A new full-length bonded anchor cable and its use method

Abstract

The present invention relates to the technical field of tunnel anchor cable support, and in particular to a novel full-length adhesive anchor cable, comprising a steel wire and a grouting pipe, wherein the steel wire is arranged around the outer layer of the grouting pipe, the grouting pipe is provided with a slurry outlet, and the position of the steel wire near the slurry outlet is provided with a support member for propping the steel wire out of the slurry outlet, the support member is arranged between two adjacent steel wires, the side of the support member close to the grouting pipe is provided with an arc surface, the contact position between the support member and the steel wire is provided with a groove to prevent the support member from falling off, and the support member is provided with a rounded corner or chamfer near one end of the grouting pipe, which has good slurry discharge effect, low production cost, convenient processing, easy installation and maintenance, and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel anchor cable support, and in particular to a novel full-length adhesive anchor cable and a use method thereof. Background Art

[0002] Cable anchor support plays an important role in the support of mines, tunnels, and deep coal tunnels. Its main features are deep anchoring depth, high bearing capacity, and wide reinforcement range. It can apply a large preload force to achieve ideal support effects, making it the most reliable and effective surrounding rock reinforcement method. Cable anchor support applies a preload force to the surrounding rock by installing cables in the surrounding rock to form an anchor body. The preload force diffuses through the surrounding rock stress to form a support stress field. This preload force, acting together with the ground stress field, achieves the active support effect of the cables, thereby limiting surrounding rock deformation and maintaining surrounding rock stability.

[0003] Under relatively stable surrounding rock conditions, anchor cable support can achieve good results. However, under some harsh conditions such as loose and broken surrounding rock and soft developed surrounding rock, the preload of the anchor cable is difficult to effectively diffuse through the surrounding rock to form a stress field, and the support effect is not ideal. At the same time, since the anchor cable body is made of multiple twisted steel wires, shear stress fracture may occur when the surrounding rock deforms and slips during the support process, causing support failure and posing a safety hazard.

[0004] In the prior art, Chinese patent CN 110486064 A records a full-length adhesive anchor cable. During grouting, a slurry outlet needs to be provided for the anchor cable. The steel wire on the outside of the grouting pipe will have a certain impact on the grouting. Therefore, the steel wire is stretched at the position of the slurry outlet to leak out. The prior art generally records a method of stretching the outer steel wire by providing a circular support ring on the outside of the grouting pipe. However, during manufacture and installation, the support ring needs to be installed on the grouting pipe first and needs to be fixed. Deviations are likely to occur during the manufacture of the anchor cable, and the manufacture is inconvenient. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art and provide a new full-length adhesive anchor cable and a method for using the same.

[0006] The technical solution of the present invention is:

[0007] A new type of full-length bonded anchor cable includes a steel wire 1 and a grouting pipe 2. The steel wire 1 is arranged around the outer layer of the grouting pipe 2. The grouting pipe 2 is provided with a slurry outlet 3. The position of the steel wire 1 near the slurry outlet 3 is provided with a support member 4 for supporting the steel wire 1 to leak out of the slurry outlet 3.

[0008] The steel wire 1 is arranged around the outer layer of the grouting pipe 2, and the steel wire 1 is close to the grouting pipe 2. The grouting pipe 2 is evenly provided with slurry outlets 3, and the position and number of the slurry outlets 3 can be designed according to actual needs. A support member 4 is installed near the slurry outlet 3. The support member 4 is installed between two adjacent steel wires 1 and is clamped on the steel wire 1. The support member 4 can open the two adjacent steel wires 1, and the slurry outlet 3 on the grouting pipe 2 located in the middle of the steel wire 1 can be completely leaked, so that the slurry outlet 3 can be fully opened during grouting without causing clogging of the slurry outlet 3. Moreover, when setting the slurry outlet 3, the support member 4 can be installed first and then the slurry outlet 3 can be drilled out. After the support member 4 is installed, a suitable slurry outlet position can be selected on the grouting pipe 2 to drill a hole. Drilling the slurry outlet 3 can ensure that the slurry outlet 3 is completely leaked without affecting the grouting.

[0009] The grouting pipe 2 can be a corrugated pipe, or a steel pipe, a seamless steel pipe or a welded pipe.

[0010] As a preferred technical solution, the support member 4 is arranged between two adjacent steel wires 1 .

