Geogrid steep slope embankment structure with wrapped faces and construction method thereof

Abstract

The invention discloses a geogrid steep slope embankment structure with wrapped faces. A plurality of geogrid layers with the wrapped faces are arranged on the free face of a side slope in a vertically-stacked mode, thick gravel cushion adjusting layers and square grid precast blocks are sequentially laid on the outer sides of the geogrid layers with the wrapped faces, and the square grid precastblocks are filled with grait; and each geogrid layer with the wrapped face comprises a geogrid, wherein the section of each geogrid is of a trapezoidal-groove structure with one side open, and the closed end of each geogrid is located on the free face of the side slope. The tail end of the each geogrid is fixed to a roadbed, and a geotechnical cloth is laid on the inner wall of each geogrid and filled with a gravelly soil roadbed filler. The problems that in the laying process of the geogrids, soil nearby the free face is difficult to compact, and the labor and time are wasted in grid stretching are solved through a geogrid reinforcement soil structure which better facilitates the geogrids to give full play to the reinforcement property and thus improve the stability of the reinforced steep slope embankment, and a matched construction technology.

Description

technical field [0001] The invention belongs to the technical field of embankment filling, and in particular relates to a steep-slope embankment structure and a construction method of a return-wrapped geogrid whose grid can be automatically tensioned. Background technique [0002] In the process of building roads in mountainous areas, when the ground transverse slope is steep, the conventional large slope toe design cannot be adopted. Masonry structures are usually used to shrink the slope toe. Using geogrid reinforced steep slope embankments can replace the masonry structure, which is significantly Reduce the construction difficulty of the project, shorten the construction period, reduce the project cost and speed up the project progress. However, during construction at home and abroad, the construction of geogrid-reinforced steep-sloping embankments all adopts the method of stacking planting bags on the air-facing surface as temporary support. The disadvantage of this meth...

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide a back-wrapping geogrid steep slope embankment structure and construction method, which is used to solve the problem of the construction of the geogrid-gravel soil reinforced steep slope embankment. Problems in integrated construction of grid tension and tension

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