CN202509532U - Multi-rib tension type anti-floating anchor - Google Patents
Multi-rib tension type anti-floating anchor Download PDFInfo
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- CN202509532U CN202509532U CN2011205439233U CN201120543923U CN202509532U CN 202509532 U CN202509532 U CN 202509532U CN 2011205439233 U CN2011205439233 U CN 2011205439233U CN 201120543923 U CN201120543923 U CN 201120543923U CN 202509532 U CN202509532 U CN 202509532U
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- anchor rod
- anchor
- tension type
- grouting pipe
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Abstract
The utility model discloses a multi-rib tension type anti-floating anchor, which can resist quite a large underground water buoyancy, effectively protect the anchor from corrosion damage by the underground environment, and prolong the service lifetime of the anchor. The technical scheme of the utility model is that the multi-rib tension type anti-floating anchor comprises an anchor body; the anchor body is disposed in a hole of rock soil and is composed of over two threaded steel bars; the anchor body is provided with over one positioning rack, and the anchor body and the positioning rack are coated by an anchorage body; a grouting pipe is disposed in the anchorage body, and is bound to the anchor body. Compared with the prior art, a plurality of anchor bodies are provided with over one positioning rack, and the anchor body and the positioning rack are coated by the anchorage body formed by cement setting. Compared with a single-rib tension type anti-floating anchor, the multi-rib tension type anti-floating anchor has quite a large anti-pulling force and can resist quite a large underground water buoyancy.
Description
Technical field
The utility model relates to a kind of construction work foundation anti-floating technical field, relates in particular to a kind of many muscle tension type anti-float anchor rod.
Background technology
For being embedded in building such as building basement in the higher place of groundwater table, subway, underground store, civil air defense works, large pool, treatment tank; Its load that bears is complicated and changeable; It should bear dead loads such as dead load, soil pressure, also will bear because of groundwater table is higher than and cheat the buoyancy that bring the bottom surface.When buoyancy when overcoming the weight of construction of structures, will take place to float, tilt or destroy.Therefore when structure design, must control harmful vertical displacement that buoyancy brings effectively.
At present, the anti-floating technology of underground construction mainly contains the ballast method, falls and arrange intercept water method, uplift pile, anti-float anchor rod etc.The ballast method can be through strengthening concrete floor thickness with the balance buoyancy of water.Uplift pile can be adopted castinplace pile, preformed pile, and the cost of castinplace pile is high, and the distance between stake and the post is bigger, needs very thick base plate could resist moment of flexure and shearing that buoyancy produces.Falling row's method of intercepting water is initiatively to eliminate underground water, but can only be in the use down that satisfies the requirements.These technical measures respectively have pluses and minuses, can unite use.Along with the development of anchoring, anchor pole has obtained application in the underground construction anti-floating.Different according to anchor rod body with the mode of transfer force between the anchoring body, can anchor pole be divided into tension type anchor pole and pressure type anchor rod, the body of rod and the injecting cement paste of tension type anchor pole directly bond, and the body of rod of pressure anchor pole and injecting cement paste directly do not bond.When buoyancy force of underground water is bigger, adopt single reinforcement tension type anti-float anchor rod not meet the demands.
Summary of the invention
The purpose of the utility model provides a kind of many muscle tension type anti-float anchor rod, and the technical problem that solve is to resist to descend significantly water buoyancy, effectively resists the corrosion infringement of low environment to anchor pole, the application life that strengthens anchor pole.
The utility model adopts following technical scheme: a kind of many muscle tension type anti-float anchor rod; Comprise anchor rod body, said anchor rod body is arranged in the hole in the geotechnical body, and said anchor rod body is made up of the indented bars more than two; On anchor rod body, be provided with more than one locating rack; Be coated with anchoring body at anchor rod body and locating rack, be provided with Grouting Pipe in the said anchoring body, the Grouting Pipe colligation is on anchor rod body.
The diameter of the described anchor rod body of the utility model is 16-32mm.
The described anchor rod body of the utility model adopts the mode of welding to be connected with locating rack.
The described locating rack of the utility model is made up of the round steel that three middle parts are provided with protruding domes, and three round steel are mid point with the axle center of anchor rod body, is 120 and spends angles and be arranged on the anchor rod body.
The diameter of the described round steel of the utility model is 10mm.
