A roadway surrounding rock grouting construction method suitable for soft rock mechanical properties

Abstract

The application relates to the field of early-stage reinforcement and protection of roadway surrounding rock, and discloses a grouting construction method suitable for the mechanical properties of soft rock, which comprises the following steps: S1: multiple-point exploration is carried out, a punching position is designed, and punching work with a specified depth is carried out; S2: a groove is dug around the punching position, and a stabilizing mechanism is installed; S3: an injection pipe body is installed in the hole, with one end located in the stabilizing mechanism; S4: a disturbing mechanism is installed on the stabilizing mechanism, and a grouting mechanism is connected to the disturbing mechanism, and grouting is prepared; S5: high-pressure grouting is carried out, and the grout is impacted and disturbed; S6: pressure stabilization is carried out, the disturbing mechanism is disassembled, and the next round of grouting is carried out; S7: grout supplementing is carried out, and subsequent monitoring and maintenance are carried out; the application accelerates the penetration of the grout and the thickness of the grout, improves the grouting efficiency, guarantees the grouting effect, can further encapsulate the grouting hole, facilitates subsequent overall connection, forms an overall stress system, and improves the reinforcement and protection effect of the roadway surrounding rock.

Description

Technical Field

[0001] This invention relates to the field of early reinforcement and protection of roadway surrounding rock, and in particular to a grouting construction method for roadway surrounding rock suitable for the mechanical properties of soft rock. Background Technology

[0002] Geological soft rock refers to loose, soft, and weak rock layers with low strength, high porosity, poor cementation, significant influence from structural cutting and weathering, or containing a large amount of expansive clay minerals. These rocks are mostly mudstone, shale, siltstone, and argillaceous sandstone with a uniaxial compressive strength of less than 25 MPa. They are naturally formed complex geological media. During engineering construction, in order to improve the bearing capacity of the surrounding rock of the tunnel and reduce water permeability, pre-grouting is carried out in the surrounding rock to form a stable structure and ensure the overall safety and stability of the subsequent project and the later use process.

[0003] The existing grouting method generally involves drilling holes at corresponding points after exploration, and then directly grouting the corresponding points with a grouting machine, and then waiting for solidification. During this process, the grout is not easy to enter the small gaps in the rock strata, and the requirements for the grouting machine are relatively high. Overall, the safety factor of the safety protection is relatively small. Summary of the Invention

[0004] To address the technical problem of poor grouting effect, this invention provides a grouting construction method for roadway surrounding rock suitable for the mechanical properties of soft rock.

[0005] This invention is achieved using the following technical solution: a grouting construction method for roadway surrounding rock suitable for the mechanical properties of soft rock, comprising the following steps:

[0006] S1: Conduct exploration at multiple points, design drilling locations, and carry out drilling work at a specified depth;

[0007] S2: Dig a groove around the drilling location and install a stabilizing mechanism;

[0008] S3: Install the injection tube body inside the hole, with one end positioned inside the stabilizing mechanism;

[0009] S4: Install the disturbance mechanism on the stabilizing mechanism and connect it to the grouting mechanism at the same time to prepare for grouting;

[0010] S5: High-pressure grouting, while simultaneously impacting and disturbing the grout;

[0011] S6: Stabilize the pressure, disassemble the disturbance mechanism, and proceed with the next round of grouting;

[0012] S7: Conduct secondary exploration in soft rock areas to ensure stable internal mechanical properties;

[0013] S8: Grouting, and subsequent monitoring and maintenance.

[0014] As a further improvement of the above-mentioned solution, the distance between each hole is not more than 1 m, and the pressure stabilizing time is not less than 0.5 h.

[0015] As a further improvement of the above-mentioned solution, the stabilizing mechanism comprises a packaging box located in the groove, a moving plate slidingly sleeved in the packaging box, a moving sleeve fixedly connected to the middle of the moving plate, a follower pipe and a deep pipe respectively connected to the two sides of the moving sleeve, the deep pipe being connected to the injection pipe body, and a one-way bucket connected in the moving sleeve.

