CN114561942A - Anchoring structure with prestressed anchor rods arranged in staggered rubbing mode - Google Patents
Anchoring structure with prestressed anchor rods arranged in staggered rubbing mode Download PDFInfo
- Publication number
- CN114561942A CN114561942A CN202210245174.9A CN202210245174A CN114561942A CN 114561942 A CN114561942 A CN 114561942A CN 202210245174 A CN202210245174 A CN 202210245174A CN 114561942 A CN114561942 A CN 114561942A
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- Prior art keywords
- anchor
- section
- slurry
- sleeve
- free section
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- 238000004873 anchoring Methods 0.000 title claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 43
- 239000004519 grease Substances 0.000 claims description 9
- 230000001050 lubricating effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 6
- 210000001503 joint Anatomy 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of anchoring structures, and discloses an anchoring structure with prestressed anchor rods arranged in a staggered rubbing mode, which comprises an anchor hole, a plurality of anchor bars and an anchorage device, wherein each anchor bar is provided with an inner section and an outer section; the inner section comprises a bonding section and a free section; the anchor hole is filled with slurry, the slurry wraps the bonding section and the free section, the slurry is respectively bonded and fixed with the stratum and the bonding section, the outside of the free section is sleeved with an isolation layer, and the isolation layer is bonded and fixed with the slurry; the lengths of the isolation layers on the anchor bars are different and are arranged in a staggered twisting shape; the isolation layer is established through the free section cover at the dowel, and the length of the isolation layer on a plurality of dowels is the wrong form of rubbing with the hands and arranges, and the length of the free section of each dowel is also different, when carrying out the stretch-draw anchor, only need adopt a jack to anchor a plurality of dowels simultaneously, can not produce obvious tension difference or the deformation difference, and the stock after the stretch-draw anchor can obtain the same higher bearing capacity of tension dispersion type stock.
Description
Technical Field
The invention relates to the technical field of anchoring structures, in particular to an anchoring structure with prestressed anchor rods arranged in a staggered twisting mode.
Background
The anchoring structure of the prestressed anchor rod is widely applied to geotechnical engineering, and the principle of the anchoring structure of the common tension type prestressed anchor rod is as follows: the anchor rod consists of an anchor head, a free section and an anchoring section, wherein the anchoring section is filled with slurry, the slurry is bonded with the ground layer around the anchor hole to provide anchoring force, and meanwhile, the slurry is also bonded with the anchor rod to prevent the anchor rod from being pulled out of the slurry. The free section is free to elastically deform after being stressed, anchoring force is not provided, and the anchor head transmits the load (including prestress applied by jack tensioning, external load and the like) borne by the anchor rod to the free section and locks the prestress.
The prestressed anchor is generally composed of a plurality of anchor bars, and the free section, the anchoring section and the total length of each anchor bar are equal. The anchor rod with the structure is also called a tension concentration anchor rod, the shearing stress is concentrated at the junction of the free section and the anchoring section, and the adhesive is debonded and damaged after the shearing stress exceeds the adhesive strength of slurry and a stratum, so that the bearing capacity provided by the anchoring structure is relatively low, but the process is simple, and the application in engineering is most extensive.
At present, the tension dispersion type anchor rod is also widely applied to an anchoring structure, and the anchoring sections of the anchor bars of the tension dispersion type anchor rod are different in position, so that the problem of stress concentration does not exist, and a larger bearing capacity can be obtained. The principle is as follows: the same anchor rod is composed of a plurality of unit anchor bars, each unit anchor bar is provided with an independent free section and an independent anchoring section, but shares the same anchor head, the anchoring sections of the unit anchor bars are placed at different positions in the anchor hole and are not interfered with each other, the anchoring force is provided for the unit anchor bars independently, the anchoring section is generally not less than 6m in a rock stratum, and the anchoring section is generally not less than 10m in a soil layer.
In the prior art, when a tension dispersion type anchor rod is tensioned, a plurality of anchor bars need to be synchronously tensioned by a plurality of jacks so as to avoid tension difference or deformation difference caused by different lengths of free sections of the anchor bars when one jack is adopted for tensioning. Because each anchor bar needs respective anchor section, so the stock total length is longer to, when carrying out the stretch-draw, need adopt a plurality of jacks synchronous stretch-draw, construction process is complicated, and the requirement to equipment is higher.
