CN209669868U - Cement base Prestressed Rock soil anchor bolt - Google Patents
Cement base Prestressed Rock soil anchor bolt Download PDFInfo
- Publication number
- CN209669868U CN209669868U CN201920097019.0U CN201920097019U CN209669868U CN 209669868 U CN209669868 U CN 209669868U CN 201920097019 U CN201920097019 U CN 201920097019U CN 209669868 U CN209669868 U CN 209669868U
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- China
- Prior art keywords
- free segment
- reinforcing steel
- presstressed reinforcing
- section
- anchor
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Abstract
The utility model proposes cement base Prestressed Rock soil anchor bolt, belong to Geotechnical Engineering field, the anchor pole includes outer anchor head and anchor rod body, anchor rod body is divided into anchoring section and free segment, free segment is divided into flexible free segment and rigid free segment, flexible free segment is close to anchoring section setting, flexible free segment be flexible foamed material is injected foundation pit or side slope free section be close to anchoring section position form one section being capable of compressed section, 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 water
The partition method of mud base Prestressed Rock soil anchor bolt and anchor rod anchored section and free segment.
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 subregion 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, do not provide the square partition of free segment and anchoring section mostly
Case, but anchor bar body one is poured into bottom, or even give the partition scheme of free segment and anchoring section, do not reach but
The effect of subregion；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 the Chinese patent of CN201410032446.2, a kind of multistage anchoring type grouting rock bolt and its anchor are disclosed
Solid 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 in the anchor bar body
On be cased with one section of plastic bushing, the both ends contractibility washer of plastic bushing is blocked or is tightened, and is cased with the anchor bar body of plastic bushing
For free segment, the anchor bar body of remaining section is a point anchoring section, thus anchor bar body is successively divided into since aperture the first free segment,
First anchoring section, the second free segment, second point anchoring section, third free segment, thirdly anchoring section, it is desirable that at the first free segment
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
Attempt that anchor bar body is made to become free segment in its section by plastic bushing, still, due to the frictional resistance between anchor bar body and rock mass
Power or cohesive force still have, and by the transmitting of anchor bar body Compressive Bearing Capacity, the frictional resistance or cohesive force of this section anchor bar body are still
So 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 freedom
The effect of section.
Application No. is the Chinese patents of CN201510434626.8, disclose a kind of anchor cable subregion anchoring segmentation preload rock stratum
Control method, this method implements subregion anchoring using anchor cable, segmentation pre-tightens.Subregion anchoring is directed to fracture area, plastic zone and bullet
Property area be set separately anchoring section, anchoring sequence is followed successively by elastic region, plastic zone and fracture area, and elastic region anchoring section uses resin anchor
Gu agent anchors, 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,
Tensioning preload is carried out to the free segment of anchoring section outer end to aperture.The technical solution can effectively improve the reliable of cable bolting
Property, subregion setting anchoring section can effectively avoid whole failure of cable caused by anchor cable is locally broken, and slip casting anchoring has anchor
Gu anchor cable and the double action for reinforcing crack country rock；Segmentation, which pre-tightens, has anchor cable overall length compared with high pre-stress, active support effect
It significantly improves, CONTROL OF STRATA MOVEMENT effect can be effectively improved.The technical solution is suitable for permanent anchor pole, for being used for base pit engineering
Provisional anchor pole, this way is complicated for operation, work efficiency is low, long construction period, at high cost.
Realize provisional free section Free Transform effect, free segment must can by Free Compression, and
The frictional resistance or cohesive force of free segment are not transferred to the tensile materials of anchor pole.The prior art is unable to satisfy such requirement, because
This 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 cement base Prestressed Rock soil anchor bolts, so that foundation pit
Or the anchor pole of side slope becomes the free segment that load compression can be locked by anchor pole in slide mass section, anchor pole locks load in cunning
Dynamic face effectively generates compression, improves the shear resistance of sliding surface, it is ensured that the stabilization of foundation pit or slope project guarantees engineering peace
Entirely.
