Pavement structure with comprehensive waterproof reinforced roadbed as well as construction method of pavement structure

Abstract

The invention provides a pavement structure with a comprehensive waterproof reinforced roadbed as well as a construction method of the pavement structure. The pavement structure comprises a roadbed, wherein the roadbed is fully covered with a roadbed waterproof reinforced layer in a sealing manner. The pavement structure disclosed by the invention blocks water exchange between a roadbed force-bearing layer and the outside while improving bearing force and stability of the roadbed, and not only can prevent bearing force and stability from being influenced by surface water, roadbed side-slope seeped water and underground water which enter the roadbed force-bearing layer and the inside of the pavement structure so as to effectively solve water damages, but also can ensure moisture content control of a roadbed material, so that the roadbed can normally work under optimal moisture content in construction control for long time, thereby avoiding bearing force and stability deterioration as well as severe differential settlement caused by moisture content evaporation loss and non-homogeneous migration of the roadbed; the roadbed moisture content is stably controlled, and roadbed buildings in areas with swelling soil having strong water sensibility, collapsible soil and the like can use local materials sufficiently, so that excavation spoil, filling and borrowing materials and transfer are avoided, thereby not only reducing project cost, but also saving energy and protecting environment.

Description

technical field [0001] The invention relates to a pavement structure and a construction method thereof, in particular to a pavement structure and a construction method of a comprehensive waterproof reinforced roadbed. Background technique [0002] In the fields of various roads, airport runways, and municipal facilities, the service life of the road surface is a key factor affecting its use cost, and the maintenance of the damaged road will also affect the normal operation of the entire municipal and economy. Therefore, how to improve the road The service life of the construction has long been an urgent problem to be solved in construction. There are many reasons for the early damage and shortened life of the pavement; among them, the coordinated stress, anti-vibration and water accumulation between the pavement and various functional layers are the main reasons for the shortened life of the pavement; and the damage of water to the road has Pavement water damage can be divi...

AI Technical Summary

Problems solved by technology

This measure can greatly reduce the degree of frost heave of the subgrade, but the problem is that due to the rise of capillary water, groundwater will still cause frost heave damage inside the pavement structure

[0008] Although the above structure can solve the aforementioned technical problems to a certain extent (mainly solving the problem that surface water enters the base course and subgrade from top to bottom from the top of the surface layer, and groundwater enters the base course and surface course from bottom to top from the top of the subgrade), however, the filling Atmospheric precipitation on the roadbed, water seepage embankment and other water sources beside the roadbed can still seep into the interior of the roadbed through the side slope of the roadbed or the side of the base. Entering the subgrade roadbed through the sides of the road and the bottom of the foundation, and so on, water entering the subgrade from various channels or ways to make the water content exceed the optimal water content of the subgrade design will lead to a decline in its strength and stability. damage to the pavement structure

Especially for expansive soil, tuff and other soil or rocky subgrade materials that are sensitive to water expansion, disintegration, and dehydration shrinkage, the effect of wet expansion and shrinkage is obvious, and slight changes in water content will cause significant road surface damage. Therefore, ensure that the subgrade The stability of the material at the optimal water content is very important. Therefore, in addition to preventing external water from entering the roadbed from all directions to increase the water content, it is also necessary to prevent the water evaporation and migration of the roadbed caused by climate and environmental changes. The water content is reduced, which is also the main problem that the pavement structure formed by this type of roadbed material has long-term damage such as cracking, subsidence, and collapse, and it is difficult to effectively solve it.

[0009] In addition, the above-mentioned structure does not contribute to the bearing capacity and mechanical stability of the subgrade itself. In the high-fill road section, the subgrade slope is often made into a stepped and relatively gentle slope, which occupies a large area. For road sections and some special roadbed road sections, the decline in the bearing capacity and stability of the roadbed will cause the formation of potential sliding surfaces and connect them, causing slope cracking, landslides, and subsidence damage to the pavement structure. It is said that the anti-vibration effect has been improved, but due to the adhesion on both sides of the subgrade, when uneven settlement and anti-vibration vibration occur in the subgrade, the independence, integrity and stability of the subgrade are insufficient, and the ability to adapt to deformation and coordination is not strong. Local diseases appear, and local diseases will further intensify the adverse effects of surface water and groundwater on road structures

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