Tunnel safety grouting construction equipment and method based on drilling and blasting method

Abstract

The invention relates to the technical field of tunnel construction, in particular to tunnel safety grouting construction equipment and method based on a drilling and blasting method.The tunnel safety grouting construction equipment comprises an installation sliding base installed at the front end of a tunnel shield tunneling machine, and a lifting fine adjustment unit is fixedly installed at the top of the installation sliding base; multi-direction grouting units are fixedly installed on the tops of the lifting fine adjustment units, end slurry treatment units are installed at the front ends of the multi-direction grouting units, and the multi-direction grouting units are used for grouting in grouting holes in the side walls of the periphery of the tunnel correspondingly. And each grouting pipe joint is used for being connected with each grout discharging end of the multidirectional grouting unit. Before grouting, the equipment needs to be connected with the front end of an existing tunnel shield tunneling machine, so that circumferential reciprocating swing is completed at the section position of the corresponding position of a tunnel to achieve grouting operation, and the aim of reasonably controlling the grouting effect is achieved by controlling the grouting pressure and the grouting flow of an external grouting pump in the grouting process.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel safety grouting construction device and method based on a drilling and blasting method. Background Art

[0002] When using the drilling and blasting method to construct tunnels in rock, several holes of appropriate depth are usually drilled on the rock blasting surface and filled with explosives. The holes are then detonated after being filled with explosives. The shock wave generated by the explosion and the work done by the explosives are used to break the rock and create the required holes.

[0003] Although the drilling and blasting method has advantages such as high efficiency in the tunnel excavation process, for rock strata under special geological conditions, there will still be many rock cracks and voids after construction is completed. Therefore, grouting operations are required to fill the cracks and voids, enhance the integrity and stability of the surrounding rock, and thus reduce the risk of collapse.

[0004] At present, when grouting construction is carried out in tunnel rock holes in the prior art, an integrated construction method of blasting, sealing and grouting is generally adopted, as disclosed in the patent document with patent application number CN201910003187.3 and IPC classification number E21D9 / 00. The method mainly comprises drilling blasting grouting holes and placing PVC pipes, and then loading several explosive packs and blasting. After blasting, grouting is performed on the upper section of the PVC pipe, and the slurry penetrates into the stratum through the through holes on the pipe wall of the upper section under pressure to reinforce the stratum.

[0005] It can be seen that this grouting method places a PVC pipe in the lower section of the grouting borehole in advance. This method of vertically placing the pipe can achieve grouting reinforcement at the bottom of the tunnel. However, its support and reinforcement capacity is weak when supporting grouting in the circumferential direction of the tunnel. When the upper rock layer is loose, there are safety hazards, which can easily affect the quality of the subsequent grouting construction.

[0006] Based on this, the present invention optimizes and designs the grouting quality and safety problems existing in the tunnel grouting construction in the prior art, and hereby proposes a tunnel safety grouting construction equipment and method based on the drilling and blasting method to better solve the problems existing in the prior art. Summary of the invention

[0007] The present invention solves one of the above technical problems, and the technical solution adopted is: a tunnel safety grouting construction equipment based on the drilling and blasting method, the tunnel safety grouting construction equipment includes a mounting slide installed at the front end of a tunnel shield machine, the mounting slide follows the tunnel shield machine to achieve displacement along the extension direction of the tunnel, a lifting and fine-tuning unit is fixedly installed on the top of the mounting slide, a multi-directional grouting unit is fixedly installed on the top of the lifting and fine-tuning unit, a terminal slurry processing unit is installed at the front end of the multi-directional grouting unit, a grouting pipe fitting for connecting to an external grouting pump is installed at the rear end of the multi-directional grouting unit, each of the multi-directional grouting units is respectively used to grout into each grouting hole on the peripheral side wall of the tunnel, each of the grouting holes is arranged at intervals along the circumferential direction of the inner wall of the tunnel, PVC grouting pipes are respectively pre-installed in the blasting holes in the rock formation of the peripheral side wall of the tunnel, and each of the grouting holes is respectively installed with a grouting pipe joint for communicating with the inside of the PVC grouting pipe, and each of the grouting pipe joints is respectively used to be connected to each slurry discharge end of the multi-directional grouting unit.

