CN102051878A - Novel pressure dispersion anchoring device and method - Google Patents
Novel pressure dispersion anchoring device and method Download PDFInfo
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- CN102051878A CN102051878A CN2009102108630A CN200910210863A CN102051878A CN 102051878 A CN102051878 A CN 102051878A CN 2009102108630 A CN2009102108630 A CN 2009102108630A CN 200910210863 A CN200910210863 A CN 200910210863A CN 102051878 A CN102051878 A CN 102051878A
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- supporting body
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- anchor device
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Abstract
The invention relates to a novel pressure dispersion anchoring device which comprises a plurality of unbonded steel strands, a plurality of cone frustum-shaped metal bearing bodies and a plurality of fixed anchoring devices, wherein each metal bearing body is internally provided with a vertical inner cavity and a connecting plate in the inner bearing body; and the unbonded steel strands respectively pass through the inner bearing bodies and the connecting plates and are correspondingly fixed to the bottom sides of the connecting plates by respectively utilizing the fixed anchoring devices. The invention also discloses an anchoring method of the anchoring device. The method comprises the following steps of: firstly, assembling on the ground to form a plurality of standard anchoring units; secondly, assembling the plurality of standard anchoring units into an integral anchoring cable; and finally, densely filling the interiors of the cone frustum-shaped metal bearing bodies with special high-strength cement mortar so as to guarantee that the bearing bodies cannot be damaged in a process of applying a load. In the invention, the maximum shearing stress value is greatly reduced, meanwhile, the cone bearing bodies generate a transverse extruding effect in a tensioning process, the shearing strength can be improved, and thereby the bearing capacity or the tensile pulling force of the anchoring cable is improved.
Description
Technical field
The present invention is about a kind of novel pressure decentralized anchor device, especially a kind of pressure can the dispersion, improves the decentralized anchor device of shear strength and anchor cable supporting capacity or tension pull out force.
Background technology
Common tension type anchor cable is easy to generate the anchoring section shear stress and concentrates in stretching process, injecting cement paste is subjected to stretched existing crack, thereby has reduced the reliability and the safety of interior anchor head, the incompatibility complex geological conditions, and especially corrosive atmosphere is all the more so.
Generally acknowledge both at home and abroad that at present the pressure dispersing type anchoring process is more scientific and rational.Its main feature is that whole anchor cable load is evenly dispersed on the whole anchoring section, and magnitude of maximum shearing stress is reduced greatly, thereby reaches safe and reliable anchoring effect.Shown in Fig. 1 a-Fig. 1 b, when concentrating on a place as if total load P, its magnitude of maximum shearing stress is τ; When total load P was dispersed in 3 bearing plates so, then the magnitude of maximum shearing stress at each piece bearing plate place was about 1/3 τ.
But, existing pressure dispersing anchorage cable, in the load application process, only on the anchor cable direction towards periphery cement slurry and country rock apply squeezing action, do not have horizontal squeezing action at all.In addition, existing pressure dispersing type anchor device and method, complex process in work progress, and can't form unified standard.
Summary of the invention
The object of the present invention is to provide a kind of pressure dispersing type anchor device and method thereof of dispersive pressure.
Another purpose of the present invention is to provide a kind of pressure dispersing type anchor device and method thereof with high shear strength and high bearing capacity or tension pull out force.
A further object of the present invention is to provide a kind of construction sequence standardization, thereby simplifies the decentralized anchor device and the method thereof of operation pressure.
For achieving the above object, the present invention adopts following technological means:
A kind of novel pressure decentralized anchor device comprises at least:
Several non-bending steel cables;
Several truncated cone metal supporting bodies are provided with vertical internal cavities and are positioned at the junction plate of described internal cavities in it; And
Several are ground tackle fixedly;
Described non-bending steel cable passes described each internal cavities and junction plate respectively, and utilizes described fixedly ground tackle correspondence to be fixed in aforementioned each junction plate bottom side respectively.