Spacing between the described locating rack of the utility model is 1500-2000mm.
The described Grouting Pipe of the utility model is made up of first Grouting Pipe and second Grouting Pipe, and said first Grouting Pipe and the colligation of second Grouting Pipe difference are on anchor rod body.
Described first Grouting Pipe of the utility model and second Grouting Pipe are plastic material structure.
The lower end grout outlet of described first Grouting Pipe of the utility model and second Grouting Pipe is arranged on the position apart from hole 300-500mm.
The utility model compared with prior art; Adopt on the many anchor rod bodies more than one locating rack is set; It is coated with the anchoring body that thes cement solidifies and form, and makes this anchor pole have advantages such as cost is low, the construction period short, construction is convenient, saving constructional materials, reasonable stress, and economic advantages are obvious; Have good popularizing value, be specially adapted to the anti-floating engineering of works such as high-rise building basement, subway, underground store, civil air defense works, large pool, treatment tank.Compare with single reinforcement tension type anti-float anchor rod, many muscle tension type anti-float anchor rod has bigger uplift resistance, can resist bigger buoyancy force of underground water.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the sectional view of Fig. 1 along the A-A direction.
The specific embodiment
Below in conjunction with embodiment the technical scheme of the utility model is done further to specify.
As depicted in figs. 1 and 2, many muscle tension type anti-float anchor rod of the utility model comprises anchor rod body 3; Anchor rod body 3 is arranged in the hole 9 in the geotechnical body, and this anchor rod body 3 is made up of the indented bars more than 21, and diameter is 16-32mm; On the perisporium of anchor rod body 3 at interval be provided with more than one locating rack 5; This locating rack 5 is made up of the round steel 10 that three middle parts are provided with protruding domes, and three round steel 10 are that mid point is 120 and spends angles and be welded on the anchor rod body 3 with the axle center of anchor rod body 3, and the diameter of round steel 10 is 10mm; Spacing between two locating racks 5 is 1500-2000mm; External packets at anchor rod body 3 and locating rack 5 is covered with anchoring body 6, and anchoring body 6 adopts cement paste or cement mortar to solidify and forms, and said cement paste adopts Portland cement to form according to 0.45～0.50 water/binder ratio system of mixing; Cement mortar adopts Portland cement to form according to the cement-sand ratio of the 1:0.5～1:1 system of mixing; On anchoring body 6, be provided with Grouting Pipe 7; Grouting Pipe 7 is made up of first Grouting Pipe 2 and second Grouting Pipe 8; First Grouting Pipe 2 and 8 colligations of second Grouting Pipe on the anchor rod body 3 and the grout outlet of first Grouting Pipe 2 and second Grouting Pipe, 8 lower ends be arranged on the position apart from the 300-500mm of hole 9.
The basic principle of the utility model is exactly that anchor rod body and anchoring body directly bond; Utilize the frictional resistance between anchoring body and the geotechnical body to resist phreatic buoyancy, mode of transfer force is to be delivered in the geotechnical body successively through the guiding of the bonding between tension member body and anchoring body, anchoring body and geotechnical body external force.Concrete performing step is following:
1. rig pore-forming
Select rational plant equipment according to place geological conditions and designing requirement, execution conditions.Anchor pole in the rock mass should adopt the down-the-hole drill pore-forming, and the anchor pole in the soil body should adopt geological drilling rig pore-forming or down-the-hole drill pore-forming.In the anchor pole depth bounds be that main, rock mass section can adopt geological drilling rig boring more in short-term with the soil body.Armature boring must not disturbance around the stratum.When drilling depth is dark, rock mass fracture growth, be rich in underground water or when in the sand layer, creeping into, hole wall is prone to cave in, and can take the sleeve pipe retaining wall to creep into.
Make position, hole, marked according to designing requirement before the boring.Casing should be installed in the aperture, and casing can adopt the steel pipe manufacturing of pvc pipe or wall thickness 6～8mm, and casing length is preferably 1～2m, casing about 100mm above ground level; When the superficial part soil layer is weak, can increase the casing degree of depth.
2. the body of rod is made
2 of anchor rod body employings or 2 above indented barss are processed, and bar diameter is 16～32mm, and whenever at a distance from 1500～2000mm a locating rack is set along body of rod axis direction, welds between locating rack and the anchor rod body.
