SU994611A1

SU994611A1 - Underground water duct

Info

Publication number: SU994611A1
Application number: SU802910895A
Authority: SU
Inventors: Виктор Фролович Илюшин; Всеволод Маркович Насберг
Priority date: 1980-04-16
Filing date: 1980-04-16
Publication date: 1983-02-07

Description

(54) ПОДЗЕМНЫЙ ВОДОВОД(54) UNDERGROUND WATER

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Изобретение относитс к строительству напорных подземных водоводов. Преимущественно оно может быть использовано при строительстве водопровод щих сооружений ГЭС и ГАЭС.The invention relates to the construction of pressure underground water lines. Advantageously, it can be used in the construction of water-supplying structures of hydroelectric power plants and PSPs.

Известен подземный водовод, включающий обетонированные в подземной выработке гофрированные и размещенные между ними гладкостенные трубопроводы, причем их стыки образованы концами гладкостенных трубопроводов, одетыми на гофрированные трубопроводы, и оснащены кольцевыми элементами 1.A groundwater conduit is known, including corrugated and smooth-walled pipelines placed between them in an underground excavation, their joints being formed by the ends of smooth-wall pipelines wearing corrugated pipelines and equipped with ring elements 1.

Этот подземный водовод имеет следующие недостатки. Во-первых, его конструкци требует выполнени большого габарита подземной выработки на участках гладкостенного трубопровода вследствие наличи высокого ребра жесткости в месте стыка гофрированного и гладкостенного трубопроводов . Во-вторых, конструкци этого подземного водовода характеризуетс большой трудоемкостью выполнени многослойных кольцевых элементов на концах гофрированного элемента.This groundwater pipeline has the following disadvantages. Firstly, its design requires a large size of the underground workings in the smooth-wall sections of the pipeline due to the presence of a high stiffener at the junction of the corrugated and smooth-walled pipelines. Secondly, the design of this underground conduit is characterized by a large laboriousness of making multi-layer annular elements at the ends of the corrugated element.

Цель изобретени - снижение габаритов подземного водовода на участках стыков , а также уменьшение трудоемкости.The purpose of the invention is to reduce the dimensions of the underground water conduit at the joints, as well as reduce the labor intensity.

Дл достижени поставленной цели подземный водовод включает обетонированные в подземной выработке гофрированные и размещенные между ними гладкостенные трубопроводы, причем их стыки образованы концами гладкостенных трубопроводов, одетыми на гофрированные трубопроводы, и оснащены кольцевыми элементами, при этом To achieve this goal, the underground water pipeline includes corrugated concreted in the underground excavation and smooth-wall pipelines placed between them, and their joints are formed by the ends of smooth-wall pipelines wearing corrugated pipelines and are equipped with ring elements.

10 кольцевые элементы каждого стыка последовательно в один слой размещены на концевом участке-гофрированного трубопровода и, кроме того, ближайщий к гладкостенному трубопроводу кольцевой элемент имеет 15 равную ему толщину стенки и жестко соедлнен по торцам с гофрированным трубопроводом , а толщины стенок остальных кольцевых элементов последовательно уменьшаютс в направлении от сты.ка.10 annular elements of each joint are successively placed in one layer on the end section of the corrugated pipeline and, moreover, the annular element closest to the smooth-walled pipeline has 15 equal wall thickness and is rigidly connected to the ends of the corrugated pipeline, and the wall thicknesses of the remaining annular elements are successively reduced in the direction from the st.ka.

На фиг. 1 изображен подземный водовод FIG. 1 shows an underground waterway

20 на участке стыка гофрированного и гладкостенного трубопроводов, продольный разрез; на фиг. 2 - сечение А-А на фиг. 1.20 at the junction of corrugated and smooth-walled pipelines, longitudinal section; in fig. 2 is a section A-A in FIG. one.

Claims

Underground conduit includes sections of the corrugated pipeline 1 and smooth-wall pipeline 2, hermetically interconnected at the joints. The pipelines are mounted in the underground excavation 3 and omonoli.cheny in it concrete 4 with rock mass 5. Each joint is formed by the end of a smooth-wall pipeline 2, dressed on the corresponding end of the corrugated pipe I. The tightness of the seam is also provided by liners 6 and welds 7. In addition, each joint is equipped with ring elements 8, successively in a single layer, placed on the end section of the corrugated pipeline 1. The ring element 9 closest to the smooth-walled pipeline 2 is rigid Osh, and welds 10 bonded to the corrugated pipe 1 and has a thickness of the wall equal to the thickness, and the wall of a smooth-walled pipeline. The wall thicknesses of the remaining ring elements are successively reduced in the direction from the joint. The parameters of the ring elements (length, steel grade, wall thickness) are determined by calculation or on the model in each specific case, depending on the diameter of the pipeline, internal water pressure, deformative characteristics of the rock. The device works as follows. When the internal pressure of water in the pressure conduit is perceived, its corrugated pipelines made of sheet steel freely deform and transmit all the force to the surrounding rock. Smooth-walled pipelines, designed for the perception of full or partial internal pressure, are made of steel plate and therefore are slightly deformed in cross section. The presence of an annular element 9 with a wall thickness equal to the thickness of the smooth-wall pipeline and rigidly attached to the corrugated pipeline at the end section of each corrugated pipeline does not allow to transfer part of the effort from the corrugated pipeline to the smooth-walled one. The ring elements 8 with successively decreasing wall thicknesses from the joint disperse in the longitudinal direction local stresses in the corrugated pipeline. Thus, the invention allows to significantly reduce the cost of performing an underground conduit while ensuring operational reliability. Claims of the invention Underground water conduit comprising corrugated concreted in underground excavation and Smooth-walled pipelines placed between them, and their joints are formed by the ends of smooth-wall pipelines that are attached to the corrugated pipelines and are equipped with ring elements, characterized in that, in order to reduce the dimensions of the underground conduit at the joints as well as reducing labor intensity, the ring elements of each joint are successively placed in one layer on the end portion of the corrugated pipe yes, the closest to the smooth-walled pipe the annular member has a thickness equal to it and are rigidly connected at the ends with a corrugated conduit, and the remaining wall thickness of the annular elements umenschayuts successively in a direction away from the joint. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 384971, cl. E 02 B 9/06, 1971 (prototype)

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