Grouting auxiliary device, system and method

Abstract

The invention discloses a grouting auxiliary system, system and method, and belongs to the technical field of grouting, a grouting auxiliary device comprises a grout outlet shell, a containing cavity is formed in the grout outlet shell, a grout outlet communicated with the containing cavity is formed in the grout outlet shell, grout can penetrate through the containing cavity and is discharged through the grout outlet, and a hole to be grouted is filled with the grout; the peripheral surface of the slurry outlet shell is a pressed surface, and the static pressure of the slurry acts on the pressed surface; the grout can push the grout outlet shell to move in the direction close to the opening of the to-be-grouted hole. According to the grouting auxiliary device, the fullness of slurry distribution during grouting can be improved, the optimal pipe pulling force and moving speed of the grouting auxiliary device are adjusted according to the actual scene of the to-be-grouted hole, and therefore the risk that the slurry outlet pipe is wrapped is reduced, the grouting auxiliary device is more practical, and the construction quality of the anchor rod can be reflected conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting, and in particular to a grouting auxiliary system, system and method. Background Art

[0002] As a key construction project for tunnel excavation support, anchor rods can effectively improve the overall stability of the newly exposed surrounding rock. The construction process includes cement mortar grouting, anchor rod insertion, etc. Among them, cement mortar, as a bonding agent between the anchor rod and the surrounding rock, can effectively ensure that the anchor rod and the surrounding rock form a whole and improve the support effect.

[0003] According to the current "Non-destructive Testing Regulations for Anchors in Hydropower and Water Conservancy Projects" and other specifications, the fullness of cement mortar filling is the core indicator for anchor construction quality assessment, which affects the results of anchor construction quality rating. If it is judged as unqualified because the fullness does not meet the requirements, it needs to be re-filled, and the relevant costs are borne by the relevant units themselves, which not only causes repeated work and prolongs the operation time, but also leads to increased costs, resulting in an increase in the overall construction cost.

[0004] At present, the construction generally adopts a grouting and grouting machine to mix the cement mortar, and then directly inserts the hard plastic pipe as the grouting pipe into the bottom of the hole, and then pulls out 50mm~100mm to start grouting. The grouting pipe is slowly and evenly pulled out with the injection of slurry, so that the hole is filled with slurry. However, in actual operation, due to the factors such as the pulling speed, slurry collapse, and the diameter of the grouting pipe during the grouting process of the horizontal anchor hole, cavities will be generated during the grouting process, resulting in the grouting fullness not meeting the specification requirements; the anchor construction process of the inclined hole can be divided into two methods: "grouting first and then inserting the rod" and "inserting the rod first and then grouting". In actual operation, the "grouting first and then inserting the rod" process is more practical and can better reflect the quality of the anchor construction. When the "grouting first and then inserting the rod" process is adopted, the grouting process will cause the mortar to collapse downward due to the influence of gravity, which also causes the grouting fullness not to meet the specification requirements. There is also a phenomenon in the above construction process: if the pulling-out speed of the grouting pipe is slightly slower than the grouting speed, the slurry will wrap around the grouting pipe. Because the slurry is relatively viscous, the grouting pipe may not be pulled out. There may be abandoned holes or re-holes and cleaning, which increases the difficulty of construction operations, prolongs the operation time, and results in low quality and low efficiency. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the first object of the present invention is to provide a grouting auxiliary device, which can improve the fullness of slurry distribution during grouting.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a grouting auxiliary device, which includes a slurry discharge shell, a cavity is provided inside the slurry discharge shell, and a slurry discharge port connected to the cavity is provided on the slurry discharge shell, and the slurry can pass through the cavity and be discharged through the slurry discharge port and fill the hole to be grouted; the outer peripheral surface of the slurry discharge shell is a pressure surface, and the static pressure of the slurry acts on the pressure surface; the slurry can push the slurry discharge shell to move toward the hole opening close to the hole to be grouted.

