Grouting device capable of rapidly sealing roadway shallow surrounding rock fractures and using method

Abstract

The invention relates to a grouting device capable of quickly sealing roadway shallow surrounding rock cracks. The grouting device comprises a grouting pipe body, a grout stopping device, a first pipeline, a second pipeline, an opening isolation device and a middle isolation device. The grouting pipe body is internally provided with a middle isolation device which is coaxially distributed with the grouting pipe body, the front half portion of the grouting pipe body is internally provided with a grout stopping device, an opening isolation device is connected with the front end face of the grouting pipe body, the first pipeline and the second pipeline are embedded in the grouting pipe body, and the rear end face of the first pipeline is located in front of the middle isolation device and communicated with the front half portion of the grouting pipe body. The rear end face of the second pipeline is located in the rear half section of the grouting pipe body after passing through the middle isolation device. The using method comprises the three steps of grouting hole arrangement, plugging and positioning and plugging and positioning. Compared with traditional grouting plugging equipment and technology, the grouting plugging equipment and technology can achieve rapid sealing of surrounding rock cracks of the shallow portion of the roadway, slurry leakage is avoided, and therefore the broken surrounding rock of the roadway is strengthened, and the bearing and positioning capacity is good after grouting plugging.

Description

Technical Field

[0001] The invention relates to a grouting device and a use method for quickly sealing shallow surrounding rock cracks in a tunnel, belonging to the technical field of grouting and plugging construction equipment. Background Art

[0002] The broken surrounding rock of underground coal mine tunnels is often repaired or reinforced by grouting. Due to the serious crushing of the tunnel surrounding rock, the slurry will leak out with the cracks when grouting is directly used, and the grouting effect cannot be achieved. For this reason, concrete is generally sprayed on the tunnel surface to form a concrete spray layer to avoid slurry leakage, which increases the tunnel repair process and cost. At the same time, the traditional grouting plugging equipment is also very easy to cause the bearing capacity of the plugging equipment to decrease and the plugging structure to be damaged due to the deformation of the geological structure during operation, which makes it difficult to effectively meet the needs of actual construction operations. In response to this problem, the use of The process of concrete grouting and sealing operation is a process, but in the concrete shotcrete processing operation, it is often necessary to use the complicated structure of the shotcrete equipment, and at the same time, add the corrosive quick-setting agent to the concrete to meet the concrete shotcrete construction operation. As a result, on the one hand, the concrete shotcrete operation is restricted by the construction environment, resulting in many tunnel structures unable to carry out effective shotcrete operation; on the other hand, in the shotcrete operation, due to the addition of the quick-setting agent, while increasing the difficulty and cost of the shotcrete operation, the corrosive quick-setting agent is also easy to pose a greater safety hazard to the construction equipment and personnel, increasing the construction safety risk.

[0003] Therefore, in view of this situation, it is necessary to develop a plugging equipment and corresponding plugging process that can be applied to various types of tunnel structures, has simple construction technology, good equipment operation flexibility and safety. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a grouting device and method for quickly closing shallow surrounding rock cracks in a tunnel, so as to overcome the above defects and meet the needs of actual equipment operation.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises a grouting pipe body, a grouting stopper, a No. 1 pipeline, a No. 2 pipeline, an opening isolation device and a middle isolation device; wherein the grouting pipe body is a hollow tubular structure with a rectangular axial cross section, and a plurality of grouting holes are evenly distributed on the pipe wall; a middle isolation device coaxially distributed with the grouting pipe body is arranged inside the grouting pipe body, and the middle isolation device divides the grouting pipe body into two end cavities that are not connected to each other along the axis of the grouting pipe body; at the same time, a grouting stopper coaxially distributed with the grouting pipe body is arranged inside the front half of the grouting pipe body, and the grouting stopper seals the front half of the grouting pipe body The opening isolation device is connected to the front end face of the grouting pipe body and is coaxially distributed. Pipeline No. 1 and pipeline No. 2 are embedded in the grouting pipe body and are symmetrically distributed on both sides of the axis of the grouting pipe body. Pipeline No. 1 and pipeline No. 2 are distributed parallel to the axis of the grouting pipe body, and the front end faces of pipeline No. 1 and pipeline No. 2 are located outside the grouting pipe body through the grouting stopping device and the opening isolation device. The rear end face of pipeline No. 1 is located in front of the middle isolation device and is connected with the front half of the grouting pipe body. The rear end face of pipeline No. 2 is located in the rear half of the grouting pipe body after passing through the middle isolation device and is connected with the rear half of the grouting pipe body.

