CN209652927U - A kind of Prestressed Rock soil anchor bolt - Google Patents
A kind of Prestressed Rock soil anchor bolt Download PDFInfo
- Publication number
- CN209652927U CN209652927U CN201920090490.7U CN201920090490U CN209652927U CN 209652927 U CN209652927 U CN 209652927U CN 201920090490 U CN201920090490 U CN 201920090490U CN 209652927 U CN209652927 U CN 209652927U
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- Prior art keywords
- anchor
- reinforcing steel
- free
- presstressed reinforcing
- anchoring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
A kind of Prestressed Rock soil anchor bolt, belong to Geotechnical Engineering field, the anchor pole includes anchor head and anchor rod body, anchor rod body includes the presstressed reinforcing steel being set in the drilling of foundation pit slope surface or side slope surface drilling, anchoring body and free body, presstressed reinforcing steel is continuous whole reinforcing bar, anchoring body and free body are set on presstressed reinforcing steel, the utility model proposes Prestressed Rock soil anchor bolt, it is to fill the free segment of rock soil anchor using foamed plastics, form flexible free segment, when anchor pole applies prestressing force, slide mass is compressed, due to the presence of flexible free segment, free segment and corresponding slide mass can be really achieved by anchor pole locking load compression, effective compressive pre-stress can be established in slide mass, sliding surface generates compression, to improve the shear resistance of sliding surface, so that the stabilization of foundation pit or side slope and safety can be guaranteed.
Description
Technical field
The utility model belongs to Geotechnical Engineering field, is related to foundation pit and slope project, is related specifically to a kind of pre-
Stress rock soil anchor.
Background technique
According to the basic principle and foundation pit of soil mechanics or the designing technique standard requirements of side slope, in the sliding of foundation pit or side slope
Anchor bar body should be made into free segment in body section, and anchor bar body should be made into anchoring section in the liptinite section of foundation pit or side slope, pass through
The frictional resistance that anchoring section anchor bar body provides prevents the production of sliding surface plus the effect constraint slide mass that is locked of anchor pole outer end
It is raw, to realize the purpose to match with calculation model for design, to ensure the stabilization of foundation pit or slope project, guarantee engineering peace
Entirely.
The mooring rod technique of existing foundation pit and slope project adds steel to twist using pea gravel concreten or mortar or cement paste
The scheme of line or steel tendon or high tensile reinforcement, the practice of free segment and anchoring section for anchor bar body, practical engineering application process
In, although having divided free segment and anchoring section in design drawing, there is no distinguish free segment different from the work of anchoring section mostly
Method, but anchor bar body one is poured into bottom, or even give the differentiation scheme of free segment and anchoring section, do not reach but
The effect of differentiation；Or propose technical solution is of poor quality, low efficiency, at high cost, it is difficult to promote and apply in practical projects.
Application No. is 201410030080.5 Chinese patent, a kind of multistage anchoring type resin anchor and its anchoring are disclosed
Method, it includes anchor bar body and aperture preloader, and an anchoring section is equipped at intervals on anchor pole, remaining section is free segment；The point
Anchoring section is that dentation cutting ring is machined on the anchor bar body of this section, and dentation cutting ring housing has a two-component resin anchoring cartridge, double groups
Part resin anchoring cartridge both ends are cased with spacer ring, so that anchor bar body to be successively divided into the first free segment, the since aperture
Some anchoring sections, the second free segment, second point anchoring section, third free segment, thirdly anchoring section, it is desirable that the first free segment is in
The relaxation zone of country rock, thirdly anchoring section is in the elastic region of country rock, remaining section is in the plastic zone of country rock.The technical solution point
The quantity and each section of length of anchoring section and free segment can be adjusted according to pressure from surrounding rock characteristic distributions, dispersed load, avoided
Superpower stress occurs in anchor pole end to concentrate, the body of rod is prevented to be broken or extract anchoring body.The technical solution there are the problem of
Be: complicated for operation, work efficiency is low, quality assurance difficulty is big, at high cost etc., especially quality problems, due to resin mobility and
Permeability is extremely strong, the local sealing to consolidate and being limited in the region of one section of anticipation with the ground on periphery, in rock mass
Has no possibility, resin is inevitable to be overflowed from anchoring section, causes to fail.
