CN102011602A - Disc anchor rod reinforcement technology computing method - Google Patents
Disc anchor rod reinforcement technology computing method Download PDFInfo
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- CN102011602A CN102011602A CN2010100005505A CN201010000550A CN102011602A CN 102011602 A CN102011602 A CN 102011602A CN 2010100005505 A CN2010100005505 A CN 2010100005505A CN 201010000550 A CN201010000550 A CN 201010000550A CN 102011602 A CN102011602 A CN 102011602A
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- dish
- anchor
- anchor pole
- diameter
- anchor rod
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Abstract
The invention relates to a disc anchor rod reinforcement technology computing method belonging to the geotechnical engineering research field. In the invention, a plurality of local discs are arranged on the same variable cross-section anchor rod. The whole system is a disc anchor rod system comprising the discs and a rod body, i.e. one anchor disc is added along the length direction of the anchor rod at regular intervals, thereby changing the transfer mode of the traditional anchor rod load and the stress mechanism of the anchor rod; and the diameter of each anchor disc is 5-7.5 times the drilling diameter, thereby improving the bearing capacity of single anchor rod. According to the function characteristics and the bearing characteristics of each disc and the rod body on rock masses, the invention provides a disc anchor rod reinforcement lower rock mass failure mode and a computing method for anchor disc spacing and provides a computing method for the uplift resistance of the disc anchor rod. The technology can effectively improve the uplift resistance of the anchor rod.
Description
One, technical field
The present invention is the stressed mechanism that changes the transfer mode and the anchor pole of traditional anchor pole load along the method that the rock-bolt length direction increases a dish at regular intervals, and anchor dish diameter is 5～7.5 times of bore diameter, thereby improves the bearing capacity of single anchor pole.Be mainly used in the engineering reinforcement in fields such as tunnel or mine working, subway, side slope, pattern foundation pit supporting structure, water conservancy and hydropower reinforcing and underground anti-floating engineering.
Two, technical background
From the domestic and international application situation, the required anchored force of anchorage effect of anchor pole mainly is that the side friction that relies on anchoring section to provide is born at present; The form of anchor pole has multiple, but on action principle, mainly is to take various measures to increase side friction, thereby improves uplift resistance.In addition also have the method at end design enlarged footing to improve anchored force, final purpose is to increase uplift resistance.Study for this reason and explore technical method that increases uplift resistance or the mechanism of action that changes traditional anchoring section anchor pole and surrounding soil, improve the uplift resistance of anchoring section, thereby satisfy the required anchored force of engineering, the novel anchor rod that the disc type anchor pole is developed just under this background.
Three, Fa Ming content
For the uplift resistance that improves anchor pole and the anchoring effect of anchor pole, the disc type anchor pole is to change the stressed mechanism of the transfer mode and the anchor pole of traditional anchor pole load in the rock-bolt length direction every the method that a determining deviation increases an anchor dish, thereby improves the bearing capacity of single anchor pole.Its mainly effect characteristics are to design several hole enlargement bodies along the anchor pole axis direction, the anchored force that is a plurality of hole enlargement bodies is different with the mechanism of action of traditional anchored force, show as not extension diameter section and one " dish " of extension diameter section joint generation, this dish provides bearing capacity and traditional bearing mode that the internal difference is arranged, thereby improves the anchored force of anchor pole.
Its action principle is different with the principle that the high pressure grouting technology improves anchored force; This technical method is squeezed or squeezed and cutting principle of combining with hydraulic pressure, design several expansion dishes along boring diameter of axle direction, promptly along the non-equal diameter of boring length direction, and then pass through concrete perfusion, form enlarged body in the part and promptly form so-called anchor dish, thereby reach the purpose that improves anchored force.
Four, description of drawings
The present invention will be further described below in conjunction with accompanying drawing:
The destruction simplified model of Fig. 1 single-deck anchor pole
Fig. 2 polydisc anchor pole failure mode
Five, the specific embodiment
1) calculating of anchor dish spacing
When the plural anchor dish of design, reasonably coiling spacing is an important indicator of disc type anchor pole design, because the dish spacing is too near, dish will be cut up with the soil body or rock mass between the dish, coils and does not play due effect; Too big as the fruit tray spacing, the soil body does not play one's part to the full; Therefore, the dish spacing need keep optimum distance, and the uplift resistance of polydisc anchor pole is greater than the uplift resistance of plain edition anchor pole, and its minimum disc spacing by formula (1) is calculated:
In the formula: d---bolt diameter (m);
D---anchor dish diameter (m);
f
k---soil bearing capacity standard value (kPa) between dish and the dish;
q
Sk---soil body side friction standard value (kPa) between dish and the dish.
2) the disc type anti-pulling of anchor bar calculates
Disc type anchor rod ultimate uplift resistance is (2) calculating by formula of rounding platform side friction:
In the formula: d---bolt diameter (m);
D---anchor dish diameter (m);
f
k---soil bearing capacity standard value (kPa) between dish and the dish;
q
Sk---soil body side friction standard value (kPa) between dish and the dish;
N---the quantity of anchor dish;
L
i---be i layer soil body thickness (m).
ξ---correction factor, excursion is between 0～1.