A kind of novel pressure decentralized anchoring process of above-mentioned anchor device that uses is, described novel pressure decentralized anchor device is after the ground assembling is finished, truncated cone supporting body inside is closely knit with special high-strength cement mortar filling, is not damaged in the load application process guaranteeing.
Beneficial effect of the present invention is that not only whole anchor cable load is evenly dispersed on the whole anchoring section, and magnitude of maximum shearing stress is reduced greatly, thereby reaches safe and reliable anchoring effect.Also adopted wedge principle simultaneously, change every bearing plate into supporting body, and be designed to normal cone platform shape, like this in the load application process, truncated cone supporting body cement slurry and country rock towards periphery applies horizontal squeezing action, thereby the shear strength of anchoring section is improved, and improved the supporting capacity or the tension pull out force of anchor cable from another point of view again, given full play to the effect of anchoring section.The present invention can make needed anchor cable the anchoring unit of standard, so just can impel the construction sequence standardization, thereby simplifies construction.
Description of drawings
Fig. 1 a: the shearing stress distribution figure that is the pressure-type anchor device.
Fig. 1 b: the shearing stress distribution figure that is the pressure dispersing type anchor device.
Fig. 2: the supporting body that is first embodiment of the invention is arranged schematic diagram.
Fig. 3: the supporting body that is second embodiment of the invention is arranged schematic diagram.
The critical element symbol description:
1. supporting body 2. cavitys 3. non-bending steel cables
4. fixing ground tackle 6. through holes of junction plate 5.
The specific embodiment
This novel pressure decentralized anchor device comprises: several non-bending steel cables 3; Several conical metal supporting bodies 1, its shell is that ductile iron or cast steel material are made, the supporting body tapering is about 1/10, in this truncated cone metal supporting body 1, be provided with vertical internal cavities 2 and junction plate 4, junction plate 4 is positioned at described cavity 2 inside or bottom side, and junction plate 4 is provided with several through holes 6; And several fixing ground tackles 5; Described non-bending steel cable 3 passes described each internal cavities 2 and junction plate 4 respectively, and utilizes described fixedly ground tackle 5 correspondences to be fixed in the bottom side of aforementioned each junction plate 4 respectively.Each supporting body 1 has at least a non-bending steel cable 3 to act on it, when the quantity of no bonding steel strand 3 is one, then arranges between two parties, when the quantity of no bonding steel strand 3 is two when above, then symmetric arrangement can evenly be disperseed load-bearing like this, avoids the situation of unbalance stress.
Supporting body 1 is truncated cone, be to have utilized wedge principle, change former bearing plate into supporting body, and be designed to normal cone platform shape, like this in the load application process, truncated cone supporting body 1 cement slurry and country rock towards periphery applies horizontal squeezing action, thereby the shear strength of anchoring section is improved, improve the supporting capacity or the tension pull out force of anchor cable from another point of view again, given full play to the effect of anchoring section.
It is scheme most preferably that the configuration design of supporting body 1 becomes normal cone platform shape, and the bottom surface diameter of cone is D, and the end face diameter is d, and the height of cone is h, and top half angle of cone is α, and then the tapering of cone is
Be subjected to the tapering on the mating face of axial force and lateral force to be generally 1/12 to 1/8, be preferably 1/10.Obviously, the bottom surface diameter D of cone, end face diameter d and height h thereof can not choose arbitrarily each other.For smooth rope down, bottom surface diameter D needs less than the anchor hole diameter; The size of end face diameter d need be considered fixedly arrangement of ground tackle and passing of twisted wire, and the height h of cone can directly have influence on the size of horizontal extruding force.In a word, the height h of bottom surface diameter D, end face diameter d and the cone of conical supporting body need determine with the method for experimental design.