[0008] In any of the above schemes, it is preferred that the multi-directional grouting unit includes an annular bin fixedly installed on the top of the lifting and fine-tuning unit, the annular bin is relatively fixed in the vertical direction, an annular space is arranged inside the annular bin, both ends of the annular space are penetrated, a horizontal mixing drum coaxially arranged therewith is arranged at the inner center of the annular space, four radial sprayers are evenly spaced along the circumference of the outer wall of the horizontal mixing drum, the interior of each radial sprayer is respectively connected with the internal mixing chamber of the horizontal mixing drum, grouting alignment locking pieces are installed on the lower part and outer wall of the horizontal mixing drum, four through openings are respectively spaced along the circumference of the outer wall of the annular bin, the outer ends of each of the grouting alignment locking pieces are movable through the corresponding through openings and extend into the space of the tunnel, the front end of the horizontal mixing drum is connected to the end slurry processing unit, and the rear end of the horizontal mixing drum is connected to the grouting pipe fittings.

[0009] In any of the above schemes, preferably, the radial sprayer includes a radial root tube fixedly mounted on the outer side of the horizontal mixing drum, the outer end of the radial root tube movably passes through the corresponding through opening, the interior of the radial root tube is communicated with the internal mixing chamber, a telescopic slurry guiding component is movably and sealingly installed on the outer end side wall of the radial root tube, the outer end of the telescopic slurry guiding component is used to cooperate and plug with the mouth of the grouting pipe joint at its corresponding position, the grouting slurry enters the telescopic slurry guiding component through the radial root tube, and is sprayed into the PVC grouting pipe through the mouth of the grouting pipe joint to complete the grouting operation, and an electromagnetic control valve is installed on each of the radial root tubes.

[0010] In any of the above schemes, it is preferred that arc-shaped constraint guide slides are provided on the outer walls of the radial root tubes on the inner and outer sides of each of the through openings, and the two arc-shaped constraint guide slides located on the inner and outer sides are movably abutted against the inner and outer walls of the annular warehouse.

[0011] In any of the above solutions, preferably, the arc-shaped constraint guide slide plate is made of brass.

[0012] In any of the above schemes, preferably, the telescopic slurry guiding component includes a radial sleeve movably and sealingly sleeved on the outer side wall of the radial root tube, a flange is provided at the inner end of the radial sleeve, and two telescopic cylinders are respectively provided between the flange and the corresponding arc-shaped constraint guide slide, the inner end of each telescopic cylinder is fixed on the arc-shaped constraint guide slide, and the outer end of each telescopic cylinder is fixed on the flange and drives the radial sleeve to telescope and shift axially along the radial root tube through telescoping.

[0013] In any of the above schemes, preferably, an arc-shaped protective steel plate is provided in the space of the tunnel at the upper part of the annular bin, and both ends of the arc-shaped protective steel plate are sleeved on the outer side wall of the radial sleeve below its corresponding position.

[0014] In any of the above schemes, preferably, a supporting structure is fixedly built on the inner wall of the tunnel along its circumference.

[0015] In any of the above schemes, it is preferred that the grouting alignment locking piece is used to drive the horizontal mixing drum and the four radial grouting sprayers thereon to swing along a circle to adjust the relative position of each current radial grouting sprayer and the corresponding grouting pipe joint.

[0016] In any of the above schemes, it is preferred that the grouting pipe comprises a tapered connecting portion installed at the rear end of the horizontal mixing drum, and a grouting telescopic pipe connected to an external grouting pump is integrally formed at the rear end of the tapered connecting portion.

[0017] In any of the above schemes, it is preferred that the grouting alignment locking member includes a large gear fixedly mounted on the outer wall of the horizontal mixing drum, a driving pinion is meshed below the large gear, a positioning frame is fixedly mounted on the bottom of the annular space on the rear side of the driving pinion, a driving motor is fixedly mounted on the positioning frame, and the output shaft of the driving motor is fixedly connected to the driving pinion.

[0018] In any of the above schemes, it is preferred that the end slurry processing unit includes a sealing sleeve installed at the front end of the horizontal mixing barrel, a motor bin is fixedly installed at the front end of the sealing sleeve, a stirring motor is fixedly installed inside the motor bin, the rear end of the motor shaft of the stirring motor is movable and sealed to extend into the interior of the internal mixing chamber and is fixedly connected to a horizontally arranged hollow stirring shaft, and a plurality of stirring teeth are fixedly installed on the outer side wall of the hollow stirring shaft.

[0019] In any of the above solutions, preferably, a rangefinder is fixedly mounted on the front end of the blocking sleeve.

