CN202482860U - Self-drilling helical anchor rod - Google Patents
Self-drilling helical anchor rod Download PDFInfo
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- CN202482860U CN202482860U CN2012200916885U CN201220091688U CN202482860U CN 202482860 U CN202482860 U CN 202482860U CN 2012200916885 U CN2012200916885 U CN 2012200916885U CN 201220091688 U CN201220091688 U CN 201220091688U CN 202482860 U CN202482860 U CN 202482860U
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- anchor rod
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Abstract
The utility model discloses a self-drilling helical anchor rod which applies to the anchorage side slope support engineering in a weak soil area. A helical anchor rod body is provided with slurry outlet holes. The front end of the helical anchor rod body is sealed. Helical blades are welded on the front end of the anchor rod body, and a stirring blade is welded on the anchor rod body at the rear of the helical blade. Cement slurries can be infused while the anchor rod body drills, slurries are shot out from the slurry outlet holes of the anchor rod body and are mixed with soil bodies which are cut down by the helical blades on the front end of the anchor rod body, the stirring blade arranged at the rear of the helical blades evenly mixes the soil bodies with the cement slurries, an irregular anchorage body is formed after solidification, and anchorage force is increased. The self-drilling helical anchor rod enables drilling to be integrated with slurry-infusion, the pressure influence on the foundation pit side wall due to the later slurry-infusion is avoided, meanwhile, slurry-infusion pressure can be effectively controlled, and slurry-infusion quality is guaranteed.
Description
Technical field
The utility model relates to the construction equipment and the job practices of building operations foundation pit supporting project; Particularly a kind of self-drilling spiral anchor rod; Be applicable to that the soft clay area anchor draws the support engineering of side slope, especially be applicable in the foundation pit supporting project of the soft clay area infrastructure that the Huanghe delta is such.
Background technology
Area, the Huanghe delta belongs to the alluvial plain of cohesive soil, silt and the flour sand formation of recent deposit in the Quaternary Period, and bury of groundwater is more shallow, generally is no more than 1m.
To the soft clay area of rich groundwater,, generally do not allow to cheat outer precipitation in order to keep the foundation ditch external environment unaffected.Outside can not cheating under the situation of precipitation; The preexisting hole prestressed anchor construction technology that traditional foundation pit supporting project adopts; Because construction sequence is more loaded down with trivial details, mechanically actuated is complicated, and the easy generation reasons such as drift sand phenomenon and efficiency of construction are low of leaking make it be difficult to realize.Outside the hole, do not carry out under the situation of precipitation, the formula technology of ramming is fit to the pattern foundation pit supporting structure anchor bolt construction of the soft clay area of rich groundwater very much, carries out pattern foundation pit supporting structure, has certain drawback but adopt the formula of ramming to be driven into prestressed anchor in this kind area.The front end of this anchor pole is flat-shaped, and the body of rod is provided with slurry outlet, rams stratum cement injection more earlier.In its slip casting process, slip casting time, grouting pressure, grouting amount are difficult to control, cause slip casting effect to receive very big influence, can't reach the prestressing force effect of expection.At present job site anchor pole commonly used also has the preexisting hole anchor pole, and this anchor pole is on foundation pit walls, to hole by designing requirement length, after the boring with steel strand or reinforcing bar together with Grouting Pipe, like pvc pipe, together put into the hole, carry out slip casting then.This technology construction cost is low, but after preexisting hole is used in the saturated soft soil area, causes the hole phenomenon of collapsing easily, has seriously reduced operating efficiency, and adopts the slip casting effect of grouting behind shaft or drift lining also undesirable.
Summary of the invention
The purpose of the utility model provides a kind of self-drilling spiral anchor rod, can in the foundation pit supporting project of the soft formation of similar Huanghe delta soft clay area, use.Solve bad, the hypodynamic problem of tension of bolt grouting effect in the present soft clay area foundation pit supporting project.
The technical solution of the utility model is: a kind of self-drilling spiral anchor rod comprises anchor rod body; Its body of rod is provided with slurry outlet; The sealing of the front end of anchor rod body is welded on the front end of anchor rod body with helical blade, on the anchor rod body of helical blade back, welds stirring piece.The stirring piece that helical blade is provided with at the back evenly stirs the soil body and cement paste, solidifies the back and forms irregular anchoring body, increases its anchored force.
