CN101333815B - Concrete anchor rod and its construction method - Google Patents
Concrete anchor rod and its construction method Download PDFInfo
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- CN101333815B CN101333815B CN2008100213182A CN200810021318A CN101333815B CN 101333815 B CN101333815 B CN 101333815B CN 2008100213182 A CN2008100213182 A CN 2008100213182A CN 200810021318 A CN200810021318 A CN 200810021318A CN 101333815 B CN101333815 B CN 101333815B
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Abstract
The invention discloses a concrete anchor rod and the construction method thereof; the concrete anchor rod comprises an anchor rod body, an anchor head and an anchoring body, and is characterized in that the concrete anchor rod also comprises a waterstop top plate; the anchor rod body is constructed by thread steel through spot welding; the anchor rod is welded with at least 4 centering supports; the anchor rod is bent 90 degrees on the top surface concrete of the bottom plate; the waterstop top plate is mounted on the 1/2 height position of anchor rod body, where the anchor rod body is anchored into the foundation base plate; meanwhile, the construction method of the concrete anchor rod is disclosed; because the waterstop steel plate is arranged in the concrete anchor rod and the construction method thereof in the invention, the concrete anchor rod has good waterproof property; the anti-floating capability of the anchor rod is improved because a plurality of measurements are adopted in the construction.
Description
Technical field
The present invention relates to a kind of concrete anchor rod and job practices thereof, belong to the building unit production field.
Background technology
Development along with urban construction, the basement of high-rise building and underground structure are more and more, to buoyancy occur at the works foundation bed when the buried depth of basement surpasses groundwater table, with the increase of buried depth, the anti-floating problem of underground structure is also more and more outstanding.Solve the anti-floating problem, what adopt usually both at home and abroad is reinforced concrete member, this member is because the raw material consumption is big, cost is higher, what anchor pole used in anti-floating in addition is more and more, various anchor poles also occur in succession, as being to disclose a kind of concrete anchor rod and construction technology thereof in the application of CN200710012437.7 at number of patent application, it is to be made of steel strand, form anchor, anchoring body each several part, it is characterized in that steel strand are fixed on the form anchor, form anchor and taper anchor head are linked to be overall structure; The concrete anchor solid is fed in the complete boring of pre-subdrilling; Then, before the anchoring body initial set,, adopt the steel conduit that skeleton is inserted in the boring, and make the anchor head point be in foot of hole the skeleton that combines is installed; Lay down the guider of conduit upper end, propose conduit, whole construction is promptly finished, and is characterized in reducing rolled steel dosage, reduce cost, but anchor bar body is not considered special waterproofing work, stays hidden danger to base plate leakage, and water resistance is good inadequately.
Summary of the invention
Technical problem to be solved by this invention provides the concrete anchor rod that a kind of water resistance is good, the anti-floating ability is strong.
For solving the problems of the technologies described above, the invention provides a kind of concrete anchor rod and job practices thereof.
Concrete anchor rod of the present invention comprises: anchor bar body, anchor head and anchoring body, it is characterized in that also comprising the sealing top board, and anchor bar body is formed by screw-thread steel spot welding; Anchor bar body is welded with and is no less than 4 roads to medium-height trestle, and anchor pole bends 90 ° under the plate top surface concrete, and described sealing top board is installed in 1/2 place that anchors into the sole plate height at anchor bar body.Described anchor bar body is formed every 1.0m spot welding by Φ 22 screw-thread steels; Anchor bar body is every one of 6.5 pairs of medium-height trestle of 2.0m weldering φ and be no less than 4 roads; The length that anchor bar body anchors into sole plate is 300mm, and the 100mm place bends 90 ° under the plate top surface concrete, bends straight segment length 400mm; Anchor hole diameter 110mm presses filling closely knit with the M30 cement mortar; Penetrate the steel plate for sealing water that processes 150mm place to the inflection point during assembling earlier, it is of a size of 140mm * 110mm * 3mm.
Described anchor head is the enlarged footing of rounding stage body shape, and described anchor top can be the rounding stage body shape of 810mm/310mm, and sealing top board 2 is of a size of 140mm * 110mm * 3mm.
Be the job practices of above-mentioned concrete anchor rod below.Fig. 2 is the process chart of work progress.
