SU896165A1 - Dam made of locally available materials - Google Patents

Description

(54) DAM OF LOCAL MATERIALS

one

The invention relates to hydraulic structures, namely to dams made from local materials.

The known dam is made of local materials, in which the central part is made in the form of a retaining wall - an arch, and the soil is laid only on one side of the wall 1.

The disadvantage of this dam is the narrow area of its use, since arched retaining structures require a solid low-deformable base and are economically viable in relatively narrow cross-sections.

Closest to the invention to the technical essence is a dam of local materials, including a superstructure on the ridge, the core and transition zones adjacent to the lateral surface of the edge on the side of the upstream and downstream 2.

However, this dam has several disadvantages. Under construction and operation, ground structures undergo significant deformations (sediments), often exceeding 0.01h, where h is the height of the structure. Hard arch on such a deformable base can not work. The arch support on the pillars or vault requires

2

the additional consumption of concrete, therefore saving, achievable from the use of the arch on the ridge, is reduced to nothing. In addition, at the interface between the base of the arch and the deformable base (core), as the precipitation of the core proceeds, there is inevitably a discontinuity and disclosure of the water penetrable seam, which reduces the reliability of the structure. Implementation of special measures to ensure water resistance at the border of the arch - arch

and will require additional material and labor costs. Consequently, such a dam is uneconomical and unreliable in operation.

The purpose of the invention is to increase the operational reliability of the facility.

The goal is achieved by the fact that the superstructure is made of corner elements that are movably interconnected by the ends of horizontal shelves, one of the rows of which is located on the ridge of the core, 20 and the other on the ridge of the transition zone from the downstream.

Claims (2)

In addition, the connection of the horizontal shelves can be made in the form of a flexible diaphragm installed in the grooves formed on their ends. FIG. 1 shows a dam of local materials, a cross section; in fig. 2- superstructure on the crest of the dam, cross section; in fig. 3 - connection of elements 5 .4 .... superstructure, view from above. The dam includes thrust prisms 1, central core 2, transition zones 3 from the upstream and downstream, superstructure 4 on the ridge. The superstructure 4 on the ridge is made of a team of corner elements of the retaining wall 5 with horizontal shelves 6 and connections 7. The elements of the retaining wall 5, on the lateral facets of which the shaped grooves 8,, 5 are placed with their shelves 6 to each other and mounted in two rows, with a spacing of at least 0.01 h between them, where the height of the elements is. One row of elements is placed on the ridge of the core 2, and the other on the ridge of the transition zone 3 from the downstream. The co-20 dinene 7 is made of guides of the upper 9 and of a flexible, durable, waterproof diaphragm 10 and, with their guides 8, are inserted into the shaped grooves 8 on the lateral faces of the walls 5 and the shelves 6. The superstructure is filled with granular soil 11, for example sand and gravel, sandy, etc. Dam works as follows. During the deformations (precipitations) of the core 2 and transition zones 3, the prefabricated elements of the subpress wall 5, mounted with a certain pitch between them (the pitch is chosen in accordance with the expected precipitation), have the opportunity to make independent angular and linear movements and, of course, not will experience an extra 35 effort, as is the case in the rigid arch construction. The presence between the elements of the retaining wall 5 in the shaped grooves 8 on the lateral face edges of the joint 7 from the guides 9 and the flexible, durable waterproof diaphragm 10 ensures the watertightness of the structure and the strength of this node during deformations of the core 2 and the prefabricated elements of the retaining wall 5. Filtered through leakages between the guides 9 and the surface of the shaped grooves 8 water, as well as rain absorbed into the superstructure 4 filled with granular soil 4, the rain is drained freely between the shelves 6 of the retaining wall 5 placed on the crest of the transition zone 3 from the downstream. Compared with the known structures, the proposed earth dam can be erected both in narrow - 10 and in wide 10 sections. For this, 111TL {/ ТТD / G о V7Т GTGT TFIT YJ-Tl does not require special requirements for the base and coastal slopes; they can be either rocky or folded in other soils. The technical advantage of the invention lies in expanding the field of application of the dam structure, using prefabricated elements manufactured by industrial methods in factories and easily mounted at the place of installation, facilitating the construction of the superstructure and adapting it to safe operation under conditions of core deformation and transition zones, as well as in reducing the amount of work on dumping soil into resistant prisms, reducing the cost of construction, industrializing construction, increasing labor productivity, reducing the time in the construction and improvement of the reliability of the structure. The use of the invention on earth dams with a height h of more than 5 m and in sections 4–10 meters wide allows a semi-economic effect on one object more than 1 million rubles. Claim 1. Dam of local materials, including a superstructure on the ridge, a core and transitional zones adjacent to the side surface of the core from the upper and lower pools, in order to increase its operational reliability, the superstructure is made of corner elements , movably interconnected by the ends of horizontal shelves, one of the rows of which is located on the ridge of the core, and the other on the ridge of the transition zone from the downstream. 2. The dam according to claim 1, characterized in that the connection of the horizontal shelves is made in the form of a flexible diaphragm installed in the slots formed on their ends. Sources of information taken into account during the examination 1. USSR author's certificate No. 142208, cl. E 02 B 7/06, 1961. 2. USSR author's certificate number 234235, cl. E 02 B 7/06, 1968 (prototype). -,. f .la iiii w iimiimiimm - .. 8 S FIG. 3 FIG. Z - °.