Pumping anchoring hollow grouting anchor cable and construction method

Abstract

The pump grouting anchoring hollow grouting anchor cable comprises an anchor cable body, a grout stopping plug, a grout outlet birdcage, a grouting pipe, an anchoring pipe and a blocking pipe, the anchor cable body is of a hollow structure with the two ends open, the grout stopping plug and the grout outlet birdcage are arranged on the peripheral face of the anchor cable body in a spaced mode, the grouting pipe is communicated with the grout outlet birdcage, and the blocking pipe is communicated with the grouting pipe. The top end of the anchoring pipe extends into the grouting pipe and is located between the top end of the grouting pipe and the grout outlet birdcage, the tail end of the anchoring pipe is located outside the grouting pipe, the anchoring pipe can move in the axial direction of the grouting pipe, and the blocking pipe is fixedly arranged in the grouting pipe. According to the pump grouting anchoring hollow grouting anchor cable, the grouting pipe and the anchoring pipe are responsible for grouting and anchoring respectively, grouting and anchoring are independently carried out, blocking of solid particles in grout to a channel is effectively reduced, the grouting effect is improved, the anchor cable is easier and more convenient to install and operate, the construction difficulty is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grouting anchor cables, and in particular to a pump-anchored hollow grouting anchor cable and a construction method. Background Art

[0002] In coal tunnel support, grouting anchor is a commonly used support method, which fixes the rock mass around the tunnel through anchors to enhance its stability. The traditional anchor cable anchoring process mainly relies on the friction between the anchor cable and the rock mass for anchoring, but this method has certain limitations, such as limited anchoring length and small initial anchoring force. In order to solve the shortcomings of traditional anchor cables, CN202311801590.3 announced a dual-channel hollow grouting anchor cable, which increases the anchoring length and the initial anchoring force of the anchor cable by pumping anchoring agent into the anchor pipe and grouting in the annular channel between the anchor pipe and the outer pipe. In addition, the introduction of high-pressure grouting enables the anchor cable to give full play to its active support effect.

[0003] However, in actual use, it was found that this double-channel hollow grouting anchor cable has certain defects. Due to the small gap in the annular channel, solid particles in the slurry can easily block the channel, affecting the grouting volume and grouting effect, and thus affecting the support performance of the anchor cable. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a pump-anchored hollow grouting anchor cable.

[0006] The pump-anchored hollow grouting anchor cable of the embodiment of the present invention comprises an anchor cable body, a grouting plug, a grouting birdcage, a grouting pipe, an anchoring pipe and a retaining pipe, wherein the anchor cable body is a hollow structure with openings at both ends; the grouting plug and the grouting birdcage are arranged on the outer peripheral surface of the anchor cable body at intervals, and the grouting plug is arranged adjacent to the top end of the anchor cable body; the grouting pipe is arranged in the anchor cable body and extends along the axial direction of the anchor cable body, and the grouting pipe is connected with the grouting birdcage to grout into the hole; the top end of the anchoring pipe extends into the grouting pipe and is located between the top end of the grouting pipe and the grouting birdcage, the tail end of the anchoring pipe is located outside the grouting pipe, the anchoring pipe is movable along the axial direction of the grouting pipe, and the anchoring pipe is used to inject anchoring agent into the hole; the retaining pipe is fixed in the grouting pipe, and is used to stop the anchoring pipe from moving toward the top end of the grouting pipe in the axial direction of the grouting pipe.

[0007] In some embodiments, the pump-anchored hollow grouting anchor cable of the embodiment of the present invention further includes a sealing ring, and the sealing ring is arranged between the retaining tube and the anchoring tube.

[0008] In some embodiments, the single-sided gap between the anchor pipe and the grouting pipe is greater than or equal to 0.5 mm.

[0009] In some embodiments, the pump-anchored hollow grouting anchor cable of the embodiment of the present invention further includes a connector and an anchor injection assembly, the anchor pipe is connected to the anchor injection assembly via the connector, and the anchor injection assembly is used to inject anchor into the anchor pipe.

