CN111088795B - High-resistance anchoring device suitable for two-section type stepped anchor hole - Google Patents
High-resistance anchoring device suitable for two-section type stepped anchor hole Download PDFInfo
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- CN111088795B CN111088795B CN201911387010.4A CN201911387010A CN111088795B CN 111088795 B CN111088795 B CN 111088795B CN 201911387010 A CN201911387010 A CN 201911387010A CN 111088795 B CN111088795 B CN 111088795B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 241
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000011440 grout Substances 0.000 claims description 46
- 238000005056 compaction Methods 0.000 claims description 29
- 239000004033 plastic Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 26
- 239000002689 soil Substances 0.000 abstract description 15
- 230000009286 beneficial effect Effects 0.000 abstract description 13
- 230000001965 increasing effect Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 7
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 description 10
- 239000007787 solid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010008 shearing Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000035515 penetration Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a high-resistance anchoring device suitable for a two-section type stepped anchor hole, which comprises a tubular anchor rod body, a grouting pipe and an anchor head, wherein the grouting pipe is arranged in the anchor rod body in a penetrating manner; the anchor rod body comprises an anchoring section and a free section; the anchoring section comprises a first anchoring section and a second anchoring section which are communicated with each other; the anchor head is connected to the end, far away from the free section, of the grouting pipe; the second anchoring section comprises at least two anchoring sections, and an anchoring framework II which is used for transversely expanding to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole II is formed between every two adjacent frameworks of the anchoring framework II; the anchor head is connected to the end, far away from the free section, of the grouting pipe, and a multi-cavity structure with collapse energy absorption function is arranged inside the anchor head; the anchor rod is beneficial to increasing the tensile strength of the anchor rod structure, improving the permeability and the combination degree of concrete and a soil layer or a rock stratum during grouting, improving the combination degree of the concrete structure after solidification and enhancing the integral stability and the tensile strength.
Description
Technical Field
The invention relates to the field of slope protection, in particular to a high-resistance anchoring device suitable for a two-section type stepped anchor hole.
Background
The anchor rod is one of the most important devices in civil construction and is commonly used for reinforcing side slopes and roadways. The anchor rod is divided into an anchoring section and a free section, wherein the anchoring section is buried in the ground layer and has the function of bearing axial tension through grouting.
In the existing structure, in order to increase the pulling force between the anchor rod and the stratum, the outer side wall of the anchor rod is usually provided with threads, but the structure still has the defects of insufficient tensile strength and low bonding degree with a cured concrete structure, so that the anchor rod is easy to loosen, the reinforced structure is unstable, and the stability of the whole stratum or rock stratum is influenced; meanwhile, because the concrete is naturally condensed in the traditional grouting technology and is not compacted, the strength of the cured concrete structure is not high, and the permeability and the combination degree of the cured concrete structure and a soil layer or a rock stratum are not high.
Based on the above problems, the invention provides a high-resistance anchoring device suitable for a two-section type stepped anchor hole. The high-resistance anchoring device suitable for the two-section stepped anchor hole is beneficial to increasing the structural tensile strength of the anchor rod, improving the permeability and the combination degree of concrete and a soil layer or a rock stratum during grouting, improving the combination degree of the concrete and a cured concrete structure and enhancing the integral stability and the tensile strength of the anchor rod; meanwhile, the energy absorption and vibration reduction are facilitated, and the service durability of the anchoring device is improved.
Disclosure of Invention
In view of the above, the high-resistance anchoring device suitable for the two-section stepped anchor hole provided by the invention is beneficial to increasing the structural tensile strength of the anchor rod, improving the permeability and the bonding degree of concrete and a soil layer or a rock stratum during grouting, improving the bonding degree of the concrete structure after solidification, and enhancing the overall stability and the tensile strength of the anchor rod; meanwhile, the energy absorption and vibration reduction are facilitated, and the service durability of the anchoring device is improved.