Before making reinforcing bar should be straight, oil removing and rust cleaning, and carry out preservative treatment by designing requirement.General brushing rustproof paint or epoxy resin coating in 2 meters scopes of anchor head.When the reinforcing bar spreading adopted welding, the fusion length of two-sided welding should be less than 5 days; When adopting sleeve to connect, should be by the regulation censorship; The finish rolling deformed bar spreading should adopt special connector.
When termination point of anchor rod anchors into the structure floor section and need bend, should confirm according to construction technology.Adopt when following pipe bit to advance and to extract the back bending in Grouting Pipe; Non-ly when advancing, should, the body of rod bend when making by designing requirement with pipe bit.Termination point of anchor rod should weld horizontal reinforcement as hanging muscle, and with the suspention body of rod, it is placed in the middle and guarantee that body of rod bottom does not directly contact with geotechnical body to be convenient to the body of rod.
Grouting Pipe comprises once grouting pipe and secondary grouting pipe, process by plastic pipe, with the anchor rod body colligation together, degree of tightness is suitable, is convenient to extract after the slip casting.
3. clean boring
Clean boring behind the anchor pole pore-forming immediately.When adopting pneumatic percussion drill, immediately with the air compressor air-supply, blow out rock slag in the hole behind the anchor hole drilling to completion as far as possible, and then change flushing with clean water till cleaning.When adopting mud to creep into, inject flushing with clean water with water pump or slurry filling machine immediately behind the drilling to completion.In the flushing process, remove the body refuse that brings out in the slurries at any time, waste water should flow to the appointed place, and can not perhaps flow in the adjacent bores in the return aperture.Must clean once again with clear water before the following body of rod, and inspection have or not collapse hole or hole at the bottom of sediment blocked up, if any should clear once more hole hole flushing.
4. descend anchor rod body
After the body of rod is made, select body of rod method for placing according to rock-bolt length, weight, construction condition and handling appliance.If the reinforcement rod body weight is light, length more in short-term, slowly insert in the hole after can adopting the geological drilling rig boring tower to sling.If the reinforcement rod body weight is heavier, when length is longer, should adopt special handling appliance such as mobile crane, tower crane to hang assigned address.
The body of rod is transferred in the process, can not damage the body of rod, Grouting Pipe and anticorrosive coat, and needs the body of rod is placed in the middle, aperture suspention, and body of rod bottom can not be inserted in body refuse or the soil layer.If the body of rod fails to insert smoothly desired depth, then should the body of rod be extracted, insert again after the clear again hole hole flushing.
5. slip casting
Many muscle tension type anti-float anchor rod adopts the secondary grouting mode, and purpose is to make anchoring body closely knit more full, avoids influencing anchor-holding force of anchor bolt because of the anchoring body leakiness.
Mix system cement paste or cement mortar according to designing requirement, water/binder ratio is preferably 0.45～0.5.The cement-sand ratio of cement mortar should be joined in on-the-spot examination, satisfies mobile, pumpability, and cement-sand ratio is preferably 1:0.5～1:1.For improve slurry in work progress with the sclerosis after performance, can mix Admixture in right amount, to the anchor pole in the rock mass, should add an amount of expansion agent.For soil bolt, injecting cement paste compressive strength should be greater than 20MPa; For rock bolt, injecting cement paste compressive strength should be greater than 30MPa.
Slurries should leave in the special container after mixing system, and make its slow stirring, and before initial set, use up.Slurries inject in the anchor hole through withstand voltage Grouting Pipe with pump.Once grouting is a common pressure grouting, injects cement paste or cement mortar, and Grouting Pipe should be inserted apart from 300～500mm place at the bottom of the hole, and slurries are continous pouring from bottom to top, and guarantees smooth drainage exhaust in the hole., the aperture can stop slip casting when overflowing slurries.Once grouting Guan Yi extracts.Injecting paste material is a cement paste, carries out after secondary grouting blanking time should reaching 5MPa in the anchoring body intensity that once grouting forms, generally should perfusion in 4～6 hours after initial set, and grouting pressure is not less than 2MPa.
6. maintenance
The body of rod must not be arbitrarily knocked after the slip casting, also weight must not be on the body of rod, hung.Curing time should be no less than 28 days.Before the initial set, slurries shrink in the hole, should in time mend grouting liquid.