The number of truncated cone supporting body 1, the stress distribution situation of anchored force as required and requirement can be 1 or several.The layout of several truncated cone supporting bodies 1 in anchoring section has dual mode: monolithic is arranged and separate type is arranged.
With reference to shown in Figure 2, for the supporting body of first embodiment of the invention is arranged schematic diagram, present embodiment is that the monolithic of supporting body 1 is arranged, it is each supporting body 1 equidistant anchor hole axial direction that is arranged in, and it is in aggregates to connect, the non-bending steel cable 3 of every one deck supporting body down 1 carrying all passes the through hole 6 of each supporting body 1 that is positioned at above it, and the load that each supporting body is shared can be arranged arbitrarily to adjust.Anchor device according to this kind arrangement mode is applicable to the rock stratum ground that globality is more complete.
With reference to shown in Figure 3, for the supporting body of second embodiment of the invention is arranged schematic diagram.In present embodiment, roughly the same among the structure of this novel pressure decentralized anchor device, structure and first embodiment, just wherein the junction plate 4 of supporting body 1 is positioned at described cavity 2 inside.
Present embodiment is that the separate type of supporting body 1 is arranged, be that each supporting body 1 separates each other, equidistant or non-equidistant arrangement, the non-bending steel cable 3 of every one deck supporting body down 1 carrying all passes the through hole 6 of each supporting body 1 that is positioned at above it, and the load that each supporting body is shared can be arranged arbitrarily to adjust.Be applicable to rock stratum ground than weak broken according to the anchor device of this kind arrangement mode, the position of adjusting supporting body 1 according to the distribution of the rock stratum ground fragment of reality is more flexible.
The method of making above-mentioned novel pressure decentralized anchor device is: at first, earlier above-mentioned novel pressure decentralized anchor device is assembled outside anchor hole and made standard anchoring unit, each supporting body 1 and one or several non-bending steel cable 3 have just constituted (comprising fixedly ground tackle 5 of end) an anchoring unit of interior anchor head, several anchoring unit have then constituted the interior anchor head structure of novel pressure dispersed anchor cable, the anchor hole of during use whole standard anchoring unit being packed into.Owing to needed anchor cable can be made the anchoring unit of standard, so just can impel the construction sequence standardization, thereby simplify construction.After treating that assembling is finished, supporting body 1 inside is closely knit with special high-strength cement mortar filling, is not damaged in the load application process guaranteeing, can play double-deck protective action to the fixing connecting portion of ground tackle 5 and no bonding steel strand 3 simultaneously.The shell of supporting body 1 wherein is ductile iron or cast steel material.
The present invention has also adopted wedge principle except that the advantage (making shearing stress distribution be tending towards even) of the decentralized that keep-ups pressure, with the shear strength of raising anchoring section, thus the decentralized anchor device of raising anchor cable supporting capacity or tension pull out force.
Claims (9)
1. novel pressure decentralized anchor device is characterized in that comprising at least:
Several non-bending steel cables;
Several truncated cone metal supporting bodies are provided with vertical internal cavities and are positioned at the junction plate of described internal cavities in it; And
Several are ground tackle fixedly;
Described non-bending steel cable passes described each internal cavities and junction plate respectively, and utilizes described fixedly ground tackle correspondence to be fixed in aforementioned each junction plate bottom side respectively.
2. novel pressure decentralized anchor device as claimed in claim 1 is characterized in that: the junction plate of described supporting body is positioned at the middle part or the bottom side of described internal cavities, and described junction plate is provided with several through holes.
3. novel pressure decentralized anchor device as claimed in claim 1 is characterized in that: described supporting body tapering is 1/12 to 1/8.
4. novel pressure decentralized anchor device as claimed in claim 3 is characterized in that: described supporting body tapering is 1/10.
5. novel pressure decentralized anchor device as claimed in claim 1 is characterized in that: the shell of described supporting body is ductile iron or cast steel material.
