method statement - brantas...

Dredging and Embankment of River

DETAIL CONSTRUCTION OF WORKS ITEMS

METHOD STATEMENT Project Name : Dredging and Embankment of Ciliwung-Gunung Sahari Drain & Waduk Melati

Sub-Project Province : DKI Jakarta Bidder Name : PT. BRANTAS ABIPRAYA (Persero)


1. Location;

Construction on 2 Site , Waduk Melati, Cideng Drain, Gresik Drain and Gunung Sahari Drain

Dredging Works - Dredging and Disposal

- Excavated garbage

Assumption:

Works

- Preparation of Shop Drawing till get approval from Engineer

- Preparation of Equipments work and man power / Labors

2. Measurement

3. Excavation

Excavation must be done according to height line, grade, slope and elevation which is shown in

Drawing.

CONSTRUCTION METHOD FOR DREDGING WORK - Construction;

Sequences : 1. Preparation Work, include :

Equipments : 1. Excavator

2. Pontoon

3. Floating Barge

4. Dump truck

5. Tools

Before excavation started, must be done work of Measurement to know elevation and boundary plan of excavation.

1. Work by heavy equipment ( mechanically), Labors and Tools

2. Work location :Gunung Sahari Drain and Waduk Melati as according to the Drawing and BQ

Description This work have to include all excavation in the line, grade, slope and elevation shown on the Drawing,

boundary, removal, transportation, dumping and Spreading and grading in disposal area.

At construction process, if Any damage to existing structure or facilities that is caused by Contractor’s

operational, contractor will be repaired to the pre-project condition at the contractor’s expense

All Construction will be execute as according to determined Technical specification in tender document


FLOW CHART of DREDGING WORK

START

Determined Access Road into Work Site

Determined & Measurement of work site

Mobilization of Equipments & Personal

Excavation of river’s sediment / waduk’s sediment by Excavator

on Pontoon & Temporary Disposal

Cek

Ok

No

Handling The material by Dump truck

Delivery and transport into Determined Disposal Area

Dumping in disposal area

FINISH

“If determined”

Spreading & Grading by Buldozer

Cek

Ok

No

FINISH

Separation the Garbage




FINISH


Dredging, Sheet Pile & Capping Beam FOR waduk melati

- Work Location

Construction;

- All Construction Will be constructed from Up Stream up to Down stream

- At first, Common excavation will construction - Continue by Sheet Pile Construction

Dredging

Sheet Pile Construction

Work Direction


Dredging

1. Temporary Disposal

Work Direction

Temporary Disposal for Red Area

Using Drain Existing

Temporary Disposal for Yellow Area using Container


Dredging for Red Area

Separation Garbage - Use separator /screen to separate large size solid waste

- Use Labor, floating pontoon ship and Tool or - Use Labor and tools in temporary disposal. For some location, Work by Excavator Usually for this

method for floating Garbage

Handling Excavated material into Temporary Disposal

Excavated Material

Temporary Disposal

Handling Location

Traffic Handling to disposal area

Garbage

Excavated Material


- Movable Floating barges by Tug boart

Access Road;

- Problem 1. Existing Access Road already Owner by Third party.

- Solution 1. Contractor will coordination to using that road from the owner.

2. Mediator by Project owner if needed

3. Any damage to existing structure & existing road or facilities that is caused by Contractor’s operational, contractor will be repaired to the pre-project condition at the contractor’s expense

(even more better) 4. Handling and hauling of material excavated and garbage at mind night from 22.00 wib up to

05.00 wib

Routes for Dredged Material ;

- Jl. Kebon Kacang

- Jl. MH. Thamrin - Jl. Merdeka Barat

- Jl. Majapahit - Jl. Juanda

- Jl. Ciliwung Gunung Sahari

Existing Road Owner by third party


Handling and Hauling into disposal area

- Excavated Material will be transported into disposal, Spreader and grading. Handling Material, Truck’s

Dump must be equipped by Water Seal during transportation process, so that no debris of Excavated

material on access road.