It is specific the utility model adopts the following technical solutions:
The utility model proposes a kind of cement base Prestressed Rock soil anchor bolt, which includes outer anchor head and anchor rod body,
The anchor rod body includes being set to the drilling of foundation pit slope surface or the presstressed reinforcing steel in side slope surface drilling, anchoring body, rigidly freedom
Body and flexible free body, the presstressed reinforcing steel are continuous whole reinforcing bar, are divided into two parts, respectively anchoring section presstressed reinforcing steel,
Free segment presstressed reinforcing steel, anchoring section presstressed reinforcing steel is located at the drilling of foundation pit slope surface or side slope surface drilling is inboard, free segment prestressing force
Muscle is divided into rigid free segment presstressed reinforcing steel and flexible free segment presstressed reinforcing steel, and anti-corrosion isolation is enclosed with outside free segment presstressed reinforcing steel
Layer and oversheath；The anchoring body is arranged outside anchoring section presstressed reinforcing steel, and anchoring body and anchoring section presstressed reinforcing steel constitute anchor pole
The anchoring section of the body of rod；The rigidity free body is arranged outside rigid free segment presstressed reinforcing steel, and rigid free body and rigidity are freely
Section presstressed reinforcing steel constitutes the rigid free segment of anchor rod body；The flexibility free body is arranged outside flexible free segment presstressed reinforcing steel
Portion, flexible free body and flexible free segment presstressed reinforcing steel constitute the flexible free segment of anchor rod body, and flexible free segment is arranged in anchor
Between the anchoring section of club shaft and rigid free segment.
Anti-corrosion separation layer and oversheath are enclosed with outside the free segment presstressed reinforcing steel.
The cement base Prestressed Rock soil anchor bolt, it is characterised in that: the anchor rod body further includes conduit, the conduit
Be set in parallel with presstressed reinforcing steel, one end end of conduit is located at the intersection of anchoring section and flexible free segment, conduit it is another
Distal process is for anchoring section.
Through the above design, the utility model can be brought the following benefits: the utility model proposes cement
The partition method of base Prestressed Rock soil anchor bolt and anchor rod anchored section and free segment is that flexible foamed material is injected foundation pit or side slope
Free section is close to the position of anchoring section, formed one section can compressed section, i.e., flexible free segment, when anchor pole apply it is pre-
When stress, 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 locks load compression, effective compressive pre-stress can be established in slide mass, sliding surface generates compression, to improve cunning
The shear resistance in dynamic face, so that the stabilization of foundation pit or side slope and safety can be guaranteed.
Detailed description of the invention
Fig. 1 is the cement base Prestressed Rock soil anchor bolt schematic diagram referred in the utility model embodiment.
Respectively mark in figure as follows: 1- anchoring section, 2- rigidity free segment, 3- flexibility free segment, 4- anchoring body, 5- rigidity are freely
Body, 6- flexibility free body, 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, cement base Prestressed Rock soil anchor bolt in the present embodiment, the anchor pole include outer anchor head and anchor rod body, institute
Stating anchor rod body includes being set to the drilling of foundation pit slope surface or presstressed reinforcing steel, anchoring body 4, rigid free body in side slope surface drilling
5 and flexible free body 6, the presstressed reinforcing steel be continuous whole reinforcing bar, respectively anchoring section presstressed reinforcing steel, free segment prestressing force
Muscle, anchoring section presstressed reinforcing steel is located at the drilling of foundation pit slope surface or side slope surface drilling is inboard, and free segment presstressed reinforcing steel is divided into rigidity certainly
By section presstressed reinforcing steel and flexible free segment presstressed reinforcing steel, anti-corrosion separation layer and oversheath are enclosed with outside free segment presstressed reinforcing steel；
The anchoring body 4 is arranged outside anchoring section presstressed reinforcing steel, the anchoring of anchoring body 4 and anchoring section presstressed reinforcing steel composition anchor rod body
Section 1；The rigidity free body 5 is arranged outside rigid free segment presstressed reinforcing steel, rigid free body 5 and rigid free segment prestressing force
The rigid free segment 2 of muscle composition anchor rod body；The flexibility free body 6 is arranged outside flexible free segment presstressed reinforcing steel, flexible
Free body 6 and flexible free segment presstressed reinforcing steel constitute the flexible free segment 3 of anchor rod body, and flexible free segment 3 is arranged in anchor pole bar
Between the anchoring section 1 of body and rigid free segment 2；
The material of the anchoring body 4 and rigid free body 5 uses cement base cementitious mixes, and cement base cementitious mixes are
Pea gravel concreten, mortar or cement paste；
The material of the flexibility free body 6 uses the polyurethane foam plastics of foam-in-place.
The presstressed reinforcing steel is the high tensile reinforcement that steel strand wires, steel tendon or tensile strength are greater than 400MPa.