[0007] Furthermore, the opening isolation device and the middle isolation device are connected by a load-bearing spring coaxially distributed with the grouting pipe body, and the distance between the opening isolation device and the middle isolation device is 30%-60% of the effective length of the grouting pipe body.

[0008] Furthermore, the opening isolation device and the middle isolation device include an elastic sealing ring, an elastic sealing block, a load-bearing spring piece, and a buffer head. The elastic sealing block is a cylindrical structure coaxially distributed with the grouting pipe body, and the elastic sealing block is abutted and slidably connected to the inner side surface of the grouting pipe body. The front half and the rear half of the side wall of the elastic sealing block are each provided with an elastic sealing ring coaxially distributed therewith, and are abutted and slidably connected to the inner side surface of the grouting pipe body through the elastic sealing ring. At the same time, the side wall of the elastic sealing block is provided with at least three load-bearing grooves evenly distributed around the axis of the elastic sealing block, and each load-bearing groove is provided with a load-bearing spring piece. The load-bearing spring piece is a plate-like structure with a triangular or circular axial cross-section, one end of which is hinged to the bottom of the load-bearing groove by an elastic hinge, and the other end is abutted and slidably connected to the bottom of the load-bearing groove. At the same time, the outer side surface of the load-bearing spring piece exceeds the outer side surface of the elastic sealing block by 0-5 millimeters, and is abutted against and slidably connected to the inner side surface of the grouting pipe body, the elastic sealing block is provided with a through hole parallel to its axis, and the No. 1 pipeline and the No. 2 pipeline are connected to the elastic sealing block through the through hole, and the through hole wall is provided with at least two elastic sealing rings distributed along the axis direction of the through hole, and is abutted against and slidably connected to the outer side surfaces of the No. 1 pipeline and the No. 2 pipeline through the elastic sealing ring, and a buffer head coaxially distributed therewith is provided at the front end face and the rear end face position of the elastic sealing block, the buffer head is a spherical crown structure, and its rear end face is connected to the elastic sealing block through a spring, and the spacing is not less than 5 mm, and at the same time, the side wall of the buffer head is abutted against and slidably connected to the inner side surface of the grouting pipe body, and a guide groove parallel to the axis of the through hole is provided at the corresponding position of the buffer head and the through hole, which is coated on the outside of the No. 1 pipeline and the No. 2 pipeline through the guide groove, and is slidably connected to the No. 1 pipeline and the No. 2 pipeline.

[0009] Furthermore, the grouting stop device includes an elastic pressure plate, an elastic sealing plug, an adjusting column, and a positioning anchor rod, wherein the elastic sealing plug is a columnar structure with a rectangular axial cross-section, embedded in the front end face of the grouting pipe body, coaxially distributed with the grouting pipe body, and abutted against and slidably connected with the inner side of the grouting pipe body; the adjusting column is a cylindrical screw structure coaxially distributed with the elastic sealing plug; the front half of the adjusting column is embedded in the elastic sealing plug and is threadedly connected to the elastic sealing plug; the elastic pressure plate is a disc-shaped structure coaxially distributed with the elastic sealing plug; the middle part of the elastic pressure plate is provided with a coaxial The elastic sealing plug is provided with two connecting holes evenly distributed around its axis, and the No. 1 pipeline and the No. 2 pipeline are respectively connected to the elastic sealing plug through the connecting holes, and the front end surface thereof is located outside the grouting pipe body, and at the same time, the elastic pressure plate used for the No. 1 pipeline and the No. 2 pipeline is provided with adjusting grooves evenly distributed around the axis of the elastic pressure plate, and the elastic pressure plate is provided with at least three connecting anchor holes evenly distributed around its axis, and a positioning anchor rod is provided in each anchor hole, and the elastic pressure plate is connected to the rock wall through the positioning anchor rod.

[0010] Furthermore, the elastic pressure plate includes a positioning section, an elastic deformation section and a connecting spring, wherein the elastic deformation section is a spherical crown structure, and the elastic deformation section is provided with a connecting screw hole coaxially distributed therewith, the positioning section is coated on the outside of the elastic deformation section and coaxially distributed therewith, and at the same time, the lower end surface of the elastic deformation section is flush with the lower end surface of the positioning section, and are jointly distributed in the same plane which forms an angle of 45°-90° with the axis of the grouting pipe body, and at the same time, the adjustment groove is embedded in the positioning section and is a circular arc groove structure coaxially distributed with the elastic deformation section, the axis of the connecting spring is perpendicularly distributed to the axis of the elastic deformation section, and at the same time, the upper end surfaces of two adjacent positioning anchor rods are connected by a connecting spring.

