CN202866841U - Pull and press coupling type high, strong and big deformation anchor rod - Google Patents
Pull and press coupling type high, strong and big deformation anchor rod Download PDFInfo
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- CN202866841U CN202866841U CN 201220487119 CN201220487119U CN202866841U CN 202866841 U CN202866841 U CN 202866841U CN 201220487119 CN201220487119 CN 201220487119 CN 201220487119 U CN201220487119 U CN 201220487119U CN 202866841 U CN202866841 U CN 202866841U
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Abstract
The utility model discloses a pull and press coupling type high strong big deformation anchor rod. The pull and press coupling type high, strong and big deformation anchor rod is mainly composed of an anchor rod body, a tray and a nut. An outer anchor fixed section is formed by fastening through the nut outside a hole, and an inner anchor fixed section is formed by sticking the anchor rod body inside the hole after the hole is filled with anchoring agents. The surface of the anchor rod body in the inner anchor fixed section is divided into two states, a section which is close to a hole opening is in a smooth round state, and a section which is close to a hole bottom is in a rough state. A smooth round shape rod body composes a temporary inner anchor fixed section which is also known as to-be free section, and a rough rod body composes a permanent inner anchor fixed section. A rod body which is located in a junction of the permanent inner anchor fixed section and the temporary inner anchor fixed section is provided with a bearing table. The pull and press coupling type high strong big deformation anchor rod has the advantages of obviously optimizing the stress state of the anchor rod which is applied on the spot, being simple in structure and significantly improving reliability and supporting effect of the anchor rod under the condition of not influencing construction efficiency and slightly increasing cost.
Description
Technical field
The utility model relates to the anchor pole that supporting is used in the engineerings such as a kind of water conservancy and hydropower, side slope, tunnel and mine, relates in particular to a kind of high-strength prestressed deformable anchor pole and using method thereof.
Background technology
In the engineering support processes such as mine, water conservancy and hydropower, side slope and tunnel, anchor pole is to use a lot of a kind of support equipments.Along with mining depth constantly increases and the on a large scale construction of underground construction, the geological conditions that faces becomes increasingly complex, characteristics heavily stressed, large deformation that country rock often shows.This situation requires the existing higher anchored force of anchor pole, has again good deformation performance.
Anchor pole can be divided into two classes according to the residing stress state of grouting body, and a class is the tension type anchor pole, and another kind of is pressure type anchor rod.
The tension type anchor pole as shown in Figure 1, mainly formed by anchor bar body 1, pallet 2 and nut 3, the anchor bar body 1 general screwed reinforcement fabrication of total length that adopts, after tightening up, hole external application nut 3 is outer anchoring section c, be bonded as the interior anchoring section e of tension type with anchor bar body 1 after filling with Anchor Agent 5 in the hole, belong to full length fastening formula anchor pole; Have in order to apply prestressing force, have one section not fill with Anchor Agent as free segment in the hole.Tension type rockbolt stress characteristics be its load be in relying on the shear stress on the anchoring section body of rod and the interface that the grouting body contacts by the outer end to the bottom transmission.When this tension type anchor pole is worked under condition of high ground stress, shear stress between the body of rod-slurry-hole wall distributes very inhomogeneous vertically, there is serious stress concentration phenomenon in interior anchoring section outer end, thereby easily cause outer end anchoring body drawing crack, effective anchoring section to move in continuing, cause the anchoring body progressive destruction, finally cause the anchor pole failure damage, so the anchored force that simple tension type anchor pole can provide is limited.In addition, because interior anchoring section body of rod rough surface, combine closely with Anchor Agent and not easily separated, when country rock produces the crack, can separate to bring into play the body of rod limited length of deformation performance with Anchor Agent, fracture destroyed when deflection reached the 30mm left and right sides, requirement that can not the suitable for surrounding rock large deformation.