The partition method of cement base Prestressed Rock soil anchor bolt anchoring section and free segment, comprising the following steps:
Step 1: slope surface drills:
It drills in the slope surface of foundation pit or side slope by design requirement, hole depth is equal to the length of anchoring section 1 and free segment
The sum of, wherein free segment is made of rigid free segment 2 and flexible 3 two parts of free segment, and flexible free segment 3 is close to anchoring section 1
Setting；
Step 2: placing presstressed reinforcing steel:
Presstressed reinforcing steel is inserted into the hole being drilled into step 1；
Step 3: cement injection base cementitious mixes:
Cement base cementitious mixes are injected into hole, and full of whole holes, the cement base cementitious mixes are thin
Stone concrete, mortar or cement paste；
Step 4: flexible foamed material is perfused:
Before or after step 3, conduit 7 is inserted into hole, and the end that conduit 7 is located inside hole is placed in
The intersection of anchoring section 1 and flexible free segment 3；
After completing cement injection base cementitious mixes, flexible foamed material is injected to flexible free segment 3 by conduit 7, it will
The cement base cementitious mixes in flexible 3 section of free segment are squeezed out to hole lateral direction, are located at outermost cement base in hole
Hole is discharged in cementitious mixes, and flexible foamed material forms flexible free body 6 in flexible free segment 3, and flexible free body 6 riddles
Hole section corresponding to flexible free segment 3, flexible foamed material uses the polyurethane foam plastics of foam-in-place, flexible foamed
The injection rate of material is determined by test, so that the length of flexible free segment 3 meets design requirement；The conduit 7 is disposable
Or reusable plastic tube or steel pipe, it is placed on when using disposable conduit 7 in hole and does not take out conduit 7, work as use
Withdrawal conduit 7 when the conduit 7 of recycling are cleaned out rear spare；
So far, the subregion of cement base Prestressed Rock soil anchor bolt anchoring section and free segment is completed.
Claims (3)
1. cement base Prestressed Rock soil anchor bolt, which includes outer anchor head and anchor rod body, which is characterized in that the anchor rod body
Including the presstressed reinforcing steel, anchoring body (4), rigid free body (5) and soft being set in the drilling of foundation pit slope surface or side slope surface drilling
Free love body (6), the presstressed reinforcing steel are continuous whole reinforcing bar, are divided into two parts, respectively anchoring section presstressed reinforcing steel, freedom
Section presstressed reinforcing steel, anchoring section presstressed reinforcing steel is located at the drilling of foundation pit slope surface or side slope surface drilling is inboard, free segment presstressed reinforcing steel point
For rigid free segment presstressed reinforcing steel and flexible free segment presstressed reinforcing steel, be enclosed with outside free segment presstressed reinforcing steel anti-corrosion separation layer and
Oversheath；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 club shaft；The rigidity free body (5) is arranged outside rigid free segment presstressed reinforcing steel, rigid free body (5)
The rigid free segment (2) of anchor rod body is constituted with rigid free segment presstressed reinforcing steel；The flexibility free body (6) be arranged it is flexible from
Outside section presstressed reinforcing steel, the flexible free segment of flexible free body (6) and flexible free segment presstressed reinforcing steel composition anchor rod body
(3), flexible free segment (3) is arranged between the anchoring section (1) of anchor rod body and rigid free segment (2).
2. cement base Prestressed Rock soil anchor bolt according to claim 1, it is characterised in that: outside the free segment presstressed reinforcing steel
Portion is enclosed with anti-corrosion separation layer and oversheath.
3. cement base Prestressed Rock soil anchor bolt according to claim 1, it is characterised in that: the anchor rod body further includes leading
It manages (7), the conduit (7) is set in parallel with presstressed reinforcing steel, and one end end of conduit (7) is located at anchoring section (1) and flexibility certainly
By the intersection of section (3), the other end of conduit (7) protrudes from anchoring section (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920097019.0U CN209669868U (en) | 2019-01-21 | 2019-01-21 | Cement base Prestressed Rock soil anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920097019.0U CN209669868U (en) | 2019-01-21 | 2019-01-21 | Cement base Prestressed Rock soil anchor bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209669868U true CN209669868U (en) | 2019-11-22 |
Family
ID=68566254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920097019.0U Withdrawn - After Issue CN209669868U (en) | 2019-01-21 | 2019-01-21 | Cement base Prestressed Rock soil anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209669868U (en) |
-
2019
- 2019-01-21 CN CN201920097019.0U patent/CN209669868U/en not_active Withdrawn - After Issue
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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: 20191122 Effective date of abandoning: 20230223 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191122 Effective date of abandoning: 20230223 |