Underwater unhooking method for throwing large-grain-size material in riverway closure construction

A technology with medium and large particle size in construction, applied in water conservancy projects, hydroelectric power generation, hydroelectric power stations, etc., can solve the problems of difficult decoupling and slow decoupling, and achieve the effect of saving construction period, avoiding a large number of losses, and achieving significant economic benefits.

Inactive Publication Date: 2019-12-13
POWERCHINA XIBEI ENG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide an underwater decoupling method for throwing large particle size materials in the construction of river closure, which solves the problems of slow decoupling speed and difficult decoupling in existing decoupling methods

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  • Underwater unhooking method for throwing large-grain-size material in riverway closure construction
  • Underwater unhooking method for throwing large-grain-size material in riverway closure construction
  • Underwater unhooking method for throwing large-grain-size material in riverway closure construction

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The present invention is an underwater decoupling method for throwing materials with large particle diameters during river closure construction, comprising the following steps:

[0028] Step 1, Pretreatment of Concrete Tetrahedron 1

[0029] A group of suspension rings 6 parallel to each other are set on the surface of the concrete tetrahedron 1 for standby; as figure 1 As shown, the cross section of the concrete tetrahedron 1 is an isosceles trapezoid, and its mass is 5-30 tons. Concrete tetrahedron 1 is used as intercepting material for the purpose of blocking dragon mouth 5 .

[0030] The horizontal distance between two suspension rings 6 is 20-30cm, and the radius of each suspension ring 6 is 20-25cm. Lifting ring 6 is in order to block cylindrical pin 2, conveniently mentions concrete tetrahedron 1.

[0031] Step 2, lifting

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Abstract

The invention discloses an underwater unhooking method for throwing a large-grain-size material in riverway closure construction. The method specifically comprises the steps that firstly, a set of parallel lifting rings is arranged on the surface of a concrete tetrahedron; secondly, a cylindrical pin is arranged in the two lifting rings in a penetrating manner, and meanwhile a rope is tied on thesurface of the cylindrical pin; thirdly, a truck crane is started, and a lifting hook of the truck crane is hooked to the portion of the cylindrical pin, located between the two lifting rings, of theconcrete tetrahedron; and fourthly, when the concrete tetrahedron is placed at the position required by a closure gap, the lifting hook is loosened, when no stress relation exists between the liftinghook and the cylindrical pin, the rope is pulled till the cylindrical pin slides out from the two lifting rings, and unhooking is completed. According to the underwater unhooking method, unhooking isachieved through the method that the lifting rings are arranged on the concrete tetrahedron and are used in cooperation with the cylindrical pin and the rope and the rope is manually pulled on a closure berm platform to achieve unhooking, the construction period can be saved, meanwhile, closure materials can be prevented from being greatly lost, and closing is achieved earlier.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction, and in particular relates to an underwater decoupling method for throwing materials with large particle diameters during river closure construction. Background technique [0002] At present, in the hydropower stations and water conservancy projects built in the high mountains and valleys of our country and on the big rivers, the river needs to be intercepted after the diversion project is completed and the diversion conditions are met during the construction period. During the closure construction, due to the high flow rate of the dragon mouth, it is necessary to throw such as steel bars. Large particle size materials such as cages and concrete tetrahedrons can be combined. [0003] The investigation on the underwater decoupling method of throwing large particle size materials in the river closure construction of my country's existing water conser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/08E02D15/00E02B9/00
CPCE02B9/00E02D15/00E02D15/08Y02E10/20
Inventor 王凤安
Owner POWERCHINA XIBEI ENG
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