Vietnam | SOFE Phase 1

Project Overview

EZRA Group, through their Vietnamese fully owned company SOFEL, has acquired a plot of land in Vung Tau city in Vietnam. This plot of land is under development into a shipyard for the construction of barge and repair works for ships to serve the offshore oil industry. As part of this development, a quay is under construction along the sea coast.

Ground Condition

The ground to treat was made of 2 layers:

• The top layer was a medium silty sand of 6 m thick, with a qc = 5 MPa.
• The second layer, below, was a very soft clay (with organic content) of 10 m thick, with a qc = 0.4 MPa.

Then, below, is a layer of stiff to very stiff clay.

Menard Solution

Due to important ground displacements, Menard proposed a solution using Soil Mixing to ensure the stability of the platform during the temporary and final stage of the construction of the quay, after dredging phases.

Menard’s solution is to improve the platform stability against the wharf with Soil Mixing double columns on a 100 m platform length, 20 m wide. Those columns have been linked to the sheet piles on-shore and off-shore sides. On site, the treatment consisted of:

• 52 lines with 21 double columns of 60 cm diameter (20 m length on-shore and 2 m off-shore)
  perpendicular to the shore line with the sheet piles.
• 2 double line diameter 80 cm (1 on-shore and 1 off-shore) all along the shore line.