- Traffic management with traffic lights that have been there (intersection lights) and will be assisted with traffic management by contractor

- Contractor will request and permissions using Ancol’s land to using access road for disposal of

excavated material determined to the tender document

- For Garbage, Disposal as determined to the tender document or otherwise determined by Director Bantar Gebang

Illustration

Spreading excavated material on disposal area


Dredging for Yelow Area

- Excavated material will be used Container

- Temporary Placed Container on Left Side ( West Side) of Melati basin - Separated Garbage by man and tool on temporary Disposal (Container)

- Use separator /screen to separate large size solid waste - Use Labor and tools in temporary disposal. For some location, Work by Excavator Usually for this


- Container is Steel Plate and Profil L - Work is 24 hour

- Movable Floating barges by tug boat

1.2 m

1.2 m

2.4 m


Handling

- Separated Garbage by man and tool on

temporary Disposal (Container)

Hauling to disposal area

- Work is 22.00 wib up to 05.00 wib

- Access Road; Problem

1. Some of Existing Access Road already Owner by Third party. There is Border by Fence

Solution

1. Contractor will coordination to using that road from

the owner. 2. Mediator by Project owner if needed

3. Any damage to existing structure & existing road or facilities that is caused by Contractor’s operational,

contractor will be repaired to the pre-project condition

at the contractor’s expense (even more better) 4. Handling and hauling of material excavated and

garbage at mind night from 22.00 wib up to 05.00 wib

Existing Road Owner by third party


Design Container Unit that open in Side system based from Drag Line Method.


Type, capacity, Labor and Material

Description : Dredging and disposal Item no 301

1) Labour 3) Production / m3 8 hour /day 4) Equipments

- Foreman = 1 = 21.00 m3 /hour - Excavator Long Arm = 3 Unit

- Skill Labor = = 168 m3 /day - Pontoon = 3 Unit

- Labor = 3 - Floating Barge = 10 Unit

- Steel Container = 50 Unit

2) Material - Tug Boat = 3 Unit

- Non - Service Crane 15-25 ton = 3 Unit

- Dump Truck 16t = 7 Unit

Schedule = As according to " Construction Schedule" that one of attacments in Tender Bid Document


Dredging, Sheet Pile & Capping Beam FOR GUNUNG SAHARI DRAIN

Construction Plan

Stage 1

- All construction will be start from Up stream (Hulu) up to down stream (Hilir) - Construction for Dredging Will be constructed Form End Project (STA. 5+100)

- Construction for Sheet Pile Will be constructed Form Jl. Mangga Besar (STA. 2+450) up to STA. 0+000)

- Construction Will be Fontal (at same time)

Sheet Pile 4.832 m

Dredging 5.100m


EXISTING

WEST SIDE EAST SIDE

Site Visit on West Side River; - At many place, Existing link Road for parking vehicle - Almost for Business Area and residents - Many Building - Difficult for hauling - Many Electric Cable - On same place, that side of river, there is Existing

Building as semi permanent and permanent - High Social cost - Possible for Contractor’s Office

Site Visit on East Side River; - Existing structure are 2 kind of them, there are 3 m

and 5 m - Existing is Pedestrian road (Trotoar) and Planting - Some building as Gazebo - For Hauling can be reach from Existing Road - There are re-condition for temporary disposal after

construction


Routes for Dredged Material ;

- Jl. Pos / Dr Sutomo

- Jl. Ciliwung Gunung Sahari - Jl. RE. Martadinata

- Jl. Pelabuhan Ratu 1 - Jl. Raya Ancol Baru

Dredging

Type 1 1. Excavation & Hauling

- Work at 22 – 05.wib

- Movable Floating barges by winch Separation Garbage

- Use separator /screen to separate large size solid waste - Use Labor, floating pontoon ship and Tool or - Use Labor and tools in temporary disposal. For some location, Work by Excavator Usually for

this method for floating Garbage

Type From Floating barge min 20 m³ directly into Dump Truck by Mobile Excavator

- Work can be happen, if Dredged material in temporary disposal has been finished loaded, and Construction of Dredging still continue.

