CN110594259B - Multistage anchor bolt and fixing method thereof - Google Patents
Multistage anchor bolt and fixing method thereof Download PDFInfo
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- CN110594259B CN110594259B CN201910753528.9A CN201910753528A CN110594259B CN 110594259 B CN110594259 B CN 110594259B CN 201910753528 A CN201910753528 A CN 201910753528A CN 110594259 B CN110594259 B CN 110594259B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004873 anchoring Methods 0.000 claims abstract description 101
- 230000004323 axial length Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 239000004567 concrete Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 3
- 239000011456 concrete brick Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The application discloses a multistage anchor bolt and a fixing method thereof, wherein the anchor bolt is of N stages, each stage of anchor bolt comprises an anchor bolt and an anchoring part which are matched with each other, the anchoring part is used for fixing the anchor bolts, and two anchor bolts of adjacent stages are connected with each other, wherein N is more than or equal to 2. The multistage anchor bolt and the fixing method thereof have the advantage of high bearing capacity.
Description
Technical Field
The application relates to the field of buildings, in particular to a multistage anchor bolt and a fixing method thereof.
Background
When the concrete structure is anchored in the rear, expansion anchor bolts, chemical anchor bolts and reaming anchor bolts can be adopted. The reaming type anchor bolt has the characteristics of relatively large bearing capacity and low cost, so that the reaming type anchor bolt is widely applied to the field of construction. The reaming type anchor bolt is usually provided with a mechanical key lock to be fixed with a concrete structure, is enough for common buildings, but has higher requirements on anchoring force and reliability, and is particularly suitable for engineering with larger diameter, and the common reaming type anchor bolt, particularly the anchor bolt with larger diameter, has low bearing capacity and is not stable enough because the mechanical key lock only has one stage, and can cause the phenomena of concrete cone damage, anchor bolt pulling damage, anchor bolt penetrating damage and the like along with the time and high load impact, so that safety accidents are caused.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a multi-stage anchor bolt and a method for fixing the same, so as to solve the problem of insufficient bearing capacity in the prior art.
In order to achieve the above object, the technical solution of the embodiment of the present application is as follows:
The anchor bolts are of N levels, each level of anchor bolt comprises anchor bolts and anchoring portions which are matched with each other, the anchoring portions are used for fixing the anchor bolts, two anchor bolts of adjacent levels are connected with each other, and N is more than or equal to 2.
Further, N is greater than or equal to 3, and the anchor bolt comprises a head end member, a tail end member and at least one intermediate member connected between the head end member and the tail end member; the first-stage anchor rod and the first-stage anchoring portion form the head end member, the N-stage anchor rod and the N-stage anchoring portion form the tail end member, and the M-stage anchor rod and the M-stage anchoring portion form the intermediate member, wherein M is more than or equal to 2 and less than or equal to N-1.
Further, one of the mutually connected ends of two adjacent anchor rods is a nut, and the other is a screw.
Further, each stage of the anchor rod includes a positioning portion disposed at a first end of the anchor rod for movement of the anchor rod in cooperation with a tool.
Further, the positioning part is a polygonal column, a polygonal counter bore or an open slot.
Further, the anchoring portion is a sleeve, the anchoring portion is sleeved on the periphery of the anchor rod, each stage of anchor rod comprises an expansion frustum arranged at the second end of the anchor rod, and the maximum diameter of the expansion frustum is larger than the inner diameter of the anchoring portion.
Further, an opening seam is formed on the pipe wall of the anchoring portion, the opening seam extends to the edge of one end of the anchoring portion, which is close to the expansion frustum, and an opening is formed at the edge of the anchoring portion; and/or, along the circumferential direction of the anchoring part, annular cutting grooves are arranged in the range of the axial length of the pipe wall of the anchoring part corresponding to the expansion frustum.
Further, the nth stage anchor rod comprises a bottom bracket arranged at the bottom of the expansion frustum.
A method of securing a multi-stage anchor, comprising: s10, forming N-level blind holes in the connecting base material, wherein N is more than or equal to 2; s20, placing the N-level anchor bolt into the N-level blind hole; s30, fixing the N-level anchor bolt with the N-level blind hole; in the process of sequentially fixing the N-1 level anchor bolt to the first level anchor bolt, repeating the following steps S40-S50: s40, placing the X-th level anchor bolt into the X-th level blind hole and connecting the X-th level anchor bolt with the previous level anchor bolt, wherein X is more than or equal to 1 and less than or equal to N-1; s50, fixing the X-stage anchor bolt with the X-stage blind hole.
