0. Part 00 EE, Extreme engineering. 2010.02.15 - part 1 slide show
CV Tomasz Najder Part 4 2009.06.07 2016
1. sid 1 av 11
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: tomasz.najder@hotmail.com http://najder.se/
Stockholm, 07.06.2009 (2016)
TomaszNajder (Ph.D Civ. Eng.) - Part4
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: tomasz.najder@hotmail.com
Legal status: married, 2 children (adults).
Experience
Since 07/2005 Najder Engineering®
Stockholm
Senior Consultant within family company.
Activities as Senior Consultant for Norconsult SA (Norway)
07/2008 – 04/2009 for GREATER ISTANBUL WATER SUPPLY PROJECT Stage II MELEN SYSTEM.
Client: MINISTRY OF ENERGY AND NATIONAL RESOURCES, GENERAL DIRECTORATE OF STATE
HYDRAULIC WORKS AND WATER SUPPLY AND SEVERAGE
Tunnel Contractor: Moskovskij Metrostroy Açik A.Ş Tȕrkye Ístanbul
Work programme:
- The TBM tunnel with excavation and segment lining, commenced in February 2008, finished in May 2009.
Project description:
- The TBM tunnel with HERRENKNECHT Earth Pressure Balance Type TBM (shield 6.120 mm diameter):
Total length 3.300m, including ca. 1.500m marine crossing section.
The first tunnel in the world between two continents.
The Bosphorus Tunnel is to provide the connection between Asia and Europe across the Bosphorus channel enabling
the water from the Melen River to be transferred to Istanbul. The tunnel is approximately 5.6 km in length and is
located ca. 15 km to the north of Istanbul.
The Asian section is constructed by drill&blast, roadheader and other mechanical methods.
The European incline and underwater sections are to be excavated by a fully shielded closed (or open) mode TBM.
TBM tunnel is rising (looking from Asian site) at a nominal 0.184% minimum gradient under the Bosphorus Channel.
The tunnel rises at a gradient of approximately 7.439% towards the European side.
The early average temperature is +13.6 °C. The average lowest soil temperature at the ground surface is +9.1 °C.
5. sid 5 av 11
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: tomasz.najder@hotmail.com http://najder.se/
Grouting activities:
Annulus grouting behind the lining with multi-component mortar (cement, water, fly ash, sand and
additives). Low pressure back filling.
Annulus grouting means the initial grouting to fill the void between a precast concrete segmental lining and
the surrounding rock.
Proof grouting performed after annulus grouting in the case of voids discovered behind tunnel lining
(cement based grout – moderate pressure back filling).
Proof grouting means pressure grouting to fill the void between a precast concrete segmental lining and the
surrounding rock and which is carried out after annulus grouting.
Cut-off membranes performed after annulus- and proof grouting to prevent rest-water ingress along the
lining to the cutter head compartment in the inclined section of the tunnel.
Grouting executed with OMG (organo-mineral grout/foam).
Pre-grouting (with OPC and/or MC, and 2-component PU) to prevent:
1. Large inflow of water to occur at tunnel face which may drown tunnel.
2. Cave-in of tunnel face which may cause long stop to boring.
3. Flowing ground to take place at face which can probably drown the tunnel.
4. Moderate inflow to occur which can hamper TBM loading system.
The actual drilling pattern is 11 horizontal drilling holes (practically within excavation profile) or 6 holes in
conventional 7.5º umbrella.
The ground along the Bosporus tunnel consist of sandstone, mudstone, limestone (partially karstic) with zones of
diabase, fractures, faults of various degrees with possible hydrostatic pressure of ground waters up to 1.4 MPa.
According to the contract pre-grouting is represented as:
(a) "Fissure grouting", which means grouting works undertaken to control ground water
inflows into the Works or for ground strengthening purposes using patterns of grouted
holes, including ahead of the face being excavated, either tunnels or shafts.
(b) “Ground Stabilisation Grouting”, which means grouting works undertaken for the safe
progress of the tunnel or shaft Works.
Bentonite, cementitious or chemical grouts are to be used as the nature of the ground to
be treated and the purpose of the grouting dictates.
Other types of grouting:
(c) "Cavity grouting", which means grouting to fill any voids at rock/concrete interfaces
around structures (other than precast concrete segmental linings).
(d) "Consolidation grouting", which means the injection of grout into fissured rock around
tunnel linings.
(e) "Cut-off grouting" where used on the drawings means consolidation grouting carried
out in specific locations around tunnel linings to depths greater than the standard
consolidation grouting fans.
(f) "Contact grouting", which means grouting to fill any voids at steel/concrete interfaces.