1. Excavation

2. Hauling and Handling

Excavation Lumpur

Temporary Place Loading Into Disposal Area Dumping

Side of River


Side View

Top View

Side View

Top View

Type 2

Loading to temporary placed

- Excavator on Pontoon for

excavation

- Excavated material disposed on temporary

disposed on Temporary

Disposal by Floating Barge (Oil drum and

Woo)

- Other Excavator loading excavated material into

dump truck

- Dump truck delivery of

excavated material into determined disposal area


1. Excavation

this method for floating Garbage

Labor and tools

- 24 work Hour

- Movable Floating barges and Temporary Floating Barges from Oil Drum by winch

Separation Garbage

- Use separator /screen to separate large size of solid waste

- Use Labor, floating pontoon ship and Tool or

- Use Labor and tools in temporary disposal. For other location, Work by use Excavator Usually for

2. Hauling and Handling - Work hour at 22.00 – 05.00 wib - Garbage separation will be executed on Temporary Disposal and put on temporary garbage box by


- Temporary Floating Disposal by Oil Drum, Wood, Board wood and Plastic to cover of Wood - Movable Floating barges and Temporary Floating Disposal from Oil Drum by winch


Description : Dredging and disposal Item no 201

1) Labour 3) Production / m3 8 hour /day 4) Equipments

- Foreman = 1 = 29.00 m3 /hour - Excavator, 0.8m3 = 2 Unit

- Skill Labor = = 232 m3 /day - Pontoon = 2 Unit

- Labor = 3 - Floating Barge = 18 Unit

- Excavator, 0.8m3 = 1 Unit

2) Material - Dump Truck 16t = 5 Unit

- Non - tools = 1 Ls


Max 50 m

3 m

1.5 m


DREDGING UNDER THE BRIDGES

- Construction From Up stream up to down stream

- Construction in this location will be 2 Stage 1. Blow of Sediment /dredged material under Bridge Using Water Injection. Water Injection take

water from river via Pipe intake and will blow on work site via Pipe Out Put

Water Injection

Up Stream Down Stream

Work Direction

Direction of Moving Sediment Excavator take / excavation of sediment removal (have been blew by Water Injection)

2. The material that moved will be dredged by excavator in other side

3. Movable Floating barges and Temporary Floating Disposal from Oil Drum by

winch


FLOW CHART of DREDGING WORK UNDER BRIDGE

START

Determined Access Road into Work Site

Determined & Measurement of work site

Mobilization of Equipments & Personal




FINISH

“If determined”

Spreading & Grading by Buldozer

Cek

Ok

No

FINISH

Cek

Ok

No

Blow sediment by Water Jet

Excavation by Excavator in other side of bridge

Cek

Ok

No

Separation the Garbage



FINISH



DREDGING ON

- Gresik Drain

- Cideng hulu drain

Assumption - Construction by labor and Tools

- Temporary Disposal by Container

Equipment;

@ Location - Container = 5 Unit

- Dump Truck = 2 Unit for Cideng drain and 1 Unit for Gresik - Mobile Crane = 1 Unit

- Labor

1.2 m

1.2 m

2.4 m

= 20 Person

Container


Illustration

- Garbage separation will be executed on Temporary Disposal and put on temporary garbage box by Labor

and tools


- Labor and Tools

- Placed Dredged material on temporary disposal (river bank)

To loading / bring of dredged material into temporary

disposal

Dredged Material Lansir & Loading


On Location where Loading and estafet by wagon can be executed, Dredeg can be assiten by Temporary

floating (made by bambo and wood)

Hauling at 22.00 up to 05.00 wib

Dumping and spreading on CDF


FLOW CHART OF MANUAL DREDGING WORK

START

Penentuan & Pengukuran Lokasi Pekerjaan

Penentuan Akses ke lokasi Pekerjaan

Pek. Pengerukan Lumpur oleh Pekerja & Alat bantu

Mobilisasi Peralatan & Personil

Temporary placed Ex. Material kerukan di atas Bantara kali

Cek

Ok

No

Loading oleh Pekerja + alat bantu ke gerobak (langsir) & Dari

gerobak ke dalam bak dump truck

Transportasi material ex. Kerukan ke lok. pembuangan / disposal area

Dumping di lokasi pembuangan / disposal area

FINISH

Perapian di damping Area oleh Buldozer & Excavator

FINISH

Cek

Ok

No

“Item ini di bayar tersendiri”