Further, in the step S10, a bottom expansion for fixing is formed at the bottom end of each level of blind hole.
The beneficial effects are that: compared with the prior art, the application has the advantages that the N-level anchor bolts are arranged, each level of anchor bolt comprises the anchor bolts and the anchoring parts which are matched with each other, the anchoring parts are used for fixing the anchor bolts on the outer wall of the blind hole of the corresponding level, so that multi-level fixed connection is formed, two anchor bolts of adjacent levels are directly or indirectly connected, the two anchor bolts can jointly act, the connection capability between the anchor bolts and the blind hole is improved in multiple, and the integral bearing capacity is effectively improved.
Drawings
FIG. 1 is a schematic illustration of one embodiment of a multi-stage anchor of the present application;
FIG. 2 is another embodiment of a multi-level anchor structure of the present application;
FIG. 3 is a further embodiment of a multi-level anchor structure of the present application, with the head end member and the tail end member omitted;
FIG. 4 is a schematic structural view of the head end member with the first stage anchor in an inactive state;
FIG. 5 is a schematic structural view of the head end member with the first stage anchor in operation;
FIG. 6 is a schematic structural view of an intermediate member formed by the cooperation of a second-stage anchor rod and a second-stage anchor portion, wherein the second-stage anchor portion is in an inactive state;
FIG. 7 is a schematic structural view of an intermediate member in which the second stage anchor is in operation;
FIG. 8 is a schematic structural view of the end member with the Nth stage anchor in an inactive state;
FIG. 9 is a schematic structural view of the end member with the Nth stage anchor in an operative condition;
FIG. 10 is a first embodiment of a partial construction of a first end of a bolt;
FIG. 11 is a top view of FIG. 10;
FIG. 12 is a second embodiment of a partial construction of a first end of an anchor rod;
FIG. 13 is a top view of FIG. 12;
FIG. 14 is a third embodiment of a partial structure of a first end of an anchor rod;
FIG. 15 is a top view of FIG. 14;
FIG. 16 is a fourth embodiment of a partial structure of a first end of an anchor rod;
FIG. 17 is a top view of FIG. 16;
FIG. 18 is a fifth embodiment of a partial construction of a first end of an anchor rod;
FIG. 19 is a top view of FIG. 18;
FIG. 20A is a step a-f of an embodiment of a method of securing a multi-level anchor of the present application, wherein the blind hole is three-level;
FIG. 20B is a step g-i of an embodiment of a method of securing a multi-level anchor of the present application;
FIG. 20C is a j-l step of an embodiment of a method of securing a multi-level anchor of the present application;
FIG. 20D shows an m-o step of an embodiment of a method of securing a multi-level anchor of the present application.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments of the present application and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be construed as illustrating the present application and should not be construed as unduly limiting the present application.
In the description of the embodiments of the present application, the terms "upper", "lower", "left", "right", "front", "rear" or positional relationship are based on the positional relationship shown in fig. 1, and it should be understood that these terms are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the embodiments of the present application, for ease of understanding and in general terms, unless otherwise indicated, the first end of the anchor rod refers to the end distal from the bore bottom of the blind bore and the second end of the anchor rod refers to the end proximal to the bore bottom of the blind bore.
As shown in fig. 1 to 9, a multi-stage anchor bolt is exemplified by an N-stage anchor bolt, wherein N is not less than 2, each stage anchor bolt includes anchor bolts and anchoring portions which are mutually matched, the anchoring portions are used for fixing the anchor bolts on the outer wall of a blind hole 9 (mentioned below) of a corresponding stage, and two anchor bolts of adjacent stages are directly or indirectly connected, so that the two anchor bolts can jointly act, the connection capability between the anchor bolts and the blind hole 9 is doubly improved, and the overall bearing capacity is effectively improved.
