CN112482429A - Replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and replacement and installation method - Google Patents
Replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and replacement and installation method Download PDFInfo
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- CN112482429A CN112482429A CN202011275404.3A CN202011275404A CN112482429A CN 112482429 A CN112482429 A CN 112482429A CN 202011275404 A CN202011275404 A CN 202011275404A CN 112482429 A CN112482429 A CN 112482429A
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- 238000004873 anchoring Methods 0.000 title claims abstract description 32
- 238000009434 installation Methods 0.000 title abstract description 17
- 238000000034 method Methods 0.000 title abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims abstract description 5
- 238000000429 assembly Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 9
- 235000017491 Bambusa tulda Nutrition 0.000 description 9
- 241001330002 Bambuseae Species 0.000 description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 9
- 239000011425 bamboo Substances 0.000 description 9
- 239000011440 grout Substances 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 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
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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Abstract
The invention discloses a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and a replacement and installation method, wherein the foundation comprises a concrete foundation, a secondary grouting layer and a plurality of groups of replaceable anchor bolt assemblies; the replaceable anchor bolt assembly comprises a steel skeleton, an anchor cylinder, an anchor bolt, a sealing assembly and a nut assembly; the steel skeleton and the anchor cylinder are fixedly connected and pre-embedded in the concrete foundation, the anchor rod and the anchor cylinder are fixedly connected through threads, and the sealing assembly is arranged between the anchor rod and the anchor cylinder. And the removable secondary grouting layer is poured between the bottom plate of the workpiece to be fixed and the concrete foundation. All parts of the secondary grouting anchor bolt foundation are organically combined together to form a good stressed whole, so that the integrity of the anchor bolt foundation and the replaceability of the anchor bolt are realized; the replacement and installation method has the advantages of simple steps, small construction difficulty, easy operation and implementation and high replacement efficiency.
Description
Technical Field
The invention belongs to the technical field of engineering installation, relates to an anchor bolt structure for a concrete foundation, and particularly relates to a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and a replacement and installation method.
Background
In the installation of engineering equipment, an anchor bolt is a common method for connecting a foundation when a common structural part is installed and fixed. In various structures and equipment which are fixedly connected with a foundation by adopting foundation bolts, for the structures and equipment with higher requirements on settlement, the elevation of the equipment is usually adjusted regularly according to the result of observation of the settlement of the foundation so as to meet the use requirements. When adjusting equipment elevation, need dismantle fixed equipment's nut repeatedly sometimes, because of dismantling or reasons such as corrosion repeatedly to fixed equipment's nut, the condition of local failure or damage can probably appear in rag bolt's screw thread, at this moment need change rag bolt, but rag bolt generally all buries deeply in the basis, changes more difficultly, and the construction degree of difficulty is great.
The invention patent with application publication number CN106368235A discloses a prestressed cylinder type foundation with replaceable anchor bolts, which mainly comprises a concrete column body, an upper anchor plate, a lower anchor plate, anchor bolts, rigid sleeves and the like, wherein the rigid sleeves for isolating concrete are sleeved outside the anchor bolts. The invention patent with application publication number CN106351247A discloses an anchor cage ring type foundation with replaceable anchor bolts, which mainly comprises a foundation bearing platform, an upper anchor plate, a lower anchor plate, anchor bolts, a rigid sleeve and the like, wherein the rigid sleeve used for isolating concrete is sleeved outside the anchor bolts. The invention patent with application publication number CN105155571A discloses a replaceable prestressed anchor bolt device and an installation and replacement construction method thereof, which mainly comprises an upper anchor plate, a lower anchor plate, an anchor bolt, a plastic sleeve and the like, wherein the plastic sleeve for isolating concrete is sleeved outside the anchor bolt. Patent application with publication number CN201747544U discloses a mounting base of a wind driven generator and the wind driven generator, the mounting base of the wind driven generator mainly comprises a concrete body, at least more than two foundation bolts, sleeves and the like, and the sleeves for isolating the foundation bolts from the concrete body are sleeved on the foundation bolts. All above modes all set up the sleeve pipe in order to keep apart rag bolt or crab-bolt and concrete at rag bolt or crab-bolt overcoat, so there is the clearance between rag bolt or crab-bolt and the sleeve pipe, therefore rag bolt or crab-bolt and concrete do not effectively the consolidation be a atress whole, and the steadiness is relatively poor, and is not hard up easily.
Therefore, how can conveniently change the rag bolt that damages or became invalid, can guarantee again that removable crab-bolt and basic concrete form the atress better holisticly integratively, strengthen the wholeness, can also reduce the construction degree of difficulty effectively, become rag bolt's an optimization direction, have important meaning to the engineering installation field.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and a replacement and installation method.