Claims (4)
1. the disc type anchor pole is a kind of New Rock engineering reinforcement technology, its technical method is the variable cross-section formula anchor pole that increases a plurality of dishes on same anchor pole, whole system is formed disc type bolt anchorage system jointly by a plurality of dishes and the body of rod, promptly whenever keep at a certain distance away and increase a dish along the rock-bolt length direction, thereby change the stressed mechanism of the transfer mode and the anchor pole of traditional anchor pole load, anchor dish diameter is 5～7.5 times of bore diameter, thereby improves the bearing capacity of single anchor pole.
2. according to right 1 described disc type bolt anchorage technology, its main technical principle is: for the uplift resistance that improves anchor pole and the anchoring effect of anchor pole, the disc type anchor pole is to change the stressed mechanism of the transfer mode and the anchor pole of traditional anchor pole load in the rock-bolt length direction every the method that a determining deviation increases an anchor dish, thereby improves the bearing capacity of single anchor pole.Its mainly effect characteristics are to design several hole enlargement bodies along the anchor pole axis direction, the anchored force that is a plurality of hole enlargement bodies is different with the mechanism of action of traditional anchored force, show as not extension diameter section and one " dish " of extension diameter section joint generation, this dish provides bearing capacity and traditional bearing mode that the internal difference is arranged, thereby improves the anchored force of anchor pole.Its action principle is different with the principle that the high pressure grouting technology improves anchored force; This technical method is squeezed or squeezed and cutting principle of combining with hydraulic pressure, design several expansion dishes along boring diameter of axle direction, promptly along the non-equal diameter of boring length direction, and then pass through concrete perfusion, form enlarged body in the part and promptly form so-called anchor dish, thereby reach the purpose that improves anchored force.
3. according to right 1 described disc type bolt anchorage technology, need to determine the dish spacing, according to geotechnical body standard value of bearing capacity f between bolt diameter d (m), anchor dish diameter D (m), dish and the dish
k(kPa), geotechnical body side friction standard value q between dish and the dish
Sk(kPa); The calculating dial spacing is:
4. according to right 1 described disc type bolt anchorage technology, need to determine the computational methods of disc type anti-pulling of anchor bar.According to geotechnical body standard value of bearing capacity f between bolt diameter d (m), anchor dish diameter D (m), dish and the dish
k(kPa), geotechnical body side friction standard value q between dish and the dish
Sk(kPa), dish number, i layer soil body thickness L
i, ξ-correction factor, excursion is between 0～1; Calculating disc type anchor rod ultimate uplift resistance is that rounding platform side friction is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100005505A CN102011602B (en) | 2010-01-13 | 2010-01-13 | Disc anchor rod reinforcement technology computing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100005505A CN102011602B (en) | 2010-01-13 | 2010-01-13 | Disc anchor rod reinforcement technology computing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102011602A true CN102011602A (en) | 2011-04-13 |
| CN102011602B CN102011602B (en) | 2012-03-21 |
Family
ID=43841912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100005505A Expired - Fee Related CN102011602B (en) | 2010-01-13 | 2010-01-13 | Disc anchor rod reinforcement technology computing method |
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| Country | Link |
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| CN (1) | CN102011602B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470290A (en) * | 2013-09-29 | 2013-12-25 | 北方工业大学 | Circular truncated cone-shaped anchor rod anchoring technology |
| CN112095679A (en) * | 2020-07-29 | 2020-12-18 | 中国电力科学研究院有限公司 | Calculation method and system for uplift bearing capacity of anchor disc of spiral anchor pile |
| CN115467326A (en) * | 2022-08-26 | 2022-12-13 | 天津送变电工程有限公司 | Extruding-expanding drill type ground anchor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6419435B1 (en) * | 2000-07-11 | 2002-07-16 | Paul Gaudron | Wedging masonry anchor bolt and sleeve anchor for masonry bolt used in cinder blocks |
| CN100532736C (en) * | 2007-08-10 | 2009-08-26 | 张立峰 | Concrete anchor stock and construction technique thereof |
| CN101570970A (en) * | 2008-04-07 | 2009-11-04 | 李宪奎 | Construction method of cement soil anchor and anchor plate combined member thereof |
| CN101260669B (en) * | 2008-04-24 | 2010-07-07 | 中国京冶工程技术有限公司 | Drilling, spraying, injection integral enlarging anchor rod construction method |
| CN101550696A (en) * | 2009-05-07 | 2009-10-07 | 中国京冶工程技术有限公司 | Multiple anti-corrosive controllable expansion extrusion soil anchor and construction method |
-
2010
- 2010-01-13 CN CN2010100005505A patent/CN102011602B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470290A (en) * | 2013-09-29 | 2013-12-25 | 北方工业大学 | Circular truncated cone-shaped anchor rod anchoring technology |
| CN103470290B (en) * | 2013-09-29 | 2016-02-24 | 北方工业大学 | The anchor rod anchored device of a kind of circular platform type |
| CN112095679A (en) * | 2020-07-29 | 2020-12-18 | 中国电力科学研究院有限公司 | Calculation method and system for uplift bearing capacity of anchor disc of spiral anchor pile |
| CN115467326A (en) * | 2022-08-26 | 2022-12-13 | 天津送变电工程有限公司 | Extruding-expanding drill type ground anchor |
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| Publication number | Publication date |
|---|---|
| CN102011602B (en) | 2012-03-21 |
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Granted publication date: 20120321 Termination date: 20130113 |