Prestressed Anchor Lattice Beam Experiment And Calculation Method

In recent years, the prestressed anchor lattice beams are applied in the slope reinforcement engineering more and more. It is an active reinforcement method, which can improve slope stress state and initiate it's body's self-stability by passing the anchor's huge anchoring force to the slope body through the reinforced concrete lattice beam. Currently, the study on the anchor lattice beam's design and calculating method is very scarce. Therefore, on the basis of analyzing the prestressed anchor lattice beam model test's data, further studies on the calculating method of the internal force is made in this paper, and the force characters and regulation are also discussed.Firstly, common methods in the controlling engineering of landslide are introduced, the merits and demerits of the existing prestressed anchor lattice beam internal force calculating method are also pointed out. While using the prestressed anchor lattice beam to control the close-grained soil slope and rock slope, the reverse beam method or the Winkler model can't treat the calculating method or the anchor lattice beam internal force rationally.Through the model test analysis, as to the anchor lattice beam, when the size of the carling matches with that of crossbeam, the foundation's counterforce condition can be considered to be the same basically. The counterforce in the cantilever at the end and the middle of the beam is small, while in the crossing position of the carling and crossbeam the lattice beam's counterforce is augment as the effect of the anchoring force. This paper also discusses the anchor lattice beam's calculating method, during the course of study the lattice beam is divided into two parts: carling and crossbeam, and these two parts are regarded separately as elastic foundation. Based on the semi-infinite elastic media model, this paper calculated the lattice beam's moment by using series method principle.Through the moment graph of theory calculating, the results are as follows: the elastic modulus of different directions in soil can affect the lattice beam's...