In order to achieve the purpose, the invention provides a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length, which comprises a concrete foundation, a secondary grouting layer and a plurality of groups of replaceable anchor bolt assemblies; the replaceable anchor bolt assembly comprises a steel skeleton, an anchor cylinder, an anchor bolt, a sealing assembly and a nut assembly;
the anchor cylinder comprises an anchor cylinder tail end section, a plurality of anchor cylinder middle end sections, an anchor cylinder top end section and a plurality of anchor cylinder connecting pieces, wherein the anchor cylinder tail end section, the anchor cylinder middle end sections and the anchor cylinder top end sections are all in a cylindrical structure and have the same outer diameter; the anchor cylinder top end section comprises an upper cylinder body and a lower cylinder body which are integrally formed, the inner diameter of the upper cylinder body is larger than that of the lower cylinder body, so that a step surface A is formed at the junction of the upper cylinder body and the lower cylinder body, a cavity formed in the inner side wall of the upper cylinder body is of a regular polygon prism structure, and the inner side wall of the lower cylinder body is of a thread structure; the inner side walls of the anchor cylinder tail end section and the anchor cylinder middle end section are both provided with a thread structure, and the inner diameters of the anchor cylinder tail end section and the anchor cylinder middle end section are the same as the inner diameter of the lower cylinder body of the anchor cylinder top end section; the anchor cylinder connecting piece is of a cylindrical structure and is used for connecting the tail end section of the anchor cylinder, the middle end section of the anchor cylinder and the top end section of the anchor cylinder, the outer diameter of the anchor cylinder connecting piece is larger than the outer diameter of the tail end section of the anchor cylinder, the inner diameter of the anchor cylinder connecting piece is between the outer diameter and the inner diameter of the tail end section of the anchor cylinder, and counter bores I are formed in the upper end surface and the lower end surface of the anchor cylinder connecting piece;
the anchor rod comprises an upper thread section, a middle section and a lower thread section from top to bottom, the diameter of the middle section is larger than that of the upper thread section and that of the lower thread section, so that a step B surface is formed at the junction of the upper thread section and the middle section, a step C surface is formed at the junction of the lower thread section and the middle section, and the middle section is of a regular polygon prism structure;
the anchor cylinder tail end section, the anchor cylinder middle end section and the anchor cylinder top end section are arranged from bottom to top, the end parts of the anchor cylinder tail end section, the anchor cylinder middle end section and the anchor cylinder top end section are respectively inserted into counter bores I on the upper end surface and the lower end surface of the anchor cylinder connecting piece adjacent to the anchor cylinder tail end section and are fixedly connected with the anchor cylinder connecting piece, and the lower end surface of the anchor cylinder tail end section is fixedly connected with the steel framework; the anchor cylinder and the steel skeleton are pre-embedded in the concrete foundation, and the upper end surface of the top end section of the anchor cylinder is higher than the upper surface of the concrete foundation; the anchor rod is arranged in the anchor cylinder, the lower spiral section of the anchor rod is in threaded connection with the anchor cylinder, the step surface C of the anchor rod is in contact with the step surface A of the top section of the anchor cylinder, and the middle section of the anchor rod is higher than the upper cylinder of the top section of the anchor cylinder; the sealing assembly is embedded between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder and is used for keeping the sealing between the upper cylinder body of the top end section of the anchor cylinder and the anchor rod; the bottom plate of the workpiece to be fixed is sleeved at the upper end part of the upper thread section of the anchor rod, the secondary grouting layer is poured between the bottom plate of the workpiece to be fixed and the concrete foundation, and the nut assembly is installed on the upper thread section of the anchor rod to fix the workpiece to be fixed.
Above-mentioned removable secondary grout crab-bolt basis of anchor adjustable length, seal assembly's effect mainly is sealed between the last barrel that keeps anchor barrel top end section and the stock, avoids in the installation concrete enters into anchor barrel, under the prerequisite that realizes this purpose, and technical staff in the art can design seal assembly or directly adopt the seal assembly of conventional form according to conventional mode. In order to achieve better sealing effect, the sealing assembly preferably comprises a lining and a sealing ring; the bushing is of a regular polygonal column hollow structure, a cavity formed by the inner side wall of the bushing is of a regular polygonal column structure, and the upper end of the outer side wall of the bushing protrudes radially outwards to form an annular flange; the sealing ring is of an annular structure, the upper end and the lower end of the inner side wall of the sealing ring are respectively inwards protruded in the radial direction to form an upper ring body and a lower ring body, the inner diameter of the upper ring body is smaller than that of the lower ring body, and the lower side surface of the upper ring body and the upper side surface of the lower ring body and the sealing ring body jointly form an annular groove; the bush is embedded between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder, and the upper end surface of the bush is flush with the step surface B of the anchor rod; the upper ring body and the lower ring body of the sealing ring are respectively pressed and sleeved on the anchor rod and the lining, and the flange of the lining is clamped in the ring groove of the sealing ring.
Above-mentioned removable secondary grout crab-bolt basis of anchor length adjustable for the installation stability and the leakproofness that increase the sealing washer, preferably be provided with annular groove I on the B step face of stock, the downside setting of the upper ring body of sealing washer and the annular of I adaptation of annular groove I protruding I. Further preferred the up end of barrel sets up annular groove II on the anchor section of thick bamboo, and the downside of the sealing washer lower ring body sets up the annular bulge II with II adaptations of annular groove. Through the cooperation of annular groove and annular bulge, make sealing washer stability reinforcing, difficult not hard up also further increases overall structure's leakproofness from this. Obviously, the number of the annular grooves I and the annular protrusions I matched with the annular grooves I is not limited at all, and the number of the annular grooves II and the annular protrusions II matched with the annular grooves II is not limited at all and can be designed according to practical situations. The sealing ring is a rubber sealing ring. The rubber sealing ring has elasticity, is more convenient to install and is in interference fit with the anchor rod and the lining, so that better sealing performance is achieved.