[0011] The number of steel wires 1 is designed according to actual needs. The steel wires 1 are wound and distributed around the outer layer of the central grouting pipe 2 in a circular pattern. The support member 4 is a conical structure, with the thin end of the support member 4 facing the grouting pipe 2. During installation, the support member 4 is pressed toward the grouting pipe 2 by external force, which opens a gap between two adjacent steel wires 2. The support member 4 is then inserted between the two adjacent steel wires 1. The squeezing force between the two opened steel wires 1 clamps the support member 4 in place, effectively preventing the support member 4 from sliding relative to the steel wires 1 during operation.

[0012] As a preferred technical solution, a side of the support member 4 close to the grouting pipe 2 is provided with a curved surface.

[0013] After the support member 4 is installed, it is clamped by two adjacent steel wires 1. A curved surface is provided on the side of the support member 4 close to the grouting pipe 2, wherein the radius of the curved surface can be the same as the outer diameter of the grouting pipe 2. After the support member 4 is installed, the side of the support member 4 close to the grouting pipe 2 will collide with the grouting pipe 2. Therefore, the contact surfaces are set as corresponding curved surfaces to reduce excessive extrusion force generated during the collision and provide a certain degree of protection for the grouting pipe 2.

[0014] As a preferred technical solution, a groove 5 is provided at the contact position between the support member 4 and the steel wire 1 to prevent the support member 4 from falling off.

[0015] A groove 5 is provided on the side of the support member 4 close to the steel wire 1. The groove 5 can be an arc-shaped concave surface. The inner side surface of the groove 5 can be the same as the outer side surface of the steel wire 1. After the support member 4 stretches the steel wire 1, the steel wire 1 is stuck in the groove of the support member 4. The two adjacent steel wires 1 generate an extrusion force on the support member 4, clamping the support member 4, effectively preventing the support member 4 from sliding along the steel wire and preventing the support member 4 from detaching from between the two adjacent steel wires 1, effectively ensuring that the slurry outlet 3 is unobstructed during grouting.

[0016] As a further preferred technical solution, the support member 4 is provided with a rounded corner or chamfered corner at one end close to the grouting pipe 2 .

[0017] A rounded corner or chamfer is provided at one end of the support member 4 to facilitate installation of the support member 4 and insertion of the support member 4 between two adjacent steel wires 1, thereby saving effort and reducing damage to the steel wires 1 when the support member 4 is installed.

[0018] As a preferred technical solution, a locking mechanism 6 is provided at the end of the steel wire 1 .

[0019] The locking mechanism 6 can prevent the steel wire 1 from breaking, fix the exposed end of the steel wire through the locking mechanism 6, and avoid injuries to construction workers during construction or transportation.

[0020] As a preferred technical solution, the locking mechanism 6 is a triangular locking structure.

[0021] The locking mechanism 6 is a triangular structure, which is stable and has a good locking effect on the steel wire.

[0022] A novel full-length adhesive anchor cable comprises a steel wire 1 and a grouting pipe 2. The steel wire 1 is arranged around the outer layer of the grouting pipe 2. The grouting pipe 2 is provided with a grouting outlet 3. The steel wire 1 is provided with a support member 4 at the position of the grouting outlet 3 for holding the steel wire 1 open. The support member 4 is provided with a through hole 7 connected to the grouting outlet 3. The adjacent steel wires 1 are held open by the support member 4. The support member 4 has a central through hole. The grouting outlet 3 is provided at a position in the grouting pipe 2 corresponding to the through hole 7. During grouting, the slurry flows through the grouting outlet 3 of the grouting pipe 2 into the through hole 7 of the support member 4 and then flows out from the through hole 7 to achieve grouting. The support member 7 holds the steel wire 1 open to fully open the grouting outlet 2, effectively preventing the steel wire 1 from clogging the grouting outlet 3 during grouting. At the same time, the through hole 7 corresponding to the grouting outlet 3 is provided in the support member 4 to divert the grouting, thereby achieving fast and accurate grouting.

[0023] The present invention provides a new type of full-length bonded anchor cable with good slurry discharge effect, low production cost, easy processing, easy installation and maintenance, and long service life. The metal bellows used in this anchor cable is a spiral bellows, which is convenient for later connection with grouting equipment. The installation and use procedures of this anchor cable are basically the same as those of ordinary anchor cables, and it has the beneficial effects of simple installation and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is the AA cross-sectional view of the present invention;

[0026] Figure 3 It is the BB cross-sectional view of the present invention;

[0027] Figure 4 This is a left side view of the locking mechanism of the present invention;

[0028] Figure 5 is a cross-sectional view of the support member of the present invention;

[0029] Figure 6 This is a structural diagram of another embodiment of the present invention;

