Umbrella-type hollow grouting anchor rod bundle device for grouting extremely-soft bottom plate and using method of umbrella-type hollow grouting anchor rod bundle device

Abstract

The invention discloses an ultra-soft bottom plate grouting umbrella type hollow grouting anchor rod bundle device which comprises a tray and a multi-pipe connector, a circular hole is formed in the middle of the tray, and inclined holes are formed in the portion, located around the circular hole, in the tray. According to the umbrella-type hollow grouting anchor rod bundle device for grouting of the extremely-soft bottom plate and the using method, the hollow grouting anchor rod bundle device is adopted, the interior of a grouting anchor rod can be fully grouted, and a soft stratum below the bottom plate of a roadway can be fully filled with a grouting material, so that the supporting strength of the bottom plate is effectively improved, and the overall structural strength of the roadway is improved; the umbrella type grouting design is adopted, a grouting umbrella is formed around the grouting anchor rod, grouting materials can evenly permeate to surrounding stratums, uniformity and fullness of the grouting effect are guaranteed, the bearing capacity of the stratums is effectively improved, a roadway bottom plate can be effectively reinforced, and sedimentation and collapse of soft stratums are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering support, and in particular to an extremely soft bottom plate grouting umbrella-type hollow grouting anchor bundle device and a use method thereof. Background Art

[0002] Grouting anchor is a commonly used support device in tunnel support structure, which is of great significance to maintaining the long-term stability of tunnel and surrounding rock and the safe production of coal mine. With the gradual deepening of coal mining, the existence of extremely soft floor is a common and serious problem. Extremely soft floor usually refers to the floor condition in coal rock tunnel, where the stratum is muddy, weak, has low shear strength and insufficient bearing capacity. This kind of floor is prone to geological disasters such as subsidence and landslide during long-term mining and use, which seriously threatens the stability and safety of the tunnel.

[0003] Traditional support methods, especially grouting anchor rods, have significant problems such as insufficient load transfer, poor grouting effect, and poor structural safety when applied to extremely soft base plates. Due to the particularity of the soft base plate, the grouting effect of traditional grouting anchor rods is difficult to control and it is difficult to stably transfer the load in the tunnel. Faced with sudden pressure in the tunnel, the soft base plate is prone to settlement and collapse, which affects the tunnel structure and increases safety hazards. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an extremely soft bottom plate grouting umbrella-type hollow grouting anchor bundle device and a use method, which solves the problem of insufficient structural strength of traditional grouting anchors after grouting.

[0005] To achieve the above objectives, the present invention is implemented by the following technical solutions: an extremely weak bottom plate grouting umbrella-type hollow grouting anchor bundle device, comprising a tray and a multi-tube connector, a circular hole is opened in the middle of the tray, and inclined holes are opened inside the tray and around the circular hole;

[0006] The multi-tube connector comprises an embedded slurry flow distribution device, a grouting hose, a lock, a main valve and a sub-valve.

[0007] Preferably, the circular holes are vertical, and the number of the inclined holes is six, and the inclination angle of the inclined holes is 45°.

[0008] Preferably, there is one main valve and seven sub-valves, and the interior of the embedded slurry diversion device is divided into two layers, the lower layer is the slurry pipeline controlled by the main valve, and the upper layer is the slurry pipeline controlled by each sub-valves.

[0009] Preferably, the number of the grouting hoses is seven, and the bottom end of the grouting hose is connected to the back side of the embedded slurry diversion device, and the lock is located on the surface of the grouting hose.

[0010] Preferably, the main valve and the branch valve are both fixedly connected to the surface of the embedded slurry diversion device, and the tray is a steel alloy disc.

[0011] Preferably, one side of the multi-tube connector is connected to a high-pressure pump, and a hollow grouting anchor is provided inside the tray, one end of the grouting hose is sleeved on the surface of the hollow grouting anchor, and the hollow grouting anchor is connected to the tray through a nut.