Specifically, the anchor bolt comprises a head end component 1 and a tail end component 2, the N-level anchor bolt comprises a first-level anchor bolt 11 and an N-level anchor bolt 21, the N-level anchor bolt comprises a first-level anchor bolt 12 and an N-level anchor bolt 22, the first-level anchor bolt 12 is used for fixing the first-level anchor bolt 11 on the outer wall of the first-level blind hole 9, so that the first-level anchor bolt 11 and the first-level anchor bolt 12 are fixed in a matched mode to form the head end component 1, the N-level anchor bolt 22 is used for fixing the N-level anchor bolt 21 on the outer wall of the N-level blind hole 9, so that the N-level anchor bolt 21 and the N-level anchor bolt 22 are fixed in a matched mode to form the tail end component 2, the second end of the first-level anchor bolt 11 comprises a first connecting portion 13, the first end of the N-level anchor bolt 21 comprises a second connecting portion 23, and the first connecting portion 13 and the second connecting portion 23 are directly or indirectly connected and fixed, so that the first-level anchor bolt 11 and the N-level anchor bolt 21 are directly or indirectly connected into a whole, and accordingly the first-level anchor bolt 1 and the first-level anchor bolt 2 can be fixed in a fixed mode and the whole, the bearing capacity of the first-level anchor bolt 2 can be improved, and the whole bearing capacity can be improved.
It should be understood that the direct connection means that the first connection portion 13 and the second connection portion 23 are detachably connected, so that the head end member 1 and the tail end member 2 are fixed, and the connection mode can be threaded connection or clamping connection; the indirect connection means that the first connection part 13 and the second connection part 23 are respectively connected and fixed with a transition piece (not shown in the figure), namely, after the tail end component 2 is put into the blind hole 9, the transition piece is accessed, and then the head end component 1 is put into the blind hole 9 and connected with the transition piece, so that the head end component 1 and the tail end component 2 are indirectly connected into a whole, and the first-stage fixation of the head end component 1 and the Nth-stage fixation of the tail end component 2 can jointly act to bear load; furthermore, the transition piece may be referred to as an intermediate member 3 (mentioned below), i.e. the transition piece itself may also be fixed to the blind hole 9, or the transition piece may be just a separate connection piece and not to the blind hole 9.
In one possible embodiment, as shown in fig. 2, 3, 6, 7, 10 to 19 and 20A to 20D, n+.3, the anchor bolt further comprises an intermediate member 3, the intermediate member 3 being connected between the head member 1 and the tail member 2, in particular, the N-stage anchor bolt comprises a second stage anchor bolt 31, a third stage anchor bolt … … and an N-1-stage anchor bolt, the N-stage anchor portion comprises a second stage anchor portion 32, a third stage anchor portion … … and an N-1-stage anchor portion; the second-stage anchoring part 32 is used for fixing the second-stage anchor rod 31 on the outer wall of the second-stage blind hole 9, so as to form second-stage fixation; the third-stage anchoring part is used for fixing the third-stage anchor rod on the outer wall of the third-stage blind hole 9, so that third-stage fixing is formed; and so on; the N-1 level anchoring part is used for fixing the N-1 level anchor rod on the outer wall of the N-1 level blind hole 9, so that N-1 level fixing is formed; thus, one intermediate member is formed by the M-th anchor rod and the M-th anchor portion, wherein M is 2.ltoreq.M.ltoreq.N-1, that is, the second anchor rod 31 is matched with the second anchor portion 32, the third anchor rod is matched with the third anchor portion … …, the N-1-th anchor rod is matched with the N-1-th anchor portion, so that the N-2-stage intermediate member 3 is formed.
The first-stage anchor rod 11 and the N-th-stage anchor rod 21 are connected into a whole through the second-stage anchor rod 31, the third-stage anchor rod … … and the N-1-th-stage anchor rod, so that the head end component 1 and the tail end component 2 are connected into a whole through the N-2-stage intermediate component 3, the first-stage fixing of the head end component 1, the second-stage fixing of the intermediate component 3 and the N-1-th-stage fixing of the third-stage fixing … … can be combined with the N-th-stage fixing of the tail end component 2, the connection capability between the anchor bolt and the N-stage blind hole 9 is improved in multiple, and the whole bearing capacity is effectively improved.
Taking N is more than or equal to 4, namely the number of the intermediate members 3 is more than two, as shown in fig. 3, 6, 7 and 10 to 19, the first ends of the second-stage anchor rods 31, the third-stage anchor rods … … and the N-1-stage anchor rods forming the N-2-stage intermediate members 3 comprise a third connecting part 33, and the second ends comprise a fourth connecting part 34; the above detachable connection manner of the components is not limited to the detachable connection manner such as threaded connection or clamping connection, specifically, taking threaded connection as an example, the third connection portion 33 of the intermediate member 3 adjacent to the head end member 1 is detachably connected with the first connection portion 13 of the head end member 1, one of the connection portions is a nut, and the other connection portion is a matched screw; the fourth connecting portion 34 of the intermediate member 3 adjacent to the end member 2 is detachably connected to the second connecting portion 23 of the end member 2, one of which is a nut and the other of which is a mating screw; the third connecting part 33 of one stage of intermediate member 3 is detachably connected with the fourth connecting part 34 of the other stage of intermediate member 3, one of the two adjacent stages of intermediate members 3 is a nut, and the other is a matched screw; so as to facilitate the connection of the two.
Taking the number of intermediate members 3 as an example, i.e., n=3, as shown in fig. 2, 6, 7, 10 to 19 and 20A to 20D, the first end of the second-stage anchor rod 31 includes a third connecting portion 33, and the second end of the second-stage anchor rod 31 includes a fourth connecting portion 34 to facilitate connection; the middle member 3 is arranged between the head end member 1 and the tail end member 2, the third connecting part 33 is detachably connected with the first connecting part 13, the fourth connecting part 34 is detachably connected with the second connecting part 23, the connection mode is not limited to threaded connection or clamping connection, and if threaded connection is adopted, one of the third connecting part 33 and the first connecting part 13 is a nut, and the other is a matched screw; similarly, one of the fourth connecting portion 34 and the second connecting portion 23 is a nut, and the other is a matched screw rod, so as to facilitate connection of the two.
It should be understood that each level of intermediate member 3 can be fixed with the corresponding level of blind hole 9, so as to obtain second level of fixation, third level of fixation … … and N-1 th level of fixation, setting the rated load of each level of fixation as F3, setting the first level of fixation of the head end member 1, the rated load as F1, the second level of fixation of the tail end member 2 and the rated load as F2, so that the total bearing capacity of the anchor bolt with N-2 levels of intermediate member 3 is f1+f2+ (N-2) F3 can be scientifically calculated, wherein the condition of n=2 is a special condition that the head end member 1 is directly connected with the tail end member 2, and n=3 is a special condition that the head end member 1 is indirectly connected with the tail end member 2 through the level of intermediate member 3; the anchor bolts are fixed on the blind holes 9 of the corresponding stages through the corresponding primary anchoring parts of each stage of anchor bolts, so that multistage fixed anchor bolts are formed, and each stage of member can provide independent bearing capacity and act together, so that the upper load limit is calculated through reasonable design and construction, the N-2 stage of intermediate member 3 is matched with the head end member 1 and the tail end member 2, and the conditions of concrete cone damage, anchor bolt pulling-out damage, anchor bolt penetrating-out damage and the like can be completely avoided.
In one possible embodiment, as shown in fig. 6, 7, 10 to 19 and 20A to 20D, each intermediate member 3 or head member 1 needs to be connected to a member previously placed in the blind hole 9, where the member refers to the end member 2 or the intermediate member 3 of the previous stage previously placed in the blind hole 9, and the blind hole 9 is a hole having a certain depth, so that it is inconvenient to directly operate by hand to implement a detachable connection manner such as screwing or clamping, and thus, each anchor may include a positioning portion 4 disposed at the first end of the anchor to facilitate the tool to move the anchor itself in cooperation therewith.
Specifically, taking the connection example of the N-2 th intermediate member 3 and the end member 2, the N-2 th intermediate member 3 is formed by an N-1 th anchoring portion and an N-1 th anchor rod, when the intermediate member 3 is placed in the device, the fourth connecting portion 34 needs to be in threaded connection with the second connecting portion 23 of the N-1 th anchor rod, and an operator clamps the positioning portion 4 located at the first end of the N-1 th anchor rod with a tool, so as to drive the N-1 th anchor rod to rotate, and the fourth connecting portion 34 at the second end of the N-1 th anchor rod is screwed into the second connecting portion 23 of the end member 2 to achieve connection. The connection between the upper intermediate member 3 and the lower intermediate member 3, and the connection between the head member 1 and the first intermediate member 3 are the same, and will not be described again here.