[0020] In any of the above schemes, it is preferred that a slurry specific gravity sensor is fixedly installed on the outer wall of the rear end of the hollow stirring shaft, each of the slurry specific gravity sensors is powered by a power supply installed inside the hollow stirring shaft, each of the slurry specific gravity sensors is used to monitor the specific gravity of the slurry in the current internal mixing chamber and complete data transmission, and the rear end of the hollow stirring shaft passes through the internal mixing chamber and extends into the conical connecting portion.

[0021] In any of the above schemes, it is preferred that the lifting and fine-tuning unit includes fine-tuning electric cylinders distributed in an array on the top of the mounting slide, the bottom of each fine-tuning electric cylinder is fixed on the top of the mounting slide, the top of each fine-tuning electric cylinder is fixedly installed on the bottom of the annular warehouse, and each fine-tuning electric cylinder is in a synchronous lifting state when in working state.

[0022] In any of the above schemes, it is preferred that each of the radial sprayers can inject slurry into the interior of each of the PVC grouting pipes one by one through rotation and adjustment.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention utilizes the device to successively complete rapid grouting operations inside each PVC grouting pipe pre-installed inside the tunnel. During the grouting process, grouting into the PVC grouting pipe can be achieved through successive swinging adjustments. The slurry entering the PVC grouting pipe will continuously seep into the cracks in the tunnel rock wall, ultimately achieving the purpose of grouting to reinforce the tunnel rock wall and rock strata, so that the entire tunnel wall forms a stable grouting structure.

[0025] 2. The tunnel safety grouting construction equipment based on the drilling and blasting method mentioned in the present invention needs to be connected to the front end of the existing tunnel shield machine before grouting, so as to complete the circumferential reciprocating swing at the cross-section part at the corresponding position of the tunnel to realize the grouting operation. During the grouting process, the grouting pressure and grouting flow of the external grouting pump are controlled to achieve the purpose of reasonably controlling the grouting effect.

[0026] 3. Before grouting, it is necessary to control the alignment of the grouting pipe joint in the grouting hole and the outlet end of the corresponding radial grouting device on the multi-directional grouting unit. During the alignment, the circumferential swing of each radial grouting device can be achieved by driving the grouting alignment locking part, and radial control can be achieved by telescopic slurry guide components, ultimately achieving the purpose of precise alignment and rapid grouting.

[0027] 4. In the present invention, when grouting is performed, after the slurry enters the interior of the horizontal mixing drum, the end slurry processing unit can realize rapid terminal stirring treatment of the internal slurry, so that it can quickly achieve the purpose of uniformity and homogeneity, thereby improving the slurry grouting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a structural schematic diagram of the tunnel safety grouting construction equipment of the present invention when it is installed in a tunnel.

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the tunnel safety grouting construction equipment of the present invention.

[0031] Figure 3 It is a schematic diagram of the main structure of the tunnel safety grouting construction equipment of the present invention.

[0032] Figure 4 It is a partial front view structural schematic diagram of the tunnel safety grouting construction equipment of the present invention.

[0033] Figure 5 It is a partial three-dimensional structural schematic diagram of the tunnel safety grouting construction equipment of the present invention from a first perspective.

[0034] Figure 6 It is a partial three-dimensional structural schematic diagram of the tunnel safety grouting construction equipment of the present invention from a second viewing angle.

[0035] Figure 7 It is a schematic diagram of the internal three-dimensional structure of the multi-directional grouting unit of the present invention.

[0036] Figure 8 It is a schematic diagram of the main structure of the multi-directional grouting unit of the present invention.

[0037] Fig. 9 It is a schematic diagram of the internal structure of the end slurry processing unit of the present invention.

[0038] In the figure, 1. mounting slide; 2. grouting hole; 3. inner wall of tunnel; 4. rock layer; 5. PVC grouting pipe; 6. grouting pipe joint; 7. annular bin; 8. annular space; 9. radial grouting device; 901. radial root pipe; 902. electromagnetic control valve; 903. arc-shaped constraint guide slide plate; 904. radial sleeve; 905. flange; 906. telescopic cylinder; 10. horizontal mixing barrel; 11. internal mixing chamber; 12. through opening; 13. conical connection; 14. grouting telescopic pipe; 15. large gear; 16. driving pinion; 17. positioning frame; 18. driving motor; 19. plugging sleeve; 20. motor bin; 21. stirring motor; 22. hollow stirring shaft; 23. stirring teeth; 24. slurry specific gravity sensor; 25. fine-tuning electric cylinder; 26. supporting structure; 27. distance meter; 28. arc-shaped protective steel plate. DETAILED DESCRIPTION

[0039] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention. Figure 1-Figure 9 as shown in .

[0040] Embodiment 1: A tunnel safety grouting construction equipment based on the drilling and blasting method, the tunnel safety grouting construction equipment comprises a mounting slide 1 mounted at the front end of a tunnel shield machine, the mounting slide 1 follows the tunnel shield machine to achieve displacement along the tunnel extension direction, a lifting and fine-tuning unit is fixedly mounted on the top of the mounting slide 1, a multi-directional grouting unit is fixedly mounted on the top of the lifting and fine-tuning unit, a terminal slurry processing unit is mounted at the front end of the multi-directional grouting unit, and a grouting unit for connecting with an external grouting unit is mounted at the rear end of the multi-directional grouting unit. The grouting pipe fittings are connected to the slurry pump, and each of the multi-directional grouting units is used to inject grout into each grouting hole 2 on the peripheral side wall of the tunnel. Each of the grouting holes 2 is arranged at intervals along the circumferential direction of the inner wall 3 of the tunnel. PVC grouting pipes 5 are pre-installed in the blasting holes in the rock layer 4 on the peripheral side wall of the tunnel. A grouting pipe joint 6 for communicating with the inside of the PVC grouting pipe 5 is installed in each of the grouting holes 2, and each of the grouting pipe joints 6 is used to be connected to each slurry discharge end of the multi-directional grouting unit.

[0041] It should be noted that the tunnel safety grouting construction equipment based on the drilling and blasting method in the present invention needs to be fixedly installed at the front end of the tunnel shield machine according to the use requirements before use. At this time, the tunnel shield machine is in an idle state but does not perform shield operations, and only moves forward or backward when necessary.

[0042] After the equipment is installed, the lifting and lowering fine-tuning unit is adjusted according to the current speed adjustment size, so that the center of the multi-directional grouting unit is close to or coincides with the center of the tunnel; then the multi-directional grouting unit is controlled to first complete the circumferential swing under the action of the grouting alignment locking piece, and then complete the radial expansion and contraction under the action of the telescopic slurry guiding component, so that the outlet ends of the four radial grouting devices 9 on the current multi-directional grouting unit are finally abutted and aligned with the pipe orifices of the current grouting pipe joint 6 respectively, and at the same time, under the control of radial expansion and contraction, its movable seal can be extended into the pipe orifice of the grouting pipe joint 6 for a distance, so as to ensure that the leakage of slurry at the pipe orifice is reduced during grouting.

[0043] After the adjustment is completed, turn on the external grouting pump, and synchronously cooperate with the four radial sprayers 9 to inject grout into the four PVC grouting pipes 5. The slurry entering the PVC grouting pipes 5 will flow into the cracks in the tunnel rock wall through the gaps and ports of the PVC pipe wall, ultimately achieving the purpose of filling the internal cracks and reinforcing the tunnel rock wall.

[0044] In any of the above schemes, it is preferred that the multi-directional grouting unit includes an annular bin 7 fixedly installed on the top of the lifting and fine-tuning unit, the annular bin 7 remains relatively fixed in the vertical direction, an annular space 8 is arranged inside the annular bin 7, both ends of the annular space 8 are penetrated, a horizontal mixing drum 10 coaxially arranged therewith is arranged in the inner center of the annular space 8, four radial grouting devices 9 are evenly spaced along the circumference of the outer wall of the horizontal mixing drum 10, the interior of each of the radial grouting devices 9 is respectively connected with the internal mixing chamber 11 of the horizontal mixing drum 10, a grouting alignment locking piece is installed on the lower part and the outer wall of the horizontal mixing drum 10, four through openings 12 are respectively spaced along the circumference of the outer wall of the annular bin 7, the outer end of each of the grouting alignment locking pieces moves through the corresponding through openings 12 and extends into the space of the tunnel, the front end of the horizontal mixing drum 10 is connected to the end slurry processing unit, and the rear end of the horizontal mixing drum 10 is connected to the grouting pipe fitting.

[0045] The multi-directional grouting unit mainly relies on the annular bin 7 as the intermediate support, and its bottom is locked by the grouting alignment locking piece. At the same time, when the grouting alignment locking piece is driven, it can drive the four radial sprayers 9 to achieve circumferential displacement along the circumferential section of the tunnel. After displacement into place, the slurry that enters the horizontal mixing drum 10 through the grouting pipe fittings will be finely stirred under the mixing and stirring action of the end slurry processing unit. The slurry after stirring can better and faster enter the interior of the PVC steel pipe, and then fill the cracks and gaps in the rock wall of the tunnel, so as to achieve the purpose of filling and reinforcing the tunnel and ensure the effect and safety of tunnel grouting.

