A method for laying roadbed in saline soil with environmental protection effect

Abstract

The invention discloses a saline land roadbed laying method with an environment protection effect. The method comprises steps as follows: a roadbed is treated in steps as follows: digging a foundation to a certain depth, removing saline soil, filling the foundation and compacting the foundation; a thermal-insulation partition layer is laid on the upper surface of the foundation, and then a sand cushion layer A is laid, compacted and compressed; a waterproof layer A is laid on the sand cushion layer A; concrete briquettes are poured on two sides of the foundation, and the thermal-insulation partition layer, the sand cushion layer A and the waterproof layer A are pressed and fixed from two sides; a roadbed body is laid on the waterproof layer A and is compacted and compressed, the section of the roadbed body is trapezoidal, and concrete cast bank protection slops are arranged on two sides of the roadbed body; a waterproof layer B is laid on the roadbed body; prefabricated cement baffles are arranged at two ends of the top of the roadbed body, and the bottom ends of the prefabricated cement baffles are put on the bank protection slopes on the two sides of the roadbed body; a sand cushion layer B is laid on the waterproof layer B, compacted and compressed. According to the saline lad roadbed laying method, a large amount of burnt household garbage can be treated, the environment protection effect is realized, and the construction cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of road subgrade construction, in particular to a saline land subgrade laying method with environmental protection effect. Background technique [0002] Saline soil is a general term for soils with different degrees of salinization. In highway construction projects, it generally refers to the soil with an average soluble salt content greater than 0.3% in the soil within 1.0m below the surface, which is called saline soil. According to the regional distribution, saline soil is divided into coastal saline soil, inland saline soil and alluvial plain saline soil, and according to the nature of salt content, it is divided into (sub)chlorine saline soil, (sulfite) sulfuric acid saline soil, and carbonate saline soil five categories. The three-phase composition of saline soil is different from that of general soil. The liquid phase contains salt solution, and the solid phase contains crystalline salt, especially soluble cr...

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Problems solved by technology

[0003] Because saline soil has characteristics such as salt heaving and dissolution, and is highly corrosive to engineering bodies and materials, it is very difficult to build roadbeds on saline soil

At present, in the process of laying the saline soil foundation, in order to avoid problems such as softness and dissolution of the roadbed and improve the strength of the roadbed, many construction units dig out the saline soil and transport it away, and transport a large amount of soil and sand from other places to fill the foundation , which will greatly increase the construction cost and prolong the construction period

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