The positioning portion 4 may have various implementation structures:
As shown in fig. 10 and 11, taking the first-stage intermediate member 3 formed by matching the second-stage anchor rod 31 with the second-stage anchor portion 32 as an example, the third connecting portion 33 is a screw, the positioning portion 4 is a polygonal column integrally extending from the end face of the second-stage anchor rod 31, the third connecting portion 33 is disposed at the end of the positioning portion 4, and the tool used is a long-handle sleeve matched with the polygonal column.
As shown in fig. 12 and 13, taking the first-stage intermediate member 3 formed by matching the second-stage anchor rod 31 with the second-stage anchor portion 32 as an example, the third connecting portion 33 is a screw, the positioning portion 4 is a polygonal counterbore, for example, a common internal hexagonal counterbore, the positioning portion 4 is disposed at the end portion of the third connecting portion 33, and the tool used is an internal hexagonal bolt wrench matched with the internal hexagonal counterbore.
As shown in fig. 14 and 15, taking the first-stage intermediate member 3 formed by matching the second-stage anchor rod 31 with the second-stage anchor portion 32 as an example, the third connecting portion 33 is a screw, and a part of the third connecting portion 33 is missing in the circumferential direction to form the positioning portion 4, that is, the third connecting portion 33 is in the circumferential direction, the area of part of the length has threads that can be matched with the nut, and the other part of the missing threads form an open slot, that is, a customized tool can be adopted to clamp for convenient rotation.
As shown in fig. 16 and 17, taking the end member 2 as an example, the second connecting portion 23 is a nut, the positioning portion 4 is a polygonal column integrally extending from an end face of the first end of the nth stage anchor 21, and the second connecting portion 23 is provided on the positioning portion 4; the tool is a long handle sleeve matched with the polygonal upright post.
As shown in fig. 18 and 19, taking the head end member 1 as an example, the positioning portion 4 is a positioning groove or a positioning protrusion structure, and the second end of the first-stage anchor rod 11 is missing or added to form a customized positioning portion 4 in the radial direction, so that a customized tool can be used for clamping to facilitate rotation.
It should be understood that the above various embodiments are all intended to achieve the connection of the head end member 1 with the intermediate member 3, the intermediate member 3 with the intermediate member 3, and the intermediate member 3 with the end member 2. Accordingly, each embodiment structure can be commonly used among the head end member 1, the intermediate member 3, and the end member 2, thereby facilitating the connection operation.
In one possible embodiment, as shown in fig. 4 to 9 and 20A to 20D, the anchoring portion is a sleeve, the anchoring portion is sleeved on the periphery of the anchor rod, each stage of anchor rod includes an expansion frustum 5 disposed at the second end of the stage of anchor rod, and the maximum diameter of the expansion frustum 5 is greater than the inner diameter of the stage of anchoring portion, and it should be understood that the stage of anchoring portion refers to the anchoring portion corresponding to the stage of anchor rod; in addition, the pipe wall of the anchoring portion is formed with an opening slit 6, the opening slit 6 extends to the edge of one end of the anchoring portion near the expansion frustum 5, and an opening 7 is formed at the edge of the anchoring portion; along the circumferential direction of the anchoring portion, annular grooves 8 are arranged in the range of the pipe wall of the anchoring portion corresponding to the axial length of the expansion frustum 5.
Specifically, taking the head end member 1 as an example, as shown in fig. 4, 5 and 20A to 20D, the first-stage anchoring portion 12 is a sleeve, the first-stage anchoring portion 12 is sleeved on the outer periphery of the first-stage anchoring portion 11, the first-stage anchoring portion 11 includes an expansion frustum 5 disposed at the second end of the first-stage anchoring portion 11, the first connecting portion 13 is disposed on the expansion frustum 5, the maximum diameter of the expansion frustum 5 is larger than the inner diameter of the nth-stage anchoring portion 22, in an inactive state, the first-stage anchoring portion 12 cannot be sleeved into the expansion frustum 5, an expanded bottom 91 (mentioned below) is formed at the bottom end of each of the first-stage blind holes 9, when the first-stage anchoring portion 12 needs to be formed and fixed, the lower end of the first-stage anchoring portion 12 is deformed into a cone shape along the expansion frustum 5 and stretches into the expanded bottom 91 to form a back-off, in this case, in an active state, when the first-stage anchoring portion 11 is pulled out upwards under the load, the expansion frustum 5 is buckled on the first-stage anchoring portion 12, and then the first-stage anchoring portion 12 is buckled on the bottom 91, thereby realizing the fixation of the head end member 1 and the first-stage blind hole 9. The pipe wall of the first-stage anchoring portion 12 may be formed with an opening slit 6, the opening slit 6 extends to an edge of one end of the first-stage anchoring portion 12, which is close to the expansion frustum 5, and an opening 7 is formed at the edge of the first-stage anchoring portion 12, and an annular slot 8 is provided in a range of the pipe wall of the first-stage anchoring portion 12 corresponding to the axial length of the expansion frustum 5 along the circumferential direction of the first-stage anchoring portion 12, both structures being for convenience and the first-stage anchoring portion 12 being deformable without applying an excessive impact force so as not to damage the concrete structure.
