CN203307803U - Pre-stress pressure type anti-floating anchor rod with spiral stirrup - Google Patents
Pre-stress pressure type anti-floating anchor rod with spiral stirrup Download PDFInfo
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- CN203307803U CN203307803U CN2013203189035U CN201320318903U CN203307803U CN 203307803 U CN203307803 U CN 203307803U CN 2013203189035 U CN2013203189035 U CN 2013203189035U CN 201320318903 U CN201320318903 U CN 201320318903U CN 203307803 U CN203307803 U CN 203307803U
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- spiral stirrup
- anchoring
- anchor rod
- steel plate
- anchor
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Abstract
The utility model relates to a pre-stress pressure type anti-floating anchor rod with a spiral stirrup. The anchor rod comprises an anchor head, a free section and an anchoring section, wherein the free section is a reinforcing bar body or an unbonded steel stranded wire, a corrugated pipe is sleeved on the outer surface of the reinforcing bar body or the unbonded steel stranded wire, the spiral stirrup is arranged outside the corrugated pipe, and cement slurry or cement mortar is filled between the corrugated pipe and an anchoring hole to wrap the spiral stirrup so as to form an anchoring body; the anchoring section is arranged on one end where the free section extends into the anchoring hole, the anchoring section comprises a bearing plate and an anchor device, wherein the bearing plate is abutted with one end of the spiral stirrup, and the anchoring section is anchored outside the bearing plate through the anchor device; the anchoring head is arranged on the other end of the free section, the anchoring head comprises a locking device and a steel plate, wherein the steel plate is abutted with the other end of the spiral stirrup, after pre-stress is stretched and drawn, the steel reinforcing bar body of the free section is locked through the locking device outside the steel plate, and the steel plate covers the waterproof layer of the structure, so that the pre-stress exists before the anchoring body is used for bearing. By adopting the anti-floating anchor rod, the problems of cracks and water seepage are effectively solved.
Description
Technical field
The utility model relates to a kind of type of prestressed pressure with spiral stirrup anti-float anchor rod, belongs to building underground structure anti-float anchor rod field.
Background technology
For Anchorage Technology, its application and research has had the history of more than 100 year.Its application has also expanded to many territories, as mining, strengthening coal mine tunnel, and pattern foundation pit supporting structure and tunnel support etc.Since nearly 2 years, along with the raising of urban underground space utilization rate, embedded depth of foundation is more and more darker, and particularly the degree of depth of basis immersion underground water is increasing, and it is also increasing that the probability that pulls out load is born in building foundation.In actual engineering, in order to meet the condition of basic stress balance, some major measure that adopt at present have structure weightening finish method, fall the measure of section drainage, uplift pile method and anti-float anchor rod method etc.Yet still there are many defects in actual applications in these measures.Can to be underground structure reach the balance with buoyancy by the weight that increases self to structure weightening finish method, this kind measure process economics cost is also relatively low, but generally can only use the situation that groundwater table is lower, not too applicable for present tall and big dark underground anti-floating situation.Fall and cut a drainage and generally also can only use the construction requirement of short-term, just not too applicable for long-term requirement, and long-term groundwater abstraction, for the safety of peripheral adjacent building, be also influential.The extensive point of scope of application meeting of this measure of uplift pile, but its cost is high, and requiring of construction is high, and the structure base slab discontinuity.Compare, anti-float anchor rod is wherein most widely used a kind of measure of anti float.Because this technique cost is low, the duration is short, easy construction, the most important thing is the advantages such as the sole plate distribution of force is comparatively even, so application is comparatively extensive.But during use, after the endurance issues of anti-float anchor rod and anti-float anchor rod anchoring, structure percolation-proof problem is a puzzlement researcher and engineers and technicians' a difficult problem always.For example, its range of application of total length bonding anti-float anchor rod is very widely, but due to anchoring body and the downward frictional resistance effect of Rock And Soil on every side, make in anchoring body and produced tensile stress, when tensile stress surpasses the tension ultimate stress of anchoring body, crack will be produced, and can expansion can be continued along with the time crack.When crack arrived the position of reinforcing bar, underground water will infiltrate, and then corrosion reinforcing bar, has influence on ultimate bearing capacity and the durability of anchor pole.Therefore generally, the endurance issues of total length bonding anti-float anchor rod one " time bomb " being equivalent to bury.And for the load transfer mechanism of anti-float anchor rod, many scholars conduct in-depth research, as Phillips supposition frictional resistance, distribute by power function along anchorage length, provided the relevant parameter that is applicable to rock bolt.But up to the present, in the existing technical standard of country or industry, the design of anti-float anchor rod etc. is planless regulation still, and fail to provide and design relevant anchor pole construction measure.In actual engineering design, even if same engineering, if designed by different personnel, also can obtain different design results.In actual the examination, we also still adopt the method for field trial to carry out inspection of quality and sampling observation to anchor pole.
