CV Tomasz Najder Part 5 2010.02.12 2016

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Najder engineering® Movägen 3; SE -133 36 Saltsjöbaden/Sweden

Tel: +46 8 717 5714 Fax: +46 8 717 6042 Mobil: +46 (0)704 217 012

Org. no: 490911-2148 VAT-no: SE490911214801 E-mail: [email protected] http://najder.se/

Stockholm, 12.02.2010 (2016)

Tomasz Najder (Ph.D Civ. Eng.) - Part 5

Personalia Date of birth: 1951-08-30

Address: Movägen 3, SE-133 36 Saltsjöbaden (Sweden)

Tel: 0046 (8) 717 57 14, fax: 0046 (8) 717 60 42, mobile: 0046 (0)704 217 012

E-mail: [email protected]

Legal status: married, 2 children (adults).

Experience Since 07/2005 Najder Engineering

® Stockholm

Senior Consultant within family company.

Activities as Senior Consultant for ISAM KABBANI & PARTNERS FOR CONSTRUCTION AND

MAINTENANCE

12/2008 –11/2009 for the project: UNDERPASS REPAIRS AT INTESECTION OF KING FAHD ROAD AND

PRINCE MOHAMMED BIN FAHD ROAD – DAMMAM (Saudi Arabia)

Client: KINGDOM OF SAUDI ARABIA – MINISTRY OF MUNICIPAL AND RURAL AFFAIRS,

MUNICIPALITY OF DAMAM – DEVELOPMENT AND PROJECTS DIRECTORATE

Tunnel Prime Contractor for concrete repairs: SINOPEC INTERNATIONAL PETROLEUM SERVICE

CORPORATION (China)

Tunnel Sub-contractor for concrete repairs (grouting): ISAM KABBANI & PARTNERS FOR

CONSTRUCTION AND MAINTENANCE (Jeddah – Saudi Arabia)

Work programme:

- The tunnel (underpass) repairs, commenced in April 2009, finished in February 2010.

Scope of work according to:

THE SUB-CONTRACT AGREEMENT

BETWEEN

SINOPEC INTERNATIONAL PETROLEUM SERVICE CORPORATION

(SAUDI BRANCH)

AND

ISAM KABBANI & PARTNERS FOR CONSTRUCTION AND MAINTENANCE

IN REGARDS TO

IMPROVEMENT OF INTERSECTION ALONG KING FAHED DAMMAM ROAD INTERSECTION

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“The Works to be carried out under this Subcontract shall include the following as stated in the Project Specification

(as per enclosed Annexure I), Project Drawings (as per enclosed Annexure II), Bill of Quantities (as per enclosed

Annexure III), and latest version of Sub-Contractor’s technical proposal as submitted to the Contractor and

Consultant, considered complimentary to each other.

1.1. Preparation and submittal of all technical documents describing the Works which include but are not

limited to detailed shop drawings, material technical data sheets, method statements.

1.2. Preparation of a structural inspection plan for the evaluation of the main structure frame of the Underpass.

Inspection shall concern top surface of bottom foundation slab and cold joints between original floor slab

and vertical walls.

1.3. Execution of all inspection works as described in inspection plan.

1.4. Preparation and submittal of inspection findings report and recommendation for further inspection

techniques if needed.

Additional assessment services not included in initial plan shall be considered as supplementary works not

covered by this Sub-Contract and shall require approval from all parties (Contractor, Consultant and

Owner) upon Sub-Contractor’s commercial and technical submittal.

Execution of repair works and remedial waterproofing shall begin after the submittal of inspection findings,

final review of technical details and revised material selection (if revision is needed).

1.5. Execution of repair works and treatment for all expansion joints in walls and raft through:

1.5.1. Injecting curtain grouting material as needed, treating possible anomalies and temporarily stop water

leakage.

1.5.2. Building up a permanent system for treatment of water leakage along with all required accessories

(i.e. sealing tape).

1.5.3. Preparation of expansion joints of walls is not included and is to be carried out by the Contractor

whereby joints must be opened over entire length and cleared of all foreign materials and debris until

a minimum depth of 20-30 cm.