The invention relates to a high-resistance anchoring device suitable for a two-section type stepped anchor hole, which comprises a tubular anchor rod body, a grouting pipe and an anchor head, wherein the grouting pipe and the anchor head are arranged in the anchor rod body in a penetrating manner; the anchor rod body comprises an anchoring section and a free section; the anchoring section comprises a first anchoring section and a second anchoring section which are communicated with each other; the second anchoring section comprises at least two anchoring sections, and an anchoring framework II which is used for transversely expanding to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole II for slurry to flow into the anchor hole is formed between every two adjacent frameworks of the anchoring framework II; the grouting pipe is provided with a grout discharging hole opposite to the strip-shaped holes II at the position corresponding to the anchoring framework II; a compaction piece I is arranged between the first anchoring section and the second anchoring section and is positioned in an outer anchoring hole for accommodating the first anchoring section; the joint of the outer anchor hole and the inner anchor hole for accommodating the second anchoring section forms a step, and the compaction piece I moves to the step when being compressed; preferably, the compacting member I gradually comes into abutment against said step when pressed; the anchoring section of the second anchoring section and the anchoring framework II can be integrally formed or can be separately arranged and assembled so as to ensure that the anchoring framework II transversely expands to form radial deformation with the outer diameter smaller than the inner diameter of the anchoring hole and form a supporting framework when being pressed; the anchor rod body is of a tubular structure and is internally provided with a grouting pipe, so that grout entering the grouting pipe can enter a plurality of strip-shaped holes II opposite to a plurality of grout discharging holes after passing through the plurality of grout discharging holes and then enter the inner anchor hole, and grouting is facilitated; in actual operation, an operator firstly grouts the inner anchor pipe through the outer end of the grouting pipe, grout (such as cement slurry) enters the strip-shaped holes II of the anchor framework II through the plurality of grout discharge holes of the grouting pipe and then flows into the inner anchor hole to fill the inner anchor hole, then the outer end of the anchor rod body is pressed to enable the anchor framework II to transversely expand (transversely expand towards the direction perpendicular to the length direction of the anchor rod body) to form radial deformation with the outer diameter smaller than the inner diameter of the inner anchor hole and form a lantern shape, and meanwhile, the compaction piece I is pressed to the step and preferably pressed to be mutually supported, so that the grout existing in a gap between the compaction piece I and the step is extruded by the compaction piece I to enter the inner anchor hole, and the density and the compaction degree of the grout in the inner anchor hole are increased, the lantern-shaped anchoring framework II also serves as a supporting framework of the cured concrete structure, so that the structural strength and the shearing resistance of the cured concrete structure are improved, meanwhile, radial pressure which is radially expanded along the circumferential direction of the anchor rod body can be generated in the process that the anchoring framework II is plastically deformed to form the lantern shape, the penetration speed of the grout and the rock stratum or the soil layer is accelerated, and the combination degree of the grout and the rock stratum or the soil layer is greatly improved when the grout is solidified into the solid concrete; the anchoring frameworks II are arranged at intervals along the length direction of the anchor rod body, so that the combination degree and the structural strength of the anchor rod body and the solidified concrete are further improved; preferably, the anchoring frameworks II are arranged at intervals along the length direction of the second anchoring section, so that the combination degree and the structural strength of the anchor rod body and the solidified concrete are further increased; the grouting pipe is made of high-strength materials, so that the overall structural strength and the shearing resistance are improved; outer here means the side of the free section remote from the anchored section;
the anchor head is connected to the end, far away from the free section, of the grouting pipe; a multi-cavity structure with a collapsing energy-absorbing function is arranged in the anchor head; preferably, the multi-cavity structure is arranged side by side along the insertion direction of the anchor head and forms a labyrinth cavity structure, so that energy absorption and vibration reduction are facilitated, and the service durability of the anchoring device is improved; the multi-cavity structure with the crumpling energy absorption function is arranged so as to be beneficial to energy absorption and vibration reduction at the anchor head on the basis of ensuring the structural strength of the anchor head, and thus the structural strength and the shearing resistance of the structure, particularly a solidified concrete structure, are favorably improved.
