Method for manufacturing river channel dry land construction conditions by using flow self-adjusting siphoning type construction flow guide pipe
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A construction diversion and siphon technology, applied in water conservancy projects, water conservancy engineering equipment, special data processing applications, etc., can solve the problems of long construction period, hidden dangers of river flood safety, and high construction and demolition costs.
Active Publication Date: 2019-10-25
SICHUAN UNIV
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[0003] In view of the existing technology, the construction and demolition cost is too high, the construction period is long, and the river channel is occupied by waste residue to create the construction conditions of the dry land of the river channel by building the construction cofferdam. Insufficient influence, the present invention provides a kind of method that utilizes flow self-adjusting siphon construction diversion hose to manufacture the construction condition of river course dry land, in order to effectively reduce engineering investment, simplify the manufacturing method of river course dry land construction condition, at the same time avoid causing traffic accidents. Flood safety hazards, create river dry land construction conditions in a more environmentally friendly way, and avoid adverse effects on river water quality and river bank environment
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Embodiment 1
[0143] This embodiment takes a certain river channel in Chengdu City, Sichuan Province as an example to illustrate the method of using the flow self-adjusting siphon construction diversion pipe to manufacture the construction conditions of the dry land of the river channel provided by the present invention. In this embodiment, the schematic diagram of the layout of the siphon construction guide pipe is as follows Figure 1~2 shown.
[0144] It is planned to build a small bridge 300m downstream of a rubber dam (rubber dam is a specific water-retaining structure) in the river. The rubber dam is 3m high. The basic information of the river is shown in Table 1.
[0145] Table 1 Basic data table of river course
[0146] Channel width B(m) Channel roughness n River slope J 80 0.025 0.8‰
[0147] In the following calculations, the elevation data are all based on the horizontal plane at the end of the downstream river, that is, the riverbed at the end of the o...
Embodiment 2
[0271] In this embodiment, the engineering conditions involved are the same as in Embodiment 1, and the construction conditions of the dry river course are manufactured in the same way as in Embodiment 1, except that the diameter of the siphon construction diversion pipe used is 1.5m. , that is, the inner diameters of the hard pipe, the water delivery hose and the water outlet elbow used in this embodiment are equal to 1.5m.
[0272] Adopt the method identical with embodiment 1, each parameter that calculates is as follows:
[0273] The length of the water hose l 2 =1175m;
[0274] Inlet elevation H of siphon construction diversion pipe 3 =1.14m;
[0275] The outlet elevation H of the siphon construction diversion pipe 4 =1.44m;
[0276] The installation elevation H of the siphon construction diversion pipe A : 3.94m≤H A ≤8.00m;
[0277] The necessary installation quantity of siphon construction diversion pipe m=14;
[0278] In this embodiment, M=m=14.
[0279] In th...
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Abstract
The invention provides a method for manufacturing river channel dry land construction conditions by using a flow self-adjusting siphoning type construction flow guide pipe, which comprises the following steps of: marking a river channel area of the river channel dry land construction conditions to be manufactured as a construction drying area which is positioned at the downstream of a water retaining building of a river channel; determining a water return area at the downstream of the construction drying area, wherein the water return area is adjacent to the construction drying area; installing a siphoning type construction flow guide pipe used for conveying water on the upstream of the water retaining building to the downstream of the water return area at the water retaining building; andcreating a vacuum condition for the siphoning type construction flow guide pipe so that water in front of the water retaining building can be conveyed to the downstream of the water return area through the siphoning type construction flow guide pipe, and when water in the target area flows out of the target area, forming a riverway dry land construction condition in the construction drying area.The method can significantly reduce the engineering investment, simplify the manufacturing operation of river dry land construction conditions, avoid the hidden danger of flood discharge, and also has the characteristic of being more environmentally friendly.
Description
technical field [0001] The invention belongs to the field of water conservancy engineering, and relates to a method for manufacturing river dry land construction conditions by using a flow self-adjusting siphon construction diversion hose. Background technique [0002] When constructing on the river, the conventional solution is to build the construction cofferdam to create the dry land conditions required for construction, and then remove the construction cofferdam after the project is completed. Construction of cofferdam construction requires high investment and long construction period, which often becomes a restrictive factor for engineering construction in urban rivers. After the completion of the construction, cleaning up the materials used to build the construction cofferdam, such as waste rocks and waste residues, not only requires a lot of manpower and financial resources, but also causes inconvenience to residents on both sides of the strait and adversely affects t...
Claims
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