Construction method for soft rock roadbed in rainy and humid area

Abstract

The invention relates to a construction method for a soft rock roadbed in a rainy and humid area, construction of a roadbed working area is carried out according to the depth of the roadbed working area obtained in advance, and construction of the roadbed working area comprises the following steps that after the construction of an embankment is completed, a water-resisting layer is paved on a surface of the constructed embankment; a roadbed working area is paved on the waterproof layer, wherein at least two layers of geocells are arranged in the roadbed working area. The method is advantaged in that the overall modulus and rigidity of the roadbed can be remarkably improved, and the requirements for roadbed construction and long-term service performance are met.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a soft rock subgrade construction method in a rainy and humid area. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Soft rock refers to rocks with uniaxial compressive strength less than 5MPa, which are soft, weak, loose, loose, and low in strength. Generally, mudstone, shale, argillaceous siltstone, argillaceous limestone, schist, thousand Rock, slate, etc. Numerous research data show that soft rock is a special kind of rock and soil, which has the characteristics of easy disintegration, easy weathering, and water sensitivity. [0004] The inventor found that during the construction of the soft rock subgrade, especially due to the influence of humid and rainy areas, the water content of the soft rock filler itself is large, which is much hi...

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Problems solved by technology

[0004] The inventor found that during the construction of the soft rock subgrade, especially due to the influence of humid and rainy areas, the water content of the soft rock filler itself is large, which is far higher than the optimal moisture content required for subgrade compaction. This will inevitably increase the construction period and cost of the roadbed; at the same time, under the influence of rainwater, the moisture content of the filled roadbed will further increase during construction, resulting in a significant decrease in strength, and it is far from easy to excavate and dry the filled roadbed. far from realistic

During the operation of the soft rock subgrade, due to the nature of the soft rock itself, the subgrade will undergo large deformation and uneven deformation under its own gravity and vehicle cyclic load, which will cause cracking of the subgrade and road surface, affecting driving safety and service life; In addition, the high groundwater level in humid and rainy areas, under the action of capillary action and pumping, causes the water content inside or at the top of the subgrade work area to be too high, which further leads to the deterioration of the performance of the entire subgrade and insufficient stiffness, causing subgrade damage or other subgrade disasters.

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