The utlity model has following significant effect: the utility model can integrate preexisting hole anchor pole and the advantage of ramming the formula anchor pole, is applicable to the outer not situation of precipitation in hole, adopts slurry outlet and stirs curing process with boring slip casting, and slip casting effect is good.Use the self-drilling spiral anchor rod to creep into, adopt the pile-anchor retaining mode, the duration is short, and construction costs is lower, does not influence basement structure construction.Creeping into slip casting of self-drilling spiral anchor rod is integrated, and the pressure influence of having avoided grouting behind shaft or drift lining that foundation pit side-wall is produced can effectively be controlled grouting pressure simultaneously, can guarantee grouting quality.Through spiral anchor rod is applied prestressing force, can the ACTIVE CONTROL soil deformation, adjustment soil body stress state helps the stability of side slope.This self-drilling spiral anchor rod working security is high, and uplift resistance is strong, more can guarantee surrounding enviroment safety.Be mainly reflected in:
1, the self-drilling spiral anchor rod in the utility model is simple for production; Simple structure; Through welding helical blade in the anchor pole end; Have extremely strong penetration power at this blade of soft clay area, reduced and crept into difficulty, and the form of structure of helical blade can improve the uplift resistance of anchor pole in each soil layer effectively.
2, use screwed seamless steel pipe material in the utility model, when cooperating helical blade to accomplish boring, improved the side friction of anchor rod body.
3, the slurry outlet on the utility model self-drilling spiral anchor rod is positioned at the helical blade rear side, in the process of anchor pole rotation propelling soil layer, carries out slip casing by pressure, and slurry penetrates from slurry outlet; With front end helical blade cutting down the soil body stirs and lumps together, helical blade is provided with stirring piece at the back, can the soil body and cement paste evenly be stirred; The soil body is fully combined with slurry; Solidify the back and form irregular anchoring body, increase its anchored force, guarantee the validity of its support engineering.
4, the utility model structure design is simple, is easy to construction, and construction technology is safe and reliable.Through the enforcement of the utility model, improved efficiency of construction and construction quality, improved economic benefit.
Description of drawings
Accompanying drawing is the structural representation of the utility model self-drilling spiral anchor rod.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description; Referring to accompanying drawing; A kind of self-drilling spiral anchor rod comprises anchor rod body 3, and its body of rod is provided with slurry outlet 2, the front end sealing of anchor rod body 3; Helical blade 1 is welded on the front end of anchor rod body 3, welding stirring piece 4 on the anchor rod body 3 of helical blade 1 back.The slurry outlet 2 of a kind of embodiment is arranged on the anchor rod body 3 of helical blade 1 rear side, and its aperture is 4mm-8mm, like 5mm, 7mm, 8mm etc.Slurry outlet 2 is set directly at 3 last times of anchor rod body, and its aperture is smaller, can strengthen its jet power, prevents that the soil body from stopping up slurry outlet 2.The slurry outlet 2 of another kind of embodiment is the outlet pipes that are welded on the anchor rod body 3; Be arranged on the rear side of helical blade 1; Its outlet pipe is straight tube or conical pipe, and its nozzle diameter is 8mm-12mm, like 9mm, 10mm or the like; The outlet pipe that uses welding helps more preventing that as slurry outlet 2 earth from stopping up.Anchor rod body 3 is seamless threaded steel pipes, and its front end is provided with a helical blade 1 at least, and this helical blade 1 is more conducive to creep into apart from the leading section 10cm-15cm of anchor rod body 3; Spacing between the helical blade 1 is at 25cm-35cm, and the spiral angle of helical blade 1 and anchor rod body 3 is between 28 degree-32 degree; The 15cm-25cm place is provided with stirring piece 4 in helical blade 1 back.Stirring piece 4 is crisscross arranged on anchor rod body 3, is provided with 3 at least, and the spacing between the stirring piece 4 is between 15cm-25cm, and the angle of anchor rod body 3 is between 40 degree-50 degree.Illustrated helical blade 1 is provided with 2, and stirring piece 4 is provided with 4.The rear end of anchor rod body 3 connects lengthening anchor pole 6 through adapter sleeve 5, more is applicable to dark and big foundation pit supporting project.
Multifunctional drill and Grouting Pipe are connected with the rear end of anchor rod body 3 or are connected with the rear end of lengthening anchor pole 6, cement injection when anchor rod body 3 creeps into, the marginal not slurry is crept on the limit; Its slurry is penetrated from the slurry outlet 2 of anchor rod body 3; With front end helical blade 1 cutting down the soil body stirs and lumps together, the stirring piece 4 that helical blade 1 back is provided with evenly stirs the soil body and cement paste; Solidify the back and form irregular anchoring body, increase its anchored force.According to the construction characteristic of this self-drilling spiral anchor rod, adopting model is that MDL-120D1 type multifunctional drill is drilling construction equipment and slip casting simultaneously.During use, the power adapter sleeve of MDL-120D1 type multifunctional drill is connected with the rear end of anchor rod body 3 or with the rear end of lengthening anchor pole 6, the anti-drilling joint of power adapter sleeve rear end is connected with Grouting Pipe and passes through Grouting Pipe is connected with grouting equipment.