[0011] Furthermore, the lower half of the grouting pipe body is provided with a plurality of reinforcing ribs evenly distributed around its axis and a positioning ring, the reinforcing ribs are any one of a triangular, isosceles trapezoidal and fan-shaped structure, and the surface of the reinforcing ribs forms an angle of 30°-90° with the axis of the grouting pipe body, and each reinforcing rib is distributed in a spiral structure around the axis of the grouting pipe body, the positioning ring is coated on the outside of the grouting pipe body and is coaxially distributed with the grouting pipe body, and the lower end face of the positioning ring is against the upper end face of the topmost reinforcing rib, and the outer diameter of the positioning ring is at least 5 mm larger than the outer diameter of the grouting pipe body, and the outer side surface of the positioning ring is flush with the outer side surface of the reinforcing rib.

[0012] A construction method of a grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises the following steps:

[0013] S1, grouting hole setting, first according to the needs of grouting operation, grouting holes are processed and prepared on the rock layer wall, and the spacing between adjacent grouting holes is 1-10 meters, and the axis of the grouting hole is at an angle of 30°-90° with the rock wall; at the same time, according to the structural size and number of grouting holes, the grouting pipe body, grouting stop device, No. 1 pipeline, No. 2 pipeline, opening isolation device, and middle isolation device structure are respectively set and assembled to obtain a number of grouting plugging devices that meet the use needs;

[0014] S2, plugging and positioning, first add a resin anchor to the bottom of the grouting hole opened in step S1, then embed the grouting plugging device assembled in step S1 into the grouting hole and coaxially distribute it between the grouting holes, and at the same time, make the lower end face of the grouting pipe body of the grouting plugging device be bonded and fixed between the borehole wall by the resin anchor, so as to complete the preliminary positioning of the grouting plugging device; then adjust the grouting stop device, on the one hand, the grouting stop device seals and plugs the end face of the grouting pipe body, and at the same time, adjusts and sets the gap between the grouting pipe body and the borehole wall; on the other hand, the grouting stop device is used to realize the enhanced positioning of the grouting pipe body between the rock wall of the grouting hole;

[0015] S3, plugging and positioning, after completing step S2, first inject the foaming material into the front half of the grouting pipe body through pipeline No. 1, and overflow from the grouting holes on the wall of the front half of the grouting pipe body to the gap between the front half of the grouting pipe body and the grouting holes, and after the foaming material expands in the gap between the grouting pipe body and the grouting holes, compress the shallow surrounding rock cracks, so as to achieve the sealing of the shallow surrounding rock cracks of the corresponding tunnel by the front half of the grouting pipe body; then inject the grouting material into the rear half of the grouting pipe body through pipeline No. 2, and overflow from the grouting holes on the wall of the rear half of the grouting pipe body to the gap between the rear half of the grouting pipe body and the grouting holes, and make the grouting material penetrate into the cracks in the rock wall of the grouting hole under the driving pressure, so as to achieve the sealing of the deep surrounding rock cracks of the corresponding tunnel by the rear half of the grouting pipe body; the grouting and plugging operation can be completed.

[0016] Furthermore, in the step S1, when configuring the grouting and plugging device according to the grouting holes, firstly, each grouting hole is assigned the same construction operation number; then, a corresponding grouting and plugging device is allocated to each grouting hole, and each grouting and plugging device is assigned a construction operation number that matches the grouting hole.

[0017] The equipment of the present invention has a simple structure, strong environmental adaptability, good versatility and construction flexibility, and compared with traditional grouting and plugging equipment and processes, it can quickly close shallow surrounding rock cracks in the tunnel and avoid leakage of slurry, thereby strengthening the broken surrounding rock of the tunnel. It has good bearing and positioning capabilities after grouting and plugging, which can increase the risk of failure of the plugging structure due to geological structure deformation, and effectively improve the reliability and stability of the plugging operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the partial structure of the opening isolation device and the middle isolation device;