Taking the end member 2 as an example, as shown in fig. 8, 9 and 20A to 20D, the nth stage anchor portion 22 is a sleeve, the nth stage anchor portion 22 is sleeved on the periphery of the nth stage anchor 21, the nth stage anchor 21 includes an expansion frustum 5 disposed at the second end of the nth stage anchor 21, and the maximum diameter of the expansion frustum 5 is larger than the inner diameter of the nth stage anchor portion 22; in the non-working state, the nth stage anchoring portion 22 cannot be sleeved into the expansion frustum 5, when the fixation is required, the nth stage anchoring portion 22 is struck by external force, the lower end of the nth stage anchoring portion is deformed into a cone shape along the expansion frustum 5 and stretches into the expanded bottom 91 to form a back-off, when the nth stage anchoring portion 21 is in the working state, the nth stage anchoring portion 22 is buckled on the nth stage anchoring portion 5 under the action of load, and then the nth stage anchoring portion 22 is buckled on the expanded bottom 91, so that the nth stage fixation of the tail end component 2 and the nth stage blind hole 9 is realized. The pipe wall of the Nth-stage anchoring part 22 is provided with an opening seam 6, the opening seam 6 extends to the edge of one end of the Nth-stage anchoring part 22 close to the expansion frustum 5, and an opening 7 is formed at the edge of the Nth-stage anchoring part 22; along the circumferential direction of the Nth-stage anchoring portion 22, annular grooves 8 are formed in the range of the pipe wall of the Nth-stage anchoring portion 22 corresponding to the axial length of the expansion frustum 5; both structures are provided to facilitate the deformation of the nth stage anchor 22 without applying excessive impact force so as not to damage the concrete structure. In addition, the nth stage anchor 21 includes a bottom bracket 212 disposed at the bottom of the expansion frustum 5, so as to conveniently support the bottom end of the blind hole 9.
Taking the intermediate member 3 as an example, as shown in fig. 6, 7 and 20A to 20D, the second-stage anchoring portion 32 is a sleeve, the second-stage anchoring portion 32 is sleeved on the outer periphery of the second-stage anchoring portion 31, the second-stage anchoring portion 31 includes an expansion frustum 5 disposed at the second end of the second-stage anchoring portion 31, the fourth connecting portion 34 is disposed on the expansion frustum 5, the maximum diameter of the expansion frustum 5 is larger than the inner diameter of the second-stage anchoring portion 32, in the non-working state, the second-stage anchoring portion 32 cannot be sleeved into the expansion frustum 5, when the second-stage anchoring portion 32 needs to be fixed, the second-stage anchoring portion 32 is struck by external force, the lower end of the second-stage anchoring portion deforms into a cone shape along the expansion frustum 5 and stretches into the expanded bottom 91 to form a back-off, in the working state at this time, when the second-stage anchoring portion 31 is pulled up under the load, the expansion frustum 5 is buckled on the second-stage anchoring portion 32, and then the second-stage anchoring portion 32 is buckled on the expanded bottom 91, thereby realizing the third-stage fixing of the intermediate member 3 and the blind hole 9. The pipe wall of the second-stage anchoring part 32 is provided with an opening seam 6, the opening seam 6 extends to the edge of one end of the second-stage anchoring part 32 close to the expansion frustum 5, and an opening 7 is formed at the edge of the second-stage anchoring part 32; along the circumference of the second-stage anchoring portion 32, annular grooves 8 are formed in the range of the pipe wall of the second-stage anchoring portion 32 corresponding to the axial length of the expansion frustum 5, and the second-stage anchoring portion 32 can be deformed conveniently without applying excessive impact force so as not to damage the concrete structure.
