Soil nailing in the Hastings Beds

Pedley, M. J.; Pugh, R. S.

doi:10.1144/gsl.eng.1995.010.01.32

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…j As the distal end gauges measured tendon forces greater than the proximal ones no effect of facing was considered in the analysis. j Pedley and Pugh (1995) state that no bending of soil nails was observed, which confirms the assumption that soil movements transverse to the nails could be ignored. j In the absence of published data on soil elastic properties at the case study site the sets of parameters as listed in Table 1 were used for enveloping the test results.…”

Section: Comparison With a Case Studysupporting

confidence: 63%

“…(b) To use the 'observational approach' and to use in the design an assumed or analysed soil movement diagram and then prove during the construction that it provides conservative results. The proof of the design conservatism may for example comprise monitoring of soil movement between the soil nails and then back-analysis of the results, similarly to the analysis carried out in this paper for the Pedley and Pugh (1995) results. (c) To carry out a sensitivity analysis for a variety of soil movement diagrams and to demonstrate that for any soil movements nail forces in the alternative SNW design are not lower than those in the conventional design.…”

Section: Enhancing Soil Nail Efficiencymentioning

confidence: 98%

“…j It has been shown in a number of case study publications (e.g. Banerjee et al, 1998;Pedley and Pugh, 1995;Sakr and Kimmerling, 1995) that there is little sign of soil nail forces tailing off towards the distal end of monitored nails, even for very low tiers of soil nails. Indeed, forces were in some instances increasing towards the lower tiers and towards the distal end of soil nails, that is, where the effect of soil movement in the active zone is potentially small.…”

Section: Layer Amentioning

confidence: 99%

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Effect of axial stiffness on soil nail forces

Chmoulian¹

2015

Proceedings of the Institution of Civil Engineers - Geotechnica

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Currently used soil nail design methods normally ignore axial stiffness of soil nails and assume that nail–soil adhesion fully develops during construction of the soil nail wall, which would allow the use of conventional stability analysis with peak soil parameters for the newly excavated slopes. Although not fully consistent with the monitoring results for soil nails in working conditions, the resulting structures are proven by the accumulated practical experience for conventional geometry and conventional materials used in soil nail construction. This paper considers the effect of axial stiffness on the forces developing in soil nails, which affects the design of soil nails of lower stiffness, for example soil nails reinforced with fibre-reinforced polymer tendons, or nails of greater lengths. The use of fibre-reinforced polymers has considerable advantages in construction due to their light weight, ease of site preparation and high durability. However, their use is often deterred by their relatively low stiffness and lack of ductility. The paper discusses the methods by which negative effect of the use of soil nails of lower axial stiffness and ductility can be overcome in design.

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Section: Comparison With a Case Studysupporting

confidence: 63%

Section: Enhancing Soil Nail Efficiencymentioning

confidence: 98%

Section: Layer Amentioning

confidence: 99%

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Effect of axial stiffness on soil nail forces

Chmoulian¹

2015

Proceedings of the Institution of Civil Engineers - Geotechnica

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“…For flexible facing systems, the soil-nailed structure was recommended to be applied on a slope steeper than 45º with various cohesive soils [1], 68º with Mercia mudstone group, and firm to stiff sandy clay [14]. Also, for the steeper slope about 70º, it was applicable when the soil type is silty clay and clayey sand [17].…”

Section: Slope Geometrymentioning

confidence: 99%

Numerical evaluation on steep soil-nailed slope using finite element method

2021

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In conventional design of soil-nailed slope, the nail parameters such as nail spacing (1–2 m), and nail inclination (10º–20º) have been recommended without considering any specific slope angle. Henceforth, this paper presents a numerical evaluation on the soil-nailed slope with flexible facing based on the finite element method in order to investigate the range of those two parameters with any size of nail head in various slope angles (45º, 55º, 65º, and 75º). Based on a minimum factor of safety (FSmin = 1.5), the analysis results indicated that the suggested range of those parameters in the conventional specification was applicable in the slope angle of 45º and 55º with any sizes of nail head. Nevertheless, it was not practical for slope angle of 65º and 75º, which required the size of nail head at least 400 × 400 × 250 mm, with nail spacing less than or equal to 1.5 m, and nail inclination from 5º to 10º.

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