Multi-layered structure and construction method of high embankment near mountains

Abstract

The invention relates to a multi-layered structure of a high fill roadbed alongside a mountain, comprising a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a mountain platform, a platform and a cross slope, wherein the multi-layered structure comprises a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a platform and a cross slope. The hill is excavated into a stepped structure, and the hill is provided with a hill platform; The subgrade of Shanao road section in the lower part of the stepped mountain body is filled with a rock-filled embankment, the thickness of the pavement layer of the rock-filled embankment is not more than 60cm, and the filling stones are blocks of different sizes of 20-30cm, andcrevices are left between the blocks; and the rock-filled embankment is filled with the rock-filled embankment. Non-woven geotextiles are laid on the top surface of the rockfill embankment; The rockfill embankment consists of graded slopes with platforms between each grade, and the slope ratio is consistent. An inverted trapezoidal drainage channel is arranged at the bottom of the slope of the rockfill embankment; Earth-rock mixture fills from the top surface of the rockfill embankment to the bottom of the roadbed in stages. The invention has the beneficial effects that the subgrade stratum is filled with a block stone, and can be used as a surface drainage water permeable layer, thus ensuring the smooth drainage of the subgrade after the subgrade is filled, and reducing the influence ofsurface water on the stability of the subgrade during the operation period.

Description

technical field [0001] The invention relates to a multi-level structure and a construction method of a high fill embankment near a mountain, belonging to the field of embankment construction. Background technique [0002] The subgrade with a filling height greater than 18m (soil) or 20m (stone) is a high-fill subgrade. [0003] High-fill subgrades are widely distributed in mountainous areas of our country and have the following basic characteristics: [0004] 1. The filling height of the high-fill subgrade is high, and the subgrade must have: sufficient overall stability, sufficient strength and stiffness, and sufficient hydrothermal stability; [0005] 2. The amount of subgrade filling works is large and the construction period is long, resulting in many filling problems and difficult construction control; [0006] 3. The cumulative settlement of the embankment itself is large, and the post-construction settlement requirements for controlling the filling height of embankm...

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Problems solved by technology

[0005] 2. The amount of subgrade filling works is large and the construction period is long, resulting in many filling problems and difficult construction control;

[0006] 3. The cumulative settlement of the embankment itself is large, and the post-construction settlement requirements for controlling the filling height of embankment units are more stringent;

[0007] Based on the above characteristics, after the subgrade is filled, it will take a long time to stabilize. This is because after the subgrade is filled, although the earth pressure on the foundation tends to be stable, in addition to the earth pressure during use , it will also be affected by many factors such as driving and environment

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