Drainage test system by low-path embankment and method thereof

Abstract

The invention discloses a drainage test system by low-path embankment and a method thereof, which belong to the technical field for testing the low-path embankment drainage effect of fine grained soils on highways. The invention has the structure that a non-watertight glass tube is connected between an organic glass model casing and the bottom of a graduated water tank. The invention adopts the principle that the water level of the water tank is used for imitating the rising and falling of the underground water level, and that waterproof and drainage facilities paved in the model grooves and embankments filled in by layer are used for imitating the working condition of water-proof and drainage materials in actual projects. The invention can intuitively obtain the change laws of the water content, pore water pressure and suction of low-path embankments before and after paving various waterproof and drainage materials, thereby testing the usage effect of various waterproof and drainage facilities. The invention also has the advantages of good approximation to actual projects, reasonable scale, imitable working condition, and the like, which ensures the design and construction of low-path embankment drainage scientifically and technically.

Description

Technical field [0001] The invention belongs to the technical field of testing the water-proof and drainage effect of fine-grained soil and low embankment of expressway, and specifically relates to a low embankment water-proof and drainage test system and a method thereof. Background technique [0002] At present, my country’s road land index is relatively high. The average filling height of highway subgrade in plain areas is 3.7m~5m. Excessive subgrade will cause an increase in the number of earth and stone, the number of bridges and culverts, drainage and protection projects, and the increase in highway land area and the scale of the project. The cost is high and it also has a negative impact on the surrounding natural environment. With the full implementation of the national highway network and rural road construction, the contradiction between environmental and resource constraints has become more prominent. Saving land is a priority issue for highway construction. The avera...

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Problems solved by technology

[0003] Although the low embankment scheme has the advantages of "saving land, reducing the scale of the project, saving engineering investment, good roadside safety, and harmony with the natural and human environment"; It will not only cause the long-term strength of subgrade soil to decay, but also the subgrade with high water content will produce large plastic deformation under the action of heavy-duty vehicle dynamic load, and aggravate the settlement deformation of soft soil foundation, resulting in premature formation of subgrade and pavement. Deformation damage

Therefore, in order to ensure that the low embankment has sufficient strength against environmental influences and vehicle loads, it is necessary to take very effective waterproof and drainage technical measures, but there is no mature design method and technical measures for low embankment drainage and drainage.

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