Treatment structure at joint part of reconstruction and extension project of highway

A technology for highways and joints, applied to roads, roads, buildings, etc., to achieve the effects of eliminating uneven settlement, reducing settlement, and saving costs

Inactive Publication Date: 2013-04-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technical measures are aimed at the differential settlement of the junction of old and new roadbeds, but there are few technical measures for the differential settlement of the junction of old and new roadbeds. Finding a treatment technology for the junction of new and old roadbeds and pavements in expressway reconstruction and expansion projects can reduce the number of...

Method used

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  • Treatment structure at joint part of reconstruction and extension project of highway
  • Treatment structure at joint part of reconstruction and extension project of highway
  • Treatment structure at joint part of reconstruction and extension project of highway

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] see figure 1 , figure 2 and image 3 , the old embankment 10 and the new embankment 7 are excavated with steps 6 and the new embankment 7 splicing. When the embankment 10 is filled with clay or sub-clay, the width of the steps 6 at the splicing place is not less than 2.0m; When the subgrade filling of the embankment 10 is sandy soil, the width of the step 6 at the joint is not less than 1.5m, the inner slope of the step 6 is 2% to 4%, the height of the step 6 is not more than 1.5m, and a geogrid is laid horizontally on the step 6 The grid 5 is provided with double rows of CFG piles 8 at the junction of the old embankment 10 and the new roadbed 7. The CFG piles 8 are poured from a mixture of cement, fly ash, stones, stone chips (sand) and water. It has a certain bonding strength, double rows of longitudinal beams 9 are arranged on the double rows of CFG piles...

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Abstract

The invention discloses a treatment structure at a joint part of a reconstruction and extrusion project of a highway. A step (6) is excavated at a roadbed joint part between an old road embankment (10) and a new roadbed (7) for splicing with the new roadbed (7), a geogrid (5) is laid on the step (6), a CFG (cement fly-ash gravel) pile (8) is arranged at the roadbed joint part between the old road embankment (10) and the new roadbed (7), a longitudinal beam (9) is arranged on the CFG pile (8), and a steel wire mesh is laid on a pavement joint part between the old road embankment (10) and the new roadbed (7) of a new pavement (4). The combination of the CFG pile (8) and the longitudinal beam (9) can improve the bearing force at the joint part between the new and the old roadbeds and reduce sedimentation; and the combination of the geogrid (5) and the double-twisted steel wire mesh (3) reinforcement pavement technology can enhance the transverse relation between the new roadbed and the old roadbed, eliminate the non-uniform sedimentation of the new and the old roadbeds and reduce the total sedimentation.

Description

technical field [0001] The invention relates to a treatment structure for a joint part of a highway reconstruction and expansion project, in particular to a treatment structure for a joint part of a highway reconstruction and expansion project. Background technique [0002] The construction of new embankments in expressway reconstruction and expansion projects will lead to new differential settlement of the old embankment, and settlement deformation between the new and old embankments, resulting in embankment cracking, road surface damage and other diseases. Among them, the treatment measures for the junction of the old and new embankments Improperness is one of the main reasons for the differential settlement of subgrade widening. The junction of old and new subgrades and pavement is the weakest part of the reconstruction and expansion project, and subgrade diseases are most likely to occur. Usually, engineering and technical measures such as excavation of old road embankme...

Claims

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Application Information

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IPC IPC(8): E01C3/04
Inventor 何忠明谭积青胡庆国覃新江段跃华
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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