[0010] In some embodiments, the connector has a first hole and a second hole coaxially arranged, the inner diameter of the first hole is larger than the outer diameter of the anchor body, the inner diameter of the second hole is larger than the outer diameter of the anchor pipe and smaller than the outer diameter of the grouting pipe, at least a portion of the anchor body is placed in the first hole, the anchor pipe passes through the first hole and the second hole in sequence and is connected to the anchor injection assembly, a threaded through hole is opened on the side wall of the first hole, a fixing screw is provided on the threaded through hole, and the fixing screw is used to fix the anchor body.

[0011] In some embodiments, the connector also has a third hole, which is connected to the second hole and coaxially arranged, wherein the inner diameter of the third hole is larger than the outer diameter of the anchor tube, and the anchor injection assembly includes an anchor mixing sleeve, which is threadedly connected to the third hole and connected to the anchor tube for injecting anchor into the anchor tube.

[0012] In some embodiments, the anchor injection assembly also includes a transition sleeve, which is disposed in the third hole and has one end threadedly connected to the anchor pipe, and the anchor mixing sleeve is stopped on the end surface of the other end of the transition sleeve, and the anchor mixing sleeve is connected to the transition sleeve.

[0013] In some embodiments, a flow mixer is detachably provided in the anchor mixing sleeve.

[0014] In some embodiments, the pump-anchored hollow grouting anchor cable of the embodiment of the present invention also includes a main material pipe, a first material delivery branch pipe and a second material delivery branch pipe. The main material pipe is threadedly connected to the anchor mixing sleeve, and the first material delivery branch pipe and the second material delivery branch pipe are respectively connected to the main material pipe for conveying different anchors into the main material pipe.

[0015] The construction method of the pump-injection anchoring hollow grouting anchor cable of the embodiment of the present invention comprises:

[0016] S1: First, inject anchoring agent into the hole through the anchoring tube;

[0017] S2: After the anchoring agent solidifies, the anchoring pipe is pulled out from the grouting pipe;

[0018] S3: Inject grout into the cavity through the grouting pipe.

[0019] The pump-anchored hollow grouting anchor cable of the embodiment of the present invention has a grouting pipe and an anchoring pipe respectively responsible for grouting and anchoring, and grouting and anchoring are carried out independently. Compared with the related art, it effectively reduces the blockage of the channel by solid particles in the slurry, improves the grouting effect, makes the installation and operation of the anchor cable easier, reduces the construction difficulty, and improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the use of the pump-anchored hollow grouting anchor cable according to an embodiment of the present invention.

[0021] Figure 2 It is a partial enlarged view of the pump-anchored hollow grouting anchor cable according to an embodiment of the present invention.

[0022] Figure 3 It is a partial enlarged view of the pump-anchored hollow grouting anchor cable according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100. Pump-anchored hollow grouting anchor cable; 1. Anchor cable body; 2. Grout stop plug; 3. Grout bird cage; 4. Grouting pipe; 5. Anchor pipe; 7. Stop pipe; 8. Connector; 801. First hole; 802. Second hole; 803. Third hole; 9. Fixing screw; 10. Anchor mixing sleeve; 11. Adapter sleeve; 12. Mixer; 13. Main material pipe; 14. First material delivery branch pipe; 15. Second material delivery branch pipe. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] The pump-injected hollow grouting anchor cable 100 of the embodiment of the present invention comprises an anchor cable body 1, a grouting plug 2, a grouting bird cage 3, a grouting pipe 4, an anchoring pipe 5 and a retaining pipe 7. The anchor cable body 1 is a hollow structure with openings at both ends. The grouting plug 2 and the grouting bird cage 3 are arranged on the outer peripheral surface of the anchor cable body 1 at intervals, and the grouting plug 2 is arranged adjacent to the top of the anchor cable body 1. The grouting pipe 4 is arranged in the anchor cable body 1 and extends along the axial direction of the anchor cable body 1. The grouting pipe 4 is connected with the grouting bird cage 3 to grout into the hole. The top end of the anchoring pipe 5 extends into the grouting pipe 4 and is located between the top end of the grouting pipe 4 and the grouting bird cage 3. The tail end of the anchoring pipe 5 is located outside the grouting pipe 4. The anchoring pipe 5 is movable along the axial direction of the grouting pipe 4. The anchoring pipe 5 is used to inject anchoring agent into the hole. The retaining pipe 7 is fixed in the grouting pipe 4 and is used to stop the anchoring pipe 5 from moving toward the top end of the grouting pipe 4 in the axial direction of the grouting pipe 4.

