Permanent pavement design method
It is a design method and permanent technology, which can be applied to cohesive pavement, roads, roads and other directions paved on site. It can solve the problem of not being able to truly reflect road traffic and environmental conditions, not being able to reflect the nature of vehicle dynamic load, not being able to reflect the state of mechanical response, etc. problems, to achieve the effect of eliminating traffic pressure, saving resources and ensuring reliability
Active Publication Date: 2010-08-04
SHANDONG TRANSPORTATION INST
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Problems solved by technology
The equivalent method cannot truly reflect the actual traffic and environmental conditions on the road surface, which will affect the reliability of the road surface design
In terms of material parameters, traditional design methods
Method used
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[0044] The permanent pavement design process is attached figure 1 Shown:
[0045] a) Determine the ultimate strain standard at the bottom of the asphalt layer
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The invention discloses a permanent pavement design method which belongs to the field of road engineering. The method comprises the following steps: using asphalt mixture ultimate tensile strain as a design index, using a vehicle axle load spectrum, a pavement temperature field and a pavement material dynamic modulus as design parameters, and combining a computer simulation technology and an elastic laminar mechanics theory to obtain pavement structural strain distribution approaching to a true state so as to accurately predict the pavement life and design a pavement structure with long life. Compared with a traditional design method, the invention solves the important technical difficult problem that the pavement structure designed by the traditional design method needs periodic reconstruction, realizes the goals of durability, economy and environmental protection of the pavement structure and has good popularization and application value.
Description
technical field [0001] The invention relates to the field of road engineering, and specifically provides a permanent road surface design method. Background technique [0002] my country's current highway pavement structure is dominated by semi-rigid base asphalt pavement, with a design life of 15 years. The overall stiffness (bearing capacity) of the pavement structure under the design traffic load (equivalent axle load) and the fatigue cracking damage of the asphalt layer and semi-rigid layer are taken as design indicators. Based on the current design concept, the end-of-use pavement needs to be rebuilt due to structural fatigue damage. Due to the continuous increase in traffic volume and serious overloading and overloading, the active road surface often suffers early damage before reaching the design life, and the pollution and traffic congestion caused by expressway maintenance are also becoming more and more prominent. Accurately designing and predicting pavement servi...
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Inventor 韦金城杨永顺王林高雪池马士杰王晓燕
Owner SHANDONG TRANSPORTATION INST
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