CN102635376A - Method for repairing collapsed hole of drilled hole of rock anchor rod - Google Patents
Method for repairing collapsed hole of drilled hole of rock anchor rod Download PDFInfo
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- CN102635376A CN102635376A CN2012101207452A CN201210120745A CN102635376A CN 102635376 A CN102635376 A CN 102635376A CN 2012101207452 A CN2012101207452 A CN 2012101207452A CN 201210120745 A CN201210120745 A CN 201210120745A CN 102635376 A CN102635376 A CN 102635376A
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- hole
- anchor
- mortar
- anchor rod
- rock
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Abstract
The invention discloses a method for repairing a collapsed hole of a drilled hole of a rock anchor rod. The method comprises the following steps of: after finding out the collapsed hole of a tunnel rock anchor hole, repeatedly cleaning the hole by utilizing an air pick; meanwhile, blowing out crushed scrapes in the hole by utilizing high-pressure air of the air pick; then, pressing quickly-condensed mortar which is not less than C30 mark into the anchor hole by utilizing a grouting machine; keeping a load for 5 minutes under the condition that the pressure is maintained below 1.2 MPa; after 1 day, reforming a hole on the previous anchor hole; after cleaning the hole, placing a water-immersed anchored cartridge bag; and rotatably inserting the anchor rod to finish the anchoring of the anchor rod. By using the method, surrounding rocks at the periphery of the anchor rod can form a whole body so as to obviously improve the pulling resistance of the anchor rod.
Description
Technical field
The present invention relates to the collapse method in hole of a kind of novel reparation multiple-arch tunnel anchor pole anchor hole, be specifically related to the collapse restorative procedure in hole of a kind of hollow grouting anchor or ordinary mortar anchor pole.
Technical background
Hollow grouting anchor and ordinary mortar anchor pole are widely used in engineerings such as construction of tunnel, deep-foundation pit engineering, side slope protection at present.In the work progress of anchor pole, the hole quality of anchor hole has material impact to the uplift resistance of anchor pole, especially the processing in the hole of collapsing is more wanted prudent, if deal with improperly, can cause anchor pole to lose efficacy, and causes quality accidents.Current, in the construction of multiple-arch tunnel, because country rock changeable, the anchor hole hole phenomenon of collapsing very easily appears in crushing rock formation location especially.To the collapse common practices in hole of tunnel anchor hole be now: after carrying out cleaning bottom of hole, clear hole with pneumatic pick, fill in immersion anchoring cartridge bag, anchor pole is inserted in rotation, carries out anchor rod anchored.The deficiency that this method exists is: can not reinforce the breaking surrounding rock of anchor pole periphery, because the anchor pole peripheral rock exists crack, broken phenomenon, thereby reduce the uplift resistance of anchor pole significantly, very the person can not meet design requirement.
Summary of the invention
In order to handle the tunnel anchor pole anchor hole hole of collapsing well, guarantee that the tunnel anti-pulling of anchor bar reaches designing requirement, guarantee engineering safety, the present invention provides a kind of collapse method in hole of rock matter armature boring of repairing.
It is design like this that the present invention repairs the collapse method in hole of rock matter armature boring: find that tunnel rock matter anchor hole collapses behind the hole; Earlier with pneumatic pick cleaning bottom of hole repeatedly; High-pressure blast with pneumatic pick blows out the chip in the hole simultaneously, till the visible dust of no naked eyes goes out from the hole internal return with high-pressure blast.The quick-setting mortar that will be not less than the C30 label with pneumatic mortar machine subsequently is pressed in the anchor hole fast, is keeping holding lotus 5 minutes under the 1.2MPa pressure, impels mortar fully to flow in the crack of breaking surrounding rock around the anchor pole, and guarantees that mortar is full closely knit in the hole.After 1 day, the pore-forming at former anchor hole place behind the clear hole, is put into immersion anchoring cartridge bag again, and anchor pole is inserted in rotation, accomplishes anchor rod anchored.
The present invention repairs the collapse method in hole of rock matter armature boring can make the anchor pole peripheral rock form an integral body, thereby obviously improves the uplift resistance of anchor pole.
The specific embodiment
The present invention repairs the rock matter armature boring technical scheme that the method in hole takes of collapsing:
The first step: rock matter anchor hole collapses behind the hole, and with pneumatic pick cleaning bottom of hole repeatedly, the high-pressure blast with pneumatic pick blows out the chip in the hole simultaneously earlier, until no naked eyes till it is thus clear that dust goes out from the hole internal return with high-pressure blast.
Second step: by laboratory proportioning preparation quick-setting mortar.The quick-setting mortar performance: the mortar water/binder ratio is controlled at 0.4-0.5; Initial setting time: 5 minutes; Final setting time: 12 minutes; : 1 day compressive strength: greater than 15MPa.
The 3rd step: the quick-setting mortar that will be not less than the C30 label with pneumatic mortar machine is pressed in the anchor hole fast, is keeping holding lotus 3 minutes under the 1.2MPa pressure.Impel mortar fully to flow in the crack of breaking surrounding rock around the anchor pole, and guarantee that mortar is full closely knit in the hole.