[0046] In any of the above schemes, it is preferred that the grouting alignment locking member is used to drive the horizontal mixing drum 10 and the four radial grouting sprayers 9 thereon to swing along a circle to adjust the relative position of each current radial grouting sprayer 9 and the corresponding grouting pipe joint 6.

[0047] In any of the above schemes, it is preferred that the grouting pipe comprises a tapered connecting portion 13 installed at the rear end of the horizontal mixing drum 10, and a grouting telescopic pipe 14 connected to an external grouting pump is integrally formed at the rear end of the tapered connecting portion 13.

[0048] After the slurry is transported through the external grouting pump and pipeline, the slurry can directly enter the grouting telescopic pipe 14, and enter the conical connecting part 13 under the transportation action of the grouting telescopic pipe 14 to complete appropriate decompression. The decompressed slurry will directly enter the end slurry processing unit and complete the rapid stirring process of the slurry, and finally realize directional grouting by controlling the opening of the corresponding electromagnetic control valve 902.

[0049] In any of the above schemes, it is preferred that the grouting alignment locking member includes a large gear 15 fixedly mounted on the outer wall of the horizontal mixing drum 10, a driving pinion 16 is meshed below the large gear 15, a positioning frame 17 is fixedly mounted at the bottom of the annular space 8 on the rear side of the driving pinion 16, a driving motor 18 is fixedly mounted on the positioning frame 17, and the output shaft of the driving motor 18 is fixedly connected to the driving pinion 16.

[0050] The grouting alignment locking device designed in the present invention mainly relies on the drive motor 18 to drive the driving pinion 16 to rotate during operation. During the rotation of the driving pinion 16, it can drive the large gear 15 meshing with it and the horizontal mixing drum 10 fixed on the large gear 15 to follow the rotation. In addition, the rotation of the horizontal mixing drum 10 will drive the four radial sprayers 9 fixed thereon to realize reciprocating swing within a certain angle range. The swing angle is mainly controlled by the length of the through opening 12 at the corresponding position. At the same time, the swing angle control of the driving motor 18 is coordinated to achieve the purpose of intelligent control of the positioning angle.

[0051] In any of the above schemes, it is preferred that the end slurry processing unit includes a sealing sleeve 19 installed at the front end of the horizontal mixing drum 10, a motor bin 20 is fixedly installed at the front end of the sealing sleeve 19, and a stirring motor 21 is fixedly installed inside the motor bin 20. The rear end of the motor shaft of the stirring motor 21 is movable and sealed to extend into the interior of the internal mixing chamber 11 and is fixedly connected to a horizontally arranged hollow stirring shaft 22, and a plurality of stirring teeth 23 are fixedly installed on the outer wall of the hollow stirring shaft 22.

[0052] It should be noted that the end slurry processing unit in the present invention mainly relies on the driving of the stirring motor 21 to drive the hollow stirring shaft 22 to rotate during operation. During the rotation of the hollow stirring shaft 22, the stirring teeth 23 can be driven to operate, thereby finally achieving rapid stirring of the slurry entering the internal mixing chamber 11.

[0053] In any of the above schemes, it is preferred that a slurry specific gravity sensor 24 is fixedly installed on the outer wall of the rear end of the hollow stirring shaft 22, each of the slurry specific gravity sensors 24 is powered by a power supply installed inside the hollow stirring shaft 22, and each of the slurry specific gravity sensors 24 is used to monitor the specific gravity of the slurry in the current internal mixing chamber 11 and complete data transmission. The rear end of the hollow stirring shaft 22 passes through the internal mixing chamber 11 and extends into the conical connecting portion 13.

[0054] In order to ensure effective monitoring of the quality of the slurry after stirring during the stirring process, each slurry specific gravity sensor 24 installed at the rear end of the hollow stirring shaft 22 can quickly monitor the current specific gravity and uniformity of the slurry.

[0055] In any of the above schemes, it is preferred that the lifting and fine-tuning unit includes fine-tuning electric cylinders 25 distributed in an array on the top of the mounting slide 1, the bottom of each fine-tuning electric cylinder 25 is fixed on the top of the mounting slide 1, the top of each fine-tuning electric cylinder 25 is fixedly installed on the bottom of the annular warehouse 7, and each fine-tuning electric cylinder 25 is in a synchronous lifting state when in working state.

