Study on embedded length of piles for slope reinforced with one row of piles

Shikou, Yang; Ren, Xuhua; Zhang, Jixun

doi:10.3724/sp.j.1235.2011.00167

Cited by 47 publications

(21 citation statements)

References 12 publications

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“…1.500, which was obtained with the introduction of the proposed containment elements, satisfies the self-imposed parameters in this methodology to satisfy the overall stability. With this non-invasive, emergency methodology, we would have stabilized the slope and avoided further damage and movement in the affected buildings (Zheng et al 2009;Yang et al 2011). Figure 14 shows the row of micropiles and anchors that are designed and executed with this proposed methodology and the state in which the main building was left after this emergency intervention and its overhaul.…”

Section: Resultsmentioning

confidence: 99%

“…These methods allow the analysis of many common types of landslides, such as translational, rotational, topple, creep, and fall, etc. The stability analysis of this computer program can take into account the pore pressure and simulate the water infiltration into the slope's soil using the finite element method (FEM) to determine the saturated/unsaturated water flow (Brooks and Corey 1964;Yang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Calculation of micropiles and anchors to reinforce a slope in emergency situations: application in Málaga, Spain

Gutiérrez-Martín

Millán-Martín²,

Castedo

et al. 2021

Geomatics, Natural Hazards and Risk

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The importance of preserving affected buildings and infrastructures to landslides is a critical problem in some areas. A system that is less invasive than traditional concrete diaphragm walls or piles is proposed in this work. The proposed system consists of the execution of a row of micropiles and anchors with a methodology of calculation based on the Spencer's limit equilibrium method. Micropiles, as a possible measure for rapid reinforcement of a slope, are always designed in groups. Slope stability analysis automatically employs the pore pressures calculated in groundwater analysis. After a landslide is reinforced, the stability coefficient of the landslide can be increased from 0.907 to 1.504 with the application of our developed model in the application example in M alaga, southern Spain. The results of the proposed model show that a row of micropiles and anchors can effectively enhance the landslide stability in emergency cases. The results and conclusions are helpful in providing a theoretical foundation to clarify the failure mechanism and provide a reference for the design of micropiles and anchors for landslide events.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calculation of micropiles and anchors to reinforce a slope in emergency situations: application in Málaga, Spain

Gutiérrez-Martín

Millán-Martín²,

Castedo

et al. 2021

Geomatics, Natural Hazards and Risk

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show abstract

“…The second phase of the proposed procedure (Figure 5) intended to obtain uniformity of chemical and physical features in the stabilized subsoil [68,73,90] until the goal desired was reached. As shown in Figure 10, the contrast tomography gave a favorable result after the cement grout injections were applied.…”

Section: Approach Methodology: Applicationmentioning

confidence: 99%

Stabilization methodology in foundation soils by ERT-3D. Application in Estepona, South Spain.

Gutiérrez-Martín¹,

Yenes²,

Fernández³

et al. 2021

Preprint

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The paper proposes a novel methodology for the stabilization of shallow foundations, with a simplified model combined with 3D Electrical resistivity tomography (ERT-3D) and conso- lidation injections. To determine its usefulness, the method has been applied in a case located in Estepona (southern Spain). The chosen tomography model is the dipole-dipole configuration, with an optimized distance between electrodes of 0.80 m for a better visualization of the foundation subsoil; with this parameterization, a total of 72 electrodes were installed in the analyzed case. In this work, the depth of the anomaly in the building's supporting subsoil was detected ranging from 2.00 m to 3.90 m deep. The study also delineates areas of high resistivity variations (50-1,000 Ω m) in the middle and eastern end of the field. These data have been validated and corroborated with a field campaign. The results of the ERT-3D monitoring are presented, once the investment data has been processed with the RES3DINV software, from the beginning to the end of the stabilization intervention. The novelty occurs with the interaction between the tomography and the foundation consolidation injections, until the final stabilization; very useful methodology in case of emergency consolidation, where there is a need to minimize damage to the building. Thus, people using this combined system; will be able to practically solve the initial anomalies of the subsoil that caused the damages, in a non-invasive way, considerably lowering the value of the resistivities.

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“…In addition, the graphical presentation of the FEM program allows better understanding of the failure mechanism (Griffiths and Lane, 1999). The shear strength reduction finite element method had been successfully used to evaluate the stability of slopes reinforced with piles and anchors (Wei and Cheng, 2009;Yang et al 2011;Cai and Ugai, 2003). During the shear strength reduction technique, the shear strength envelope of material is reduced by a factor of safety until the deformation of the FEM models become unacceptably larger or the solution do not converge (Griffiths and Lane, 1999;Hammah et al, 2005).…”

Section: Introductionmentioning

confidence: 96%

Numerical Study of Slope Stabilization Using Recycled Plastic Pin

Khan

Hossain

Lozano

2014

Geo-Congress 2014 Technical Papers

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Moderate (3H : 1V) to steep (2.5H : 1V) slopes and embankments underlain by expansive clayey soils are susceptible to shallow land sliding during intense and prolonged rainfall events. These failures are predominant in North Texas area and cause significant maintenance problems for the Texas Department of Transportation (TxDOT). The Recycled Plastic Pin (RPP) has potential to be utilized in slope stabilization as a remedial measure of shallow slope failure. A parametric study was conducted to evaluate the effect of different spacings of RPP on the factor of safety and deformation of the slope. The objective of the current study was to investigate the effect of spacing and length of RPP over the factor of safety using Finite Element method (FEM). The analysis was conducted using 2D FEM software package PLAXIS 2D and factor of safety of the slope was determined using the strength reduction technique. A highway slope constructed using high plastic clayey soil, located over US 287 near St. Paul overpass in Midlothian, Texas was selected as reference slope. The strength of the slope was back analyzed using PLAXIS 2D at factor of safety equals to unity. As a remediation technique, RPP was selected for the slope stabilization and the slope was analyzed with different lengths (2.44 m to 3.65 m, 8 ft to 12 ft) and spacings (0.61 m c/c to 2.44 m c/c, 3 ft c/c to 8 ft c/c) of RPP. The FEM results indicated that RPP provided resistance against the shallow failure and resulted increment in factor of safety by shifting the failure plane to a deeper depth toward deep seated failure. In addition, the factor of safety increased with the increment in RPP length as higher resistance was observed from the foundation soil. The factor of safety of the reinforced slope remained almost constant up to RPP spacing of 1.5 m (5 ft) c/c and then decreased with further increment in spacing. The horizontal deformation of the slope was greater with the increment in spacing of RPP.

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Study on embedded length of piles for slope reinforced with one row of piles

Cited by 47 publications

References 12 publications

Calculation of micropiles and anchors to reinforce a slope in emergency situations: application in Málaga, Spain

Calculation of micropiles and anchors to reinforce a slope in emergency situations: application in Málaga, Spain

Stabilization methodology in foundation soils by ERT-3D. Application in Estepona, South Spain.

Numerical Study of Slope Stabilization Using Recycled Plastic Pin

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