Embankment Construktion Metod.pdf

8/18/2019 Embankment Construktion Metod.pdf

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Spirit of Innovation

Location of the selected embankment work

is in stopway, runway, and shoulder runway

STA 0+090 to STA 2+410. The work also will

back fill the location in runway that has

been excavated in previous work. We do this

because in new design the elevation of

proposed design is higher than the previousone.

STA 2+410STA 0+090

Note:

Start of Work

Finish of Work

Direction of Work

Work Area

• Stopway

Length : 120 m

Width : 60 m

• Runway

Length : 2200

Width : 45 m

Width (turning pad) : 47.5 m

• Shoulder Runway

Length : 2214.76 m

Width : 7.5 m

Total Area : 152125 m2

MaterialEmbankment : Selected Sandy Gravel From

Tono River

Flowchart illustration

CONTINUE TO NEXT LAYER

SELECTED EMBANKMENT

(LAYER1)

START

FINISH

Q

LAND CLEARING

Yes

Yes

No

No

SUBGRADE COMPACTION

COMPACTION (LAYER 1)

Q

LAND GRUBBING / STRIPPING

SITE MANAGEMENT AND WORK AREA


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Technical Specification

• Before Embankment Construction the surface of the ground shall be

graded and compacted to achieve 90% of maximum dry density to a

depth of 200 mm below resulting ground.

• The Fill is compacted to a minimum of 95% of maximum dry density.

The area will be divided into 18 lanes. The width of each lane 2.5 meter. It refers to

the spesification and also the equipment ability. For compaction, we’ll use two

vibro rollers. One vibro start from the left side to centerline. And other start from

centerline to the right side. If later on the equipments added for acceleration, the

method will be adjusted in the field.

The material will be spread 100 meters in advance of rolling. Number of passes is

10 passes. It get from trial that has been done before.

SEQUENCE

Note:

Start of Work

Finish of Work

Direction of Work

18 Lanes

Equipment lanes and passes


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The area will be filled by Selected sandy gravel from tono river. Backfill will be

divided into several layers (number of layers depend on the depth). Backfilling will

be done under runway and shoulder pavement. Start from subgrade which has

been compacted until reach the elevation bottom base course.

The thickness of each layer 20 cm in compacted condition and maximum 25 cm in

loose depth. The test will be done in each layer. If the requirements are met, then

the work continue to the next layer.

In the layer width will be made a longer span than the upper layer (see the picture

above) to avoid the landslide and to tie the layer with embankment in stripway

that will be done later on.

SEQUENCE

Compacted Subgrade

8% CBR

Selected Sandy

Gravel 35% CBR

Bottom Base

Layer @20 cm

Total Layer


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1 Preparation

The contractor prepare the equipments and access of the equipments to

the site. Then the surveyor will measure and install the location of boundary

markers clearing based on drawing.

LAND CLEARING

Clearing work

Start

Finish

Preparation

Transport material to

disposal area

Q

No

Yes

Equipments

• Bulldozer : 1 unit

• Excavator : 1 unit

• Dump Truck : 4 unit

Resources

• Operator : 2

• Driver : 4

• Surveyor : 1

• Asisstant Surveyor : 1

• Helper : 2

• Supervisor : 1

• Safety Officer : 1

Productivity : 800m3/hour

METHOD


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2 Land Clearing

3 Transport to disposal area

The material rubbish of cleaning result will be dumped to the disposal area

that have been approved using dump truck and excavator to take material

into dump truck.

Excavator

Clearing the bushes and other material that are not needed anymore using

bulldozer. The material will be stacked in some spots to ease the excavator loadthem to the dump truck.

LAND CLEARING

METHOD


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1 Preparation

The contractor prepare the equipments and access of the equipments to

the site. Then the surveyor will measure and install the location of boundary

markers grubbing/ stripping based on drawing.