[0009] As a preferred solution of the grouting auxiliary device described in the present invention, it further includes a slurry inlet shell, a transition chamber is provided inside the slurry inlet shell, and a slurry inlet port connected to the transition chamber is provided on the slurry inlet shell; the slurry inlet shell is connected to the slurry outlet shell, and the transition chamber is connected to the receiving chamber, so that the slurry can pass through the slurry inlet, the transition chamber and the receiving chamber in sequence and be discharged through the slurry outlet.

[0010] As a preferred embodiment of the grouting auxiliary device of the present invention, the slurry outlet shell and the slurry inlet shell are coaxially arranged, and the distance between the outer peripheral surface of the slurry outlet shell and its own central axis gradually increases from top to bottom, while the distance between the outer peripheral surface of the slurry inlet shell and its own central axis gradually decreases from top to bottom.

[0011] As a preferred solution of the grouting auxiliary device of the present invention, a plurality of hollow holes are opened on the surface of the slurry outlet shell, the hollow holes are connected to the cavity, and the plurality of hollow holes are evenly arranged in the circumferential direction around the slurry outlet shell.

[0012] As a preferred solution of the grouting auxiliary device described in the present invention, it further includes a slurry outlet pipe, which is connected to the slurry outlet port; the outer diameter of the maximum cross-section of the slurry outlet shell is defined as D1, the inner diameter of the slurry outlet pipe is D2, the length of the slurry outlet pipe is L, the inner diameter of the hole is D3, and D1≥D3; wherein 33mm<D1<38mm, 15mm<D2<17mm, and 85mm<L<95mm.

[0013] The second object of the present invention is to provide a grouting auxiliary system, which can adjust the optimal pipe pulling force and moving speed of the grouting auxiliary device according to the actual scene of the hole to be grouted, thereby reducing the risk of the grouting pipe being wrapped.

[0014] In order to solve the above technical problems, the present invention provides the following technical solutions: a grouting auxiliary system, comprising the above grouting auxiliary device, and further comprising a grouting module connected to the grout inlet pipe; a collection module for collecting the slurry static pressure P of the grouting auxiliary device; slurry and friction F friction The control module is electrically connected to the acquisition module and is used to analyze the stress state of the grouting auxiliary device when the hole to be grouted is in a horizontal state or an inclined state, and to adjust the pulling force and moving speed of the grouting auxiliary device.

[0015] As a preferred solution of the hydropower station dam elevator of the present invention, when the hole to be grouted is arranged horizontally, the stress state of the grouting auxiliary device is expressed as follows:

[0016] F pull -F friction +P slurry *A=m*a

[0017] When the speed is constant, a=0, the stress state of the grouting auxiliary device is expressed as:

[0018] F pull =F friction -P slurry *A

[0019] Among them, F pull is the extubation force, F friction is the friction force, P slurry is the static pressure of the slurry, A is the surface area of ​​the pressure surface, m is the mass of the grouting auxiliary device, and a is the acceleration.

[0020] As a preferred solution of the hydropower station dam elevator of the present invention, when the hole to be grouted is arranged obliquely, the stress state of the grouting auxiliary device is expressed as follows:

[0021] F pull -F friction +P slurry *A+mgsinθ=m*a

[0022] When the speed is constant, a=0, the stress state of the grouting auxiliary device is expressed as:

[0023] F pull =F friction -P slurry *A-mgsinθ

[0024] Where θ is the inclination angle of the hole to be grouting.

[0025] As a preferred solution of the hydropower station dam elevator of the present invention, the moving speed of the grouting auxiliary device is calculated; when the hole to be grouted is horizontally arranged, the moving speed of the grouting auxiliary device is expressed as:

[0026]

[0027] When the hole to be grouted is set horizontally, the moving speed of the grouting auxiliary device is expressed as:

[0028]

[0029] Here, μ is the coefficient of friction.

[0030] The third object of the present invention is to provide an anchor rod installation method, which adopts the process of grouting first and then inserting the rod, which is more practical and convenient for reflecting the construction quality of the anchor rod.

