A Design Method and Structure for Prevention and Control of Subsidence and Deformation Diseases of Highway Soft Rock Subgrade

Abstract

The invention discloses a design method and a structure for preventing settlement-deformation damage of a soft-rock subgrade of a road. The design method comprises the steps of (A) testing the uniaxial saturated ultimate compressive strength; (B) judging and sorting by selecting soft rocks; (C) filling the bottom part of an embankment with a layer of sand gravels; (D) filling the subgrade part with the soft-rock fillers in a layering manner, and finally paving a layer of composite geomembrane with two fabrics and one membrane; (E) after filling the soft rocks every time, filling a layer of sand gravels; and (F) reducing the distance of sandwich fillers for the soft rocks easy to humidify and disintegrate and paving a geogrid to carry out reinforcement on embankment slopes. The structure is characterized in that the bottom part of the embankment is filled with one layer of sand gravels, one layer of composite geomembrane with the two fabrics and one membrane is paved on the sand gravel, the subgrade part is filled with the soft rocks in sequence in a layering manner, finally one layer of composite geomembrane with two fabrics and one membrane is paved, the geogrid is adopted at the embankment slopes, and qualified fillers of a roadbed are paved on the top-layer composite geomembrane with two fabrics and one membrane. The design method disclosed by the invention has the advantages that the implementation is easy, the stability is improved, the effect of preventing the settlement-deformation damage of the soft-rock subgrade of the road is obvious and the cost is low.

Description

technical field [0001] The invention relates to the technical field of subgrade filling and road disease prevention and control, and more specifically relates to a design method for preventing and controlling subsidence and deformation diseases of highway soft rock subgrades, and also relates to a structure for preventing and controlling subsidence and deformation diseases of highway soft rock subgrades. According to the subgrade engineering environment Features and engineering properties of soft rock filler. Set water-permeable materials, composite geotechnical anti-seepage materials, and fill modified soil layers at intervals to treat the soft rock embankment in the embankment structure, prevent external water from infiltrating into the embankment soil, prevent uneven settlement and deformation of the embankment, and ensure the long-term soft rock embankment structure stability. Background technique [0002] Soft rock is a natural material that is soft, easy to weather, a...

AI Technical Summary

Problems solved by technology

According to the survey, in the past, due to insufficient understanding of the engineering properties of soft rock weathering materials and technical and economic constraints, the high-grade roads built in mountainous areas across the country basically had embankment settlement problems. Soft rock fillers were used, especially those that are easy to weather and wet The embankment filled with soft rock and its weathered materials has caused serious diseases such as roadbed slush and mud, uneven subsidence, and slope collapse under repeated traffic loads and humid and hot environmental conditions for many years, resulting in deterioration of the roadbed structure and maintenance engineering. increase, resulting in restrictions on the application of such fillers in highway engineering

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