Method for treating Feng river by using hydraulic steel dam gate

Abstract

The invention discloses a method for treating Feng river by using a hydraulic steel dam gate. By combining meteorological, hydrographic and geological conditions of Feng river basin, the invention introduces an application of the hydraulic steel dam gate in a Feng river watercourse comprehensive renovation project. Compared with a traditional regulating dam (barrage), the hydraulic steel dam gatehas the characteristics that the dam span is large, the flow capacity is high, no upstream sediment accumulation is generated, the dam rising and falling speed is high, the flow adjusting is convenient, watercourse floating object blockage is avoided and so on; and the advantage of the hydraulic steel dam gate in urban watercourse comprehensive treatment and construction is sufficiently shown.

Description

technical field [0001] The invention relates to a method for controlling the Feng River by using a hydraulic steel dam gate. Background technique [0002] The Phase II Fenghe Comprehensive Management Project in Xicheng New District, Shaanxi Province is located in the middle of the Qinling Piedmont Pluvial Plain on the south bank of the Weihe River. It belongs to the mid-latitude warm temperate semi-humid continental monsoon climate zone. The annual average precipitation in the basin is 806.6mm, and the temporal and spatial distribution is uneven. 7. August and September account for more than 50% of the annual precipitation. The width of the river bed and floodplain of this section of Fenghe River is narrow at the top and wide at the bottom, and terraces at all levels of rivers on both sides are intermittently developed. The riverbed is mainly medium-coarse sand, with a relatively large average permeability coefficient of about 6.91m / d, and the thickness of the aquifer is la...

AI Technical Summary

Problems solved by technology

The barrage scheme needs to be equipped with porous flat or curved gates, which have high reliability, large engineering investment, and a large water blocking area, which raises the flood level of the upstream river section and increases embankment investment; the construction of rolling dams is simple, but the riverbed above the dam will Gradually silt up, thus losing the function of water storage, and causing the flood level to rise, which will lead to a significant increase in investment in flood control projects in the upstream; rubber dams are widely used in flood control, irrigation and urban beautification, with convenient management, beautiful landscape, and dams during flood discharge. The surface is completely collapsed, which is beneficial to the flood discharge of the river and significantly reduces the investment in upstream flood control projects. The normal service life is about 20 years, but the dam bag is easily damaged by impact objects. The coarse sand in the water will wear the dam bag during flood discharge. The time is long, which brings great difficulties to the joint dispatch of multiple dams on the river; the hydraulic automatic control flap gate has the advantages of strong flow capacity, convenient manufacture, and convenient management, but the flap gate is easy to be jammed by floating objects or upstream mud and sand Sedimentation makes it difficult to turn over the plate automatically, which affects flood control safety and other issues

It takes about 30-50 minutes for the air shield dam to lift the dam, but because the inflatable bag needs to be imported from abroad, the project cost is high, and the later maintenance period is longer and the cost is higher