Novel soft soil quality seasonal frozen soil area highway subgrade structure and construction method

Abstract

The invention discloses a novel soft soil quality seasonal frozen soil area highway subgrade structure and a construction method, which can be used for solving problems of frost heaving and sedimentation of building highway subgrades in soft soil areas. The novel soft soil quality seasonal frozen soil area highway subgrade structure mainly comprises a waterproof layer, a rubble layer, a lightweight concrete layer, a pavement structure layer and a backfill soil slope layer as a main body structure. The novel soft soil quality seasonal frozen soil area highway subgrade structure not only can utilize characteristics of low heat conduction, anti-freezing property, light weight and so on of a lightweight concrete material but also can use the rubble layer as a drainage layer and waterproof geotextile as a water-resisting layer to form an integral structure; good freeze-melt resistance during a low temperature effect is guaranteed; and moreover, as the lightweight concrete layer and the pavement structure layer form a good integral stressed structural layer, the additional stress is reduced and the sedimentation problem is weakened.

Description

technical field

[0001] The invention relates to the problem of road subgrade structure, especially for the problem of frost heaving in soft soil areas, and provides a novel road subgrade structure and construction method in soft soil geological seasonal frozen soil areas. Background technique

[0002] With the development of society and the continuous improvement of national planning, the total mileage of national highway construction is increasing, and the road network is also constantly improving. It is inevitable that we will encounter the situation of building roads in seasonal frozen soil areas with soft soil. , the active layer of soft soil will freeze or thaw every year. For the road subgrade structure of soft soil, there is not only the problem of poor frost resistance, but also the problem of large settlement due to the high density of roadbed materials.

[0003] Therefore, how to solve the problem of poor frost resistance in the road subgrade structure of soft soil...

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