Naohori Self-Supporting High School--SELFEARTH-RETAINING=Hc
Author: hirocherry7312Executions: 9858
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Hc = 2 × C / γ × tan(45° + φ/2) × Q / γ
Hc = Maximum excavation depth for direct excavation (m), C = Cohesion of the undisturbed soil (kN/m²), unit weight of the ground (kN/m³), Q = overburden load (kN/m²), γ = unit weight of the ground (kN/m³), φ = angle of internal friction of the ground (degrees)
Hc = Maximum excavation depth for direct excavation (m), C = Cohesion of the undisturbed soil (kN/m²), unit weight of the ground (kN/m³), Q = overburden load (kN/m²), γ = unit weight of the ground (kN/m³), φ = angle of internal friction of the ground (degrees)
| H | m |
According to the Industrial Safety and Health Act, when excavating natural ground with a vertical depth of 1.5 meters or more, “as a general rule, soil retention and shoring structures must be installed.”
When performing excavation work on natural ground where the height of the excavation face is 2 meters or more, the supervisor must inspect equipment and tools, determine work methods, and direct operations on-site to prevent workplace accidents.
When performing excavation work on natural ground where the height of the excavation face is 2 meters or more, the supervisor must inspect equipment and tools, determine work methods, and direct operations on-site to prevent workplace accidents.
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Let P represent the lateral earth pressure. Since the self-supporting height of the ground reaches equilibrium when P = 0, it can be calculated using the following modified equation: