| 摘要 |
Embodiments relate to an apparatus and method for performing a split-lateral load test. Embodiments use a double hydraulic jack to apply two lateral loads, having equal magnitudes and opposite directions, to the soil layer of an excavation for a deep foundation element. Data such as the magnitude of the lateral load and magnitude of the displacement of the loading mechanism upon application of the lateral load can be measured and/or recorded. Embodiments can yield soil modulus (Es) information in a form analogous to a p-y curve, which can be used to design a pile structure and pile placement, and model a pile response to lateral loading using computer software. Embodiments do not require the casting of concrete, and allow the split lateral loading mechanism to be sequentially positioned, and apply lateral loads, at multiple depths in an excavation. Embodiments simultaneously apply bi-directional lateral loads at multiple depths in an excavation. |
| 主权项 |
1. An apparatus for performing a split-lateral test, comprising:
a loading mechanism, wherein the loading mechanism comprises:
a first bearing plate;a second bearing plate;a hydraulic jack,wherein the hydraulic jack comprises:
a piston, a chamber, and a hydraulic fluid input, such that when pressurized hydraulic fluid is inputted to the hydraulic fluid input, the pressurized hydraulic fluid pushes the piston and pushes the chamber such that the piston tends to extend from the chamber, wherein the loading mechanism is configured such that when pressurized hydraulic fluid is inputted to the hydraulic fluid input the piston applies a first force to the first bearing plate and the chamber applies a second force to the second bearing plate tending to push the first bearing plate and the second bearing plate away from each other, wherein the first force has a first force magnitude and is in a first force direction, wherein the second force has a second force magnitude and is in a second force direction, wherein the second force direction is opposite the first force direction, wherein the loading mechanism is configured to be positioned in a load orientation within an excavation having:
an excavation diameter, d, greater than or equal to 24 inches;an excavation depth, D, greater than or equal to 5 feet; andan excavation longitudinal axis parallel with gravitational field lines of the surrounding gravitational field,such that a piston longitudinal axis is perpendicular to the excavation longitudinal axis,
wherein when the loading mechanism is positioned in the load orientation within the excavation and pressurized hydraulic fluid having a pressure, P, greater than a first threshold is inputted to the hydraulic fluid input, the piston extends from the chamber until the first bearing plate contacts a first section of a side of the excavation and the second bearing plate contacts a second section of the side of the excavation, wherein when the loading mechanism is positioned in the load orientation within the excavation, the first bearing plate is in contact with the first section of the side of the excavation, the second bearing plate is in contact with the second section of the side of the excavation, and pressurized hydraulic fluid with pressure, P, greater than a second threshold is inputted to the hydraulic fluid input,
(i) the first bearing plate applies a first lateral load to the first section of the side of the excavation;(ii) the second bearing plate applies a second lateral load to the second section of the side of the excavation, and(iii) the piston extends from the chamber by displacement, 2y, wherein the first lateral load has a first load magnitude and is in a first load direction, wherein the second lateral load has a second load magnitude and is in a second load direction, wherein the second load magnitude is the same as the first load magnitude, wherein the second load direction is opposite the first load direction. |
