Construction device and method for cross-river sand mining

Abstract

The present invention provides a cross-river sand mining construction device and method. A river-crossing pontoon bridge consisting of a plurality of pontoon bodies is provided in the river channel, and a sand delivery pipe is fixed on the pontoon bridge. One end of the sand delivery pipe is connected with a sand suction ship. The other end of the sand pipe is connected to the opposite bank. In the floating bridge body, two floating bridge boxes are fixedly connected by a plurality of connecting beams, and anchor plates for connecting anchor chains are arranged on the floating bridge box bodies. During construction, the pontoon box is made in the factory, and the two pontoon boxes are combined into a pontoon body by connecting beams on site; stone anchors are put into the river to fix the pontoon body; the connection beam pontoon bodies are fixedly connected until the entire span spans The pontoon of the river is installed; the sand delivery pipe is laid on the pontoon bridge, and the sand suction boat is connected to one end of the sand delivery pipe; through the above steps, the cross-river sand mining construction is realized. By adopting the plan of floating bridge pipe laying and cross-river sand taking, sand mining and silting can be carried out on both sides of the river at the same time, which facilitates simultaneous construction and greatly improves construction efficiency.

Description

technical field [0001] The invention relates to the field of sand extraction for silting and embankment consolidation, in particular to a cross-river sand mining construction device and method. Background technique [0002] The silt release and embankment reinforcement projects of a certain river are relatively concentrated, and the construction period is required to be short. During the construction process, if construction ships fetch sand from one side of the bank, because the equipment is denser, the radius of sand fetching will be greatly reduced, resulting in difficulties in sand fetching by sand fetching equipment, reduced construction efficiency, serious waste of effective resources, and greatly increased construction costs. Complete the construction requirements. [0003] There is no better solution in the prior art. [0004] Existing sand suction ships usually use a combination of mixing head and sand suction pipe for construction. The problem with this method is...

AI Technical Summary

Problems solved by technology

[0004] Existing sand suction ships usually use a combination of mixing head and sand suction pipe for construction. The problem with this method is that the size of the mud blocks produced by the mixing head Difficult to control, the sand content of sandy water is difficult to control, when the sand content is high, it is easy to block the sand suction pipe, and when the sand content is low, the sand suction efficiency is too low

In particular, the combined structure of the mixing head and the sand suction pipe is easy to damage the river bed and make the bottom of the river bed uneven

The existing mixing head structure is also easy to cause the raised sand to flow along the water, increasing soil erosion

Moreover, existing sand suction ships also have the problem of inconvenient maintenance and control of the sand suction head

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