Further, the outer edges of the anchoring frameworks II close to the two ends in the length direction are subjected to circular cutting to enable the frameworks to form notch parts I, and the outer edges of the middle parts of the frameworks are subjected to circular cutting to enable the outer edges of the middle parts of the frameworks to form notch parts II; the width of the notch part I is larger than that of the notch part II; the width refers to the size of the notch part I and the notch part II along the length direction of the anchor rod body; the notch depth of the notch part II is greater than that of the notch part I; the stress weak points are formed at the two ends and the middle part (preferably the middle position along the length direction) of the anchoring framework II along the length direction, particularly the stress weak points are formed at the middle part, so that when the outer end of the anchor rod body is pressed, each framework of the anchoring framework II can be transversely expanded and deformed, the anchoring framework II can be formed into a lantern shape under the external force, the firm combination between the whole anchor rod body and the stratum or rock stratum after the slurry is solidified into the solid concrete can be facilitated, the anchor rod body becomes a supporting framework of a solidified concrete structure, and the structural strength and the shear resistance of the solidified concrete structure can be improved;
further, the first anchoring section comprises at least two anchoring sections, and an anchoring framework I which is used for transversely expanding to form an anchoring framework I with the outer diameter smaller than the inner diameter of the outer anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole I for slurry to flow into the outer anchor hole is formed between every two adjacent frameworks of the anchoring framework I; the grouting pipe is provided with a plurality of grout discharging holes opposite to the strip-shaped holes I at the position corresponding to the anchoring framework I; the arrangement of the anchoring framework I and the strip-shaped holes I of the first anchoring section is favorable for realizing grouting at the first anchoring section and the transverse expansion of the anchoring framework I of the first anchoring section when pressure is applied to form a supporting framework with the outer diameter smaller than the inner diameter of the outer anchoring hole and form a lantern shape, preferably, after the grouting of the second anchoring section, the grouting is carried out on the first anchoring section, then, the pressure along the length direction is applied to the anchor rod body, so that the compacting piece I presses the annular step and the anchoring framework II expands into the lantern shape, in the process, the grouting can be continuously carried out on the outer anchoring hole while the anchoring framework I expands, thereby being favorable for compacting and firm combination of the second anchoring section, simultaneously being favorable for the filling and firm combination of the first anchoring section, further being favorable for the firm combination between the whole anchor rod body and the stratum or rock stratum after the grout is solidified into solid concrete, and being favorable for the vibration of an anchored area, the anchoring stability can be ensured, and the binding degree between the anchor rod body and the stratum or rock stratum is effectively improved; preferably, the anchoring frameworks I are arranged at intervals along the length direction of the first anchoring section, so that the combination degree and the structural strength of the anchor rod body and the solidified concrete are further increased;
further, the outer edges of the anchoring frameworks I close to the two ends in the length direction are subjected to circular cutting to enable the frameworks to form notch parts III, and the outer edges of the middle parts of the frameworks are subjected to circular cutting to enable the outer edges of the middle parts of the frameworks to form notch parts IV; the width of the notch part III is larger than that of the notch part IV; the width refers to the size of the notch part III and the notch part IV along the length direction of the anchor rod body; the notch depth of the notch part IV is greater than that of the notch part III; the stress weak points are formed at the two ends and the middle part (preferably the middle position along the length direction) of the anchoring framework I along the length direction, particularly the stress weak points are formed at the middle part, so that when the outer end of the anchor rod body is pressed, each framework of the anchoring framework I can be transversely expanded and deformed, the anchoring framework I can be formed into a lantern shape under the action of external force, the firm combination between the whole anchor rod body and a stratum or a rock stratum after the slurry is solidified into solid concrete can be facilitated, the anchor rod body becomes a supporting framework of a solidified concrete structure, and the structural strength and the shearing resistance of the solidified concrete structure can be further facilitated to be improved;
