CN116263053A - Vacuum suction type anti-floating anchor rod - Google Patents
Vacuum suction type anti-floating anchor rod Download PDFInfo
- Publication number
- CN116263053A CN116263053A CN202111521037.5A CN202111521037A CN116263053A CN 116263053 A CN116263053 A CN 116263053A CN 202111521037 A CN202111521037 A CN 202111521037A CN 116263053 A CN116263053 A CN 116263053A
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- Prior art keywords
- steel cylinder
- steel
- finish rolling
- anchor
- rolling screw
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- 238000007667 floating Methods 0.000 title claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 159
- 239000010959 steel Substances 0.000 claims abstract description 159
- 238000005096 rolling process Methods 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 238000007569 slipcasting Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 abstract description 17
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 description 10
- 239000002689 soil Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of anti-floating anchors, and discloses a vacuum suction type anti-floating anchor, which aims to solve the problem that the upper end of an anchoring section is easy to shear and damage under the action of frictional resistance. The invention comprises a finish rolling screw thread steel, wherein the lower end of the finish rolling screw thread steel is connected with a steel cylinder, the outer diameter of the steel cylinder is larger than the outer diameter of the finish rolling screw thread steel, the upper end of the steel cylinder is provided with an air tap for vacuumizing the steel cylinder, the lower end of the steel cylinder is detachably connected with a sealing cover, the outer diameter of the sealing cover is larger than the outer diameter of the steel cylinder, a grouting body is poured between the finish rolling screw thread steel and the steel cylinder as well as an anchor hole, and the upper end of the finish rolling screw thread steel penetrates through the grouting body and is provided with an anchor backing plate and a nut. The invention can prevent the upper end of the anchoring section from shearing damage caused by friction resistance.
Description
Technical Field
The invention belongs to the technical field of anti-floating anchors, and particularly relates to a vacuum suction type anti-floating anchor.
Background
The anti-floating anchor rod is one kind of anti-floating measure for underground structure in building engineering, and is one structural member set to resist the upward displacement of building and has the opposite stress direction to the anti-floating pile.
The anti-floating anchor rod comprises a common anti-floating anchor rod and an enlarged head anti-floating anchor rod, and the structure schematic diagram of the common anti-floating anchor rod is shown in fig. 1; the grouting device comprises an anchor hole formed in a soil body (2), an anchor rod buried in the anchor hole and a grouting body (1) for filling the anchor hole and the anchor rod; the anchor rod comprises anchor rod reinforcing steel bars (4) and grouting pipes (3) surrounded by the anchor rod reinforcing steel bars (4), and a centering bracket (5) is arranged in the anchor hole for positioning conveniently, and the contact area of the anchor rod structure and the rock-soil body is small due to the fact that the diameters of the whole anchor holes are consistent, so that the binding force of the anchor rod structure and the rock-soil body is low; in order to increase the binding force between the anchor rod structure and the rock-soil body, a mode of increasing the length of the anchor rod is generally adopted; however, the stress concentration phenomenon exists in the anchor rod, so that the adhesive force is slightly increased after the anchor rod exceeds a certain length.
In order to improve the anti-floating capacity of the anti-floating anchor rod, an enlarged head anti-floating anchor rod appears, and the biggest difference between the enlarged head anti-floating anchor rod and the common anti-floating anchor rod is as follows: an enlarged head is arranged at the bottom of the anchor hole, and an enlarged head section is formed at the bottom of the anchor hole after pouring is completed, so that the anti-pulling capacity of the anti-floating anchor rod is improved. For example, a bottom-expanding prestress anti-floating anchor disclosed in patent application number 201220060959.0 comprises a metal corrugated pipe penetrating through a waterproof bottom plate, wherein the metal corrugated pipe extends into the lower end part of an anchor rod hole at the lower part of the waterproof bottom plate, and the lower end part of the anchor rod hole is a rod end expansion head; a steel sleeve is pre-buried outside the metal corrugated pipe in the waterproof bottom plate; steel strands penetrate through the metal corrugated pipe, the upper ends of the steel strands are fixed on the anchor, the lower ends of the steel strands are anchored on an anchor plate in the rod end expansion head, and the anchor plate is arranged on the anchor head; and a secondary grouting guide pipe is arranged between the metal corrugated pipe and the steel sleeve.
While the anchoring force of the anti-floating anchor plate increases with the increase in length of the anchoring section, when the length of the anchoring section exceeds a certain length (the anchoring force increases to a certain extent), the upper anchoring section is easily sheared and broken or slipped off by the friction force, and thus, the anchoring force of the anti-floating anchor cannot continue to increase. And, as time passes, anchor creep increases (i.e., anchor deformation increases over time).
Disclosure of Invention
The invention provides a vacuum suction type anti-floating anchor rod, which aims to solve the problem that the upper end of an anchoring section is easy to shear and break under the action of friction, can prevent the problem that the upper end of the anchoring section is sheared and broken due to friction, and can greatly improve the anchoring force of the anti-floating anchor rod compared with the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an anti-floating anchor of vacuum suction formula, includes the finish rolling screw-thread steel that is arranged in implanting in the anchor eye, its characterized in that, the lower extreme of finish rolling screw-thread steel is connected with the steel cylinder, the external diameter of steel cylinder is greater than the external diameter of finish rolling screw-thread steel, thereby the air cock that is used for carrying out the evacuation in the steel cylinder is installed to the upper end of steel cylinder makes the steel cylinder inside be the negative pressure chamber, the lower extreme of steel cylinder can be dismantled and be connected with sealed lid, the external diameter of sealed lid is greater than the external diameter of steel cylinder, pour the slip casting body between finish rolling screw-thread steel and steel cylinder and the anchor eye, the upper end of finish rolling screw-thread steel passes and extends the slip casting body and disposes the anchor backing plate, the finish rolling screw-thread steel passes the anchor backing plate and disposes the nut.
In some embodiments, the lower end of the steel cylinder is provided with an annular groove, a sealing ring is arranged on the side wall of the annular groove, and a bulge matched with the annular groove is arranged on the sealing cover.
In some embodiments, the lower end of the inner wall of the steel cylinder is provided with a plurality of hinge supports, each hinge support is rotatably connected with a first connecting rod, one end of the first connecting rod is connected with the hinge support, the other end of the first connecting rod is hinged with a second connecting rod, and the second connecting rod is connected with the hinge support on the sealing cover.
In some embodiments, the hinge supports at the lower end of the inner wall of the steel cylinder are uniformly distributed on the inner wall of the steel cylinder.
In some embodiments, the periphery of the steel cylinder is formed with a threaded ring.
Compared with the prior art, the invention has the following beneficial effects:
in the use process of the vacuum suction type anti-floating anchor rod, before the finish rolling threaded steel and the steel cylinder are placed into an anchor hole, firstly, the steel cylinder is vacuumized to enable the inside of the steel cylinder to be a negative pressure cavity, then the finish rolling threaded steel and the steel cylinder (comprising a sealing cover) are placed into the anchor hole together, cement mortar is poured between the finish rolling threaded steel and the steel cylinder and the anchor hole, a grouting body is formed after the cement mortar is solidified, when the grouting body is solidified to the designed strength, the backing plate and the nut apply prestress to the finish rolling threaded steel, when the prestress is applied to the finish rolling threaded steel, the finish rolling threaded steel drives the steel cylinder to move upwards for a certain distance together, but the outer diameter of the sealing cover of the steel cylinder is larger than the outer diameter of the steel cylinder, the acting force for pulling the sealing cover is larger than the acting force for pulling the finish rolling threaded steel and the steel cylinder, so that the sealing cover and the steel cylinder are in a sealing failure state, and the negative pressure cavity of the steel cylinder is opened, and the steel cylinder is adsorbed on the grouting body like a sucker. Therefore, the finish rolling screw steel, the steel cylinder and the grouting body form a whole under the action of friction resistance, and meanwhile, negative pressure is utilized to form the whole. Compared with the prior art, the grouting device can improve the binding tightness with the grouting body, simultaneously avoid the problem that the upper end grouting body (namely the upper end of the anchoring section) is sheared and damaged under the action of friction resistance, and greatly improve the anchoring force of the anti-floating anchor rod.
The steel cylinder and the outer diameter are larger than the outer diameter of the finish rolling deformed steel, and the deformation resistance of the steel cylinder can be far larger than the deformation resistance of the finish rolling deformed steel, so that the creep deformation of the whole anti-floating anchor rod can be greatly reduced, the anchoring force of the anti-floating anchor rod is improved, and the service life of the anti-floating anchor rod is prolonged.
The steel cylinder and the sealing cover are connected together through the first connecting rod and the second connecting rod, so that the steel cylinder and the sealing cover can be connected together to form a whole even after the sealing between the steel cylinder and the sealing cover fails.
Compared with the mode that finish rolling screw steel is directly connected with cement mortar in the prior art, the contact area between the finish rolling screw steel and the cement mortar (grouting body) can be increased, so that the integral connection performance between the finish rolling screw steel and the steel cylinder and the cement mortar (grouting body) is better, and the bearing capacity of the anti-floating anchor rod can be further improved.
Drawings
FIG. 1 is a schematic view of a conventional anti-floating anchor;
FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is an enlarged partial pictorial view at A in FIG. 3;
FIG. 5 is a schematic view of the structure of the seal between the steel cylinder and the seal cap after the prestress applied to the steel cylinder and the finish rolled deformed steel bar of the present invention;
FIG. 6 is an enlarged partial pictorial view at B in FIG. 5;
the marks in the figure: 1. grouting body 2, rock-soil body 3, grouting pipe 4, anchor bar reinforcing steel bar 5 and centering bracket;
01. anchor eye 02, finish rolling screw steel, 03, steel cylinder, 04, air cock, 05, sealing cover, 06, negative pressure cavity, 07, anchor backing plate, 08, nut, 09, annular groove, 010, bulge, 011, sealing ring, 012, hinged support, 013, first connecting rod, 014, second connecting rod.
Detailed Description
The present invention is further described below in conjunction with embodiments, which are merely some, but not all embodiments of the present invention. Based on the embodiments of the present invention, other embodiments that may be used by those of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
With reference to the accompanying drawings, the vacuum suction type anti-floating anchor comprises finish rolling screw thread steel 02 which is used for being implanted into an anchor hole 01, wherein the anchor hole 01 is opened in soil body through a drilling machine, and for the opening of the anchor hole 01, those skilled in the art can understand and understand the process and are not repeated here; the lower extreme of finish rolling screw steel 02 is connected with steel cylinder 03, the external diameter of steel cylinder 03 is greater than the external diameter of finish rolling screw steel 02, thereby the air cock 04 that is used for carrying out the evacuation in the steel cylinder is installed to the upper end of steel cylinder 03 makes the inside negative pressure chamber 06 that is of steel cylinder 03, the lower extreme of steel cylinder 03 can be dismantled and is connected with sealed lid 05, the external diameter of sealed lid 05 is greater than the external diameter of steel cylinder 03, pour slip casting body 1 between finish rolling screw steel 02 and steel cylinder 03 and the anchor eye 01, the upper end of finish rolling screw steel 02 passes and extends slip casting body 1 and to be furnished with anchor backing plate 07, finish rolling screw steel 02 passes anchor backing plate 07 and is furnished with nut 08, wherein, is used for applying prestressing force to finish rolling screw steel 02 through anchor backing plate 07 and nut 08.
Preferably, the upper end of the steel cylinder 02 is arc-shaped, so that the grouting body 1 can be prevented from being smoothly transited, and shearing damage caused by stress concentration and under the action of frictional resistance is prevented. Meanwhile, the top end of the steel cylinder is uniformly stressed, and friction resistance is transmitted to the steel cylinder gradually.
The upper end of the steel cylinder 02 is of a closed structure, and the lower end of the steel cylinder 02 passes through the sealing cover 05 so that a sealed negative pressure cavity 06 is formed in the steel cylinder 02. When the vacuum pumping treatment is carried out on the sealed cavity through the air tap 04, a negative pressure cavity 06 can be formed. After the negative pressure cavity 06 is formed, the sealing cover 05 can be stably adsorbed at the lower end of the steel cylinder 02 through negative pressure.
In some embodiments, the lower end of the steel cylinder 03 is provided with an annular groove 09, a sealing ring 011 is installed on the side wall of the annular groove 09, and a protrusion 010 mutually matched with the annular groove 09 is configured on the sealing cover 05. The sealing between the steel cylinder 03 and the sealing cover 05 is achieved by the design of the projection and the annular groove 09 and the sealing ring 011. Meanwhile, a certain static friction force is formed between the sealing cover and the steel cylinder, so that the sealing cover is prevented from falling off in the vibration process.
In some embodiments, a plurality of hinge seats 012 are mounted at the lower end of the inner wall of the steel cylinder 03, a first link 013 is rotatably connected to each hinge seat 012, one end of the first link 013 is connected to the hinge seat 012, a second link 014 is hinged to the other end of the first link 013, and the second link 014 is connected to the hinge seat 012 on the sealing cover 05. That is, the inner wall of the steel cylinder and the upper end face of the sealing cover 05 are both provided with the hinge seats 012, and the positions and the number of the hinge seats 012 on the sealing cover 05 are in one-to-one correspondence with the positions and the number of the hinge seats 012 on the inner wall of the steel cylinder. The steel cylinder and the sealing cover are connected together through the first connecting rod and the second connecting rod, so that the steel cylinder and the sealing cover can be connected together to form a whole even after the sealing between the steel cylinder and the sealing cover fails.
In some embodiments, the hinge seats 012 at the lower end of the inner wall of the steel cylinder 03 are uniformly distributed on the inner wall of the steel cylinder 03.
In some embodiments, the periphery of the steel cylinder 03 is formed with a thread ring, and by setting the thread ring, the contact area with the grouting body 1 can be increased, so that the connection tightness between the steel cylinder 03 and the grouting body 1 is improved.