CONSTRUCTION PLAN FOR DAILY STORAGE OF SOLID WASTE (Bigger than 30 x 30 cm) -

method for floating Garbage - Time for Construction are 2 kind of work

1. Construction that can be done for 24 hour Waduk Melati

1.1. Using existing Drain for temporary disposal

1.2. Using Container

Gunung Sahari Drain 1.3. Temporary Disposal

Excavated Material

Handling Excavated material into Temporary Disposal

Use separator /screen to separate large size solid waste

- Use Labor, floating pontoon ship and Tool or

- Use Labor and tools in temporary disposal. For other location, Work by Excavator Usually for this


2. Construction that can be done only on 22.00 up to 05.00 local time

Waduk Melati

2.1. Using existing Drain for temporary disposal

Hauling and dumping into Disposal

2.2. Using Container


Gunung Sahari Drain 2.3. Temporary Disposal


2.4. Directly from Pontoon Barge (assumption top of sediment that contain of garbage already

excavated on day time and separation on temporary disposal)



wib.

- The Contractor will use the existing road for the works. Design Route for Hauling and Handling into CDF

Routes for Dredged Material ; Jl. Kebon Kacang

Jl. MH. Thamrin Jl. Merdeka Barat

Jl. Majapahit

Jl. Juanda Jl. Ciliwung Gunung Sahari

Ancol without retribution cost.

- The garbage to Bantargebang, the bidder must include the retribution cost and follow the cost

regulation of Bantargebang. They can find out the cost per ton or per truck by themselves to

Bantargebang.

- During Handling and Hauling dredged Material into Confined Disposal Facility (CDF) at Ancol Area,

contractor will be prepare of Water tank truck for

cleaning of existing road routes from fall dredged material during transported


- All truck / vehicles transporting the dredged material will be equipped with Global Positioning

System as instructed, for monitoring purpose. All Truck will be Recording.

- Daily report that mention ;

Type of truck License plate number

Time of truck depature from the loading location Time arrival at the deposit area in CDF Ancol

CONTRUCTION PLAN FOR FINAL DISPOSAL - Handling and hauling of material excavated and garbage at midnight from 22.00 wib up to 05.00

- Access to the Site can generally be achieved by the network of public roads and streets in the vicinity of Site.

- The dredged materials shall be properly disposed in the designated Confined Disposal Facility (CDF) at

- The Contractor will be fully inform himself of the conditions of roads, traffic conditions and

traffic regulations with respect to gaining access to the Site for the purposes of performing the

Works and shall take all necessary actions to ensure availability of access to the Site as required.


wib.

- Access to the Site can generally be achieved via the network of public roads and streets in the vicinity of Site.

- The Contractor will use the existing road for the works.

- The Contractor shall fully inform himself of the conditions of roads, traffic conditions and traffic regulations with respect to gaining access to the Site for the purposes of performing the Works and

shall take all necessary actions to ensure availability of access to the Site as required.

- Dredged Material will be transported into disposal, Spreader and grading. Handling Material, Truck’s

Dump must be equipped by Water Seal during transportation process, so that no debris of Excavated

material on access road.

- Traffic management with traffic lights that have been there (intersection lights) and will be assisted

with traffic management by contractor

- Contractor will request and permissions using Ancol’s land to using access road for disposal of excavated material determined to the tender document Confined Disposal Facility (CDF) at

Ancol Area

- Measurement and Payment

Payment for dredging and disposal (garbage excluded)

will be made at the negotiated and approved Contract unit price per m3 defined in the Bill of Quantities,

multiplied by the total m3 of verified and weighted volume (say 35% of the dumped volume plus 65% of the

dredged volume, ratio subject to change). No payment

shall become due to the Contractor for over dredging or excess dredging which exceeds the allowable over depth.


