Volume 3, Number 14, December 2022 e-ISSN: 2797-6068 and p-ISSN: 2777-0915
VALUE
ENGINEERING FOR DRAINAGE SYSTEM PLANNING ON SOEKARNO HATTA ROAD MALANG CITY=
Yocky Agus Firmanda,
Wateno Oetomo, Esti Wulandari
Universitas 17 Agustus 1945 Surabaya, Indonesia
Email: yockyfirmanda@gmail.com,
wateno@untag-sby.ac.id, wulandariesti@untag-sby.ac.id
|
KEYWORDS va=
lue
engineering, drainage, cost |
ABSTRACT The development of residential areas is very rapid, both in hilly a=
reas
and in "water parking" areas. So that puddles occur in several
places, where in the past it did not occur. Floods/puddles during the rai=
ny
season that occur in the channel area of Jalan Soekarno - Hatta are cause=
d by
the capacity of the existing drainage system being no longer able to
accommodate rainwater runoff. The aim of this research =
is
Determining alternative drainage structure designs that are more efficient
and effective is carried out on Jalan Soekarno - Hatta Malang City using =
the
Value Engineering method and determining cost and time savings after carr=
ying
out Value Engineering in the drainage system planning work on Jalan Soeka=
rno
- Hatta Malang City. The results of this study is After doing Value Engineering by follo=
wing
the work plan (Job Plan) alternative 2 has been obtained which is efficie=
nt
because the cost is cheaper (Rp. 15,881,356.00) than other alternatives, =
and
alternative 2 is more effective because time (23 days) is faster than oth=
er
alternatives . Whereas the initial cost of the U Gutter pair (existing) w=
ork
on the Drainage System Planning project to Overcome Floods on Jalan Soeka=
rno
- Hatta Malang City is Rp. 17,139,144,126.35. While the cost after being =
in
VE, namely alternative 2 Box Culvert Structure, is Rp. 17,014,195,372.72 =
so
that there is a cost savings of Rp. 124,948,753.62 or 0.46% |
INTRODUCTION
Backgro=
und
behind functi=
on
and purpose from Value Engineering is something approach systematic for get
optimal value of every expenditure through a method investigation, expenses
that do not need can omitted, so can produce a repair value and savings, the
approach through a effort directed creative to analysis function where thin=
gs
that add up cost without add function thought for removed (Tjaturono, 2007) .
Malang city is area
experiencing cities very fast development. one growing aspect rapidly ie area settlements, where
throughout corner medium Malang city popping up area new housing. Development area settlement is very rapi=
d,
both in the area hills nor water park area. So that puddles occurred in some
place, where in earlier times no happened. Flood / inundation in season the=
rain
that occurred in the channel area of Jalan Soekarno - Hatta was caused by
capacity system existing drainage no again capable accommodate rainwater ru=
noff.
Besides, there are a number of channel that has
experience sedimentation and channel inlet not enough adequate. puddle happ=
ened
because increasing surface water runoff consequence rain, p this more cause=
d by
more decrease vegetation cover and height intensity rain. Happening change =
in
runoff trend surface, sometimes not accompanied with arrangement system
adequate drainage, or on the contrary change of use land no notice system
existing drainage.
System drainage in
Malang City general there is two type type channel, that is channel open and closed. Especially on
channels drainage closed, partially big already enough old legacy era Dutch
colonialism. the conditions many experience decl=
ine
quality like happening obstruction and no the function of the manhole as a
street inlet. circumstances this is very worrying for residents and users road if occur resultant waterlogging enhancement
intensity bulk rain. reviewed from condition physical city which is plains =
tall
with Genre main form river, then channels in the city of Malang can shared =
into
2 (two) channels drainage macro and drainage micro. Drainage closed, genera=
lly
is Dutch heritage found in the area housing area luxury (Ijen
area) and center city. Drainage open, generally is effort development by the
government city together with Public local, have available evenly on the si=
des
left right road. Besides function as channel rainwater disposal, drainage in
Malang City is also functioned as channel disposal waste domestic (mix drai=
n)
which is no live has cause sedimentation processes caused to happening water
overflow.
Obtained data in the
form of secondary and primary data . the data ob=
tained
from document contract, which contains RAB information (Plan Budget Cost ), drawings, contract period (Schedule), manpower=
work
and source data power equipment On stage design with method engineering type
construction beginning with shape and type / type construct more cheap, stu=
rdy
and efficient as well as engineering planning method implementation. Resear=
ch
results this form manipulation value (Value Engineering) construction
drainage city, for reach efficiency fee on stage design construction and
planning method implementation job.