Above-mentioned be used for concrete foundation anchor length adjustable removable crab-bolt sub-assembly, anchor section of thick bamboo end section, anchor section of thick bamboo middle-end section and anchor section of thick bamboo top section and anchor section of thick bamboo connecting piece are clearance fit. The anchor cylinder comprises an anchor cylinder tail end section, an anchor cylinder middle end section and an anchor cylinder top end section, and the anchor cylinder tail end section, the anchor cylinder middle end section and the anchor cylinder top end section are connected into a whole through the anchor cylinder connecting piece, so that the processing difficulty of long internal threads can be reduced, and the combination flexibility of the anchor cylinder for meeting anchoring requirements with different lengths can be improved. The number of the anchor cylinder middle end sections can be designed according to actual requirements, and in the invention, a plurality of the anchor cylinder middle end sections can be arranged without arranging the anchor cylinder middle end sections or can be arranged in multiple sections of anchor cylinder middle end sections. The end parts of the anchor cylinder tail end section, the anchor cylinder middle end section and the anchor cylinder top end section are preferably welded with the anchor cylinder connecting piece in a fixed connection mode. In order to reduce the influence of welding deformation on the accuracy of the internal thread of the anchor cylinder, preferably, a counter bore II is formed in the upper end face of the tail end section of the anchor cylinder, counter bores III are formed in the upper end face and the lower end face of the middle end section of the anchor cylinder, and a counter bore IV is formed in the lower end face of the lower cylinder body of the top end section of the anchor cylinder; the depth of the counter bore II, the depth of the counter bore III and the depth of the counter bore IV are the same and are all larger than the depth of the counter bore I.
Above-mentioned removable secondary grout crab-bolt basis of anchor adjustable length preferably is at a plurality of anchor bars of fixed connection on the lateral wall of anchor barrel tip section, anchor barrel middle-end festival and anchor barrel top end section. The fixed connection mode of the anchor bars and the outer side wall of the tail end section (the middle section of the anchor cylinder/the top section of the anchor cylinder) of the anchor cylinder is preferably welding. The outer side wall of the anchor cylinder is welded with the anchor bar structure, so that the tightness of the combination of the anchor cylinder and the installation foundation can be further enhanced, and meanwhile, the anchoring performance of the anchor cylinder in the installation foundation can also be enhanced. The number of the anchor bars is not specially limited, and the anchor bars can be designed according to the length of the anchor cylinder and other practical conditions.
Above-mentioned removable secondary grout crab-bolt basis of anchor length adjustable, nut component mainly used cooperation stock upper thread section uses in order fixed workpiece of treating, therefore nut component can be the nut component that this field is commonly used, if including nut, packing ring etc. nut component's mounting means also adopts conventional mode can. The nut assembly of the present invention preferably includes a flat washer, a spring washer, and a nut. The spring washer has the function of preventing the nut from loosening, and the flat washer is used for increasing the contact area between the spring washer and a workpiece to be fixed, so that the stability is further increased.
Above-mentioned removable secondary grout crab-bolt basis of anchor adjustable length, the steel skeleton is fixed in the concrete foundation with an anchor section of thick bamboo when using together, and the steel skeleton mainly plays the supporting role, and it cooperates with an anchor section of thick bamboo, guarantees the positioning accuracy of stock promptly, increases the anchor performance of stock in the basis again. On the premise of achieving the above functions, the specific structure of the steel skeleton is not particularly limited. The steel skeleton preferably comprises a support plate and a plurality of support columns, the support columns are fixedly connected with the lower surface of the support plate, and the fixed connection mode can be a threaded connection mode, a welding mode or an integrated fixed connection mode which is commonly used in the field. The lower end face of the anchor cylinder end section is fixedly connected with the upper surface of the supporting plate, and the fixed connection mode of the anchor cylinder end section and the supporting plate is preferably welding for convenience of production, manufacturing and installation.
Above-mentioned removable secondary grout crab-bolt basis of anchor adjustable length, the upper end face that anchor section of thick bamboo top festival is higher than the upper surface on concrete foundation damages concrete foundation major structure when preventing to change the stock, reduces the construction degree of difficulty simultaneously. The upper surface of the concrete foundation is preferably a horizontal plane.
Above-mentioned removable secondary grout crab-bolt basis of anchor length adjustable, stock interlude are positive polygon prism structure, and the bush is positive polygon prism hollow structure (the cavity also is positive polygon prism structure), and the barrel is positive polygon prism structure on the anchor section of thick bamboo, adopts positive polygon prism structure mainly to make the stock possess the function of preventing changeing with the bolt head, further strengthens the stability of crab-bolt sub-assembly. In consideration of convenience of a manufacturing process and manufacturing cost, the regular polygonal prism structure is preferably a regular hexagonal prism structure or a regular octagonal prism structure, and is more preferably a regular octagonal prism structure.