[0056] When the lifting and fine-tuning unit is in operation, the extension and retraction of the fine-tuning electric cylinder 25 can drive the lifting and lowering of the annular bin 7 and its upper components, thereby achieving the purpose of aligning the annular bin 7 with the center of the tunnel after being appropriately adjusted according to the current cross-sectional dimensions of the tunnel.

[0057] In any of the above schemes, it is preferred that each of the radial sprayers 9 can inject slurry into the interior of each of the PVC grouting pipes 5 one by one by rotating and adjusting the position.

[0058] As a demonstration: in the present invention, 12 PVC grouting pipes 5 are arranged around the tunnel, and each radial grouting device 9 needs to swing three times to complete the filling process of the slurry inside the entire pipe.

[0059] Embodiment 2: In any of the above schemes, it is preferred that the radial sprayer 9 includes a radial root pipe 901 fixedly mounted on the outer side of the horizontal mixing drum 10, the outer end of the radial root pipe 901 movably passes through the corresponding through opening 12, the interior of the radial root pipe 901 is communicated with the internal mixing chamber 11, and a telescopic slurry guiding component is movably and sealingly installed on the outer end side wall of the radial root pipe 901, the outer end of the telescopic slurry guiding component is used to cooperate and plug with the mouth of the grouting pipe joint 6 at its corresponding position, the grouting slurry enters the telescopic slurry guiding component through the radial root pipe 901, and is sprayed into the PVC grouting pipe 5 through the mouth of the grouting pipe joint 6 to complete the grouting operation, and an electromagnetic control valve 902 is installed on each of the radial root pipes 901.

[0060] The root of the radial sprayer 9 in the present invention is connected to the interior of the horizontal mixing drum 10 by means of a radial root pipe 901. When grouting is required, the electromagnetic control valve 902 on the corresponding path can be opened. A maximum of four electromagnetic control valves 902 can be opened at one time to achieve four-path grouting. At the same time, three-path grouting, two-path grouting or single-path grouting can also be achieved according to needs.

[0061] Taking into account the effect of the tight fit between the end of the radial sprayer 9 and the corresponding grouting pipe joint 6 during grouting, a corresponding telescopic slurry guiding component is provided here to achieve telescopic alignment as required, and ultimately achieve the purpose of rapid fit and tight fit, ensuring that the slurry is prevented from flowing out of the connection part during the grouting process.

[0062] In any of the above schemes, it is preferred that an arc-shaped constraint guide slide 903 is provided on the outer wall of the radial root tube 901 on the inner and outer sides of each of the through openings 12, and the two arc-shaped constraint guide slides 903 located on the inner and outer sides are both movably abutted against the inner and outer walls of the annular warehouse 7.

[0063] In any of the above solutions, preferably, the arc-shaped constraint guide slide plate 903 is made of brass.

[0064] The brass arc-shaped constraint guide slide plate 903 can not only play a supporting role, but also play a guiding and certain self-lubricating role when the entire radial root pipe 901 is positioned.

[0065] In any of the above schemes, it is preferred that the telescopic slurry guiding component includes a radial sleeve 904 which is movably and sealingly sleeved on the outer wall of the radial root tube 901, a flange 905 is provided at the inner end of the radial sleeve 904, and two telescopic cylinders 906 are respectively provided between the flange 905 and the corresponding arc-shaped constraint guide slide 903, the inner end of each telescopic cylinder 906 is fixed on the arc-shaped constraint guide slide 903, and the outer end of each telescopic cylinder 906 is fixed on the flange 905 and drives the radial sleeve 904 to telescopically shift along the axial direction of the radial root tube 901 through telescoping.

[0066] When the telescopic grouting guide component works, it mainly relies on the telescopic cylinder 906 to drive the flange 905 and radial sleeve 904 connected thereto to achieve telescopic expansion and contraction along the axial direction, so that the end of the radial sleeve 904 is close to or tightly inserted into the corresponding grouting hole 2, thereby better improving the sealing effect of the grouting joint.

[0067] In any of the above schemes, it is preferred that an arc-shaped protective steel plate 28 is provided in the space of the tunnel at the upper part of the annular bin 7, and both ends of the arc-shaped protective steel plate 28 are sleeved on the outer side wall of the radial sleeve 904 below its corresponding position.

[0068] Considering the safety of the entire structure during operation, an arc-shaped protective steel plate 28 is installed above it to effectively shield and protect the components below it.