The method for fixing the multistage anchor bolt comprises the following steps:
S10, forming N-level blind holes 9,N to be more than or equal to 2 in a connecting base material, wherein the connecting base material can be natural compact stone, solid bricks, hollow concrete bricks, light concrete bricks and reinforced concrete walls; each level of blind hole 9 can be drilled by adopting a common electric hammer drill;
s20, placing an N-level anchor rod 21 into the N-level blind hole 9;
s30, fixing the Nth-stage anchor rod 21 with the blind hole 9;
In the process of sequentially fixing the N-1 level anchor rod to the first level anchor rod, the following steps S40 to S50 are repeated:
S40, placing the X-th anchor rod into the X-th blind hole 9 and directly or indirectly connecting the X-th anchor rod with the upper anchor rod, wherein X is more than or equal to 1 and less than or equal to N-1;
s50, fixing the X-level anchor rod with the X-level blind hole 9.
In a possible implementation manner, in step S10, the bottom end of the blind hole 9 is formed with a bottom expansion 91 for fixing, so as to facilitate the fixation of the anchoring portion of the corresponding stage; specifically, a common electric hammer is adopted to drill a row of holes, a first-stage cylindrical blind hole 9 is formed in a connecting base metal, then a special bottom-enlarging drill is adopted to enlarge the bottom of the hole to form a bottom-enlarging 91, namely, the bottom-enlarging 91 is formed at the depth bottom of the first-stage blind hole 9; continuing to drill deep by adopting a common electric hammer until the depth of the second-stage blind hole 9 is reached, and then adopting a special bottom-enlarging drill bit to enlarge the bottom of the hole, namely forming a bottom-enlarging 91 at the bottom of the second-stage depth; and so on, a blind hole 9 with an N-stage undercut 91 may be formed.
The blind holes 9 are used as three stages, and a specific anchoring method of the expansion type multistage anchor bolt in site construction is described;
as shown in fig. 20A to 20D, in order:
a. Forming a first-stage blind hole 9;
b. machining the expanded bottom 91 of the first-stage blind hole 9;
c. Forming a second-stage blind hole 9;
d. Machining the expanded bottom 91 of the second-stage blind hole 9;
e. Forming a third-stage blind hole 9;
f. Machining a bottom expansion 91 of the third-stage blind hole 9;
g. placing the end member 2 and applying an external force to strike the nth stage anchor 22;
h. The Nth-stage anchoring part 22 is deformed and embedded into the expanded bottom 91 of the third-stage blind hole 9 to realize the third-stage fixation of the tail end component 2 and the third-stage blind hole 9;
i, placing the intermediate member 3, embedding the positioning part 4 by adopting the socket head cap screw wrench 103, screwing the fourth connecting part 34 and the second connecting part 23, completely screwing the screw rod between the fourth connecting part 34 and the second connecting part into the nut, and forming rigid interference at the bottom end to obtain a firmer connecting effect;
j. Applying an external force to strike the second stage anchor 32;
k. The second-stage anchor part 32 is deformed and embedded into the expanded bottom 91 of the second-stage blind hole 9 to realize the second-stage fixation of the intermediate member 3 and the second-stage blind hole 9;
the head end component 1 is placed, external force is applied to the first-stage anchor rod 11, the first-stage anchor rod 11 rotates to screw the third connecting part 33 and the first connecting part 13, a screw rod between the third connecting part 33 and the first connecting part is completely screwed into a nut, and the bottom end forms rigid interference to obtain a firmer connecting effect;
applying an external force to strike the first stage anchor 12;
n, the first-stage anchoring part 12 is deformed and embedded into the expanded bottom 91 of the first-stage blind hole 9 to realize the first-stage fixation of the head end component 1 and the first blind hole 9;
And a connecting member can be arranged at the exposed part of the second end of the first-stage anchor rod 11 far away from the first connecting part 13, and comprises an outer nut 100, a spring washer 101, a flat washer 102 and the like, so that the final anchoring connection of the anchor bolt is completed.