LAND GRUBBING/STRIPPING


Start

Preparation

Yes

Q No

Finish

No

Yes

Removal Grubbing

material and stripping

top soil

Transport to dump area

Q

Equipments

• Bulldozer : 1 unit

• Excavator : 1 unit


Resources

• Operator : 2

• Driver : 4

• Surveyor : 1


• Helper : 2

• Supervisor : 1


METHOD



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2) Removing existing bushes, undergrowth, etc and stripping top soil.

Stumps exposed or buried logs, bushes, undergrowth, etc will be

grubbed up by bulldozer. Then stripping the top soil to prevent

contamination and subsequent mixing of the the selected embankment

materials with organic soils.

.

3 Transport to disposal area

The material rubbish of cleaning result will be dumped to the disposal

area that have been approved using dump truck and excavator to take

material into dump truck.Excavator

LAND GRUBBING/STRIPPING

METHOD


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METHOD

Start

Preparation

Yes

Finish

Spreading

Compacting

Q

No

Yes


SUBGRADE COMPACTION

Equipments

• Motor Grader : 1 unit

• Vibro Roller : 1 unit

• Water tank : 2 unit

1 Preparation

The contractor prepare the equipment and access of the equipment to the

work site. Then the surveyor put up stakes and elevation plans of the

subgrade.

Resources

• Operator : 2

• Driver : 2

• Surveyor : 1


• Helper : 2

• Supervisor : 1




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Final compaction by vibro roller and also by spraying water to the

compaction area surface. After that, the subgrade density field tested and

witnessed by consultant.

3) Compacting

To obtain the elevation plan subgrade surface using a motor grader. The

Ground is spreaded and levelled by motorgrader. Then doing initial

compaction using vibro roller followed by watering to the surface using

water tank until reach the optimum water content.

2) Spreading

METHOD

SUBGRADE COMPACTION


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1) Back Filling

The material is selected Sandy Gravel from tono river. The dump truck bring

the material from stock pile and place it to the location.

SELECTED EMBANKMENT

Start

Preparation

Backfilling

Finish

Spreading

Compacting

Q

No

Yes

Equipments

• Motor Grader : 1 unit

• Vibro Roller : 2 unit


• Water Tank : 2 unit

METHOD

Resources

• Operator : 3

• Driver : 6

• Surveyor : 1


• Helper : 2

• Supervisor : 1




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2) Spreading

3) Compacting

To obtain the elevation plan of selected embankment using a motorgrader. The material will be spreaded and levelled by motor grader until

we get the thickness plan of layer in loose soil. As mentioned in

spesification, The materials shall be laid in layers not greater than 250 mm

loose depth. But it may be changed by considering of compaction trials

result.

Compacting the layer with vibro roller with a several passes (number of

passes depend on the trial test) then followed by watering with a water

tank. After compaction work, the surveyor will check the thickness of layer.

The layer density field tested and witnessed by consultant. If it takes the

requirement, the work continue to back fill the next layer.

SELECTED EMBANKMENT

METHOD


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TRIAL TEST

Before embankment throughout the area, we do trial test for compaction

work. The purpose of the trials is to optimise the method of working to

achieve the compaction requirement. Material of selected sandy gravelfrom tono river shall be placed in a loose layer not greater than 250 mm

in thickness.

The area 45 m wide is divided into 4 zones. We name them as Zone A, B,

C, and D. Each zone having a different number of passes.

A

B

C

D

8 Passes

10 Passes

12 Passes

14 Passes

Requirement

• Field CBR : minimum 35%

• Laboratory CBR : minimum 35%

• Dry Density : Minimum of 95% of maximum dry density

Method

Result

From trial test that has been done, we get the minimum passes that meet the

requirement is 10 passes.


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1. Each personnel using general safety equipment's (mask,

glasses, safety boot, gloves, etc.)2. Provide flagman to control traffic circulation

3. Provide warning sign

4. Provide working border area

5. Periodic safety patrol control

6. Tool box meeting before and after work

7. Provide safety officer

Standart safety equipments :

SAFETY AND ENVIRONMENT

Documents

Embankment Construktion Metod.pdf