- All truck / vehicles transporting the dredged material will be equipped with Global Positioning

System as instructed, for monitoring purpose. All Truck will be Recording.

- Daily report that mention ;

Type of truck License plate number

Time of truck depature from the loading location

Time arrival at the deposit area in CDF Ancol

HAULING OF DREDGED SEDIMENT TO CDF - Handling and hauling of material excavated and garbage at midnight from 22.00 wib up to 05.00


GARBAGE SEPARATION / REMOVAL/DISPOSAL

Separation; - Use separator /screen to separate large size solid waste

- Use Labor, floating pontoon ship and Tool or - Use Labor and tools in temporary disposal. For some location, Work by Excavator Usually for this


Disposal - The garbage to Bantargebang, the bidder must include the retribution cost and follow the cost

regulation of Bantargebang. They can find out the cost per ton or per truck by themselves to

Bantargebang.

- Garbage Material will be transported into disposal (bantargebang). Handling Material, Truck’s Dump

must be equipped by Water Seal during transportation process, so that no debris of Garbage on access road.

Temporary Disposal for Garbage Temporary Disposal for

Dredge Material


EMBANKMENT WORKS / CONSTRUCTION METHOD FOR CCSP

On Waduk Melati

@ 15 m

On Gunung Sahari

@ 14 m

Description; - Structure Type W 450 B1000 (@ 15m and 14 m) - Work of CCSP is conecction with Revetment work Finished of CCSP will continue with Revetment

Work - Construction;

1. Location;

Construction on 2 Site , Waduk Melati and Gunung Sahari

Waduk melati = @ 15 m

Gunung Sahari = @ 14 m

2. Other

Based of The drawing on Gunung Sahari Site, Work site divide to 2 side of River. West River (left side) and East River (Right side).

Contractor will construction this work by some Group of Works Frontal on Waduk Melati and Gunung Sahari


CONSTRUCTION OF SHEET PILE (ALL LOCATION ON WADUK MELATI / MELATI BASIN)

Refer to Tender Document, Work Stage / Construction Plan will be Constructed as bellowing Drawing

1. Temporary Stock Pile for Sheet Pile

- Based the Work Location, Stock Pile Possible Placed on Side of East of Waduk Melati

- Start Point for Handling Material and Equipment From Upper location as describe at Image bellowed.

From Starting Point, The material will be to site by Pontoon and service Crane - Any damage to existing structure or facilities that is caused by Contractor’s operational, contractor will

be repaired to th pre-project contition at the contractor’s expense (even more better) - Handling the material at mind night from 22.00 wib up to 05.00 wib

Temporary Stock Pile

Plan of Stock Pile

Point for Mob. & Handling Material etc

Plan of Stock Pile


Delivery and handling The Material



2. Stage Construction

Pilling

CUT TOP PILE ( with leveling as according to the drawing)

LEAN CONCRETE



REINFORCING STEEL

FORM WORK (BY MULTIPLEX AND WOOD)

Concreting

- Concreting by Ready mix - Compaction by Concrete

Vibratory - Concreting by Truck mixer on

Ponton


CONCRETING

Concreting of West

Side of Waduk

melati

Directly from Truck Mixer via Gutter

Concreting of East

Side of Waduk melati


FINISH

- Removal Form work

- Installation on next location (side of existing capping beam)

Detail of Capping Beam

Capping Beam - Reinforcing Steel

- Form Work

- Concreting as

according to the drawing and

technical

specification


Finish

Detail Construction Of CCSP Work Assumption:

1. Work by Heavy Equipment (Machinery)

2. Location : As according to the drawing 3. Material CCSP (type as according to the drawing)

Description

1. Site Work Preparation

- Work site made with good level that a Crane can stand up goodly - Crane stand up above plate of form which in the form of steel plate 1,5 x 6 meter or On pontoon in

position that Piling should be on water

2. Stake point of Pilling

- Stake point of pilling of Concrete Corrugated Sheet Pile is executed by surveyor which is approved / agreed by Consultant Supervisor

3. Fabrication of Material sheet pile

- Fabrication / manufacturing of Concrete sheet pile is formed after the drawing has been approved by Consultant supervisor.

