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

A construction method and seasonal technology, applied in the field of highway subgrade structure and construction in new soft soil seasonal frozen soil area, can solve problems such as poor frost resistance, reduce additional stress, reduce changes in water content, and weaken settlement problems Effect

Pending Publication Date: 2018-03-02
GUYUAN CHENTONG TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of poor frost resistance in the existing soft-soil road subgrade structure, the present invention provides a new type of soft-soil subgrade road subgrade structure in seasonal frozen soil areas, which can effectively protect road subgrades in soft soil areas and seasonal frozen soil areas. , and easy to construct

Method used

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

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a new road subgrade structure in soft ground and seasonal frozen soil areas includes a waterproof layer 1 and a gravel layer 2 arranged sequentially from bottom to top. The waterproof layer 1 is composed of waterproof geotextiles, and the waterproof layer 1 plays The effect of water isolation reduces the change of the water content of the foundation soil at the lower part of the subgrade structure, because the change of the water content will change the force between the soil particles, and a certain deformation will occur; the thickness of the crushed stone layer 2 is 5cm, and the crushed stone layer 2 The particle size is not more than 0.5cm, and the gravel layer 2 plays the role of drainage. When the temperature rises, the ice and snow melt or there is rainfall, the water generated in the roadbed will penetrate into the waterproof geotextile through the gravel layer 2, because The waterproof geotextile is waterproof, so the water will flow ...

Embodiment 2

[0033] Such as figure 1As shown, a new road subgrade structure in soft ground and seasonal frozen soil areas includes a waterproof layer 1 and a gravel layer 2 arranged sequentially from bottom to top. The waterproof layer 1 is composed of waterproof geotextiles, and the waterproof layer 1 plays The effect of water isolation reduces the change of the water content of the foundation soil at the lower part of the roadbed structure, because the change of water content will change the force between the soil particles, and a certain deformation will occur; the thickness of the crushed stone layer 2 is 4cm, and the crushed stone layer 2 The particle size is not more than 0.5cm, and the gravel layer 2 plays the role of drainage. When the temperature rises, the ice and snow melt or there is rainfall, the water generated in the roadbed will penetrate into the waterproof geotextile through the gravel layer 2, because The waterproof geotextile is waterproof, so the water will flow away t...

Embodiment 3

[0037] Such as figure 1 As shown, a new road subgrade structure in soft ground and seasonal frozen soil areas includes a waterproof layer 1 and a gravel layer 2 arranged sequentially from bottom to top. The waterproof layer 1 is composed of waterproof geotextiles, and the waterproof layer 1 plays The effect of water isolation reduces the change of the water content of the foundation soil at the lower part of the subgrade structure, because the change of the water content will change the force between the soil particles, and a certain deformation will occur; the thickness of the crushed stone layer 2 is 6cm, and the crushed stone layer 2 The particle size is not more than 0.5cm, and the gravel layer 2 plays the role of drainage. When the temperature rises, the ice and snow melt or there is rainfall, the water generated in the roadbed will penetrate into the waterproof geotextile through the gravel layer 2, because The waterproof geotextile is waterproof, so the water will flow ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/06
CPCE01C3/00E01C3/06Y02A30/60
Inventor 苏谦赵文辉
Owner GUYUAN CHENTONG TECH DEV CO LTD
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