[0030] Figure 7 It is a CC cross-sectional view of the present invention;

[0031] Figure 8 For the present invention Figure 6 Enlarged view of the middle support member;

[0032] Among them, 1 is a steel wire, 2 is a grouting pipe, 3 is a slurry outlet, 4 is a support member, 5 is a groove, 6 is a locking mechanism, 7 is a through hole, and 8 is a curved surface. DETAILED DESCRIPTION

[0033] In order to make the technical means, technical features, invention objectives and technical effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0034] Example 1

[0035] like Figure 1 As shown, a new full-length adhesive anchor cable comprises a steel wire 1 and a grouting pipe 2. The steel wire 1 is arranged around the outer layer of the grouting pipe 2. The grouting pipe 2 is provided with a grouting outlet 3. A support member 4 is provided near the grouting outlet 3 to prop the steel wire 1 open and allow it to escape the grouting outlet 3. The support member 4 is provided between two adjacent steel wires 1. A locking mechanism 6 is provided at the end of each steel wire 1. The locking mechanism 6 is a triangular locking structure.

[0036] The grouting pipe 2 can be a corrugated pipe, or a steel pipe, a seamless steel pipe or a welded pipe.

[0037] The support member 4 stretches the two adjacent steel wires 1 to a certain distance, exposing a portion of the middle grouting pipe 2, and opening a slurry outlet 3 on the grouting pipe 2. The slurry outlet 3 can be positioned appropriately based on actual conditions. The slurry outlet 3 needs to be fully exposed, and the diameter of the slurry outlet 3 is smaller than the distance between the two steel wires stretched by the support member 4. The slurry outlet 3 can be located on one side of the support member 4, or on both sides of the support member 4, and can be arranged based on the actual requirements of grouting.

[0038] like Figure 2 As shown, after the support member 4 is inserted between two adjacent steel wires 1, the steel wires 1 set on the outer layer of the grouting pipe 2 are stretched, and the grouting pipe 2 is drilled between the two adjacent stretched steel wires 1 to make a slurry outlet 3. At this time, the slurry outlet 3 is completely leaking, and the steel wires 1 will not cause blockage of the slurry outlet 3 during grouting. In addition, the slurry outlet 3 can be set at different positions in the grouting pipe 2 according to actual needs to improve the grouting effect. As for the installation position of the support member 4, one or two can be set on a cross section, and they can be evenly distributed over a certain length as needed to ensure grouting uniformity and improve grouting efficiency.

[0039] like Figure 5 As shown, the support member 4 is provided with a curved surface on the side close to the grouting pipe 2. After the support member 4 is installed, it is clamped by two adjacent steel wires 1. The support member 4 is provided with a curved surface on the side close to the grouting pipe 2, wherein the radius of the curved surface can be the same as the outer diameter of the grouting pipe 2. After the support member 4 is installed, the side of the support member 4 close to the grouting pipe 2 will collide with the grouting pipe 2. Therefore, the contact surfaces are set as corresponding curved surfaces to reduce the excessive extrusion force generated during the collision and provide a certain degree of protection for the grouting pipe 2.

[0040] like Figure 5 As shown, the contact position between the support member 4 and the steel wire 1 is provided with a groove 5 to prevent the support member 4 from falling off. A groove 5 is provided on the side of the support member 4 close to the steel wire 1. The groove 5 can be an arc-shaped concave surface. The inner side of the groove 5 can be the same as the outer side of the steel wire 1. After the support member 4 stretches the steel wire 1, the steel wire 1 is stuck in the groove of the support member 4. Two adjacent steel wires 1 generate an extrusion force on the support member 4, clamping the support member 4, effectively preventing the support member 4 from sliding along the steel wire and preventing the support member 4 from detaching from between the two adjacent steel wires 1, effectively ensuring that the slurry outlet 3 is unobstructed during grouting.

[0041] like Figure 5 As shown, the support member 4 is provided with a rounded corner or chamfer at one end close to the grouting pipe 2. Providing a rounded corner or chamfer at one end of the support member 4 facilitates the installation of the support member 4 and facilitates the insertion of the support member 4 between two adjacent steel wires 1, thus saving effort and reducing damage to the steel wires 1 during the installation of the support member 4.

[0042] In this embodiment, the full-length bonded anchor cable has good slurry discharge effect, low production cost, easy processing, easy installation and maintenance, and long service life. The metal bellows used in this anchor cable is a spiral bellows, which is convenient for later connection with grouting equipment. The installation and use procedures of this anchor cable are basically the same as those of ordinary anchor cables, and it has the beneficial effects of simple installation and easy use.

