Red sandstone subgrade filling structure used in rainy area and construction method of same

Abstract

In one embodiment, a red sandstone subgrade filling structure used in a rainy area and a construction method of same are provided. The construction method employs red sandstone earthwork, cement, waterproofing geotechnical cloths, edge-covering cohesive soil, and a subgrade construction mechanical device. Three layers of waterproofing geotechnical cloths are respectively arranged on the bottom ofthe subgrade, on the bottom of the roadbed, and on the top of the roadbed. Subgrade slopes are coated by the edge-covering cohesive soil. Embankments are formed with the red sandstone via layered filling. The roadbed is processed by cement mixed with ash. The method not only effectively protects the stability of the red sandstone, but also guarantees quality and security. The structure is economical and environment-friendly when being used in a south rainy red sandstone area where soil is difficult to fetch.

Description

technical field

[0001] The invention belongs to the field of highway and municipal engineering construction, and specifically relates to a red sandstone subgrade filling and construction structure and construction method in rainy areas. Background technique

[0002] There are a large amount of red sandstone in the rainy provinces and regions in southern my country (Jiangxi, Hunan). Due to the particularity of its material itself, it is only used in a small amount as roadbed filler in low-grade highways, and a large number of quality problems have occurred. In these areas, if the red sandstone is not used as abandoned earth, it will occupy a large amount of land, and it is necessary to borrow qualified earth, which will increase a lot of investment and land acquisition. This construction method is based on the chemical and physical properties of red sandstone, the classification and characteristics of red sandstone, and then the improvement and research of construction method...

Images