CN217150213U - Stress and deformation coordination component between stress dispersion type anchor cable and steel strands - Google Patents
Stress and deformation coordination component between stress dispersion type anchor cable and steel strands Download PDFInfo
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- CN217150213U CN217150213U CN202220180135.0U CN202220180135U CN217150213U CN 217150213 U CN217150213 U CN 217150213U CN 202220180135 U CN202220180135 U CN 202220180135U CN 217150213 U CN217150213 U CN 217150213U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
A stress and deformation coordination component between stress dispersion type anchor cable steel strands comprises a cylindrical anchor ring, a closed bearing plate and an inner anchor ring; the cylindrical anchor ring is provided with at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring, and different cylindrical channels A are communicated through a transverse channel arranged on the cylindrical anchor ring; the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, a cylindrical channel B is arranged on the closed bearing plate, and the cylindrical channel penetrates through the closed bearing plate; an inner anchor ring is arranged in the cylindrical channel A and is positioned above the transverse channel, and pressure-bearing fluid is arranged in a closed space formed by the cylindrical anchor ring, the closed pressure-bearing plate and the inner anchor ring; the steel strand penetrates through the cylindrical channel B and the inner hole of the inner anchor ring, and a clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand; the tensile force borne by the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid among the cylindrical channels A, so that the effect of coordinating the stress and deformation of each steel strand is achieved.
Description
Technical Field
The invention relates to the technical field of rock and soil anchoring, in particular to a stress and deformation coordination member among stress dispersion type anchor cable steel strands.
Background
The anchor cable reinforcement is used as a common support mode and plays a very important role in the fields of tunnels, slopes and the like. However, conventional cables have a problem of stress concentration, and in order to overcome this problem and to improve the ultimate pullout resistance of the cable, researchers have developed tension dispersion cables and pressure dispersion cables.
The inner anchoring sections of the multiple groups of steel strands of the stress dispersion type anchor cable are respectively arranged at different depths of the rock body, so that the shearing force between the steel strands and the surrounding rock is uniformly distributed at different depths, and the grouting body of the anchoring sections is stressed uniformly. However, in a long-term working state, because the free sections of the steel strands are different, the surrounding rock deformation can cause uneven stress on the steel strands, and the shortest steel strand is stressed greatly and is easy to damage.
Disclosure of Invention
The invention aims to overcome the defects, and provides a stress and deformation coordination component among stress-dispersed anchor cable steel strands, which is used for adjusting the stress state of each steel strand, so that each steel strand is uniformly stressed, and the effect of coordinating the stress and deformation among the steel strands is achieved.
The invention solves the technical problem by adopting the scheme that a stress and deformation coordination component among stress dispersion type anchor cable steel strands comprises a cylindrical anchor ring, a closed bearing plate and an inner anchor ring;
the cylindrical anchor ring is provided with at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring, the cylindrical channels penetrate through the cylindrical anchor ring, and different cylindrical channels A are communicated through a transverse channel arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B which are arranged in one-to-one correspondence to the cylindrical channels A are formed in the closed bearing plate, and the cylindrical channels B penetrate through the closed bearing plate;
an inner anchor ring is arranged in the cylindrical channel A and is positioned above the transverse channel, pressure-bearing fluid is arranged in a closed space formed by the cylindrical anchor ring, the closed pressure-bearing plate and the inner anchor ring, and the liquid level of the pressure-bearing fluid is higher than that of the transverse channel;
the steel strand penetrates through the cylindrical channel B and the inner hole of the inner anchor ring, and a clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand.
Furthermore, the closed space is filled with an elastic bag, and the pressure-bearing fluid is arranged in the elastic bag.
Furthermore, the elastic bag comprises an annular columnar bag body and a fluid channel bag body, the shape and the number of the annular columnar bag body correspond to those of the columnar channels A, the fluid channel bag body corresponds to those of the transverse channels, threading holes are formed in the annular columnar bag body and correspond to the columnar channels A one to one, and the steel strands penetrate through the threading holes.
Furthermore, the inner hole, the threading hole and the cylindrical channel B of the inner anchor ring positioned at the same cylindrical channel A are corresponding to each other in the upper and lower positions to jointly form a reserved hole for the steel strand to pass through.
Furthermore, pressure-bearing buffer gas is or is not arranged in the elastic bag.
Compared with the prior art, the invention has the following beneficial effects: the anchor cable is simple in structure and reasonable in design, pressure-bearing fluid is arranged inside the anchor cable, the tension borne by the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid among the cylindrical channels A, the stress state of each steel strand is optimized, and the effect of coordinating the stress and deformation of each steel strand is achieved.
Drawings
The invention is further described with reference to the following figures.