[0027] The pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention is placed in a pre-drilled hole when in use. First, the anchoring agent is injected into the anchoring tube 5. The anchoring agent in the anchoring tube 5 passes through the retaining tube 7 and enters the hole from the top of the grouting tube 4. The setting of the retaining tube 7 prevents the anchoring tube 5 from moving toward the top of the grouting tube 4 during the grouting process, thereby ensuring the accurate injection of the anchoring agent. The grouting stopper 2 can prevent the anchoring agent from flowing back in the hole, so that the anchoring agent forms a whole with the rock mass after solidification, thereby enhancing the stability and bearing capacity of the rock mass. After the anchoring agent solidifies, the anchoring tube 5 is pulled out of the grouting tube 4. After the anchoring tube 5 is pulled out, grouting is injected into the grouting tube 4. The slurry in the grouting tube 4 enters the hole through the slurry outlet bird cage 3 to fill it, further reinforcing the rock mass, forming a continuous reinforcement layer, and improving the stability and safety of the tunnel.

[0028] Therefore, the pump-anchored hollow grouting anchor 100 of the embodiment of the present invention has the grouting pipe 4 and the anchoring pipe 5 respectively responsible for grouting and anchoring, and the grouting and anchoring are carried out independently. Compared with the related art, it effectively reduces the blockage of the channel by solid particles in the slurry, improves the grouting effect, makes the installation and operation of the anchor cable easier, reduces the construction difficulty, and improves the construction efficiency.

[0029] In some embodiments, the pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention further includes a sealing ring, which is arranged between the retaining tube 7 and the anchoring tube 5 .

[0030] The function of the sealing ring is to ensure that no leakage of the anchoring agent occurs at the connection between the anchoring pipe 5 and the retaining pipe 7, thereby preventing the anchoring agent from clogging the gap between the grouting pipe 4 and the anchoring pipe 5, which would cause the anchoring pipe 5 to be unable to be pulled out of the grouting pipe 4, thereby improving the working reliability of the pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention.

[0031] In some embodiments, the single-side gap between the anchor pipe 5 and the grouting pipe 4 is greater than or equal to 0.5 mm.

[0032] The single-side gap between the anchor pipe 5 and the grouting pipe 4 is greater than or equal to 0.5 mm, so that the anchor pipe 5 can be quickly taken out of the grouting pipe 4, which is conducive to improving work efficiency.

[0033] In some embodiments, the pump-anchored hollow grouting anchor 100 of the embodiment of the present invention further includes a connector 8 and an anchor injection assembly. The anchor pipe 5 is connected to the anchor injection assembly via the connector 8 , and the anchor injection assembly is used to inject the anchor into the anchor pipe 5 .

[0034] like Figure 3As shown, the anchor injection assembly is used to inject the anchor into the anchor pipe 5. After the anchor is solidified in the hole, it forms a whole with the rock mass to enhance the anchoring effect. The injection assembly can control the injection speed and pressure of the anchor to adapt to different geological conditions and anchoring requirements. The connector 8 provides a mechanical connection between the anchor pipe 5 and the anchor injection assembly to ensure that the anchor can be smoothly transferred into the anchor pipe 5.

[0035] The pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention can more effectively fill rock cracks and improve anchoring performance by precisely controlling the injection of the anchoring agent. The modular design makes the construction more flexible, and the components can be quickly adjusted and replaced according to different construction requirements. The reliable connector 8 and injection component design reduce the safety risks during the construction process. Since the components are easy to replace and maintain, the maintenance cost of the entire system is reduced.

