A way to strengthen cones bridges and/or overpasses

 

(57) Abstract:

The invention relates to the field of construction and can be used to strengthen cones bridges, overpasses, slopes of roads, coastlines, river-beds of water bodies, etc., the Method includes compacting the embankment, forming a cone, laying geotextile installation of the geogrid, the filling of the cells of the geogrid mineral material and consolidation of the concrete of the upper and lower parts of the geogrid, the formation of concrete stops. What's new is that the sheets of geotextile material is laid down over the surface of the mound cone overlap and binding, the geogrid establish separate sections 5.25-7,0 1.0-2.5 m in the stretched condition, the filling of the cells of the geogrid mineral material is produced on the entire thickness of the geogrid layers of mineral material, and then plant soil, after which produce secure the geogrid concrete in the lower part on the bottom of the cone with the formation of concrete stops. The technical result achieved by the invention consists in improving the strength of the fixed surfaces, to increase the load bearing capacity, resistance to wind and water erosion, and increase the can be used to strengthen cones bridges, overpasses, slopes of roads, coastlines, river-beds of water bodies, etc.

There is a method of strengthening slopes of roads, including alignment and planning of surface slope, laying down and forward on the front of the geogrid, pre-stretched position. The fixing of the geogrid on the bottom layer of the slope between the sections produced by the contour of the anchors. Cell geocells filled with vegetable soil or stone materials. When using stone material to fill the geogrid at the bottom layer of the stack slope of geotextile fabric with an overlap of 10-15 cm (see EN 2090702 C1 IPC6E 02 D 17/20, publ. 20.09.1997).

The closest analogue to the proposed invention is a method of strengthening cones bridges and/or overpasses, including profiling and compacting the top layer of the mound, forming a cone, install a layer of non-woven geotextile material, stretching on the cone of the geogrid, which secure the anchors to the soil surface. Cell geocells filled granite with frost M-200. Cells of the geogrid at the top of the cone width of 1 m manalicious concrete, and on the bottom of the cone utonom construction. OI "the road", Informator, M., 1998, vol. 5, S. 10, 62).

The objective of the invention is to increase the strength of fixed surfaces, increase the bearing capacity, resistance to wind and water erosion, and increases the service life of buildings erected.

The problem is solved in that way strengthening cones bridges and/or overpasses, including compaction of the embankment, forming a cone, laying geotextile installation of the geogrid, the fixing anchors on the surface of the cone, fill the cells of the geogrid mineral material and consolidation of the concrete top of the geogrid and the lower part of the geogrid at the bottom of the cone with the formation of a concrete fence panels of geotextile material is laid down over the surface of the mound cone overlap in the transverse direction on 40-50 cm, and fix, the geogrid set of individual sections of the size of a 5.25-7,0 1.0-2.5 m in the stretched condition, when the slope of the cone 60ouse a geogrid with a vertical seam, and when the slope is greater than 60ouse the geogrid with angled seam. Fixing anchors produced in the upper part of the embankment of the cone and in the direction from top to down under the enclosure ' s bridge wall and/or overpass, fill the cells of the geogrid mineral material is produced on the entire thickness of the geogrid layers faction 3-10 mm, and then the fraction of 10-20 mm with a ratio of fractions of 1:10 to 10:1 or first mineral material fraction to 3 mm, and then the fraction of 3-10 mm and a fraction of 10-20 mm in the ratio 2:1:10 to 4:2:4 respectively, or mineral material fraction 3-20 mm, and then plant soil, then produce secure the geogrid concrete in the lower part on the bottom of the cone with the formation of concrete stops size for 45-60 45-60 cm and the adjacent sections of the geogrid strip with a width of 0.8-1.2 m, and adjacent to an inner wall sections of the geogrid strip with a width of 0.8-1.2 m, the thickness of the concrete layer in both cases is 13-20 see

The invention is carried out as follows. The cone surface of the overpass, inclined 45oto be strengthening, carefully planned and compacted. Seal the surface of the produce with the help of vibratory plates with an area of 1 m2that move by electric windlass or manually up and down the generatrix of the cone and along the front with overlapping footprint by approximately 20%. The soil is compacted to achieve a coefficient potenciado carry down on the cone surface with overlap in the transverse direction 45 see

The frequency of installation of anchors depends on the terrain and topography. Thus, when the slope of the cone 1:1.25 anchors set in increments. Panels of geotextile in the upper part secured to prevent shifting of paintings wooden pegs or metal anchors, which are subsequently removed. The step between the pegs is not regulated. The lower part of the paintings is slid into the trench at the bottom of the cone for the formation of concrete stops.

