15 June 2026

MSE Walls in Cohesive Soils: Challenges That Are Not Always Visible

When the Structure Looks Strong, but the Risk Comes from Within the Soil MSE walls are often chosen for their efficiency, flexibility, and proven structural performance. In many projects, the wall appears stable once construction is complete. However, in cohesive soil conditions, the real challenges often emerge only after the structure is in place. Water does not immediately appear as a threat. Pore water pressure is not always detected at an early stage. And when its impact becomes apparent, corrective measures are no longer simple.

The Core Issue: Cohesive Soil Behavior and Water

Unlike granular soils, cohesive soils have low permeability. Water that enters the system takes a long time to dissipate. As a result, pore water pressure can accumulate behind the MSE wall structure.

Under certain conditions, this can lead to:

A reduction in effective stress within the soil
Decreased shear strength
Increased wall deformation
Long-term stability risks

These issues often do not appear during early construction stages but develop over time as site conditions change.

Real Impacts in the Field

In many projects, challenges with MSE walls in cohesive soils are observed as:

Wall movements exceeding design expectations
Reduced structural performance after rainfall events
The need for post-construction strengthening
Significant gaps between design assumptions and actual field conditions

Over the long term, these conditions can increase maintenance costs and the risk of functional failure.

Why Conventional Approaches Are Often Insufficient

In many MSE wall designs, drainage systems are still treated as supporting elements rather than core components of structural stability. Approaches that work well in granular soils are often applied to cohesive soils without adequate adjustment.

As a result:

Pore water pressure is not effectively controlled
Drainage performance deteriorates over time
Hidden risks remain within the system

This is where the gap between theoretical design and field reality often becomes evident.odern hydraulic engineering now focuses on solutions that combine flexibility, durability, hydraulic performance, sustainability and faster installation.

Drainage as a Key Factor in MSE Wall Performance

For MSE walls in cohesive soils, drainage is not merely an accessory. It plays a direct role in controlling water, maintaining effective stress, and ensuring the structure performs as intended.

A well-designed drainage approach can:

Significantly reduce pore water pressure
Improve long-term stability
Minimize excessive deformation
Deliver more consistent performance throughout the service life of the structure

Learn More in Our Technical Webinar

These are the key topics that will be explored in greater depth in the webinar “Challenges of MSE Walls in Cohesive Soils: How ParaDrain Becomes the Solution.” This webinar is designed for engineers seeking a more realistic understanding of technical challenges and how drainage solutions can be applied based on real project case studies.

Join our webinar