[0021] Figure 3 The figure is a flow chart of the method for using the present invention. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figure 1 and 2As shown, a grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises a grouting pipe body 1, a grouting stop device 2, a No. 1 pipeline 3, a No. 2 pipeline 4, an opening isolation device 5, and a middle isolation device 6; wherein the grouting pipe body 1 is a hollow tubular structure with a rectangular axial cross section, and a plurality of grouting holes 7 are evenly distributed on the pipe wall; a middle isolation device 6 coaxially arranged with the grouting pipe body 1 is arranged inside the grouting pipe body 1, and the middle isolation device 6 divides the grouting pipe body 1 into two end cavities that are not connected to each other along the axis of the grouting pipe body 1; at the same time, a grouting stop device 2 coaxially arranged with the grouting pipe body 1 is arranged inside the front half of the grouting pipe body 1, and the grouting stop device 2 seals the front half of the grouting pipe body 1 The opening isolation device 5 is connected to the front end face of the grouting pipe body 1 and is coaxially distributed. Pipeline No. 1 3 and pipeline No. 2 4 are both embedded in the grouting pipe body 1 and symmetrically distributed on both sides of the axis of the grouting pipe body 1. Pipeline No. 1 3 and pipeline No. 2 4 are both distributed parallel to the axis of the grouting pipe body 1, and the front end faces of pipeline No. 1 3 and pipeline No. 2 4 are both located outside the grouting pipe body 1 through the grouting stopping device 2 and the opening isolation device 5. The rear end face of pipeline No. 1 3 is located in front of the middle isolation device 6 and is connected with the front half of the grouting pipe body 1. The rear end face of pipeline No. 2 4 is located in the rear half of the grouting pipe body 1 after passing through the middle isolation device 6 and is connected with the rear half of the grouting pipe body 1.

[0024] In this embodiment, the opening isolation device 5 and the middle isolation device 6 are connected by a load-bearing spring 8 coaxially distributed with the grouting pipe body 1, and the distance between the opening isolation device 5 and the middle isolation device 6 is 30%-60% of the effective length of the grouting pipe body 1.

[0025] The load-bearing spring provided can utilize the elastic deformation capacity of the load-bearing spring to adjust the central isolation device along the axis direction of the grouting pipe body due to the pressure change of the grouting material during the grouting process, thereby adjusting and balancing the grouting pressure.

[0026] It is emphasized that the opening isolation device 5 and the middle isolation device 6 include an elastic sealing ring 101, an elastic blocking block 102, a bearing spring 103, and a buffer head 104. The elastic blocking block 102 is a cylindrical structure coaxially distributed with the grouting pipe body 1. The elastic blocking block 102 is abutted against and slidably connected to the inner side of the grouting pipe body 1. The front half and the rear half of the side wall of the elastic blocking block 102 are both provided with an elastic sealing ring 101 coaxially distributed therewith, and the elastic sealing ring 101 is connected to the inner side of the grouting pipe body 1 through the elastic sealing ring The sides are abutted and slidably connected. At the same time, the side wall of the elastic blocking block 102 is provided with at least three bearing grooves 105 uniformly distributed around the axis of the elastic blocking block 102. Each bearing groove 105 is provided with a bearing spring piece 103. The bearing spring piece 103 is a plate-like structure with a triangular or circular axial cross-section. One end of the bearing spring piece 103 is hinged to the bottom of the bearing groove 105 through an elastic hinge, and the other end is abutted and slidably connected to the bottom of the bearing groove 105. At the same time, the outer side of the bearing spring piece 103 exceeds the outer side of the elastic blocking block 102 by 0-5 mm The elastic sealing block 102 is provided with a through hole 106 parallel to its axis, and the No. 1 pipeline 3 and the No. 2 pipeline 4 are connected to the elastic sealing block 102 through the through hole 106. The through hole 106 wall is provided with at least two elastic sealing rings 101 distributed along the axis direction of the through hole 106, and the elastic sealing rings 101 are used to abut and slide against the outer side of the No. 1 pipeline 3 and the No. 2 pipeline 4. The front end and rear end of the elastic sealing block 102 are both provided with a The buffer head 104 is coaxially distributed with it, and the buffer head 104 is a spherical crown structure. The rear end face is connected to the elastic sealing block 102 by a spring 107, and the spacing is not less than 5 mm. At the same time, the side wall of the buffer head 104 is abutted against and slidably connected to the inner side of the grouting pipe body 1, and a guide groove 108 parallel to the axis of the through hole 106 is provided at the corresponding position of the buffer head 104 and the through hole 106. The guide groove 108 is coated on the outside of pipeline No. 1 3 and pipeline No. 2 4, and is slidably connected to pipeline No. 1 3 and pipeline No. 2 4.

