CN108286273A - Rivers adopt sandstone Technology design - Google Patents

Abstract

The technology design is using river bed longitudinal slope than drop synergistic effect, sandstone are inhaled in inverted-siphon, if the people of sandstone is also adopted than 10 ‰ or more drop in rivers bed longitudinal slope, you see 500 toward upstream again, a km ... be there sight in one's power, to you the location of be the true highly desirable height difference of one of dykes and dams, only it need to compress and eliminate and overcome this segment distance obstacle, it is laid with a suction pipe to be connected to both ends, with inverted-siphon principle, sandstone is inhaled on riverbank to come.Siphon principle or inverted-siphon principle inhale sandstone, and suction pipe both ends height difference is smaller, and negative pressure is smaller in pipe, and water, the sandstone flow rate of suction are small, and water, sandstone are slowly sucked out and are easy to block suction pipe.Suction pipe both ends height difference is bigger, and negative pressure is bigger in pipe, and water, the sandstone flow rate of suction are bigger, form huge frictional force in pipe, cause to be seriously worn to suction pipe inner wall, influence service life, and suction pipe both ends height difference should be controlled at three meters or more, six meters or less.

Description

Rivers adopt sandstone Technology design

It is existing to adopt husky technology diesel engine strand suction pumping sandstone, rivers (this paper abbreviations river) bed bottom together with water band sandstone It takes out aboard ship or on the bank, the water sandstone that flow away leave.Diesel engine pumping sandstone fuel consumption is big, serious to wear and tear in machines, and needs people Work is not parked in the agitation of riverbed bottom, and maximum can smoke the stone of 30mm.River levee dam water surface height difference up and down can also be utilized, using siphon Principle is blocked with the low one end of suction pipe and fills water, and high one end is placed on riverbed bottom on river levee dam, then blocking low one end It unlocks, the drop gravity of water makes suction pipe form negative pressure, and Lian Shui is inhaled with sandstone on the ship under dykes and dams or on riverbank, same water The sandstone that flow away stay.But existing river levee dam is generally relatively low, and height difference only has two or three meter, and in more rare, some rivers tens Or kilometers up to a hundred, also without together, excessively relying on existing specific resources.It is used to adopt sand if it is the great engineering of one of dykes and dams is built Stone seems unrealistic, is tantamount to cut the suitable shoe of foot.Modern large size dykes and dams height integrates flood control, irrigation, power generation, and has excretion Silt function.

This technology design using bed longitudinal slope than drop (general with ‰ than being subject to the water surface) synergistic effect, if riverbed is indulged Slope has 10 ‰ or more than drop, as soon as prolong km toward river upstream from the heap sand of riverbank, upstream and downstream height difference have ten meters or more together Stealthy dykes and dams.Sandstone are inhaled with inverted-siphon principle, if having five meters high of drop potential energy with the big suction pipes of diameter 100mm, more than 20 Horsepower diesel suction adds five meters of height of lift, the flow rate of maximum horsepower that 50mm stones below can be sucked out completely, is this The ideal height difference that Technology design needs, such river I be in border it is more, appear in high area above sea level, flow asthma Anxious, the shallow unsuitable navigation of water belongs to ephemeral stream, and dry season is water-saving less.

Suction pipe installation is laid with selection in dry season, adopts the selection of sandstone mouth in the wider flow in riverbed compared with unwinding position, such river Duan Rongyi deposits sandstone, and suction pipe is laid on riverbed side bottom, do not expose the surface as possible, at interval of five meters with timber banding fixed, One meter of riverbed is preferably embedded in hereinafter, flood season flood is avoided to wash away, suction pipe is using steel pipe, iron pipe, high-quality plastics pipe, diameter 100mm to 200mm is advisable, and ten meters or more of steel wire rubber tube of pipette tip can adjust and inhale sandstone position up and down, and Filtering sandstone cover is loaded onto, prevents big stone or sundries from entering, the stone of certain specification can be allowed to enter suction pipe, water is borrowed in exit Impulse force with drum screen screen separation sandstone, suction pipe require certain degree of hardness, avoid siphon formed negative pressure so that suction pipe is collapsed, connector is close Envelope property is good, such as enters water or air, influences to inhale sandstone efficiency.It inhales sandstone and does not need suction pipe water or other auxiliary machinery, only It wants there is water to have sandstone in river, can ceaselessly be exploited regardless of season day and night.

Sandstone are the indispensable auxiliary materials of modern construction concrete, and not being every river has sandstone, to see its stream The geological state in domain, if China Yellow River basin area is based on yellow sand and loess, the silt clay content weight in riverbed, also just like red Layer sedimentary rock, with rain drop erosion to riverbed is all mud after weathering, without extraction value.As deposited sandstone or volcano formation After the weathering such as granite, medical stone, dolomite, limestone, sandstone in riverbed are washed into, universal content mud is few, relatively cleaner, is Ideal concrete auxiliary material.

Claims (1)

1. adopting sandstone using the technology design, if selecting different river bed longitudinal slopes than ‰ ratio of drop, change tubing length, laying side Method, straw diameter size, suction pipe both ends height difference, this item skill design motif design do not change.