Drain=
age is
method diversion water flow natural or artificial from surface land or lower
land for an area or area /territory for avoid stagnant water (rainwater / w=
aste
water in a =
the
place or area, that is with method handle excess water before enter to chan=
nel
or river. Whereas system drainage is defined as series functioning waterwor=
ks
for reduce and/ or throw away excess water from something area / land, so a=
rea
/ land the could ena=
bled
optimally. System drainage is part from infrastructure very important urban=
, so
system good drainage could liberate city from puddles of rainwater, so no c=
an
ignored in something planning.
In
instruction technical Regulation of the Minister of Public Works 12/PRT/M/2=
014,
understanding drainage urban is drainage in functioning urban areas manage /
control surface water, so no disturbing and/ or harm society. Whereas System
drainage urban is one unity system technical and non- technical from
infrastructure and facilities drainage urban.
1.
2.
2.1.
2.2.
Stone
used for profession partner must be the originating stone from river or cru=
shed
stone from results shaped stone crusher approach rectangle with quality that
has approved and free from layers and defects other. The stones used must h=
ave
heavy type no not enough of 2.6 tons/m 3,
The structure of the box culvert is made with high quality because the box culvert bears the traffic load that crosses its upper s=
ide
and the wide dimensions of the box culvert are large. This type of Box Culvert is generally made dire=
ctly
on site, starting from the work process of formwork fabrication, assembling
rebar and concreting ( pouring ). Box
culverts are known as culverts consisting of four sides which are refer=
red
to as box culverts. The standard size is usually 3×12 to 12×12 with a range=
of
1 and increments. Owned length is usually 6 to 8 meters.
Concrete precast must have something strong supple and
strong press minimum characteristics match with SNI 1972 concerning Method =
of
concrete slump test, SNI 1974 concerning Method of strength test press conc=
rete
with printed cylinder test object and SNI 4431 concerning Method of strength
test flexible.
Profile - pro concrete precast the consider weight, leng=
th
and width for the transport. Connection between profile the must minim=
ize
from leak.
Structure ferrocement is something type Wall
concrete thin bone (3.00) cm, which was made of hydraulic cement mortar, wi=
th
ratio mix 1 cement: (2-3) sand, given reinforcement (≤ 6.0 mm) with l=
ayer
wire woven (wiremesh) size ≤1.0 mm,
continuous and tight. ferrocement is
technology construction alternatives that have used in provision water supp=
ly
and various development channel drainage.
Structure
RESEARCH METHOD
In this research, the research subject is=
the
system dimensions of channel drainage on the Soekarno
The research location is on Soekarno-Hatta
Street, Malang City and its surroundings. elicitation time i
will do it for two mr land animals from previous
research studies, interviews and data collection.
Procedure data collection for a number of alternativ=
e the are :
1. Primary data
2. Secondary Data
Analysis method Analytical Hierarchy Process (AHP)
prop=
osed
Analytic Hierarchy Process (AHP=
). in study this aim for give evalu=
ation
for factor measurable and not measurable influence decision election type
construction channel drainage. Election method based on characteristics iss=
ues
and considerations advantages and disadvantages from method other. Research=
er
evaluate the importance of each criterion according to mark partner compared
criteria.
Pareto analysis
Steps in do analysis of the Law of the Pareto Distribution is:
1.
Collect data about costs and what components are in t=
he
project being reviewed.
2.
Order the total component costs (cost + VAT) from lar=
gest
to smallest.
3.
Add up the cumulative total component costs.
4.
Count
percentage<=
/span> component profession and add up cumulatively.
PKp =3D (Kp/ TKp)x 100%
Description:
PKp: % Component profession
Kp: Component profession
TKp: Total components profession
5. Calculate the percentage of total
component costs and total them cumulatively.
PBKt =3D ( BKt / Bt ) x 100%
Description:
PBKt : % Cost total component of BKt : Cost = total component
Bt = : Total cost
6. Plot of the cumulative percentage of
work components (X axis) and the cumulative percentage of work component co=
sts
(Y axis).
7. Pareto chart (where 20% of work
components will generate 80% of work costs).
After
pareto, made based on identification activity, alternative quantitated
qualitative. Then made in Diagram Activities - activities that are replaced
with alternative based on analysis.
Hierarchical Model Arrangement
Arra=
ngement
of hierarchical models this aim break something complex problem arranged
Becomes something form hierarch=
y.
Something structure hierarchy alone consists from which elements grouped
in levels (levels).
Interest Le= vel Weighting Criteria
weig=
hting level interest criteria
with analysis multi criteria is analysis which worn for determine choice with use method
assessment and weighting to a number of influencing criteria taker decision in make decision.
Determination Order Priority Proposal
Fina=
l step
of the determination process priority on method new this is determination order priority for proposal planning
construction channel drainage.