further, the first anchoring section is rotationally connected with the compacting piece I; opening or sealing a plurality of strip-shaped holes I arranged on the anchoring framework I; the second anchoring section is fixedly connected with the compacting piece I; the grouting device is favorable for avoiding that grout flows out along the plurality of strip-shaped holes I of the anchoring framework I of the first anchoring section when the internal anchor hole is grouted so as to be incapable of smoothly grouting the internal anchor hole, and during actual operation, an operator can rotate the first anchoring section to plug the plurality of strip-shaped holes I, if the grouting device is arranged on the grouting device, a structure for plugging or staggering the plurality of strip-shaped holes I when the first anchoring section rotates can be formed, specifically, the plurality of strip-shaped holes I and the plurality of grout discharge holes form staggering to realize plugging, so that the grouting device is favorable for avoiding that grout flows out along the plurality of strip-shaped holes I of the anchoring framework I of the first anchoring section so as to be incapable of smoothly grouting the internal anchor hole, and after the smooth grouting of the internal anchor hole is finished, the first anchoring section is rotated again to enable the plurality of strip-shaped holes I to form an open state, so that the external anchor hole is grouted; the grouting of the second anchoring section and the first anchoring section is facilitated; the permeability and the combination degree of the concrete and a soil layer or a rock stratum during grouting of the second anchoring section and the first anchoring section are improved, the combination degree of the concrete and a cured concrete structure is improved, and the overall stability of the concrete is enhanced;
further, the length directions of the strip-shaped holes I and the strip-shaped holes II are parallel to the length direction of the anchor rod body; the anchoring framework I and the anchoring framework II are favorable for plastic deformation when stressed and can be transversely expanded to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding part and form a lantern shape, the penetration speed of slurry and a stratum or a soil layer is favorably accelerated, the supporting framework of a solidified concrete structure is favorably formed, and the firm combination between the supporting framework and the stratum or the stratum is favorably improved;
furthermore, the plurality of grout discharging holes are arranged along the circumferential direction and the length direction of the grout pipe; the grouting pipe is provided with a plurality of grouting holes along the circumferential direction and the length direction corresponding to the anchoring frameworks I and II, so that grouting is facilitated, and grouting efficiency is improved; the anchor head is fixedly connected with the end part of the grouting pipe to form sealing; preferably, the anchor head is pyramid-shaped or spiral, so that the anchor rod body can be better inserted into the anchor hole and can be firmly combined with a rock stratum or a soil layer;
furthermore, a compaction piece II for plugging an external anchor hole during grouting is arranged at the joint of the anchoring section and the free section; when the annular compaction piece II is not subjected to axial force, a certain distance is reserved between the annular compaction piece II and the outer anchor orifice, and when the annular compaction piece II is subjected to axial force and forms a lantern shape along with plastic deformation of the anchor framework II and the anchor framework I, the compaction piece II can approach the outer anchor orifice until the outer anchor orifice is abutted, so that the outer anchor orifice is blocked, the outflow of grout near the outer anchor orifice is avoided, and the density and the compaction degree of grout in the outer anchor orifice are increased;
further, the anchoring section is provided with an external thread; the grouting is facilitated, the increase of the bonding degree of the anchor rod body and the solidified concrete is facilitated, and the pulling resistance is improved; the anchor rod body is made of plastic materials; the selection of the plastic material of the anchor rod body belongs to the prior art, such as a modified epoxy resin material with certain plasticity and the like, and is not described herein again; the plastic deformation of the anchoring framework I and the anchoring framework II is facilitated when the anchoring frameworks I and the anchoring frameworks II are stressed, and the influence on the structural strength of the anchoring frameworks I and the anchoring frameworks II due to the fracture of the brittleness of the material in the compression process is avoided;
further, the anchor rod further comprises a mounting device, wherein the mounting device is used for applying axial force to the anchor rod body; do benefit to the performance of the anchor skeleton I of the first anchor section of stock body and the anchor skeleton II effect of second anchor section reaches the performance of shutoff, the compaction effect of compaction piece I and compaction piece II to interior anchor hole section and outer anchor hole section when doing benefit to the grout, does benefit to simultaneously and installs this anchor device through applying the axial thrust along stock body length direction.
The invention has the beneficial effects that: according to the high-resistance anchoring device suitable for the two-section stepped anchor hole, due to the two-section arrangement of the first anchoring section and the second anchoring section of the anchor rod body, the arrangement of the compaction piece I between the first anchoring section and the second anchoring section and the multi-cavity structure arrangement of the anchor head, sequential grouting of the second anchoring section and the first anchoring section is favorably formed, the density and the compaction degree of grout in the inner anchor hole are favorably increased, the structural tensile strength of the anchor rod and the bonding degree with a cured concrete structure are favorably increased, the permeability and the bonding degree of concrete and a soil layer or a rock stratum during grouting are favorably improved, and the integral stability and the tensile strength of the anchor rod are favorably enhanced.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention (after the anchoring framework is subjected to plastic deformation);
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the anchor head construction of the present invention;
FIG. 4 is a schematic structural view of an anchoring framework I of the present invention;
fig. 5 is a schematic structural view of the anchoring framework II of the invention.
