3D Numerical Limiting Case Analyses of Lateral Spreading in a Column-Supported Embankment

Huang, Zhengyu; Ziotopoulou, Katerina; Filz, George M.

doi:10.1061/(asce)gt.1943-5606.0002162

Cited by 22 publications

(20 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results were subsequently compared with those obtained by a typical unit cell model. Huang et al [51] presented threedimensional numerical analyses of a column-supported embankment case history using the finite difference method. Xie et al [52] developed a more rigorous theoretical solution to compute the degree of consolidation for column-reinforced composite foundations.…”

Section: Foundation Treatment Methods For Ballastless Trackmentioning

confidence: 99%

Review of research on high-speed railway subgrade settlement in soft soil area

2020

View full text Add to dashboard Cite

Construction issues of high-speed rail infrastructures have been increasingly concerned worldwide, of which the subgrade settlement in soft soil area becomes a particularly critical problem. Due to the high compressibility and low permeability of soft soil, the post-construction settlement of the subgrade is extremely difficult to control in these regions, which seriously threatens the operation safety of high-speed trains. In this work, the significant issues of high-speed railway subgrades in soft soil regions are discussed. The theoretical and experimental studies on foundation treatment methods for ballasted and ballastless tracks are reviewed. The settlement evolution and the settlement control effect of different treatment methods are highlighted. Control technologies of subgrade differential settlement are subsequently briefly presented. Settlement calculation algorithms of foundations reinforced by different treatment methods are discussed in detail. The defects of existing prediction methods and the challenges faced in their practical applications are analyzed. Furthermore, the guidance on future improvement in control theories and technologies of subgrade settlement for high-speed railway lines and the corresponding challenges are provided.

show abstract

Section: Foundation Treatment Methods For Ballastless Trackmentioning

confidence: 99%

Review of research on high-speed railway subgrade settlement in soft soil area

2020

View full text Add to dashboard Cite

show abstract

“…The reinforcement using columns in the soft soil thus proposed as the solution for mitigated approach. Analogously, Huang et al in [8] recorded a larger than 200mm vertical settlement on the surface of soft soil with the reinforcement from concrete columns. Reinforcement using concrete is also the commonly choice in such cases [7], [8], [9].…”

Section: Introductionmentioning

confidence: 70%

“…Analogously, Huang et al in [8] recorded a larger than 200mm vertical settlement on the surface of soft soil with the reinforcement from concrete columns. Reinforcement using concrete is also the commonly choice in such cases [7], [8], [9]. Besides, the appearance of the displacement of pipe will lead to the well-known ring bending force which is widely recorded as the cause of curriculum stress increase [10], decrease of safe factor [11] and coupling with in-plane bending to reach much higher equivalent stress in pipe [12].…”

Section: Introductionmentioning

confidence: 70%

“…These lead to the increase of the risk of suffering from various adverted soil-related phenomena. Some of them are: crossing the ground faults [1], [2], land sliding [3,4], tunnel constructing [5], [6] or deformation of the soil due to the appearance of the embankment [7], [8], [9]. Among these threads, the use of embankment on soft soil is recorded as a significant reason for failure to be occurred, which needs reinforcement for the natural soil.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mitigating effect of embankment to adjacent pipe with CDM columns

Pham

Bui

et al. 2021

E3S Web Conf.

View full text Add to dashboard Cite

Pipelines are valuable infrastructures that covering a large area or expanding to long distance for the transporting function. This leads to the variety of loads and effects applied on such buried structures. A thread to pipeline integrity is the construction of the embankment on the soft soil which leads to the displacement of the pipe adjacent to the slope. This displacement will effect to the increase of internal force or causing failure of the near-by pipes. The use of concrete pile to improve the soil properties may be a solution; however, the cost for this is expensive. To propose an alternative solution for the problem, this study uses a system of cement deep mixing, CDM, columns as the solution for protecting the pipe. A simple 2D Finite Element, FE, model using Plaxis software has been established based on the equivalent soil approach which considering the CDM columns and their surrounding soil as an unified soil. The effectiveness of the proposed solution has been numerically investigated and proven. The lateral displacement of pipe and the maximum ring bending moment and other internal forces are significantly reduced with the appearance of the CDM columns. The selective parametric study has been implemented revealing the critical input variables are the distance of pipe to the slope and the length of the CDM column.

show abstract

“…Finite element method is the most potent numerical technique for analysing the problem consisting of embankment constructed on soil with CFG-lime composite column system. The finite element method is adopted widely to model the soil improved using various types of columns [16][17][18][19][20][21][22][23][24]. When the soil improved with columns is modeled using finite element method, the actual three-dimensional problem consisting of soil and columns is converted into a twodimensional problem with plane strain condition to minimise the computational time.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stability of Embankment Constructed on Soft Consolidating Soil with Lime–CFG Composite Column System

Prakash

Krishnamoorthy

2021

Int. J. of Geosynth. and Ground Eng.

View full text Add to dashboard Cite

Effectiveness of providing lime and CFG composite column system on the safety factor of embankment constructed on consolidating soil is studied at different time intervals during consolidation of foundation soil. The effectiveness of providing composite column system is compared with the effectiveness of providing only lime or CFG columns. In addition, the effectiveness of composite column system on settlement of foundation soil and consolidation process is also investigated. Embankment, foundation soil and columns are modeled using finite element method. Numbers of trial surfaces with different center and radius are generated at each time interval and the critical surface is selected to calculate the safety factor using the effective stresses obtained by finite element analysis. From the study, it is concluded that provision of lime or CFG columns, either individually or in combination, reduces the settlement and improves the safety factor. However, the most effective type of columns and their arrangement to reduce the settlement may not be the most effective to enhance the safety factor and hence, the type of columns and their arrangements has considerable influence on the purpose for which columns are provided.

show abstract

3D Numerical Limiting Case Analyses of Lateral Spreading in a Column-Supported Embankment

Cited by 22 publications

References 51 publications

Review of research on high-speed railway subgrade settlement in soft soil area

Review of research on high-speed railway subgrade settlement in soft soil area

Mitigating effect of embankment to adjacent pipe with CDM columns

Evaluation of Stability of Embankment Constructed on Soft Consolidating Soil with Lime–CFG Composite Column System

Contact Info

Product

Resources

About