SU1161639A1 - Lining for pressure-head water duct - Google Patents

Abstract

A WATER UNDERGROUND WATER DOOR, including a steel shell concreted in an underground mine with longitudinal corrugations and annular stiffeners attached to the outer surface of the shell with slots opposite the corrugations, is made through, in order to reduce the metal intensity of the trim, the notches in the stiffeners the ends of the adjacent stiffeners are touching each other. (L with:

Description

The invention relates to the construction of underground water supply structures, conveying water with large pressures, in particular to the lining of pressure underground water lines of hydroelectric power stations and hydroelectric station. The lining of the underground pressure conduit is well-known; it includes a steel shell with longitudinal corrugations covered with plates and anchoring elements 1J turned on, which is concreted into the underground workings. The disadvantage of this lining is that the corrugations are made of two halves, which are welded to the sheath at the edges of the corrugations with one edge, and touch each other with the other free edges. Welding the two halves of the plates to a thin corrugated shell can lead to burning out of the last exit and out of it. Also known is the lining of a pressured underground water conduit, which includes a steel sheath in the underground mining with a corrugated corrugation and attached to the outer surface of the shell with annular stiffeners with slotted Tofrov C2 J. The disadvantage of this lining. is that the stiffeners, which have notches above the corrugations, do not participate in the longitudinal direction when the external pressure of the groundwater is perceived by the shell when the drainage device is in the emptied state. This circumstance leads to the waste of steel to make stiffeners higher, sufficient to anchor them into concrete lining. The purpose of the invention is to reduce the lining intensity of the lining. This goal is achieved by the fact that in the lining of pressurized underground water, which includes a steel casing encased in underground workings with longitudinal corrugations and ring-mounted stiffeners attached to the outer surface of the shell with slots opposite the corrugations, the cuttings in the stiffeners are filled through, and the ends adjacent links of the ribs touch each other. FIG. 1 shows a fragment of the lining, a cross section; FIG. 2 is a section A-A in FIG. 1; Fig, 3 - section BB on phage; 1. The lining of a pressure underground water conduit consists of a steel encased shell 1, provided with longitudinal corrugations 2, reversed. And, for example, inside the conduit. The corrugations 2 on the side of the concrete filling 3 are overlapped with plates 4 to prevent the concrete mixture from flowing into them. Ring ribs 5 of rectangular section 5 are attached to the outer surface of the shell 1. The ribs 5 are split, the slots 6 are located opposite the corrugations 2, and the ends of the adjacent links of the stiffeners 5 touch each other. The lining is located in an array of rocks 7, Lining works as follows. Under the influence of the internal pressure of water 8, the conduit is made of steel. 1 begins to lengthen in cross section by straightening the corrugations 2, transferring the force to the concrete filling 3 of the annulus. Concrete, cracking on a separate wedge, transmits forces from the steel shell 1 to the breeding array 7. When the lining is deformed, the ends of the links of the stiffening ribs 5 in the slots 6, are not obstructed by the freedom of the deformation of the steel shell 1, and the force from the inner The water pressures in the water are completely transmitted to the host rock mass 7. Due to this, the thickness of the steel shell 1 can be taken as structurally minimal. When the conduit is emptied under the pressure of the groundwater on the steel shell, the shell begins to move inside the conduit. This movement will occur until the ends of the links of the stiffeners in the places of the slits do not close with each other. After that, the pressure of groundwater transmitted from the steel shell will be perceived by stiffening ribs, working in compression for cross-sections of the conduit. Such work of stiffeners allows em to refuse from their anchoring into the annular space concrete. Because of this, stiffeners have a lower height, which ensures a reduction in the consumption of steel for their preparation, and also makes it possible to reduce the thickness of the concrete filling, annulus space.

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Claims (1)

LINE OF A HEADER UNDERGROUND WATER WATER, including a steel shell concrete in the underground mine with longitudinal corrugations and ring stiffeners attached to the outer surface of the shell with slots opposite the corrugations, characterized in that, in order to reduce the metal consumption of the lining, the slots in the stiffeners are made through and the ends the adjacent links of the stiffeners touch each other. ί