The invention further provides a replacement construction method of the replaceable secondary grouting anchor bolt foundation with adjustable anchoring length, which comprises the following steps:
removing the nut assembly, removing a bottom plate of a workpiece to be fixed, removing a secondary grouting layer, removing the sealing assembly, screwing and taking out the damaged anchor rod;
inserting a new anchor rod into the anchor cylinder, screwing the anchor rod to enable the lower thread section of the anchor rod to be in threaded connection with the lower cylinder body of the anchor cylinder, and enabling the step surface C of the anchor rod to be in contact with the step surface A of the top section of the anchor cylinder;
embedding a sealing assembly between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder to ensure the sealing property between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder;
and fourthly, sleeving the bottom plate of the workpiece to be fixed on the upper thread section of the anchor rod again, reserving a set distance between the bottom plate and the upper surface of the concrete foundation, pressing the bottom plate tightly through the nut assembly, adjusting the bottom plate, pouring a secondary grouting layer in a gap between the bottom plate and the concrete foundation, and replacing and installing the secondary grouting layer after the secondary grouting layer reaches the specified strength.
According to the replacement construction method of the replaceable secondary grouting anchor bolt foundation with the adjustable anchoring length, the distance between the bottom plate and the upper surface of the concrete foundation has no special requirement, but for the convenience of replacement and removal, the height of the secondary grouting layer is usually 5 cm-10 cm.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial technical effects:
1. the replaceable secondary grouting anchor bolt foundation with adjustable anchoring length comprises a concrete foundation, a secondary grouting layer, a steel skeleton, an anchor cylinder, an anchor rod, a sealing assembly and a nut assembly, wherein the anchor cylinder and the steel skeleton are embedded in the concrete foundation together, so that the positioning accuracy of the anchor rod can be ensured, and the anchoring performance of the anchor rod in the foundation can also be ensured; the anchor cylinder and the anchor rod are in threaded connection, so that the replaceability of the anchor rod is realized, and the combination tightness of the anchor cylinder and the anchor rod is enhanced; the sealing assembly is arranged between the anchor rod and the anchor cylinder, so that the sealing performance of the anchor rod in the installation process is ensured; and the stability of the whole structure is further enhanced through a removable secondary grouting layer, so that all parts of the anchor bolt assembly are organically combined together to form a good stressed whole with a concrete foundation, and the integrity and the replaceability of the anchor bolt assembly are realized.
2. According to the replaceable secondary grouting anchor bolt foundation with adjustable anchoring length, the anchor barrel is formed by connecting modular components (the tail end section of the anchor barrel, the middle end section of the anchor barrel, the top end section of the anchor barrel and the anchor barrel connecting piece), so that the processing difficulty of long internal threads is reduced, the combination flexibility of adapting to anchoring requirements with different lengths is increased, and the anchoring length is adjustable; when the connecting mode is welding, the depth of the counter bores at the upper end of the tail end section of the anchor cylinder, the two ends of the middle section of the anchor cylinder and the lower end of the top section of the anchor cylinder is larger than that of the counter bores at the two ends of the connecting piece of the anchor cylinder, and the influence of welding deformation on the accuracy of the internal thread of the anchor cylinder can be effectively reduced.
3. According to the replaceable secondary grouting anchor bolt foundation with the adjustable anchoring length, the anchor rib structure is arranged on the outer side wall of the anchor cylinder, so that the tightness of the combination of the anchor cylinder and the foundation can be further enhanced, and the anchoring performance of the anchor cylinder in the foundation is enhanced.
4. The replaceable secondary grouting anchor bolt foundation with the adjustable anchoring length, provided by the invention, has the advantages that the sealing assembly is composed of the lining and the sealing ring, and the middle section of the anchor bolt, the inner cavity of the upper cylinder body of the anchor cylinder, the inner cavity of the lining and the side wall all adopt regular polygon prism structures, so that the rotation prevention of the anchor bolt and the lining is realized, and the anchor bolt is convenient to take out from the anchor cylinder.
5. The replaceable secondary grouting anchor bolt foundation with the adjustable anchoring length provided by the invention is reasonable in structural design, can save a large amount of maintenance cost, reduces the cost, improves the economic value of the foundation, and is worthy of popularization.
6. The replacement and installation method of the replaceable secondary grouting anchor bolt foundation with the adjustable anchoring length, provided by the invention, has the advantages of simple steps, low construction difficulty, easiness in operation and implementation and high replacement efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length according to the present invention;
FIG. 2 is a schematic structural view of a single set of replaceable anchor assemblies of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
fig. 4 is an enlarged view of fig. 2 at a portion I.
