CN114541381A - Anticorrosive impervious subsides formula anchor backing plate - Google Patents
Anticorrosive impervious subsides formula anchor backing plate Download PDFInfo
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- CN114541381A CN114541381A CN202210092313.9A CN202210092313A CN114541381A CN 114541381 A CN114541381 A CN 114541381A CN 202210092313 A CN202210092313 A CN 202210092313A CN 114541381 A CN114541381 A CN 114541381A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000004873 anchoring Methods 0.000 claims abstract description 17
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 73
- 238000005260 corrosion Methods 0.000 claims description 24
- 230000007797 corrosion Effects 0.000 claims description 14
- 230000003487 anti-permeability effect Effects 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 2
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- 238000004062 sedimentation Methods 0.000 abstract description 26
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- 239000002131 composite material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 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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- 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
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- 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
- E02D31/02—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 ground humidity or ground water
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- Structural Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an anticorrosive and impervious sedimentation type anchor backing plate which can be applied to an anticorrosive and impervious anchor rod structure for buildings, wherein the anchor rod structure comprises a plurality of steel strands arranged in an anchor rod hole, a tensioning end anchor assembly arranged at one end of the plurality of steel strands, a front anchoring bearing body assembly arranged at the other end of the plurality of steel strands, and a combined water stop steel plate assembly or a water stop steel ring assembly arranged close to the tensioning end anchor assembly, wherein one end of the anchor rod hole comprises a cushion layer, a bottom plate and a surface layer from bottom to top, and the sedimentation type anchor backing plate is contained in the tensioning end anchor assembly; subside formula anchor backing plate is bowl form structure, and bowl form structure's bottom inlays to be established in the bottom plate, and bowl form structure's top surface and the top surface parallel and level of bottom plate have the accommodation space in the opening, and the accommodation space is used for installing the stretch-draw anchor of stretch-draw end anchor subassembly, and the one end of many steel strands is locked on the stretch-draw anchor through a plurality of work clamping pieces admittedly. Therefore, the problem of upward seepage of underground foundation water along the steel strand can be well solved.
Description
Technical Field
The invention relates to an anticorrosive and impervious sedimentation type anchor backing plate.
Background
With the fact that the world economy of the twenty-first century enters a high-speed development stage, particularly the development speed of the Chinese economy is more global leading, the national foundation construction is also improved in mechanism and technological innovation, the country draws the coming of the era of promoting the development of infrastructure, and the pressure type prestressed anti-floating anchor rod has established the important position in the field of building foundation engineering from the aspects of research, development, production, application and the like. The traditional anti-floating anchor rod is composed of a pressure type and a tension type, a base material adopts common deformed steel bar or finish-rolled deformed steel bar, and a steel strand is also adopted. Because the use standard of the prior anti-floating anchor rod is low, the corresponding defects are gradually exposed, such as: the shear fracture, dislocation, cracking, leakage and other safety accidents of the bearing beam of the building foundation caused by low anchoring pull-out resistance, poor anti-interference stability, weak anti-corrosion and anti-permeability performance and the like. Based on the technical requirements, the China departs from JGJ476-2019 'construction engineering anti-floating technical standard', wherein the design of the anchor rod provides corresponding requirements, and the technical requirements are made on the anti-pulling anchoring force, the length, the corrosion resistance and the impermeability of the anchoring anti-pulling force of different types of anti-floating anchor rods in different stratums.
Based on the huge demand of anti-floating anchor rod in the market, simultaneously belongs to the prestressing force technical category again, its main research and development content and key technology direction are as follows:
1. the anchoring withdrawal resistance and the anti-interference stability of the prestressed anchor rod anchoring body are improved: the anchor rod is characterized in that the most common and stable anchoring mode in the prestressed anchoring technology is adopted in the main structure design of the anchor rod, namely an extrusion sleeve is matched with an extrusion spring to be in a high-pressure extrusion occlusion mode, a rod body base material adopts UPS-15.2-1860-JG/T161-2016 unbonded steel stranded wires, and the anchoring performance of anchoring in an extrusion mode under the condition of not considering the concrete strength of a pile body meets the requirement of being more than or equal to 95% in GB/T14370-2015 and is far more than 2 times of the strength required by the anchor rod design. The non-adhesive steel strand is adopted, and under a stress structure, the anchoring anti-pulling force is large, the anti-interference stability is good, and meanwhile, the anti-corrosion problem of the bus is solved.
