SU943371A1 - Water-passage structure under an embankment - Google Patents

Description

(54) WATERPROOF STRUCTURE UNDER BOTTOM

The invention relates to the construction of culverts under the mounds of railways and highways. The culvert under the embankment is known, which contains a spillway located in the body of the embankment and fences formed by longitudinal strips located above and below the pipe 1. The disadvantage of this culvert is the possibility of significant sedimentation of the entire structure, especially Based on weak soils Longitudinal strips laid over the entire length of the pipe protect it from tensile forces and cannot reduce the draft precipitation. The purpose of the invention is to increase the stability of the culvert on the grounds of weak soils and to protect the culvert from sediment. This goal is achieved by the fact that the fence located under the pipe is made in the form of a convex upward arc, and the space between the arch and the pipe is filled with a low-compressible material. With ETO4, the arch is provided with stops for redistributing the load, made at the ends of the arch and arranged at an angle to its surface. FIG. 1 shows a cistern, a longitudinal section; in fig. 2 shows section A-A in FIG. 1. The culvert under the embankment contains a culvert 1 placed in the body of embankment 2 and enclosures 3 and 4 located above and below the pipe 1. The enclosure 3 located above the pipe is formed by longitudinal strips, and the enclosure k located under the pipe is made as a convex upward arch, which is provided with stops 5 for redistributing the load, mounted on the ends of the arch, developed in the direction of the pipe, and angled to the surface of the arch. The space between the pipe 1 and the fence k is filled with a low-compressible material 6, and the fence rests on the base 7. They perform the culvert under the embankment in the following order. They dig up a ditch, plan its base 7 on a given outline, on which they arrange an arch. It is possible to make an arch from monolithic reinforced concrete or from precast reinforced concrete elements, or from other material. Fill up the space above the arch with a slightly compressible material 6, for example crushed stone or gravel-pebble soil. After that, a culvert pipe 1 is arranged in a known manner, longitudinal strips are laid over it and the embankment 2 is erected. When performing a fence under the pipe in the form of a convex. upwards, the arches redistribute the stresses in the soil foundation from the external load - embankment weight and temporary load. The arch, including the work on the perception of the vertical force, reduces the stress in the soil foundation under the middle part of the structure below the arch. The thrust arising from this | It is transmitted through arch stops on the ground in an area where the voltages from an external load are small. It is also possible to use an arch with a tie made, for example, from steel cables. The development of stops in the direction of the normal axis of the arch allows to increase the resistance of the soil under its stops, and, therefore, prevent arch deformation, which increases its resistance to vertical force action. The development of the arch stops in the direction of the pipe is done in order to protect them from the force effect, 14 directed towards the base and resulting from possible plastic shifts of the base soil under the arch. At the same time, the arch stops developed towards the pipe create favorable conditions for the static operation of the bedding material in the area between the pipe and the arch. Placing the arch in a ground environment creates favorable conditions for the arch itself, allowing it to be protected from buckling. And this, in turn, makes it possible to make the arch flexible, little material-intensive. A bedding device made from a low-compressible material reduces the draft of the pipe and protects it from the effects of heaving forces. The technical and economic effect of the application of the present invention is in the reliable operation of the culvert on the grounds of weak soils. inventive formula -1. A culvert under the embankment containing a culvert located in the body of the embankment and fences formed by longitudinal strips located above and below the pipe, characterized in that, in order to increase its stability on the bases of weak soils and protect the culvert from sediments, the fence located under the pipe is made in the form of a convex upward arch, and the space between the arch and the pipe is filled with a low-compressible material. 2, a structure according to claim 1, characterized in that the arch is provided with stops for redistributing the load, made at the ends of the arch and angled to its surface. Sources of information taken into account in the examination 1, USSR Author's Certificate .V 250967, class, Е 01 F5 / 00, 22.03.66.

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Claims (2)

The claims "1. Culverts under embankment comprising vodopropusk30 hydrochloric pipe disposed in the body of the embankment and barriers, formed by longitudinal strips, disposed above and under the pipe, characterized in that, in order povy ₃₅ sheniya its stability on the bases of weak soils and Prevention culvert from The sediment located under the pipe fencing is made in the form of an upward convex arch 40, and the space between the arch and the pipe is filled with low compressible material. 2. The construction under item 1, characterized in that the arch is equipped with ₄₅ wife stops for redistributing the load, made at the ends of the arch and located at an angle to its surface.