Application No. is 201520526632.1 Chinese patents, disclose a kind of water power side slope free section of anchor cable grouting knot
Structure, including side slope surface and the anchor cable being set in side slope surface drilling, the anchor cable drilling is divided into anchoring section and free segment,
Middle free segment is between anchoring section and side slope surface, including being socketed the anchor cable body being set in the anchor cable drilling, the anchor
Grouting Pipe is provided in cable body, the outer rim that anchor cable body is located at the part of free segment is socketed with sealing wrap.The technical solution uses
Geotextiles are that anchor bar body makees housing, it is intended to anchor bar body and rock mass be isolated, to achieve the purpose that reduce side friction, due to drilling
The roughening and cement slurry of side wall can permeate the characteristic of geotextiles, and practical frictional resistance can be bigger, and free segment function is caused to lose
Effect.
Application No. is 201410032446.2 Chinese patent, a kind of multistage anchoring type grouting rock bolt and its anchoring are disclosed
Method, it includes anchor bar body and aperture preloader, and anchor pole is also equipped at intervals with free segment, and the free segment is on the anchor bar body
It is cased with one section of plastic bushing, the both ends contractibility washer of plastic bushing is blocked or tightened, and the anchor bar body for being cased with plastic bushing is
Free segment, the anchor bar body of remaining section are a point anchoring section, so that anchor bar body to be successively divided into the first free segment, the since aperture
Some anchoring sections, the second free segment, second point anchoring section, third free segment, thirdly anchoring section, it is desirable that the first free segment is in
The relaxation zone of country rock, thirdly anchoring section is in the elastic region of country rock, remaining section is in the plastic zone of country rock.Technical solution examination
Figure makes anchor bar body become free segment in its section by plastic bushing, still, due to the frictional resistance between anchor bar body and rock mass
Or cohesive force still has, by the transmitting of anchor bar body Compressive Bearing Capacity, the frictional resistance or cohesive force of this section anchor bar body are still
Reinforcing bar, steel tendon or steel strand wires can be passed to by the anchor bar body of adjacent anchoring section, the free segment can not play free segment
Effect.
Application No. is 201510434626.8 Chinese patents, disclose a kind of anchor cable subregion anchoring segmentation preload rock stratum control
Method processed, this method implements subregion anchoring using anchor cable, segmentation pre-tightens.Subregion anchoring is directed to fracture area, plastic zone and elasticity
Anchoring section is set separately in area, and anchoring sequence is followed successively by elastic region, plastic zone and fracture area, and elastic region anchoring section uses resin anchoring
Agent anchoring, plastic zone and fracture area are anchored using slip casting；Segmentation pre-tightens after i.e. each anchoring is stablized except the anchoring section of aperture, right
The free segment in anchoring section outer end to aperture carries out tensioning preload.The technical solution can effectively improve the reliability of cable bolting,
Subregion setting anchoring section can effectively avoid whole failure of cable caused by anchor cable is locally broken, and slip casting anchoring has anchoring anchor
Rope and the double action for reinforcing crack country rock；Segmentation, which pre-tightens, has anchor cable overall length compared with high pre-stress, and active support effect is obvious
It improves, CONTROL OF STRATA MOVEMENT effect can be effectively improved.The technical solution is suitable for permanent anchor pole, for facing for base pit engineering
When property anchor pole, this way is complicated for operation, work efficiency is low, long construction period, at high cost.
Realize the Free Transform effect of provisional free section, free segment is allowed for by Free Compression.Existing skill
Art is unable to satisfy such requirement, therefore needs the new technical solution of one kind to solve these problems.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of Prestressed Rock soil anchor bolts, so that foundation pit or side slope
Anchor pole in slide mass section become can by anchor pole lock load compress free segment, anchor pole locking load have in sliding surface
Effect generates compression, improves the shear resistance of sliding surface, it is ensured that the stabilization of foundation pit or slope project guarantees engineering safety.