Description of reference numerals: 1. a concrete foundation; 2. a steel skeleton; 3. an anchor cylinder; 31. an anchor cylinder end section; 32. an anchor barrel connecting piece; 33. a middle end section of the anchor cylinder; 34. an anchor cylinder top section; 4. an anchor rod; 5. a bushing; 6. a seal ring; 7. a base plate; 8. a flat washer; 9. a spring washer; 10. a nut; 11. secondary grouting layer; 12. and (6) anchoring the ribs.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In this embodiment, a replaceable secondary grouting anchor foundation with adjustable anchoring length is shown in fig. 1-2, and includes a concrete foundation 1, a secondary grouting layer 7, and a plurality of sets of replaceable anchor assemblies; the replaceable anchor bolt assembly comprises a steel skeleton 2, an anchor cylinder 3, an anchor rod 4, a sealing assembly and a nut assembly.
The steel skeleton 2 comprises a supporting plate and a plurality of supporting columns, the supporting columns are fixedly connected with the lower surface of the supporting plate, and the number of the supporting columns can be designed according to actual conditions.
The anchor barrel 3 comprises an anchor barrel end section 31, an anchor barrel middle end section 33, an anchor barrel top end section 34 and an anchor barrel connecting member 32. The number of end segments 33 in the anchor shaft is one segment. The anchor cylinder tail end section 31, the anchor cylinder middle end section 33 and the anchor cylinder top end section 34 are all of cylindrical structures and have the same outer diameter.
The anchor barrel top section 34 includes integrally formed upper and lower barrels. The inner diameter of the upper cylinder body is larger than that of the lower cylinder body, so that a step surface A is formed at the junction of the upper cylinder body and the lower cylinder body. A cavity formed on the inner side wall of the upper cylinder body is of a regular octagonal prism structure; the cavity that lower barrel inner wall formed is the cylinder structure, and lower barrel inner wall has the helicitic texture. As shown in fig. 3, the upper end surface of the cylinder body on the anchor cylinder top end section 34 is also provided with an annular groove II.
The inside walls of the anchor cylinder tail end section 31 and the anchor cylinder middle end section 33 are provided with thread structures, and the inner diameters of the anchor cylinder tail end section 31 and the anchor cylinder middle end section 33 are the same as the inner diameter of the lower cylinder body of the anchor cylinder top end section 34. A counter bore II is formed in the upper end face of the anchor cylinder tail end section 31, counter bores III are formed in the upper end face and the lower end face of the anchor cylinder middle end section 33, a counter bore IV is formed in the lower cylinder body lower end face of the anchor cylinder top end section 31, and the counter bores II, the counter bores III and the counter bores IV are the same in aperture and depth.
The anchor barrel connecting piece 32 is of a cylindrical structure, the outer diameter of the anchor barrel connecting piece 32 is larger than the outer diameter of the anchor barrel tail end section 31 (an anchor barrel middle end section 33/an anchor barrel top end section 34), and the inner diameter of the anchor barrel connecting piece 32 is the same as the bore diameter of the counter bore II (a counter bore III/a counter bore IV). Counter bores I are formed in the upper end face and the lower end face of the anchor cylinder connecting piece 32, and the depth of the counter bores II, the depth of the counter bores III and the depth of the counter bores IV are larger than that of the counter bores I. A plurality of anchor bars 12 are uniformly welded on the outer side walls of the anchor cylinder tail end section 31, the anchor cylinder middle end section 33 and the anchor cylinder top end section 34, and the number of the anchor bars 12 can be designed according to actual conditions.
The anchor rod 4 comprises an upper thread section, a middle section and a lower thread section which are coaxial from top to bottom. The diameters of the upper thread section and the lower thread section are the same, and the diameter of the middle section is slightly larger than that of the upper thread section and the lower thread section, so that a step surface B is formed at the junction of the upper thread section and the middle section, and a step surface C is formed at the junction of the lower thread section and the middle section. The middle section is in a regular octagonal prism structure. The height of the middle section of the anchor rod 4 is larger than that of the cylinder body on the anchor cylinder top section 34. As shown in fig. 4, the B step surface of the anchor rod 4 is also provided with an annular groove i.
The seal assembly comprises a liner 5 and a seal ring 6. As shown in FIG. 3, the bushing 5 is a regular octagonal prism hollow structure as a whole, the cavity formed by the inner side wall of the bushing 5 is also a regular octagonal prism structure, and the upper end of the outer side wall of the bushing 5 is radially convex to form an annular flange. The height of the bush 5 is equal to the height of the middle section of the anchor rod 4.
As shown in fig. 4, the sealing ring 6 is an annular structure, the upper and lower ends of the inner sidewall of the sealing ring 6 are respectively protruded inward in the radial direction to form an upper ring body and a lower ring body, the inner diameter of the upper ring body is smaller than that of the lower ring body, and the lower side surface of the upper ring body and the upper side surface of the lower ring body and the sealing ring 6 body together form a ring groove. The downside of the last ring body of sealing washer 6 is provided with the annular bulge I with I adaptation of annular groove. The downside of the lower ring body of sealing washer 6 is provided with the annular bulge II with II adaptations of annular groove. In this embodiment, the seal ring 6 is a rubber seal ring. The inner diameter of the upper ring body is slightly smaller than the diameter of the upper thread section of the anchor rod 4, so that the upper ring body is in interference fit with the anchor rod 4 during assembly. The inner diameter of the lower ring is slightly larger than the diameter of the bushing 5.
The nut assembly comprises a flat washer 8, a spring washer 9 and a nut 10.
