Bangladesh | Nuclear Power Plant

Project Overview

In December 2015, Bangladesh signed an agreement for the construction of two nuclear power plants for a total investment of 11.6 billion euros.

The plant concerned by the works is located in RUPPUR, approx. 160km North West of the capital DACCA.

Ground Condition

The soil at the project site predominantly consists of silty sand. Additionally, some layers of loam and clay have been identified throughout the area.

Menard Solution

To solve the problem of soil liquefaction due to the seismic activity and simultaneously improve the deformation properties of the soil, at the stage of project documentation, the technology of Deep Soil Mixing has been chosen by the client.

The principle of the DSM is to improve the strength properties of the soil by mixing it with the binder (cement slurry). As a result, a solidified mixture of soil and cement is created with considerably higher strength and mechanical parameters.

Design requirements was to perform 2m diam DSM columns using a single auger with wet method. Mixing depth was from 3 to 15m and incorporation ration 100% (means 1 piles is overlapped 6 times).

Targets were:

• UCS>2Mpa after 28 days,
• No more than 5% of non mix part,
• EV2>100MPa,
• Swaves > 1100m/s,
• friction angle>35°

To perform the jobsite, 6 drilling rigs, 5 mixing plant and 180 people were mobilized on site to ensure works during 24 hours a day, 7 days a week. After 10 months of production, the project has been completed in dedicated time and budget.