[0016] As a further improvement of the above-mentioned solution, the injection pipe body comprises a connecting head threadedly sleeved with the deep pipe, a guide pipe extending into the hole rotatably connected to one side of the connecting head, a plurality of overflow holes provided on the guide pipe, a plurality of embedding holes provided on one end of the guide pipe and the pipe body of the guide pipe, a corner sleeve rotatably connected to the guide pipe provided in the embedding holes, and a rotating piece rotatably connected to the guide pipe slidingly sleeved in the corner sleeve.

[0017] As a further improvement of the above-mentioned solution, the disturbance mechanism comprises an execution box located on one side of the packaging box, an upper connecting pipe slidingly sleeved on one side of the execution box, a middle pipe connected to one end of the upper connecting pipe and located in the execution box, a lower connecting pipe slidingly sleeved with the execution box and connected to the bottom of the middle pipe, a rotating head threadedly sleeved with the follower pipe and rotatably connected to one end of the lower connecting pipe, a protection ring fixedly sleeved on the outside of the middle pipe, a moving block fixedly connected to one side of the protection ring, a rotating column rotatably connected to the outside of the moving block, a motor fixedly connected in the rotating column, a speed changer transmissionally connected to the output end of the motor, a rotating cylinder rotatably connected to the execution box and transmissionally connected to the output end of the speed changer, a stroke groove provided on the outside of the rotating cylinder and in contact with the rotating column, a guide groove fixedly connected in the execution box, a spring fixedly connected in the guide groove, a sliding block slidingly sleeved with the guide groove and fixedly connected to the other end of the spring, the sliding block being fixedly connected with the other two rotating columns, and a limiting strip fixedly connected with the execution box and slidingly sleeved on the outside of the protection ring.

[0018] As a further improvement of the above-mentioned solution, the grouting mechanism comprises a moving table located in the cave, a storage tank fixedly connected to the moving table, a grouting pump fixedly connected to the moving table and connected to the bottom of the storage tank through a pipeline, a dispersion pipe connected to the output end of the grouting pump, and a plurality of flexible pipes connected to the upper connecting pipe and connected to the dispersion pipe.

[0019] As a further improvement of the above-mentioned solution, one end of the guide pipe is connected to an impact head, and a sliding groove for the sliding of the rotating piece is provided in the corner sleeve.

[0020] As a further improvement of the above-mentioned solution, an operation plate is clamped to the top of the packaging box, a displacement sensor is provided in the packaging box, and a processor is fixedly connected to one side in the packaging box.

[0021] As a further improvement to the above solution, the bottom of the packaging box is provided with multiple mounting holes, and a stabilizing cone connected to the packaging box is provided in the mounting holes. Multiple expansion plates are fixedly connected to the outside of the packaging box, and multiple stabilizing holes are provided on the expansion plates.

[0022] As a further improvement to the above solution, an ultrasonic generator is fixedly connected inside the execution box, and mounting doors are rotatably connected to all four sides of the execution box.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Grouting can be carried out stably through the injection tube. At the same time, the grouting process is intermittently impacted and vibrated to accelerate the penetration of the grout and increase its thickness, thereby improving the grouting efficiency and ensuring the grouting effect. With the help of the stabilizing mechanism, the grouting opening can be further sealed to facilitate subsequent overall connection and form an overall force system, thereby improving the reinforcement and support effect of the surrounding rock of the roadway.

[0025] 2. Through the cooperation of multiple devices, grouting can be carried out quickly and stably. At the same time, the deepening of the inlet pipe and the further restriction of the corner sleeve make the force system more stable, thus making the whole structure more stable and safer to support. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of the present invention;

[0027] Figure 2 This is a partial structural diagram of the present invention;

[0028] Figure 3 This is a partial structural diagram of the disturbance mechanism;

[0029] Figure 4 This is a partial structural diagram of the disturbance mechanism and the stabilization mechanism;

[0030] Figure 5 This is a diagram of the inlet tube structure;

[0031] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle;

[0032] Figure 7 This is a partial structural diagram of the inlet tube.

