CN204023567U - A kind of tension and compression composite anchor-rod - Google Patents
A kind of tension and compression composite anchor-rod Download PDFInfo
- Publication number
- CN204023567U CN204023567U CN201420450678.5U CN201420450678U CN204023567U CN 204023567 U CN204023567 U CN 204023567U CN 201420450678 U CN201420450678 U CN 201420450678U CN 204023567 U CN204023567 U CN 204023567U
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- China
- Prior art keywords
- anchor
- rod body
- bearing plate
- tension
- steel bearing
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- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 230000006835 compression Effects 0.000 title claims abstract description 19
- 238000007906 compression Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000004873 anchoring Methods 0.000 claims abstract description 44
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 abstract description 20
- 239000004576 sand Substances 0.000 abstract description 17
- 239000004568 cement Substances 0.000 abstract description 16
- 239000002002 slurry Substances 0.000 abstract description 7
- 239000011083 cement mortar Substances 0.000 abstract 1
- 229920002472 Starch Polymers 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000008107 starch Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 206010049244 Ankyloglossia congenital Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a kind of tension and compression composite anchor-rod, has an anchor rod body, and the shaft of this anchor rod body is installed with a steel bearing plate by extruded sleeve; Anchor rod body is set with sleeve pipe between its anchor head corresponding and steel bearing plate; Anchor rod body part is configured with free section, anchor pole pressure-bearing anchoring section and anchor pole tension anchoring section.This new structure is simple, the concentrated force that can be subject to by anchor pole at extruded sleeve and steel bearing plate place converts a less pressure and a pulling force to, the active force that unit anchoring section is subject to significantly reduces, significantly can reduce the peak shear stress on cement mortar and soil body interface, and shear stress is uniformly distributed, give full play to cement (sand) slurry and the side friction on soil body interface, thus anchor pole unit length uplift resistance can be significantly improved, reduce rock-bolt length, save cost, improve the security reliability of anchor pole.Basis is novel is widely used in the engineering fields such as foundation ditch, side slope, tunnels and underground engineering anchoring and reinforcing.
Description
Technical field
The utility model relates to a kind of tension and compression composite anchor-rod, for anchoring and the reinforcing of foundation ditch, side slope, tunnel and the underground construction in various low side friction stratum.
Background technology
In the anchoring and safeguarding technology of foundation ditch, side slope, tunnel and underground construction, adopt anchor pole extremely extensive, wherein the kind of anchor rod body is a lot, and differ from one another, corresponding construction method is substantially identical.Existing anchor pole is after holing in the earth formation, is loaded in boring by anchor rod body, then to be poured in boring by Grouting Pipe by cement (sand) slurry and to carry out anchoring.Existing mooring rod technique is for the soil layer such as cohesive soil, the silt of high void ratio, slightly close Extra-fine sand of loose ground, high liquidity index, and the side friction of anchoring body and the soil body is less, and the anti-pulling capacity of anchor pole is relatively low; And existing anchor pole can produce obvious stress concentration phenomenon in anchoring section end, the shear stress between cement (sand) slurry and soil layer is easily made to exceed side friction and occur progressive failure.Therefore, in above-mentioned low side friction stratum, adopt existing anchor structure form seriously can reduce the uplift resistance of anchor pole, the security reliability of engineering is suffered damage.
Utility model content
It is simple that the purpose of this utility model is to provide a kind of structure, significantly can reduce the shear stress on anchoring body and soil body interface, thus can significantly improve the tension and compression composite anchor-rod of anti-pulling of anchor bar and significantly enhancing anchor pole safety.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of tension and compression composite anchor-rod, has an anchor rod body, the shaft of this anchor rod body is installed with a steel bearing plate by extruded sleeve, and the centre of this steel bearing plate is provided with the through hole run through for described anchor rod body in the axial direction; Described anchor rod body is set with sleeve pipe between its anchor head corresponding and described steel bearing plate, and the rearward end of this sleeve pipe extends on described steel bearing plate; Anchor rod body between described steel bearing plate and body of rod bottom does not overlap and has the corresponding part of described sleeve pipe to form anchor pole tension anchoring section, anchor rod body between described steel bearing plate with anchor head overlaps the free section and anchor pole pressure-bearing anchoring section that have the corresponding part of described sleeve pipe to form to accept mutually, this anchor pole pressure-bearing anchoring section and the described anchor rod body of the adjacent formation of described anchor pole tension anchoring section anchor rod anchored section.