The anchor cylinder tail end section 31, the anchor cylinder middle end section 33 and the anchor cylinder top end section 34 are arranged from bottom to top, and the upper end part of the anchor cylinder tail end section 31, the upper end part and the lower end part of the anchor cylinder middle end section 33 and the lower end part of the anchor cylinder top end section 34 are respectively inserted into the counter bores I of the anchor cylinder connecting pieces 33 adjacent to the counter bores and are in clearance fit with the anchor cylinder connecting pieces. The anchor cylinder tail end section, the anchor cylinder middle end section and the anchor cylinder top end section are connected with the anchor cylinder connecting piece 33 in a welding mode. The upper end surface of the anchor cylinder end section 31 is higher than the upper surface of the concrete foundation 1, and the upper surface of the concrete foundation 1 is a horizontal plane. The anchor rod 4 is installed in the anchor cylinder 3, the lower spiral section of the anchor rod 4 is in threaded connection with the anchor cylinder tail end section 31, the anchor cylinder middle end section 33 and the anchor cylinder top end section 34, the step surface C of the anchor rod 4 is in contact with the step surface A of the anchor cylinder top end section 34, and the step surface B of the anchor rod 4 is arranged on the upper end face of the cylinder body on the anchor cylinder top end section 34. During bush 5 inlays and locates the space between the barrel on 4 interlude of stock and the anchor section top 34, the inside wall of barrel on 5 lateral walls of bush and the anchor section top 34 contacts, the lateral wall of 5 inside walls of bush and the 4 interlude of stock contacts, and 5 up end of bush flushes with the B step face of stock 4, and the inside wall of barrel contacts on 5 lateral walls of bush and the anchor section top 34. The upper ring body of the seal ring 6 is pressed and sleeved on the anchor rod 4, the lower ring body is pressed and sleeved on the lining 5, and the flange of the lining 5 is clamped in the annular groove of the seal ring 6; annular protrusion I is clamped in annular groove I, and annular protrusion II is clamped in annular groove II. The bottom plate 7 of the workpiece to be fixed is sleeved on the upper end part of the upper thread section of the anchor rod 4, the secondary grouting layer 7 is poured between the bottom plate 7 of the workpiece to be fixed and the concrete foundation 1, and the flat washer 8, the spring washer 9 and the nut 10 are sequentially sleeved on the upper thread section of the anchor rod 4 to fix the workpiece to be fixed.
Example 2
In this embodiment, a replacement construction method of a replaceable secondary grouting anchor bolt foundation with adjustable anchoring length includes the following steps:
firstly, sequentially taking down a nut 10, a spring washer 9 and a flat washer 8, moving away a bottom plate 7 of a workpiece to be fixed, removing a secondary grouting layer 11, sequentially taking down a sealing ring 6 and a lining 5, screwing and taking out a damaged anchor rod 4;
inserting a new anchor rod 4 into the anchor barrel 3, screwing the anchor rod 4 to enable the lower thread section of the anchor rod 4 to be in threaded connection with the tail end section 31 of the anchor barrel, the middle end section 33 of the anchor barrel and the top end section 34 of the anchor barrel so as to form a whole, and simultaneously enabling the step surface C of the anchor rod 4 to be in contact with the step surface A of the top end section 34 of the anchor barrel;
the flange of the bush 5 is clamped in the annular groove of the seal ring 6, the bush 5 is provided with the seal ring 6 to be embedded into a gap between the upper cylinder body of the anchor cylinder and the middle section of the anchor rod, the upper end surface of the bush 5 is flush with the step surface B of the anchor rod 4, the upper ring body of the seal ring 6 is sleeved on the anchor rod 4 in a pressing mode, the lower ring body is sleeved on the bush 5 in a pressing mode, the annular bulge I is clamped in the annular groove I, and the annular bulge II is clamped in the annular groove II;
fourthly, the bottom plate 7 of the workpiece to be fixed is sleeved on the upper thread section of the anchor rod 4 again, a certain distance is reserved between the bottom plate 7 and the upper surface of the concrete foundation 1, the flat washer 8, the spring washer 9 and the nut 10 are sequentially sleeved on the upper thread section of the anchor rod 4 to tightly press the bottom plate 7, the bottom plate 7 is adjusted, the secondary grouting layer 11 is poured in a gap between the bottom plate 7 and the concrete foundation 1, and after the secondary grouting layer 11 reaches the specified strength, replacement and installation are completed.
