Drainage type composite board

Abstract

The invention discloses a drainage type composite board. The drainage type composite board comprises a geotechnical cloth layer and an inverted filter layer which are sequentially arranged, the inverted filter layer is arranged on the inner side of the geotechnical cloth layer, the drainage type composite board further comprises a buffer layer and / or a heat preservation layer arranged on the inner side of the inverted filter layer, and all the layers are connected in a viscous connection mode or an extrusion connection mode or a riveting connection mode or a sewing connection mode. The structure can be integrally produced and completed in a factory, the production process is simple, convenient and feasible, site construction procedures and construction difficulty are reduced, and application and popularization are facilitated; and the functions of preventing and draining water, preserving heat and adapting to expansion upwarp deformation and settlement deformation can be achieved.

Description

technical field [0001] The invention relates to the technical field of roadbed waterproof and drainage, in particular to a drainage type composite board. Background technique [0002] As the foundation of railway tracks and highways, the roadbed's smoothness, uniformity and long-term stability are crucial to ensure the safe operation of high-speed trains. In seasonally frozen soil regions, frost heave and thaw settlement are one of the key factors that lead to the decline of subgrade smoothness and long-term stability, and the uneven deformation caused by subgrade frost heave and thaw settlement will greatly affect the track structure. Ride comfort and durability have become one of the major hidden dangers that affect the speed and safety of railway operations, and also cause great difficulties for railway maintenance. [0003] As a worldwide problem, the anti-frost heave problem of subgrade in seasonally frozen soil areas has always been highly valued and concerned by the ...

AI Technical Summary

Problems solved by technology

At present, cement-based materials or plastic drainage boards are generally used for waterproof sealing of high-speed railway subgrades. However, there are a large number of structural joints in cement-based materials, and some severe cold sections have waterproof failures that cause freezing damage, and most of them are single-layer or multi-layer structures with thin thickness. , which is not enough to build an active three-dimensional drainage structure; while the construction of plastic drainage boards is difficult to splice and overlap the drainage boards, and it is easy to cause damage to the drainage boards during the construction process, seriously affecting the overall waterproof and drainage functions, and causing safety hazards to railway operations. It is difficult to control the expansion and deformation of structures built in expansive soil areas, which will affect the service safety of culverts and retaining walls in severe cases

Images