Described steel bearing plate be located at described anchor rod anchored section with in the middle of it in 1/2nd length areas of symmetry.
Described steel bearing plate is also fixed on described anchor rod body by position limiting clamp is auxiliary.
The diameter of described steel bearing plate is 4-7 centimetre less of the diameter of anchor pole correspondence boring.
Described anchor rod body is made up of jointly some reinforcing bars or steel strand.
On described anchor rod body, uniform intervals is laid with the support member for making described anchor rod body centering.
After adopting such scheme, the utility model is relative to the beneficial effect of prior art: this novel tension and compression composite anchor-rod is on anchor rod body, fixedly mount steel bearing plate, anchor rod body between steel bearing plate and anchor head overlaps tubing to isolate so that this part body of rod and cement (sand) are starched, form the free section and anchor pole pressure-bearing anchoring section accepted mutually; Anchor rod body between steel bearing plate and body of rod bottom not overlapping tubing makes the body of rod and cement (sand) starch well-bonded, forms one section of anchor pole tension anchoring section; Anchor pole pressure-bearing anchoring section and anchor pole tension anchoring section form two unit anchoring sections of anchor pole.
After rockbolt stress, isolate because the body of rod and cement (sand) are starched by sleeve pipe, the power that anchor pole is subject to is directly delivered to the extruded sleeve place on rear side of steel bearing plate, and the concentrated force that anchor pole is subject to is converted to a less pressure and a pulling force herein, and be applied on two unit anchoring sections respectively, namely pressure extrudes steel bearing plate by extruded sleeve and then acts on anchor pole pressure-bearing anchoring section, pulling force is starched well-bonded and is acted directly on anchor pole tension anchoring section due to anchor rod body and cement (sand), the active force making individual unit anchoring section be subject to thus reduces greatly, thus make the cement (sand) on anchor pole pressure-bearing anchoring section and anchor pole tension anchoring section starch remarkable reduction corresponding to the peak shear stress between soil body interface, shearing stress distribution between interface is more even, and the side friction between cement (sand) slurry and soil body interface is not fully exerted, significantly improve the uplift resistance of anchor pole unit length, reduce rock-bolt length, save cost, strengthen the security reliability of anchor pole.This novel tension and compression composite anchor-rod structure is simple, successfully solve conventional anchor pole in the soil layer that side friction is low, to there is stress concentrate a difficult problem low with anti-pulling capacity, wide application, is specially adapted to the foundation ditch in low side friction stratum, side slope, the anchoring of tunnels and underground engineering and stabilization works.
Accompanying drawing explanation
Schematic diagram when Fig. 1 is this novel tension and compression composite anchor-rod insertion Rock And Soil;
Fig. 2 is the schematic diagram be in the lock state after this novel tension and compression composite anchor-rod inserts Rock And Soil;
Fig. 3 is the A-A generalized section in Fig. 2;
Fig. 4 is the B-B generalized section in Fig. 2;
Fig. 5 is the C-C generalized section in Fig. 2.
Label and symbol description
1-anchor rod body; 2-steel bearing plate; 3-extruded sleeve; 4-position limiting clamp; 5-sleeve pipe; 6-Grouting Pipe; 7-through hole; 8-holes; 9-frenulum; 10-slope protection pile (sprayed mortar surface layer); 11-ground tackle; 12-triangle steel timbering; 13-waist rail; 14-cement (sand) is starched; 15-Pressure-bearing pads;
L
frepresent free section length; L
arepresent anchor rod anchored segment length; L
acrepresent anchor pole pressure-bearing anchoring depth; L
atrepresent anchor pole tension anchoring depth.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this case is described in further detail.
See Fig. 1-Fig. 5, a kind of tension and compression composite anchor-rod of the utility model, the steel bearing plate 2, extruded sleeve 3 and the sleeve pipe 5 that mainly comprise anchor rod body 1 in shown embodiment and be arranged on this anchor rod body 1.
