The method of using siphon construction diversion pipe to make the construction conditions of river dry land
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A construction diversion and siphon technology, applied in water conservancy projects, water conservancy engineering equipment, instruments, etc., can solve problems such as hidden dangers of river flooding, long construction period, and reduced project investment
Active Publication Date: 2020-11-06
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 siphon type construction diversion pipe to manufacture the construction condition of dry river course, in order to effectively reduce engineering investment, simplify the manufacturing method of construction condition of dry river course, at the same time avoid causing flood safety hidden danger, Manufacture the construction conditions of river dry land in a more environmentally friendly way to 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 using a siphon-type construction diversion pipe to manufacture dry river construction conditions, the steps are as follows: record the river area where the construction conditions for river dry land are to be manufactured as the construction dry area, and the construction dry area is located at the water retaining area of the river Downstream of the building; determine the backwater area downstream of the construction dry area, and the back water area is adjacent to the construction dry area; install a siphon construction at the water-retaining building to transport the water upstream of the water-retaining building to the downstream of the backwater area Diversion pipe: Create a vacuum condition for the siphon construction diversion pipe to transport the water in front of the water-retaining building to the downstream of the backwater area through the siphon construction diversion pipe. When the water in the target area flows out of the target area, the construction The dry area forms the construction conditions of river dry land. The method can significantly reduce the project investment, simplify the manufacturing operation of the construction conditions of the river dry land, avoid the hidden danger of flooding, and has the characteristics 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 using a siphon-type construction diversion pipe to manufacture construction conditions for river dry land, and is suitable for engineering situations where construction conditions for river dry land need to be manufactured downstream of river channel water retaining structures. 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 residu...
Claims
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Application Information
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