[0069] In any of the above solutions, it is preferred that a supporting structure 26 is fixedly built on the inner wall of the tunnel along its circumference.

[0070] The supporting structure 26 can further ensure the safety of the tunnel inner wall 3 after construction.

[0071] In any of the above solutions, preferably, a distance meter 27 is fixedly installed at the front end of the plugging sleeve 19. When the entire device moves following the tunnel shield machine, the distance meter 27 can be used to accurately measure the travel distance.

[0072] The present invention also provides a tunnel safety grouting construction method based on the drilling and blasting method, wherein the tunnel safety grouting construction method based on the drilling and blasting method is completed by the tunnel safety grouting construction equipment based on the drilling and blasting method, and the specific steps of the tunnel safety grouting construction method based on the drilling and blasting method are as follows:

[0073] S1: Before use, it needs to be fixedly installed at the front end of the tunnel shield machine according to the use requirements. At this time, the tunnel shield machine is in an idle state but does not perform shield operations. It only moves forward or backward when necessary.

[0074] S2: After the equipment is installed, the lifting and fine-tuning unit is adjusted according to the current speed adjustment size so that the center of the multi-directional grouting unit is close to or coincides with the center of the tunnel.

[0075] S3: Control the multi-directional grouting unit to first complete the circumferential swing under the action of the grouting alignment locking piece, and then complete the radial expansion and contraction under the action of the telescopic grouting guide component.

[0076] S4: The outlet ends of the four radial sprayers 9 on the current multi-directional grouting unit are respectively abutted against and aligned with the pipe openings of the current grouting pipe joint 6. At the same time, under the control of radial expansion and contraction, the movable seal can be extended into the pipe opening of the grouting pipe joint 6 for a certain distance, thereby ensuring that the leakage of slurry at the pipe opening is reduced during grouting.

[0077] S5: After the adjustment is completed, turn on the external grouting pump, and synchronously cooperate with the four radial sprayers 9 to inject grout into the four PVC grouting pipes 5. The slurry entering the PVC grouting pipes 5 will flow into the cracks in the tunnel rock wall through the gaps and ports of the PVC pipe wall, ultimately achieving the purpose of filling the internal cracks and gaps and reinforcing the tunnel rock wall.

[0078] In summary, it can be seen that the present invention utilizes this equipment to successively complete rapid grouting operations for the interior of each PVC grouting pipe 5 pre-installed inside the tunnel. During the grouting process, grouting into the interior of the PVC grouting pipe 5 can be achieved through successive swinging adjustments. The slurry entering the interior of the PVC grouting pipe 5 will continuously seep into the cracks in the tunnel rock wall, ultimately achieving the purpose of grouting to reinforce the tunnel rock wall stratum 4, so that the entire tunnel wall forms a stable grouting structure; the tunnel safety grouting construction equipment based on the drilling and blasting method needs to be connected to the front end of the existing tunnel shield machine before grouting, so as to complete the circumferential reciprocating swing at the cross-section part at the corresponding position of the tunnel to realize the grouting operation, and in the process of grouting, The grouting pressure and grouting flow rate of the external grouting pump are controlled to achieve the purpose of reasonably controlling the grouting effect; before grouting, it is necessary to control the grouting pipe joint 6 in the grouting hole 2 and the outlet end of the corresponding radial grouting device 9 on the multi-directional grouting unit to complete the alignment, and the circumferential swing of each radial grouting device 9 can be achieved by driving the grouting alignment locking member during alignment, and radial control is achieved by telescopic slurry guide components, ultimately achieving the purpose of precise alignment and rapid grouting; in the present invention, after the slurry enters the interior of the horizontal mixing drum 10 during grouting, the end slurry processing unit can be used to achieve rapid terminal stirring of the internal slurry, so that it can quickly achieve the purpose of uniformity and homogeneity, thereby improving the slurry grouting effect.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention fall within the protection scope of the present invention.

[0080] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A tunnel safety grouting construction equipment based on the drilling and blasting method, the tunnel safety grouting construction equipment comprises a mounting slide mounted on the front end of a tunnel shield machine, characterized in that: A lifting and fine-tuning unit is fixedly installed on the top of the mounting slide, a multi-directional grouting unit is fixedly installed on the top of the lifting and fine-tuning unit, a terminal slurry processing unit is installed at the front end of the multi-directional grouting unit, and a grouting pipe fitting for connecting with an external grouting pump is installed at the rear end of the multi-directional grouting unit. Each of the multi-directional grouting units is used to grout into each grouting hole on the peripheral side wall of the tunnel, and each of the grouting holes is arranged at intervals along the circumferential direction of the inner wall of the tunnel. PVC grouting pipes are pre-installed in the blasting holes in the rock formation on the peripheral side wall of the tunnel, and each of the grouting holes is installed with a grouting pipe joint for communicating with the inside of the PVC grouting pipe, and each of the grouting pipe joints is used to be connected to each slurry discharge end of the multi-directional grouting unit.