[0036] In some embodiments, the connector 8 has a first hole 801 and a second hole 802 coaxially arranged, the inner diameter of the first hole 801 is larger than the outer diameter of the anchor body 1, and the inner diameter of the second hole 802 is larger than the outer diameter of the anchor pipe 5 and smaller than the outer diameter of the grouting pipe 4. At least a portion of the anchor body 1 is placed in the first hole 801, the anchor pipe 5 passes through the first hole 801 and the second hole 802 in sequence and is connected to the anchor injection assembly, a threaded through hole is opened on the side wall of the first hole 801, and a fixing screw 9 is provided on the threaded through hole, and the fixing screw 9 is used to fix the anchor body 1.

[0037] The inner diameter of the first hole 801 is larger than the outer diameter of the anchor body 1, so that at least a portion of the anchor body 1 can be placed in the first hole 801, providing space for fixing the anchor body 1. When a portion of the anchor body 1 is placed in the first hole 801, the anchor body 1 is fixed in the first hole 801 by screwing the fixing screw 9.

[0038] The pump-anchored hollow grouting anchor 100 of the embodiment of the present invention fixes the anchor body 1 by fixing the screw 9, which can ensure that the connection between the anchor body 1 and the connector 8 is more stable and prevent relative movement during the anchor injection or grouting process. The connectivity between the anchor pipe 5 and the anchor injection assembly is guaranteed, which helps to improve the efficiency of the anchor injection and the anchoring effect. The coaxial design of the connector 8 makes the construction process simpler and the installation of the anchor body 1 and the anchor pipe 5 is faster. This design allows the connector 8 to adapt to anchor bodies 1 and anchor pipes 5 of different diameters, increasing the versatility and adaptability of the system. The provision of the fixing screw 9 increases the safety of the system and prevents loosening of components due to vibration or other reasons during construction.

[0039] In some embodiments, the connector 8 further has a third hole 803, which is connected to the second hole 802 and is coaxially arranged, wherein the inner diameter of the third hole 803 is larger than the outer diameter of the anchor tube 5. The anchor injection assembly includes an anchor mixing sleeve 10, which is threadedly connected to the third hole 803 and connected to the anchor tube 5, and is used to inject the anchor into the anchor tube 5.

[0040] The third hole 803 is connected to the second hole 802, ensuring that the anchor can be smoothly transferred from the anchor injection assembly to the anchor pipe 5. The third hole 803 is coaxially arranged with the second hole 802, maintaining the neatness of the design and the stability of the structure of the connector 8. The inner diameter of the third hole 803 is larger than the outer diameter of the anchor pipe 5, ensuring that the anchor pipe 5 can pass through the third hole 803 smoothly, while providing installation space for the anchor mixing sleeve 10.

[0041] The design of the third hole 803 and the anchor mixing sleeve 10 of the pump-anchored hollow grouting anchor cable 10 of the embodiment of the present invention enables the anchor to be efficiently injected into the anchor pipe 5, reducing the injection time and labor intensity. The setting of the third hole 803 makes the connector 8 structure more compact and reasonable, which contributes to the stability and durability of the overall system. The integrated design of the anchor injection assembly simplifies the construction operation and improves the construction efficiency. The threaded connection and coaxial setting ensure the reliability of the connector 8 and reduce the problems that may occur during the high-pressure grouting process.

[0042] In some embodiments, the anchor injection assembly also includes a transition sleeve 11, which is disposed in the third hole 803 and has one end threadedly connected to the anchor pipe 5, and the anchor mixing sleeve 10 is stopped on the end surface of the other end of the transition sleeve 11, and the anchor mixing sleeve 10 is connected to the transition sleeve 11.