Disclosure of Invention
The invention aims to provide an anchoring structure with prestressed anchor rods arranged in a staggered twisting mode, and aims to solve the problem that a plurality of anchor bars need to be synchronously tensioned by a plurality of jacks in the prior art.
The anchoring structure comprises an anchor hole formed in a building, a plurality of anchor bars arranged in the anchor hole in a penetrating manner, and an anchor device arranged outside the anchor hole and pressed on the building, wherein each anchor bar is provided with an inner section arranged in the anchor hole in a penetrating manner and an outer section penetrating through the anchor device and anchored with the anchor device; along the depth direction of the anchor hole, the inner section comprises a bonding section and a free section;
the anchor hole is filled with slurry, the slurry wraps the bonding section and the free section, the slurry is respectively bonded and fixed with the stratum and the bonding section, an isolation layer movably arranged with the free section is sleeved outside the free section, and the isolation layer is bonded and fixed with the slurry; the lengths of the isolation layers on the anchor bars are different and are arranged in a staggered twisting manner.
Further, the isolation layer is a sleeve pipe sleeved on the free section, a gap is formed between the inner side wall of the sleeve pipe and the outer side wall of the free section, and the outer side wall of the sleeve pipe is bonded and fixed with the slurry.
Further, the isolation layer is a lubricating grease layer wrapped on the free section, the inner side wall of the lubricating grease layer is wrapped on the outer side wall of the free section, and the outer side wall of the lubricating grease layer is fixedly bonded with the slurry.
Further, the top of the free section extends to the hole opening of the anchor hole, the bottom of the free section is in butt joint with the bonding section, and the free section and the bonding section are of an integral structure.
Further, along the sequence in which the anchor bars are arranged in sequence, the length of the isolation layer on the free section is uniformly increased in sequence or uniformly decreased in sequence.
Further, the anchorage device is provided with an inner side wall facing the hole opening of the anchor hole, and the top of the isolation layer extends to the hole opening of the anchor hole and is in butt joint with the inner side wall of the anchorage device.
Furthermore, an embedded groove which is sunken outwards is formed in the inner side wall of the anchor device, the top of the isolation layer is embedded into the embedded groove and is abutted to the top of the embedded groove, the outer side wall of the isolation layer is abutted to the inner side wall of the embedded groove, and the top of the isolation layer seals the embedded groove.
Furthermore, a plurality of strip-shaped notches are formed in the outer side wall of the sleeve and are arranged at intervals along the axial direction of the sleeve, and the slurry is filled into the notches and is bonded and fixed with the notches.
Further, along the direction of anchor eye depth, the middle part of cutting is the protruding bending inwards, a plurality of cutting along the circumference dislocation of sleeve pipe.
Furthermore, a plurality of fixing rings are sleeved outside the sleeve, and the fixing rings are arranged around the circumference of the sleeve in a closed manner and are fixedly connected with the sleeve; the slurry is fixedly bonded with fixing rings, and the fixing rings are arranged at intervals along the axial direction of the sleeve;
the fixing ring is provided with an upper ring surface arranged upwards and a lower ring surface arranged downwards, the upper ring surface is flat and is arranged perpendicular to the sleeve, and the lower ring surface is arranged obliquely upwards along the radial direction from inside to outside of the sleeve; the fixing ring is provided with a through hole, the through hole penetrates through the fixing ring from top to bottom, the through hole penetrates through the lower ring surface downwards, and the through hole penetrates through the upper ring surface upwards.
The above-mentioned prestressed anchorage pole mistake anchor structure of rubbing with hands formula and arranging that provides, establish the isolation layer through the free section cover at the dowel, and the activity is arranged between isolation layer and the free section, the length of the isolation layer on a plurality of dowels is the mistake and rubs with the hands the form and arranges, the length of the free section of each dowel is also different, when carrying out the stretch-draw anchor, only need adopt a jack to anchor a plurality of dowels simultaneously, can not produce obvious tension difference or deformation difference, its error can be in the acceptance range, and, the stock after the stretch-draw anchor can obtain the same higher bearing capacity of tension dispersion type stock.
Drawings
FIG. 1 is a schematic view of an internal structure of an anchoring structure with pre-stressed anchors arranged in a staggered twisting manner according to the present invention;
fig. 2 is a cross-sectional schematic view of the fit between the sleeve, the free section and the retaining ring provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to FIGS. 1-2, the following is a preferred embodiment of the present invention
The anchoring structure with the pre-stressed anchor rods arranged in a staggered twisting mode comprises an anchor hole formed in a building, a plurality of anchor bars and an anchorage device 101, wherein the anchor bars are arranged in the anchor hole in a penetrating mode, and the anchorage device 101 is arranged outside the anchor hole and is pressed on the building. The anchor bar is provided with an inner section which is arranged in the anchor hole in a penetrating way and an outer section 203 which penetrates the anchorage device 101 and is anchored with the anchorage device 101; along the depth direction of the anchor hole, the inner section comprises a bonding section 201 and a free section 202;
The above-mentioned prestressed anchorage pole mistake anchor structure of rubbing with hands formula and arranging that provides, establish the isolation layer through the free section 202 cover at the dowel, and the activity is arranged between isolation layer and the free section 202, the length of the isolation layer on a plurality of dowels is the mistake and rubs with the hands the form and arranges, the length of the free section 202 of each dowel is also different, when carrying out the stretch-draw anchor, only need adopt a jack to anchor a plurality of dowels simultaneously, can not produce obvious tension difference or deformation difference, its error can be in the acceptance range, and, the stock after the stretch-draw anchor can obtain the same higher bearing capacity of tension dispersion type stock.
The isolation layer is the sleeve 300 that the cover was established on free section 202, has the clearance between the inside wall of sleeve 300 and the outside wall of free section 202, and the outside wall of sleeve 300 bonds with thick liquid 100 and fixes, and like this, when carrying out the stretch-draw of dowel, free section 202 does not receive the restriction of sleeve 300, can freely stretch-draw.
Or the isolation layer is a lubricating grease layer wrapped on the free section 202, the inner side wall of the lubricating grease layer is wrapped on the outer side wall of the free section 202, and the outer side wall of the lubricating grease layer is fixedly bonded with the slurry 100.
The top of the free section 202 extends to the orifice of the anchor hole, the bottom of the free section 202 is in butt joint with the bonding section 201, and the free section 202 and the bonding section 201 are of an integral structure, so that the phenomenon of contact bonding between the free section 202 and the slurry 100 is avoided.
Along the sequence that a plurality of anchor bars are arranged in proper order, the length of the isolation layer on free section 202 evenly increases in proper order or evenly shortens in proper order, and generally, the length variation between free sections 202 is between 0.5 meter and 2 meters, and of course, according to the quantity of anchor bars, the length variation between free sections 202 also can suitably be adjusted.
The anchor 101 has an inner side wall facing the aperture of the anchor hole, and the top of the isolation layer extends to the aperture of the anchor hole and abuts against the inner side wall of the anchor 101, so that the isolation layer can be sleeved on the whole free section 202 to avoid contact between the free section 202 and the slurry 100.
In this embodiment, the inner sidewall of the anchor 101 is provided with an outwardly recessed inner groove, the top of the isolation layer is embedded in the inner groove and is abutted against the top of the inner groove, the outer sidewall of the isolation layer is abutted against the inner sidewall of the inner groove, and the inner groove is closed and arranged at the top of the isolation layer.
Because the slurry 100 is only filled to the hole opening of the anchor hole, and the isolation layer is embedded in the embedded groove of the inner side wall of the anchor 101, the slurry 100 can cross the embedded groove, and the slurry 100 is prevented from contacting the free section 202.
The outer side wall of the sleeve 300 is provided with a plurality of strip-shaped notches which are arranged at intervals along the axial direction of the sleeve 300, and the slurry 100 is filled into the notches and is bonded and fixed with the notches. Thus, by arranging the notches, the bonding between the outer sidewall of the sleeve 300 and the slurry 100 can be made more stable.
In this embodiment, the middle of the notch is curved to protrude inward along the depth direction of the anchor hole, and the notches are arranged in a staggered manner along the circumferential direction of the sleeve 300. Thus, after the slurry 100 is bonded and fixed with the outer side wall of the sleeve 300, the slurry 100 is embedded in the notch, and then when the anchor bars are tensioned, the free section 202 is tensioned and stretched, so that the sleeve 300 can be prevented from moving along with the free section 202.
A plurality of fixing rings 400 are sleeved outside the sleeve 300, and the fixing rings 400 are arranged around the circumference of the sleeve 300 in a closed manner and are fixedly connected with the sleeve 300; the slurry 100 is adhesively fixed to the fixing rings 400, and the plurality of fixing rings 400 are arranged at intervals along the axial direction of the sleeve 300; the fixing ring 400 has an upper ring surface 403 facing upward and a lower ring surface 402 facing downward, the upper ring surface 403 is flat and perpendicular to the sleeve 300, and the lower ring surface 402 is inclined upward along the radial direction from the inside to the outside of the sleeve 300; the fixing ring 400 is provided with a through hole 401, the through hole 401 vertically penetrates through the fixing ring 400, the through hole 401 downwardly penetrates through the lower ring surface 402, and the through hole 401 upwardly penetrates through the upper ring surface 403.
By fixedly providing a plurality of fixing rings 400 on the sleeve 300, the connection between the slurry 100 and the sleeve 300 can be more stable. The lower annulus 402 is flat to ensure the stability of the slurry 100 against downward retention, and to avoid movement or loosening of the sleeve 300 during tendon tensioning.
By providing the through-holes 401 in the fixing ring 400, the slurry 100 also passes through the through-holes 401, so that the entire fixing ring 400 forms an integral structure with the slurry 100.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The anchoring structure with the pre-stressed anchor rods arranged in a staggered twisting mode is characterized by comprising anchor holes formed in a construction object, a plurality of anchor bars arranged in the anchor holes in a penetrating mode and an anchorage device arranged outside the anchor holes and pressed on the construction object, wherein each anchor bar is provided with an inner section arranged in each anchor hole in a penetrating mode and an outer section penetrating through the anchorage device and anchored with the anchorage device; along the depth direction of the anchor hole, the inner section comprises a bonding section and a free section;
the anchor hole is filled with slurry, the slurry wraps the bonding section and the free section, the slurry is respectively bonded and fixed with the stratum and the bonding section, an isolation layer movably arranged with the free section is sleeved outside the free section, and the isolation layer is bonded and fixed with the slurry; the lengths of the isolation layers on the anchor bars are different and are arranged in a staggered twisting manner.
2. The anchoring structure of claim 1, wherein the isolation layer is a sleeve disposed on the free section, a gap is formed between an inner sidewall of the sleeve and an outer sidewall of the free section, and the outer sidewall of the sleeve is bonded and fixed to the slurry.
3. The anchoring structure of claim 1, wherein the isolation layer is a layer of lubricating grease coated on the free section, an inner sidewall of the layer of lubricating grease is coated on an outer sidewall of the free section, and the outer sidewall of the layer of lubricating grease is bonded and fixed with the slurry.
4. The anchoring structure of the pre-stressed anchor rod with the staggered twist type arrangement as claimed in any one of claims 1 to 3, wherein the top of the free section extends to the opening of the anchor hole, the bottom of the free section is butted with the bonding section, and the free section and the bonding section are of an integral structure.
5. The pre-stressed anchor rod staggered anchoring structure according to any one of claims 1 to 3, wherein along the sequence in which a plurality of said anchor rods are arranged in sequence, the length of the spacer layer on said free section is uniformly increased in sequence or decreased in sequence.
6. The anchoring structure with the pre-stressed anchor rods arranged in staggered twist mode as claimed in any one of claims 1 to 3, wherein the anchor has an inner side wall facing the opening of the anchor hole, and the top of the isolating layer extends to the opening of the anchor hole and abuts against the inner side wall of the anchor.
7. The anchoring structure of claim 7, wherein the anchoring structure has an inner side wall with an outwardly concave embedded groove, the top of the isolation layer is embedded in the embedded groove and abutted against the top of the embedded groove, the outer side wall of the isolation layer is abutted against the inner side wall of the embedded groove, and the top of the isolation layer closes the embedded groove.
8. The anchoring structure of claim 2, wherein the prestressed anchor rod is disposed in staggered manner, and a plurality of strip-shaped notches are formed in the outer side wall of the sleeve, and are spaced apart from each other in the axial direction of the sleeve, and the slurry is filled into the notches and is fixed to the notches by adhesion.
9. The anchoring structure of the pre-stressed anchor rod with the staggered rubbing type arrangement as claimed in claim 8, wherein the middle portion of the notches is curved convexly inward along the depth direction of the anchoring hole, and a plurality of the notches are staggered along the circumference of the sleeve.
10. The anchoring structure with staggered pre-stressed anchor rods according to claim 2, wherein the sleeve is sleeved with a plurality of fixing rings, the fixing rings are closely arranged around the circumference of the sleeve and fixedly connected with the sleeve; the slurry is fixedly bonded with fixing rings, and the fixing rings are arranged at intervals along the axial direction of the sleeve;
the fixing ring is provided with an upper ring surface arranged upwards and a lower ring surface arranged downwards, the upper ring surface is flat and is arranged perpendicular to the sleeve, and the lower ring surface is arranged obliquely upwards along the radial direction from inside to outside of the sleeve; the fixing ring is provided with a through hole, the through hole penetrates through the fixing ring from top to bottom, the through hole penetrates through the lower ring surface downwards, and the through hole penetrates through the upper ring surface upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245174.9A CN114561942A (en) | 2022-03-13 | 2022-03-13 | Anchoring structure with prestressed anchor rods arranged in staggered rubbing mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245174.9A CN114561942A (en) | 2022-03-13 | 2022-03-13 | Anchoring structure with prestressed anchor rods arranged in staggered rubbing mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114561942A true CN114561942A (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210245174.9A Pending CN114561942A (en) | 2022-03-13 | 2022-03-13 | Anchoring structure with prestressed anchor rods arranged in staggered rubbing mode |
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| CN (1) | CN114561942A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223518A (en) * | 1988-08-25 | 1990-04-11 | Gkn Colcrete Limited | Ground anchorage |
| CN1319152A (en) * | 1998-08-06 | 2001-10-24 | 安东尼·唐纳德·巴利 | Ground anchorage |
| CN201272968Y (en) * | 2008-09-25 | 2009-07-15 | 中国京冶工程技术有限公司 | Combined anchorage system |
| CN202227340U (en) * | 2011-07-12 | 2012-05-23 | 曾庆义 | Device capable of being arranged on anchor rod anchoring section and/or rod body of free section and anchor rod |
| CN203654280U (en) * | 2013-12-23 | 2014-06-18 | 中国建筑西南勘察设计研究院有限公司 | Pressure dispersion type anti-pulling anchor rod |
| CN212641529U (en) * | 2020-06-04 | 2021-03-02 | 中冶成都勘察研究总院有限公司 | Anti-crack prestressed enlarged footing anti-floating anchor rod and anti-crack prestressed anti-floating anchor rod |
-
2022
- 2022-03-13 CN CN202210245174.9A patent/CN114561942A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223518A (en) * | 1988-08-25 | 1990-04-11 | Gkn Colcrete Limited | Ground anchorage |
| CN1319152A (en) * | 1998-08-06 | 2001-10-24 | 安东尼·唐纳德·巴利 | Ground anchorage |
| CN201272968Y (en) * | 2008-09-25 | 2009-07-15 | 中国京冶工程技术有限公司 | Combined anchorage system |
| CN202227340U (en) * | 2011-07-12 | 2012-05-23 | 曾庆义 | Device capable of being arranged on anchor rod anchoring section and/or rod body of free section and anchor rod |
| CN203654280U (en) * | 2013-12-23 | 2014-06-18 | 中国建筑西南勘察设计研究院有限公司 | Pressure dispersion type anti-pulling anchor rod |
| CN212641529U (en) * | 2020-06-04 | 2021-03-02 | 中冶成都勘察研究总院有限公司 | Anti-crack prestressed enlarged footing anti-floating anchor rod and anti-crack prestressed anti-floating anchor rod |
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