In the use process of the vacuum suction type anti-floating anchor rod, before the finish rolling threaded steel and the steel cylinder are placed into an anchor hole, firstly, the steel cylinder is vacuumized to enable the inside of the steel cylinder to be a negative pressure cavity, then the finish rolling threaded steel and the steel cylinder (comprising a sealing cover) are placed into the anchor hole together, cement mortar is poured between the finish rolling threaded steel and the steel cylinder and the anchor hole, a grouting body is formed after the cement mortar is solidified, when the grouting body is solidified to the designed strength, the backing plate and the nut apply prestress to the finish rolling threaded steel, when the prestress is applied to the finish rolling threaded steel, the finish rolling threaded steel drives the steel cylinder to move upwards for a certain distance together, but the outer diameter of the sealing cover of the steel cylinder is larger than the outer diameter of the steel cylinder, the acting force for pulling the sealing cover is larger than the acting force for pulling the finish rolling threaded steel and the steel cylinder, so that the sealing cover and the steel cylinder are in a sealing failure state, and the negative pressure cavity of the steel cylinder is opened, and the steel cylinder is adsorbed on the grouting body like a sucker. Therefore, the finish rolling screw steel, the steel cylinder and the grouting body form a whole under the action of friction resistance, and meanwhile, negative pressure is utilized to form the whole. Compared with the prior art, the grouting device can improve the binding tightness with the grouting body, simultaneously avoid the problem that the upper end grouting body (namely the upper end of the anchoring section) is sheared and damaged under the action of friction resistance, and greatly improve the anchoring force of the anti-floating anchor rod.
The steel cylinder and the outer diameter are larger than the outer diameter of the finish rolling deformed steel, and the deformation resistance of the steel cylinder can be far larger than the deformation resistance of the finish rolling deformed steel, so that the creep deformation of the whole anti-floating anchor rod can be greatly reduced, the anchoring force of the anti-floating anchor rod is improved, and the service life of the anti-floating anchor rod is prolonged.
The steel cylinder and the sealing cover are connected together through the first connecting rod and the second connecting rod, so that the steel cylinder and the sealing cover can be connected together to form a whole even after the sealing between the steel cylinder and the sealing cover fails.
Compared with the mode that finish rolling screw steel is directly connected with cement mortar in the prior art, the contact area between the finish rolling screw steel and the cement mortar (grouting body) can be increased, so that the integral connection performance between the finish rolling screw steel and the steel cylinder and the cement mortar (grouting body) is better, and the bearing capacity of the anti-floating anchor rod can be further improved.
Claims (5)
1. The utility model provides an anti-floating anchor of vacuum suction formula, includes the finish rolling screw-thread steel that is arranged in implanting in the anchor eye, its characterized in that, the lower extreme of finish rolling screw-thread steel is connected with the steel cylinder, the external diameter of steel cylinder is greater than the external diameter of finish rolling screw-thread steel, thereby the air cock that is used for carrying out the evacuation in the steel cylinder is installed to the upper end of steel cylinder makes the steel cylinder inside be the negative pressure chamber, the lower extreme of steel cylinder can be dismantled and be connected with sealed lid, the external diameter of sealed lid is greater than the external diameter of steel cylinder, pour the slip casting body between finish rolling screw-thread steel and steel cylinder and the anchor eye, the upper end of finish rolling screw-thread steel passes and extends the slip casting body and disposes the anchor backing plate, the finish rolling screw-thread steel passes the anchor backing plate and disposes the nut.
2. The vacuum suction type anti-floating anchor according to claim 1, wherein the lower end of the steel cylinder is provided with an annular groove, a sealing ring is arranged on the side wall of the annular groove, and a bulge matched with the annular groove is arranged on the sealing cover.
3. A vacuum suction type anti-floating anchor according to claim 2, wherein a plurality of hinge supports are mounted at the lower end of the inner wall of the steel cylinder, a first connecting rod is rotatably connected to each hinge support, one end of the first connecting rod is connected with the hinge support, a second connecting rod is hinged to the other end of the first connecting rod, and the second connecting rod is connected with the hinge support on the sealing cover.
4. A vacuum suction type anti-floating anchor according to claim 3, wherein the hinge support at the lower end of the inner wall of the steel cylinder is uniformly distributed on the inner wall of the steel cylinder.
5. A vacuum suction type anti-floating bolt according to claim 1, wherein a thread ring is formed on the periphery of the steel cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521037.5A CN116263053B (en) | 2021-12-14 | 2021-12-14 | Vacuum suction type anti-floating anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521037.5A CN116263053B (en) | 2021-12-14 | 2021-12-14 | Vacuum suction type anti-floating anchor rod |
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| Publication Number | Publication Date |
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| CN116263053A true CN116263053A (en) | 2023-06-16 |
| CN116263053B CN116263053B (en) | 2024-06-18 |
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