[0043] It should be noted that, since the wall thickness of the anchor pipe 5 is relatively thin, the adapter sleeve 11 is connected to the anchor mixing sleeve 10, which can avoid damage to the structure of the anchor pipe 5 during the communication with the anchor pipe 5, which is beneficial to improving the service life of the anchor pipe 5. In addition, the design of the adapter sleeve 11 and the anchor mixing sleeve 10 makes the installation process simpler, and the construction personnel can quickly complete the installation of the components.

[0044] In some embodiments, a flow mixer 12 is detachably provided in the anchor mixing sleeve 10 .

[0045] The mixer 12 can ensure uniform mixing of the anchoring agent, thereby improving the quality of the anchoring agent and the anchoring effect. The detachable mixer 12 allows construction personnel to quickly adjust the mixer 12 according to different construction requirements, thereby enhancing the flexibility of construction. The use of the mixer 12 helps to optimize the grouting process and ensure that the anchoring agent can reach the best state when injected into the rock fissures. Through the uniform mixing effect of the mixer 12, the material waste caused by uneven mixing of the anchoring agent can be reduced. The presence of the mixer 12 helps to improve the reliability of the entire anchoring system because it ensures the uniformity and stability of the anchoring agent. The detachable design of the mixer 12 also makes it easier to clean the anchor sleeve after the construction is completed, reducing the difficulty and time of cleaning.

[0046] In some embodiments, the pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention further includes a main material pipe 13, a first material delivery branch pipe 14 and a second material delivery branch pipe 15. The main material pipe 13 is threadedly connected to the anchor mixing sleeve 10, and the first material delivery branch pipe 14 and the second material delivery branch pipe 15 are respectively connected to the main material pipe 13 for delivering different anchors into the main material pipe 13.

[0047] The first feed branch pipe 14 and the second feed branch pipe 15 are respectively used to transport anchors of different components, which can be anchors of different chemical compositions or different physical states (such as liquid and powder). By controlling the delivery flow of the first feed branch pipe 14 and the second feed branch pipe 15, the mixing ratio of anchors of different components can be accurately controlled to achieve the best anchoring effect. The design of the main feed pipe 13 and the feed branch pipes ensures that the anchors can be evenly mixed in the mixing sleeve, thereby improving the quality and anchoring effect of the anchors. By using different anchor components, the performance of the anchor can be adjusted according to different geological conditions and engineering requirements, thereby enhancing the flexibility of construction.

[0048] The construction method of the pump-anchored hollow grouting anchor cable 100 according to the embodiment of the present invention comprises:

[0049] S1: First, an anchoring agent is injected into the hole through the anchoring pipe 5. The solidification process of the anchoring agent forms the anchoring agent and the rock mass into a whole, thereby enhancing the stability and bearing capacity of the rock mass.

[0050] S2: After the anchoring agent solidifies, the anchoring pipe 5 is pulled out from the grouting pipe 4;

[0051] S3: Grouting is injected into the cavity through the grouting pipe 4. The grout fills the hole, further reinforces the rock mass, forms a continuous reinforcement layer, and improves the stability and safety of the tunnel.

[0052] Therefore, the construction method of the pump-anchored hollow grouting anchor cable 100 of the embodiment of the present invention uses the grouting pipe 4 and the anchoring pipe 5 to be responsible for grouting and anchoring respectively, and the grouting and anchoring are carried out independently. Compared with the related art, it effectively reduces the blockage of the channel by solid particles in the slurry, improves the grouting effect, makes the installation and operation of the anchor cable easier, reduces the construction difficulty, and improves the construction efficiency.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pump-anchored hollow grouting anchor cable, characterized in that: include: An anchor cable body (1), the anchor cable body (1) being a hollow structure with openings at both ends; A slurry stopper (2) and a slurry outlet bird cage (3), wherein the slurry stopper (2) and the slurry outlet bird cage (3) are arranged at intervals on the outer peripheral surface of the anchor cable body (1), and the slurry stopper (2) is arranged adjacent to the top end of the anchor cable body (1); A grouting pipe (4), the grouting pipe (4) being arranged in the anchor cable body (1) and extending along the axial direction of the anchor cable body (1), the grouting pipe (4) being connected to the grouting bird cage (3) so as to inject grout into the hole; An anchor pipe (5), the top end of the anchor pipe (5) extends into the grouting pipe (4) and is located between the top end of the grouting pipe (4) and the grouting bird cage (3), the tail end of the anchor pipe (5) is located outside the grouting pipe (4), the anchor pipe (5) is movable along the axial direction of the grouting pipe (4), and the anchor pipe (5) is used to inject an anchoring agent into the hole; A stopper tube (7), the stopper tube (7) being fixedly arranged in the grouting tube (4) and being used to stop the anchoring tube (5) from moving toward the top end of the grouting tube (4) in the axial direction of the grouting tube (4).

