Comparison between responses of reinforced and unreinforced embankments due to road widening

Abstract

The objective of this work is to compare the responses of geosynthetically-reinforced embankment and unreinforced embankment due to road widening by using the centrifuge model tests and a two-dimensional (2D) finite element (FE) model. The measured and calculated responses of the embankment and foundation exposed to road widening include the settlement, horizontal displacement, pore water pressure, and shear stresses. It is found that the road widening changed the transverse slope of the original pavement surface resulting from the nonuniform settlements. The maximum horizontal movement is found to be located at the shoulder of the original embankment. Although the difference is small, it is clearly seen that the geosynthetic reinforcement reduces the nonuniform settlements and horizontal movements due to road widening. Thus the reinforcement reduces the potential of pavement cracking and increases the stability of the embankment on soft ground in road widening.

A Novel Approach to Determine the Treatment Range of Prefabricated Vertical Drains and Cement‐Soil Mixing Piles for Wide and High Embankment on Soft Ground

“…[31] On the other hand, with the increase of embankment height, the ground at the foot of the slope is more vulnerable to be unstable and the settlement of the ground is greater, which requires more stronger ground treatment measures. [32][33][34][35][36] Hence, for wide and high embankments on soft ground, the two mainstream treatment methods mentioned above (i.e., PVDs and CSMPs) can be considered together, i.e., PVDs are placed near the embankment centerline and CSMPs are placed near the foot of the slope, so as to meet the dual challenges of wide and high embankments, as shown in Figure 2. This comprehensive treatment method has been applied successfully in the Sanya Station yard of the Hainan East Ring High-speed Railway.…”

Numerical Analysis of Differential Settlement in Road Due to Widening Considering Different Reinforcement Techniques

“…Therefore, the rehabilitation, widening, and addition of new carriageways in old roads are important to maintain the level of service (LOS). In road widening projects, most deformations in the embankments develop due to differential settlement between the old and widened portions [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The impact of traffic load on the widened portion of the road is more dominant than the volume [23,24].…”

A Study on the Genetic Algorithm Optimization of an Asphalt Mixture’s Viscoelastic Parameters Based on a Wheel Tracking Test

“…In addition, there are many dynamic modulus testing methods with different loading modes and different specimen shapes, including uniaxial compression, indirect tension, four-point bending, etc., [16][17][18]. Huang et al conducted dynamic modulus tests for trapezoid beams and cylinders and found that the dynamic modulus was smaller in trapezoid beam tests [19]. Ruan et al reported that the dynamic modulus was larger under a haversine loading mode than under a bell-shaped loading mode [20].…”