Specifically, steel bearing plate 2 in cylindric, in the middle of it in the axial direction on offer through hole 7, anchor rod body 1 penetrates from through hole 7, and by extruded sleeve 3, steel bearing plate 2 being fixed on anchor rod body 1, extruded sleeve 3 is specifically fixed on the rearward position of steel bearing plate 2.Preferably, the front side of steel bearing plate 2 is also auxiliary fixing by position limiting clamp 4.Anchor rod body 1 can be made up of jointly some reinforcing bars or steel strand.Provide anchor rod body 1 in embodiment to arrange in pairs, thus steel bearing plate 2 offers two through holes 7 (see Fig. 4) of intermediate symmetry.Sleeve pipe 5 to be set on anchor rod body 1 and to be positioned between anchor rod body 1 anchor head and steel bearing plate 2, and the rearward end of sleeve pipe 5 extends on steel bearing plate 2.Sleeve pipe 5 preferably by position limiting clamp colligation on anchor rod body 1.
Described anchor rod body 1 coordinates steel bearing plate 2, extruded sleeve 3 and sleeve pipe 5 structure design, and as shown in Figure 1, not overlapping wherein on anchor rod body 1 between corresponding steel bearing plate 2 and body of rod bottom has the part of sleeve pipe 5 to form anchor pole tension anchoring section (L
atsection).Free section (the L that on anchor rod body 1, corresponding steel bearing plate 2 and the cover between anchor head have the part of sleeve pipe 5 to form to accept mutually
fsection) and anchor pole pressure-bearing anchoring section (L
acsection).Anchor pole pressure-bearing anchoring section (L
acsection) and anchor pole tension anchoring section (L
atsection) anchor rod anchored section of (L of adjacent formation anchor rod body 1
a).Described free section (L
fsection) and anchor pole pressure-bearing anchoring section (L
acsection) separately proportion change to some extent (it can calculate according to this area related algorithm) depending on soil layer condition.Anchor rod anchored section of (L be preferably located at by described steel bearing plate 1
a) with in the middle of it in 1/2nd length areas of symmetry, particular location is depending on soil layer condition.
During the application of this new type compound anchor pole, first tighten being bundled by frenulum 9 bottom Grouting Pipe 6 end and anchor rod body 1, insert in Rock And Soil boring 8 with anchor rod body 1, after cement injection (sand) starches 14 in boring 8, extract Grouting Pipe 6 by Grouting Pipe 6; Starch after 14 intensity reach designing requirement until cement (sand), at anchor head place, triangle steel timbering 12 is installed, waist rail 13, Pressure-bearing pads 15 and ground tackle 11, this novel tension and compression composite anchor-rod is carried out stretch-draw and locked.Preferably, on anchor rod body 1, also support member (not shown) can be laid with, centering when laying in boring 8 for making anchor rod body 1 by uniform intervals (interval 1-2 rice).The diameter of steel bearing plate 1 with control than the little 4-7 of diameter centimetre of anchor pole correspondence boring 8 for good so that anchor rod body 1 and Grouting Pipe 6 can together with put into boring 8 smoothly.
Due to the utilization of technique scheme, originally novel compared with prior art have following advantages:
Anchoring section is separated into pressure-bearing anchoring section and tension anchoring section by the steel bearing plate 2 in described tension and compression composite anchor-rod, after rockbolt stress, by extruded sleeve 3 and steel bearing plate 2 concentrated force be subject to converted to two less, the pulling force acting on the pressure on pressure-bearing anchoring section respectively and act on tension anchoring section, the concentrated force that individual unit anchoring section is subject to significantly reduces, thus the peak shear stress significantly reduced between cement (sand) slurry and soil body interface, and make the shearing stress distribution between cement (sand) slurry and soil body interface more even, thus the side friction between cement (sand) slurry and soil body interface is not fully exerted, significantly improve the uplift resistance of anchor pole, reduce rock-bolt length, save cost, strengthen the safety of anchor pole.
