Method for treating water seepage of pavement structure in plain area

Abstract

The invention relates to a method for treating water seepage of a pavement structure in a plain area. The method includes: encircling an area, needing to be drilled, through a honeycomb-structure splash-proof unit; by the aid of a pile driver, subjecting the area needing to be drilled and gravel piles to hole drilling; filling drilled holes with mixed fillings by layers, and ramming the mixed fillings in every layer: coating circumferential walls of the drilled holes with asphalt layers after the mixed fillings in bottom layers of the drilled holes are rammed, continuously filling middle layers and upper layers of the drilled holes with the mixed fillings which are rammed in sequence; removing residual materials in the drilled hole area, filling seams and sealing the drilled holes with mortar or clay; paving a slurry seal layer. The method for treating the water seepage of the pavement structure has the advantages that a splash-proof function is achieved, compressive property and non-deformability of the mixed fillings in the drilled holes are improved, and water seepage treatment effect is improved.

Description

technical field [0001] The invention belongs to the technical field of pavement construction, in particular to a method for treating water seepage of pavement structures in plain areas. Background technique [0002] Between the pavement structural layers in the plain area, water seepage is easy, and the immersion of water causes the strength of each structural layer to decrease and increases the amount of deformation; what is more serious is that the water entering the pavement structural layer penetrates into the gap between the pavement structural layers, Under the action of traffic load, high pore water pressure and high velocity water flow are formed, which scour the pavement structure, damage the subgrade, and form pavement diseases, especially in the case of bad weather, the frost heaving effect of water further aggravates the severity of pavement diseases form; [0003] The existing method of water seepage in the pavement structure is mostly closed-cell grouting, but...

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Problems solved by technology

[0003] The existing method of water seepage in the pavement structure is mostly closed-cell grouting, but after a period of use after treatment, under the repeated action of the load, the fine materials of the base layer and water are extruded from the joints in the holes together, resulting in The main reason is the damage of the joint filler and the infiltration of rainwater. The joint on the hole is the weak link of the road surface. The damage of the joint will then lead to the damage of the road surface, which seriously affects the smoothness of the road surface and driving comfort;

[0004] At the same time, most of the existing closed-cell grouting is filled with graded crushed stones. Since graded crushed stones are elastic-plastic materials with relatively large porosity, permanent deformation will inevitably occur under long-term operation under traffic load. Repairing again is a waste of time, material resources, and manpower. The gaps between the graded crushed stones will reduce the overall strength and compressive performance of the filling material. The corresponding coagulation force or cohesion force reduces its anti-deformation ability; directly sealing the hole through mortar cannot prevent rainwater from entering the hole in time and destroy the strength of the mixed filling material;

[0005] Drilling is required at the initial stage of closed-hole grouting, but the noise during drilling is too loud, which is not conducive to technical conversations during construction operations, and the occurrence of errors during drilling cannot be avoided in time. Objects in other formations are splashed randomly, causing the working environment to be dirty and messy, and the management of the working environment is not up to standard

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