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Relying on the National Railway Group's scientific research project "In-depth Research on Heavy-haul Railway Technology Upgrading", the research results of "Heavy-haul Railway Microporous Polyurethane Under-rail Elastic Pad" have recently passed the technical review of 188bet Live Casino the National Railway Group。

　　Aiming at the heavy impact of Daqin heavy-haul railway freight trains on the line，The orbital geometry is difficult to maintain，The track bed is seriously hardened，The elasticity of the track structure largely depends on the conditions such as the under-rail pads，On the basis of absorbing and drawing on relevant research at home and abroad，Analysis of application scenarios of elastic pads under rails、Material selection、Structural optimization design、Stress analysis、Comprehensive research has been carried out such 188bet mobile login as fretting friction analysis，Completed the design of elastic pads under microporous polyurethane rails for heavy-duty railways。

　　The main technological innovations of this research result:One isA three-dimensional network structure macromolecular polymer prepared by using polyether polyols and isocyanates with reasonable chain lengths，Realized the optimization of the combination of soft segments and hard segments，Achieving the best degree of microphase separation，Make the backing plate have good resilience、Weather resistance and stiffness stability。Second isUsing microporous polyurethane 188bet Live Casino flat plate structure to improve the contact relationship between the elastic layer and the concrete sleeper，Reduced damage to concrete sleepers，Improved service performance。

　　Heavy-duty railway microporous polyurethane under-rail elastic pad，Utilize the three-dimensional network molecular structure of polyurethane according to a certain cross-linking density，Achieved excellent material resilience、Weather resistance and stiffness stability，Effectively improves the service life of the bottom plate of heavy-haul railways with large transport capacity，188bet login Reduced rail corrugation caused by the loss of elasticity of the backing plate、Loose fasteners、Risk of track gauge deviation and other diseases，Provides technical support for operational security。It adopts flat plate structure design，Using the micropore deformation inside the material to provide support，Increased the contact area between the pad and the concrete pillow，Effectively alleviates the problem of wear and grooving of the sleeper bearing surface，Increased service life，Reduced sleeper wear，Effectively reduces the frequency of pad replacement，Saved 188bet mobile sleeper replacement costs，Improved transportation efficiency，Has good technical and economic benefits and prospects for promotion and application。