Model Experimental Study on a Rapidly Assembled Lattice Beam Support Structure

In order to investigate the mechanical properties and supporting effect of the rapidly assembled lattice beam supporting structure in slope engineering, an indoor physical model test based on a scale ratio of 1:2 was carried out to simulate the typical landslide geological conditions of a highway slope. The structural design, construction technology and mechanical response characteristics of the assembled lattice beam under different loads were systematically studied. The stress process of the slope was simulated by the graded vertical loading method, and the evolution law of the soil pressure at each measuring point of the lattice beam cross beam and vertical beam was monitored. The test results show that the assembled lattice beam does not significantly participate in the load transfer of the soil at the initial loading stage. As the load gradually increases, its load-bearing capacity is significantly improved, and the supporting effect is obvious. The earth pressure of the cross beam is non-uniformly distributed along the length direction, and the force near the node and the edge area is significantly higher than that in the mid-span position. The earth pressure of the vertical beam shows a decreasing trend along the height direction, which reveals its transfer law to the concentrated load. The test results can provide a theoretical basis and experimental reference for the design and optimization of a bolt-fabricated lattice beam structure under complex geological conditions.