Abstract:

The transferring equation of the prestressed force from slope surface into slope body in singly anchored soil-like slope is deduced and discussed on the assumption that the slope body is elastomeric. The transferring coefficients of the prestressed force are put forward according to the transferring formula. The conclusions are drawn that the spreading angle of the prestressed force from slope surface into slope body in singly anchored slope is approximate 39º; and that the optimal space between anchors is about 3.2 m. Some centrifugal model tests are carried out according to a strongly weathered granite slope locating at K617 of G232 road. 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 in the main with what from theoretical study. The coefficients of the prestressed force obtained from model tests are related to the amount of the prestressed force, while it is apart from the amount of the prestressed force in the theoretical study. The plastic deformations that occur in the model tests but not be considered in the theoretic study are the main reason. Both the theoretical study and the model tests result in that slope surface protection must be taken into consideration because the effect of the reinforcing is indistinctive in the surface layer of about 2 m.

Key words: singly anchored soil-like slope, prestressed force, transferring discipline