1) anchor hole location and pore-forming;
2) anchor pole assembling: anchor pole is by Φ 22 reinforcement fabrications, earlier reinforcing bar is carried out straight rust cleaning oil removal treatment before the assembling, and press anchor pole design length blanking processing sample muscle, penetrate the steel plate for sealing water that processes during assembling earlier, 150mm place to the inflection point is with 6.5 pairs of medium-height trestles of the two-sided full weld 4 road Φ of electric welding.
3) anchor pole is laid: before anchor pole is put into anchor hole, once more hole depth is checked, guarantee that hole depth adheres to specification, adhere to specification for guaranteeing that anchor pole anchors into floor length and goes into hole depth, before laying, on the concrete bed course of anchor hole both sides, respectively places anchor pole a cushion block that 150mm is high, body of rod steel plate for sealing water is shelved on the cushion block, simultaneously Grouting Pipe is put into the hole in the lump with the body of rod, Grouting Pipe is not less than 42mm with being about the 4.0m internal diameter, the PVC hard plastic tube that all sides are opened Φ 4, quincuncial arrangement aperture in the 200mm place, lower end is made, and the end is not more than 200mm at the bottom of the hole.
4) pressure grouting: anchor hole before the mud jacking, calculates the grouting amount of good each anchor hole with the perfusion of M30 cement mortar in advance, and carries out moistening with no sand cement slurry to grouting pump and Grouting Pipe; During slip casting, grouting pump keeps the pressure of 0.8～1.5MPa, when the aperture stops exhaust and bleeding occurs Grouting Pipe is slowly extracted, and with pulling out with promoting up and down, make the slurry pore fill up mortar, whether the mud jacking amount of checking grouting pump simultaneously is greater than amount of calculation, full to guarantee the anchor hole mortar.Slip casting highly is controlled at 20-30mm place under the cushion layer concrete face, so that anchor pole is irritated polyurethane waterproofing coating.
Anchor pole of the present invention and job practices thereof are owing to being provided with steel plate for sealing water, so water resistance is good; And owing in construction sequence, taked multiple measure, thereby improved the anti-floating ability of anchor pole.
Description of drawings
Fig. 1 is the structural representation of anchor pole of the present invention;
Fig. 2 is the process chart of anchor bolt construction process.
The specific embodiment
Described anchor bar body 4 is formed every 1.0m spot welding by Φ 22 screw-thread steels; Anchor bar body 4 is every 6 pairs of medium-height trestles of 2.0m weldering φ 6 one and be no less than 4 roads; The length that anchor pole anchors into sole plate 1 is 300mm, and the 100mm place bends 90 ° under the plate top surface concrete, bends straight segment length 400mm; Anchor hole diameter 110mm presses filling closely knit with the M30 cement mortar; Penetrate the steel plate for sealing water 2 that processes 150mm place to the inflection point during assembling earlier, it is of a size of 140mm * 110mm * 3mm, with 6.5 pairs of medium-height trestles 6 of the two-sided full weld 4 road Φ of electric welding.
Described anchor head 7 is the enlarged footing of rounding stage body shape, and described anchor head can be the rounding stage body shape of 810mm/310mm, and sealing top board 2 is of a size of 140mm * 110mm * 3mm.
Anchoring body 5 used cement are selected the early strong Portland cement of 52.5# for use, and fines is selected the fine sand of particle diameter less than 2mm, mud content＜3% for use.
Anchoring body cement mortar design strength grade is M30, and proportioning is a cement: sand: water: early strength admixture=1: 2.35: 0.49: 0.04, and on-the-spot moisture content according to sand is adjusted to the construction match ratio, guarantees that water/binder ratio 0.49 is constant.
Be the job practices of anchor pole below:
Fig. 2 is the process chart of work progress.
1. anchor hole is located and pore-forming;
2. anchor pole assembling: anchor pole is by 2 Φ, 22 reinforcement fabrications, earlier reinforcing bar is carried out straight rust cleaning oil removal treatment before the assembling, and press the blanking of anchor pole design length and process the sample muscle, after project quality person's acceptance(check), assemble, penetrate the steel plate for sealing water 2 that processes during assembling earlier, be of a size of 140mm * 110mm * 3mm, 150mm place to the inflection point is with 6.5 pairs of medium-height trestles of the two-sided full weld 4 road Φ of electric welding.
