A roadbed and its construction and maintenance method for preventing the influence of expansive soil capillary water

Abstract

Disclosed is a subgrade for preventing and controlling the influence of swelling soil capillary water, and a construction and maintenance method thereof. The subgrade comprises a subgrade face layer at the topmost layer and a swelling soil subgrade cushion layer located on the lowest portion of the subgrade face layer. A water-absorbing fiber geotextile layer is arranged on the lower portion of the swelling soil subgrade cushion layer and formed by transverse composite water-absorbing resin fibers and longitudinal geotextile material fibers in a woven mode, the two ends of the composite water-absorbing resin fibers extend into resin water loss pipes on the two sides of the swelling soil subgrade cushion layer, and the resin water loss pipes are filled with high-performance composite water-absorbing resin. According to the subgrade for preventing and controlling the influence of the swelling soil capillary water, and the construction and maintenance method thereof, the resin water losspipes filled with the high-performance composite water-absorbing resin are arranged on the two sides of a road, the high-performance composite water-absorbing resin is connected with the composite water-absorbing resin fibers, the water-absorbing performance of the high-performance composite water-absorbing resin is far higner than that of the composite water-absorbing resin fibers, thus a one-waywater-absorbing channel is formed, back suction of water is prevented, the continuous water-absorbing performance of the water-absorbing fiber geotextile layer is ensured, and the backflow phenomenoncaused by other disasters is prevented.

Description

technical field [0001] The invention relates to the field of road construction and construction, in particular to a roadbed and a construction and maintenance method for preventing the influence of expansive soil capillary water. Background technique [0002] When roads are built in expansive soil areas, in order to save engineering costs and the difficulty of taking soil during roadbed construction, most engineering measures such as expansive soil backfilling, modification, and slope wrapping are used to fill the roadbed within the depth of atmospheric influence. For engineering treatment, although the roadbed is backfilled with expansive soil, after the road construction is completed, the road surface and related drainage system will protect the expansive soil roadbed, and the impact of the external atmosphere is not significant, and the expansive soil roadbed will take 1 to 3 years After periodic changes, the characteristics of expansion and deformation changing with the ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of expansion deformation and strength attenuation caused by groundwater capillary action during road construction in expansive soil areas, the present invention provides a subgrade and a construction and maintenance method for preventing and controlling the capillary water effect of expansive soil. The influence of capillary action of groundwater on the expansive soil foundation can effectively improve the engineering efficiency and eliminate the influence of expansive soil engineering process gap caused by the process gap, and through the current concept of maintenance instead of repair of highways, increase later maintenance measures to prolong the expansion The life of the waterproof system of the soil subgrade, thereby improving the capillary water protection period of expansive soil

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