Lightweight concrete mixing device and mixing method for subway vibration-reducing vibration-isolation ballast bed

Abstract

The invention discloses a lightweight concrete mixing device for a subway vibration reduction and isolation road bed and a mixing method for the lightweight concrete mixing device. In the device, an EPS storage cavern (1), a centrifugal machine (2), an EPS storage bin (3), a flow meter (4) and a mixing bin (13) are sequentially connected; a water feeding hole (5), a water reducer feeding hole (6), a cement feeding hole (7), a stone feeding hole (8) and a sand feeding hole (9) are separately connected to an upper hole of the mixing bin (13) through a weightometer (12); a thichener feeding hole (10) and a polymerizing agent feeding hole (11) are separately connected to the upper hole of the mixing bin (13); a control command generator (14) is connected to a computer (15) for separately controlling feeding of each part; and a discharge hole is formed in the lower part of the mixing bin (13). Strength and quality of lightweight concrete of the subway vibration reduction and isolation road bed are ensured, practical engineering construction needs are met, a development period of special equipment is shortened, and equipment operation and investment cost is reduced.

Description

technical field [0001] The invention relates to a lightweight concrete mixing device and method, in particular to a lightweight concrete mixing device and a mixing method for a subway vibration-reducing vibration-isolation road bed. Background technique [0002] With the acceleration of my country's subway construction and the continuous increase of operating mileage, ensuring the safety of subway operation is not only an important livelihood project, but also a strategic project for urban development of green economy, which is related to everyone's travel safety. In fact, many potential safety hazards and hazards have appeared in the operation of subways in cities such as Shanghai and Nanjing, such as suspension of operation for maintenance after accumulated settlement and differential settlement seriously exceeding the standard, vibration of subway trains aggravates the danger of water seepage and mud leakage in the lining structure, and even Problems such as the surroundi...

AI Technical Summary

Problems solved by technology

No vibration-reducing measures are adopted for the foundation ballast bed in the general section of the subway project, but only vibration-reducing facilities are used in the areas where hospitals, workshops, and government agencies that require vibration reduction are located, such as floating slab ballast bed and elastic short sleeper integral ballast bed Measures such as rails and rubber pads are used to reduce vibration, but these measures are difficult to achieve good vibration reduction and isolation effects. The vibration attenuation is 6-10dB, the service life is limited, and the price is expensive.

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