Method for quantitatively controlling water leakage of seasonal water delivery open channel slope in cold region

A quantitative control and seasonal technology, applied to water supply devices, waterway systems, artificial waterways, etc., can solve problems such as increased loss along the way, waste of water resources, limited degree of channel operation safety, etc., and achieve the effect of improving operational stability

Pending Publication Date: 2022-06-03
新疆额尔齐斯河投资开发(集团)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When natural longitudinal slopes are used for drainage, the artesian flow rate in the vertical drainage pipes is relatively low, and the foundation soil properties of hundreds of kilometers of canals are different, and the drainage pipes in unfavorable geological sections are prone to crystallization and blockage, resulting in a decrease in drainage efficiency
Second, the waste of water resources
Usually, the seepage water of the filling channel is discharged directly into the outside of the embankment after being discharged by gravity drainage, and the seepage water is not used. However, the excavation channel needs to be arranged with longer horizontal pipes for external drainage, which in disguise increases the loss
Third, t

Method used

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  • Method for quantitatively controlling water leakage of seasonal water delivery open channel slope in cold region
  • Method for quantitatively controlling water leakage of seasonal water delivery open channel slope in cold region
  • Method for quantitatively controlling water leakage of seasonal water delivery open channel slope in cold region

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] Based on the idea of ​​"dynamic balance" of seepage water control, a comprehensive measure to control the seepage water of seasonal open channel slopes, including the following steps:

[0035] 1. For a specific project of a water conveyance open channel where vertical and horizontal drainage pipes have been installed, set up a number of water collecting wells on the outside of the canal embankment. Connect to horizontal drain.

[0036] Among them, the spacing of the catchment wells is determined based on the following formula:

[0037]

[0038] Among them, L is the spacing of the water collecting wells, D is the diameter of the longitudinal drainage pipe, i is the gradient of the longitudinal drainage pipe, k is the permeability coefficient, h is the buried depth of the longitudinal drainage pipe, H is the water depth of the channel, and n is the pipe roughness .

[0039] 2. A pump is installed at the connection between the water collection well...

Example Embodiment

[0050] Example 2

[0051] Now relying on the main trunk canal of a long-distance water supply project in the northwest region, the specific example of the present invention will be further elaborated.

[0052] The project is located in the northern Xinjiang region. The length of the project along the line is more than 100km. The cross section is traditional trapezoid. The lining is manually laid with prefabricated hexagonal blocks. The “one cloth and one membrane” anti-seepage is laid under the lining, and the thickness of the mortar cushion under the membrane is 30cm. The channel is open to water in late April and shut off in early October every year. The vertical and horizontal drainage pipes of the channel are set up along the line. According to the method of the present invention, a batch of water collecting wells are arranged within 50m outside the horse road at the top of the canal. figure 1 shown. Both cut channels and fill channels are applicable.

[0053] Determin...

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Abstract

The invention provides a method for quantitatively controlling water leakage of a seasonal water delivery open channel slope in a cold region. A plurality of water collecting wells are arranged in a water delivery open channel provided with longitudinal and transverse drainage pipes in the channel trend, the distance between the water collecting wells is determined according to the seepage collection flow and pumping displacement balance principle, the water collecting wells are communicated with the transverse drainage pipes, a submersible pump is placed to conduct continuous pumping drainage operation on leakage water in the transverse drainage pipes of the channel, and meanwhile a pumping drainage flowmeter is installed; and a post-membrane water level observation pipe is buried between the water collecting wells to obtain post-membrane water level data. And a fitting model of the post-membrane water level, the channel operation water level and the water-collecting well pumping displacement is constructed based on the obtained data, the optimal daytime pumping displacement of the water-collecting well in different periods is determined by combining the post-membrane water level threshold, the operation period water level and the fitting model which enable the slope to be stable, and water pumping operation is conducted based on the determined optimal daytime pumping displacement. From the perspective of disaster reduction, an accurate and quantitative solution is provided for improving the operation safety of the channel engineering.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering and long-distance water diversion and diversion engineering, and particularly relates to a method for quantitatively controlling the seepage of the slope of a seasonal open channel for water conveyance in cold regions. Background technique [0002] Most of the long-distance water diversion and diversion projects with open canals as the main structures have the phenomenon of water seepage in the canal embankments, resulting in water safety problems such as lining cracks, canal bottom uplift, and canal embankment collapse. On the other hand, due to the severe climate constraints, the open water canals in the northern region often only operate in spring and autumn each year, and there is no water in the canals in winter. Therefore, in addition to water seepage in these channels, the dikes will experience A significant water level rise-fall process, from an engineering point of v...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F17/11E03F5/22E03F5/10E02B5/00G06F113/14G06F119/14
CPCG06F30/23G06F17/11E02B5/00E03F5/10E03F5/22G06F2119/14G06F2113/14Y02A30/60
Inventor 张晨徐虎城王羿全勇威韩迅仇巅朱洵赵多明章再兴赵向波文震宇郭剑索兴祥
Owner 新疆额尔齐斯河投资开发(集团)有限公司
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