2. The problem of underground foundation water leakage through the anchor rod structure body or the crack of the joint of the concrete and the structure body is solved: the term 7.5.10 in the JGJ476-2019 standard has different requirements on the waterproof grade of the connecting part of the anchor rod and the underground basic structure, and three parts for forming leakage in the anchor rod structure:
1) the fixed end is the most important leakage point, because the outer protective layer (plastic sheath) of the steel strand needs to be removed at the extrusion meshing part of the extrusion sleeve and the steel strand, an exposed leakage point is formed at the end part, and underground water can seep from the twisted joint of the steel strand at the end part and the outer surface of the steel strand.
2) The second leak point is the junction of stock upper portion and building foundation position raft board or bottom plate, in the structural pattern promptly "stagnant water steel sheet position", the leak point of here mainly produces in the department that does not have bonding steel strand wires and pile body concrete, the mode of seepage is: the underground foundation water upwelles along the crack between the unbonded steel strand plastic outer sleeve and the concrete through corresponding water pressure.
3) The third seepage position is on the top of the anchor rod: the anchor backing plate is similar with the anchor position of ground tackle steel strand wires, and the top layer sheath need be got rid of because of the anchor needs equally to the outer plastic layer of unbonded steel strand wires similar, the anchor junction, consequently the leak source appears in this connecting portion.
In order to meet the requirement of the bolt anti-corrosion design in item 7.5.9 in the JGJ476-2019 standard, a design scheme of comprehensively considering leakage and corrosion resistance compatibility becomes a technical key when the bolt is initially designed and planned.
After the design structure shown in fig. 1 is adopted for construction, a large number of anti-floating anchor rod piles are found to have underground foundation water seeping upwards along the steel strand after the bottom plate is concreted, and the reasons are as follows:
1. the anti-floating anchor rod is characterized in that a main parent material (an unbonded steel strand) of the anti-floating anchor rod is a surface PE protective pipe which is damaged in the construction process, underground foundation water can penetrate into a damaged opening of the unbonded steel strand through a pile foundation concrete crack and then seep upwards from a gap generated by twisting the steel strand;
2. the parent metal (the unbonded steel strand) is smooth in the outer surface of the surface PE protective pipe, and poor in the adhesion degree with concrete, so that gaps are caused, and underground foundation water can permeate upwards along the gaps.
According to the design structure shown in figure 1, the installation position of an anchor backing plate (steel plate) is combined with the upper plane of a surface layer lower bottom plate, the height of an anchorage device is 50mm, a working clamping piece and a steel strand are additionally arranged, the total height of 20mm is left after tensioning and locking, the total height is 70mm, the total height of surface layer concrete pouring is 100mm, and therefore the water stop thickness of the upper portion of the anchor rod is only 30mm, and the problem of water seepage of underground foundations cannot be solved.
The surface course is the direct surface course that uses of stratum underground promptly, in case the infiltration can directly influence the use of stratum underground, 30 mm's infiltration thickness brings considerable degree of difficulty for the stagnant water construction in later stage simultaneously.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an anticorrosive and impervious sedimentation type anchor backing plate which can well solve the problem of upward seepage of underground foundation water of an anti-floating anchor pile along a steel strand.
In order to achieve the purpose, the invention provides an anticorrosive and impervious sedimentation type anchor backing plate which can be applied to an anticorrosive and impervious anchor rod structure for buildings, wherein the anchor rod structure comprises a plurality of steel strands arranged in an anchor rod hole, a tensioning end anchor assembly arranged at one end of the steel strands, a preposed anchor bearing body assembly arranged at the other end of the steel strands, and a combined type water stop steel plate assembly or a water stop steel ring assembly arranged close to the tensioning end anchor assembly, one end of the anchor rod hole comprises a cushion layer, a bottom plate and a surface layer from bottom to top, and the sedimentation type anchor backing plate is contained in the tensioning end anchor assembly; subside formula anchor backing plate is bowl form structure, and bowl form structure's bottom inlays to be established in the bottom plate, and bowl form structure's top surface and the top surface parallel and level of bottom plate have the accommodation space in the opening, and the accommodation space is used for installing the stretch-draw anchor of stretch-draw end anchor subassembly, and the one end of many steel strands is locked on the stretch-draw anchor through a plurality of work clamping pieces admittedly.
In a preferred embodiment, the sedimentation type anchor backing plate comprises a bowl edge part, a bowl body part, a bowl bottom part, a sealing surface, a plurality of wire through holes and a plurality of thread counter bores; the bowl edge part is of a circular ring-shaped structure; the bowl body part is of a cylindrical structure, one end of the bowl body part is hermetically connected with the inner opening of the bowl edge part, and an accommodating space is formed inside the bowl body part; the bottom of the bowl is in a disc-shaped structure and is hermetically connected with the other end of the bowl body; the sealing surface is arranged on the top surface of the bowl edge part and is annularly arranged around the opening, and the sealing surface is lower than the top surface of the bowl edge part; the plurality of wire passing holes are uniformly arranged on the bottom of the bowl in a surrounding manner by taking the center of the bottom of the bowl as a circle center; the thread counter bores are uniformly distributed and annularly arranged on the sealing surface; wherein the bowl edge part, the bowl body part, the bowl bottom part and the plurality of wire passing holes are integrally cast and formed.
In a preferred embodiment, the sealing surface and the threaded counter bores are used for being in sealing connection with the sealing cover plate and the sealing ring of the tensioning end anchor assembly through the outer hexagon bolts, and the accommodating space is sealed to be a closed space.
In a preferred embodiment, the plurality of wire through holes are penetrated by a plurality of steel strands, and the water-swellable rubber is sealed between the bottom surface of the tension anchor and the top surface of the bottom of the bowl and between the wire through holes and the steel strands.
In a preferred embodiment, the accommodating space of the sedimentation type anchor backing plate is filled with a sealing medium for sealing gaps between the plurality of steel strands and the tension anchor and the accommodating space.
In a preferred embodiment, the sedimentation anchor backing plate further comprises a plurality of reinforcing ribs and a plurality of guide blocks; the plurality of reinforcing ribs are uniformly distributed and are arranged between the outer wall of the bowl body part and the bottom surface of the bowl bottom part and between the outer wall of the bowl body part and the bottom surface of the bowl edge part in parallel with the axis of the bowl body part; a plurality of guide positive pieces evenly distributed set up in the bottom surface edge of bowl bottom, and a plurality of guide positive pieces and a plurality of strengthening rib interval set up.
In a preferred embodiment, the number of the reinforcing ribs and the number of the pilot blocks are four.
In a preferred embodiment, the number of the plurality of line through holes is six, the number of the plurality of thread counter bores is four, and the symmetrical center lines of the six line through holes and the stacking center line of the four thread counter bores form an angle.
In a preferred embodiment, the sinker anchor pad further comprises a first marker portion and a second marker portion; the first marking part is arranged on the bowl edge part and positioned outside the outer edge of the sealing surface; the second mark part and the first mark part are symmetrically arranged on the bowl edge part and are positioned outside the outer edge of the sealing surface.
In a preferred embodiment, the sinker anchor plate further comprises an opening chamfer provided at the junction of the inner edge of the opening of the bowl body portion and the sealing surface, the opening chamfer serving as a guide for the installation of the tension anchor.
Compared with the prior art, the anti-corrosion and anti-permeability sedimentation type anchor backing plate has the following beneficial effects: the settlement type anchor backing plate adopts HT250 casting parts, and the structural size of the settlement type anchor backing plate is enough to meet the requirement of 6.1.3 anchoring area force transmission performance in GB/T14370-2015. In order to solve the problems of corrosion prevention and leakage of an anchorage device and a steel strand at a tensioning end in a hole of a settlement type anchor backing plate and meet the requirements of corrosion prevention and leakage resistance design of an anchor rod in terms of 7.5.9 and 7.5.10 in the JGJ476-2019 standard, the anchor backing plate adopts a settlement type to form an independent space, and the joint part of the anchor backing plate and the anchorage device adopts water-swelling rubber to seal the connection part of the anchor backing plate and the anchorage device under the action of tensioning force; the hole is filled with grouting material and the sealing cover completes waterproof sealing of the stretching end to form a closed loop, so that the aims of corrosion resistance and permeability resistance are fulfilled. And a sealing ring is additionally arranged between the sealing cover plate and the sedimentation type anchor backing plate, so that the sealing effect at the bolt connecting hole is further ensured. The sedimentation type anchor backing plate is cast by gray iron, the surface of the sedimentation type anchor backing plate is rough, and the sedimentation type anchor backing plate can be bonded with concrete to solve the problem of seepage of foundation water through the surface of the anchor backing plate. The anchor body at the tensioning end is integrally descended in the bottom plate layer by the settlement type structure to keep the thickness of the surface layer, so that the problem that the water seepage is difficult to control by only 2-3cm space concrete when the upper end surface of the anchor body and the upper plane of the surface layer are less than or equal to 3cm in the prior art is solved. The concrete of the surface layer has enough thickness and integrity, and the seepage-proofing capability is ensured. The thickness of the surface layer of the anchor pile area is ensured by adopting a sedimentation type structural form, and the seepage-proofing capability is stronger; a sedimentation structure form is adopted, so that the tension end anchor body enables the corrosion resistance and the impermeability of the upper end part of the anchor rod to form a complete closed loop under the function action of relatively independent holes and grouting materials, sealing rings and sealing covers; the structural form and the material of the settling anchor backing plate better solve the problem of circular infiltration.
Drawings
Fig. 1 is a schematic view of the overall construction of a sinker type anchor pad bolt construction according to an embodiment of the invention;
FIG. 2 is a schematic structural view of a tension end anchor assembly according to an embodiment of the present invention;
FIG. 3 is a schematic front view of a sinker anchor pad according to an embodiment of the invention;
FIG. 4 is a schematic rear view of a sinker anchor pad according to an embodiment of the invention;
FIG. 5 is a schematic cross-sectional view taken at A-A of FIG. 4;
FIG. 6 is a schematic front view of a sealing cover plate according to an embodiment of the invention;
FIG. 7 is a side cross-sectional schematic view of a sealing cover plate according to an embodiment of the invention;
FIG. 8 is a schematic front view of a seal ring according to an embodiment of the present invention;
FIG. 9 is a side cross-sectional schematic view of a seal ring according to an embodiment of the present invention;
FIG. 10 is a schematic front view of a tension anchor according to an embodiment of the invention;
FIG. 11 is a side cross-sectional schematic view of a tension anchor according to an embodiment of the invention;
FIG. 12 is a schematic front view of a work clip according to an embodiment of the present invention;
FIG. 13 is a side cross-sectional schematic view of a work clip according to an embodiment of the present invention;
fig. 14 is a schematic view of an installation structure of a water stop steel ring assembly according to an embodiment of the present invention.
Description of the main reference numerals:
1-guide frame restraint ring, 2-guide support, 3-center grouting pipe, 4-fixed end anchorage sealing cover, 5-protective medium, 6-fixed end anchorage (extrusion sleeve/spring), 7-pressing pipe/extrusion spring, 8-bearing plate, 9-nut, 10-unbonded steel strand, 11-locking nut/fixed pressure plate, 12-sealing gasket, 13-O-shaped ring, 14-conical sealing ring, 15-locking nut/gasket, 16-spiral rib with straight rib, 17-steel strand center restraint ring, 18-steel strand isolation support, 19-combined water stop steel plate component, 19' -water stop steel ring component, 20-glue injection pressure sleeve, 21-water stop sealing ring, 22-locking nut, 23-water-swellable rubber, 24-settling anchor plate, 2401-bowl edge part, 2402-bowl body part, 2403-bowl bottom part, 2404-sealing surface, 2405-wire through hole, 2406-thread counter bore, 2407-reinforcing rib, 2408-guide block, 2409-first marking part, 2410-second marking part, 2411-opening chamfer, 25-sealing ring, 26-tensioning anchor, 2601-tapered through hole, 27-working clamping piece, 2701-outer conical surface, 2702-inner ring thread tooth, 28-sealing cover plate, 2801-bolt hole and 29-sealing medium.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1 to 5, an anticorrosion and impervious settlement type anchor mat 24 according to a preferred embodiment of the present invention can be applied to an anticorrosion and impervious anchor rod structure for construction, which includes a plurality of steel strands 10 disposed in an anchor rod hole, a tension end anchor assembly disposed at one end of the plurality of steel strands 10, a front anchor carrier assembly disposed at the other end thereof, and a composite type water stop steel plate assembly 19 or a water stop steel ring assembly 19' disposed adjacent to the tension end anchor assembly. Wherein one end of the anchor rod hole comprises a cushion layer, a bottom plate and a surface layer from bottom to top, and the sedimentation type anchor backing plate 24 is contained in the tensioning end anchorage assembly. Subside formula anchor backing plate 24 is bowl form structure, and bowl form structure's bottom inlays to be established in the bottom plate, and bowl form structure's top surface and the top surface parallel and level of bottom plate have the accommodation space in the opening, and the accommodation space is used for installing the stretch-draw ground tackle 26 of stretch-draw end ground tackle subassembly, and the one end of many steel strands 10 is locked on stretch-draw ground tackle 26 through a plurality of work clamping pieces 27 admittedly.
Referring to fig. 3-5, in some embodiments, the sinker anchor pad 24 includes a bowl rim portion 2401, a bowl body portion 2402, a bowl bottom portion 2403, a sealing surface 2404, a plurality of wire holes 2405, and a plurality of threaded counter bores 2406. The bowl rim portion 2401 has a circular ring-shaped structure. The bowl body portion 2402 is of a cylindrical structure, one end of the bowl body portion 2402 is connected with the inner opening of the bowl edge portion 2401 in a sealing mode, and an accommodating space is formed inside the bowl body portion 2402. The bowl bottom 2403 is in a disc-shaped structure, and the bowl bottom 2403 is hermetically connected with the other end of the bowl body 2402. The sealing surface 2404 is disposed on the top surface of the bowl rim portion 2401 and around the opening, and the sealing surface 2404 is lower than the top surface of the bowl rim portion 2401. The plurality of wire through holes 2405 are uniformly arranged on the bowl bottom 2403 in a ring shape by taking the center of the bowl bottom 2403 as a circle center. A plurality of threaded counterbores 2406 are evenly distributed around the sealing surface 2404. The bowl edge part 2401, the bowl body part 2402, the bowl bottom part 2403 and the wire through holes 2405 are integrally cast and formed, the casting material is HT250 cast and formed, and the bearing capacity and the anti-interference capacity of the bearing plate under the support of concrete can meet the design requirements under the relative acting force of the steel strands 10 of the anchor.
As shown in fig. 6 to 9, and referring to fig. 2, in some embodiments, the sealing surface 2404 and the plurality of threaded counter bores 2406 are used to be connected with the sealing cover plate 28 and the sealing ring 25 of the tension end anchor assembly by the hexagon socket head cap screw in a sealing manner, and seal the accommodating space into a closed space. The plurality of wire through holes 2405 are penetrated by a plurality of steel strands 10, and water-swellable rubber 23 is used for sealing between the bottom surface of the tension anchor 26 and the top surface of the bowl bottom 2403 and between the wire through holes 2405 and the steel strands 10. And filling the accommodating space of the sedimentation type anchor backing plate 24 with a sealing medium 29 to seal gaps between the plurality of steel strands 10 and the tension anchor 26 and the accommodating space. The sealing medium 29 of the present embodiment may be filled with C35 grouting material, but the present invention is not limited thereto, and any medium that can be used for protecting the internal anchor structure assembly from rust and leakage can be used.
Referring to fig. 6 to 9, in some embodiments, the sealing cover plate 28 is in a shape of a circular disk with a convex middle portion, the sealing cover plate 28 includes a plurality of through holes uniformly distributed at an outer edge of the sealing cover plate 28, the positions of the plurality of through holes match with the positions of the plurality of threaded counterbores 2406, the sealing cover plate 28 fixes the sealing cover plate 28 to the plurality of threaded counterbores 2406 by passing through the plurality of through holes through external hex bolts, and the sealing ring 25 is disposed between a bottom surface of the outer edge of the sealing cover plate 28 and the sealing surface 2404 of the sinker type anchor plate 24.
As shown in fig. 10-11, in some embodiments, the tension anchor 26 is a thick disc structure, and the tension anchor 26 includes a plurality of tapered through holes 2601 uniformly distributed around the center of the tension anchor 26, the number and position of the plurality of tapered through holes 2601 match the number and position of the plurality of wire holes 2405, wherein the tension anchor 26 is disposed in the accommodating space of the sinker anchor pad 24 with the small ends of the plurality of tapered through holes 2601 facing the plurality of wire holes 2405.
As shown in fig. 12 to 13, in some embodiments, the working clamping piece 27 is a pair of half-cone sleeve structures, the working clamping piece 27 is provided with an annular thread tooth inside, the outside has a taper matched with the tapered through hole 2601, the pair of half-cone sleeve structures of the working clamping piece 27 is fastened to the top ends of the multiple steel strands 10 to remove the outer protection layer (the unbonded steel strands 10 are used to remove the outer protection layer, the half-cone sleeve structure is provided with an inner ring thread tooth 2702, the inner ring thread tooth 2702 of the pair of half-cone sleeve structures is engaged to the removed outer protection layer of the unbonded steel strands 10), and the working clamping piece 27 is embedded in the tapered through hole 2601 to fixedly connect the upper ends of the multiple steel strands 10, the sinker anchor plate 24, the tension anchor 26 and the working clamping piece 27 together through the self-back tension force of the steel strands 10.
Referring to fig. 1 to 2, in some embodiments, the corrosion-resistant and impervious settlement type anchor pad anchor rod structure for buildings further includes a composite water stop steel plate assembly 19, and the composite water stop steel plate assembly 19 is disposed below the tension end anchor assembly and is located at the lower part of the bottom plate and in the pad layer.
In some embodiments, the corrosion and permeability resistant sinker anchor pad anchor structure for construction further comprises a water stop steel ring assembly 19' disposed below the tension end anchor assembly and located in the lower portion of the bottom plate and in the pad, as shown in fig. 14.
Referring to fig. 1, in some embodiments, the corrosion and permeability resistant sinker anchor pad anchor structure for construction further includes a front anchor carrier assembly disposed at the other end of the plurality of steel strands 10. The preposed anchoring bearing body component mainly comprises a guide frame restraint ring 1, a guide support 2, a central grouting pipe 3, a fixed end anchorage sealing cover 4, a protective medium 5, a fixed end anchorage (an extrusion sleeve/spring) 6, a pressure pipe/an extrusion spring 7, a bearing plate 8, a nut 9, a locking nut/a fixed pressing plate 11, a sealing gasket 12, an O-shaped ring 13, a conical sealing ring 14, a locking nut/a gasket 15, a spiral rib 16 with straight ribs and the like. The steel strand central restraining ring 17 and the steel strand isolating support 18 and the like can be further included at the position of the plurality of steel strands 10 between the water-stopping steel plate assembly or the water-stopping steel ring assembly 19' and the front anchoring supporting body assembly.
In some embodiments, the anti-corrosion and anti-permeability sedimentation type anchor backing plate anchor rod structure for the building is provided with perfect sealing and waterproof structures at the front anchoring bearing body component, the water stop steel plate component or the water stop steel ring component and the tensioning end anchor assembly respectively, so that the problem of upward seepage of underground foundation water of the anti-floating anchor rod pile along the steel strand 10 can be well solved.
In conclusion, the anti-corrosion and anti-permeability sedimentation type anchor backing plate has the following beneficial effects: the settlement type anchor backing plate adopts HT250 casting parts, and the structural size of the settlement type anchor backing plate is enough to meet the requirement of 6.1.3 anchoring area force transmission performance in GB/T14370-2015. In order to solve the problems of corrosion prevention and leakage of an anchorage device and a steel strand at a tensioning end in a hole of a settlement type anchor backing plate and meet the requirements of corrosion prevention and leakage resistance design of an anchor rod in terms of 7.5.9 and 7.5.10 in the JGJ476-2019 standard, the anchor backing plate adopts a settlement type to form an independent space, and the joint part of the anchor backing plate and the anchorage device adopts water-swelling rubber to seal the connection part of the anchor backing plate and the anchorage device under the action of tensioning force; the hole is filled with grouting material and the sealing cover completes waterproof sealing of the stretching end to form a closed loop, so that the aims of corrosion resistance and permeability resistance are fulfilled. And a sealing ring is additionally arranged between the sealing cover plate and the sedimentation type anchor backing plate, so that the sealing effect at the bolt connecting hole is further ensured. The sedimentation type anchor backing plate is cast by gray iron, the surface of the sedimentation type anchor backing plate is rough, and the sedimentation type anchor backing plate can be bonded with concrete to solve the problem of seepage of foundation water through the surface of the anchor backing plate. The anchor body at the tensioning end is integrally descended in the bottom plate layer by the settlement type structure to keep the thickness of the surface layer, so that the problem that the water seepage is difficult to control by only 2-3cm space concrete when the upper end surface of the anchor body and the upper plane of the surface layer are less than or equal to 3cm in the prior art is solved. The concrete of the surface layer has enough thickness and integrity, and the seepage-proofing capability is ensured. The thickness of the surface layer of the anchor pile area is ensured by adopting a sedimentation type structural form, and the seepage-proofing capability is stronger; a sedimentation structure form is adopted, so that the tension end anchor body enables the corrosion resistance and the impermeability of the upper end part of the anchor rod to form a complete closed loop under the function action of relatively independent holes and grouting materials, sealing rings and sealing covers; the structural form and the material of the settling anchor backing plate better solve the problem of circular infiltration.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. An anticorrosive and impervious settlement type anchor backing plate can be applied to an anticorrosive and impervious anchor rod structure for a building, the anchor rod structure comprises a plurality of steel strands arranged in an anchor rod hole, a tensioning end anchor assembly arranged at one end of the plurality of steel strands, a front anchoring bearing body assembly arranged at the other end of the plurality of steel strands, and a combined type water stop steel plate assembly or a water stop steel ring assembly arranged close to the tensioning end anchor assembly, wherein one end of the anchor rod hole comprises a cushion layer, a bottom plate and a surface layer from bottom to top, and the settlement type anchor backing plate is contained in the tensioning end anchor assembly; the settling anchor backing plate is of a bowl-shaped structure, the bottom of the bowl-shaped structure is embedded in the bottom plate, the top surface of the bowl-shaped structure is flush with the top surface of the bottom plate, the upper portion of the bowl-shaped structure is provided with an opening, an accommodating space is arranged in the opening and used for installing a tensioning anchor of the tensioning end anchor assembly, and one ends of the steel strands are fixedly locked on the tensioning anchor through a plurality of working clamping pieces.
2. A corrosion and impervious settlement anchor pad according to claim 1, wherein said settlement anchor pad comprises:
a bowl rim portion having a circular ring-shaped structure;
the bowl body part is of a cylindrical structure, one end of the bowl body part is hermetically connected with the inner opening of the bowl edge part, and the inner part of the bowl body part forms the accommodating space;
the bowl bottom is of a disc-shaped structure and is connected with the other end of the bowl body in a sealing manner;
the sealing surface is arranged on the top surface of the bowl edge part and is annularly arranged around the opening, and the sealing surface is lower than the top surface of the bowl edge part;
the wire passing holes are uniformly arranged on the bottom of the bowl in a surrounding manner by taking the center of the bottom of the bowl as a circle center; and
the threaded counter bores are uniformly distributed and annularly arranged on the sealing surface;
wherein the bowl edge part, the bowl body part, the bowl bottom and the plurality of wire passing holes are integrally cast and formed.