Evaluation Results Ratio Order Priority Proposal
Next step is do evaluation ratio=
Among order priority
the. From results
ratio the expected
later could is known
advantages and lack on second results
order priority proposal
the so that could pulled con=
clusion and suggestions from study this
RESULTS AND DISCUSSION
Stage
Information
As
for information project data obtained as following:
a.
Project Name:
JI Primary Rehabilitation DED Sengkaling Kiri M=
alang
City.
b.
Research Location:
Soekarno Hatta Street, District Lo=
wokwaru , Malang City. (Got seen in figure 4)
c.
Owner Project : Department of Employment General Source Provincial Water
Resources East Java.
d.
Consultant Planner : CV. Create Yasa .
e.
Estimation Cost Project : Soekarno Hatta Road Channel:
Rp. 16,000,000,000 (
incl VAT 11%). Length =3D 1076 m
Figure
2
Research
Locations
Table 1
Recapitulation Plan Budget
Cost and Weight Profession
Channel Soekarno-Hatta Road
Drainage
Source :=
CV. Create Yes
From table 1 with analysis Breakdown can identified the job t=
o be
done Value Engineering (Value Engin=
eering),
ie profession land, =
work
pedestrian and street floors, work Profession channels and pairs, ie of 92.22% in drainage Soekarno-Hatta road. For look
potential work items to be VE, cost of work items the compared to with over=
all
total cost project. For more he explained could seen
in Table 2.
Table
2
Earthworks
Breakdown, Occupation Floors and Pedestrians, Jobs Soekarno Hatta Street
Channels and Couples
Source:
CV. Create Yes sa Ye=
ar 2022
There are 5 design alternatives as a comparison
to the initial plan of the structure by using:
=
1.<=
span
style=3D'font:7.0pt "Times New Roman"'> Ri=
ver
Stone Pair Structure
=
2.<=
span
style=3D'font:7.0pt "Times New Roman"'> Box Culvert Structure
=
3.<=
span
style=3D'font:7.0pt "Times New Roman"'> Lining Structure Concrete Precast
=
4.<=
span
style=3D'font:7.0pt "Times New Roman"'> St=
ructure ferrocement
=
5.<=
span
style=3D'font:7.0pt "Times New Roman"'> St=
ructure
RCP culvert
At this stage what is important is the analysis of in= put ideas or alternatives. Bad ideas will be eliminated. Alternatives or ideas = that arise are formulated and considered for their advantages and disadvantages which are viewed from various angles and then a ranking or assessment is ma= de. In this evaluation the Zero One method and the Evaluation Matrix are used.<= o:p>
Profit and =
Loss Analysis
analysis is the most
crude screening stage among the valuation methods used in the valuat=
ion
stage.
Table 3
Profit and Loss Analysis
|
No |
selected idea |
Potential Profit |
Potential Losses |
|
1 |
Structure Stone Couple |
- <=
/span>Strong withhold current, hold slide - <=
/span>Easy formed and worked on - <=
/span>Cost cheap |
- <=
/span>Less durable and long lasting - <=
/span>Long working process - <=
/span>Need maintenance routine |
|
2 |
Box Culvert Structure |
- <=
/span>Strong withhold current, hold slide - <=
/span>Durable and long lasting - <=
/span>Easy and fast in installation - <=
/span>Construction safe |
- <=
/span>Mobilization difficult need large place _=
- <=
/span>Cost is expensive - <=
/span>Only dimensions certain |
|
3 |
Concrete Lining Structure Precast |
- <=
/span>Strong withhold current, hold slide - <=
/span>Durable and long lasting -&=
nbsp;
Easy =
in
installation |
- <=
/span>Construction limited in height - <=
/span>Need addition lock or other ingredients f=
or
lining installation |
|
4 |
Structure ferrocement |
- <=
/span>Could formed on site profession - <=
/span>Dimensions could adapt |
- =
Long in installation |
|
5 |
Structure RCP
culvert |
- <=
/span>Strong withhold current, hold slide - <=
/span>Durable and long lasting - <=
/span>Easy and fast in installation -&=
nbsp;
Const=
ruction
safe |
- <=
/span>Mobilization difficult need large place _=
- <=
/span>Cost is expensive -&=
nbsp;
Only
dimensions certain |
Source: Analysis Results year 2=
022
=
Determining Alternative
Ratings
Aspects to be considered are:
1.
Technical aspects (safe-hazardous safety against sliding and carrying
capacity)
2.
Aspects of implementation costs (low cost of construction and operation=
and
maintenance)
3.
Aspect Time of execution of work (fast execution of work)
4.
