Device for expanding compaction contact surface of road roller

Abstract

The invention provides a device for expanding a compaction contact surface of a road roller. The device comprises a sealing bag and a rubber cushion layer which are sequentially nested from inside to outside, the sealing bag further comprises a sealing layer tightly attached to the outer circumferential surface of the vibrating wheel of the road roller and zircon sand filled in the bag. The cushion layer structure sleeves the vibrating wheel of the road roller, so that in the rolling process, the wheel load is firstly transmitted to the zircon sand cushion layer, zircon sand in a non-full state flows under the action of the wheel load, the thickness under the wheel is adaptively adjusted, and meanwhile, a rectangular area with a certain width and the same length as the vibrating wheel is formed under the combined action of the elasticity of the rubber cushion layer; the contact area between the vibrating wheel and the subgrade surface is effectively enlarged, and the red sandstone fully-weathered material or silty-fine sand which is poor in cohesive force and uniform in particle size can easily reach a high-degree compaction state under the action of pressure due to the constraint effect of the contact surface.

Description

technical field [0001] The invention relates to the technical field of roadbed filling construction, in particular to a device for enlarging the compacted contact surface of a road roller. Background technique [0002] Red sandstone is widely distributed in the mountainous areas of southwest my country, and silty sand is widely distributed in desert areas. The particles of red sandstone and silt fine sand after weathering and disintegration are relatively uniform in size and the cohesion between particles is weak. During construction, after the subgrade is relatively dense and has a certain rigidity, the commonly used roller vibratory roller will reduce the contact area and increase the vibration pressure on the contact surface, so that the red sandstone with relatively uniform particle size and poor cohesion will be fully weathered and The silty sand is fragile and scattered, and it is difficult to achieve a compaction degree of more than 93%. Therefore, highway and railway p...

AI Technical Summary

Problems solved by technology

[0002] Red sandstone is widely distributed in the mountainous areas of southwest my country, and silty sand is widely distributed in desert areas. The particles of red sandstone and silt fine sand after weathering and disintegration are relatively uniform in size and the cohesion between particles is weak. During construction, after the subgrade is relatively dense and has a certain rigidity, the commonly used roller vibratory roller will reduce the contact area and increase the vibration pressure on the contact surface, so that the red sandstone with relatively uniform particle size and poor cohesion will be fully weathered and The silty sand is fragile and scattered, and it is difficult to achieve a compaction degree of more than 93%. Therefore, highway and railway projects in red sandstone areas and desert areas cannot use local materials.

[0003] Under the existing technology, in order to ensure the compaction quality of embankment filling, long-distance soil extraction or physical or chemical improvement of red sandstone weathered matter and silty sand are usually used, but the project investment is greatly increased, and due to excavation and abandoned Disposal will also cause a large number of environmental problems and secondary disasters

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