[0031] In order to solve the above technical problems, the present invention provides the following technical solutions: an anchor bolt installation method, comprising placing a grouting auxiliary device into a hole to be grouted; grouting the hole to be grouted; applying a pulling force F to the grouting auxiliary device pull , the thrust and pulling force F of the slurry pull Under the action of the force, the grouting auxiliary device moves toward the hole opening close to the hole to be grouted; the pipe pulling force and the moving speed of the grouting auxiliary device are adjusted according to the horizontal state or the inclined state; when the grouting of the hole to be grouted is completed, the anchor rod is inserted into the hole to be grouted.

[0032] The beneficial effects of the present invention are as follows: the present invention can improve the fullness of slurry distribution during grouting, and adjust the optimal pipe pulling force and moving speed of the grouting auxiliary device according to the actual scene of the hole to be grouted, thereby reducing the risk of the slurry outlet pipe being wrapped, being more in line with reality, and facilitating the reflection of the construction quality of the anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0034] Figure 1 It is a structural diagram of the grouting auxiliary device of the present invention.

[0035] Figure 2 It is a connection diagram of the grouting auxiliary system of the present invention.

[0036] Figure 3 It is a schematic diagram of the process of the anchor rod installation method of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figure 1 The present embodiment provides a grouting auxiliary device, including a slurry outlet shell 100 and a slurry inlet shell 200. The slurry outlet shell 100 and the slurry inlet shell 200 of the present embodiment are integrally formed, and the integrally formed slurry outlet shell 100 and the slurry inlet shell 200 are spindle-shaped.

[0042] Specifically, a cavity 101 is provided inside the slurry discharge shell 100, and a slurry outlet 102 connected to the cavity 101 is provided on the slurry discharge shell 100, and the slurry outlet 102 is located at the top of the slurry discharge shell 100. The cavity 101 is used to contain slurry, and the slurry can pass through the cavity 101 and be discharged through the slurry outlet 102 to fill the holes to be grouted; the outer peripheral surface of the slurry discharge shell 100 is a pressure surface 103, and the static pressure of the slurry acts on the pressure surface 103; the slurry can push the slurry discharge shell 100 to gradually move toward the hole opening close to the hole to be grouted, and in the process of pulling out the pipe to the outside, the grouting auxiliary device automatically retreats to achieve the pulling out effect, and the operator can control the pulling out speed of the grouting pipe with a little force, which saves effort and reduces the difficulty of operation.

[0043] Preferably, a transition chamber 201 is provided inside the slurry inlet shell 200, and a slurry inlet port 202 connected to the transition chamber 201 is provided on the slurry inlet shell 200, and the slurry inlet port 202 is located at the bottom of the slurry inlet shell 200, and the transition chamber 201 is also used to contain slurry; the slurry inlet shell 200 is connected to the slurry outlet shell 100, and the transition chamber 201 is connected to the receiving chamber 101, and the slurry can pass through the slurry inlet port 202, the transition chamber 201 and the receiving chamber 101 in sequence and be discharged through the slurry outlet port 102.

[0044] Preferably, the slurry outlet shell 100 and the slurry inlet shell 200 are coaxially arranged, and the distance between the outer peripheral surface of the slurry outlet shell 100 and its own central axis gradually increases from top to bottom, while the distance between the outer peripheral surface of the slurry inlet shell 200 and its own central axis gradually decreases from top to bottom, that is, the combined slurry outlet shell 100 and slurry inlet shell 200 are spindle-shaped, which is convenient for moving in the hole to be grouted.

[0045] Preferably, a plurality of hollow holes 104 are provided on the surface of the pulp outlet shell 100, the hollow holes 104 are connected to the cavity 101, and the plurality of hollow holes 104 are evenly arranged around the circumference of the pulp outlet shell 100. By providing a plurality of hollow holes 104, the slurry can flow out from the hollow holes 104 to supplement the slurry at the front pulp outlet 102, avoid the cavity caused by the collapse of the slurry, and improve the fullness of the slurry.

