Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

STON COLUMN METHOD STATEMENT TO SUPPORT THE MATRAH FISH MARKET FOUNDATIONS . THE CONSULTANT: SNOHETTA OVERSEASE ARCHITECTUREAL AS THE MAIN CONTRACTOR: OMAN SHAPOORJI. THE PILING CONTRACTOR: TMF EURO FOUNDATIONS.

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

STON COLUMN CONSTRUCTION METHOD STATEMENT

PROJECT :MATRAH FISH MARKET CLIENT :MUSCAT MUNICIPALITY CONSULTANT :SNOHETTA OVERSEASE ARCHITECTUREAL AS PILING CONTRACTOR :T.M.F EURO FOUNDATIONS (L.L.C)

Rev. Sub. Date: Amendment Details Prepared By Approved By

0 14 MARCH

2012 REEM M. AMA

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

1.0 GENERAL:

1.1 Introduction

This method statement is given as a general guidance for conducting the works

and their sequence. However, during their execution, variations may be adopted to

suit unforeseen conditions, within the framework of the Specifications, and in

accordance with the Engineer’s directions.

1.2 Scope of Works

This method statement outlines the procedures for construction of Stone Columns

using Rammed Aggregate Pier to enhance the soil shear strength and bearing

capacity. By introducing the rammed pier will increase the composite strength and

stuffiness of the compressible soil. The piers exhibit a high angle of internal friction

that increase the shearing resistance to control the stability of the structure.

The Impact System uses vertical displacement Rammed Aggregate Piers (RAPs) to reinforce good to poor soils, including loose sands, silts, mixed soil layers, uncontrolled fill and soils below the ground water table.

Scope of the work for TMF comprises the following:

1.2.1 Execution of the stone columns as per the designed approved Drawings and as

per project particular Specifications and standards.

1.2.2 Conducting four number of Plate Load tests.

1.2.3 Conducting Single Zone Load Test.

Separate method statements for items 1.2.2 &1.2.3 will be submitted upon

identifying the test location by the Engineer

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

2.0 SITE PREPARATION:

2.1 Location and Protection of Existing Services

The underground or overhead services, if any in close proximity to the stone

columns locations with minimum distance of 5 m will be located and exposed by

hand excavation, and protected by Main Contractor Before commencing stone

column works, Main Contractor should ensure that, clear space minimum 5 m and

accesses are available for the movement of the Rammer rig / plant at all stone

columns locations.

2.2 Site Installation:

Site installations will be established in the allocated area. The allocated area will be

maintained in a dry neat and orderly condition.

2.3 Survey Works:

The provision of main grid lines & Bench marks at all stone columns location shall

be made by the Main Contractor

2.4 Rammed Aggregate Pier installation Sequence:

TMF will provide Main Contractor with a daily sequence for the stone column

installation sequence during the next day,

The installation will start from the inner column to the outer one, to ensure the whole

designated area compacted and the columns reach to the desired level, or the

ground reach to the refusal i.e. the ground is properly compacted for which the soil

bearing capacity, shear strength, and the settlement have been improved

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

2.5 Stone grading:

Well graded aggregate will be delivered to the site as per the design approved by

the Engineer.

3.0 Construction of The Rammed Aggregate Pier :

The unique installation process displaces soil during installation and utilizes vertical impact ramming energy to construct vertical displacement RAPs, which exhibit unsurpassed strength and stiffness. The installation procedure produces lateral compaction and pre-stressing and pre-straining of the surrounding matrix soil. RAP solutions are designed to provide total and differential settlement control and increase bearing support to meet project requirements.

The Impact System Method

3.1 The cavity is created to full designed depth by pushing a specially designed mandrel and tamper foot using a relatively large static force augmented by dynamic impact energy. Tamper nominal foot diameters as per the design piers diameters and design depth measured from the bench mark level or the ground refuse level , depending on design requirements. This method eliminates spoils as all penetrated soils are displaced laterally. The bottom flappers prevents soil from entering to the hollow stem pipe 3.2 After driving to design depth, the hollow mandrel serves as a conduit for the placement of aggregate. The aggregate is placed inside the mandrel and the mandrel is lifted, the bottom of the pier. The tamper foot is lifted approximately 1 meter and then driven back down 0.7 meter, forming a 0.3 meter thick compacted lift. The compaction is achieved through static force and dynamic impact energy from the hammer. The Impact hammer densifay the aggregate vertically and the foot forces aggregate laterally into cavity sidewalls. This results in excellent coupling with surrounding soils and reliable settlement control and superior strength and stiffness.

Following installation, vertical displacement RAPs support shallow foundations, The footing stresses are attracted to the stiff RAPs, resulting in engineered settlement control.

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

3.3 Advantage of the Rammed Aggregate Pier: Because the compaction process is vertical with horizontal displacement, the

reinforcement does not produce a “mudded zone”. Sidewall pre-stressing and pre-straining pre-mobilizes the lateral deflections that

occur as the pier bulges. Direct ramming action provides much higher friction angles that result in higher

strength and stiffness. The piers have a consistent diameter due to the regular construction sequence of

pulling and pushing.

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

4.0 Rammed Aggregate Pier Records:

The following records will be submitted to the Engineer at the end of the working day

1. The pier number.

2. The penetrated depth.

3. Any other conditions or instructions issued by the Engineer.

5.00 SITE CLEANLINESS:

Care will be taken to keep the site in good condition. Any remaining aggregate for the

operation will be removed from the site by the main contractor

6.0 EQUIPMENT & TOOLS:

Impact RAP construction equipment

To perform the Rammed Aggregate Pier, the following equipment will be available at the

site:

- ABI Piling Rig.

- JCB or Wheel Loader

Dubai: Sharjah: Egypt: Oman: P. O. Box 83834 P. O. Box 95177 P192 Ismailia, Egypt P. O. Box 211 Ruwi Tel.: .+971 4 298 0942 Tel. : +971 6 535 3390 Tel.: +20 64 391 3343 P.C. 112 Muscat, Oman Fax: +971 4 298 0953 Fax : +971 6 535 3391 Fax : +20 64 391 3344 Tel. : +968 2 458 2556 E-mail: ama@tmfeuro.ae E-mail : info@tmfeuro.ae Fax : +968 2 458 2560

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7.0 WORKING HOURS

The site working hours will be from 07:00 to 19:00 daily, Fridays excluded. One hour rest

will be given for lunch each day.

If required, extended working hours will be with prior approval from the Project Manager.

8.00 SAFETY

TMF will comply with all the safety requirements of the contract and the internal (TMF)

safety manual including the requirements on training of the project. Lifting devices such as

Shackles etc. will be properly inspected and certified before use. All lifting equipment will

bear the correct safety color codes.

All persons will wear proper personal protective equipment (PPE), i.e., ear protection,

safety helmets, safety glasses, safety shoes, hand gloves, etc. PPE will be of approved

type.

The company has over 25 year of experience in the Middle East covering all range of works related to: Piling works (CFA System, Bentonite bored Piles and Driving of Precast concrete Piles) Piles