A lateral pile-sheet structure suitable for rock steep slope embankment

Abstract

The invention discloses a lateral pile-plank structure suitable for a rocky abrupt-slope embankment. According to the lateral pile-plank structure, reliable retaining is provided for an abrupt-slope road in a mountain area, the transverse stiffness coordination of the road bed is effectively controlled, non-uniform settlement is avoided, the operation comfortableness of an expressway or high-speed railway is improved and safety accidents are avoided. The lateral pile-plank structure comprises cantilever piles (3), reinforced concrete slabs (2) and fills, wherein the cantilever piles (3) are arranged on the lower side of the abrupt-slope embankment, in the extending direction of the embankment, at intervals; the lower parts of the cantilever piles (3) are anchored in a rock body; the reinforced concrete slabs (2) are laid below a pavement structural layer (1); the outer ends of the reinforced concrete slabs (2) are fixedly connected with the tops of the cantilever piles (3); the fills are placed at the rear parts of the cantilever piles (3); geogrids (4) are vertically laid in the fills in a layering manner.

Description

technical field [0001] The invention relates to a reinforcement structure for railway and highway subgrades, in particular to a lateral pile-slab structure suitable for embankments with steep rock slopes. Background technique [0002] In recent years, the design speed of railways and highways has been greatly improved, and high-speed railways and expressways have been built on a large scale in mountainous areas. Due to the steep valleys and complex topography and geology in mountainous areas, it is inevitable to build roadbeds on steep slopes, and the higher design speed also puts forward higher requirements for the overall stiffness of the roadbed. For embankments with steep slopes in mountainous areas, pile-slab walls are currently used for reinforcement. When the natural transverse slope is steep, the cantilever length of the pile-slab wall is large, the structural deformation and stability are difficult to control, and the overall lateral stiffness of the subgrade is un...

AI Technical Summary

Problems solved by technology

When the natural transverse slope is steep, the cantilever length of the pile-slab wall is large, the structural deformation and stability are difficult to control, and the overall lateral stiffness of the subgrade is uneven, causing uneven settlement and cracking of the pavement structure, resulting in investment and safety risks that are difficult to control

For steep rock embankments, especially half-filled and half-dug roadbeds, the stiffness of the rock base on the excavation side is inconsistent with that of the fill side, and there is a big difference. For expressways or high-speed railways, the difference in stiffness will cause different Uniform settlement will affect the running comfort, and excessive uneven settlement will also cause safety accidents

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