Claims (10)
1. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length is characterized by comprising a concrete foundation (1), a secondary grouting layer (11) and a plurality of groups of replaceable anchor bolt assemblies; the replaceable anchor bolt assembly comprises a steel skeleton (2), an anchor cylinder (3), an anchor rod (4), a sealing assembly and a nut assembly; (ii) a
The anchor cylinder (3) comprises an anchor cylinder tail end section (31), a plurality of anchor cylinder middle end sections (33), an anchor cylinder top end section (34) and a plurality of anchor cylinder connecting pieces (32), wherein the anchor cylinder tail end section (31), the anchor cylinder middle end section (33) and the anchor cylinder top end section (34) are all in a cylindrical structure and have the same outer diameter; the anchor cylinder top end section (34) comprises an upper cylinder body and a lower cylinder body which are integrally formed, the inner diameter of the upper cylinder body is larger than that of the lower cylinder body, so that a step surface A is formed at the junction of the upper cylinder body and the lower cylinder body, a cavity formed in the inner side wall of the upper cylinder body is of a regular polygon prism structure, and the inner side wall of the lower cylinder body is of a thread structure; the inner side walls of the anchor cylinder tail end section (31) and the anchor cylinder middle end section (33) are respectively provided with a thread structure, and the inner diameters of the anchor cylinder tail end section (31) and the anchor cylinder middle end section (33) are the same as the inner diameter of the lower cylinder body of the anchor cylinder top end section (34); the anchor cylinder connecting piece (32) is of a cylindrical structure and is used for connecting an anchor cylinder tail end section (31), an anchor cylinder middle end section (33) and an anchor cylinder top end section (34), the outer diameter of the anchor cylinder connecting piece (32) is larger than that of the anchor cylinder tail end section (31), the inner diameter of the anchor cylinder connecting piece (32) is between the outer diameter and the inner diameter of the anchor cylinder tail end section (31), and counter bores I are formed in the upper end face and the lower end face of the anchor cylinder connecting piece (32);
the anchor rod (4) comprises an upper thread section, a middle section and a lower thread section from top to bottom, the diameter of the middle section is larger than that of the upper thread section and that of the lower thread section, so that a step B surface is formed at the junction of the upper thread section and the middle section, a step C surface is formed at the junction of the lower thread section and the middle section, and the middle section is of a regular polygon prism structure;
the anchor cylinder tail end section (31), the anchor cylinder middle end section (33) and the anchor cylinder top end section (34) are arranged from bottom to top, the end parts of the anchor cylinder tail end section are respectively inserted into counter bores I on the upper end surface and the lower end surface of the anchor cylinder connecting piece (32) adjacent to the anchor cylinder tail end section and fixedly connected with the anchor cylinder connecting piece (32), the lower end surface of the anchor cylinder tail end section (31) is fixedly connected with the steel skeleton (2), the anchor cylinder (3) and the steel skeleton (2) are pre-buried in the concrete foundation (1), and the upper end surface of the anchor cylinder top end section (34) is higher than the upper surface of the concrete foundation (1); the anchor rod (4) is arranged in the anchor cylinder (3), the lower spiral section of the anchor rod (4) is in threaded connection with the anchor cylinder (3), the step surface C of the anchor rod (4) is in contact with the step surface A of the top section (34) of the anchor cylinder, and the middle section of the anchor rod (4) is higher than the upper cylinder body of the top section (34) of the anchor cylinder; the sealing assembly is embedded between the middle section of the anchor rod (4) and the upper barrel body of the anchor barrel top end section (34); the bottom plate (7) of the workpiece to be fixed is sleeved at the upper end part of the upper thread section of the anchor rod (4), the secondary grouting layer (11) is poured between the bottom plate (7) of the workpiece to be fixed and the concrete foundation (1), and the nut component is installed on the upper thread section of the anchor rod (4) to fix the workpiece to be fixed.
2. The replaceable secondary grouting anchor foundation of claim 1, wherein the sealing assembly comprises a bushing (5) and a sealing ring (6);
the bushing (5) is of a regular polygonal column hollow structure, a cavity formed by the inner side wall of the bushing (5) is of a regular polygonal column structure, and the upper end of the outer side wall of the bushing (5) protrudes outwards in the radial direction to form an annular flange;
the sealing ring (6) is of an annular structure, the upper end and the lower end of the inner side wall of the sealing ring (6) are respectively inwards protruded in the radial direction to form an upper ring body and a lower ring body, the inner diameter of the upper ring body is smaller than that of the lower ring body, and the lower side surface of the upper ring body and the upper side surface of the lower ring body and the sealing ring (6) body jointly form an annular groove;
the bushing (5) is embedded between the middle section of the anchor rod (4) and the upper barrel body of the anchor barrel top end section (34), and the upper end surface of the bushing (5) is flush with the step surface B of the anchor rod (4); the upper ring body and the lower ring body of the sealing ring (6) are respectively pressed and sleeved on the anchor rod (4) and the lining (5), and the flange of the lining (5) is clamped in the annular groove of the sealing ring (6).
3. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length as claimed in claim 2, wherein an annular groove I is formed on the step surface B of the anchor bolt (4), and an annular protrusion I adapted to the annular groove I is formed on the lower side surface of the upper ring body of the sealing ring (6); the upper end face of the upper cylinder body of the anchor cylinder top section (34) is provided with an annular groove II, and the lower side face of the lower ring body of the sealing ring (6) is provided with an annular bulge II matched with the annular groove II.
4. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length as claimed in claim 2, wherein the upper end face of the anchor barrel end section (31) is provided with a counter bore II, the upper and lower end faces of the anchor barrel middle end section (33) are both provided with counter bores III, and the lower end face of the lower barrel body of the anchor barrel top end section (34) is provided with a counter bore IV; the depth of the counter bore II, the depth of the counter bore III and the depth of the counter bore IV are the same and are all larger than the depth of the counter bore I.