- Delivery to work site

4. Pilling

- Excavation by labor to get form of pilling

- Made of guide beam on pilling position using steel material WF type with elevation distance from

sub grade 1 to 2 meter, before pilling is executed

- Guide beam is made with strength enough that can supporting of moment when pilling is executed and stabile

- Piling founded by vertical and monitored with measuring instrument ( Theodolite) and yarn in 2

direction which each other vertical

- Before pilling, pile with Vibro hammer have to in position of sentries

- Concrete Sheet pile is vibrated by Vibro hammer is and the Sheet pile will be pilled into ground

cause of gravitation moment and weight of Sheet pile it selfand also helped by Water Jet Pump

that spraying water, that mean this construction to easyly andalso helped byWaterJetPump thatspraying waterwhichis intendedtosoften of soileasierPilling proccess

- Vibratory is executed as sequence.

- At pilling time, between one of Steel Sheet pile and each other of side (has been pilled) if there is gap, can be near by trek beam.


- Pilling is executed until a Sheet pile reach deepness elevation plan as according to the drawing.

Pengadaan dan Transportasi Material

Sheet Pile



Description : Driving of Corrugated Pre-stressed concrete pile W 450 Item no 342

1) Labour 3) Production / m 8 hour /day 4) Equipments

- Foreman = 1 = 7.00 m /hour - Crane On track 25 ton = 2 Unit

- Skill Labor = = 56 m /day - Vibro Hammer = 2 Unit

- Labor = 3 - Generator Set 50-70 KVA = 2 Unit

- Pontoon = 2 Unit

2) Material - tools = 1 Ls

- Concrete Corrugated Sheet Pile



FLOW CHART OF CCSP

Pilling Process pemancangan

Transportation of Sheet Pile

setting out Of location Pilling

Guide Beam Installation

Placed Sheet Pile on Work Site / stock area

Installation of Sheet Pile on Vibro Hammer (Pilling equipment)

Pilling

Finished Pillingi / Piled Sheet Pile

Check

No

Yes

Delivery of Sheet Material on Trailer

Check

No

Yes

Order & Manufacture By Supplier / Sub Contractor

Equipment Mobilization (Crane with Vibro Hammer)

START

Finished Earth Work

Ok

No

FINISH

Capping Beam


WADUK MELATI PUMP

- Special Construction;

This Waduk melati Pump, for outlet of pump should be cross of Train Rail existing

- Construction Plan Contruction Method for this Point will be used JACKING SLURRY (FULL JACK) method

Umumnya pemasangan pipa jacking diaplikasikan pada kondisi-kondisi lapangan seperti : - Melintang dibawah jalan raya yang padat (jalan tol, jalan kolektor, dll)

- Melintang dibawah jalan rel K.A.

- Saluran dibawah sungai (Syphon) - Pipa dengan installasi yang sangat dalam (lebih dari 5m)

Pelaksanaan Pekerjaan Jacking Pipa 1. Pembuatan Driving / Receiving Pit /

SISTIM PENURAPAN UNTUK TANAH LABIL

TANPA SKALA

DETAIL KONSTRUSI PENDUKUNG GALIANDENGAN TEROWONGAN

TANPA SKALA

UNTUK SEMUA PENYOKONG

TANPA SKALA

SKALA : TANPA SKALA

I

Adalah pekerjaan galian tempat untuk peralatan dan mesin jacking guna mendorong pipa secara

horizontal, konstruksi starting/driving pit berukuran;

Perkuatan dinding pit menggunakan Material sesuai dengan gambar diatas

Disamping itu di dalam driving pit juga dilengkapi dengan block beton untuk dead man, pondasi

mesin, lantai kerja.

2. Pekerjaan Boring & Jacking

Pekerjaan pengeboran tanah dapat dilakukan dengan mesin, akan tetapi memungkinkan juga dilakukan secara manual apabila diameter pipa cukup besar untuk akses pekerja galian dan kondisi

tanah cukup stabil.