Pressure type anchor rod as shown in Figure 2, mainly the supporting body 8 by anchor bar body 1, pallet 2, nut 3 and bottom forms, after tightening up, hole external application nut 3 is outer anchoring section c, fill with Anchor Agent 5 in the hole, anchor bar body 1 surface is covered with plastic interlayer 9, thereby bonds with Anchor Agent 5 nothings, so as free segment d, anchor bar body 1 bottom is provided with supporting body 8, and therefore supporting body 8 Anchor Agent anchoring belongs to end anchor formula; Such as Chinese patent CN101586466B, when anchor bar body is stressed, pulling force directly by reaching bottom supporting body 8 without Grouted bolt body 1, applies compressive stress by supporting body to injecting cement paste, rely on the grouting body and on every side the shearing drag between Rock And Soil provide anchor pole required bearing capacity.During this anchor pole load-bearing, interior anchoring section pressurized, not easy to crack, overcome the shortcoming of tension type anchor pole.But the bearing capacity of interior anchoring section is subject to the restriction of shear strength between the compressive strength of Anchor Agent own and Anchor Agent and hole wall, is difficult to the bearing capacity that reaches higher.
In order to make anchor pole have large deformation character, present large deformation anchor rod generally is by frame for movement such as friction sleeve pipe etc. is set, realize bolt deformation by the slip between the body of rod and these structural members, such as Chinese patent CN101858225A, 201110061303.0,201210020742.1,201110187361.8 etc., these large deformation anchor rod complex structures, cost is higher.
The utility model content
The purpose of this utility model is the anchoring unit of tension type and pressure type anchor rod is combined, and with the raising anchor-holding force of anchor bolt, and makes it have large deformation character, provides a kind of tension and compression coupling type high-strength large deformation anchor rod.
Its technical solution is:
The high-strength large deformation anchor rod of a kind of tension and compression coupling type mainly is comprised of anchor bar body, pallet and nut, and hole external application nut tightens up rear as outer anchoring section, bonds as interior anchoring section with anchor bar body behind the filling Anchor Agent in the hole; It is characterized in that: the anchor bar body surface of interior anchoring section is two states, and that section in close aperture is light circle shape, is coarse shape near that section at the bottom of the hole; The light circle shape body of rod consists of interim interior anchoring section, also is called " accurate free segment ", anchoring section in coarse shape body of rod formation is permanent; In permanent anchoring section and temporarily in the body of rod of two sections boundaries of anchoring section be provided with force-bearing table.
The described coarse shape body of rod refers to that preferably body of rod surface is threaded or the body of rod is twisted shape, it can with the Anchor Agent strong bonded, not easily separated.
For the ease of the installation of anchor pole, described force-bearing table is a member that is connected on the anchor bar body.Force-bearing table is configured with various ways, below only enumerates two kinds:
1) force-bearing table is that the several sections that are welded on around the anchor bar body are trapezoidal circular cone, and the circular cone equiblibrium mass distribution leaves the slip casting passage between the adjacent a pair of circular cone.
2) force-bearing table is that the section that is welded on the anchor bar body is semiorbicular circular cone.
For preventing that the outer anchoring section body of rod from beginning to extend front the surrender at " accurate free segment ", outer anchoring section anchor bar body intensity should greater than interior anchoring section anchor bar body intensity, can be taked one of following measures:
1) body of rod of external anchoring section is heat-treated when the processing anchor pole.
2) select the rod body material of two kinds of varying strengths to link together.
3) the outer anchoring section body of rod diameter of anchor bar body is greater than accurate free segment body of rod diameter.
For preventing that the outer anchoring section body of rod from beginning to extend front the surrender at " accurate free segment ", the body of rod that can also locate in the aperture light circle shape arranges force-bearing table, and is stressed to reduce outer anchoring section.
For the size of coordinated allocation to the power of force-bearing table and the interior anchoring section body of rod, prevent one of them too early destruction, force-bearing table arranges elastic cushion block near anchor hole one side on the body of rod; Suitably adjust its thickness to reach the body of rod purpose that Coupling Deformation, stress equilibrium distribute before and after force-bearing table according to the modulus of elasticity of cushion block; Elastic cushion block links to each other with force-bearing table.