Aspects of material availability (easy to difficult availability of
materials on location)
5.
Aspects of the use of human power (more or less needed)
6.
Aspects of the implementation method =
(difficulty-simple implementation method)
Pareto <=
/b>analysis
For Pareto analysis every alternative could=
seen in the picture following this:
Table 4
Pareto Analysis Alternative 1 (River Stone Structure)
Source : Calculation Analysis Results year 2022
=
Figure 3
Alternative Pareto Chart 1
Source : Calculation analysis results year 2022
Table 5
Pareto Analysis Alternative 2 ( Structure Box Culvert )
Source : Calculation Analysis Results year 2022
Figure 4
Alternative Pareto Chart 2
Source: Calculation analysis results year 2022
Table 6
Pareto Analysis Alternative 3 (Concrete Lining Structure Prepri=
nted)
Source : Calculation Analysis Results year 2022
Figure 5
Alternative Pareto Chart 3
Source: Calculation analysis results year 2022
Table 7
Pareto Analysis Alternative 4 (Structure ferrocement)
Source: Calculation Analysis Results year 2022
Figure 6
Alternative Pareto Chart 4
=
Source:
Calculation analysis results year 2022
Table 8
Source : Calculation Analysis Results year 2022
Figure 7
Alternative Pareto Chart 5
=
Source:
Calculation analysis results year 2022
Analysis of Time, Energy and Cost Requirements
From the results Pa=
reto
analysis above, obtained work items each the biggest and most different
alternative. Thus, work items the<=
/span>
could analyzed need time, effort and cost. So that from analysis the gotcal alternative elected. Needs analysis time, effo=
rt and
cost each alternative could seen in the table
following this:
Table 9
Analysis of Time, Energy and Cost Requirements Alternative 1 (S=
tructure
River Stone Pair)
Source : Calculation analys=
is results
year 2022
Table 10
Analysis of Time, Energy and Cost Requireme=
nts
Alternative 2 (Structure Box Culver=
t)
Source: Calculation analysis results year 2=
022
Table 11
Analysis of Time, Energy and Cost Requireme=
nts
Alternative 3 (Concrete Lining Structure Preprinted)
Source : Calculation analys=
is results
year 2022
Table 12
Analysis of Time, Energy and Cost Requirements Alternative 4 (S=
tructure
ferrocement)
Source : Calculation analys=
is results
year 2022
Table 13
Analysis of Time, Energy and Cost Requirements Alternative 5 (S=
tructure
RCP Culvert)
Source: Calculation analysis results year 2=
022
Value Engineering <=
/span>Analysis
As for the comparis=
on
cost design initial (Existing) with design Value
Engineering for profession channel drainage structure stone masonry,
structure box culvert, concrete
lining structure precast, structure ferrocement,
structure RCP culverts after being counted Present
Value (Future Price) could =
seen in table 14. below this.
Table 14
Ratio Cost Initial work and after in VE
Source
:
Calculation analysis results
Feasibility Level Analysis
Here will counted mark Present Value his for 5 alternatives
Table 15
Calculation Present Val=
ue (PV) Alternative 1 Structure Stone Couple
Source : Calculation analysis results
Table 16
Source : Calculation analysis results
Table 1 Calculation
Present Value (PV) =
Alternative 3 Structure Concrete
Lining Precast
Source : Calculation analysis results
Table 18
Calculation Present
Value (PV) Alternative
4 Structure ferrocement
Source
:
Calculation analysis results
Table 1 Calculation
Present Value (PV) =
Alternative 5 RCP Culvert Pipe Structure
Source =
: Calculation analysis results
Table
20
Source: Calculation analysis results
Table 2 1
Amount savings Present Value (PV) Between Existing and Alternative
Source
:
Calculation analysis results
From Table 21, then alternative selected is
alternative 2. With Savings: Rp. 17,014,195,372.72 – Rp. 15,875,259,746.36 =
=3D
Rp. 1,244,545,149.76. Or save 4.63% .
Table 22
Total Value Engineering Analysis Results
Sourc=
e : Calculation analysis results
From Table 22 of results analysis
, then alternative selected is alternative 2
CONCLUSION
Has been obtained efficient alternative 2 because cost morecheap (Rp. 15,881,356.00) from alternative other,=
and
alternative 2 more effective because time (120 Days) m=
orefast
from alternative other.
Cost once in VE ie
Alternative 2 The Box Culvert structure is Rp. 17,014,195,372.72 up there is
savings cost Rp. 124,948,753.62 or 0.46%.
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Copy=
right
holders:
Yocky<=
/b> Agus<=
/span>
Firmanda, Wateno
First publication right:
Devotion - Journal of Research and Community Service
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