Detailed Description
As shown in the figure: the high-resistance anchoring device suitable for the two-section stepped anchor hole comprises a tubular anchor rod body 1, a grouting pipe 5 and an anchor head 6, wherein the grouting pipe 5 and the anchor head 6 are arranged in the anchor rod body 1 in a penetrating mode; the anchor rod body 1 comprises an anchoring section and a free section 4; the anchoring section comprises a first anchoring section 2 and a second anchoring section 3 which are communicated with each other; the second anchoring section 3 comprises at least two anchoring sections, and an anchoring framework II31 used for transversely expanding to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole II311 used for enabling slurry to flow into an anchor hole is formed between every two adjacent frameworks of the anchoring framework II 31; the grouting pipe 5 is provided with a grout discharging hole 51 corresponding to the plurality of strip-shaped holes II311 at the position corresponding to the anchoring framework II 31; a compacting piece I9 is arranged between the first anchoring section 2 and the second anchoring section 3, and the compacting piece I9 is positioned in the outer anchoring hole 7 for accommodating the first anchoring section 2; the joint of the outer anchor hole 7 and the inner anchor hole 8 for accommodating the second anchoring section 3 forms a step 78, and the compaction piece I9 moves to the step 78 when being compressed; preferably, the compacting means I9 gradually comes into abutment against said step 78 when pressed; the anchoring section of the second anchoring section 3 and the anchoring framework II31 can be integrally formed, or can be separately arranged and assembled, so that the anchoring framework II31 can be transversely expanded to form radial deformation with the outer diameter smaller than the inner diameter of the anchoring hole and form a supporting framework when the anchoring framework is pressed; the anchor rod body 1 is of a tubular structure and is internally provided with a grouting pipe 5, so that grout entering the grouting pipe 5 can enter a plurality of strip-shaped holes II311 opposite to a plurality of grout discharge holes 51 after passing through the plurality of grout discharge holes 51 and then enter an inner anchor hole 8, and grouting is facilitated; in practical operation, an operator firstly grouts the inner anchor hole 8 for accommodating the second anchor section 3 through the outer end of the grouting pipe 5, grout (such as cement paste) enters the strip-shaped holes II311 of the anchor framework II31 through the plurality of grout discharge holes 51 of the grouting pipe 5, then flows into the inner anchor hole 8 and fills the inner anchor hole 8, and then presses the outer end of the anchor rod body 1 to transversely expand the anchor framework II31 (transversely expand towards the direction perpendicular to the length direction of the anchor rod body 1) to form radial deformation with the outer diameter smaller than the inner diameter of the inner anchor hole 8 and form a lantern shape, and meanwhile, the compacting pieces I9 are also pressed to the step 78, preferably pressed against each other, so that the grout existing in a gap between the compacting pieces I9 and the step 78 is extruded into the inner anchor hole 8 by the compacting pieces I9, thereby increasing the density and the compactness of the grout in the inner anchor hole 8, being beneficial to the firm combination between the whole anchor rod body 1 and the stratum or the rock stratum after the grout is solidified into solid concrete, and even if the anchored area vibrates, the anchoring stability can be ensured, the combination degree between the anchor rod body 1 and the ground layer or rock stratum can be effectively promoted, the lantern-shaped anchoring framework II31 also serves as a supporting framework of the cured concrete structure, so that the structural strength and the shear resistance of the cured concrete structure are improved, meanwhile, radial pressure which is radially expanded along the circumferential direction of the anchor rod body 1 can be generated in the process that the anchoring framework II31 is subjected to plastic deformation to form a lantern shape, so that the penetration speed of the grout and the rock stratum or the soil layer is favorably accelerated, and the bonding degree of the grout and the rock stratum or the soil layer is favorably greatly improved when the grout is solidified into solid concrete; the anchoring frameworks II31 are arranged at intervals along the length direction of the anchor rod body 1, so that the combination degree and the structural strength of the anchor rod body 1 and the solidified concrete are further improved; the grouting pipe 5 is made of high-strength materials, so that the overall structural strength and the shear resistance are improved; outer here means the side of the free section 4 remote from the anchored section;
the anchor head 6 is connected to the end, far away from the free section 4, of the grouting pipe 5; a multi-cavity structure with a collapsing energy-absorbing function is arranged in the anchor head 6; preferably, the multi-cavity structure is a labyrinth cavity structure arranged along the insertion direction of the anchor head 6, so that energy absorption and vibration reduction are facilitated, and the service durability of the anchoring device is improved; the multi-cavity structure with the crumpling energy absorption function is favorable for energy absorption and vibration reduction at the position of the anchor head 6 on the basis of ensuring the structural strength of the anchor head 6, so that the structural strength and the shearing resistance of the structure, particularly a solidified concrete structure, are favorably improved.
In this embodiment, the outer edges of the anchoring frameworks II31 near the two ends in the length direction are circularly cut to form a notch I313 on each framework, and the middle outer edge is circularly cut to form a notch II312 on the middle outer edge of each framework; the width of the notch part I313 is greater than that of the notch part II 312; the width here refers to the dimension of the notch I313 and the notch II312 along the length direction of the anchor body 1; the notch depth of the notch part II312 is greater than that of the notch part I313; the stress weak points are favorably formed at the two ends and the middle part (preferably the middle position along the length direction) of the anchoring framework II31 along the length direction, particularly the stress weak points are formed at the middle part, so that when the outer end of the anchor rod body 1 is pressed, each framework of the anchoring framework II31 can be transversely expanded and deformed, the anchoring framework II31 can be favorably formed into a lantern shape under external force, the firm combination between the whole anchor rod body 1 and the stratum or rock stratum after the slurry is solidified into solid concrete can be favorably realized, the supporting framework of the solidified concrete structure can be realized, and the structural strength and the shearing resistance of the solidified concrete structure can be improved.
