Photovoltaic Support Rock Anchor Foundation
The steel anchor rod foundation is commonly used in harder soil layers, such as gravel-sand layers and bedrock. The surface of the steel anchor rod is equipped with blades or small-diameter continuous helical blades. During construction, mechanical equipment is used to pre-drill holes in the hard soil layer, with the hole diameter larger than that of the steel anchor rod. After inserting the steel anchor rod, cement grout is injected, and the upper part of the rod is connected to the support column. The steel anchor rod foundation is suitable for hard bedrock and similar soil layers.
When constructing a photovoltaic power station on a rock foundation, especially on a sloped rock surface, the rock anchor foundation becomes the preferred foundation type. However, the rock anchor foundation requires specific rock conditions—it is suitable for moderately weathered or slightly weathered rock, whereas highly weathered rock is not suitable for this type of foundation.
Additionally, the rock foundation should not have significant joints to prevent cracks from propagating along the joints during construction, which could lead to the failure of the rock anchor foundation.
During geotechnical surveys for rock anchor foundations, it is recommended to increase the number of boreholes as needed to ensure comprehensive, detailed, and reliable information about the rock layers.