Splicing method and structure for new and old roads in reconstruction and extension of pavement

Abstract

The invention relates to a splicing method and structure for new and old roads in reconstruction and extension of a pavement. The splicing parts of new and old roads and loading positions of vehicle wheels are staggerly arranged. The base layers and subbase layers of new and old roads are connected in a step manner, so a contact area of the roadbeds of the new and old roads is increased and frictional force at bonding sites is improved. Construction of pavement layers of the new and old roads is carried out in an inverse step manner, and the splicing parts of the pavement layers can be flexibly adjusted to favorable stress states through adjusting the width of step so as to be kept away from wheelmark zones. The thickness of a water-stop belt depends on the height of a longitudinal joint surface where the belt is located, so the functions of sealing and water stopping of the water-stop belt are realized. Ribbed reinforcement nets are laid at the splicing parts on the top of the subbase layers of cement stabilized macadam of the new road to improve the anti-shearing and anti-bending performance of the parts. The splicing method and structure provided by the invention can improve the splicing quality of new and old roads of a pavement reconstruction and extension project and carrying capacity and endurance of an integral pavement project; and the method and structure are simple, practicable, fast in construction speed, labor-saving, time-saving and good in construction quality and allows the pavement to have good anti-shearing and anti-bending performance.

Description

technical field [0001] The invention belongs to a splicing method and structure of new and old roads in the reconstruction and expansion of road surface construction. Background technique [0002] At present, with the development of the economy and the increasing number of vehicles, there are more and more projects for reconstruction and expansion of the original narrow and old roads. However, the problem of splicing new and old roads in the reconstruction and expansion of road construction has not been well solved so far. There are poor water tightness at the splicing parts of new and old roads, inconvenient construction, time-consuming and laborious, poor compactness, and shear and bending resistance. Poor and other problems are mainly manifested in the longitudinal cracking of the splicing parts between the old and new roads, causing rainwater to infiltrate. This will lead to uneven settlement of the pavement after splicing, water damage, cracking, side slipping of the r...

AI Technical Summary

Problems solved by technology

However, the problem of splicing new and old roads in the reconstruction and expansion of road construction has not been well solved so far. There are poor water tightness at the splicing parts of new and old roads, inconvenient construction, time-consuming and laborious, poor compactness, and shear and bending resistance. Poor and other problems, mainly manifested in the longitudinal cracking of the splicing parts between the old and new roads, causing rainwater to infiltrate

This will lead to uneven settlement of the spliced ​​road surface, water damage, cracking, roadbed sideslip and other diseases, seriously affecting the overall project quality of the road reconstruction and expansion

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