Specifically the utility model adopts the following technical solutions: a kind of Prestressed Rock soil anchor bolt, it is characterised in that: the anchor pole
Including anchor head and anchor rod body, the anchor rod body includes the prestressing force being set in the drilling of foundation pit slope surface or side slope surface drilling
Muscle, anchoring body and free body, the presstressed reinforcing steel are continuous whole reinforcing bar, are divided into two parts, respectively anchoring section prestressing force
Muscle and free segment presstressed reinforcing steel, free segment presstressed reinforcing steel drills close to foundation pit slope surface or the aperture side of side slope surface drilling, freely
Anti-corrosion separation layer is enclosed with outside section presstressed reinforcing steel；The anchoring body is arranged outside anchoring section presstressed reinforcing steel, anchoring body and anchor
Gu the anchoring section of section presstressed reinforcing steel composition anchor pole；The free body is arranged outside free segment presstressed reinforcing steel, free body and freedom
Section presstressed reinforcing steel constitutes the free segment of anchor pole.
Through the above design, the utility model can be brought the following benefits: one kind provided by the utility model
Prestressed Rock soil anchor bolt is to be filled the free segment of rock soil anchor using foamed plastics, forms flexible free segment, when anchor pole applies
When prestressing force, slide mass is compressed, and due to the presence of flexible free segment, free segment and corresponding slide mass can be really achieved
By anchor pole locking load compression, effective compressive pre-stress can be established in slide mass, sliding surface generates compression, to improve
The shear resistance of sliding surface, so that the stabilization of foundation pit or side slope and safety can be guaranteed.
Detailed description of the invention
Fig. 1 is the Prestressed Rock soil anchor bolt schematic diagram referred in the utility model embodiment.
Fig. 2 is the free segment diagrammatic cross-section of the Prestressed Rock soil anchor bolt referred in the utility model embodiment.
Fig. 3 is the anchoring section diagrammatic cross-section of the Prestressed Rock soil anchor bolt referred in the utility model embodiment.
It is respectively marked in figure as follows: 1- anchoring section, 2- free segment, 3- Rock And Soil, 4- anchoring body, 5- free body, 6- prestressing force
Muscle, 7- conduit.
Specific embodiment
Below with reference to the attached drawing of the utility model, the technical scheme in the embodiment of the utility model is carried out clear, complete
Statement, the embodiment is only the utility model a part of the embodiment, instead of all the embodiments.It is practical new based on this
Embodiment in type, those of ordinary skill in the art without making creative work, every other reality obtained
Example is applied, the protection scope of the utility model is belonged to.
Refering to fig. 1~Fig. 3 proposes a kind of Prestressed Rock soil anchor bolt in the present embodiment, which includes anchor head and anchor pole
The body of rod, the anchor rod body include being set to the drilling of foundation pit slope surface or presstressed reinforcing steel 6,4 and of anchoring body in side slope surface drilling
Free body 5, the presstressed reinforcing steel 6 are continuous whole reinforcing bar, are divided into two parts, respectively anchoring section presstressed reinforcing steel and free segment
Presstressed reinforcing steel, free segment presstressed reinforcing steel drills close to foundation pit slope surface or the aperture side of side slope surface drilling, free segment presstressed reinforcing steel
Outside is enclosed with anti-corrosion separation layer；The anchoring body 4 is arranged outside anchoring section presstressed reinforcing steel, and anchoring body 4 and anchoring section are answered in advance
The anchoring section 1 of power muscle composition anchor pole；The free body 5 is arranged outside free segment presstressed reinforcing steel, and free body 5 and free segment are answered in advance
The free segment 2 of power muscle composition anchor pole；
The material of the anchoring body 4 uses cement base cementitious mixes；
The material of the free body 5 uses the foamed plastics of the factorial production.