2. The tunnel safety grouting construction equipment based on the drilling and blasting method according to claim 1 is characterized by: The multi-directional grouting unit includes an annular bin fixedly installed on the top of the lifting and fine-tuning unit, the annular bin is relatively fixed in the vertical direction, an annular space is arranged inside the annular bin, both ends of the annular space are penetrated, a horizontal mixing drum coaxially arranged therewith is arranged at the inner center of the annular space, four radial sprayers are evenly spaced along the circumference of the outer wall of the horizontal mixing drum, the interior of each radial sprayer is respectively communicated with the internal mixing chamber of the horizontal mixing drum, a grouting alignment locking piece is installed on the lower part and the outer wall of the horizontal mixing drum, four through openings are respectively spaced along the circumference of the outer wall of the annular bin, the outer end of each grouting alignment locking piece is movably passed through the corresponding through opening and extends into the space of the tunnel, the front end of the horizontal mixing drum is connected to the end slurry processing unit, and the rear end of the horizontal mixing drum is connected to the grouting pipe fitting.

3. The tunnel safety grouting construction equipment based on the drilling and blasting method according to claim 2 is characterized by: The grouting alignment locking piece is used to drive the horizontal mixing drum and the four radial grouting sprayers thereon to swing along a circle to adjust the relative position of each of the current radial grouting sprayers and the corresponding grouting pipe joints.

4. The tunnel safety grouting construction equipment based on the drilling and blasting method according to claim 3 is characterized by: The grouting pipe fitting comprises a tapered connecting portion installed at the rear end of the horizontal mixing drum, and a grouting telescopic pipe connected to an external grouting pump is integrally formed at the rear end of the tapered connecting portion.

5. The tunnel safety grouting construction equipment based on the drilling and blasting method according to claim 4 is characterized by: The grouting alignment locking piece includes a large gear fixedly mounted on the outer side wall of the horizontal mixing drum, a driving pinion is meshed below the large gear, a positioning frame is fixedly mounted on the bottom of the annular space on the rear side of the driving pinion, a driving motor is fixedly mounted on the positioning frame, and the output shaft of the driving motor is fixedly connected to the driving pinion.

6. The tunnel safety grouting construction equipment based on the drilling and blasting method according to claim 5 is characterized by: The end slurry processing unit includes a sealing sleeve installed at the front end of the horizontal mixing barrel, a motor bin is fixedly installed at the front end of the sealing sleeve, a stirring motor is fixedly installed inside the motor bin, the rear end of the motor shaft of the stirring motor is movable and sealed to extend into the interior of the internal mixing chamber and is fixedly connected to a horizontally arranged hollow stirring shaft, and a plurality of stirring teeth are fixedly installed on the outer side wall of the hollow stirring shaft.

7. The tunnel safety grouting construction equipment and method based on the drilling and blasting method according to claim 6 is characterized by: A slurry specific gravity sensor is fixedly installed on the outer wall of the rear end of the hollow stirring shaft. Each of the slurry specific gravity sensors is powered by a power supply installed inside the hollow stirring shaft. Each of the slurry specific gravity sensors is used to monitor the specific gravity of the slurry in the current internal mixing chamber and complete data transmission. The rear end of the hollow stirring shaft passes through the internal mixing chamber and extends into the conical connecting portion.

8. The tunnel safety grouting construction equipment and method based on the drilling and blasting method according to claim 7 is characterized by: The lifting and fine-tuning unit includes fine-tuning electric cylinders distributed in an array on the top of the mounting slide, the bottom of each fine-tuning electric cylinder is fixed on the top of the mounting slide, the top of each fine-tuning electric cylinder is fixedly installed on the bottom of the annular warehouse, and each fine-tuning electric cylinder is in a synchronous lifting state when in working state.

9. The tunnel safety grouting construction equipment and method based on the drilling and blasting method according to claim 8 is characterized by: Each of the radial grouting devices can inject slurry into the interior of each of the PVC grouting pipes one by one by rotating and adjusting the position.

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