6. novel pressure decentralized anchor device as claimed in claim 2, it is characterized in that: the equidistant or non-equidistant anchor hole axial direction that is arranged in of described supporting body, and it is in aggregates to connect, and the non-bending steel cable in every one deck supporting body down all passes the through hole of each supporting body that is positioned at above it.
7. as each described novel pressure decentralized anchor device of claim 1-6, it is characterized in that: described each supporting body has a non-bending steel cable effect at least on it, a non-bending steel cable is arranged on the described junction plate between two parties, and two above non-bending steel cables then are symmetrically arranged on the described junction plate.
8. use the novel pressure decentralized anchoring process of each described anchor device of claim 1-6, it is characterized in that: described novel pressure decentralized anchor device is after the ground assembling is finished, truncated cone supporting body inside is closely knit with special high-strength cement mortar filling, is not damaged in the load application process guaranteeing.
9. novel pressure decentralized anchoring process as claimed in claim 8, it is characterized in that: described novel pressure decentralized anchor device is the standard anchoring unit made of assembling outside anchor hole, reinstalls in the anchor hole after during use each standard block being assembled into whole anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102108630A CN102051878A (en) | 2009-11-11 | 2009-11-11 | Novel pressure dispersion anchoring device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102108630A CN102051878A (en) | 2009-11-11 | 2009-11-11 | Novel pressure dispersion anchoring device and method |
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| CN102051878A true CN102051878A (en) | 2011-05-11 |
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| CN2009102108630A Pending CN102051878A (en) | 2009-11-11 | 2009-11-11 | Novel pressure dispersion anchoring device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711508A (en) * | 2014-01-20 | 2014-04-09 | 山东科技大学 | Highly-shearing-resistant anchor rod with mutually matched steel wire ropes and circular truncated cone bodies |
| CN103924590A (en) * | 2014-04-16 | 2014-07-16 | 中铁第四勘察设计院集团有限公司 | Design method for pressure type anchor cable |
| CN105544392A (en) * | 2015-12-22 | 2016-05-04 | 中国科学院武汉岩土力学研究所 | Root key type pressure bearing mechanism in anchor hole, assembling method, root key type anchor cable and method for grouting anchor hole |
| CN112556891A (en) * | 2020-11-20 | 2021-03-26 | 中国水利水电科学研究院 | Concrete whole life period internal stress state monitoring device based on film type sensor |
-
2009
- 2009-11-11 CN CN2009102108630A patent/CN102051878A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711508A (en) * | 2014-01-20 | 2014-04-09 | 山东科技大学 | Highly-shearing-resistant anchor rod with mutually matched steel wire ropes and circular truncated cone bodies |
| CN103924590A (en) * | 2014-04-16 | 2014-07-16 | 中铁第四勘察设计院集团有限公司 | Design method for pressure type anchor cable |
| CN103924590B (en) * | 2014-04-16 | 2015-12-30 | 中铁第四勘察设计院集团有限公司 | A kind of method for designing of pressure anchor wire |
| CN105544392A (en) * | 2015-12-22 | 2016-05-04 | 中国科学院武汉岩土力学研究所 | Root key type pressure bearing mechanism in anchor hole, assembling method, root key type anchor cable and method for grouting anchor hole |
| CN105544392B (en) * | 2015-12-22 | 2017-01-04 | 中国科学院武汉岩土力学研究所 | Root keyed bearing mechanism and assemble method in anchor hole, root keyed anchor cable, method to anchor hole slip casting |
| US9783948B2 (en) | 2015-12-22 | 2017-10-10 | Institute Of Rock And Soil Mechanics, Chinese Academy Of Sciences | Root key type pressure bearing mechanism in anchor hole, root key type anchor cable and anchor hole grouting method |
| CN112556891A (en) * | 2020-11-20 | 2021-03-26 | 中国水利水电科学研究院 | Concrete whole life period internal stress state monitoring device based on film type sensor |
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Application publication date: 20110511 |