Edges are also to be cleaned by the Contractor by use of high pressure water jet.

1.6. Execution of crack repair works through walls, tie rod holes and at top surface of existing bottom

foundation slab as follows:

1.6.1. All leaking/active cracks shall be injected with appropriate material according to the level of moisture

and crack parameters.

1.6.2. All non-leaking/inactive cracks shall be prepared and filled with plugging cementitious material.

1.6.3. Insertion of vapor phase inhibitor material through walls in order to protect reinforcement bars from

excessive corrosion.

1.7. Treatment of leaks at bottom longitudinal construction joints by installing water bars and post-injection

sealing system.

1.8. Submittal of recommended waterproofing admixture ratios for mix composition for 1 M3 (one cubic meter)

of fresh compacted concrete for Consultant’s approval.

1.9. Supply, place and supervision of waterproofing admixture in new mass concrete at approved rate currently

estimated at 7Kg/M3 for 350Kg of cement per M

3.

Application of envelope system whereby 63% of total concrete mass shall contain aforementioned

admixture ensuring slab protection from all directions and water-tightness.

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1.10. Preparation and waterproofing treatment of floor and wall surfaces through application of cementitious

slurry coating.

1.11. Design, engineering, supply, installation and initialization of a long term monitoring system to be used by

Owner for observing overall structural behavior of the Underpass and detecting any anomalies or failures

for duration no less than two years and not exceeding five years.

Initialization of system and training of Owner’s staffs on system operation.

Providing Owner with continuous technical support during lifetime of system.

Part of aforementioned system shall be installed at the beginning of the Works in order to monitor the

structural behavior of the Underpass during the project”.

Grouting activities:

The short list of grouting activities for repairs:

1. Sealing of transverse expansion joints in the bottom slab.

2. Filling of cavities under the bottom slab in combination with point 1 (optionally).

3. Sealing of construction joints (horizontal and vertical) in the bottom slab.

4. Sealing of expansion joints in the cantilever walls.

5. Sealing of construction joints between new bottom (top) slab and cantilever walls and leaking horizontal

construction joints within cantilever walls.

6. Sealing of vertical cracks in the lower bottom slab and in cantilever walls.

7. Re-grouting of injection hoses (optionally – as completion to points 1, 3, 4, and 5).

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Method Statement - grouting of construction joints:

- This Method Statement concerned the choice of grouting method and materials for grouting to eliminate the water

leakages in the construction joints within concrete bottom slab and cantilever walls.

Method Statement – grouting of expansion joints:


leakages in the expansion joints within concrete bottom slab and cantilever walls.

Method Statement - grouting for sealing cracks:


leakages in the cracks of concrete bottom slab and cantilever walls.

Method Statement - grouting for soil improvement by undersealing:

- This Method Statement concerned the choice of grouting methods and materials for undersealing grouting (grouting

in the soil to increase Relative Density (Dr) (%) in the silty-sandy layer just under the reinforced concrete slab).

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Description of the project:

General cross section

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Measurement and Warning System proposed

Location of piezometers proposed

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Drilling for expansion joints proposed

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Position of swelling bars proposed

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Pictures from the site:

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References:

1. Wassim A. Mahfouz, Product Development Manager,

KABBANI CONSTRUCTION GROUP – Product Development Manager

Tel: 0 +966 (2) 627 8450 (Saudi Arabia)

2. Chadi Y. Said, Bridge Managment System Senior Engineer,

KABBANI CONSTRUCTION GROUP – Infrastructure Managment Solution

Tel: 0 +966 (2) 627 8181 (Saudi Arabia)

3. Tariq A. Klahaf, Bridge Sales & Marketing Manager,

KABBANI CONSTRUCTION GROUP – Industrial Insulation & Cladding Services

Tel: 0 +966 (2) 857 0034 (Saudi Arabia)

Ph.D Civ. Eng. Tomasz Najder

Documents

CV Tomasz Najder Part 5 2010.02.12 2016