The free segment preparation method of specific Prestressed Rock soil anchor bolt, which is characterized in that this approach includes the following steps,
Step 1: preparing free body 5
More than two free bodies 5 are prepared using polystyrene foam plastics or polyurethane foam plastics；Free body 5 is cylinder
Shape, diameter are less than bore diameter 3mm~50mm for accommodating anchor rod body, segmentation or whole section of preparation；Each free body 5 it is total
Length is 2 length of free segment of anchor pole used in free body 5；Elongated perforation circular hole is arranged in the center of free body 5, the circular hole
Diameter is greater than outer diameter 2mm~20mm of 6 outside anti-corrosion separation layer of presstressed reinforcing steel；Apart from 5 outer wall clear distance 5mm~20mm of free body
Position the circular pipe hole of one elongated perforation is set again, the diameter of conduit hole is greater than 7 outer diameter 2mm~20mm of conduit；
Step 2: Rock And Soil 3 drills
It drills in the slope surface of 3 foundation pit of Rock And Soil or side slope by the diameter of design requirement, length and the gradient；Hole depth is just
It is the length of anchor rod body, i.e. the sum of the anchoring section 1 of anchor pole and the length of free segment 2；
Step 3: material prepares
Presstressed reinforcing steel 6 is prepared by the material of design requirement, quantity, specification and length, and inner end anchor is set by design requirement
Head；Anti-corrosion separation layer is arranged in external in free segment presstressed reinforcing steel；In the range of 6 free segment of presstressed reinforcing steel, corresponding free body 5
Center hole, free body 5 prepared by step 1 is set on the outside of presstressed reinforcing steel 6；
Conduit 7 is run through to the conduit hole for being inserted through free body 5, keeps 7 inner end of conduit concordant with the inner end of presstressed reinforcing steel 6；
Step 4: joint bar is in the milk
The material that step 3 is prepared is sent into the hole of step 2 drilling, is prepared grouting material and is passed through conduit 7 to step
It is in the milk in the hole of two drillings, when free body 5 is displaced outwardly or the gap between free body 5 and hole sidewalls has grouting material exudation
Terminate grouting.
So far, the preparation method of Prestressed Rock soil anchor bolt free segment is completed.
Claims (1)
1. a kind of Prestressed Rock soil anchor bolt, which includes anchor head and anchor rod body, it is characterised in that: the anchor rod body includes
Presstressed reinforcing steel (6), anchoring body (4) and the free body (5) being set in the drilling of foundation pit slope surface or side slope surface drilling, it is described pre- to answer
Power muscle (6) is continuous whole reinforcing bar, is divided into two parts, respectively anchoring section presstressed reinforcing steel and free segment presstressed reinforcing steel, freely
Section presstressed reinforcing steel drills close to foundation pit slope surface or the aperture side of side slope surface drilling, is enclosed with anti-corrosion outside free segment presstressed reinforcing steel
Separation layer；The anchoring body (4) is arranged outside anchoring section presstressed reinforcing steel, and anchoring body (4) and anchoring section presstressed reinforcing steel constitute anchor
The anchoring section (1) of bar；The free body (5) is arranged outside free segment presstressed reinforcing steel, free body (5) and free segment presstressed reinforcing steel
Constitute the free segment (2) of anchor pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920090490.7U CN209652927U (en) | 2019-01-21 | 2019-01-21 | A kind of Prestressed Rock soil anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920090490.7U CN209652927U (en) | 2019-01-21 | 2019-01-21 | A kind of Prestressed Rock soil anchor bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209652927U true CN209652927U (en) | 2019-11-19 |
Family
ID=68521660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920090490.7U Withdrawn - After Issue CN209652927U (en) | 2019-01-21 | 2019-01-21 | A kind of Prestressed Rock soil anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209652927U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706927A (en) * | 2019-01-21 | 2019-05-03 | 吉林建筑大学 | A kind of preparation method of Prestressed Rock soil anchor bolt and its free segment |
| CN111927514A (en) * | 2020-08-03 | 2020-11-13 | 中国矿业大学 | Prestress full-length anchoring system and method based on steel grit adding in post-grouting method |
-
2019
- 2019-01-21 CN CN201920090490.7U patent/CN209652927U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706927A (en) * | 2019-01-21 | 2019-05-03 | 吉林建筑大学 | A kind of preparation method of Prestressed Rock soil anchor bolt and its free segment |
| CN111927514A (en) * | 2020-08-03 | 2020-11-13 | 中国矿业大学 | Prestress full-length anchoring system and method based on steel grit adding in post-grouting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191119 Effective date of abandoning: 20230223 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191119 Effective date of abandoning: 20230223 |