3. The corrosion and permeability resistant sinker anchor pad of claim 2, wherein the sealing surface and the threaded counter bores are configured to sealingly engage a sealing cover plate and a sealing ring of the tension end anchor assembly via hex bolts and seal the receiving space as a closed space.
4. An anti-corrosion and anti-permeability sinker anchor pad according to claim 2, wherein the plurality of wire holes are penetrated by the plurality of steel strands, and water-swellable rubbers are sealed between the bottom surface of the tension anchor and the top surface of the bowl bottom and between the wire holes and the steel strands.
5. An anti-corrosion and anti-permeability sinker anchor pad according to claim 2, wherein the receiving space of the sinker anchor pad is filled with a sealing medium for sealing the plurality of strands and the gap between the tension anchor and the receiving space.
6. A corrosion and barrier resistant sinker anchor pad according to claim 2, further comprising:
the plurality of reinforcing ribs are uniformly distributed and are arranged between the outer wall of the bowl body part and the bottom surface of the bowl bottom and the bottom surface of the bowl edge part in parallel with the axis of the bowl body part; and
a plurality of guide blocks, it evenly distributed set up the bottom surface edge of bowl bottom, just a plurality of guide blocks with a plurality of strengthening rib intervals set up.
7. An anti-corrosion and anti-permeability sinker anchor pad according to claim 6, wherein the plurality of reinforcing bars and the plurality of polarization blocks are four in number.
8. The corrosion and permeability resistant sinker anchor pad of claim 2, wherein the plurality of thread holes is six, the plurality of thread counter bores is four, and the symmetrical center lines of the six thread holes and the stacking center lines of the four thread counter bores form an angle.
9. A corrosion and barrier resistant sinker anchor pad according to claim 2, further comprising:
the first marking part is arranged on the bowl edge part and is positioned outside the outer edge of the sealing surface; and
and the second mark part is symmetrically arranged on the bowl edge part and is positioned outside the outer edge of the sealing surface with the first mark part.
10. An anti-corrosion and anti-permeability sinker anchor plate according to claim 2, further comprising an opening chamfer provided at the junction of the sealing surface and the inner edge of the opening of the bowl portion, the opening chamfer serving as a guide for installation of the tension anchor.
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| CN202210092313.9A CN114541381A (en) | 2022-01-26 | 2022-01-26 | Anticorrosive impervious subsides formula anchor backing plate |
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| JP2001011854A (en) * | 1999-06-29 | 2001-01-16 | Sumitomo Electric Ind Ltd | Corrosion-proofing structure of anchorage section in pc steel material |
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| CN113529708A (en) * | 2021-08-12 | 2021-10-22 | 浙江中桥预应力设备有限公司 | Pressure type unbonded prestress anti-seepage anti-floating anchor rod structure |
| CN216713019U (en) * | 2022-01-26 | 2022-06-10 | 浙江中桥预应力设备有限公司 | Anticorrosive impervious subsides formula anchor backing plate |
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2022
- 2022-01-26 CN CN202210092313.9A patent/CN114541381A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001011854A (en) * | 1999-06-29 | 2001-01-16 | Sumitomo Electric Ind Ltd | Corrosion-proofing structure of anchorage section in pc steel material |
| JP2010174553A (en) * | 2009-01-30 | 2010-08-12 | Sumitomo Denko Steel Wire Kk | Anchor structure using anticorrosive pc steel stranded wire, anticorrosive pc steel stranded wire assembly, and construction method for the anchor structure |
| CN206768819U (en) * | 2017-05-22 | 2017-12-19 | 中建三局集团有限公司 | A kind of steel plate combination prestressed anchor water-stopping system |
| CN214301727U (en) * | 2020-11-20 | 2021-09-28 | 四川四海达通工程机械有限公司 | Sinking type reinforced anti-floating anchor rod for existing basement |
| CN113529708A (en) * | 2021-08-12 | 2021-10-22 | 浙江中桥预应力设备有限公司 | Pressure type unbonded prestress anti-seepage anti-floating anchor rod structure |
| CN216713019U (en) * | 2022-01-26 | 2022-06-10 | 浙江中桥预应力设备有限公司 | Anticorrosive impervious subsides formula anchor backing plate |
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