Construction method of flow channel gradient section of tubular unit in hydropower station
A construction method and a tubular technology, which is applied in the construction field of the tail water gradient section of the tubular unit of the hydropower station, can solve the problems of many curved surfaces and different cross-sections, etc., and achieve the effects of light weight, convenient material selection, and easy handling.
Active Publication Date: 2017-08-08
SINOHYDRO ENG BUREAU 15
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Problems solved by technology
Different sections and many curved surfaces bring great challenges to the installation of formwork during construction
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Embodiment Construction
[0057] Such as Figure 1 to Figure 6 A construction method for the tail water transition section of the flow path of the tubular unit of the hydropower station shown includes the following steps:
[0058] Step 1. Prefabrication of the tapered gradient formwork: Firstly, a plurality of arc formworks 1 are fixed on the corresponding arc steel trusses 2 to form a tapered panel support body, and then the tapered panel support bodies are arranged at intervals in sequence On the steel frame 4, the lengths of the plurality of tapered panel supports gradually increase along the extension direction of the steel frame 4, and finally the tapered panels 3 are fixed on the plurality of arc-shaped templates 1, thereby completing the tapered gradient Prefabrication of templates (eg figure 2 and image 3 shown); in this embodiment, the number of the tapered gradient templates is two.
[0059] Step 2. Binding of steel bars in the transition section below the center line 17 of the runner; ...
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The invention discloses a method for constructing transition sections of a through-flow unit channel of a hydropower station. The method includes the following steps that conical transition formworks are prefabricated; transition section steel ribs below the center line of the channel are bound; the conical transition formworks below the center line of the channel are installed; plane side forms are installed; a first full space support is erected; a concrete pouring side form below the center line of the channel is arranged; an end socket formwork below the center line of the channel is installed; the channel tail water transition section below the center line of the channel is poured; the first full space support is detached; the lower left transition formwork and the lower right transition formwork are demolded; a second full space support is erected; the conical transition formwork above the center line of the channel is installed; a plane top form is installed; transition section steel ribs above the center line of the channel are bound; a concrete pouring side form above the center line of the channel is installed; an end socket formwork above the center line of the channel is installed; the channel tail water transition section above the center line of the channel is poured; the first full space support, the second full space support and all the formworks are detached. By means of the method, the problems that manufacturing cost is high and transportation is difficult during tail water section prefabrication can be avoided.
Description
technical field [0001] The invention belongs to the technical field of flow channel construction of a tubular unit of a hydropower station, and in particular relates to a construction method for a tail water gradient section of a flow channel of a tubular unit of a hydropower station. Background technique [0002] The tailwater gradient diffusion section of the flow channel of the tubular unit of the hydropower station, for example, the tailwater gradual diffusion section of the Juting Hydropower Station in Ningqiang County, Shaanxi Province, not only gradually expands in width along the direction of water flow, but also gradually increases in height, and its shape changes from round to round. The shape gradually becomes square. Different sections and many curved surfaces brought great challenges to the installation of formwork during construction. How to design a fast and effective formwork construction method for pouring the gradual change section of the flow channel of t...
Claims
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IPC IPC(8): E02B9/02
CPCE02B9/02Y02E10/20
Inventor 郭少博陈卫岗成斌张小民郑文颖杨西团张新利
Owner SINOHYDRO ENG BUREAU 15