SU1576620A1 - Water-passing structure under embankment - Google Patents

Abstract

The invention relates to the field of road construction. The purpose of the invention is to increase the reliability of work on weak soils. The water throughput construction under embankment 1 contains a pipe 2, a low-compressible material 3, enclosed between upper and lower flexible elements 4,5, made of non-woven synthetic material. On both sides of the pipe 2, the straps 6 are installed. The vertical load from the embankment is redistributed to the supports 8, sealing the corresponding areas of the soil located between the supports 8. 1 sludge.

Description

The invention relates to road construction, in particular to the construction of culverts.

The purpose of the invention is to increase the reliability of work on soft soils.

The drawing shows a culvert, cross section.

The culvert under the embankment 1 contains a pipe 2, a low compressible material 3, enclosed between the upper and lower flexible elements 4 and 5, made of non-woven synthetic material with the formation of trapezoidal prisms located on both lines of the pipe 2.

The planes of the upper and lower flexible elements 4 and 5 intersect the longitudinal axis of the pipe 2 and form an acute angle with a horizontal plane. On both sides of the pipe 2, the upper and lower flexible elements 4 and 5 surround the ties 6, made, for example, in the form of brackets with a screw connection 7 at their ends.

The ends of the flexible elements 4 and 5 are fixed on the stops 8, made in the form of whole or lattice plates. The culvert is mounted on the basis of 9.

In the summer, the lower flexible elements 5 are affected by the weight of the pipe 2, as well as the weight of the soil of the embankment 1. This load is partially transmitted through the couplers 6 to the upper flexible elements 4, which, due to their prestressing, together with the flexible elements 5 act as a flexible thread. As a result of the redistribution of the vertical load on the upper and lower flexible elements 4 and 5, the base 9 under the pipe 2 is unloaded, simultaneously with the loading of the end sections of the embankment adjacent to the stops 8. The horizontal components of the resultant forces in the stops 8 compress the soil in the horizontal directional prisms and EZZK.

Thus, there is a redistribution of the load on the soil surrounding the pipe 2 - its unloading in the aircraft zone and compression of the soil prisms AVSD, EZHZK, which eliminates the plastic destruction of the weak base 9 under the pipe 2.

In this case, the upper and lower flexible elements 4 and 5, due to the screeds 6 and stops 8, are equally loaded.

The vertical loads acting on the circuit of the ASRD of the base 9 are absorbed due to the lateral effect on the soil tugs 8, which prevent the soil of the base 9 from protruding from under the supporting surface (ASRD).

In winter, loads from frost heaving of soils affect the upper ones; flexible elements 4, and then through the couplers 6 redistribute the load on the lower flexible elements 5, transferring forces to the stops

8.

Erect a culvert in the following order. Open the pit, giving its base 9 a given shape. On the edges of the pit, stops 8 are installed. Screeds 6 are also installed vertically on the base 9 and the lower flexible element 5, a metal mesh, strips of synthetic geotextile material, for example, mandrel, bidim, etc. are laid. The edges of the lower flexible elements 5 are fixed on the stops 8. Then, a layer of low-compressible material 3 is laid on the lower flexible element 5 to a height of 20-40 cm, sealing layer by layer. A second layer of lower flexible material 5 is laid on the sprinkled layer of low compressible material 3, strengthening its ends on the stops 8 and passing through the ties 6. Next, a layer of low compressible material 3 is laid again. After laying the last lower flexible element 5 and a layer of low compressible material 3, the sections are mounted culvert pipe 2. After this, the soil is poured to the base for the first layer of the upper flexible element 4. The material of low compressibility 3 is filled and compacted. Then lay the layer of the upper flexible element 4 and fix it on the * stops 8. After laying and fixing the last layer of the upper flexible element 4, fill and compact the soil around the stops 8 and tension the upper and lower flexible elements 4 and 5.

Then make filling embankment 1 to the design level.

Claims (1)

Claim Culvert under the embankment, containing laid on the base, consisting of a low-compressible material, a pipe, located on the stops comprehensive from it, covering the pipe and flexible elements connected to the stops, characterized in that, in order to increase the reliability of work on weak soils, it is equipped with flexible elements and tie-rods located on both sides of the pipe, the stops are made in the form of installed vertical plates, while the flexible elements in cross-section are oriented in the vertical plane of the fan shaped symmetrically relative to the horizontal plane of symmetry of the pipe.