Fig. 1 is a cross-sectional view of the coordinating member.
Fig. 2 is a schematic structural view of a cylindrical anchor ring.
Fig. 3 is a schematic structural view of the closed pressure bearing plate.
Fig. 4 is a schematic view of a sealed bladder.
Fig. 5 is a schematic structural view of the coordinating member.
In the figure: 1-clamping piece, 2-cylindrical anchor ring, 3-closed bearing plate, 4-inner anchor ring, 5-elastic bag, 6-bearing fluid, 7-cylindrical channel A, 8-cylindrical channel B and 9-transverse channel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-5, a stress distribution type coordination member for stress and deformation between anchor cables and steel strands comprises a cylindrical anchor ring 2, a closed bearing plate 3 and an inner anchor ring 4;
the cylindrical anchor ring is provided with at least two cylindrical channels A7 parallel to the axial direction of the cylindrical anchor ring, the cylindrical channels A penetrate through the cylindrical anchor ring, and different cylindrical channels A are communicated through a transverse channel 9 arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B8 which are arranged in one-to-one correspondence to the cylindrical channels A are formed in the closed bearing plate, the cylindrical channels B penetrate through the closed bearing plate, when the anchor cable is installed, the steel strand penetrates through the cylindrical channels B, and the diameter of the cylindrical channels B is matched with the outer diameter of the steel strand;
an inner anchor ring is arranged in the cylindrical channel A, the inner anchor ring is similar to an anchor ring of a single anchor cable, and the outer diameter of the inner anchor ring is adapted to the diameter of the cylindrical channel A; the inner anchor ring is positioned above the transverse channel, pressure-bearing fluid 6 is arranged in a closed space formed by the cylindrical anchor ring, the closed pressure-bearing plate and the inner anchor ring, and the liquid level of the pressure-bearing fluid is higher than that of the transverse channel;
the steel strand runs through the inner hole of the cylindrical channel B and the inner anchor ring, a clamping piece 1 is arranged between the inner hole of the inner anchor ring and the steel strand, and when the steel strand is subjected to tensile force, the inner anchor ring and the clamping piece act together to generate clamping force to fix the steel strand.
In the present embodiment, the closed space is filled with an elastic bag 5 in which a pressurized fluid is provided.
In this embodiment, the elastic bag includes annular cylindrical bag bodies whose shapes and numbers correspond to those of the cylindrical channels, and fluid channel bag bodies corresponding to the transverse channels, and has better elastic deformation performance; threading holes which are arranged in one-to-one correspondence with the cylindrical channels A are formed in the annular columnar bag body, the outer diameter of the annular columnar bag body, through which the steel strands penetrate, is matched with the inner diameter of the cylindrical channels A, and the inner diameter of the threading holes is matched with the outer diameter of the steel strands; the elastic bag is used for containing pressure-bearing fluid and preventing the pressure-bearing fluid from leaking to the outside when the pressure-bearing fluid is pressed.
In this embodiment, the inner hole, the threading hole, and the cylindrical passage B of the inner anchor ring located in the same cylindrical passage a correspond to each other in the vertical position to form a reserved hole for the steel strand to pass through.
In this embodiment, a pressurized buffer gas may or may not be provided within the elastomeric bladder.
In this embodiment, the transverse channel opens at the bottom of the cylindrical anchor ring.
In this embodiment, the closed pressure-bearing plate is shaped like a disk, and the cylindrical anchor ring is welded to the closed pressure-bearing plate, and the sealing bag is first installed in the cylindrical anchor ring and then welded.
In this embodiment, the cylindrical anchor ring is formed by drilling a hole in a cylindrical steel member.
When the installation is used: drilling holes at the designed supporting positions of the rock mass, and anchoring the inner ends of the anchor cable bundles in the drilled holes; penetrating steel strands into steel strand preformed holes in the coordination member, wherein the number of the steel strands is consistent with that of the steel strand preformed holes; the clamping piece is matched with the steel strand, the clamping piece is arranged between the inner hole of the inner anchor ring and the steel strand, the steel strand penetrates through the jack, and prestress is applied to the steel strand to meet the design requirement; and removing the jack after the pre-stress tensioning is finished, detecting the displacement coordination condition of each steel strand, cutting off redundant steel strands and sealing the anchor after the detection is qualified, and finishing the installation.
When prestress is applied, all steel strands in the anchor cable are simultaneously tensioned; when the existing stress dispersion type anchor cable is tensioned, different steel strands are tensioned with the same displacement, so that the stress states of the steel strands are different, and the prestress of the anchor cable is inconvenient to adjust.