[0046] Preferably, it also includes a slurry discharge pipe 300, which is connected to the slurry discharge port 102; the outer diameter of the maximum cross section of the slurry discharge housing 100 is defined as D1, the inner diameter of the slurry discharge pipe 300 is D2, the length of the slurry discharge pipe 300 is L, and the inner diameter of the hole is D3, D1≥D3, that is, the slurry discharge housing 100 and the inner wall of the hole to be grouted are interference fit; wherein 33mm<D1<38mm, 15mm<D2<17mm, 85mm<L<95mm. The shape of the spindle can form a natural barrier. When the slurry enters the hole to be grouted, the cross section of the spindle will withstand the static pressure from the slurry.

[0047] It is worth noting that using an ultrasonic sensor to collect the intensity of a reflected signal to reflect the concentration of slurry in a container is a prior art and will not be described in detail here. In this embodiment, an ultrasonic sensor is used for non-contact monitoring of the distribution of slurry in a grouting hole. When there is more air in the slurry, the intensity of the reflected signal will decrease. The distribution of the slurry corresponds to the intensity of the reflected signal. When the reflected signal is higher, it means that there is less air in the slurry and the distribution of the slurry is better.

[0048] The ten sets of data collected are as follows:

[0049]

[0050] It can be seen from the table that the values ​​of D1, D2 and L of groups 1 to 10 gradually increase, but the reflection signal intensity shows a trend of first increasing and then decreasing, that is, a peak value appears. This peak value is the optimal value that can achieve the best uniform distribution of the slurry. In this embodiment, D1 is preferably 36 mm, D2 is preferably 16 mm, and D3 is preferably 90 mm.

[0051] The grouting auxiliary device of the present invention pushes the slurry outlet shell 100 to gradually move toward the hole opening to be grouted through the slurry. During the process of pulling out the pipe to the outside, the grouting auxiliary device retreats automatically to achieve the pipe pulling effect. The operator can control the pulling out speed of the grouting pipe with a little force, which saves effort and reduces the difficulty of operation. By setting a plurality of hollow holes 104, the slurry can flow out from the hollow holes 104 to supplement the slurry at the front end slurry outlet 102, avoid the formation of cavities due to slurry collapse, and improve the fullness of the slurry.

[0052] Comparative Example 1

[0053] The hollow holes of the grouting auxiliary device of this embodiment are arranged in a spiral arrangement, and the rest of the structure is the same.

[0054] The data collected for groups 4 to 7 in Example 1 are as follows:

[0055]

[0056] It can be seen from the above table that under the same structure, the spirally arranged hollow holes are not as good as the uniformly distributed hollow holes in terms of slurry uniform distribution effect.

[0057] Example 2

[0058] Reference Figure 2 This embodiment provides a grouting auxiliary system based on the grouting auxiliary device in Embodiment 1, which includes a grouting module 400, a collection module 500 and a control module 600. The grouting module 400 is used to inject slurry, the collection module 500 is used to collect data, and the control module 600 is used to control the pulling force and moving speed of the grouting auxiliary device.

[0059] Specifically, the grouting module 400 is connected to the grout inlet 202 through a pipeline, and the slurry enters the grouting auxiliary device through the grouting pipe; the collection module 500 is used to collect the slurry static pressure P of the grouting auxiliary device. slurry and friction F friction The control module 600 is electrically connected to the acquisition module 500. The control module 600 is used to analyze the stress state of the corresponding grouting auxiliary device when the hole to be grouted is in a horizontal state or an inclined state, and adaptively adjust the pulling force and moving speed of the grouting auxiliary device to reduce the risk of being wrapped at the grouting pipe due to the excessive moving speed of the grouting auxiliary device.

[0060] It is worth noting that the static pressure direction of the slurry in the hole to be grouted on the spindle is toward the spindle. Because static pressure refers to the force exerted by the slurry on the surface of the spindle due to its own gravity and external pressure. Therefore, the direction of this force is from the slurry to the spindle surface, that is, the static pressure direction is toward the spindle.