The utility model content
The utility model is for the deficiency of above-mentioned non-prestressed total length bonding tension type anti-float anchor rod, a kind of type of prestressed pressure with spiral stirrup anti-float anchor rod has been proposed, it is on the basis of non-prestressed total length bonding tension type anti-float anchor rod power transmission principle, the compressive pre-stress effect of being arranged to the total length free segment and applying in advance fair-sized to anchoring body by put bellows at the body of rod, and adopt the measure that configures spiral stirrup, improve the endurance quality of anti-float anchor rod; The construction measure position of anchor head is arranged on waterproofing course in addition solves structure base slab percolation-proof problem.
The technical solution adopted in the utility model is specific as follows:
A kind of type of prestressed pressure with spiral stirrup anti-float anchor rod, it is characterized in that: described anti-float anchor rod comprises anchor head, free segment and anchoring section, wherein, described free segment is the reinforcing bar body of rod or a non-bending steel cable, the outer surface cover of the described reinforcing bar body of rod or non-bending steel cable has bellows, bellows outside is provided with spiral stirrup, between described bellows and anchor hole, is filled with cement paste or cement mortar, thereby it wraps spiral stirrup and forms an anchoring body; Described anchoring section is arranged at free segment and stretches into the end in anchor hole, and it comprises bearing plate and ground tackle, and described bearing plate props up spiral stirrup one end, and by ground tackle anchoring outside bearing plate; Described anchor head is arranged at the free segment other end, comprise lockset and steel plate, described steel plate is also a bearing plate, it props up the other end of spiral stirrup, the described free segment reinforcing bar body of rod or non-bending steel cable are locked by the lockset in the steel plate outside, and described sheet-steel cover is on the waterproofing course of structure, and described anchoring body has compressive pre-stress.
Further, described freedom length is the length of anchoring body;
Further, between the lockset of described anchor head and steel plate, be provided with the rubber waterproof sealing mat, or be wound with the polytetrafluoroethylene (PTFE) material strip on the screw thread of lockset.
Further, the described reinforcing bar body of rod or non-bending steel cable stretch out anchor head outward and bend and be arranged in structure base slab.
Further, under described structure base slab, comprise successively waterproofing course, 100mm concrete cushion and soil layer.
Further, described anchor hole passes waterproofing course, 100mm concrete cushion and soil layer successively.
Further, in described free segment bellows, be marked with grease.
The utility model is after anti-float anchor rod anchoring body intensity reaches before anti-float anchor rod carrying, anti-float anchor rod is carried out to prestressed stretch-draw in advance, and by prestressing force, the concrete ground tackle is locked, make before the anchoring body carrying and wherein just have compressive pre-stress, in the whole bearing capacity process of anti-float anchor rod, all only has compressive stress in anchoring body so always, be in pressured state, guaranteed that concrete can not produce because of tension crack, well solve the problem of the durability of total length Grouted bolt, but also can give full play to the ultimate bearing capacity of anti-float anchor rod.We increase the steel plate that thickness is suitable by anchor head in addition, and this bearing plate is covered on waterproofing course, when we apply the waterproofing course below can pushing down of bearing plate prestressed the time to anti-float anchor rod, so just can solve the problem of structure base slab percolation-proof.In addition from construction measure, valve rubber that property sealing together is good can be set between the lockset of anchor head and steel plate and before the lockset locking first on screw thread with several circles on polytetrafluoroethylene (PTFE) material strip volume and then lockset is locked.
In prestressed pressure type anti-float anchor rod, configure spiral stirrup, can effectively improve the value of thrust in the anchor pole stretching process, thereby greatly improve the compressive pre-stress value in anchoring body, this kind anti-float anchor rod is applied in phreatic high and the darker underground structure anti-floating of buried depth in a wider context.
Band spiral stirrup prestressed pressure type anti-float anchor rod spy on tension type anti-float anchor rod power transmission principle, the crack developing that effectively limits anchor pole anchoring body in load bearing process by prestressed anchor and the such application of force of spiral stirrup and constraint acting in conjunction; By steel plate being set at anchor head and anchor head being divided and is arranged on waterproofing course the seepage problem that solves structure base slab.