[0033] Explanation of key symbols:

[0034] 01, mobile station; 03, execution box; 04, packaging box; 05, flexible pipe; 06, lead-in pipe; 07, dispersion pipe; 08, grouting pump; 09, storage tank; 12, stabilizing cone; 13, expansion plate; 14, upper connecting pipe; 15, deep pipe; 16, connecting head; 17, motor; 18, moving plate; 19, guide groove; 20, limiting strip; 21, intermediate pipe; 23, moving block; 24, rotating cylinder; 25, stroke groove; 26, ultrasonic generator; 27, transmission; 28, lower connecting pipe; 29, rotating head; 30, moving sleeve; 32, one-way hopper; 33, follow-up pipe; 34, operation plate; 35, rotating column; 36, protection ring; 38, overflow hole; 39, corner sleeve; 40, embedded hole; 41, rotating piece. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments described below or the technical features thereof can be combined in any manner to form new embodiments without conflict.

[0036] Embodiment 1

[0037] A grouting construction method for soft rock mechanics characteristics of roadway surrounding rock comprises the following steps:

[0038] S1: Multi-point exploration is performed, the drilling position is designed, and drilling work of a specified depth is performed. After measurement, the relatively unstable position is found out, and drilling is performed to maximize the stability after subsequent grouting;

[0039] S2: Grooving is performed around the drilling position, and a stabilizing mechanism is installed. Grooving facilitates the installation of the stabilizing mechanism and ensures the subsequent work;

[0040] S3: The injection pipe body is installed in the hole, with one end located in the stabilizing mechanism. Inserting the injection pipe body can facilitate the grouting of the internal multi-point position, reduce the pressure of the top grouting, and after the completion of the grouting in the later period, the multiple pipe bodies can be connected by the reinforced concrete to form a complete force whole, ensuring the safety of the whole;

[0041] S4: A disturbance mechanism is installed on the stabilizing mechanism, and a grouting mechanism is connected to it. The disturbance mechanism disturbs the injection pipe body to make the gas in the slurry dissipate and promote the infiltration of the slurry in part of the gap;

[0042] S5: High-pressure grouting is performed, and the slurry is impacted and disturbed. High-pressure grouting ensures the force required for grouting flow;

[0043] S6: Pressure stabilization, disassembly of the disturbance mechanism, and subsequent grouting are performed. After pressure stabilization, the slurry in the gap is ensured to enter, and the internal stress is reduced, ensuring the strength of the whole after drying.

[0044] S7: Secondary exploration is conducted on the soft rock to ensure that the internal mechanical properties are stable.

[0045] S8: Supplementary grouting is performed, and post-monitoring and maintenance are conducted.

[0046] The distance between each hole is not more than 1 m, and the pressure stabilizing time is not less than 0.5 h. Through the setting of the multiple holes, the stability of the whole is ensured.

[0047] Embodiment 2:

[0048] In combination with Figures 1-4 ,

[0049] The stabilizing mechanism comprises an encapsulating box 04 located in a groove, a moving plate 18 slidably sleeved in the encapsulating box 04, a moving sleeve 30 fixedly connected to the middle of the moving plate 18, a follow-up pipe 33 and a deep pipe 15 respectively connected to the two sides of the moving sleeve 30, the deep pipe 15 connected to the injection pipe body, a one-way hopper 32 connected in the moving sleeve 30, the encapsulating box 04 installed into the groove of the prepared rock cave and fixed at the same time, the moving plate 18 limiting the freedom of the moving sleeve 30 in a certain direction to ensure the stability of the moving plate 18, and the moving plate 18 in communication with the outside through the follow-up pipe 33 and the deep pipe 15, the deep pipe 15 extending into the hole drilled to facilitate subsequent grouting, and the one-way hopper 32 made of elastic material to realize the one-way flow of the slurry.

[0050] An operation plate 34 is clamped to the top of the encapsulating box 04, a displacement sensor is arranged in the encapsulating box 04, and a processor is fixedly connected to one side of the encapsulating box 04. The operation plate 34 facilitates the operation in the encapsulating box 04, and the displacement sensor and the processor are both existing mechanisms. The displacement sensor monitors the displacement of the moving plate 18 to facilitate subsequent monitoring and collection of other data.