One of using method of the present utility model is:
1) at first beat anchor hole in treating the supporting rock mass, the anchor hole diameter should be greater than the external diameter of force-bearing table described in the utility model;
2) put into successively rapid hardening resin anchoring cartridge and slow setting anchoring cartridge in anchor hole, make anchor pole insert the rapid solidification anchor agent that is of rear force-bearing table inboard, outside the force-bearing table is slow solidification anchor agent;
3) by roof bolting machine the anchor pole rotation is pressed into anchor hole, anchoring cartridge is squeezed and breaks and even mix, after low speed solidifying Anchor Agent in hole solidifies, anchor pole is applied certain prestressing force, and the fixing outer anchoring section of fastening nut; Outside slow solidification anchor agent slowly solidifies afterwards, and anchor pole is played the second consolidation effect.
Two of using method of the present utility model is:
1) at first beat anchor hole in treating the supporting rock mass, the anchor hole diameter should be greater than the external diameter of force-bearing table described in the utility model;
2) anchor pole is inserted anchor hole, then mortar is injected anchor hole, after mortar solidifies, anchor pole is applied certain prestressing force, and the fixing outer anchoring section of fastening nut.
The utility model operating principle is: when country rock generation large deformation, can produce pulling force to anchor bar body, because that section near the aperture is light circle shape, under the pulling force effect, separate with Anchor Agent, become " free segment ", the tension elongation has adapted to the characteristics of country rock large deformation, and has absorbed a large amount of surrouding rock deformation energy under the higher working resistance state of maintenance; When pull transfer arrives force-bearing table, force-bearing table is delivered to country rock with a part of power, and another part power then is delivered to permanent interior anchoring section, and force-bearing table plays the stress dispersion effect, anchoring section is surrendered prior to " accurate free segment " in having prevented forever, has guaranteed the performance of free segment deformation properties.Force-bearing table has also limited the displacement of the interior anchoring section body of rod, has prevented the anchoring body progressive destruction that shear stress concentration causes, makes the suffered shearing of anchoring body obtain more rational distribution, has improved the maximum Support Resistance that anchor pole can provide.
Being also advantageous in that of the high-strength large deformation anchor rod of tension and compression coupling type of the present utility model:
1) the utility model is coupled tension type anchor pole and pressure type anchor rod, jointly shares rockbolt stress, has improved the limit anchoring force of anchor pole, has realized the purpose of anchor pole " high-strength ".
2) the utility model can apply a certain amount of prestressing force by stretch-draw, and anchor pole produces pressure to country rock and pair has positive role with the shear strain of opposing rock mass like this.
3) the utility model has obviously been optimized the stress when anchor pole is used at the scene, and is simple in structure, can not affect efficiency of construction, and cost increases in few situation, significantly improves reliability and the supporting effect of anchor pole.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing and the specific embodiment:
Fig. 1 is existing tension type anchor pole schematic diagram;
Fig. 2 is existing pressure type anchor rod schematic diagram;
Fig. 3 is the high-strength large deformation anchor rod schematic diagram of tension and compression coupling type of the present utility model;
Fig. 4 is that the high-strength large deformation anchor rod of tension and compression coupling type of the present utility model arranges the force-bearing table schematic diagram in the aperture;
Fig. 5 is that the high-strength large deformation anchor rod of tension and compression coupling type of the present utility model is at force-bearing table arranged outside elastic cushion block schematic diagram;
Fig. 6 is the stereogram of a kind of embodiment of the utility model force-bearing table;
Fig. 7 is the stereogram of the another kind of embodiment of the utility model force-bearing table.
Marginal data, 1-anchor bar body, 2-pallet, the 3-nut, 4-force-bearing table, 5-Anchor Agent, the circular cone that 6-is trapezoidal, the semiorbicular circular cone of 7-, 8-low side supporting body, the 9-plastic interlayer, 10-aperture force-bearing table, 11-elastic cushion block, 12-slip casting passage, anchoring section in a-is permanent, anchoring section in b-is interim, the outer anchoring section of c-, anchoring section in the d-free segment, e-tension type.