After treating that anchoring body reaches the requirement of strength of design, again this spiral anchor rod is applied prestressing force.At first channel-section steel is suspended on this anchor pole, can acts synergistically, add a liner plate in the stretch-draw side of channel-section steel for making this anchor pole and waist rail, after the stretch-draw with locked with bolts.Tensioning fixation should notice that each parts combines closely, should after applying prestressing force, continue bolt to be locked in ten minutes again, and the prestressing force that applies with assurance reaches designing requirement.
Claims (6)
1. self-drilling spiral anchor rod; Comprise anchor rod body (3); Its body of rod is provided with slurry outlet (2), it is characterized in that the front end sealing of anchor rod body (3); Helical blade (1) is welded on the front end of anchor rod body (3), goes up welding stirring piece (4) at the anchor rod body (3) of helical blade (1) back.
2. a kind of self-drilling spiral anchor rod according to claim 1 is characterized in that, said slurry outlet (2) is arranged on the anchor rod body (3) of helical blade (1) rear side, and its aperture is 4mm-8mm.
3. a kind of self-drilling spiral anchor rod according to claim 1 is characterized in that, and is described
Go outSlurry hole (2) is the outlet pipe that is welded on the anchor rod body (3), is arranged on the rear side of helical blade (1), and its outlet pipe is straight tube or conical pipe, and its nozzle diameter is 8mm-12mm.
4. according to claim 1 or 2 or 3 described a kind of self-drilling spiral anchor rods; It is characterized in that; Described anchor rod body (3) is seamless threaded steel pipe, and its front end is provided with a helical blade (1) at least, and this helical blade (1) is apart from the leading section 10cm-15cm of anchor rod body (3); Spacing between the helical blade (1) is at 25cm-35cm, and the spiral angle of helical blade (1) and anchor rod body (3) is between 28 degree-32 degree; The 15cm-25cm place is provided with stirring piece (4) in helical blade (1) back.
5. a kind of self-drilling spiral anchor rod according to claim 4; It is characterized in that; Described stirring piece (4) is crisscross arranged on anchor rod body (3); At least be provided with 3, the spacing between the stirring piece (4) is between 15cm-25cm, and the angle of anchor rod body (3) is between 40 degree-50 degree.
6. a kind of self-drilling spiral anchor rod according to claim 5 is characterized in that, the rear end of described anchor rod body (3) connects lengthening anchor pole (6) through adapter sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200916885U CN202482860U (en) | 2012-03-13 | 2012-03-13 | Self-drilling helical anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200916885U CN202482860U (en) | 2012-03-13 | 2012-03-13 | Self-drilling helical anchor rod |
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| Publication Number | Publication Date |
|---|---|
| CN202482860U true CN202482860U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200916885U Expired - Lifetime CN202482860U (en) | 2012-03-13 | 2012-03-13 | Self-drilling helical anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202482860U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587366A (en) * | 2012-03-13 | 2012-07-18 | 胜利油田胜利工程建设（集团）有限责任公司 | Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing |
| CN106121696A (en) * | 2016-08-12 | 2016-11-16 | 中冶华天工程技术有限公司 | Anchor tube and the installation method of anchor tube and recovery method |
| CN109025824A (en) * | 2018-08-16 | 2018-12-18 | 招远市铱璐光电科技有限公司 | Drilling machine people is surveyed in a kind of armor crab seabed |
| CN110344865A (en) * | 2019-07-18 | 2019-10-18 | 江苏科技大学 | A kind of magnetic principle reinforces anchor pole and its construction method |
-
2012
- 2012-03-13 CN CN2012200916885U patent/CN202482860U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587366A (en) * | 2012-03-13 | 2012-07-18 | 胜利油田胜利工程建设（集团）有限责任公司 | Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing |
| CN106121696A (en) * | 2016-08-12 | 2016-11-16 | 中冶华天工程技术有限公司 | Anchor tube and the installation method of anchor tube and recovery method |
| CN109025824A (en) * | 2018-08-16 | 2018-12-18 | 招远市铱璐光电科技有限公司 | Drilling machine people is surveyed in a kind of armor crab seabed |
| CN110344865A (en) * | 2019-07-18 | 2019-10-18 | 江苏科技大学 | A kind of magnetic principle reinforces anchor pole and its construction method |
| CN110344865B (en) * | 2019-07-18 | 2020-11-24 | 江苏科技大学 | Magnetic principle reinforced anchor rod and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SINOPEC OILFIELD SERVICE CORPORATION Free format text: FORMER OWNER: SHENGLI ENGINEERING CONSTRUCTION (GROUP) CORPORATION LTD. OF SHENGLI OIL FIELD Effective date: 20150121 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 257000 DONGYING, SHANDONG PROVINCE TO: 100029 CHAOYANG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150121 Address after: 100029 Beijing City, Chaoyang District Hui Street No. six twelfth floor Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Address before: 257000 No. two, 755 North Road, Dongying District, Shandong, Dongying Patentee before: Shengli Engineering Construction (Group) Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
|
| CX01 | Expiry of patent term |