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Combined type widening transformation base layer based on old road pavement and construction method

A road pavement and combined technology, which is applied to roads, roads, on-site coagulation pavements, etc., can solve problems such as uneven stress on the road surface, reducing the connection between the widened base and the old road, and uneven settlement of the road surface , to achieve the effect of improving connectivity, reducing uneven settlement, and ensuring overall stress

Inactive Publication Date: 2021-08-17
湖南隆吉工程建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that there are the following defects: the traditional way of excavating steps to realize the connection between the old and new roads will reduce the connection between the flat-width base and the old road, resulting in uneven stress on the road surface after reconstruction and expansion, and road surface The case of uneven settlement

Method used

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  • Combined type widening transformation base layer based on old road pavement and construction method
  • Combined type widening transformation base layer based on old road pavement and construction method
  • Combined type widening transformation base layer based on old road pavement and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to figure 1 , based on the combined widening reconstruction of the old road pavement, the base includes the old road 1 and the new road. A foundation pit is set up beside the old road 1, and the foundation pit is set vertically. The on-site construction personnel use an excavator to realize the digging. The foundation pit is longitudinally located below the pavement structure layer of the old road 1 and extends laterally below the pavement structure layer of the old road 1 .

[0039] The bottom of the foundation pit is poured with a concrete corbel 2, and the concrete corbel 2 fills the bottom space of the foundation pit. Concrete corbel 2 is laid with self-adhesive glass fiber grid 3, which can be directly laid on cement concrete without steel nails for anchoring. It solves the problem of traditional anchoring glass fiber It is difficult to control the anchoring quality of the grid during the laying process.

[0040] The new road includes a widened base 4, whic...

Embodiment 2

[0044] refer to figure 2 The difference between embodiment 2 and embodiment 1 is that the structure of the planting bar 7 is different. In embodiment 2, each planting bar 7 is welded with a reinforcing hook 71 at one end close to the widening base 4, and the welding node is in the pouring of the widening base Before 4, the reinforcing hooks 71 are bent vertically downwards. The setting of the reinforcing hook 71 can increase the contact surface between the widening base 4 and the planting bar 7, so that the stabilizing effect of the planting bar 7 on the widening base 4 is more sufficient.

[0045] The connection between the reinforcing hook 71 and the planting bar 7 is set as a curved arc 72 . The joint provided by the curved arc 72 can weaken the edges and corners between the reinforcing hook 71 and the planting bar 7, so that the widened base layer 4 and the reinforcing hook 71 can be more fully contacted and the existence of gaps can be reduced.

[0046] Based on the ab...

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Abstract

The invention relates to an old road pavement-based combined type widening transformation base layer and a construction method, and relates to the technical field of pavement transformation. The combined type widening transformation base layer comprises an old road and a new road, the old road and the new road are jointly paved with an asphalt surface layer, the new road comprises a widening base layer flush with the old road pavement, a concrete sleeper beam is poured below the widening base layer and extends to the position below the old road pavement structure layer, and embedded steel bars are arranged on the longitudinal side edges of the old road and transversely extend into the widening base layer. The method has the effects that: the connectivity of the widened base layer and the old road is improved, the overall stress of the reconstructed and expanded road surface is ensured, and differential settlement of the road surface is reduced.

Description

technical field [0001] The present application relates to the technical field of pavement reconstruction, in particular to a base and construction method based on old road pavement combined widening reconstruction. Background technique [0002] With the increasing economic development and traffic volume, many highways in our country need to be widened. Road widening can make it easier for people to travel and reduce traffic pressure, but the existing road widening construction technology often uses excavation steps to connect the old and new roads. [0003] Related technologies can refer to the Chinese invention patent application publication number CN105019326A, which discloses a roadbed structure for road widening, including new road layer, filling material layer, gravel cushion, concrete retaining wall, original roadbed edge Slope, the original subgrade slope is trimmed into a stepped shape, and the concrete retaining wall is set on the last nth step of the stepped subgr...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04E01C7/18
CPCE01C3/00E01C3/04E01C7/18E01C7/185
Inventor 周磊文宏谋阳俊
Owner 湖南隆吉工程建设有限公司
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