Method for manufacturing subway vibration reduction and isolation light concrete composite ballast bed

Abstract

The invention discloses a method for manufacturing a subway vibration reduction and isolation light concrete composite ballast bed. A light concrete material is prepared from light concrete containing an EPS (Expanded Polystyrene) particle light material, stones, sand, cement and some auxiliary additives which are mixed according to a certain proportion, and related manufacturing methods are carried out by pouring a composite ballast bed by using the light concrete and realizing subway vibration reduction and isolation, so that mixed light concrete needed by the subway vibration reduction and isolation composite ballast bed is enabled to be applied to engineering, implementation of the subway vibration reduction and isolation composite ballast bed is ensured, vibration energy, which is transmitted to a lining structure of a subway, of a train can be effectively obstructed and reduced, the vibration energy can be transmitted to surrounding foundation soil masses from the lining structure, and the influence of causing additional vibration or secondary vibration on surface buildings and the foundation of the subway can be reduced. The method disclosed by the invention has an obvious vibration reduction and isolation effect.

Description

technical field [0001] The invention discloses a method for designing a lightweight concrete composite track bed for vibration reduction and vibration isolation of subways. The lightweight concrete material composition includes EPS particle lightweight materials mixed with stones, sand, cement and some additives in a certain proportion. Lightweight concrete, use this kind of lightweight concrete to pour the vibration-absorbing vibration-isolation composite track bed of subway, and carry out related design. 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 a...

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.