In this embodiment, the first anchoring section 2 includes at least two anchoring sections, and an anchoring framework I21 for transversely expanding to form an anchoring framework with an outer diameter smaller than the inner diameter of the outer anchoring hole 7 when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole I211 for slurry to flow into the outer anchor hole 7 is formed between every two adjacent frameworks of the anchoring framework I21; the grouting pipe 5 is provided with a grout discharging hole 51 corresponding to the plurality of strip-shaped holes I211 at the position corresponding to the anchoring framework I21; the arrangement of the anchoring framework I21 and the strip-shaped holes I211 of the first anchoring section 2 is beneficial to realizing grouting at the first anchoring section 2 and the transverse expansion of the anchoring framework I21 of the first anchoring section 2 to form a supporting framework with the outer diameter smaller than the inner diameter of the outer anchoring hole and form a lantern shape when pressure is applied to the anchoring framework I3578, preferably, after the second anchoring section 3 is grouted, the first anchoring section 2 is grouted, then, pressure along the length direction is applied to the anchor rod body 1, so that the compacting piece I9 is pressed to the annular step 78 and the anchoring framework II31 is expanded to form the lantern shape, in the process, the grouting can be continuously carried out on the outer anchoring hole 7 while the anchoring framework I21 is expanded, thereby being beneficial to the compaction and firm combination of the second anchoring section 3, being beneficial to the full-up and firm combination of the first anchoring section 2, and being further beneficial to the firm combination between the whole anchor rod body 1 and the ground layer or rock layer after the grout is solidified into solid concrete, the anchoring stability can be ensured even if the anchored area vibrates, and the bonding degree between the anchor rod body 1 and the stratum or rock stratum is effectively improved; preferably anchor skeleton I21 is for following a plurality of the first 2 length direction intervals of anchor section set up, further do benefit to and increase the associativity and the structural strength of the anchor rod body 1 with the concrete after the solidification.
In this embodiment, the outer edges of the anchoring frameworks I21 near the two ends in the length direction are circularly cut to form a notch portion III213 on each framework, and the middle outer edge is circularly cut to form a notch portion IV212 on the middle outer edge of each framework; the width of the notch portion III213 is greater than the width of the notch portion IV 212; the width here refers to the dimension of the notch portion III213 and the notch portion IV212 in the longitudinal direction of the anchor body 1; the notch depth of the notch portion IV212 is larger than that of the notch portion III 213; the stress weak points are formed at the two ends and the middle part (preferably the middle position along the length direction) of the anchoring framework I21, particularly the stress weak points are formed at the middle part, so that when the outer end of the anchor rod body 1 is pressed, each framework of the anchoring framework I21 can be transversely expanded and deformed, the anchoring framework I21 can be formed into a lantern shape under the action of external force, the firm combination between the whole anchor rod body 1 and the stratum or rock stratum after the slurry is solidified into the solid concrete is facilitated, the supporting framework of the solidified concrete structure is formed, and the structural strength and the shearing resistance of the solidified concrete structure are further facilitated to be improved.
In this embodiment, the first anchoring section 2 is rotatably connected to the compression piece I9; the opening or the sealing of a plurality of strip-shaped holes I211 arranged on the anchoring framework I21 is facilitated; the second anchoring section 3 is fixedly connected with the compaction piece I9; the grouting method is beneficial to avoiding that grout flows out along the plurality of strip-shaped holes I211 of the anchoring framework I21 of the first anchoring section 2 when the inner anchor holes 8 are grouted, so that the inner anchor holes 8 cannot be grouted smoothly, in the actual operation process, an operator can rotate the first anchoring section 2 to plug the plurality of strip-shaped holes I211, if the grouting method is arranged on the first anchoring section 2, a plugging or staggered plugging structure can be formed for the plurality of strip-shaped holes I211, specifically, the plurality of strip-shaped holes I211 and the plurality of grout discharge holes 51 are staggered to realize plugging, so that the grouting method is beneficial to avoiding that grout flows out along the plurality of strip-shaped holes I211 of the anchoring framework I21 of the first anchoring section 2 to stop grouting the inner anchor holes 8 smoothly, and after the inner anchor holes 8 are grouted smoothly, the first anchoring section 2 is rotated again to enable the plurality of strip-shaped holes I211 to form an open state, so that the outer anchor holes 7 are grouted again; the grouting of the second anchoring section 3 and the first anchoring section 2 is facilitated; the permeability and the combination degree of the concrete and a soil layer or a rock stratum during grouting of the second anchoring section 3 and the first anchoring section 2 are improved, the combination degree of the concrete structure after solidification is improved, and the overall stability of the concrete structure is improved.
