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A method for removing prestressed anchor cable frame beams on roadbed slopes

A technology of prestressed anchor cables and frame beams, which is applied in roads, excavations, roads, etc., can solve the problems of unsuitable road subgrade widening and reconstruction construction, high safety risks of frame beams, and complicated technological processes, so as to avoid digging and breaking steel strands line, improve excavation efficiency, simple construction process

Active Publication Date: 2022-03-01
CHINA RAILWAY NO 5 ENG GRP MECHANICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the prestressed anchor cable frame beam, due to the existence of the frame beam, if the anchor cable drilling rig is used for demolition, the frame beam must be broken first before drilling, and the process is extremely complicated, the construction cost is high, and the progress is slow; The existence of the anchor cable, if the effective internal stress of the anchor cable is not released first, the safety risk of the frame beam breaking operation is extremely high
Therefore, the existing method is not suitable for roadbed widening and reconstruction construction.

Method used

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  • A method for removing prestressed anchor cable frame beams on roadbed slopes
  • A method for removing prestressed anchor cable frame beams on roadbed slopes
  • A method for removing prestressed anchor cable frame beams on roadbed slopes

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Effect test

Embodiment 1

[0038] The invention provides a method for removing prestressed anchor cable frame beams on roadbed slopes, such as Figure 1 to Figure 6 As shown, it includes the combination of dismantling the supporting structure of the existing subgrade slope and the excavation of the widened subgrade slope, by excavating the vertical soil groove 6 and the horizontal soil groove 7 layer by layer at the top of the existing roadbed slope, Divide the soil mass of the side slope to be excavated for widening of the subgrade into multiple independent areas along the longitudinal and transverse directions, and use the elastic deformation of the soil mass to release the effective internal stress of the prestressed anchor cable 1, thereby ensuring the removal of the prestressed anchor cable frame beam Operational security, specifically including the following steps:

[0039] S1. Construction preparation, the surveyors release the inner boundary line at the top of the slope according to the widened ...

Embodiment 2

[0064] Such as Figure 1 to Figure 6 As shown, in this example:

[0065] Step S1, construction preparation, specifically, the surveyors release the inner boundary line at the top of the slope according to the widened subgrade slope line 5, build a construction access road, and use an excavator to brush the inner boundary line; from the inner boundary line of the slope top to the outside Level the site on the top of the existing embankment slope to form a work area, and mark the longitudinal mileage position of the prestressed anchor cable 1 in the leveled work area, where the longitudinal mileage position specifically refers to the direction of the first layer of prestressed anchor cable 1 along the road In order to prevent the anchor clips of the prestressed anchor cable 1 from being accidentally bounced off, a protective cover is covered above the head end 3 of the prestressed anchor cable 1, and the protective cover is made of a 20mm thick steel plate.

[0066] Step S2, sp...

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Abstract

The invention provides a method for dismantling prestressed anchor cable frame beams of roadbed slopes. When the prestressed anchor cable frame beam composite support structure of existing roadbed slopes is removed, the longitudinal soil is excavated layer by layer at the top of the slope. Grooves and transverse soil grooves divide the slope soil to be excavated for widening of the subgrade into multiple independent areas along the vertical and horizontal directions, and use the elastic deformation of the soil to release the effective internal stress of the prestressed anchor cables, and then carry out the frame beam The demolition of the roadbed, as well as the excavation and removal of the slope soil to widen the roadbed, and then cut off the prestressed anchor cables. The invention can ensure the safety of the demolition operation of the prestressed anchor cable frame beam, the construction process is simple, the operation is simple, no professional and large-scale drilling equipment and a professional construction team are required, the cost is low, and the construction progress is fast. The anchor cables that have released the effective internal stress in the body can still play a certain role in strengthening the slope of the widened subgrade.

Description

technical field [0001] The invention relates to the technical field of roadbed widening and reconstruction engineering, in particular to a method for removing prestressed anchor cable frame beams on roadbed slopes. Background technique [0002] With the rapid development of the country's economy and society, the demand for road traffic has grown rapidly, and a considerable part of the original roads at all levels can no longer meet the new needs and need to be rebuilt and expanded. Widening, rebuilding and upgrading the original old roads can not only reduce the construction cost, shorten the construction period, but also occupy less land, which is conducive to environmental protection. For road sections with high slopes, in the process of roadbed widening and reconstruction, the original slope protection measures must be removed and re-applied. Prestressed anchor cable frame beam is a composite support structure composed of prestressed anchor cable and concrete frame beam,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02E02D17/20E02D5/74E01C3/00
CPCE02D17/02E02D17/202E02D5/74E01C3/00E02D2300/0029
Inventor 陈勇张斌刘勇赵阳阳伍彦斌吴波
Owner CHINA RAILWAY NO 5 ENG GRP MECHANICAL ENG
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