[0012] Preferably, the hollow grouting anchor rod is made of alloy steel, is hollow in the middle, and has uniform holes on the tube wall, and the bolt is made of alloy steel.

[0013] The present invention also discloses a method for using an extremely soft bottom plate grouting umbrella-type hollow grouting anchor bundle device, which specifically comprises the following steps:

[0014] S1. Fixing of the pallet: First, select an appropriate position and place a steel alloy disc pallet on the extremely soft bottom plate that needs to be supported. Make sure that the pallet is placed stably and firmly on the bottom plate, and that the vertical circular hole in the middle of the pallet is aligned with the position that needs to be supported;

[0015] S2. Anchor rod driving method: according to the placement of the pallet, drill holes into the extremely weak bottom plate through the 7 holes on the pallet, and then insert the hollow grouting anchor rod made of alloy steel into the circular hole in the center of the pallet in turn according to the required support length and position, and use alloy steel bolts to fix the hollow grouting anchor rod to the pallet to ensure that the anchor rod is firmly fixed on the pallet;

[0016] S3. Access of multi-tube connector: Connect the grouting hose of the multi-tube connector to the upper end of the hollow grouting anchor rod, ensure that the interlocking device is installed intact to prevent leakage of grouting materials, open the main valve and each sub-valve to ensure that the slurry can flow to the hollow grouting anchor rod to complete the grouting;

[0017] S4, operation of the high-pressure pump: connect the connector of the multi-tube connector to the outlet pipe of the high-pressure pump, start the high-pressure pump, and transport the grouting material to the inside of the hollow grouting anchor rod through the pipe to perform grouting operation;

[0018] S5. Grouting operation and monitoring: During the grouting operation, it is necessary to monitor the flow and pressure of the grouting material to ensure that the grouting effect meets the expected requirements. If necessary, the grouting flow and pressure can be adjusted in time to ensure the uniformity and fullness of the grouting.

[0019] Beneficial Effects

[0020] The present invention provides an umbrella-type hollow grouting anchor bundle device for grouting extremely weak bottom plates and a method for using the same. Compared with the prior art, the device has the following beneficial effects: the umbrella-type hollow grouting anchor bundle device for grouting extremely weak bottom plates and a method for using the same have a circular hole in the middle of a tray, and inclined holes are provided inside the tray and around the circular hole; the multi-tube connector includes an embedded slurry diversion device, a grouting hose, a lock, a main valve and a sub-valve, the circular hole is vertical, and there are six inclined holes, and the inclination angle of the inclined hole is 45°. The hollow grouting anchor bundle device is used, and the interior of the grouting anchor can be fully grouted, so that the grouting material can fully fill the soft stratum under the bottom plate of the tunnel, thereby effectively increasing the bottom plate. The supporting strength is improved, and the overall structural strength of the tunnel is improved. The umbrella grouting design is adopted. A grouting umbrella is formed around the grouting anchor, which can evenly penetrate the grouting material into the surrounding strata, ensuring the uniformity and fullness of the grouting effect, effectively improving the bearing capacity of the strata, and can effectively reinforce the tunnel floor to prevent the settlement and collapse of the weak strata, thereby improving the stability and safety of the tunnel, reducing the occurrence of geological disasters, and ensuring the safety of coal mine production. The grouting anchor bundle device has a simple structure and is easy to operate. It can quickly and efficiently complete the grouting operation, saving construction time and labor costs, and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the internal structure of the tray of the present invention;

[0022] Figure 2 A top view of the tray structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the multi-tube connector of the present invention;

[0024] Figure 4 This is a diagram showing the connection status of the hollow grouting anchor rod of the present invention.