[0061] Preferably, when the hole to be grouted is arranged horizontally, the stress state of the grouting auxiliary device is expressed as:

[0062] F pull -F friction +P slurry *A=m*a

[0063] The grouting auxiliary device is moved at a constant speed, that is, when the speed is constant, a = 0, and the stress state of the grouting auxiliary device is expressed as:

[0064] F pull =F friction -P slurry *A

[0065] Among them, F pull is the extubation force, F friction is the friction force, P slurry is the static pressure of the slurry, A is the surface area of ​​the pressure surface 103, m is the mass of the grouting auxiliary device, and a is the acceleration.

[0066] Preferably, when the hole to be grouted is arranged obliquely, the stress state of the grouting auxiliary device is expressed as:

[0067] F pull -F friction +P slurry *A+mgsinθ=m*a

[0068] The grouting auxiliary device is moved at a constant speed, that is, when the speed is constant, a = 0, and the stress state of the grouting auxiliary device is expressed as:

[0069] F pull =F friction -P slurry *A-mgsinθ

[0070] Wherein, θ is the inclination angle of the hole to be grouting; the pipe pulling force is adaptively adjusted according to the actual inclination angle of the hole to be grouting, which is more practical.

[0071] Furthermore, the moving speed of the grouting auxiliary device is calculated;

[0072] When the hole to be grouted is set horizontally, the moving speed of the grouting auxiliary device is expressed as:

[0073]

[0074] When the hole to be grouted is set horizontally, the moving speed of the grouting auxiliary device is expressed as:

[0075]

[0076] Wherein, μ is the friction coefficient. The grouting auxiliary device is moved at this moving speed to reduce the risk of being wrapped at the slurry outlet pipe due to the excessive moving speed of the grouting auxiliary device.

[0077] Example 3

[0078] Reference Figure 3 This embodiment discloses an anchor rod installation method based on the grouting auxiliary system of Example 2.

[0079] Step 1: Place the grouting auxiliary device into the hole to be grouted;

[0080] Step 2: grouting into the hole to be grouted;

[0081] Step 3: Apply the pulling force F to the grouting auxiliary device pull , the thrust and pulling force F of the slurry pull Under the action of, the grouting auxiliary device moves toward the hole opening close to the hole to be grouting;

[0082] Step 4: Adjust the pulling force and the moving speed of the grouting auxiliary device according to the horizontal state or the tilted state;

[0083] Step 5: After grouting of the holes to be grouted is completed, insert anchor rods into the holes to be grouted.

[0084] Based on the above, the beneficial effects of the present invention are:

[0085] 1. The present invention uses slurry to push the slurry outlet shell 100 to gradually move toward the hole to be grouted. During the process of pulling out the pipe to the outside, the grouting auxiliary device automatically retreats to achieve the pulling out effect. The operator can control the pulling out speed of the grouting pipe with a little force, which saves effort and reduces the difficulty of operation. By setting a plurality of hollow holes 104, the slurry can flow out from the hollow holes 104 to supplement the slurry at the front end slurry outlet 102, avoid the formation of cavities due to the collapse of the slurry, and improve the fullness of the slurry.

[0086] 2. The present invention adaptively adjusts the pipe pulling force and moving speed of the grouting auxiliary device according to the actual inclination angle of the hole to be grouted, thereby reducing the risk of the grouting pipe being wrapped due to the excessive moving speed of the grouting auxiliary device.

[0087] 3. The present invention adopts the method of grouting first and then inserting the rod, which is more practical and convenient for reflecting the construction quality of the anchor rod.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A grouting auxiliary device, characterized in that: include: A slurry discharge shell (100) is provided with a cavity (101) inside, and the slurry discharge shell (100) is provided with a slurry discharge port (102) connected to the cavity (101), so that slurry can pass through the cavity (101) and be discharged through the slurry discharge port (102) to fill the hole to be grouted; The outer peripheral surface of the slurry outlet shell (100) is a pressure surface (103), and the static pressure of the slurry acts on the pressure surface (103); the slurry can push the slurry outlet shell (100) to move towards the hole opening close to the hole to be grouting.