3. anchor pole is laid: before anchor pole is put into anchor hole, once more hole depth is checked, guarantee that hole depth adheres to specification, adhere to specification for guaranteeing that anchor pole anchors into floor length and goes into hole depth, before laying, on the concrete bed course of anchor hole both sides, respectively places anchor pole a cushion block 3 that 150mm is high, body of rod steel plate for sealing water 2 is shelved on the cushion block 3, simultaneously Grouting Pipe is put into the hole in the lump with the body of rod, Grouting Pipe is not less than 42mm with being about the 4.0m internal diameter, lower end 200mm, the PVC hard plastic tube that interior all sides are opened Φ 4, quincuncial arrangement aperture is made, and the end is not more than 200mm at the bottom of the hole.
4. pressure grouting: with the perfusion of M30 cement mortar, before the mud jacking, calculate the grouting amount of good each anchor hole in advance by the designing requirement anchor hole, and carry out moistening to grouting pump and Grouting Pipe with no sand cement slurry; During slip casting, grouting pump keeps the pressure of 0.8～1.5MPa, when the aperture stops exhaust and bleeding occurs Grouting Pipe is slowly extracted, and with pulling out with promoting up and down, make the slurry pore fill up mortar, whether the mud jacking amount of checking grouting pump simultaneously is greater than amount of calculation, full to guarantee the anchor hole mortar.Slip casting highly is controlled at 20-30mm place under the cushion layer concrete face, so that anchor pole is irritated polyurethane waterproofing coating.
The control of anchor hole diameter:
The design of this engineering anchor hole diameter all is 110mm.For guaranteeing the anchor hole diameter, select for use catercorner length to be not less than the annular alloy bit of 108mm according to the diameter of the supporting drill bit of rig, adopt comminuted hole forming method construction.Drilling depth control:
The rock degree of depth of going into of the whole anchor poles of designing requirement is before 4.0m (from base plate fish tail and waterproof layer end face meter) holes; determine according to the design thickness of going into the rock degree of depth and bed course, fish tail and waterproof layer concrete: all drilling depths of directly creeping at basement rock are not less than 3.85m; allly creep into from the concrete bedding plane; drilling depth is not less than 3.95m, and makes a mark on drilling rod in advance.
The control of anchorage length when anchor pole is assembled and laid:
Before the anchor pole assembling, process single anchor pole sample muscle earlier, batch machining after project quality person's inspection meets the requirements, and on the anchor bar body after the assembling, mark the length that anchors into bottom board concrete; Once more to the hole depth inspection, and place the thick cushion block of 150mm before anchor pole is laid, the steel plate for sealing water of anchor pole just in time is shelved on the cushion block, the length of going into the rock degree of depth and going in the base plate of anchor pole is effectively controlled in the anchor hole both sides.
The grout and mortar quality control:
The strength of cement mortar grade of design anchor hole is M30, in addition, remains grouting pressure during slip casting and is not less than 0.8Mpa, and the grouting amount in good each aperture of calculated in advance, check actual mud jacking amount during mud jacking, guarantee mud jacking amount 〉=amount of calculation.Through above control, reservation reached M39 with mortar in 16 days with the condition curing test block.
The waterproofing work of anchor bar body:
Except 1/2 place that anchors into the base plate height at anchor bar body increased weldering 140 * 110 * 3 steel plate for sealing water, in bolthole when grouting,, 20-30mm did not irritate at the place in advance under the cushion layer concrete surface, treat that bottom board concrete is done waterproof construction before, full irrigation polyurethane waterproofing coating in the hole.In addition, before the large-area construction, every anchor pole root is done 500 * 500 (4mmSBS) waterproof extra play earlier and is strengthened.