After that, proceed to the installation of the geogrid. They are established by separate sections in the extended status size, for example, 6.1 x 2,43 m Section stretches to the desired position and temporarily fix the corners and edges. The fastening is performed by the anchors of the G-shaped. The anchors are made of rebar And-1 with a diameter of 12, the length of 80-90 see In the upper part of the slopes of the geogrid start at 25 cm below the enclosure ' s wall of the overpass and fix anchors in each cell.

Between geogrid secure from top to bottom in each cell, and in the transverse direction through the cell.

Use, for example, the geogrid "prudon-494" polyethylene strips of height 10 cm, interconnected linear vertical or inclined joints located in tx2">

The lower part of the geogrid is slid in a trench on the bottom of the cone for the formation of concrete stops.

In case of strengthening of the cone of the overpass, with a slope of more than 60ouse the geogrid with angled seam. This provides increased bearing capacity strengthening cone and ensures high-quality filling of the geogrid mineral material.

Then make the filling of geo-mineral material. The filling is produced mechanically and manually by filling on top of the entire thickness of the geogrid and on top of bars on the 5 see as a mineral material, mainly used granite gravel. First fall asleep fine fractions 3-10 mm, and then the fractions 10-20 mm; the ratio of the fractions fall asleep rubble - 2:8. The selected ratio of the fractions used mineral material has a more dense packing of the filler, which contributes to improving the strength of the fixed surfaces and prevents them from leaching and weathering.

Further mineral material level and if necessary seal.

In conclusion produce concreting. In the lower part on the bottom of the cone fill geogrid, adjacent to the focus of a width of 1 m and a thickness of 15 cm

In the upper part of the cone near the inner wall of the geogrid concreted also stripe width of 1 m and a thickness of a layer 15 cm

For concrete use concrete hydraulic 30, 300 F, W 8.

The drawing shows the scheme of strengthening of the cone of the cross.

The invention improves the strength and frost resistance of the surface of the cones of bridges and overpasses, to reduce the cost of maintaining the structure and to increase its reliability.

A way to strengthen cones bridges and/or overpasses, including compaction of the embankment, forming a cone, laying geotextile installation of the geogrid, the fixing anchors on the surface of the cone, fill the cells of the geogrid mineral material and consolidation of the concrete top of the geogrid and the lower part of the geogrid at the bottom of the cone with the formation of concrete emphasis, characterized in that the sheets of geotextile material is laid down over the surface of the mound cone overlap in the transverse direction on 40-50 cm and fix, install geogrid sections 5.25-7,0 1.0-2.5 m in the stretched condition, when the slope of the cone acronym seam, fixing anchors produced in the upper part of the embankment of the cone and in the direction from top to bottom in each cell of the geogrid, and in the transverse direction through the cell, while the upper part of the geogrid down under the enclosure ' s bridge wall and/or overpass, filling the cells of the geogrid mineral material is produced on the entire thickness of the geogrid layers faction 3-10 mm, and then the fraction of 10-20 mm with a ratio of fractions of 1: 10 to 10: 1, or the first mineral material fraction to 3 mm, and then the fraction of 3-10 mm and a fraction of 10-20 mm in the ratio 2: 1: 10 to 4: 2: 4 respectively, or mineral material fraction 3-20 mm, and then plant soil, after which produce secure the geogrid concrete in the lower part on the bottom of the cone with the formation of concrete stops size for 45-60 45-60 cm and the adjacent sections of the geogrid strip with a width of 0.8-1.2 m, and adjacent to an inner wall sections of the geogrid strip with a width of 0.8-1.2 m, the thickness of the concrete layer in both cases is 13-20 see

 

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1 dwg

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