The existing force dispersion type anchor cable is in a long-term working state, the stress of each steel strand is not uniform due to surrounding rock deformation, the strength of the anchor cable cannot be fully utilized, and the anchor cable is easy to damage.
After the coordination member is installed, when surrounding rock deformation causes one of the steel strands of the anchor cable to receive large tensile force, the coordination member can drive the inner anchor ring in the cylindrical channel where the steel strand is located to move towards the direction close to the closed bearing plate, under the action of force, the inner anchor ring and the closed bearing plate generate relative displacement, bearing fluid between the inner anchor ring and the closed bearing plate is extruded to the adjacent cylindrical channel A, correspondingly, the inner anchor ring of the adjacent cylindrical channel A can be pushed towards the direction far away from the closed bearing plate, the steel strand of the adjacent cylindrical channel A is in a tight state under the action of the thrust of the inner anchor ring, and the coordination of stress and deformation of the steel strand in the two adjacent cylindrical channels is realized.
The traditional anchorage device can not adjust the stress and deformation of the steel strands, but the coordination member is internally provided with pressure-bearing fluid, the tension borne by the anchor cable is uniformly distributed to each steel strand through the flow of the pressure-bearing fluid in each cylindrical passage A, the stress state of each steel strand is optimized, and the effect of coordinating the stress and deformation of each steel strand is achieved.
If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a stress and deformation coordination component between stress dispersion formula anchor rope steel strand wires which characterized in that: comprises a cylindrical anchor ring, a closed bearing plate and an inner anchor ring;
the cylindrical anchor ring is provided with at least two cylindrical channels A parallel to the axial direction of the cylindrical anchor ring, the cylindrical channels A penetrate through the cylindrical anchor ring, and different cylindrical channels A are communicated through a transverse channel arranged on the cylindrical anchor ring;
the closed bearing plate is arranged on the bottom surface of the cylindrical anchor ring, cylindrical channels B which are arranged in one-to-one correspondence to the cylindrical channels A are formed in the closed bearing plate, and the cylindrical channels B penetrate through the closed bearing plate;
an inner anchor ring is arranged in the cylindrical channel A and is positioned above the transverse channel, pressure-bearing fluid is arranged in a closed space formed by the cylindrical anchor ring, the closed pressure-bearing plate and the inner anchor ring, and the liquid level of the pressure-bearing fluid is higher than that of the transverse channel;
the steel strand penetrates through the cylindrical channel B and the inner hole of the inner anchor ring, and the inner anchor ring is connected with the steel strand.
2. The stress dispersion type anchor cable steel strand stress and deformation coordinating member of claim 1, wherein: the closed space is filled with an elastic bag, and the pressure-bearing fluid is arranged in the elastic bag.
3. The stress dispersion type anchor cable steel strand stress and deformation coordination member as claimed in claim 2, wherein: the elastic bag is provided with threading holes which are in one-to-one correspondence with the cylindrical channels A, and the steel strands penetrate through the threading holes.
4. The stress dispersion type anchor cable steel strand stress and deformation coordination member as claimed in claim 3, wherein: the inner hole, the threading hole and the cylindrical through B of the inner anchor ring positioned at the same cylindrical channel A correspond to each other in the upper and lower positions to jointly form a reserved hole for the steel strand to pass through.
5. The stress dispersion type anchor cable steel strand stress and deformation coordination member as claimed in claim 2, wherein: and a pressure-bearing buffer gas is or is not arranged in the elastic bag.
6. The stress dispersion type anchor cable steel strand stress and deformation coordination member as claimed in claim 1, wherein: and a tension connecting piece is arranged between the inner hole of the inner anchor ring and the steel strand, and when the steel strand is subjected to tension force, the inner anchor ring and the tension connecting piece act together to generate clamping force to fix the steel strand.
7. The stress dispersion type anchor cable steel strand stress and deformation coordination member as claimed in claim 6, wherein: the tension connecting piece is a clamping piece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220180135.0U CN217150213U (en) | 2022-01-24 | 2022-01-24 | Stress and deformation coordination component between stress dispersion type anchor cable and steel strands |
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| CN202220180135.0U CN217150213U (en) | 2022-01-24 | 2022-01-24 | Stress and deformation coordination component between stress dispersion type anchor cable and steel strands |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382078A (en) * | 2022-01-24 | 2022-04-22 | 福州大学 | Anchor cable bundle steel strand stress and deformation coordination member and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382078A (en) * | 2022-01-24 | 2022-04-22 | 福州大学 | Anchor cable bundle steel strand stress and deformation coordination member and use method thereof |
| CN114382078B (en) * | 2022-01-24 | 2024-01-30 | 福州大学 | Stress and deformation coordination component among anchor cable bundle steel strands and use method |
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