Beneficial effect
Prestressed pressure with spiral stirrup type anti-float anchor rod of the present utility model is on the basis of tension type anti-float anchor rod power transmission principle, apply in advance the compressive pre-stress effect of fair-sized for anchoring body, and by the measure of the outside of the body of rod at anchoring body configuration spiral stirrup, the initial stress that has had a certain size before anchoring body is carried, supporting capacity improves, crack and anti-float anchor rod excellent in durability do not appear in anchoring body substantially, in addition, by at anchor head, setting up a block plate and anchor head being divided and is arranged on waterproofing course, can effectively solve the problem of the percolation-proof of structure base slab, be applicable to the groundwater condition needs of various water levels.
The accompanying drawing explanation
Fig. 1 type of the prestressed pressure with spiral stirrup of the present utility model anti-float anchor rod functional schematic;
Fig. 2 type of the prestressed pressure with spiral stirrup of the present utility model anti-floating anchor rod structure schematic diagram of structure;
Fig. 3 is that the anchor head functional configuration of Fig. 2 amplifies organigram, and it divides and a block plate is set and anchor head is divided and is arranged on waterproofing course in anchor head.
Wherein, 1-structure base slab; 2-waterproofing course; 3-100mm concrete cushion; 4-soil layer; 5-with the prestressed pressure type anti-float anchor rod of spiral stirrup; 6-reinforcing bar body of rod; 7-lockset; 8-spiral stirrup; 9-ground tackle; 10-steel plate; 11-bellows; 12-rubber waterproof sealing mat.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing 1-3.
As described in Fig. 1-3, a kind of type of prestressed pressure with spiral stirrup anti-float anchor rod 5 of the present utility model, comprise anchor head, free segment and anchoring section, wherein, free segment is a reinforcing bar body of rod 6, its outer surface cover has bellows 11, in free segment bellows 11, be marked with grease, bellows 11 outsides are provided with spiral stirrup 8, between bellows 11 and anchor hole, are filled with cement paste or cement mortar, thereby it wraps spiral stirrup 8 and forms an anchoring body, freedom length is the length of anchoring body; Anchoring section is arranged at free segment and stretches into the end in anchor hole, and it comprises bearing plate and ground tackle 9, and bearing plate props up spiral stirrup 8 one ends, and by ground tackle 9 anchoring outside bearing plate; Anchor head is arranged at the free segment other end, comprise lockset 7 and steel plate 10, steel plate 10 is also a bearing plate, it props up the other end of spiral stirrup 8, lockset 7 by steel plate 10 outsides after the free segment reinforcing bar body of rod 6 prestressed stretch-draws is locked, and steel plate 10 covers on the waterproofing course 2 of structure, makes anchoring body have compressive pre-stress; The reinforcing bar body of rod 6 stretches out the outer also bending of anchor head and is arranged in structure base slab 1.Structure base slab comprises waterproofing course 2,100mm concrete cushion 3 and soil layer 4 for 1 time successively, and anchor hole passes waterproofing course 2,100mm concrete cushion 3 and soil layer 4 successively.Wherein, in order to play the effect of water-tight, between the lockset 7 of anchor head and steel plate 10, also be provided with rubber waterproof sealing mat 12, perhaps on the screw thread of lockset 7, be wound with the polytetrafluoroethylene (PTFE) material strip, can before the lockset locking, first on screw thread, rolling up several circles with the polytetrafluoroethylene (PTFE) material strip and then lockset is locked.
Perhaps the reinforcing bar body of rod 6 in above-mentioned free segment can be replaced with to non-bending steel cable.
Be more than an exemplary embodiments of the present utility model, enforcement of the present utility model is not limited to this.
Claims (7)
1. the type of the prestressed pressure with a spiral stirrup anti-float anchor rod (5), it is characterized in that: described anti-float anchor rod comprises anchor head, free segment and anchoring section, wherein, described free segment is the reinforcing bar body of rod (6) or a non-bending steel cable, the outer surface cover of the described reinforcing bar body of rod (6) or non-bending steel cable has bellows (11), bellows (11) outside is provided with spiral stirrup (8), between described bellows (11) and anchor hole, be filled with cement paste or cement mortar, it wraps spiral stirrup (8) thereby forms an anchoring body; Described anchoring section is arranged at free segment and stretches into the end in anchor hole, and it comprises bearing plate and ground tackle (9), and described bearing plate props up spiral stirrup (8) one ends, and by ground tackle (9) anchoring outside bearing plate; Described anchor head is arranged at the free segment other end, comprise lockset (7) and steel plate (10), described steel plate (10) is also a bearing plate, it props up the other end of spiral stirrup (8), the described free segment reinforcing bar body of rod (6) or non-bending steel cable are locked by the lockset (7) in steel plate (10) outside, and the waterproofing course (2) that described steel plate (10) covers in structure is upper, and described anchoring body has compressive pre-stress.
2. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 1 (5), it is characterized in that: described freedom length is the length of anchoring body.
3. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 1 (5), it is characterized in that: between the lockset of described anchor head (7) and steel plate (10), be provided with rubber waterproof sealing mat (12), or on the screw thread of lockset (7), be wound with the polytetrafluoroethylene (PTFE) material strip.
4. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 1 (5) is characterized in that: the described reinforcing bar body of rod (6) or non-bending steel cable stretch out the outer and bending of anchor head and are arranged in structure base slab (1).
5. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 4 (5), is characterized in that: under described structure base slab (1), comprise successively waterproofing course (2), 100mm concrete cushion (3) and soil layer (4).
6. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 5 (5), it is characterized in that: described anchor hole passes waterproofing course (2), 100mm concrete cushion (3) and soil layer (4) successively.
7. the type of the prestressed pressure with spiral stirrup anti-float anchor rod according to claim 1 (5), is characterized in that: be marked with grease in described free segment bellows (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203189035U CN203307803U (en) | 2013-06-04 | 2013-06-04 | Pre-stress pressure type anti-floating anchor rod with spiral stirrup |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203189035U CN203307803U (en) | 2013-06-04 | 2013-06-04 | Pre-stress pressure type anti-floating anchor rod with spiral stirrup |
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| CN203307803U true CN203307803U (en) | 2013-11-27 |
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| CN2013203189035U Expired - Fee Related CN203307803U (en) | 2013-06-04 | 2013-06-04 | Pre-stress pressure type anti-floating anchor rod with spiral stirrup |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290843A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Pre-stressed pressure-type anti-floating anchor with spiral stirrup |
| CN104631454A (en) * | 2015-01-29 | 2015-05-20 | 山东大学 | Inverted wedge type recoverable anchor rod |
| CN105064359A (en) * | 2015-07-18 | 2015-11-18 | 高路恒 | Unbonded prestressed construction anchor rod |
| CN105887795A (en) * | 2016-06-07 | 2016-08-24 | 浙江大学 | Abutment back soft soil foundation gradual-change pile length counterforce loading prepressing method |
| CN108104121A (en) * | 2018-01-11 | 2018-06-01 | 中冶集团武汉勘察研究院有限公司 | For improving the structure and method of pressure anchor wire cement grout body compression strength |
| CN108468356A (en) * | 2018-04-08 | 2018-08-31 | 安徽省建筑科学研究设计院 | A kind of anti-float anchor rod and preparation method thereof that existing basement bottom board is reinforced |
| CN110409439A (en) * | 2019-07-24 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of novel anti-float anchor rod and its construction method |
-
2013
- 2013-06-04 CN CN2013203189035U patent/CN203307803U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290843A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Pre-stressed pressure-type anti-floating anchor with spiral stirrup |
| CN104631454A (en) * | 2015-01-29 | 2015-05-20 | 山东大学 | Inverted wedge type recoverable anchor rod |
| CN104631454B (en) * | 2015-01-29 | 2016-11-30 | 山东大学 | A kind of reverse wedge formula recoverable anchor rod |
| CN105064359A (en) * | 2015-07-18 | 2015-11-18 | 高路恒 | Unbonded prestressed construction anchor rod |
| CN105887795A (en) * | 2016-06-07 | 2016-08-24 | 浙江大学 | Abutment back soft soil foundation gradual-change pile length counterforce loading prepressing method |
| CN105887795B (en) * | 2016-06-07 | 2018-05-01 | 浙江大学 | The long counter-force loading preloading method of Abutment Back soft soil foundation gradual change stake |
| CN108104121A (en) * | 2018-01-11 | 2018-06-01 | 中冶集团武汉勘察研究院有限公司 | For improving the structure and method of pressure anchor wire cement grout body compression strength |
| CN108104121B (en) * | 2018-01-11 | 2023-08-15 | 中冶集团武汉勘察研究院有限公司 | Structure and method for improving compressive strength of pressure type anchor cable cement grouting body |
| CN108468356A (en) * | 2018-04-08 | 2018-08-31 | 安徽省建筑科学研究设计院 | A kind of anti-float anchor rod and preparation method thereof that existing basement bottom board is reinforced |
| CN108468356B (en) * | 2018-04-08 | 2024-04-12 | 安徽省建筑科学研究设计院 | Anti-floating anchor rod for reinforcing existing basement bottom plate and preparation method thereof |
| CN110409439A (en) * | 2019-07-24 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of novel anti-float anchor rod and its construction method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20140604 |