5. The replaceable secondary grouting anchor foundation as claimed in claim 1, wherein the nut assembly comprises a plain washer (8), a spring washer (9) and a nut (10).
6. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length as claimed in claim 1, wherein a plurality of anchor bars (12) are fixedly connected to the outer side walls of the anchor barrel end section (31), the anchor barrel middle end section (33) and the anchor barrel top end section (34).
7. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length as claimed in claim 1, wherein the steel skeleton (2) comprises a supporting plate and a plurality of supporting columns, the supporting columns are fixedly connected with the lower surface of the supporting plate, and the lower end surface of the end section (31) of the anchor cylinder is fixedly connected with the upper surface of the supporting plate.
8. The replaceable secondary grouting anchor foundation with adjustable anchoring length as claimed in any one of claims 1 to 7, wherein the upper surface of the concrete foundation (1) is a horizontal plane.
9. The replaceable secondary grouting anchor bolt foundation with adjustable anchoring length as claimed in any one of claims 1 to 7, wherein the regular polygonal prism structure is a regular hexagonal prism structure or a regular octagonal prism structure.
10. A replacement construction method of a replaceable secondary grouting anchor foundation with adjustable anchoring length according to any one of claims 1 to 9, comprising the steps of:
removing the nut assembly, removing a bottom plate of a workpiece to be fixed, removing a secondary grouting layer, removing the sealing assembly, screwing and taking out the damaged anchor rod;
inserting a new anchor rod into the anchor cylinder, screwing the anchor rod to enable the lower thread section of the anchor rod to be in threaded connection with the anchor cylinder, and enabling the step surface C of the anchor rod to be in contact with the step surface A of the top section of the anchor cylinder;
embedding a sealing assembly between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder to ensure the sealing property between the middle section of the anchor rod and the upper cylinder body of the top end section of the anchor cylinder;
and fourthly, sleeving the bottom plate of the workpiece to be fixed on the upper thread section of the anchor rod again, reserving a set distance between the bottom plate and the upper surface of the concrete foundation, pressing the bottom plate tightly through the nut assembly, adjusting the bottom plate, pouring a secondary grouting layer in a gap between the bottom plate and the concrete foundation, and replacing and installing the secondary grouting layer after the secondary grouting layer reaches the specified strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011275404.3A CN112482429B (en) | 2020-11-16 | 2020-11-16 | Replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and replacement and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011275404.3A CN112482429B (en) | 2020-11-16 | 2020-11-16 | Replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and replacement and installation method |
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| Publication Number | Publication Date |
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| CN112482429A true CN112482429A (en) | 2021-03-12 |
| CN112482429B CN112482429B (en) | 2022-01-28 |
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| CN202011275404.3A Active CN112482429B (en) | 2020-11-16 | 2020-11-16 | Replaceable secondary grouting anchor bolt foundation with adjustable anchoring length and replacement and installation method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002371633A (en) * | 2001-06-14 | 2002-12-26 | Fujio Itagaki | Foundation anchor bolt of building and settlement correcting method of the building |
| CN103758291A (en) * | 2014-01-24 | 2014-04-30 | 东南大学 | Shearing reinforcing type semi-grouting sleeve |
| JP2014163154A (en) * | 2013-02-26 | 2014-09-08 | Shimizu Corp | Structure and construction method of anchorage part of anchor bolt |
| CN105863695A (en) * | 2016-05-03 | 2016-08-17 | 许国安 | Sectional and modular combined anchor rod capable of resisting large deformation and impact and assembling method of combined anchor rod |
| CN206667281U (en) * | 2017-02-20 | 2017-11-24 | 北京健安诚岩土工程有限公司 | A kind of prestressed high-strength bolt assemblies being easily changed |
| CN207659980U (en) * | 2017-07-28 | 2018-07-27 | 湖南大学 | A kind of detachable prefabricated assembled concrete-filled steel square tubular column foot node |
-
2020
- 2020-11-16 CN CN202011275404.3A patent/CN112482429B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002371633A (en) * | 2001-06-14 | 2002-12-26 | Fujio Itagaki | Foundation anchor bolt of building and settlement correcting method of the building |
| JP2014163154A (en) * | 2013-02-26 | 2014-09-08 | Shimizu Corp | Structure and construction method of anchorage part of anchor bolt |
| CN103758291A (en) * | 2014-01-24 | 2014-04-30 | 东南大学 | Shearing reinforcing type semi-grouting sleeve |
| CN105863695A (en) * | 2016-05-03 | 2016-08-17 | 许国安 | Sectional and modular combined anchor rod capable of resisting large deformation and impact and assembling method of combined anchor rod |
| CN206667281U (en) * | 2017-02-20 | 2017-11-24 | 北京健安诚岩土工程有限公司 | A kind of prestressed high-strength bolt assemblies being easily changed |
| CN207659980U (en) * | 2017-07-28 | 2018-07-27 | 湖南大学 | A kind of detachable prefabricated assembled concrete-filled steel square tubular column foot node |
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| CN112482429B (en) | 2022-01-28 |
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