2. The grouting auxiliary device according to claim 1, characterized in that: It also comprises a pulp inlet shell (200), a transition chamber (201) is provided inside the pulp inlet shell (200), and a pulp inlet port (202) connected to the transition chamber (201) is provided on the pulp inlet shell (200); the pulp inlet shell (200) is connected to the pulp outlet shell (100), and the transition chamber (201) is connected to the containing chamber (101), and the pulp can sequentially pass through the pulp inlet port (202), the transition chamber (201) and the containing chamber (101) and be discharged through the pulp outlet port (102).

3. The grouting auxiliary device according to claim 2, characterized in that: The pulp outlet shell (100) and the pulp inlet shell (200) are coaxially arranged, and the distance between the outer peripheral surface of the pulp outlet shell (100) and its own central axis gradually increases from top to bottom, while the distance between the outer peripheral surface of the pulp inlet shell (200) and its own central axis gradually decreases from top to bottom.

4. The grouting auxiliary device according to claim 2 or 3, characterized in that: A plurality of hollow holes (104) are provided on the surface of the pulp outlet shell (100), the hollow holes (104) are connected to the containing cavity (101), and the plurality of hollow holes (104) are evenly arranged in a circumferential direction around the pulp outlet shell (100).

5. The grouting auxiliary device according to claim 3, characterized in that: It also comprises a slurry discharge pipe (300), the slurry discharge pipe (300) being in communication with the slurry discharge port (102); the outer diameter of the maximum cross section of the slurry discharge shell (100) is defined as D1, the inner diameter of the slurry discharge pipe (300) is defined as D2, the length of the slurry discharge pipe (300) is defined as L, the inner diameter of the hole is defined as D3, and D1≥D3; wherein 33mm<D1<38mm, 15mm<D2<17mm, and 85mm<L<95mm.

6. A grouting auxiliary system, characterized in that: The grouting auxiliary device comprises the grouting auxiliary device according to any one of claims 2 to 5, and A grouting module (400) connected to the slurry inlet (202) through a pipeline; A collection module (500) is used to collect the static pressure P of the slurry to which the grouting auxiliary device is subjected. slurry and friction F friction ; The control module (600) is electrically connected to the acquisition module (500) and is used to analyze the stress state of the grouting auxiliary device when the hole to be grouted is in a horizontal state or an inclined state, and to adjust the pulling force and moving speed of the grouting auxiliary device.

7. The grouting auxiliary system according to claim 6, characterized in that: When the hole to be grouted is set horizontally, the stress state of the grouting auxiliary device is expressed as: F pull -F friction +P slurry *A=m*a When the speed is constant, a=0, the stress state of the grouting auxiliary device is expressed as: F pull =F friction -P slurry *A Among them, F pull is the extubation force, F friction is the friction force, P slurry is the static pressure of the slurry, A is the surface area of ​​the pressure surface (103), m is the mass of the grouting auxiliary device, and a is the acceleration.

8. The grouting auxiliary system according to claim 7, characterized in that: When the hole to be grouted is set up tilted, the stress state of the grouting auxiliary device is expressed as: F pull -F friction +P slurry *A+mgsinθ=m*a When the speed is constant, a=0, the stress state of the grouting auxiliary device is expressed as: F pull =F friction -P slurry *A-mgsinθ Where θ is the inclination angle of the hole to be grouting.

9. The grouting auxiliary system according to claim 8, characterized in that: Calculate the moving speed of the grouting auxiliary device; When the hole to be grouted is set horizontally, the moving speed of the grouting auxiliary device is expressed as: When the hole to be grouted is set horizontally, the moving speed of the grouting auxiliary device is expressed as: Here, μ is the coefficient of friction.

10. An anchor bolt installation method, characterized in that: include: Place the grouting auxiliary device into the hole to be grouted; Carry out grouting in the holes to be grouted; Apply a pulling force F to the grouting auxiliary device pull , the thrust and pulling force F of the slurry pull Under the action of, the grouting auxiliary device moves toward the hole opening close to the hole to be grouting; Adjust the pulling force and the moving speed of the grouting auxiliary device according to the horizontal state or the tilted state; When the grouting of the hole to be grouted is completed, the anchor rod is inserted into the hole to be grouting.

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