Claims (9)
1. the anti-float anchor rod of muscle tension type more than a kind; Comprise anchor rod body (3); Said anchor rod body (3) is arranged in the hole (9) in the geotechnical body; It is characterized in that: said anchor rod body (3) is made up of the indented bars more than two (1), on anchor rod body (3), is provided with more than one locating rack (5), is coated with anchoring body (6) at anchor rod body (3) and locating rack (5); Be provided with Grouting Pipe (7) in the said anchoring body (6), Grouting Pipe (7) colligation is on anchor rod body (3).
2. many muscle tension type anti-float anchor rod according to claim 1 is characterized in that: the diameter of said anchor rod body (3) is 16-32mm.
3. many muscle tension type anti-float anchor rod according to claim 2 is characterized in that: said anchor rod body (3) adopts the mode of welding to be connected with locating rack (5).
4. many muscle tension type anti-float anchor rod according to claim 1; It is characterized in that: said locating rack (5) is made up of the round steel (10) that three middle parts are provided with protruding domes; Three round steel (10) are mid point with the axle center of anchor rod body (3), and 120 degree angles are arranged on the anchor rod body (3).
5. many muscle tension type anti-float anchor rod according to claim 4 is characterized in that: the diameter of said round steel (10) is 10mm.
6. many muscle tension type anti-float anchor rod according to claim 5 is characterized in that: the spacing between the said locating rack (5) is 1500-2000mm.
7. according to any described many muscle tension type anti-float anchor rod of claim 1 to 6; It is characterized in that: said Grouting Pipe (7) is made up of first Grouting Pipe (2) and second Grouting Pipe (8), and said first Grouting Pipe (2) and the colligation of second Grouting Pipe (8) difference are on anchor rod body (3).
8. many muscle tension type anti-float anchor rod according to claim 7 is characterized in that: said first Grouting Pipe (2) and second Grouting Pipe (8) are plastic material structure.
9. many muscle tension type anti-float anchor rod according to claim 8 is characterized in that: the lower end grout outlet of said first Grouting Pipe (2) and second Grouting Pipe (8) is arranged on the position apart from hole (9) 300-500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205439233U CN202509532U (en) | 2011-12-22 | 2011-12-22 | Multi-rib tension type anti-floating anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205439233U CN202509532U (en) | 2011-12-22 | 2011-12-22 | Multi-rib tension type anti-floating anchor |
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| Publication Number | Publication Date |
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| CN202509532U true CN202509532U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205439233U Expired - Lifetime CN202509532U (en) | 2011-12-22 | 2011-12-22 | Multi-rib tension type anti-floating anchor |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205967A (en) * | 2013-03-14 | 2013-07-17 | 张强 | Anti-floating anchor rod structure of raft board |
| CN103528950A (en) * | 2013-10-31 | 2014-01-22 | 闫楠 | Method for testing bonding strength between anchor rod anchoring body and weathered rock mass |
| CN103669348A (en) * | 2013-12-31 | 2014-03-26 | 青建集团股份公司 | Anti-floating anchor locating device |
| CN104131560A (en) * | 2013-10-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Anti-floating anchor and construction method thereof |
| CN104929117A (en) * | 2015-06-26 | 2015-09-23 | 建研地基基础工程有限责任公司 | Concrete pole body composite anchor rod and construction method thereof |
| CN105178344A (en) * | 2015-06-12 | 2015-12-23 | 杭州江润科技有限公司 | Built-in anti-floating anchor blocking structure used in foundation mat for deep-well dewatering well and construction method |
| CN105756059A (en) * | 2016-04-29 | 2016-07-13 | 武汉建工集团股份有限公司 | Back anchor type anti-floating anchor and construction method |
