Low embankment structure in phreatic high slity soil region and construction method thereof

Abstract

The invention discloses a low embankment structure in a phreatic high slity soil region and a construction method thereof. The low embankment sequentially consists of a substrate turning and digging treatment layer, an impermeable liner layer, a road bed and a pavement structural layer from bottom to top, wherein the impermeable liner layer has the thickness of 30-40cm, is gravel and grit or treated soil doped with 4-5 percent of cement or lime and is higher than the natural earth surface; the road bed and the pavement structural layer are made of conventional materials; two grooves are respectively arranged at two sides of a median strip; the depth of the each groove is greater than the thickness of the pavement structural layer; the width of the groove is 0.3-0.45m; the bottom of the groove is directly communicated with the road bed layer; gravel or girt is filled in the grooves to form a drainage wall with a backfilter draining function; and a horizontal drainage pipe is arranged at the bottom of the drainage wall and communicated to the outer side of the roadbed. The invention can effectively prevent capillary water from rising and accelerate the roadbed to drain during the construction of the low embankment.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a capillary water treatment and construction method for low embankments in silty soil areas with high groundwater levels. Background technique [0002] As the supporting structure of the road surface, the roadbed bears the load transmitted from the road surface, and its strength, stability and durability directly affect the usability of the road surface. Low embankment refers to the embankment whose height is less than the depth of the subgrade work area under the load of heavy vehicles. The design concept of high-grade highway and low embankment is a brand-new design idea and method, which can effectively save non-renewable land resources, reduce the scale and difficulty of the project, reduce the number of projects and save the cost. However, in areas with high groundwater levels, especially in areas with silty soil, the rise of capillary water under low embankments...

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Problems solved by technology

[0003] In order to solve the problem that the rise of capillary water in the silty soil area with high groundwater level in the prior art affects the implementation of the low embankment, the present invention provides a low embankment structure and construction method in the silty soil area with a high groundwater level. It can effectively prevent capillary water from rising and accelerate roadbed drainage

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