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Roadbed splicing broadening structure and construction method

A technology of roadbed and pavement, applied in infrastructure engineering, roads, roads, etc., can solve problems such as aggravating disease, unsatisfactory effect, damage to old roadbed, etc., to achieve stable structure, improve bearing capacity and stability of roadbed, and prevent settlement. The effect of displacement

Active Publication Date: 2021-04-20
湖北省路桥集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can reduce uneven settlement and deformation to a certain extent, the effect is not ideal, and once it rains, the rain will soak into the roadbed and damage the old roadbed, and in severe cases, it will aggravate the disease

Method used

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  • Roadbed splicing broadening structure and construction method
  • Roadbed splicing broadening structure and construction method
  • Roadbed splicing broadening structure and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The subgrade splicing widening structure includes a transitional section 9 of the old and new subgrades arranged at the splicing place of the subgrade, and anchor bars 8 are fixedly connected to the original subgrade 1 through the guide holes 7. The transition section 9 of the old and new subgrades is provided with The vertical water passage 4 is provided with inner piles 11 and outer piles 12 at intervals below; the permeable gradation layer 10 is arranged below the vertical water passage 4 and between the inner and outer piles along the longitudinal length of the subgrade, and the water-permeable gradation layer 10 on the side of the outer pile 12 The bottom is connected to the horizontal drainage blind ditch 14 arranged at intervals, and the other end of the horizontal drainage blind ditch 14 is connected to the external drainage system, and the bottom of the permeable gradation layer 10 and the horizontal drainage blind ditch 14 is provided with a bottom waterproof la...

Embodiment 2

[0034] The construction method of the roadbed splicing widening structure comprises the following steps:

[0035] 1) if figure 2 , image 3 As shown, before construction, the floating soil, vegetation, tree roots and other construction waste on the surface of the original roadbed 1 slope should be cleaned up, and the floating soil along the original slope should be cleaned thoroughly. Use an excavator to trim the slope of the original old road soil shoulder at the joint site, cut it vertically to the design elevation of the foundation, and then drive the inner piles 11 and outer piles 12 parallel to each other at intervals along the original roadbed 1 section.

[0036] 2) if Figure 4 As shown, at the same time, a reverse soil step is built on the section of the original subgrade 1, and a drilling rig is used to open a pilot hole 7 on the step to install the anchor bar 8, and then bind the steel bars of the transitional section 9 of the old and new subgrade, and tie the anc...

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Abstract

A related roadbed splicing broadening structure comprises a permeable pavement layer, a new and old roadbed transition section, a permeable grading layer and a permeable pavement layer, wherein the new and old roadbed transition section is arranged at a roadbed splicing position in a full-length mode, the new and old roadbed transition section is fixedly connected with an original roadbed through anchor bars arranged in guide holes, vertical water pipes are arranged in the new and old roadbed transition section at intervals, and inner side piles and outer side piles are arranged below the new and old roadbed transition section at intervals; the permeable grading layer is arranged below the vertical water pipe and between the inner side piles and the outer side piles in the longitudinal direction of the roadbed in a full-length mode, and the bottom of the side, close to the outer piles, of the permeable grading layer is connected with one end of transverse drainage blind ditches arranged at intervals. The invention has the advantages that the irregular new and old roadbed transition section is adopted, the dead weight and cost are effectively reduced, the anchor bars are tightly connected with the original roadbed, the pile foundations are arranged at the bottom, the structure is stable, sedimentation displacement is effectively prevented, the integrity is high, and economic and technical benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to a roadbed splicing widening structure and a construction method. Background technique [0002] In recent years, with the rapid development of my country's economy, both urban construction and rural construction have achieved unprecedented development, and the supporting transportation network has also become increasingly developed. In order to cope with the increasing traffic volume, the previously built roads need to be reconstructed or upgraded. In order to save costs, the design and implementation plan of widening and rebuilding the old road is adopted for the reconstruction of relatively intact sections of the original road. [0003] Highway engineering is divided into two important components, the subgrade and the pavement. The subgrade is the main load-bearing structure. The driving load and lane load of the road surface are transmitted to the subgrade on the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E01C11/22E01F5/00E02D5/22
CPCY02A30/60
Inventor 杨仁平熊捷程阳张亮程双喜
Owner 湖北省路桥集团有限公司
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