Throwing material for lightening interception difficulty and protecting dikes of rivers

Abstract

The invention discloses a throwing material for lightening interception difficulty and protecting dikes of rivers. The throwing material is a cylindrical line throwing material, the throwing material is provided with a lateral punched hole, rough ribs are arranged at the outer side of the cylinder, the incident flow end of the solid cylindrical line throwing material is provided with a streamline conical head, and the incident flow end of the hollow cylindrical line throwing material is provided with a thin-wall sharp edge. After the cylindrical line throwing material is thrown along the flow from the dike head at the difficult interception section of a cofferdam, the throwing material rolls around a shaft to the bottom of a slope; the throwing material reaches the deep groove part of a closure gap more easily compared with other bulk materials for intercepting the flow by means of sliding; the material has strong underwater impact resistance and low loss, can protect the dike from collapsing, and has the effect of obviously reducing the interception difficulty; and the throwing material can also be used for dike protection of rivers and slope protection and dike protection of reservoir earth and rockfill dams.

Description

technical field [0001] The invention relates to a throwing material for closure construction of water conservancy and hydropower projects, in particular to a throwing material for reducing the difficulty of closure and being used for embankment protection of rivers. Background technique [0002] For the construction of water conservancy projects across rivers, in order to ensure that the construction can be carried out on dry land during the construction period, it is necessary to build cofferdams in advance to cut off the water flow and then form foundation pits. Use earth-rock cofferdams to cut off deep water and fast-flowing rivers. During the closure process of the Shunai Longkou, the water flow is turbulent, the underwater terrain and the shape of the embankment are constantly changing, and various dangers may occur at any time. In this case, it is necessary to There are huge difficulties and risks in gaining time to rush to build the closure embankment. The main diffi...

AI Technical Summary

Problems solved by technology

The closure test and practice show that the effect of throwing concrete tetrahedron or steel mesh gabion in the difficult section of closure is not ideal

[0004] Studies have shown that the main reason for the collapse of the embankment is that the throwing materials cannot be placed in place at one time, and the main reason for the loss of throwing materials is the lack of stability of the materials

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