[0027] The load-bearing spring sheet provided can effectively improve the gap between the elastic sealing block and the inner side of the wall of the grouting pipe body, thereby improving the stability of the sealing positioning of the elastic sealing block in the grouting pipe body; at the same time, the elastic sealing ring provided can effectively improve the sealing ability of the opening isolation device and the middle isolation device on the grouting pipe body; in addition, during operation, the buffer head and the spring can be used to further achieve uniform distribution of the grouting material and uniform dispersion of the pressure of the grouting material, thereby reducing the influence of the grouting material delivery pressure on the elastic sealing block during the grouting operation.

[0028] At the same time, the grouting device 2 includes an elastic pressure plate 21, an elastic sealing plug 22, an adjusting column 23, and a positioning anchor rod 24, wherein the elastic sealing plug 22 is a columnar structure with a rectangular axial cross-section, embedded in the front end face of the grouting pipe body 1, coaxially distributed with the grouting pipe body 1, and abutted against and slidably connected with the inner side of the grouting pipe body 1, and the adjusting column 23 is a cylindrical screw structure coaxially distributed with the elastic sealing plug 22, the front half of the adjusting column 23 is embedded in the elastic sealing plug 22 and is threadedly connected with the elastic sealing plug 22, the elastic pressure plate 21 is a disc-shaped structure coaxially distributed with the elastic sealing plug 22, and the middle part of the elastic pressure plate 21 is provided with a connecting screw coaxially distributed with it Hole 25 is covered on the outside of the rear half of the adjusting column 23 through the connecting screw hole 25 and is connected to the adjusting column 23 through a thread. The elastic sealing plug 22 is further provided with two connecting holes 25 evenly distributed around its axis. Pipeline No. 1 3 and pipeline No. 2 4 are respectively connected to the elastic sealing plug 22 through the connecting holes 25, and the front end faces thereof are located outside the grouting pipe body 1. At the same time, the elastic pressure plate 21 used for pipeline No. 1 3 and pipeline No. 2 4 is provided with an adjusting groove 26 evenly distributed around the axis of the elastic pressure plate 21. The elastic pressure plate 21 is further provided with at least three connecting anchor holes 27 evenly distributed around its axis, and a positioning anchor rod 24 is provided in each anchor hole 27. The elastic pressure plate 21 is connected to the rock wall through the positioning anchor rod 24.

[0029] The set elastic pressure plate can realize the connection and positioning between the positioning anchor rod and the rock wall, improve the positioning stability of the Zhijiang device, and also improve the ability of the grouting device to carry and position the grouting pipe body. At the same time, the adjustment column can be used to flexibly adjust the distance between the elastic pressure plate and the elastic sealing plug according to the needs of use. The smaller the distance between the elastic sealing plug and the elastic pressure plate, the greater the pressure on the elastic pressure plate, the greater the prestress when the elastic pressure plate is connected to the rock wall, and the greater the positioning force. However, when the geological structure of the rock wall changes, the elastic deformation ability of the elastic pressure plate becomes worse. Therefore, the purpose of adjusting the overall positioning force and bearing force of the equipment is achieved by adjusting the distance between the elastic sealing plug and the elastic pressure plate.

[0030] It should be noted that the elastic pressure plate 21 includes a positioning section 211, an elastic deformation section 212 and a connecting spring 213, wherein the elastic deformation section 212 is a spherical crown structure, and the elastic deformation section 212 is provided with a connecting screw hole 25 coaxially distributed therewith, the positioning section 211 is coated on the outside of the elastic deformation section 212 and coaxially distributed with the elastic deformation section 212, and at the same time, the lower end surface of the elastic deformation section 212 is flush with the lower end surface of the positioning section 211, and are jointly distributed in the same plane with an angle of 45°-90° with the axis of the grouting pipe body 1, and at the same time, the adjustment groove 26 is embedded in the positioning section 211, and is a circular arc groove structure coaxially distributed with the elastic deformation section 212, the axis of the connecting spring 213 is perpendicular to the axis of the elastic deformation section 212, and at the same time, the upper end surfaces of two adjacent positioning anchor rods 24 are connected by a connecting spring 213.

[0031] In addition, the lower half of the grouting pipe body 1 is provided with a plurality of reinforcing ribs 11 and a positioning ring 12 evenly distributed around its axis, and the reinforcing ribs 11 are any one of a triangular, isosceles trapezoidal and fan-shaped structure, and at the same time, the plate surface of the reinforcing ribs 11 forms an angle of 30°-90° with the axis of the grouting pipe body, and each reinforcing rib 11 is distributed in a spiral structure around the axis of the grouting pipe body 1, and the positioning ring 12 is coated on the outside of the grouting pipe body 1 and coaxially distributed with the grouting pipe body 1, and the lower end face of the positioning ring 12 is against the upper end face of the topmost reinforcing rib 11, and the outer diameter of the positioning ring 12 is at least 5 mm larger than the outer diameter of the grouting pipe body 1, and the outer side surface of the positioning ring 12 is flush with the outer side surface of the reinforcing rib 11.