| CN106193032A (en) * | 2016-08-23 | 2016-12-07 | 中国建筑第五工程局有限公司 | A kind of anti-float anchor rod construction method |
| CN109162273A (en) * | 2018-09-05 | 2019-01-08 | 江苏兴厦建设工程集团有限公司 | A kind of novel anchor rod stake |
| CN109898565A (en) * | 2019-03-18 | 2019-06-18 | 广西建工集团建筑工程总承包有限公司 | Utilize the construction method of anti-float anchor rod brace foundation gluten |
| CN110056015A (en) * | 2019-03-15 | 2019-07-26 | 中建一局集团第五建筑有限公司 | The reinforced anti-float anchor rod waterproofing node structure of female and its construction method |
| CN111501853A (en) * | 2020-04-15 | 2020-08-07 | 中国一冶集团有限公司 | Soil layer anti-floating anchor rod structure and construction method |
| CN115182394A (en) * | 2022-08-24 | 2022-10-14 | 深圳市华晟建设集团股份有限公司 | Soil anchor construction method capable of recycling steel sleeve |
| CN115506345A (en) * | 2022-09-02 | 2022-12-23 | 华北水利水电大学 | Retainer for concrete anchor and concrete anchoring assembly |
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2011
- 2011-12-22 CN CN2011205439233U patent/CN202509532U/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205967B (en) * | 2013-03-14 | 2015-02-25 | 中国建筑第八工程局有限公司 | Anti-floating anchor rod structure of raft board |
| CN103205967A (en) * | 2013-03-14 | 2013-07-17 | 张强 | Anti-floating anchor rod structure of raft board |
| CN104131560A (en) * | 2013-10-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Anti-floating anchor and construction method thereof |
| CN103528950A (en) * | 2013-10-31 | 2014-01-22 | 闫楠 | Method for testing bonding strength between anchor rod anchoring body and weathered rock mass |
| CN103528950B (en) * | 2013-10-31 | 2016-03-02 | 闫楠 | Bond strength testing method between a kind of anchorage body and weathered rock |
| CN103669348A (en) * | 2013-12-31 | 2014-03-26 | 青建集团股份公司 | Anti-floating anchor locating device |
| CN105178344A (en) * | 2015-06-12 | 2015-12-23 | 杭州江润科技有限公司 | Built-in anti-floating anchor blocking structure used in foundation mat for deep-well dewatering well and construction method |
| CN105178344B (en) * | 2015-06-12 | 2017-06-20 | 杭州江润科技有限公司 | The construction method of the built-in anti-float anchor rod plugging structure of sole plate precipitation of deep well |
| CN104929117A (en) * | 2015-06-26 | 2015-09-23 | 建研地基基础工程有限责任公司 | Concrete pole body composite anchor rod and construction method thereof |
| CN104929117B (en) * | 2015-06-26 | 2016-10-26 | 建研地基基础工程有限责任公司 | Construction method of concrete pole body composite anchor rod |
| CN105756059B (en) * | 2016-04-29 | 2017-11-03 | 武汉建工集团股份有限公司 | A kind of rear anchor formula anti-float anchor rod and construction method |
| CN105756059A (en) * | 2016-04-29 | 2016-07-13 | 武汉建工集团股份有限公司 | Back anchor type anti-floating anchor and construction method |
| CN106193032A (en) * | 2016-08-23 | 2016-12-07 | 中国建筑第五工程局有限公司 | A kind of anti-float anchor rod construction method |
| CN106193032B (en) * | 2016-08-23 | 2018-01-05 | 中国建筑第五工程局有限公司 | A kind of anti-float anchor rod construction method |
| CN109162273A (en) * | 2018-09-05 | 2019-01-08 | 江苏兴厦建设工程集团有限公司 | A kind of novel anchor rod stake |
| CN110056015A (en) * | 2019-03-15 | 2019-07-26 | 中建一局集团第五建筑有限公司 | The reinforced anti-float anchor rod waterproofing node structure of female and its construction method |
| CN109898565A (en) * | 2019-03-18 | 2019-06-18 | 广西建工集团建筑工程总承包有限公司 | Utilize the construction method of anti-float anchor rod brace foundation gluten |
| CN111501853A (en) * | 2020-04-15 | 2020-08-07 | 中国一冶集团有限公司 | Soil layer anti-floating anchor rod structure and construction method |
| CN115182394A (en) * | 2022-08-24 | 2022-10-14 | 深圳市华晟建设集团股份有限公司 | Soil anchor construction method capable of recycling steel sleeve |
| CN115506345A (en) * | 2022-09-02 | 2022-12-23 | 华北水利水电大学 | Retainer for concrete anchor and concrete anchoring assembly |
| CN115506345B (en) * | 2022-09-02 | 2023-10-20 | 华北水利水电大学 | Retainer for concrete anchor and concrete anchor assembly |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
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| CX01 | Expiry of patent term |