL 1947 A 6-IN. The mechanical extra widening required for 105 m wide pavement on a horizontal curve of radius R metre is given by.

TK TI 90-RC15 Here Ttotal thickness of pavement cm Knumerical constant0166 TItraffic index Rstabilometer resistance value C. Highway Engineers Highway Research Board in 1945. The group-index method was devised by the US.

Various Approaches of Flexible Pavement Design. Design of flexible pavement by group index method. Calculation total thickness T.

Assuming a group index of 10 and extra-heavy traffic 300 the chart indicates the necessity of a total thickness of 9. To design the thickness of the pavement you have to go through the following steps. So we must check if the final SN 3 is similar to the assumed SN.

Whether to specify 9 inches or 10 inches is then influenced by the dry weight. Ii Triaxial test method is an example of the semi. Group Index method of flexible pavement design is an empirical method which is based on the physical properties of the soil sub-grade.

L 2 2 R. The group-index of a soil an arbitrary index assigned to different soil types based on the percent fines liquid limit and plasticity index is defined by the following equation. A METHOD OF DESIGN BASED MAINLY ON GROUP INDEX AND HEAVY TRAFFIC HAS BEEN USED BY THE MISSOURI STATE HIGHWAY DEPARTMENT TO DETERMINE TOTAL THICKNESS TO RECOMMEND FOR FLEXIBLE PAVEMENTS.

A semi empirical method. Which of the below is a type of empirical methods used for the design of flexible pavements. I They are based on the strength properties of soil subgrade.

It is an empirical method that is based on the physical properties of the soil sub-grade. Before going to design the pavement we must know the structure of flexible pavement Calculation total thickness T. Group index method of design of flexible pavement is.

From the below chart for given group index of soil subgrade and traffic volume value select appropriate thick curve value of combined thickness of surface base and sub-base line which will give the total thickness of. The methods used for the design of flexible pavement can be broadly classified as empirical semi-empirical analytical and mechanistic-empirical methods. GI02a0005ac001bd Here athat portion of material passing 0074mm sieve greater than 35 And not exceeding 75 bthat.

Where l is the length of wheel base of vehicle in metres. Cfrac l 2 2R 2Rl2. Group Index Method can use it in two ways.

The expression for pavement thickness is given by the empirical equation. Higher SN means stronger pavement thus the impact of traffic on pavement deteriorations is less. Before going to design the pavement we must know the structure of flexible pavement 7.

For a soil the group index. In the AASHTO flexible pavement design traffic is considered in terms of ESAL for the terminal PSI Table 2013 for p t 25 We must assume the structural number of the pavement. Ii The Group index method CBR method and Mcleod method are empirical methods.

2 Semi-empirical or Semi theoretical method. 2 l 2 3 R. Since the group index of 10 almost exactly coincides with 110 lb.

I These methods are based upon the stress-strain function. Flexible Pavement Design Procedure. Design Of Flexible Pavement Design Of Flexible Pavement By Group Index Method Group Index is function of percentage material passing 200 mesh sieve 0074mm liquid limit and plasticity index of soil and is given by equation.

It varies inversely with fifth root of Computer value. A Group index method b Burmister method c Triaxial test d IRC method. Pavement is designed for a speed of 100 311Design Of Flexible Pavement By Group Index kmhr as per IRC Method In order to classify the fine grained soils 23 Soil Sub Grade Data within one group and for judging their suitability as 231For flexible pavement sub grade material an indexing system has been CBR of soil sub grade 5 introduced in HRB classification which.

2- GraphicallyIn this video we will learn how to design a Flexible Pavement using Group Index. From the below chart for given group index of soil subgrade and traffic volume value select appropriate thick curve value of combined thickness of surface base and sub-base line which will give the total. Ft a weight greater than 110 would be.

In this method the thickness of the pavement is decided based on the group index value which is given by - GI 02a 0005ac 001bd.

Solved Design The Flexible Pavement Using Group Index Method Chegg Com