[0051] A plurality of mounting holes are arranged at the bottom of the encapsulating box 04, a stabilizing cone 12 connected with the encapsulating box 04 is arranged in each mounting hole, a plurality of expansion plates 13 are fixedly connected to the outer side of the encapsulating box 04, a plurality of stabilizing holes are arranged on each expansion plate 13, the encapsulating box 04 can be better connected with the rock stratum through the stabilizing cone 12, the expansion plates 13 can be connected with the expansion plates 13 on other encapsulating boxes 04, and the expansion plates 13 are connected with the rock stratum through pins and the like to make the installation of the encapsulating box 04 more stable.

[0052] The implementation principle of the embodiment is that before grouting, the encapsulating box 04 is installed, then connected with the outside through the follow-up pipe 33, and grouted into the hole through the follow-up pipe 33, the moving sleeve 30, the one-way hopper 32 and the deep pipe 15. When the grouting reaches a certain degree, the grouting is stopped, the encapsulating box 04 is closed to the hole, and the grouting work is completed.

[0053] Embodiment 2

[0054] In combination Figures 1-7 , the embodiment is further improved on the basis of Embodiment 2:

[0055] The injection pipe body comprises a connector 16 which is screwed with the deep pipe 15, one side of the connector 16 is rotationally connected with a guide pipe 06 which extends into the hole, a plurality of overflow holes 38 are arranged on the guide pipe 06, a plurality of embedding holes 40 are arranged on one end of the guide pipe 06 and the pipe body of the guide pipe 06, a corner sleeve 39 which is rotationally connected with the guide pipe 06 is arranged in the embedding hole 40, a rotating piece 41 which is rotationally connected with the guide pipe 06 is slidably sleeved in the corner sleeve 39, the connector 16 facilitates the communication between the guide pipe 06 and the deep pipe 15, ensures the subsequent grouting work, the guide pipe 06 is deep into the rock stratum, and at the same time, the grouting is carried out in all directions and at multiple points in cooperation with the overflow holes 38, the pressure stability of grouting at each place is ensured, and at the same time, in the grouting process, the overflow holes 38 and the rotating piece 41 rotate and expand a certain angle due to the pressure effect, the corner sleeve 39 contacts the rock stratum, and then a certain force angle is formed, the stability after the grouting is dried is ensured, and the embedding holes 40 overflow synchronously in cooperation with the needs of other work, and the grouting work is ensured.

[0056] One end of the guide pipe 06 is connected with an impact head, a sliding groove for the sliding of the rotating piece 41 is arranged in the corner sleeve 39, the impact head facilitates the entry of the guide pipe 06 into the hole, and the sliding sleeve facilitates the movement of one end of the rotating piece 41.

[0057] The implementation principle of the embodiment of the application is that after the slurry is injected into the deep pipe 15, the slurry is overflowed through the connector 16, the guide pipe 06 and the overflow holes 38, the overflow holes 38 and the rotating piece 41 rotate and expand a certain angle, the corner sleeve 39 contacts the rock stratum, the embedding holes 40 overflow synchronously, and the grouting at multiple points is realized.

[0058] Embodiment 3

[0059] In combination Figures 1-7 , the embodiment is further improved on the basis of Embodiment 3:

[0060] The disturbance mechanism comprises an execution box 03 located on one side of the packaging box 04, one side of the execution box 03 is slidingly sleeved with an upper connecting pipe 14, one end of the upper connecting pipe 14 is connected with an intermediate pipe 21 located in the execution box 03, the bottom of the intermediate pipe 21 is connected with a lower connecting pipe 28 which is slidingly sleeved with the execution box 03, one end of the lower connecting pipe 28 is rotationally connected with a rotating head 29 which is threadedly sleeved with a follow-up pipe 33, the outer side of the intermediate pipe 21 is fixedly sleeved with a protection ring 36, one side of the protection ring 36 is fixedly connected with a moving block 23, the outer side of the moving block 23 is rotationally connected with a rotating column 35, the rotating column 35 is fixedly connected with a motor 17 inside, the output end of the motor 17 is drivingly connected with a speed changer 27, the output end of the speed changer 27 is drivingly connected with a rotating cylinder 24 which is rotationally connected with the execution box 03, the outer side of the rotating cylinder 24 is provided with a stroke groove 25 which is in contact with the rotating column 35, the execution box 03 is fixedly connected with a guide groove 19 inside, the guide groove 19 is fixedly connected with a spring inside, the other end of the spring is fixedly connected with a sliding block which is slidingly sleeved with the guide groove 19, the sliding block is fixedly connected with the other two rotating columns 35, the outer side of the protection ring 36 is slidingly sleeved with a limiting strip 20 which is fixedly connected with the execution box 03, during installation, the rotating head 29 is threadedly sleeved with the follow-up pipe 33, at the same time, the execution box 03 is fixedly connected with the packaging box 04, forming a stable unit, then the slurry is poured into the follow-up pipe 33 through the upper connecting pipe 14, the intermediate pipe 21, the lower connecting pipe 28 and the rotating head 29, and then the subsequent grouting work is carried out, and at the same time of grouting, the motor 17 is working, then the rotating cylinder 24 is rotated through the speed changer 27, at the same time, under the limitation of the stroke groove 25, the rotating column 35 drives the moving block 23, the protection ring 36, the intermediate pipe 21, the lower connecting pipe 28 and the rotating head 29 to move along the vertical projection of the stroke groove 25, at the same time, cooperating with the elasticity of the spring, the moving track of the rotating column 35 is slowly lifting, then under the driving of the spring, the rotating column 35 is rapidly descending along the stroke groove 25, then slowly ascending along the stroke groove 25, under the driving of the rotating head 29, the follow-up pipe 33, the moving sleeve 30, the deep pipe 15, the connecting head 16 and the inlet pipe 06 are periodically moved and impacted, during the impacting process, the rotating corner sleeve 39 rapidly impacts the slurry inside, so that the instantaneous pressure of the slurry is increased, so that the slurry is better mixed and at the same time enters into the gap, ensuring the grouting effect.

[0061] The execution box 03 is fixedly connected with an ultrasonic generator 26, the execution box 03 is rotationally connected with a mounting door around, the ultrasonic generator 26 can emit ultrasonic waves, the vibration frequency of which is the same as that of the inlet pipe 06, so that the inlet pipe 06 is resonated, further ensuring the slurry injection and mixing, and the mounting door facilitates the installation of the internal device.

[0062] The implementation principle of the embodiment of the present application is that when working, the rotating head 29 is installed with the follow-up pipe 33, and after use, the rotating head 29 is separated from the follow-up pipe 33, thereby adapting to grouting of multiple points. After the rotating head 29 is connected with the follow-up pipe 33, the motor 17 works, then the rotating cylinder 24 is driven to rotate through the transmission 27, and under the limitation of the stroke groove 25, the rotating column 35 drives the moving block 23, the protection ring 36, the intermediate pipe 21, the lower connecting pipe 28, the rotating head 29 to move along the positive stroke groove 25, and at the same time, the elasticity of the spring is matched, the follow-up pipe 33, the moving sleeve 30, the deep pipe 15, the connecting head 16 and the inlet pipe 06 are periodically moved and impacted. In the impact process, the rotating sleeve 39 rapidly impacts the slurry in the inside, so that the instantaneous pressure of the slurry becomes large, the slurry is better mixed and at the same time enters the gap, and the grouting effect is ensured.

[0063] Embodiment 4:

[0064] In combination Figures 1-7 , the embodiment further improves on the basis of embodiment 3, and the improvement is that:

[0065] The grouting mechanism comprises a moving table 01 located in a cave, the moving table 01 is fixedly connected with a storage tank 09, the bottom of the storage tank 09 is connected with a grouting pump 08 fixedly connected with the moving table 01 through a pipeline, the output end of the grouting pump 08 is connected with a dispersion pipe 07, the dispersion pipe 07 is connected with a plurality of flexible pipes 05 connected with the upper connecting pipe 14, through the storage of the storage tank 09, the overall movement can be conveniently carried out, the overall mobility is improved, and at the same time, the expansion and conduction of the dispersion pipe 07 and the flexible pipe 05 can be matched to simultaneously carry out grouting, thereby improving the overall work efficiency.

[0066] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection claimed by the present application.

