About Pull-out strength of photovoltaic support ground nails
understand the influence of matric suction on the pull-out capacity of soil nails installed in compacted sand under both saturated and unsaturated conditions. Pull-out tests were performed on the nails installed vertically, horizontally and at.
understand the influence of matric suction on the pull-out capacity of soil nails installed in compacted sand under both saturated and unsaturated conditions. Pull-out tests were performed on the nails installed vertically, horizontally and at.
The strength properties examined in this study include the parameters of shear strength, modulus of elasticity and soil density, which were estimated by plate load test, pull-out test and in situ direct shear tests.
The geotechnical capacity or pull out strength of the soil nail can be calculated using the Equation 1. Q ult = q u ult x A B (1) Where, Q ult = Ultimate Pull Out Strength (kN), u ult= ultimate bond stress q (kN/m2) can be obtained from Table 1 and As = Nail Bonded Area (m2). This estimated pull out strength is to be used during the design stage.
This paper reports the pull out resistance of soil nails and ground anchors installed in holes drilled using both unflushed continuous flight auger and flushed rotary drilling techniques. Particular focus is given to pull out testing of soil nails in continuous flight auger drilled holes and grooving of the augered hole to improve.
This Geoguide presents a recommended standard of good practice for the design, construction, monitoring and maintenance of soil-nailed systems in Hong Kong. The Geoguide summarises the experience gained from the use of the soil nailing technique in Hong Kong and the findings of related technical development work.
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6 FAQs about [Pull-out strength of photovoltaic support ground nails]
Do soil nails have a pull-out capacity?
The present understanding of shear strength of unsaturated soils has been extended for interpretation and prediction of the behaviour of soil nails. The pull-out capacity is a key parameter for the design of soil nails.
What is soil nail pullout resistance?
In current practices, pullout test has been conducted to determine the soil nail pullout resistance (skin friction on the interface between soil nail and soil) and soil nail movement. The pullout resistance (qs) of the nail was obtained by dividing the peak pullout force by the active surface area of the nail
How to calculate geotechnical capacity or pull out strength of soil nail?
The geotechnical capacity or pull out strength of the soil nail can be calculated using the Equation 1. Where, Qult = Ultimate Pull Out Strength (kN), qu ult = ultimate bond stress (kN/m2) can be obtained from Table 1 and As = Nail Bonded Area (m2).
Does matric suction affect the pull-out capacity of soil nails?
A comprehensive experimental program was conducted to understand the influence of matric suction on the pull-out capacity of soil nails installed in compacted sand under both saturated and unsaturated conditions. Pull-out tests were performed on the nails installed vertically, horizontally and at an inclination of 15° to the vertical.
What is the pullout force of bonded soil nails?
The result from the pullout test at point A24 and B22 obtained the pullout force of 148.5 kN which was 1.5 times of the design working load. The soil nails displacement in these points was observed 1.795 mm and 3.267 mm which reveals lower than 0.2% of the bonded soil nail length (less than 36 mm).
Can soil nail resist 900 kn pull out load?
This revealed the result of the pull out resistance obtained from the field study is within the ranges and soil nail are demonstrating sufficient pull out resistance to resist the pull out load up to 900 kN. Figure 7 shows the plot of test load against displacement.
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