Long-distance sand transportation silt construction method and equipment

Abstract

The invention belongs to the technical field of water channel construction, and in particular, discloses a long-distance sand transportation silt construction method and equipment. The method comprises the process of: paying-off positioning-positioning of a sand pumping ship-installation of a sand transportation pipe-installation of a feeder pump-installation of a sand measurement valve-installation of a pressure gauge-installation of a cavitation prevention device on the feeder pump-installation of a leveling valve-starting of the sand pumping ship to pump sand-observation of sand content data and analysis-selective opening of the cavitation prevention device, adjustment of rotating speeds of the sand pumping pump and the feeder pump and change of a silt construction direction. The method is convenient to operate, high in efficiency and low in cost.

Description

technical field [0001] The invention belongs to the technical field of waterway construction, and in particular relates to a method and equipment for long-distance sand transportation and silting construction. Background technique [0002] The construction technology of silt discharge and dike reinforcement is the main technology of embankment reinforcement in the lower reaches of the Yellow River, and this technology has been widely used in the construction process of embankment back reinforcement. In the silt discharge construction in recent years, because the borrow area is usually far away from the silt filling site, long-distance sand pipelines are often used for construction, and one-stage or multi-stage pumping stations are used for pressurization in the middle, and finally the sand is transported to Silt filling parts. Due to the existence of many construction equipment such as long-distance sand pipelines, sand pumps, and one-stage (or multi-stage) pumping stations...

AI Technical Summary

Problems solved by technology

Due to the existence of many construction equipment such as long-distance sand pipelines, sand pumps, and one-stage (or multi-stage) pumping stations, as well as the influence of many factors such as human operation skills and proficiency, partial rupture of pipelines, relay pumps, etc. Problems such as cavitation and large flatness errors in silted areas have seriously affected the construction progress and greatly reduced the construction benefits

[0003] During the construction process, the sediment content of the transported mud is a very important factor affecting the normal operation of the whole system. In the past, the mud and sediment content was mainly judged qualitatively based on the experience of the construction personnel. Quantitative detection was not possible, and the accuracy was very poor. , and it is impossible to monitor the sediment content of the transported mud in real time

When the sand transportation distance exceeds 6 kilometers, if the sand content of the transported mud cannot be accurately grasped in time, it will cause pipeline blockage or low construction efficiency. When the transported mud has a large sand content, the transportation distance and Pipeline blockage is prone to occur due to changes in conveying pressure; when the conveying mud has a small sand content, the amount of mud transported per unit time is reduced, resulting in lower work efficiency, increased construction costs, and poor construction benefits

At the same time, due to the long distance of silting and sand transportation, the pipeline needs to bear a lot of working pressure. During the construction process, the sand transportation pipeline often occurs partial cracking and damage, resulting in downtime for maintenance, which increases downtime and maintenance costs.

[0004] It has been found from many years of construction practice that the cavitation problem of the relay pump is serious, which accelerates the wear of the pump casing and impeller, resulting in increased vibration, loud noise, and pressure and flow pulsation of the centrifugal pump.

When the silt filling of many projects is about to be completed, there is a problem of flatness control in the silt area. There is a large difference in the height difference of the silt fill, and it takes a lot of man-hours to level the roof; the work efficiency is reduced, and the impact construction progress

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