Multifunctional cement stabilized macadam foundation test piece molding device and method

Abstract

The invention relates to the technical field of road engineering testing, in particular to a multifunctional cement stabilized macadam foundation test piece molding device. The multifunctional cementstabilized macadam foundation test piece molding device comprises a rack, a lifting support, a lifting support drive device, a vibration support, buffer springs, a vibration exciter, a press head mechanism, a rotary tray, a rotary tray drive device and a barrel mold. The press head mechanism comprises a switching swing arm, a switching swing arm drive device, a rigid roller and a rubber roller. The rigid roller and the rubber roller are mounted at the two ends of the switching swing arm correspondingly, and the axis of the rigid roller and the axis of the rubber roller are in the horizontal direction. The barrel mold is fixedly mounted on the rotary tray and is matched with the rigid roller or the rubber roller. By means of the multifunctional cement stabilized macadam foundation test piece molding device, the work condition of the construction site can be simulated more really, the test piece preparation requirements of multiple conditions can be met, a molded cement stabilized macadam foundation test piece can meet the actual condition better, and experiment precision is guaranteed.

Description

technical field [0001] The invention relates to the technical field of road engineering tests, in particular to a multifunctional cement-stabilized crushed stone base test piece forming device and method. Background technique [0002] Cement-stabilized macadam base is a semi-rigid base of cement-stabilized pavement, which has good strength, integrity, water stability, and frost resistance, and is widely used in road construction in my country. The cement-stabilized gravel base needs to be compacted after paving, and the compaction methods are divided into static compaction, rubbing compaction and vibratory compaction. The equipment used for static compaction is a steel wheel roller. Using the gravity of the steel wheel roller, a vertical pressure is applied to the cement-stabilized macadam base, so that the corresponding normal stress and shear stress are generated inside the cement-stabilized macadam base. When shearing When the stress reaches the shear strength of the cem...

AI Technical Summary

Problems solved by technology

[0003] In the laboratory, it is necessary to make cement-stabilized gravel specimens, and conduct physical and mechanical performance tests on the specimens such as density, porosity, and modulus. The existing cement-stabilized gravel specimen equipment has single functions and cannot truly simulate static conditions. Force compaction, rubbing compaction and vibration compaction, for example, the application number is 201510730338.7, and the name is the invention patent application for the method and equipment for designing the mix ratio of cement-stabilized gravel base. This patent application discloses a vibration compaction instrument , by controlling the compaction frequency and compaction pressure to simulate the compaction of large-tonnage vibratory road rollers on the large-thickness cement-stabilized gravel base. On site, the cement-stabilized macadam base is compacted by the rolling of the road roller. Therefore, the cement-stabilized macadam base specimen formed by the existing equipment has a large deviation from the actual one, which affects the test accuracy.

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