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A grouting method for saving the amount of grouting in tensioned sections of prestressed anchor cables

A prestressed anchor cable and anchor cable technology, which is applied in the direction of earthwork drilling, installation of anchor rods, sheet pile walls, etc., can solve the problems of large slurry consumption, waste, and increased project investment, so as to reduce project investment and overcome The effect of large slurry volume and reducing the amount of slurry leakage

Active Publication Date: 2016-06-15
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When grouting the stretching section, the stretching section is not equipped with any anti-leakage measures, and grout leakage often occurs, and the grout consumption is particularly large, and even the drill hole cannot be filled.
In the case that there is no need to grout the interior of the slope, pouring too much grout will lead to an increase in project investment and waste

Method used

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  • A grouting method for saving the amount of grouting in tensioned sections of prestressed anchor cables
  • A grouting method for saving the amount of grouting in tensioned sections of prestressed anchor cables

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the scope of protection is not limited to the content described in this embodiment.

[0019] A grouting method for saving the amount of grouting in tension sections of prestressed anchor cables, comprising the following steps:

[0020] 1) Anchor cable drilling: the drilling equipment should be able to adapt to complex geological conditions, the drilling position error is less than 10cm, the inclination and azimuth of the drilling tool are strictly controlled when drilling, and the angle is checked after drilling 20-30cm. Measure the hole inclination in time during drilling and correct the deviation in time. The deviation of the axis of the final hole shall not exceed 2% of the hole depth, and the deviation of the azimuth angle shall not exceed 3°. , at the same time, measure the hole direction, measure once every 5m to 10m, and correct it in ...

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Abstract

The invention relates to a grouting method for saving the amount of grouting in a stretched section of a prestressed anchor cable, and belongs to the technical field of geotechnical engineering. The method includes the following steps: drilling the anchor cable; determining the length of the anchor cable in the final hole; installing the anchor cable; making the anchor cable body and the outer anchor pier; grouting the inner anchor section, tensioning and grouting the tension section; In the present invention, the anchor cable body of the tension section in the prestressed anchor cable structure is wrapped with a geotextile bag, and the grout for this section of grouting is poured into the geotextile bag to reduce the amount of grout leakage, thereby saving the amount of grout injection, reducing waste and reducing waste. With project investment, it is economically feasible.

Description

technical field [0001] The invention relates to a grouting method for a stretched section of a prestressed anchor cable, in particular to a grouting method for saving the grouting amount of the stretched section of a prestressed anchor cable, and belongs to the technical field of geotechnical engineering. Background technique [0002] In geotechnical engineering, many natural slopes, artificial excavation slopes and underground caverns need to be reinforced with prestressed anchor cables. Cable length—making the anchor cable body and outer anchor pier—threading the cable (installing the anchor cable)—grouting the inner anchorage section—tensioning—grouting the tensioning section—sealing the anchor. [0003] It can be seen from the above construction process that the prestressed anchor cable structure needs to grout the inner anchorage section and the tension section. During the construction process, it is often encountered that the interior of the overburden slope is loose ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74E02D15/04E21D20/00
Inventor 李刚雷有栋陈海坤王联斌杨平李社凤石文杰
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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