[0025] In the figure: 1-tray, 2-multi-tube connector, 21-embedded slurry diversion device, 22-grouting hose, 23-lock, 24-main valve, 25-sub-valve, 3-circular hole, 4-inclined hole, 5-high-pressure pump, 6-hollow grouting anchor, 7-nut. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-4 The present invention provides a technical solution: an extremely weak bottom plate grouting umbrella-type hollow grouting anchor bundle device, comprising a tray 1 and a multi-tube connector 2, a circular hole 3 is opened in the middle of the tray 1, and an inclined hole 4 is opened inside the tray 1 and around the circular hole 3;

[0028] The multi-tube connector 2 includes an embedded slurry flow distribution device 21 , a grouting hose 22 , a lock 23 , a main valve 24 and a sub-valve 25 .

[0029] In the present invention, the circular hole 3 is vertical, and the number of the inclined holes 4 is six, and the inclined angle of the inclined holes 4 is 45°.

[0030] In the present invention, there is one main valve 24 and seven branch valves 25, and the interior of the embedded slurry diversion device 21 is divided into two layers, the lower layer is the slurry pipeline controlled by the main valve 24, and the upper layer is the slurry pipeline controlled by each branch valve 25.

[0031] In the present invention, the number of grouting hoses 22 is set to seven, and the bottom end of the grouting hose 22 is connected to the back of the embedded slurry diversion device 21, and the lock 23 is located on the surface of the grouting hose 22. The lock 23 adopts a pulling and tightening method to connect the multi-tube connector 2 to the grouting hose 23.

[0032] In the present invention, the main valve 24 and the branch valve 25 are both fixedly connected to the surface of the embedded slurry diversion device 21, and the tray 1 is a steel alloy disc.

[0033] In the present invention, one side of the multi-tube connector 2 is connected to a high-pressure pump 5, and a hollow grouting anchor 6 is arranged inside the tray 1, one end of the grouting hose 22 is sleeved on the surface of the hollow grouting anchor 6, and the hollow grouting anchor 6 is connected to the tray 1 through a nut 7.

[0034] In the present invention, the hollow grouting anchor rod 6 is made of alloy steel, is hollow in the middle, has uniform holes on the wall, and the bolt 7 is made of alloy steel.

[0035] The present invention also discloses a method for using an extremely soft bottom plate grouting umbrella-type hollow grouting anchor bundle device, which specifically comprises the following steps:

[0036] S1. Fixing of the tray 1: First, select an appropriate position and place the steel alloy disc tray 1 on the extremely weak bottom plate that needs to be supported, ensuring that the tray 1 is placed stably and firmly on the bottom plate, and the vertical circular hole 3 in the middle of the tray 1 is aligned with the position that needs to be supported;

[0037] S2. Anchor rod driving method: according to the placement of the tray 1, the extremely weak bottom plate is drilled through the 7 holes on the tray 1, and then the hollow grouting anchor rod 6 made of alloy steel is inserted into the circular hole 3 in the center of the tray 1 in turn according to the required support length and position, and the hollow grouting anchor rod 6 is fixedly connected to the tray 1 with the bolt 7 made of alloy steel to ensure that the anchor rod is firmly fixed on the tray 1;

[0038] S3, access to the multi-tube connector 2: connect the grouting hose 22 of the multi-tube connector 2 to the upper end of the hollow grouting anchor rod 6, ensure that the interlocking device 23 is installed intact to prevent leakage of the grouting material, open the main valve 24 and each sub-valve 25, and ensure that the slurry can flow to the hollow grouting anchor rod 6 to complete the grouting;

[0039] S4, operation of the high-pressure pump: connect the connector of the multi-tube connector 2 to the outlet pipe of the high-pressure pump 5, start the high-pressure pump 5, and transport the grouting material to the inside of the hollow grouting anchor rod 6 through the pipe to perform grouting operation;

[0040] S4, operation of the high-pressure pump: connect the connector of the multi-tube connector 2 to the outlet pipe of the high-pressure pump, start the high-pressure pump, and transport the grouting material to the inside of the hollow grouting anchor rod through the pipe to perform grouting operation;

[0041] S5. Grouting operation and monitoring: During the grouting operation, it is necessary to monitor the flow and pressure of the grouting material to ensure that the grouting effect meets the expected requirements. If necessary, the grouting flow and pressure can be adjusted in time to ensure the uniformity and fullness of the grouting.

