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Project Details

Fabric 1

Geotube® containment system
Producer/Manufacturer: TenCate Geosynthetics Asia
Primary Use: Main Fabric

Fabric 2

Geotube® Sand Filled Mattress
Producer/Manufacturer: TenCate Geosynthetics Asia
Primary Use: Main Fabric

Fabric 3

Mirafi® PET800-50 high strength reinforcement geotextile
Producer/Manufacturer: TenCate Geosynthetics Asia
Primary Use: Main Fabric

Design Company
VEV Construction Consultants JSC

Fabrication Company
TenCate Geosynthetics

Please describe the project specifications

Deep C Industrial Zones is strategically located at Haiphong, the third largest city in Vietnam after Ho Chi Minh City and Hanoi. Its prime location offers direct connectivity to the new deep-sea port, Hanoi - Haiphong expressway, and next to Haiphong - Ha Long - China border expressway with just 12 trucking hours away to Shenzhen, China.

Deep C sets itself apart from conventional industrial parks by promoting and establishing their environmental sustainability strategies in power, water, waste and green zones to achieve common sustainability goals with investors while driving economic growth and job opportunities for the local community. Deep C’s initiatives which involve the generation of renewable energy from solar panels, wind turbines and waste, reusing and recycling wastewater, reducing plastic waste and more, offer industrial tenants a cohesive structure of sustainable practices and supports CSR objectives on environmental sustainability. At present, it has attracted over 150 investment projects worldwide with investments over USD 4 billion. Deep C aims to be the most sustainable industrial park developer and the benchmark for other industrial zones in Vietnam.

The development comprises 3,386 hectares of land, the largest industrial zone development in Vietnam that is divided into 5 separate industrial zones. The first development known as Dinh Vu Industrial Zone (Deep C Haiphong I) started in 1997 between the collaboration of Belgian investor, Rent-A-Port and Haiphong People’s Committee. The second parcel of the development known as Deep C Haiphong II encompasses 645 hectares of reclaimed land, roughly the equivalent of 900 international soccer fields.

The development of Deep C Haiphong II was required to be done sequentially in phases, with the construction of several containment dykes to allow part of the site to be reclaimed and developed while waiting for further demand and expansion.

What is unique or complex about the project?

The complexity of the project involves the construction of a containment dyke using conventional armour rock over soft ground conditions at the site, making construction very difficult. The upper 6 - 9 m of the seabed consists of very soft organic silty clay with the surface having an undrained shear strength of only 5 kPa. This creates potential local shear failure and significant loss of rockfill material into the soft seabed. The area is also vulnerable to extreme typhoons.

The successful implementation of Geotube® containment systems to create a temporary construction platform for the construction of a sea-crossing bridge adjacent to the project site, prompted the project owner to change the initial armour rock bund design to Geotube® containment systems.

The containment dykes of the first two phases of development consisted of locally dredged silty sand fill contained between 2 stacked Geotube® units on both sides. To provide the required stability for the reclamation dykes, a layer of Mirafi® PET800-50 reinforcement geotextile with an initial characteristic tensile strength of 800 kN/m was placed across the base of the reclamation dykes. On the seaward side of the dykes, additional Geotube® units was installed at the toe for scour protection. Geotube® Sand Filled Mattress was also installed from the top level of the tubes to the finished platform level for surface erosion protection caused by wave run-up during the typhoon seasons. A 9 m wide road platform was then constructed on top of the dykes as an access road.

The third phase of the development has two packages. The containment dyke consists of 3 Geotube® units stacked pyramidally with an additional tube at the toe for scour protection at the seaward side. A total of 88,000 m2 of basal reinforcement geotextiles and over 40 km of Geotube® units was supplied to the project.

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