The specific embodiment
Fig. 1 and Fig. 2 are respectively the schematic diagrames of existing tension type anchor pole and pressure type anchor rod, and its structure no longer describes in detail.
Below in conjunction with Fig. 3-Fig. 7 the technical solution of the utility model is described.
As shown in Figure 3, the high-strength large deformation anchor rod of a kind of tension and compression coupling type mainly is comprised of anchor bar body 1, pallet 2 and nut 3, and hole external application nut 3 tightens up rear as outer anchoring section c, bonds as interior anchoring section with anchor bar body 1 after filling with Anchor Agent 5 in the hole; Wherein anchor bar body 1 surface of interior anchoring section is two states, and that section in close aperture is light circle shape, is coarse shape near that section at the bottom of the hole; The light circle shape body of rod consists of interim interior anchoring section b, also is called " accurate free segment ", anchoring section a in coarse shape body of rod formation is permanent; And the body of rod two sections boundaries arranges force-bearing table 4.
The above-mentioned coarse shape body of rod refers to that preferably body of rod surface is threaded or the body of rod is twisted shape, it can with the Anchor Agent strong bonded, not easily separated.
Described force-bearing table 4 is members that are connected on the anchor bar body 1 and are provided with the slip casting passage.As shown in Figure 6, force-bearing table 4 is that the several sections that are welded on around the anchor bar body 1 are trapezoidal circular cone 6, and circular cone 6 equiblibrium mass distributions leave slip casting passage 12 between the adjacent a pair of circular cone; Force-bearing table 4 is that the section that is welded on the anchor bar body 1 is semiorbicular circular cone 7 as shown in Figure 7.Force-bearing table 4 is configured with various ways, is not limited only to above-mentioned two kinds.
Surrender for before preventing outer anchoring section c anchor bar body anchoring section b beginning to extend in interim, outer anchoring section c anchor bar body intensity should greater than temporarily interior anchoring section b lever strength, can be taked one of following measures:
1) body of rod of external anchoring section c is heat-treated when the processing anchor pole.
2) select the rod body material of two kinds of varying strengths to link together.
3) outer anchoring section c body of rod diameter is greater than body of rod diameter.
Surrender for before preventing outer anchoring section c anchoring section b beginning to extend in interim, can also locate in the aperture body of rod setting that light justifies shape such as Fig. 6, force-bearing table shown in Figure 7, stressed to reduce outer anchoring section c.
For the size of coordinated allocation to the power of force-bearing table and the interior anchoring section body of rod, prevent one of them too early destruction, near anchor hole one side elastic cushion block 11 is set at force-bearing table; Suitably adjust its thickness to reach the body of rod purpose that Coupling Deformation, stress equilibrium distribute before and after force-bearing table according to the modulus of elasticity of cushion block; Elastic cushion block links to each other with force-bearing table.
When described Anchor Agent adopted resin anchoring agent, a kind of preferred using method of the present utility model was:
1) at first beat anchor hole in treating the supporting rock mass, the anchor hole diameter should be greater than the external diameter of force-bearing table 4 described in the utility model;
2) put into successively rapid hardening resin anchoring cartridge and slow setting anchoring cartridge in anchor hole, make anchor pole insert the rapid solidification anchor agent that is of rear force-bearing table inboard, outside the force-bearing table is slow solidification anchor agent;
3) by roof bolting machine the anchor pole rotation is pressed into anchor hole, anchoring cartridge is squeezed and breaks and even mix, is full of anchor hole, and low speed solidifying Anchor Agent in hole solidifies comparatively fast, after it solidifies, anchor pole is applied certain prestressing force, and fastening nut is fixed outer anchoring section; Force-bearing table outside slow solidification anchor agent slowly solidifies afterwards, and anchor pole is played the second consolidation effect.