[0042] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device, comprising a tray (1) and a multi-tube connector (2), characterized in that: A circular hole (3) is provided in the middle of the tray (1), and inclined holes (4) are provided inside the tray (1) and around the circular hole (3); The multi-tube connector (2) comprises an embedded slurry flow distribution device (21), a grouting hose (22), a lock (23), a main valve (24) and a sub-valve (25).

2. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1 is characterized by: The circular hole (3) is vertical, and the number of the inclined holes (4) is six, and the inclination angle of the inclined holes (4) is 45°.

3. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1, characterized in that: The number of the main valve (24) is one, and the number of the sub-valves (25) is seven, and the interior of the embedded slurry diversion device (21) is divided into two layers, the lower layer is the slurry pipeline controlled by the main valve (24), and the upper layer is the slurry pipeline controlled by each sub-valves (25).

4. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1, characterized in that: The number of the grouting hoses (22) is seven, and the bottom end of the grouting hose (22) is connected to the back side of the embedded slurry diversion device (21), and the lock (23) is located on the surface of the grouting hose (22).

5. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1, characterized in that: The main valve (24) and the branch valve (25) are both fixedly connected to the surface of the embedded slurry diversion device (21), and the tray (1) is a steel alloy disc.

6. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1, characterized in that: One side of the multi-tube connector (2) is connected to a high-pressure pump (5), and a hollow grouting anchor rod (6) is arranged inside the tray (1), one end of the grouting hose (22) is sleeved on the surface of the hollow grouting anchor rod (6), and the hollow grouting anchor rod (6) is connected to the tray (1) via a nut (7).

7. The extremely soft bottom plate grouting umbrella type hollow grouting anchor bundle device according to claim 1, characterized in that: The hollow grouting anchor rod (6) is made of alloy steel, is hollow in the middle, and has uniform holes on the wall; the bolt (7) is made of alloy steel.

8. A method for using an umbrella-type hollow grouting anchor bundle device for extremely weak bottom plate grouting, characterized in that: The specific steps include: S1. Fixing of the tray (1): First, select an appropriate position and place the steel alloy disc tray (1) on the extremely soft bottom plate that needs to be supported, ensuring that the tray (1) is placed stably and firmly on the bottom plate, and that the vertical circular hole (3) in the middle of the tray (1) is aligned with the position that needs to be supported; S2. Anchor rod driving method: according to the placement of the pallet (1), the extremely weak bottom plate is drilled through the 7 holes on the pallet (1), and then the hollow grouting anchor rod (6) made of alloy steel is inserted into the circular hole (3) in the center of the pallet (1) in turn according to the required support length and position, and the hollow grouting anchor rod (6) is fixedly connected to the pallet (1) using bolts (7) made of alloy steel to ensure that the anchor rod is firmly fixed on the pallet (1); S3. Connecting the multi-tube connector (2): Connect the grouting hose (22) of the multi-tube connector (2) to the upper end of the hollow grouting anchor rod (6), ensure that the interlocking device (23) is installed intact to prevent leakage of the grouting material, open the main valve (24) and each sub-valve (25), and ensure that the slurry can flow to the hollow grouting anchor rod (6) to complete the grouting; S4, operation of the high-pressure pump: connecting the connector of the multi-tube connector (2) to the outlet pipe of the high-pressure pump (5), starting the high-pressure pump (5), and conveying the grouting material to the inside of the hollow grouting anchor rod (6) through the pipe to perform grouting operation; S5. Grouting operation and monitoring: During the grouting operation, it is necessary to monitor the flow and pressure of the grouting material to ensure that the grouting effect meets the expected requirements. If necessary, the grouting flow and pressure can be adjusted in time to ensure the uniformity and fullness of the grouting.

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