关键词: 框架锚固, 类土质边坡, 预应力, 传递规律

Abstract: On the assumption that the beams are rigid, and that the slope body is elastomeric, the anchoring concentrated force is translated into rectangular distributed force. And then, according the characters of soil-like slopes, the transferring equation of the prestressed force from slope surface into slope body in frame anchored soil-like slope is deduced. The transferring coefficients of the prestressed force are put forward according to the transferring formula. Some centrifugal model tests are carried out according to a granite soil-like slope locating at K617 of G232 national highway. In the centrifugal model tests, earth pressure cells are set at different points of the slope body to monitor the increased earth pressures caused by the prestressed force. And then the transferring discipline of the prestressed force from slope surface into slope body can be brought out. The results drawn out from centrifugal model tests agree with what from theoretical study mainly. The conclusions are drawn out from the calculations and model tests that the plastic deformation of the frame anchored slope body is distinctly small than single anchored slope body; and that the effect on distribution factor of prestressing force in frame anchored slope is smaller than what is in single anchored slope. The distribution factor of prestressing force is 0.4 in frame anchored slope, while it is 0.9 in single anchored slope, which indicates that about 56% of the prestressing force is well spread around. It is obvious that the compression strain in frame anchored slope is smaller than what is in single anchored slope, and that the decreasing of prestressing force can be smaller in frame anchored slope. The optimal space of anchors can enlarge to 4.2m for frame anchored slope from 3.2m in single anchored slope.

Key words: frame-anchor, soil-like slope, prestressed force, transferring discipline