Treating method for descending of water level of channel on downstream near-dam section of ship lock in inland river

Abstract

The invention discloses a treating method for descending of water level of a channel on a downstream near-dam section of a ship lock in an inland river. A closure dam is arranged in a non-navigation branch channel on the right side; an open channel and banked-up dams are arranged in a navigation branch channel on the left side; the open channel is arranged along a mainstream direction and has a trapezoidal cross section; the open channel comprises the channel; guide walls are symmetrically arranged on the two sides of the channel; side slopes are arranged between the channel and the guide walls; the length of the open channel, the width of the open channel, the bottom elevation of the channel and the top elevation of the guide walls are adjusted according to a planar two-dimension water flow mathematic model till the tail-bay water level of the ship lock and the water depth along the cross section of the channel both meet the design requirements; a banked-up dams is respectively arranged on each of the two sides of a headwork of the open channel; the banked-up dams and the headwork of the open channel are connected with the near-shore area; and the top elevation of the banked-up dams is as same as the top elevation of the open channel. According to the invention, the water level of the downstream near-dam section and the channel water depth are increased, and meanwhile, the bad water flow regime is prevented from generating in the open channel and the treatment for the descending of water level on the downstream near-dam section of the ship lock in the inland river is realized with low cost.

Description

technical field [0001] The invention belongs to the waterway regulation technology, and relates to a method for regulating water level drop in a waterway, in particular to a method for regulating water level drop in a channel near a dam section downstream of an inland river ship lock. Background technique [0002] Affected by the discharge of clear water and illegal mining of river sand, the water level generally drops downstream of the hub. The water level downstream of the ship lock is often lower than the design minimum navigable water level, which affects the normal operation of the ship lock. The river section is also usually accompanied by the problem of insufficient water depth of the channel. Restricted by factors such as hub storage capacity and river channel flow, most hubs cannot raise the downstream water level and increase the water depth of the channel by increasing the shipping base flow. The purpose of controlling the drop in the water level downstream of th...

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Problems solved by technology

[0003] At present, spur dams, submerged dams and other renovation structures are generally used to control the drop in water level. Open channels are mostly used for navigation during the diversion period of cofferdam construction, and there are few studies on them as Yongshui structures. Use less open channels to solve the problem of water level drop in waterways

However, spur dams and submerged dams also have some deficiencies when the water level of the waterway drops. For example, when the number of remediation buildings is small, the capacity of Yongshui is insufficient, and the remediation effect is limited; more difficult

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