Riverway drainage basin flood prevention dam construction method

Abstract

The invention relates to the technical field of dam construction, in particular to a riverway drainage basin flood prevention dam construction method. The method comprises the following steps that before concrete construction, beach protection project is conducted on the slope surface in front of a flood prevention wall, wherein the beach protection project comprises the following steps that S1, silt is removed, and the slope surface in front of the flood prevention wall is flattened; S2, paying-off positioning is conducted, the border of the slope surface is dug, and a groove is processed; S3, polypropylene filament yarn woven cloth is thrown in front of the flood prevention wall at first, then, rubble is thrown for filling, the gradient of the slope reaches 1:2.5; and S4, net bag gabionsare adopted at the toe of the slope to protect the toe, leveling of the upper portion of the thrown rubble is achieved with bagged broken stone, and the surface is protected through film-bagged concrete. Before concrete construction, the slope surface is protected through the beach protection project, the soil and water loss situation is avoided, the integrity of the slope surface is improved, and the water ecology of the slope surface is stabilized and protected from being damaged.

Description

technical field [0001] The invention relates to the technical field of dam construction, in particular to a construction method for flood control dams in river basins. Background technique [0002] my country has a vast territory and many rivers and lakes. Flooding often occurs in some river basins. People often use dikes to prevent floods. Building dikes has become the main measure to prevent flooding, protect residents and industrial and agricultural production. , the function of the embankment is to limit the flood in the flood channel, increase the water depth of the same flow rate, increase the flood velocity, and facilitate flood discharge and sediment discharge. [0003] In the prior art, in a Chinese patent document with the authorized announcement number CN104164877B, a method for underwater concrete construction at the embankment slope foot is recorded, which includes the following steps: (1) Excavating the section at the designed warehouse position, During the exc...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: directly excavate the tidal flat in front of the flood control wall, install fixed piles and fixed formwork, and then start pouring concrete. Before the construction of concrete, the tidal flat is not protected. The sediment is washed and transported with the water flow before the concrete is poured, and the excavated slope is easily damaged