In this embodiment, the length directions of the plurality of strip-shaped holes I211 and the plurality of strip-shaped holes II311 are parallel to the length direction of the anchor rod body 1; the anchoring framework I21 and the anchoring framework II31 are favorable for plastic deformation when stressed and can be transversely expanded to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding part and form a lantern shape, the penetration speed of grout and rock strata or soil layers is favorably accelerated, the supporting framework of a cured concrete structure is favorably formed, and the firm combination between the supporting framework and the ground strata or rock strata is favorably improved.
In this embodiment, the grout outlet 51 is arranged in a plurality along the circumferential direction and the length direction of the grout pipe 5; the grouting pipe 5 is provided with a plurality of grouting holes 51 corresponding to the anchoring frameworks I21 and II31 along the circumferential direction and the length direction, so that grouting is facilitated, and grouting efficiency is improved; the anchor head 6 is fixedly connected with the end part of the grouting pipe 5 to form sealing; preferably, the anchor head 6 is pyramid-shaped or spiral, which is beneficial to the anchor rod body 1 to be better inserted into an anchor hole and form firm combination with a rock stratum or a soil layer.
In the embodiment, a compaction piece II10 for forming a plug for an external anchor hole during grouting is arranged at the joint of the anchoring section and the free section 4; annular compaction piece II10 is when not receiving along length direction's thrust, it has a certain distance with outer anchor drill way to when receiving along length direction's thrust, when taking place plastic deformation formation lantern form along anchor skeleton II31 and anchor skeleton I21, compaction piece II10 can be close to until forming the support to outer anchor drill way along with outside anchor eye 7, form the shutoff to outer anchor drill way, not only do benefit to and avoid near the thick liquid outflow of outer anchor drill way, more do benefit to the density and the compaction degree of thick liquid in the outer anchor eye 7 of increase.
In this embodiment, the anchoring section is provided with an external thread; the grouting is facilitated, the increase of the bonding degree of the anchor rod body 1 and the solidified concrete is facilitated, and the pulling resistance is improved; the anchor rod body 1 is made of a plastic material; the selection of the plastic material of the anchor rod body 1 belongs to the prior art, such as a modified epoxy resin material with certain plasticity, and the like, which is not described herein again; the plastic deformation of the anchoring framework I21 and the anchoring framework II31 under stress is facilitated, and the influence on the structural strength of the material due to the fracture of the material in the compression process is avoided.
In the embodiment, the anchor rod further comprises a mounting device, wherein the mounting device is used for applying axial force to the anchor rod body 1; the anchoring framework I21 of the first anchoring section 2 and the anchoring framework II31 of the second anchoring section 3 of the anchor rod body 1 are favorably exerted, the plugging and compacting effects of the compacting piece I9 and the compacting piece II10 on the inner anchor hole section and the outer anchor hole section during grouting are favorably exerted, and the installation of the anchoring device is favorably realized by applying axial pushing force along the length direction of the anchor rod body; the mounting means are not shown in the figures.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. The utility model provides a high resistance type anchor suitable for two segmentation echelonment anchor eyes which characterized in that: the anchor rod comprises a tubular anchor rod body, a grouting pipe and an anchor head, wherein the grouting pipe and the anchor head are arranged in the anchor rod body in a penetrating manner; the anchor rod body comprises an anchoring section and a free section; the anchoring section comprises a first anchoring section and a second anchoring section which are communicated with each other; the second anchoring section comprises at least two anchoring sections, and an anchoring framework II which is used for transversely expanding to form an anchoring hole with an outer diameter smaller than the inner diameter of the corresponding anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole II for slurry to flow into the anchor hole is formed between every two adjacent frameworks of the anchoring framework II; the grouting pipe is provided with a grout discharging hole opposite to the strip-shaped holes II at the position corresponding to the anchoring framework II; a compaction piece I is arranged between the first anchoring section and the second anchoring section and is positioned in an outer anchoring hole for accommodating the first anchoring section; the joint of the outer anchor hole and the inner anchor hole for accommodating the second anchoring section forms a step, and the compaction piece I moves to the step when being compressed; the anchor head is connected to the end, far away from the free section, of the grouting pipe; a multi-cavity structure