The interchange is composed of three-dimensional intersections and several ramps to guide vehicles heading towards different directions. The project is located in a developed country of the Middle East. The main roads are connected to the downtown. In fact, the uneven settlement of the foundation creates difficulties to the road users. To improve this condition, the precompression method is included in the project design. For a period, temporary static load is applied to reduce the soil void ratio and water content. Simultaneously, it increases the shear strength of soil and lateral stress to improve structural stability. The weight of the soil in the reinforced structure provides friction to resist the lateral earth pressure and reduce the lateral deformation, and the precompression method can eliminate the settlement problem after construction. Thus, we can stay that the reinforced structure has the ability to bear settlement. The two sections of the project are 130m and 205m respectively, and the three ramps of the road are all equipped with a reinforced structural. At the same time, the geogrid Type A (ACEGrid® GG150-I) is laid to wrap-around. The Type B (GG200-I) is reserved for the wall surface to combine with modular block. The modular block reinforced retaining wall is constructed by using the landscape stone (hollow concrete block), which is connected with the geogrid to form a safe structure, and can appeal to the natural ecology and beauty, it is a convenient construction and cost-effective method compared to a traditional concrete wall.
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