Sediment storage dam covered with geogrid reinforced cement modified soil and construction method of sediment storage dam

Abstract

The invention relates to a sediment storage dam covered with geogrid reinforced cement modified soil and a construction method of the sediment storage dam. A dam body of the sediment storage dam comprises a filling core formed by filling and compacting granite residual soil and a cover layer for wrapping the filling core, and the cover layer is formed by superposing cement modified soil wrapped by geogrids. The cement modified granite residual soil is used as a main building material, and a corresponding damming construction method is combined, so that the construction speed is increased, meanwhile, the construction cost and difficulty of the sediment storage dam are greatly reduced, and the sediment storage dam covered with the geogrid reinforced cement modified soil has the remarkable advantages such as simplicity in construction, high construction speed, low cost and high scour resistance and is particularly suitable for controlling granite collapse.

Description

technical field [0001] The invention relates to a sand dam structure, in particular to a sand dam covered with geogrid reinforced cement modified soil and a construction method thereof. Background technique [0002] Collapse is a common soil erosion disaster in tropical granite regions. Under the action of heavy rain and torrential rain, small dilute sediment flow disasters often occur in gullies in the collapsed hillock area. The sediment washes away the slopes and directly silts the cultivated land, farmland, ditches and road facilities in the gully exit area, endangering farmland, Orchards, water conservancy and transportation facilities. Sand dam refers to the retaining structure in the ditch with the main purpose of retaining the solid matter in the torrent and debris flow. [0003] Gravity dams are commonly used in collapsing hillock control, and they can be divided into earth dams, dry masonry dams, mortar masonry dams, and earth-rock mixed dams. However, for the c...

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Problems solved by technology

However, for the collapsing control in the area of ​​granite residual soil, since the granite residual soil is mainly sand-grained soil, the earth dam cannot directly use the granite residual soil as the soil material for dam construction, and a large amount of clayey soil needs to be transported outside, which makes the use of earth dams difficult. Becomes uneconomical as a sand dam

In addition, when building a sand-retaining dam with a height greater than 10m, the design width of the earth dam becomes very large, which greatly reduces the storage capacity and affects the sand-retaining benefit of the earth dam; The type requires a large amount of stone materials, and the construction is difficult, time-consuming and labor-intensive, and requires a lot of labor wages, resulting in higher construction costs for this type of sand control dam than earth dams

At present, the high cost of treatment and the difficulty of construction are the main reasons why it is difficult to use engineering methods to control the collapse of most granite areas in my country.

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