Here remark additionally existing tension type anchor pole and pressure type anchor rod Problems existing, the unique distinction further illustrating this new design with this and the advantage brought.Existing tension type anchor pole and pressure type anchor rod all only have one section of anchoring section, after rockbolt stress, Rock And Soil and cement (sand) starch that the shear stress at interface is all direct is passed to the other end from one end, interface, top is made to there is obvious stress concentration phenomenon, shear stress is excessive, easily cause the shear stress because of concentrations exceed the ultimate bond stress at interface and occur that shear stress on interface softens, and then cause progressive destruction.And decay is very fast during shear stress on interface transmission, uneven to distributed pole in bolt shaft, cause Rock And Soil to be not in full use with grouting body interface collateral resistance, anchor pole anti-pulling capacity is lower.
Below be only embody rule example of the present utility model, protection domain of the present utility model is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, or any mounting means to the bearing plate of steel described in the utility model or installation form, all drop within the utility model rights protection scope.
Claims (6)
1. a tension and compression composite anchor-rod, has an anchor rod body, it is characterized in that: the shaft of this anchor rod body is installed with a steel bearing plate by extruded sleeve, and the centre of this steel bearing plate is provided with the through hole run through for described anchor rod body in the axial direction; Described anchor rod body is set with sleeve pipe between its anchor head corresponding and described steel bearing plate, and the rearward end of this sleeve pipe extends on described steel bearing plate; Anchor rod body between described steel bearing plate and body of rod bottom does not overlap and has the corresponding part of described sleeve pipe to form anchor pole tension anchoring section, anchor rod body between described steel bearing plate with anchor head overlaps the free section and anchor pole pressure-bearing anchoring section that have the corresponding part of described sleeve pipe to form to accept mutually, this anchor pole pressure-bearing anchoring section and the described anchor rod body of the adjacent formation of described anchor pole tension anchoring section anchor rod anchored section.
2. a kind of tension and compression composite anchor-rod as claimed in claim 1, is characterized in that: described steel bearing plate be located at described anchor rod anchored section with in the middle of it in 1/2nd length areas of symmetry.
3. a kind of tension and compression composite anchor-rod as claimed in claim 1, is characterized in that: described steel bearing plate is also fixed on described anchor rod body by position limiting clamp is auxiliary.
4. a kind of tension and compression composite anchor-rod as claimed in claim 1, is characterized in that: the diameter of described steel bearing plate is 4-7 centimetre less of the diameter of anchor pole correspondence boring.
5. a kind of tension and compression composite anchor-rod as claimed in claim 1, is characterized in that: described anchor rod body is made up of jointly some reinforcing bars or steel strand.
6. a kind of tension and compression composite anchor-rod as claimed in claim 1, is characterized in that: on described anchor rod body, uniform intervals is laid with the support member for making described anchor rod body centering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420450678.5U CN204023567U (en) | 2014-08-11 | 2014-08-11 | A kind of tension and compression composite anchor-rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420450678.5U CN204023567U (en) | 2014-08-11 | 2014-08-11 | A kind of tension and compression composite anchor-rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204023567U true CN204023567U (en) | 2014-12-17 |
Family
ID=52063454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420450678.5U Active CN204023567U (en) | 2014-08-11 | 2014-08-11 | A kind of tension and compression composite anchor-rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204023567U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104164875A (en) * | 2014-08-11 | 2014-11-26 | 华侨大学 | Tension and compression combination-type anchor rod |
| CN104863150A (en) * | 2015-06-11 | 2015-08-26 | 湖南大学 | Anchor end device of tension-compression pre-stressed anchor cable |
| CN108894219A (en) * | 2018-06-26 | 2018-11-27 | 北京健安诚岩土工程有限公司 | A kind of tension type detachable anchor |
-
2014
- 2014-08-11 CN CN201420450678.5U patent/CN204023567U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104164875A (en) * | 2014-08-11 | 2014-11-26 | 华侨大学 | Tension and compression combination-type anchor rod |
| CN104863150A (en) * | 2015-06-11 | 2015-08-26 | 湖南大学 | Anchor end device of tension-compression pre-stressed anchor cable |
| CN108894219A (en) * | 2018-06-26 | 2018-11-27 | 北京健安诚岩土工程有限公司 | A kind of tension type detachable anchor |
| CN108894219B (en) * | 2018-06-26 | 2021-02-02 | 北京健安诚岩土工程有限公司 | Anchor rod can be dismantled to pulling force type |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |