Automatic double-liquid grouting device behind wall of subway tunnel

Abstract

The invention provides an automatic back-wall double-liquid grouting device for a subway tunnel. The automatic back-wall double-liquid grouting device comprises a non-return grouting head, a blowout prevention device, an electric walking driving device and an electric rotating driving device. The electric walking driving device is fixedly installed on the side of a grouting point of a tunnel and arranged in the grouting depth direction, and the electric rotating driving device is installed on the electric walking driving device, so that the electric rotating driving device is movably arranged in the tunnel through the electric walking driving device in the grouting depth direction; the blowout prevention device is arranged on the inner wall of the tunnel and is aligned with a grouting point, one end of the drilling tool is connected with the electric rotary driving device and is externally connected with a grouting pipeline, and the other end of the drilling tool penetrates through the blowout prevention device and is connected with the non-return grouting head, so that the non-return grouting head is drilled into an external soil body of the tunnel through the drilling tool. The invention relates to the technical field of tunnel construction, and can solve the problem that a wall back double-liquid grouting device in the prior art cannot meet actual construction requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to an automatic double-fluid grouting device for the back of a subway tunnel wall. Background Art

[0002] During the construction of a subway tunnel, when the shield machine is advancing and turning, due to the damage of the back soil mass, grouting reinforcement is required to provide a back force to ensure its turning curve. The existing double-fluid grouting device for the back of a subway tunnel wall uses a traditional drill to lead a hole and then connects a grouting pipeline for grouting. During the grouting process, only continuous grouting at a single depth can be achieved, and the grouting range is limited.

[0003] However, during the actual grouting process for the back of a subway tunnel wall, especially during the soil reinforcement process behind the shield during propulsion, it is often required to reinforce the soil outside the tunnel in multiple layers. As a result, the existing double-fluid grouting device for the back of the wall cannot meet the actual construction requirements. Therefore, an automatic double-fluid grouting device for the back of a subway tunnel wall is needed, which can solve the problem that the existing double-fluid grouting device for the back of the wall cannot meet the actual construction requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic double-fluid grouting device for the back of a subway tunnel wall, which can solve the problem that the existing double-fluid grouting device for the back of the wall cannot meet the actual construction requirements.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] An automatic double-fluid grouting device for the back of a subway tunnel wall includes: a check-valve grouting head, an anti-spray device, an electric walking drive device, and an electric rotation drive device; the electric walking drive device is fixedly installed beside the grouting point of the tunnel and is arranged along the grouting depth direction, the electric rotation drive device is installed on the electric walking drive device, so that the electric rotation drive device can be movably arranged in the tunnel along the grouting depth direction through the electric walking drive device; the anti-spray device is arranged on the inner wall of the tunnel and is aligned with the grouting point, one end of the drill is connected to the electric rotation drive device and is externally connected to the grouting pipeline, and the other end of the drill penetrates through the anti-spray device and is connected to the check-valve grouting head, so that the check-valve grouting head can be drilled into the external soil mass of the tunnel through the drill.

[0007] The electric walking drive device includes a walking rack column, a walking gear, and a sliding sleeve; the walking rack column is arranged beside the grouting point along the grouting depth direction, and a rack is provided on one side of the walking rack column close to the grouting point; the walking gear is rotatably arranged in the sliding sleeve, and the sliding sleeve is slidably sleeved on the walking rack column, so that the rack of the walking rack column meshes with the walking gear for transmission; the electric rotation drive device is installed on the outside of the sliding sleeve.

[0008] Two limiting parts are arranged at intervals on the travel rack column. The sliding sleeve can contact one of the limiting parts when traveling, so that the sliding sleeve can travel back and forth between the two limiting parts on the travel rack column.

[0009] The blowout prevention device comprises a sealing sleeve and a compression sleeve. The sealing sleeve is connected to the drilling tool. The lower end of the sealing sleeve is arranged to align with the grouting point. An installation groove is formed on the upper part of the sealing sleeve. The lower part of the compression sleeve is sealably inserted in the upper installation groove of the sealing sleeve. The drilling tool passes through the compression sleeve.

[0010] A plurality of extension rods are arranged around the top of the compression sleeve.

[0011] The anti-return grouting head is formed with an annular groove, in which a plurality of grouting holes are formed at intervals. The sealing gasket is embedded in the annular groove and covers the outer sides of the plurality of grouting holes. A grouting gap is formed between the sealing gasket, the annular groove and the grouting holes.

[0012] The end of the anti-return grouting head away from the drilling tool is in a pointed structure, and a plurality of stirring plates are formed at the pointed structure.

[0013] The electric rotary drive device is sealed and connected to the drilling tool via two sealing rings arranged at intervals.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention is provided with an electric travel drive device and an electric rotation drive device. The electric travel drive device is used to lead the drill rod to the soil outside the tunnel at the grouting hole, and the electric rotation drive device is used to rotate the drill tool at a high speed to prevent the double-liquid slurry from solidifying and holding the drill tool. At the same time, the two limit parts are used to control the circular travel of the drill rod to realize the grouting reinforcement behind the tunnel wall, and can meet the double-liquid grouting requirements in the soil body at different depth ranges, which is beneficial to improving the automation degree and efficiency of the grouting process, and is particularly suitable for the reinforcement of the soil body behind the wall during shield advancement.

[0016] 2. The present invention is provided with a non-return grouting head, which can economically achieve a one-way non-return effect through an annular groove with grouting holes and a sealing gasket, thereby preventing the double liquid slurry from flowing back during the grouting process, especially when the rod is removed, and clogging the grouting pipeline. At the same time, the stirring plate and the pointed structure can greatly improve the ground-breaking ability of the drill rod without affecting the drill rod passing through the blowout prevention device.

[0017] 3. The blowout prevention device of the present invention can seal the drill tool through the sealing sleeve without affecting the rotation of the drill tool, thereby playing an effective blowout prevention role during the grouting process. At the same time, the compression sleeve and the sealing sleeve are installed tightly, which facilitates manual disassembly and assembly and control of the sealing degree, thereby ensuring the rotation of the drill tool and playing an effective blowout prevention role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features, and advantages of the present disclosure will become more apparent by describing exemplary embodiments of the present disclosure in more detail with reference to the accompanying drawings, in which, in the exemplary embodiments of the present disclosure, the same reference numerals generally represent the same components.

[0019] Figure 1 is a schematic structural diagram of a double-fluid grouting device for the back of a subway tunnel wall in the present invention;

[0020] Figure 2 is a schematic structural diagram of a reverse grouting head in a double-fluid grouting device for the back of a subway tunnel wall in the present invention.

[0021] In the figure, 1 is a reverse grouting head, 2 is an anti-blowout device, 21 is a sealing sleeve, 22 is a pressing sleeve, 23 is an extension rod, 3 is an electric walking drive device, 31 is a walking rack column, 32 is a walking gear, 33 is a sliding sleeve, 34 is a limiting part, 4 is a tunnel, 5 is an electric rotary drive device, 51 is a sealing ring, 6 is a grouting hole, 7 is a gasket, 8 is a stirring plate, and 9 is a drill tool. Detailed Embodiment

[0022] The following further details a double-fluid grouting device for the back of a subway tunnel wall proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0023] Please refer to the attached Figure 1 , a double-fluid grouting device for the back of a subway tunnel wall, including a reverse grouting head 1, an anti-blowout device 2, an electric walking drive device 3, and an electric rotary drive device 5; the electric walking drive device 3 is fixedly installed beside the grouting point of the tunnel 4 through a mounting member and is arranged along the grouting depth direction, the electric rotary drive device 5 is installed on the electric walking drive device 3, so that the electric rotary drive device 5 can be movably arranged in the tunnel 4 along the grouting depth direction through the electric walking drive device 3; the anti-blowout device 2 is arranged on the inner wall of the tunnel 4 and is aligned with the grouting point, one end of the drill tool 9 is connected to the rotary drive end of the electric rotary drive device 5 and is externally connected to a grouting pipeline, and the other end of the drill tool 9 penetrates through the anti-blowout device 2 and is connected to the reverse grouting head 1, so that the drill tool 9 drills into the external soil body of the tunnel 4 through the reverse grouting head 1.

[0024] The electric walking drive device 3 is used to control the movement of the electric rotary drive device 5 and the drill tool 9, so as to realize the pilot hole of the drill tool 9 into the soil outside the tunnel 4 through the non-return grouting head 1. After the drill tool 9 is externally connected to the grouting pipeline, the double slurry grouts and consolidates the soil at the corresponding depth outside the tunnel 4 through the drill tool 9 and the non-return grouting head 1. The blowout prevention device 2 is used for preventing the blowout of the double slurry during the grouting process. The electric rotary drive device 5 drives the drill tool 9 to rotate at a high speed through the rotary drive end, so as to avoid the double slurry from solidifying and holding the drill tool 9. The electric rotary drive device 5 and the drill tool 9 can adopt conventional drilling and grouting equipment in the field, which will not be elaborated here.

[0025] Please refer to the appendix Figure 1 As shown, the electric walking drive device 3 includes a walking rack column 31, a walking gear 32 and a sliding sleeve 33; the walking rack column 31 is arranged beside the grouting point along the depth direction of the grouting, and a rack is provided on one side of the walking rack column 31 close to the grouting point; the walking gear 32 is rotatably arranged in the sliding sleeve 33 through a wheel shaft, and the sliding sleeve 33 is slidably sleeved on the walking rack column 31, so that the rack of the walking rack column 31 meshes with the walking gear 32 for transmission; the electric rotary drive device 5 is installed on the outside of the sliding sleeve 33.

[0026] Preferably, a motor with a bidirectional rotation function can be installed in the sliding sleeve 33, and the drive shaft of the motor is coaxially connected with the wheel shaft of the walking gear 32, so as to control the forward or reverse rotation of the walking gear 32 through the motor, and then realize the forward or reverse movement of the sliding sleeve 33 along the rack of the walking rack column 31 through the meshing transmission between the walking gear 32 and the rack, ensuring that the sliding sleeve 33 can drive the electric rotary drive device 5 and the drill tool 9 to move bidirectionally along the grouting depth direction, meeting the requirements of double-fluid grouting.

[0027] Please refer to the appendix Figure 1 As shown, two limiting parts 34 are arranged at intervals on the walking rack column 31, and the sliding sleeve 33 can contact one of the limiting parts 34 when walking, so that the sliding sleeve 33 walks back and forth between the two limiting parts 34 on the walking rack column 31.

[0028] The two limiting parts 34 are used to limit the walking range of the sliding sleeve 33 on the walking rack column 31, so as to control the reciprocating walking stroke of the electric rotary drive device 5 and the drill tool 9 following the sliding sleeve 33, and then be able to meet the double-fluid grouting and consolidation requirements of the soil in different depth ranges outside the tunnel 4, and be able to avoid the double slurry from solidifying and holding the drill tool 9.

[0029] Preferably, trigger switches can be installed on the limiting part 34 and the sliding sleeve 33. When the sliding sleeve 33 contacts the limiting part 34, the trigger switch is turned on, sending an electric signal to the motor to make the motor rotate in the reverse direction, realizing the reverse movement of the sliding sleeve 33, so as to realize the reciprocating walking function of the sliding sleeve 33 through the two limiting parts 34, improving the automation degree and efficiency of the grouting process.

[0030] Please refer to the appendix Figure 1 , the blowout preventer device 2 includes a sealing sleeve 21 and a pressing sleeve 22. The sealing sleeve 21 is hermetically sleeved on the drill tool 9. The lower end of the sealing sleeve 21 is aligned with the grouting point. An installation groove is formed in the upper part of the sealing sleeve 21. The lower part of the pressing sleeve 22 is hermetically inserted into the upper installation groove of the sealing sleeve 21, and the drill tool 9 penetrates through the pressing sleeve 22.

[0031] Preferably, the sealing sleeve 21 can adopt a mechanical compression sealing gasket or packing of the prior art to seal the drill tool 9 at the grouting point, which can play a role in preventing blowout during the grouting process. The lower part of the pressing sleeve 22 is pressed in the installation groove of the sealing sleeve 21. By the different pressing degrees of the pressing sleeve 22 and the sealing sleeve 21, the sealing degree of the blowout preventer device 2 to the drill tool 9 can be adjusted, so as to ensure the sealing and blowout prevention effect while the drill tool 9 rotates.

[0032] Please refer to the appendix Figure 1 , a plurality of extension rods 23 are circumferentially arranged at the top of the pressing sleeve 22.

[0033] Through the arrangement of the extension rods 23, it is convenient to disassemble and assemble the pressing sleeve 22 manually, and it is also convenient to control the pressing and sealing degree of the sealing sleeve 21 and the pressing sleeve 22, ensuring the rotation and blowout prevention function of the drill tool 9. Preferably, two extension rods 23 are symmetrically arranged.

[0034] Please refer to the appendix Figure 2 , an annular groove is formed on the non-return grouting head 1. A plurality of grouting holes 6 are formed at intervals in the annular groove. The sealing gasket 7 is embedded in the annular groove and covers the outside of the plurality of grouting holes 6. A grouting gap is formed between the sealing gasket 7, the annular groove and the grouting holes 6.

[0035] Through the arrangement of the grouting holes 6 and the sealing gasket 7, the one-way non-return function can be economically realized while ensuring the double-fluid grouting, preventing the double-fluid slurry from flowing back during the grouting process, especially when the drill tool 9 is removed, which may cause the grouting pipeline to be blocked.

[0036] Please refer to the appendix Figure 2 , the end of the non-return grouting head 1 away from the drill tool 9 is in a pointed structure, and a plurality of stirring plates 8 are formed at the pointed structure.

[0037] Through the arrangement of the pointed structure and the stirring plates 8, the soil breaking ability of the drill tool 9 can be greatly improved, and the drilling pilot hole efficiency can be improved.

[0038] Preferably, the outer diameter of the stirring plate 8 does not exceed the inner diameter of the sealing sleeve 21, and the outer diameter of the stirring plate 8 can be 25 mm. Within a diameter range of 25 mm, the stirring plates 8 are added at the pointed structure of the non-return grouting head 1, which can improve the soil breaking ability of the non-return grouting head 1 without affecting its passing through the blowout preventer device 2.

[0039] Please refer to the appendix Figure 1 Inside the electric rotary drive device 5, it is hermetically connected to the drill tool 9 through two sealing rings 51 arranged at intervals.

[0040] Through the arrangement of the sealing rings 51, it is ensured that the drill tool 9 still has a high compressive sealing ability when rotating at high speed.

[0041] Please refer to the appendix Figure 1 and the appendix Figure 2 The usage method of the present invention is as follows:

[0042] 1. Transport the automatic double-fluid grouting device behind the wall of the subway tunnel to the reserved post-grouting holes behind the wall in the tunnel 4, and fix the electric walking drive device 3 beside the grouting point through chemical bolts, and fix the anti-spray device 2 at the grouting point.

[0043] 2. Drive the electric rotary drive device 5 and the drill tool 9 to move along the grouting direction through the electric walking drive device 3 to realize the hole-leading work and ensure the depth of the hole-leading. The drill tool 9 continuously rotates under the drive of the electric rotary drive device 5 at the same time.

[0044] Through the pointed structure of the check-valve grouting head 1 and the stirring plate 8, the earth-breaking ability of the check-valve grouting head 1 can be greatly improved, and the drilling efficiency of the drill tool 9 can be improved.

[0045] 3. After the hole is led to the specified depth, the drill tool 9 is connected to the grouting pipeline, and the double-fluid slurry mixed with water glass and cement slurry is injected into the soil through the grouting holes 6 of the drill tool 9 and the check-valve grouting head 1 through the grouting gap to realize the reinforcement of the soil by double-fluid grouting. By adjusting the ratio of cement slurry and water glass in the double-fluid slurry, the curing time of the double-fluid slurry can be adjusted. Preferably, the curing time of the present invention is 2 minutes, which can quickly provide the back force.

[0046] 4. Through the electric walking drive device 3, the double-fluid grouting reinforcement work of the soil in different depth ranges outside the tunnel 4 can be realized. During the grouting process, the drill tool 9 realizes automatic cyclic walking grouting through the electric walking drive device 3 and its limiting part 34. At the same time, through the sealing gasket 7 installed outside the grouting hole 6, the one-way check-valve function can be economically realized.

[0047] 5. After the grouting is completed, clean the grouting pipeline and remove the automatic double-fluid grouting device behind the wall of the subway tunnel.

[0048] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the protection scope of the claims.

Claims

1. An automatic double-liquid grouting device behind the wall of a subway tunnel, characterized in that: include: A non-return grouting head (1), a blowout prevention device (2), an electric travel drive device (3) and an electric rotation drive device (5); The electric travel drive device (3) is fixedly installed beside the grouting point of the tunnel (4) and is arranged along the grouting depth direction. The electric rotation drive device (5) is installed on the electric travel drive device (3), so that the electric rotation drive device (5) is movably arranged in the tunnel (4) along the grouting depth direction through the electric travel drive device (3); the blowout prevention device (2) is arranged on the inner wall of the tunnel (4) and is aligned with the grouting point. One end of the drilling tool (9) is connected to the electric rotation drive device (5) and is externally connected to the grouting pipeline. The other end of the drilling tool (9) passes through the blowout prevention device (2) and is connected to the non-return grouting head (1), so that the drilling tool (9) and the non-return grouting head (1) are drilled into the external soil of the tunnel (4).

2. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 1, characterized in that: The electric travel drive device (3) comprises a travel rack column (31), a travel gear (32) and a sliding sleeve (33); the travel rack column (31) is arranged beside the grouting point along the depth direction of grouting, and a rack is arranged on the side of the travel rack column (31) close to the grouting point; the travel gear (32) is rotatably arranged in the sliding sleeve (33), and the sliding sleeve (33) is slidably sleeved on the travel rack column (31), so that the rack of the travel rack column (31) and the travel gear (32) are meshed and transmitted; the electric rotary drive device (5) is installed on the outside of the sliding sleeve (33).

3. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 2, characterized in that: Two limiting parts (34) are arranged on the travel rack column (31) at intervals, and the sliding sleeve (33) can contact one of the limiting parts (34) when traveling, so that the sliding sleeve (33) can travel back and forth between the two limiting parts (34) on the travel rack column (31).

4. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 1, characterized in that: The blowout prevention device (2) comprises a sealing sleeve (21) and a compression sleeve (22). The sealing sleeve (21) is sealingly sleeved on the drilling tool (9). The lower end of the sealing sleeve (21) is arranged to align with the grouting point. The upper part of the sealing sleeve (21) is formed with a mounting groove. The lower part of the compression sleeve (22) is sealingly inserted into the upper mounting groove of the sealing sleeve (21). The drilling tool (9) passes through the compression sleeve (22).

5. The automatic double-liquid grouting device behind the subway tunnel wall as claimed in claim 4, characterized in that: A plurality of extension rods (23) are arranged around the top of the compression sleeve (22).

6. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 1, characterized in that: The anti-return grouting head (1) is formed with an annular groove, and a plurality of grouting holes (6) are formed at intervals in the annular groove. The sealing gasket (7) is embedded in the annular groove and covers the outer sides of the plurality of grouting holes (6). A grouting gap is formed between the sealing gasket (7), the annular groove and the grouting holes (6).

7. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 1 or 6, characterized in that: The end of the anti-return grouting head (1) away from the drilling tool (9) is in a pointed structure, and a plurality of stirring plates (8) are formed at the pointed structure.

8. The automatic double-liquid grouting device behind the subway tunnel wall according to claim 1, characterized in that: The electric rotary drive device (5) is sealed and connected to the drilling tool (9) via two sealing rings (51) arranged at intervals.

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