Manufacturing method of sound barrier unit plate through prestressed reactive powder concrete

Abstract

The invention discloses a method for manufacturing a prestressed active powder concrete sound barrier unit plate. The unit board is mainly composed of active powder concrete board mixed with steel fiber, high-strength steel wire and sound-absorbing rock wool. By tensioning the high-strength steel wire in the sound barrier unit plate, that is, two rows of holes are reserved on the end plates at both ends of the steel formwork, and the high-strength steel wires with threads at both ends pass through the holes in the end plate of the steel formwork, and tightened with a torque wrench The high-strength steel wire is stretched in the form of a nut to apply prestress to the reactive powder concrete. The invention improves the rigidity of the sound barrier unit plate, improves the crack resistance, controls the generation and development of cracks, achieves better sound absorption and sound insulation effect, and improves the durability of the unit plate.

Description

technical field [0001] The invention relates to a manufacturing method of a prestressed sound barrier unit plate, in particular to a manufacturing method of an active powder concrete sound barrier unit plate applied along a high-speed railway. Background technique [0002] The existing active powder concrete sound barrier unit panels are prone to cracks under various loads, especially during transportation and under the action of train aerodynamic wind pressure, which cannot achieve the required sound absorption and sound insulation effect ; The aerodynamic wind pressure generated by high-speed trains running at high speed is a cyclic load. The existing sound barrier unit panels have insufficient fatigue resistance, which can easily cause unit panels to be damaged in advance, and even endanger the driving safety of the train. [0003] Therefore, in order to achieve a good sound-absorbing and sound-insulating effect and improve the durability of the unit plate, it is particul...

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Problems solved by technology

[0002] The existing active powder concrete sound barrier unit panels are prone to cracks under various loads, especially during transportation and under the action of train aerodynamic wind pressure, which cannot achieve the required sound absorption and sound insulation effect ; The aerodynamic wind pressure generated by high-speed trains is a cyclic load, and the existing sound barrier unit panels are insufficient in fatigue resistance, which can easily cause the unit panels to be damaged in advance, and even endanger the safety of the train.

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