[0043] Example 2

[0044] like Figure 6 and Figure 7 As shown, a new type of full-length adhesive anchor cable includes a steel wire 1 and a grouting pipe 2. The steel wire 1 is arranged around the outer layer of the grouting pipe 2. The grouting pipe 2 is provided with a grouting outlet 3. The steel wire 1 is provided with a support member 4 for supporting the steel wire 1 at the grouting outlet 3. The support member 4 has a through hole 7 connected to the grouting outlet 3. The support member 4 has a curved surface 8 on the side close to the grouting pipe 2. The support member 4 has a groove 5 at the contact position with the steel wire 1 to prevent the support member 4 from falling off.

[0045] like Figure 7 As shown, two support members 4 are provided, distributed on the left and right sides and symmetrically distributed along the grouting pipe 2. The support members 4 are used to support the adjacent steel wires 1. The support member 4 has a central through hole 7, and a slurry outlet 3 is provided at a position corresponding to the through hole 7 in the grouting pipe 2. During grouting, the slurry flows into the through hole 7 of the support member 4 through the slurry outlet 3 of the grouting pipe 2, and then flows out from the through hole 7 to achieve grouting. The support member 7 props the steel wire 1 open to achieve the effect of fully opening the slurry outlet 2, effectively preventing the steel wire 1 from causing clogging of the slurry outlet 3 during grouting. At the same time, the through hole 7 corresponding to the slurry outlet 3 is provided in the support member 4, which plays the role of grouting diversion and achieves the effect of fast and accurate grouting.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A method for using a novel full-length adhesive anchor cable, the anchor cable comprising a steel wire (1) and a grouting pipe (2), characterized in that: The steel wire (1) is arranged around the outer layer of the grouting pipe (2), and the grouting pipe (2) is provided with a grouting outlet (3). The position of the steel wire (1) near the grouting outlet (3) is provided with a support member (4) for supporting the steel wire (1) to leak out of the grouting outlet (3); the support member (4) is arranged between two adjacent steel wires (1); the position where the support member (4) contacts the steel wire (1) is provided with a groove (5) for preventing the support member (4) from falling off, and the support member (4) is close to the grouting outlet (3). One side of the grouting pipe (2) is provided with an arc surface (8), and the end of the steel wire (1) is provided with a locking mechanism (6); when in use, after the support member (4) is inserted between two adjacent steel wires (1), the steel wire (1) arranged on the outer layer of the grouting pipe (2) is stretched, and the grouting pipe (2) is drilled between the two adjacent stretched steel wires (1) to produce a slurry outlet (3). At this time, the slurry outlet (3) is completely leaked, and the steel wire (1) will not cause blockage to the slurry outlet (3) during grouting.

2. The method for using the novel full-length adhesive anchor cable according to claim 1 is characterized in that: The support member (4) is provided with a rounded corner or a chamfered corner at one end close to the grouting pipe (2).

3. The method for using the novel full-length adhesive anchor cable according to claim 1 is characterized in that: The locking mechanism (6) is a triangular locking structure.

4. A method for using a novel full-length adhesive anchor cable, the anchor cable comprising a steel wire (1) and a grouting pipe (2), characterized in that: The steel wire (1) is arranged around the outer layer of the grouting pipe (2), and the grouting pipe (2) is provided with a slurry outlet (3). The steel wire (1) is provided with a support member (4) for holding the steel wire (1) open at the position of the slurry outlet (3), and the support member (4) is provided with a through hole (7) communicating with the slurry outlet (3); the support member (4) is arranged between two adjacent steel wires (1); a locking mechanism (6) is provided at the end of the steel wire (1); a curved surface (8) is provided on the side of the support member (4) close to the grouting pipe (2); and an anti-locking mechanism is provided at the contact position between the support member (4) and the steel wire (1). The groove (5) prevents the support member (4) from falling off; when in use, the adjacent steel wires (1) are stretched open by the support member (4), the support member (4) is provided with a central through hole (7), and a slurry outlet (3) is provided at a position of the grouting pipe (2) corresponding to the through hole (7); during grouting, the slurry flows into the through hole (7) of the support member (4) through the slurry outlet (3) of the grouting pipe (2), and then flows out from the through hole (7), thereby achieving grouting; the support member (4) stretches the steel wire (1) to achieve the effect of fully opening the slurry outlet (3), thereby effectively preventing the steel wire (1) from causing clogging of the slurry outlet (3) during grouting.

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