SU1622493A1 - Pipe under enbankment - Google Patents

Abstract

The invention relates to the construction of pipes located under bulk structures, such as dams, dumps, roads. The aim of the invention is to reduce material consumption and increase reliability. The pipe under the embankment contains a bottom plate 2 placed on the base 1, arch 3 and walls 4, the vertical planes of which have bevels 7. The pipe is provided with fencing plates 9. And the bottom plate 2 is made with through grooves 8 placed along the walls 4 to install the projections 6, which are formed on the lower parts of the walls 4. The bevels 7 are made on the inner planes of the protrusions 6. The cross section of each groove 8 is equal to the cross section of the protrusion 6 at a level above its bevel, and the fencing plates 9 are placed between the projections 6 along the curb hydrochloric wall surface of the pipe 4. 4 il.

Description

1

The invention relates to the construction of pipes located under bulk structures, for example, dams, dumps, roads.

The purpose of the invention is to reduce material consumption and increase operational reliability.

FIG. 1 shows a pipe under the embankment, a cross-section; in fig. 2 - the same, in the final stage of the structure sinking; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one.

The pipe under the embankment includes a base 1, a bottom plate 2 and walls A connected to the arches 3, connected by means of grooves 5 with projections 6, which are made in the form of two wedges 7 with working surfaces facing inwards. At the same time, the bottom plates 2 have through grooves 8 located along the walls 4. The area and configuration of the cross section of each protrusion 6 in the extreme top section are equal to the area and configuration of each of the grooves 8 of the bottom plates 2. The fencing plates 9 entering the grooves 10 the protrusions 6, are supported by their lower face in the bottom plate 2 with the possibility of sliding on the non-external surface of the walls 4 when they fit against the plates 2. At the same time, the plates 9 prevent the soil from spilling into the pipe when the foundation is performed intermittently and with solid walls . The drawdown of the projections b can continue up to the stop of the lower edges of the walls 4 into the bottom plate 2. Next, the pipe works as a geometrically immutable (rigid) structure.

Another embodiment is possible, when the bottom plate 2 is made in the form of a solid rectangular parallelepiped, which is completely between the projections 6. In this case, the wedge is connected with the possibility of slipping along the end surfaces of the bottom plate. In this case, the arch and the walls can be displaced as far as the arch of the arch 3 into the wedge of the bottom plate 2.

The pipe works as follows

Under the action of the vertical pressure caused by the weight of the overlying embankment soil and the external load, the elements of the pipe - arch 3 and walls 4 move down, pressing the wedge 7 of the projections 6 into the base 1.

In the embankment above the pipe, an area of unfilled soil forms, i.e. vault of natural equilibrium. At the same time, the pressure on the pipe is reduced, since it will be determined by the weight of the rocks enclosed only within the limits of the natural equilibrium, and not by the weight of all the overlying layers of soil. The pipe-mound system comes to balance. In the next period of time when exposed to external disturbances

(for example, temporary loads) or a change in the physicomechanical characteristics of the surrounding array, for example, a decrease in the bearing capacity of the base soil from overwetting, wedge 7 from

the weight of overlying rocks and temporary loads move down, the load on the vaulted part of the structure decreases, and the bearing capacity of the foundation increases - the system comes to a new state

balance In this case, the oblique faces of the wedges 7 of the protrusions 6 penetrate into the ground, compact it and, as it were, soil the ground, closing in the volume of the wedges in the lower face of the bottom plates 2. Large volumes of the underlying soil are combined, and the bulging is more and more difficult. soil to the sides from under the bottom plates 2 through the foundation wedges 7. The load is transferred to the foundation and bottom plates,

it is redistributed to the underlying layers of the soil, which causes an increase in the bearing capacity of the foundation, stability and performance of the entire structure. In the process of subsidence of the walls 4 relative to the bottom plates 2, the fencing plates 9 slide along the outer surface of the walls 4. At the same time, the plates 9 prevent the spillage of soil into the pipe when the foundation is performed intermittently and with solid

by walls.

The implementation of the wedges 7 with bevels directed inward, promotes the involvement of an even greater volume of soil in the work, increasing its density in a closed cavity and increasing the bearing capacity of the foundation of the structure.

Claims (1)

Claims of Invention A pipe under the embankment containing a bottom plate placed on a base, arch and walls with skips on vertical planes, characterized in that, in order to reduce material intensity and increase reliability, it is provided with fencing plates, bottom plate made with through slots placed along the walls to install the protrusions that are formed on the lower parts of the walls, the bevels being made on the inner planes of the protrusions, the dimensions in plan each groove and protrusion at a level above its bevel are equal to each other, and the fencing plates are placed in the spaces between the protrusions along the outer surface of the pipe walls.  “-. Editor V.Danko Compiled by T. Kashlikova Tehred M.MorgentalKorrektor L.Pilipenko FIG. 2 6-6 Fy