with a collapsing energy-absorbing function is arranged in the anchor head; the multi-cavity structure is a labyrinth cavity structure arranged along the insertion direction of the anchor head; the outer edges of the anchoring frameworks II close to the two ends in the length direction are subjected to circular cutting to enable the frameworks to form notch parts I, and the outer edges of the middle parts of the frameworks are subjected to circular cutting to enable the outer edges of the middle parts of the frameworks to form notch parts II; the width of the notch part I is larger than that of the notch part II; the notch depth of the notch part II is greater than that of the notch part I; the first anchoring section comprises at least two anchoring sections, and an anchoring framework I used for transversely expanding to form an anchoring framework I with the outer diameter smaller than the inner diameter of the outer anchoring hole when being pressed is arranged between the adjacent anchoring sections; a strip-shaped hole I for slurry to flow into the anchor hole is formed between every two adjacent frameworks of the anchoring framework I; the grouting pipe is provided with a plurality of grout discharging holes opposite to the strip-shaped holes I at the position corresponding to the anchoring framework I; the outer edges of the anchoring frameworks I close to the two ends in the length direction are subjected to circular cutting to enable the frameworks to form notch parts III, and the outer edges of the middle parts of the frameworks are subjected to circular cutting to enable the outer edges of the middle parts of the frameworks to form notch parts IV; the width of the notch part III is larger than that of the notch part IV; the notch depth of the notch part IV is greater than that of the notch part III; the first anchoring section is rotationally connected with the compaction piece I, and the second anchoring section is fixedly connected with the compaction piece I; and a compaction piece II for plugging the outer end of the outer anchor hole during grouting is arranged at the joint of the anchoring section and the free section.
2. The high-resistance anchoring device for the two-stage stepped anchor hole according to claim 1, wherein: the length direction of a plurality of bar holes I and a plurality of bar holes II is parallel with the length direction of stock body.
3. The high-resistance anchoring device for the two-stage stepped anchor hole according to claim 1, wherein: the grout discharging holes are arranged along the circumferential direction and the length direction of the grout pipe; the anchor head is fixedly connected with the end part of the grouting pipe and forms sealing.
4. The high-resistance anchoring device for the two-stage stepped anchor hole according to claim 1, wherein: the anchoring section is provided with an external thread; the anchor rod body is made of plastic materials.
5. The high-resistance anchoring device for the two-stage stepped anchor hole according to claim 1, wherein: the anchor rod further comprises a mounting device, and the mounting device is used for applying axial force to the anchor rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387010.4A CN111088795B (en) | 2019-12-29 | 2019-12-29 | High-resistance anchoring device suitable for two-section type stepped anchor hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387010.4A CN111088795B (en) | 2019-12-29 | 2019-12-29 | High-resistance anchoring device suitable for two-section type stepped anchor hole |
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| Publication Number | Publication Date |
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| CN111088795A CN111088795A (en) | 2020-05-01 |
| CN111088795B true CN111088795B (en) | 2021-08-27 |
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| CN201911387010.4A Expired - Fee Related CN111088795B (en) | 2019-12-29 | 2019-12-29 | High-resistance anchoring device suitable for two-section type stepped anchor hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111691420B (en) * | 2020-06-22 | 2021-08-03 | 福建省华策建设集团有限公司 | Construction method of PHC tubular pile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581226A (en) * | 2009-06-10 | 2009-11-18 | 重庆交通大学 | Subsection anchor rod and anchoring method |
| JP2016142105A (en) * | 2015-02-04 | 2016-08-08 | 株式会社ケー・エフ・シー | Rock bolt material pipe |
| CN106759326A (en) * | 2016-12-14 | 2017-05-31 | 重庆大学 | A kind of Stress Control multistage opening type anchor pole and anchoring construction method |
| CN109057840A (en) * | 2018-08-20 | 2018-12-21 | 中钢集团马鞍山矿山研究院有限公司 | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress |
-
2019
- 2019-12-29 CN CN201911387010.4A patent/CN111088795B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581226A (en) * | 2009-06-10 | 2009-11-18 | 重庆交通大学 | Subsection anchor rod and anchoring method |
| JP2016142105A (en) * | 2015-02-04 | 2016-08-08 | 株式会社ケー・エフ・シー | Rock bolt material pipe |
| CN106759326A (en) * | 2016-12-14 | 2017-05-31 | 重庆大学 | A kind of Stress Control multistage opening type anchor pole and anchoring construction method |
| CN109057840A (en) * | 2018-08-20 | 2018-12-21 | 中钢集团马鞍山矿山研究院有限公司 | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress |
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| CN111088795A (en) | 2020-05-01 |
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