Urutan pelaksanaan pekerjaan jacking

2.1. Persiapan Starting Pit & Ariving Pit

Starting/Driving Pit adalah titik dimana Peralatan Mesin dipasang guna mendorong pipa selama pekerjaan jacking dilakukan. Sedangkan titik tujuan dinamakan Arriving Pit/Receiving Pit, yang

digunakan untuk mengangkat kembali mata bor & pilot tube. Secara berturutan dan bila dimungkinkan Arriving Pit akan menjadi Starting pit untuk pekerjaan

jacking section berikutnya.

Pekerjaan persiapan ini antara lain adalah : pembuatan perkuatan dinding galian, pembuatan

deadman untuk menahan thrusting block, pembuatan lantai pondasi untuk guide-rail

Pondasi

Struktu Perkuatan Dinding Tanah

Deadman/ Concrete Trust Wall

STARTING PIT

DRIVING PIT

ARRIVING PIT

RECEIVING PIT

7.0

0

6.00

1.4

0

2.40Dudukan/Pengarah

Jacking Pipe

Concrete Thrust

Wall

Pressure plate

Steel Sleeper

Main Jack Cutter Edge

Arah Jacking

Concrete Pipe

Thrust Ring


2.2. Installasi Mesin Jacking

Setelah pekerjaan Starting Pit & Arriving selesai, mesin jackin mulai dipasang, Tipe Mesin

Jacking yang dipilih perlu disesuaikan dengan ukuran diameter pipa, dan kapasitasnya disesuaikan dengan gaya dorong yang diperlukan.

Pada umumnya peralatan mesin jacking terdiri dari: trusting block / hydraulick jack, guide rails,

steel pressure plate, power pack, steel trusting ring, jacking shield / pilot tube, conveyor belt /

slurry hose, dan control panel untuk operator mesin.

2.3. Pemasangan Pilot Tube / Jacking Shield

Pilot Tube / Jacking Shield adalah berupa silinder baja yang dipasang pada ujung pipa jacking

dimana Mata bor terpasang.

**) untuk ekskavasi tanah dengan cara manual biasanya mata bor diganti dengan

driving collar (steel collar yang didesain khusus untuk menembus tanah).

Guide Rails

STARTING PIT

Steel Thrust Ring

Hydraulic Jack

Steel Pressure Plate

Power Pack

Control Panel

Laser

Pilot Tube

STARTING PIT

ARRIVING PIT

Mata Bor **)


2.4. Pekerjaan pemboran dan jacking awal

Setelah pilot tube dan mata bor terpasang, maka pekerjaan pemboran tanah dimulai dan

setelah pilot tube masuk kedalam tanah, maka pipa pertama dipasang, kemudian pemboran dilakukan secara menerus sementara pipa didorong perlahan

2.5. Pekerjaan pengangkutan tanah

Selanjutnya untuk pipa ke-2, ke-3 dan selanjutnya sampai menuju ke arriving pit. Pekerjaan

pengeboran dan pekerjaan mendorong pipa dilakukan secara berturutan / bersamaan. Pembuangan tanah hasil dari pemboran dibuang melalui conveyor, untuk type mesin lainnya

biasanya untuk diameter kecil, tanah hasil pengeboran dicampur dengan air sehingga berbentuk slurry dan dibuang melalui pipa pembuangan.

Pembuangan tanah untuk cara manual dapat digunakan trolley. Kecepatan pemasangan pipa jacking tergantung pada diameter pipa dan kondisi tanahnya,

umumnya 1 s/d 6 pipa per hari (8 jam kerja).

Pipa -1

ARRIVING PIT STARTING PIT

Steel Collar

STARTING PIT

ARRIVING PIT


2.6. Pekerjaan Jacking tahap akhir

Setelah pipa jacking pertama sampai ke arriving pit, maka pilot tube dan mata bor di angkat,

dan mesin jacking dipindahkan ke section berikutnya.

Stage Construction

STARTING PIT ARRIVING PIT

1 2

1 2

3

4

method statement - brantas...

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