Claims

1. A roadway surrounding rock grouting construction method suitable for soft rock mechanical properties, characterized in that, It comprises the following steps: S1: carry out multi-point exploration, design punching position, carry out punching work of specified depth, increase punching density for soft place; S2: groove is made around the punching position, and a stabilizing mechanism is installed; S3: install the injection pipe body in the hole, and make one end of the injection pipe body located in the stabilizing mechanism; S4: install the disturbance mechanism on the stabilizing mechanism, and connect the grouting mechanism to the disturbance mechanism; S5: high-pressure grouting, and impact and disturb the slurry; S6: stabilize the pressure, remove the disturbance mechanism, and carry out the next round of grouting; S7: carry out secondary exploration on the soft rock to ensure the stability of the internal mechanical properties; S8: supplement the grouting, and carry out post-maintenance monitoring. The stabilizing mechanism comprises an encapsulation box located in the groove, a moving plate slidably connected in the encapsulation box, a moving sleeve fixedly connected in the middle of the moving plate, a follow-up pipe and a deep pipe connected on both sides of the moving sleeve, the deep pipe connected with the injection pipe body, and a one-way bucket connected in the moving sleeve. The injection pipe body comprises a connecting head threadedly connected with the deep pipe, a guide pipe rotatably connected with one side of the connecting head and extending into the hole, a plurality of overflow holes formed in the guide pipe, a plurality of embedding holes formed in one end of the guide pipe and the pipe body of the guide pipe, a corner sleeve rotatably connected with the guide pipe and arranged in the embedding holes, and a rotating piece slidably connected with the guide pipe and arranged in the corner sleeve. The disturbance mechanism comprises an execution box located on one side of the encapsulation box, an upper connecting pipe slidably connected on one side of the execution box, an intermediate pipe connected with one end of the upper connecting pipe and located in the execution box, a lower connecting pipe slidably connected with the execution box and connected with the bottom of the intermediate pipe, a rotating head threadedly connected with the follow-up pipe and rotatably connected with one end of the lower connecting pipe, a protection ring fixedly connected with the outside of the intermediate pipe, a moving block fixedly connected with one side of the protection ring, a rotating column rotatably connected with the outside of the moving block, an electric motor fixedly connected in the rotating column, a transmission connected between the output end of the electric motor and the rotating cylinder, the rotating cylinder rotatably connected with the execution box and connected with the output end of the transmission, a stroke groove arranged on the outside of the rotating cylinder and in contact with the rotating column, a guide groove fixedly connected in the execution box, a spring fixedly connected in the guide groove and connected with the other end of the spring, a sliding block slidably connected with the guide groove and fixedly connected with the other two rotating columns, and a limiting strip slidably connected with the execution box and fixedly connected with the outside of the protection ring.

2. The roadway surrounding rock grouting construction method suitable for soft rock mechanical properties according to claim 1, characterized in that, The distance between each hole is not more than 1m, the pressure stabilizing time is not less than 0.5h, and the distance between each hole in the soft rock is not more than 0.5m.

3. The roadway surrounding rock grouting construction method for soft rock mechanical properties of claim 1, characterized in that, The grouting mechanism comprises a moving platform located in the roadway, a storage tank fixedly connected with the moving platform, a grouting pump fixedly connected with the moving platform and connected with the bottom of the storage tank through a pipeline, a dispersion pipe connected with the output end of the grouting pump, and a plurality of flexible pipes connected with the upper connecting pipe and connected with the dispersion pipe.

4. The roadway surrounding rock grouting construction method for soft rock mechanical properties according to claim 1, characterized in that, One end of the guide pipe is connected with an impact head, and a sliding groove for the sliding of the rotating piece is arranged in the corner sleeve.

5. The roadway surrounding rock grouting construction method for soft rock mechanical properties according to claim 1, characterized in that, The top of the encapsulation box is clamped with an operation plate, a displacement sensor is arranged in the encapsulation box, and a processor is fixedly connected on one side in the encapsulation box.

6. The roadway surrounding rock grouting construction method for soft rock mechanical properties according to claim 1, characterized in that, The bottom of the packaging box is provided with a plurality of mounting holes, and a stabilizing cone connected with the packaging box is arranged in the mounting hole.

7. The method according to claim 1, wherein the method is applied to the construction of a roadway in soft rock with grouting of the surrounding rock, characterized in that, The ultrasonic generator is fixedly connected in the execution box, and the mounting door is rotationally connected around the execution box.

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