The 4th step: after 1 day, the pore-forming at former anchor hole place, and clear hole again.
The 5th step: put into immersion anchoring cartridge bag in the anchor hole, anchor pole is inserted in rotation, accomplishes anchor rod anchored.
Patent application example of the present invention:
(1) Wai Tun tunnel, centre, Guangxi Bai Jing speedway Gansu Province adopts patent of the present invention.
This tunnel is positioned at Wai Tun village, centre, Gansu Province, Dong Jing township, Bose City Tianyang County, is close to the quiet extremely at village level highway in flat village in hole, only 10 meters of the about 120m of maximum buried depth, minimum buried depth.The beginning and the end mileage is K16+164～K16+576, total length 412m.Wherein open cut tunnel is 9 meters, 163 meters of V+ level shallow embeddings, buried 20 meters of V level, buried 220 meters of IV level, rock crusher, cranny development.Country rock sections at different levels are used Φ 25 hollow grouting anchors, Φ 22 solid anchor poles respectively.
Broken because of this tunnel surrounding, cranny development, the anchor hole hole frequency of collapsing is higher, 86 holes, hole of collapsing altogether, full tunnel.After adopting patent of the present invention to handle, all obtained effect well, the anti-pulling of anchor bar check all meets design requirement, and has guaranteed the quality and the safety of constructing tunnel.
(2) tunnel, the wide bright young mountain of speedway extended line engineering society.This tunnel is positioned at night watch tower Zhen Yao village, Fushan City, Guangdong Province, and outlet is positioned at Tang Hua village, night watch tower town, and the tunnel passes low and slow hills, and hypsography is big, the about 55～130m of ground level, the about 62m of the maximum buried depth in tunnel.The tunnel beginning and end pile No. is K83+045 ~ K83+337, and 292 meters of total lengths are a six-lane arcading short tunnel.
The tunnel is in V, IV level country rock location, rock crusher, cranny development.48 holes, hole of collapsing altogether in the full constructing tunnel.After adopting patent of the present invention to handle, all obtained effect well, the anti-pulling of anchor bar check all meets design requirement, and has guaranteed the quality and the safety of constructing tunnel.
The invention has the beneficial effects as follows, can make the breaking surrounding rock of anchor pole periphery form an integral body, thereby obviously improve the uplift resistance of anchor pole.
Claims (1)
1. repair the collapse method in hole of rock matter armature boring for one kind, its step is following:
The first step: rock matter anchor hole collapses behind the hole, and with pneumatic pick cleaning bottom of hole repeatedly, the high-pressure blast with pneumatic pick blows out the chip in the hole simultaneously earlier, until no naked eyes till it is thus clear that dust goes out from the hole internal return with high-pressure blast;
Second step: the preparation quick-setting mortar, the quick-setting mortar performance: the mortar water/binder ratio is controlled at 0.4-0.5; Initial setting time: 5 minutes; Final setting time: 12 minutes; 1 day compressive strength: greater than 15Mpa;
The 3rd step: with pneumatic mortar machine quick-setting mortar is pressed in the anchor hole fast, is keeping holding lotus 3 minutes under the 1.2MPa pressure;
Impel mortar fully to flow in the crack of breaking surrounding rock around the anchor pole, and guarantee that mortar is full closely knit in the hole;
The 4th step: after 1 day, the pore-forming at former anchor hole place, and clear hole again;
The 5th step: put into immersion anchoring cartridge bag in the anchor hole, anchor pole is inserted in rotation, accomplishes anchor rod anchored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101207452A CN102635376A (en) | 2012-04-24 | 2012-04-24 | Method for repairing collapsed hole of drilled hole of rock anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101207452A CN102635376A (en) | 2012-04-24 | 2012-04-24 | Method for repairing collapsed hole of drilled hole of rock anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102635376A true CN102635376A (en) | 2012-08-15 |
Family
ID=46619937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101207452A Pending CN102635376A (en) | 2012-04-24 | 2012-04-24 | Method for repairing collapsed hole of drilled hole of rock anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102635376A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362847Y (en) * | 2009-02-23 | 2009-12-16 | 成都现代万通锚固技术有限公司 | Circulating pressure grouting system for hollow anchor rod |
| CN102644471A (en) * | 2012-04-20 | 2012-08-22 | 天地科技股份有限公司 | Hole sealing machine and hole sealing method using hole sealing machine to perform small aperture grouting for anchoring anchor rope |
-
2012
- 2012-04-24 CN CN2012101207452A patent/CN102635376A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362847Y (en) * | 2009-02-23 | 2009-12-16 | 成都现代万通锚固技术有限公司 | Circulating pressure grouting system for hollow anchor rod |
| CN102644471A (en) * | 2012-04-20 | 2012-08-22 | 天地科技股份有限公司 | Hole sealing machine and hole sealing method using hole sealing machine to perform small aperture grouting for anchoring anchor rope |
Non-Patent Citations (2)
| Title |
|---|
| 刘金秋等: "岩石破碎带处锚杆的施工技术", 《探矿工程(岩土钻掘工程)》 * |
| 叶国华: "锚杆钻成孔塌孔的处理方法与预防措施", 《中国西部科技》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120815 |