[0032] The provided reinforcing rib plate can improve the structural stability when the grouting pipe body and the resin anchor are connected; at the same time, the position of the resin anchor is limited and blocked by the provided positioning ring, thereby improving the positioning accuracy of the distribution position when the resin anchor is connected to the grouting pipe body.

[0033] like Figure 3 As shown, a construction method of a grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises the following steps:

[0034] S1, grouting hole setting, first according to the needs of grouting operation, grouting holes are processed and prepared on the rock layer wall, and the spacing between adjacent grouting holes is 1-10 meters, and the axis of the grouting hole is at an angle of 30°-90° with the rock wall; at the same time, according to the structural size and number of grouting holes, the grouting pipe body, grouting stop device, No. 1 pipeline, No. 2 pipeline, opening isolation device, and middle isolation device structure are respectively set and assembled to obtain a number of grouting plugging devices that meet the use needs;

[0035] S2, plugging and positioning, first add a resin anchor to the bottom of the grouting hole opened in step S1, then embed the grouting plugging device assembled in step S1 into the grouting hole and coaxially distribute it between the grouting holes, and at the same time, make the lower end face of the grouting pipe body of the grouting plugging device be bonded and fixed between the borehole wall by the resin anchor, so as to complete the preliminary positioning of the grouting plugging device; then adjust the grouting stop device, on the one hand, the grouting stop device seals and plugs the end face of the grouting pipe body, and at the same time, adjusts and sets the gap between the grouting pipe body and the borehole wall; on the other hand, the grouting stop device is used to realize the enhanced positioning of the grouting pipe body between the rock wall of the grouting hole;

[0036] S3, plugging and positioning, after completing step S2, first inject the foaming material into the front half of the grouting pipe body through pipeline No. 1, and overflow from the grouting holes on the wall of the front half of the grouting pipe body to the gap between the front half of the grouting pipe body and the grouting holes, and after the foaming material expands in the gap between the grouting pipe body and the grouting holes, compress the shallow surrounding rock cracks, so as to achieve the sealing of the shallow surrounding rock cracks of the corresponding tunnel by the front half of the grouting pipe body; then inject the grouting material into the rear half of the grouting pipe body through pipeline No. 2, and overflow from the grouting holes on the wall of the rear half of the grouting pipe body to the gap between the rear half of the grouting pipe body and the grouting holes, and make the grouting material penetrate into the cracks in the rock wall of the grouting hole under the driving pressure, so as to achieve the sealing of the deep surrounding rock cracks of the corresponding tunnel by the rear half of the grouting pipe body; the grouting and plugging operation can be completed.

[0037] In this embodiment, in the step S1, when configuring the grouting and plugging device according to the grouting holes, firstly, each grouting hole is assigned the same construction operation number; then, a corresponding grouting and plugging device is allocated to each grouting hole, and each grouting and plugging device is assigned a construction operation number matching the grouting hole.

[0038] The equipment of the present invention has a simple structure, strong environmental adaptability, good versatility and construction flexibility, and compared with traditional grouting and plugging equipment and processes, it can quickly close shallow surrounding rock cracks in the tunnel and avoid leakage of slurry, thereby strengthening the broken surrounding rock of the tunnel. It has good bearing and positioning capabilities after grouting and plugging, which can increase the risk of failure of the plugging structure due to geological structure deformation, and effectively improve the reliability and stability of the plugging operation.

[0039] It should be understood by those skilled in the art that the present invention is not limited by the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel, characterized in that: The grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises a grouting pipe body, a grouting stop device, a No. 1 pipeline, a No. 2 pipeline, an opening isolation device, and a middle isolation device; wherein the grouting pipe body is a hollow tubular structure with a rectangular axial cross-section, and a plurality of grouting holes are evenly distributed on the pipe wall; a middle isolation device coaxially distributed therewith is arranged inside the grouting pipe body, and the middle isolation device divides the grouting pipe body into two end cavities that are not connected to each other along the axis of the grouting pipe body; at the same time, a grouting stop device coaxially distributed therewith is arranged inside the front half of the grouting pipe body, and the grouting stop device seals the front half of the grouting pipe body The opening isolation device is connected to the front end face of the grouting pipe body and is coaxially distributed. The No. 1 pipeline and the No. 2 pipeline are both embedded in the grouting pipe body and symmetrically distributed on both sides of the axis of the grouting pipe body. The No. 1 pipeline and the No. 2 pipeline are both distributed parallel to the axis of the grouting pipe body, and the front end faces of the No. 1 pipeline and the No. 2 pipeline are both located outside the grouting pipe body through the grouting stopping device and the opening isolation device. The rear end face of the No. 1 pipeline is located in front of the middle isolation device and is connected to the front half of the grouting pipe body. The rear end face of the No. 2 pipeline is located in the rear half of the grouting pipe body after passing through the middle isolation device and is connected to the rear half of the grouting pipe body.

2. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 1, characterized in that: The opening isolation device and the middle isolation device are connected via a load-bearing spring coaxially distributed with the grouting pipe body. The distance between the opening isolation device and the middle isolation device is 30%-60% of the effective length of the grouting pipe body.

3. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 1 or 2, characterized in that: The opening isolation device and the middle isolation device include an elastic sealing ring, an elastic sealing block, a load-bearing spring piece, and a buffer head. The elastic sealing block is a cylindrical structure coaxially distributed with the grouting pipe body, and the elastic sealing block is abutted and slidably connected to the inner side surface of the grouting pipe body. The front half and the rear half of the side wall of the elastic sealing block are each provided with an elastic sealing ring coaxially distributed therewith, and are abutted and slidably connected to the inner side surface of the grouting pipe body through the elastic sealing ring. At the same time, the side wall of the elastic sealing block is provided with at least three load-bearing grooves evenly distributed around the axis of the elastic sealing block, and each load-bearing groove is provided with a load-bearing spring piece. The load-bearing spring piece is a plate-like structure with a triangular or circular axial cross-section, one end of which is hinged to the bottom of the load-bearing groove by an elastic hinge, and the other end is abutted and slidably connected to the bottom of the load-bearing groove. At the same time, the outer side surface of the load-bearing spring piece exceeds the outer side surface of the elastic sealing block by 0-5 mm , and is abutted against and slidably connected to the inner side surface of the grouting pipe body. The elastic sealing block is provided with a through hole parallel to its axis, and the No. 1 pipeline and the No. 2 pipeline are connected to the elastic sealing block through the through hole. The through hole wall is also provided with at least two elastic sealing rings distributed along the axis direction of the through hole, and is abutted against and slidably connected to the outer side surfaces of the No. 1 pipeline and the No. 2 pipeline through the elastic sealing ring. A buffer head coaxially distributed therewith is provided at the front end face and the rear end face position of the elastic sealing block. The buffer head is a spherical crown structure, and its rear end face is connected to the elastic sealing block through a spring, and the spacing is not less than 5 mm. At the same time, the side wall of the buffer head is abutted against and slidably connected to the inner side surface of the grouting pipe body, and a guide groove parallel to the axis of the through hole is provided at the corresponding position of the buffer head and the through hole. The guide groove is coated on the outside of the No. 1 pipeline and the No. 2 pipeline, and is slidably connected to the No. 1 pipeline and the No. 2 pipeline.

4. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 1, characterized in that: The grouting device includes an elastic pressure plate, an elastic sealing plug, an adjusting column, and a positioning anchor rod, wherein the elastic sealing plug is a columnar structure with a rectangular axial cross-section, embedded in the front end face of the grouting pipe body, coaxially distributed with the grouting pipe body, and abutted against and slidably connected with the inner side of the grouting pipe body; the adjusting column is a cylindrical screw structure coaxially distributed with the elastic sealing plug; the front half of the adjusting column is embedded in the elastic sealing plug and is connected to the elastic sealing plug through a thread; the elastic pressure plate is a disc-shaped structure coaxially distributed with the elastic sealing plug; the middle part of the elastic pressure plate is provided with a A connecting screw hole is covered on the outside of the rear half of the adjusting column and is connected to the adjusting column through a threaded connection. The elastic sealing plug is further provided with two connecting holes evenly distributed around its axis. Pipeline No. 1 and pipeline No. 2 are respectively connected to the elastic sealing plug through the connecting holes, and the front end surface thereof is located outside the grouting pipe body. At the same time, the elastic pressure plate used for pipeline No. 1 and pipeline No. 2 is provided with an adjusting groove evenly distributed around the axis of the elastic pressure plate. The elastic pressure plate is further provided with at least three connecting anchor holes evenly distributed around its axis, and a positioning anchor rod is provided in each anchor hole. The elastic pressure plate is connected to the rock wall through the positioning anchor rod.

5. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 4, characterized in that: The elastic pressure plate includes a positioning section, an elastic deformation section and a connecting spring, wherein the elastic deformation section is a spherical crown structure, and the elastic deformation section is provided with a connecting screw hole coaxially distributed therewith, the positioning section is covered on the outside of the elastic deformation section and coaxially distributed therewith, and at the same time, the lower end surface of the elastic deformation section is flush with the lower end surface of the positioning section, and they are jointly distributed in the same plane which forms an angle of 45°-90° with the axis of the grouting pipe body, and at the same time, the adjustment groove is embedded in the positioning section and is a circular arc groove structure coaxially distributed with the elastic deformation section, the axis of the connecting spring is perpendicularly distributed to the axis of the elastic deformation section, and at the same time, the upper end surfaces of two adjacent positioning anchor rods are connected by a connecting spring.

6. A grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 1, characterized in that: The lower half of the grouting pipe body is provided with a plurality of reinforcing ribs evenly distributed around its axis and a positioning ring. The reinforcing ribs are any one of a triangular, isosceles trapezoidal and fan-shaped structure. At the same time, the reinforcing rib plate surface forms an angle of 30°-90° with the axis of the grouting pipe body. Each reinforcing rib is distributed in a spiral structure around the axis of the grouting pipe body. The positioning ring is covered on the outside of the grouting pipe body and is coaxially distributed with the grouting pipe body. The lower end face of the positioning ring is against the upper end face of the topmost reinforcing rib, and the outer diameter of the positioning ring is at least 5 mm larger than the outer diameter of the grouting pipe body, and the outer side surface of the positioning ring is flush with the outer side surface of the reinforcing rib plate.

7. The construction method of a grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel according to claim 1 is characterized in that: The construction method of the grouting device capable of quickly closing shallow surrounding rock cracks in a tunnel comprises the following steps: S1, grouting hole setting, first according to the needs of grouting operation, grouting holes are processed and prepared on the rock layer wall, and the spacing between adjacent grouting holes is 1-10 meters, and the axis of the grouting hole is at an angle of 30°-90° with the rock wall; at the same time, according to the structural size and number of grouting holes, the grouting pipe body, grouting stop device, No. 1 pipeline, No. 2 pipeline, opening isolation device, and middle isolation device structure are respectively set and assembled to obtain a number of grouting plugging devices that meet the use needs; S2, plugging and positioning, first add a resin anchor to the bottom of the grouting hole opened in step S1, then embed the grouting plugging device assembled in step S1 into the grouting hole and coaxially distribute it between the grouting holes, and at the same time, make the lower end face of the grouting pipe body of the grouting plugging device be bonded and fixed between the borehole wall by the resin anchor, so as to complete the preliminary positioning of the grouting plugging device; then adjust the grouting stop device, on the one hand, the grouting stop device seals and plugs the end face of the grouting pipe body, and at the same time, adjusts and sets the gap between the grouting pipe body and the borehole wall; on the other hand, the grouting stop device is used to realize the enhanced positioning of the grouting pipe body between the rock wall of the grouting hole; S3, plugging and positioning, after completing step S2, first inject the foaming material into the front half of the grouting pipe body through pipeline No. 1, and overflow from the grouting holes on the wall of the front half of the grouting pipe body to the gap between the front half of the grouting pipe body and the grouting holes, and after the foaming material expands in the gap between the grouting pipe body and the grouting holes, compress the shallow surrounding rock cracks, so as to achieve the sealing of the shallow surrounding rock cracks of the corresponding tunnel by the front half of the grouting pipe body; then inject the grouting material into the rear half of the grouting pipe body through pipeline No. 2, and overflow from the grouting holes on the wall of the rear half of the grouting pipe body to the gap between the rear half of the grouting pipe body and the grouting holes, and make the grouting material penetrate into the cracks in the rock wall of the grouting hole under the driving pressure, so as to achieve the sealing of the deep surrounding rock cracks of the corresponding tunnel by the rear half of the grouting pipe body; the grouting and plugging operation can be completed.

8. A method for a grouting device capable of quickly closing shallow surrounding rock fissures in a tunnel according to claim 7, characterized in that: In the step S1, when configuring the grouting and plugging device according to the grouting holes, firstly, a construction operation number is assigned to each grouting hole; then, a corresponding grouting and plugging device is allocated to each grouting hole, and a construction operation number matching the grouting hole is assigned to each grouting and plugging device.

Images