Filling and backfilling works of soil-civil engineering

Filling or backfilling of soil
Procedure for filling of soil
1.The site area to be filled shall be cleared from vegetation,debris etc.
2.the survey has to be taken for determining the depth of filling
3.the setting out of boundary has to be done in terms of chainage
4.pegs to be installed showing the filling depth marked by marker
5.say the filling depth as 300mm ,then pegs should be installed indicating it
6.if required combigrid of suitable size shall be placed 
7.start filling with 300mm layer soil from one side and complete till the whole area
8.do the compaction as per specifications
9.condut the FDT or field CBR test as reccomended by engineer
10.obtain the result and check all the output are satisfied ,if not repeat the same procedure till the test result are passed.
Compacted soil

Leveling of soil for compaction by motor grader

Filling of soil

Compaction of soil


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Settlement markers Settlement markers are the instruments installed in the soil backfill .this will help us to monitor the settlement of compacted soil.it consists of square 1*1m steel plate welded to a hollow pipe section.the hollow pipe will run along the height of the section. The settlement is placed on the first layer of compacted soil.usually soil will be compacted in layers in every 300mm depth.the total height of marker depends on the total depth of soil fill. During installation the verticality of pipes are to be checked using plumb off or bubble instrument.the flatness of bottom plate also need to checked Intially the fore sight,back sight and level of the base plate and top of pipe readings were taken.then this will periodically taken as twice or thrice in a week. The readings are periodically noted and the change in the plate and pipe readings are calculated. Settlement marker Checking pipe verticality
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