Claims (2)
1. the job practices of a concrete anchor rod, described concrete anchor rod comprises: anchor bar body (4), anchor head (7) and anchoring body (5), also comprise sealing top board (2), anchor bar body (4) is formed by screw-thread steel spot welding, anchor bar body (4) bends 90 ° under the plate top surface concrete, described sealing top board (2) is installed in 1/2 place that anchor bar body anchors into sole plate (1) height, and described anchor bar body (4) is formed every 1.0m spot welding by Φ 22 screw-thread steels; Anchor bar body (4) is every one of 2.0m weldering 6.5 pairs of medium-height trestle of φ (6) and be no less than 4 roads; The length that anchor bar body (4) anchors into sole plate (1) is 300mm, and the 100mm place bends 90 ° under the plate top surface concrete, bends straight segment length 400mm; Anchor hole diameter 110mm presses filling closely knit with the M30 cement mortar; Penetrate the steel plate for sealing water (2) that processes 150mm place to the inflection point during assembling earlier, it is of a size of 140mm * 110mm * 3mm, it is characterized in that: may further comprise the steps:
1) anchor hole location and pore-forming;
2) anchor pole assembling: anchor pole is by 2 Φ, 22 reinforcement fabrications, earlier reinforcing bar is carried out straight rust cleaning oil removal treatment before the assembling, and press anchor pole design length blanking processing sample muscle, penetrate the steel plate for sealing water that processes during assembling earlier, 150mm place to the inflection point is with 6.5 pairs of medium-height trestles of the two-sided full weld 4 road Φ of electric welding;
3) anchor pole is laid: before anchor pole is put into anchor hole, once more hole depth is checked, guarantee that hole depth adheres to specification, adhere to specification for guaranteeing that anchor pole anchors into floor length and goes into hole depth, before laying, on the concrete bed course of anchor hole both sides, respectively places anchor pole a cushion block that 150mm is high, body of rod steel plate for sealing water is shelved on the cushion block, simultaneously Grouting Pipe is put into the hole in the lump with the body of rod, Grouting Pipe is not less than 42mm with being about the 4.0m internal diameter, the PVC hard plastic tube that all sides are opened Φ 4, quincuncial arrangement aperture in the 200mm place, lower end is made, and the end is not more than 200mm at the bottom of the hole;
4) pressure grouting: anchor hole before the mud jacking, calculates the grouting amount of good each anchor hole with the perfusion of M30 cement mortar in advance, and carries out moistening with no sand cement slurry to grouting pump and Grouting Pipe; During slip casting, grouting pump keeps the pressure of 0.8～1.5MPa, when the aperture stops exhaust and bleeding occurs, Grouting Pipe is slowly extracted, and with pulling out with promoting up and down, make the slurry pore fill up mortar, whether the mud jacking amount of checking grouting pump simultaneously is greater than amount of calculation, full to guarantee the anchor hole mortar, slip casting highly is controlled at 20-30mm place under the cushion layer concrete face, so that anchor pole is irritated polyurethane waterproofing coating.
2. the job practices of concrete anchor rod according to claim 1 is characterized in that: during bolthole grouting, 20-30mm does not irritate at the place in advance under the cushion layer concrete surface, treat that bottom board concrete is done waterproof construction before, full irrigation polyurethane waterproofing coating in the hole; In addition, before the large-area construction, every anchor pole root is done the waterproof extra play enhancing of 500mm * 500mm size earlier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100213182A CN101333815B (en) | 2008-07-31 | 2008-07-31 | Concrete anchor rod and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100213182A CN101333815B (en) | 2008-07-31 | 2008-07-31 | Concrete anchor rod and its construction method |
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| Publication Number | Publication Date |
|---|---|
| CN101333815A CN101333815A (en) | 2008-12-31 |
| CN101333815B true CN101333815B (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100213182A Expired - Fee Related CN101333815B (en) | 2008-07-31 | 2008-07-31 | Concrete anchor rod and its construction method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677685B (en) * | 2012-05-31 | 2014-11-19 | 重庆大学 | Surface fracture racheling and reinforcing method of dangerous rock |
| CN103132457B (en) * | 2013-03-25 | 2014-12-03 | 中国建筑股份有限公司 | Tension locking force self-equalized hollow spherical hinge of multi-beam anchor rods or anchor cables and construction method thereof |
| CN103821144B (en) * | 2014-03-14 | 2016-08-24 | 中国建筑第八工程局有限公司 | Anti-float anchor rod water proof structure and construction method thereof |
| CN104947683B (en) * | 2015-05-22 | 2016-11-30 | 中建三局第一建设工程有限责任公司 | For preventing link plate and the construction method thereof of foundation pit side-wall seepage |
| CN106639159B (en) * | 2016-12-22 | 2018-11-27 | 中国核工业二四建设有限公司 | A kind of positioning assembling device and method for prestressed anchor firmware |
| CN107060849A (en) * | 2017-03-23 | 2017-08-18 | 中铁五局集团成都工程有限责任公司 | Exposed anchor pole head reserves the construction method of groove |
| CN107447765B (en) * | 2017-05-24 | 2019-07-09 | 四川君羊建设集团有限公司 | Side slope construction supported with framed anchor construction |
| US11933062B2 (en) | 2019-10-29 | 2024-03-19 | Philip John Elpers | Vibration damping anchoring system |
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- 2008-07-31 CN CN2008100213182A patent/CN101333815B/en not_active Expired - Fee Related
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Granted publication date: 20110921 Termination date: 20200731 |