When described Anchor Agent adopted mortar, a kind of preferred using method of the present utility model was:
1) at first beat anchor hole in treating the supporting rock mass, the anchor hole diameter should be greater than the external diameter of force-bearing table described in the utility model;
2) anchor pole is inserted anchor hole, then mortar is injected anchor hole, after mortar solidifies, anchor pole is applied certain prestressing force, and the fixing outer anchoring section of fastening nut.
Claims (7)
1. high-strength large deformation anchor rod of tension and compression coupling type, it mainly is comprised of anchor bar body, pallet and nut, and hole external application nut tightens up rear as outer anchoring section, fills with in the hole behind the Anchor Agent with the anchor bar body bonding as interior anchoring section; It is characterized in that the anchor bar body surface of interior anchoring section is two states, that section in close aperture is light circle shape, is coarse shape near that section at the bottom of the hole; The light circle shape body of rod consists of interim interior anchoring section, also is called accurate free segment, anchoring section in coarse shape body of rod formation is permanent; In permanent anchoring section and temporarily in the body of rod of two sections boundaries of anchoring section be provided with force-bearing table.
2. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, the described coarse shape body of rod is to be threaded on body of rod surface or the body of rod is twisted shape.
3. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, described force-bearing table is that a plurality of sections that are welded on around the anchor bar body are trapezoidal circular cone, and the circular cone equiblibrium mass distribution leaves the slip casting passage between the adjacent a pair of circular cone.
4. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, described force-bearing table is that the section that is welded on the anchor bar body is semiorbicular circular cone.
5. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, the side near anchor hole on force-bearing table is provided with elastic cushion block.
6. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, the outer anchoring section body of rod diameter of anchor bar body is greater than accurate free segment body of rod diameter.
7. the high-strength large deformation anchor rod of tension and compression coupling type as claimed in claim 1 is characterized in that, is provided with in addition force-bearing table on the body of rod of place, aperture light circle shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220487119 CN202866841U (en) | 2012-09-12 | 2012-09-12 | Pull and press coupling type high, strong and big deformation anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220487119 CN202866841U (en) | 2012-09-12 | 2012-09-12 | Pull and press coupling type high, strong and big deformation anchor rod |
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| Publication Number | Publication Date |
|---|---|
| CN202866841U true CN202866841U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220487119 Expired - Fee Related CN202866841U (en) | 2012-09-12 | 2012-09-12 | Pull and press coupling type high, strong and big deformation anchor rod |
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| Country | Link |
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| CN (1) | CN202866841U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865088A (en) * | 2012-09-12 | 2013-01-09 | 山东科技大学 | Tension and compression coupling type high-strength and high-deformation anchor rod and method for using same |
| CN103233470A (en) * | 2013-04-18 | 2013-08-07 | 河海大学 | Recyclable anchor rod system for reinforcing joint surfaces of rocky slopes and mounting method of recyclable anchor rod system |
| CN103643978A (en) * | 2013-12-27 | 2014-03-19 | 中国矿业大学(北京) | Super-long anchor rod |
| CN107355257A (en) * | 2017-09-01 | 2017-11-17 | 中煤第建设有限公司 | The permanent traverse point of underground mine use and installation method |
-
2012
- 2012-09-12 CN CN 201220487119 patent/CN202866841U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865088A (en) * | 2012-09-12 | 2013-01-09 | 山东科技大学 | Tension and compression coupling type high-strength and high-deformation anchor rod and method for using same |
| CN102865088B (en) * | 2012-09-12 | 2015-04-08 | 山东科技大学 | Tension and compression coupling type high-strength and high-deformation anchor rod and method for using same |
| CN103233470A (en) * | 2013-04-18 | 2013-08-07 | 河海大学 | Recyclable anchor rod system for reinforcing joint surfaces of rocky slopes and mounting method of recyclable anchor rod system |
| CN103643978A (en) * | 2013-12-27 | 2014-03-19 | 中国矿业大学(北京) | Super-long anchor rod |
| CN107355257A (en) * | 2017-09-01 | 2017-11-17 | 中煤第建设有限公司 | The permanent traverse point of underground mine use and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20150912 |
|
| EXPY | Termination of patent right or utility model |