2. The pump-anchored hollow grouting anchor cable according to claim 1, characterized in that: It also comprises a sealing ring, which is arranged between the retaining tube (7) and the anchoring tube (5).

3. The pump-anchored hollow grouting anchor cable according to claim 1, characterized in that: The single-side gap between the anchor pipe (5) and the grouting pipe (4) is greater than or equal to 0.5 mm.

4. The pump-anchored hollow grouting anchor cable according to claim 1, characterized in that: It also comprises a connector (8) and an anchoring agent injection assembly, wherein the anchoring tube (5) is connected to the anchoring agent injection assembly via the connector (8), and the anchoring agent injection assembly is used for injecting the anchoring agent into the anchoring tube (5).

5. The pump-anchored hollow grouting anchor cable according to claim 4, characterized in that: The connector (8) comprises a first hole (801) and a second hole (802) which are coaxially arranged, wherein the inner diameter of the first hole (801) is larger than the outer diameter of the anchor body (1), and the inner diameter of the second hole (802) is larger than the outer diameter of the anchor pipe (5) and smaller than the outer diameter of the grouting pipe (4). At least a portion of the anchor body (1) is placed in the first hole (801), and the anchor pipe (5) passes through the first hole (801) and the second hole (802) in sequence and is connected to the anchor injection assembly. A threaded through hole is provided on the side wall of the first hole (801), and a fixing screw (9) is provided on the threaded through hole. The fixing screw (9) is used to fix the anchor body (1).

6. The pump-anchored hollow grouting anchor cable according to claim 5, characterized in that: The connector (8) also has a third hole (803), which is connected to the second hole (802) and coaxially arranged, wherein the inner diameter of the third hole (803) is larger than the outer diameter of the anchor tube (5), and the anchor injection assembly includes an anchor mixing sleeve (10), which is threadedly connected to the third hole (803) and connected to the anchor tube (5) for injecting anchor into the anchor tube (5).

7. The pump-anchored hollow grouting anchor cable according to claim 6, characterized in that: The anchor injection assembly also includes a transition sleeve (11), which is disposed in the third hole (803) and one end of which is threadedly connected to the anchor pipe (5), and the anchor mixing sleeve (10) abuts against the end surface of the other end of the transition sleeve (11), and the anchor mixing sleeve (10) is connected to the transition sleeve (11).

8. The pump-anchored hollow grouting anchor cable according to claim 7, characterized in that: A flow mixer (12) is detachably provided in the anchoring agent mixing sleeve (10).

9. The pump-anchored hollow grouting anchor cable according to claim 8, characterized in that: It also includes a main material pipe (13), a first material delivery branch pipe (14) and a second material delivery branch pipe (15); the main material pipe (13) is threadedly connected to the anchor mixing sleeve (10); the first material delivery branch pipe (14) and the second material delivery branch pipe are respectively connected to the main material pipe (13) for delivering different anchors into the main material pipe (13).

10. A construction method for a pump-anchored hollow grouting anchor cable according to any one of claims 1 to 9, characterized in that: include: S1: firstly injecting an anchoring agent into the hole through the anchoring tube (5); S2: After the anchoring agent solidifies, the anchoring pipe (5) is pulled out from the grouting pipe (4); S3: Grouting is injected into the cavity through the grouting pipe (4).

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