The various embodiments/implementations provided by the application may be combined with one another without contradiction.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A multistage anchor bolt, characterized in that: the anchor bolts are of N levels, each level of anchor bolt comprises an anchor bolt and an anchoring part which are matched with each other, the anchoring part is used for fixing the anchor bolts, and two anchor bolts of adjacent levels are connected with each other, wherein N is more than or equal to 2;
The anchor bolt comprises a head end component and a tail end component, a first-stage anchor bolt and a first-stage anchoring portion form the head end component, an N-stage anchor bolt and an N-stage anchoring portion form the tail end component, a second end of the first-stage anchor bolt comprises a first connecting portion, a first end of the N-stage anchor bolt comprises a second connecting portion, and the first connecting portion is directly or indirectly detachably connected with the second connecting portion.
2. The multi-stage anchor as set forth in claim 1, wherein: n is more than or equal to 3, and the anchor bolt comprises at least one middle component connected between the head end component and the tail end component; the M-th anchor rod and the M-th anchor part form one intermediate member, wherein M is more than or equal to 2 and less than or equal to N-1.
3. The multi-stage anchor as set forth in claim 1, wherein: one of the mutually connected ends of two adjacent anchor rods is a nut, and the other is a screw rod.
4. A multistage anchor according to any one of claims 1 to 3, characterized in that: each stage of the anchor rod comprises a positioning part arranged at the first end of the anchor rod, and the positioning part is used for moving the anchor rod by matching a tool with the positioning part.
5. The multi-stage anchor as set forth in claim 4, wherein: the positioning part is a polygonal upright post, a polygonal counter bore or an open slot.
6. A multistage anchor according to any one of claims 1 to 3, characterized in that: the anchoring portion is a sleeve, the anchoring portion is sleeved on the periphery of the anchor rod, each stage of anchor rod comprises an expansion frustum arranged at the second end of the anchor rod, and the maximum diameter of the expansion frustum is larger than the inner diameter of the anchoring portion.
7. The multi-stage anchor as set forth in claim 6, wherein: the pipe wall of the anchoring part is provided with an opening seam, the opening seam extends to the edge of one end of the anchoring part, which is close to the expansion frustum, and an opening is formed at the edge of the anchoring part; and/or the number of the groups of groups,
And annular grooves are formed in the range, corresponding to the axial length of the expansion frustum, of the pipe wall of the anchoring part along the circumferential direction of the anchoring part.
8. The multi-stage anchor as set forth in claim 6, wherein: the Nth-stage anchor rod comprises a bottom support arranged at the bottom of the expansion frustum.
9. A method for securing a multistage anchor according to any one of claims 1 to 8, characterized in that it comprises:
S10, forming N-level blind holes in the connecting base material, wherein N is more than or equal to 2;
s20, placing the N-level anchor bolt into the N-level blind hole;
s30, fixing the N-level anchor bolt with the N-level blind hole;
In the process of sequentially fixing the N-1 th-stage anchor bolts to the first-stage anchor bolts, repeating the following steps S40-S50, so that the first connecting part and the second connecting part are directly or indirectly detachably connected, wherein the first-stage anchor bolts are head end members, and the N-th-stage anchor bolts are tail end members:
s40, placing the X-th level anchor bolt into the X-th level blind hole and connecting the X-th level anchor bolt with the previous level anchor bolt, wherein X is more than or equal to 1 and less than or equal to N-1;
s50, fixing the X-stage anchor bolt with the X-stage blind hole.
10. The method of securing according to claim 9, wherein: in the step S10, a bottom expanding for fixing is formed at the bottom end of each level of blind hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910753528.9A CN110594259B (en) | 2019-08-15 | 2019-08-15 | Multistage anchor bolt and fixing method thereof |
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| CN201910753528.9A CN110594259B (en) | 2019-08-15 | 2019-08-15 | Multistage anchor bolt and fixing method thereof |
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| CN110594259A CN110594259A (en) | 2019-12-20 |
| CN110594259B true CN110594259B (en) | 2024-06-07 |
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| CN201910753528.9A Active CN110594259B (en) | 2019-08-15 | 2019-08-15 | Multistage anchor bolt and fixing method thereof |
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| CN111255493B (en) * | 2020-02-18 | 2021-11-02 | 太原理工大学 | Connectable extension anchor rod capable of achieving segmented anchoring and mounting device thereof |
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| CN110594259A (en) | 2019-12-20 |
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