Special-shaped splicing design method for new and old roads
A design method and road technology, applied in design optimization/simulation, special data processing applications, complex mathematical operations, etc., to achieve good simulation results, simplify simulation calculations, and reduce the amount of calculation
Pending Publication Date: 2021-11-12
CHINA COMM NORTH ROAD & BRIDGE +1
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Problems solved by technology
However, at present, there are few cases where the finite element method is used for auxiliary design of new and old pavement splicing
Method used
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[0035] Embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.
[0036] A design method for the splicing of new and old roads with different shapes. Irregularity means that there are differences in the structural layer modulus, stiffness, thickness and other indicators when the new and old pavement structural layers are spliced, thereby affecting the integrity and stress continuity of the old and new pavement splicing. The design method includes:
[0037] Step S1, establish a two-dimensional model of the cross-s...
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The invention discloses a special-shaped splicing design method for new and old roads. The method comprises the following steps: establishing a road splicing cross section two-dimensional model which comprises pavement layers, roadbed layers and foundation layers, arranging a geogrid at an overlapping junction of the pavement layers, simulating the roadbed layers and the pavement layers by adopting plane strain elements, simulating the geogrid by adopting bar elements, simulating the foundation layers by adopting infinite elements, and obtaining a finite element model; carrying out horizontal layered loading on the new roadbed layer and the new pavement layer to simulate horizontal layered filling in construction, and obtaining final deformation data and stress simulation data in a construction stage; loading the final deformation data and stress simulation data in the construction stage on the finite element model, and applying a vehicle load to solve and obtain deformation data and stress simulation data in an operation stage; and changing an overlapping size of the pavement layers, filling heights of the new roadbed layer and the new pavement layer and an arrangement position of the geogrid, and recalculating until the deformation data and the stress simulation data in the operation stage are lower than a deformation threshold value and a stress threshold value, so as to obtain optimal design data.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a design method for special-shaped splicing of old and new roads. Background technique [0002] In the road splicing reconstruction and widening and expansion projects, the newly filled road base and pavement layer act on both sides or one side of the old road base in the form of side loads, and the new and old road bases and pavement layers are spliced together to form a whole. Cause the interaction between the old and new road bases and pavement layers. In particular, the pavement splicing of new and old roads is an important part of construction, and the technical requirements for its construction are relatively high. Once the splicing technology of the pavement layer is unqualified, it may cause various pavement layer diseases, resulting in a greatly reduced service life and safety of the road. and lower. [0003] The structural strength of the new and old p...
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IPC IPC(8): G06F30/13G06F30/23G06F17/15G06F119/14
CPCG06F30/13G06F30/23G06F17/15G06F2119/14
Inventor 刘恩华沈涛董泽峰贺陆明
Owner CHINA COMM NORTH ROAD & BRIDGE