Shield tunneling machine with tunneling and supporting functions

Abstract

The invention belongs to the technical field of shield tunnel construction, and discloses a shield tunneling machine with tunneling and supporting functions. The cutting mechanism is mounted at the head end of the main shell and is used for cutting a stratum; the propelling system is used for driving the main shell to advance and is matched with the cutting mechanism to realize tunneling; the inner shell is fixedly connected to the tail end of the main shell, the diameter of the inner shell is smaller than that of the main shell, and a grouting space is formed between the outer wall of the inner shell and the inner wall of a tunnel formed by tunneling; and the grouting system is used for injecting lining slurry into the grouting space so as to form a lining for supporting the tunnel. When the shield tunneling machine is used for tunneling, lining slurry is injected into the grouting space through the grouting system so as to form a lining used for supporting a tunnel, tunneling and supporting can be conducted at the same time, and the effects that the tunneling speed of the shield tunneling machine can be increased, the construction period can be greatly shortened, and the construction risk can be reduced are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield tunnel construction, and particularly relates to a shield machine with both tunneling and supporting functions. Background Art

[0002] With the acceleration of the urbanization process and the continuous advancement of infrastructure construction, the development of underground space has become an important part of modern urban construction. As the core equipment for underground tunnel construction, the technical level of the shield machine directly affects the project efficiency, construction safety, and construction cost. During construction with traditional shield machines, the shield needs to first tunnel a distance equal to the width of one segment, and then stop to assemble segments for support; this operation mode of separating tunneling and support not only prolongs the construction period, reduces the tunneling rate of the shield machine, but also increases the construction risk; therefore, we propose a shield machine with both tunneling and supporting functions to solve the above problems. Summary of the Invention

[0003] To solve the above problems, the present invention provides a shield machine with both tunneling and supporting functions, which solves the problem that traditional shield machines cannot perform tunneling and support simultaneously during construction.

[0004] The present invention is realized through the following scheme: A shield machine with both tunneling and supporting functions, comprising: A main housing; A cutting mechanism installed at the front end of the main housing and used for cutting the formation; A propulsion system for driving the main housing forward and cooperating with the cutting mechanism to achieve tunneling; An inner housing fixedly connected to the rear end of the main housing and having a diameter smaller than that of the main housing, and a grouting space is formed between the outer wall of the inner housing and the inner wall of the tunnel formed by tunneling; and A grouting system for injecting lining slurry into the grouting space to form a lining for supporting the tunnel. The grouting system includes a grouting device at the tail of the shield machine and a grouting pipe connected to the grouting device and introduced to the inner housing. The grouting pipe passes through the inner housing and communicates with the grouting space. The grouting pipe is made of a flexible hose, and the length of the grouting pipe meets the length requirement of the tunnel excavated by the shield machine.

[0005] The further improvement of the shield machine with both tunneling and supporting functions of the present invention lies in that the grouting device includes a slurry barrel and a grouting pump. The slurry barrel is used for storing lining slurry, and the grouting pump is connected to the slurry barrel for pumping the lining slurry in the slurry barrel and transporting it to the grouting pipe.

[0006] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the grouting pipe includes a main pipe and a plurality of branch pipes. One end of the main pipe is connected to a grouting pump, and the other end of the main pipe is introduced from inside the inner casing and extends into the main casing. The plurality of branch pipes are arranged circumferentially along the main casing, and one end of each of the plurality of branch pipes is connected to the second end of the main pipe. The other ends of the plurality of branch pipes all extend inwardly from the inner wall of the main casing towards the inner casing to insert into the grouting space.

[0007] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the tail end of the inner casing extends out of the main casing and forms an extension section for temporarily supporting the lining slurry so that the lining slurry forms a lining after solidification.

[0008] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the propulsion system includes a jacking device and a jacking support assembly. The output end of the jacking device is fixed to the jacking support assembly, and one end of the jacking device away from the output end is fixed to the main casing. One end of the jacking support assembly away from the output end of the jacking device is used to jack against the inner wall of the already formed lining to provide a reaction force to the jacking device so that the jacking device drives the main casing to move forward during jacking.

[0009] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the jacking device includes a fixing ring fixed to the inner wall of the main casing and a propulsion cylinder fixed to the fixing ring. The jacking support assembly includes a support ring connected to the output end of the propulsion cylinder and a plurality of support cylinders arranged along the outer peripheral surface of the support ring.

[0010] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the telescopic direction of the propulsion cylinder is along the axial direction of the inner casing, and the telescopic direction of the support cylinder is along the radial direction of the inner casing.

[0011] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the jacking support assembly further includes a plurality of shoe soles, and the plurality of shoe soles are respectively fixed to the output ends of the plurality of support cylinders and are used to jack against the inner wall of the already formed lining.

[0012] A further improvement of the shield machine with both tunneling and support functions according to the present invention lies in that the propulsion cylinder includes a propulsion ring, a rolling support, a connecting ring, and a plurality of cylinder bodies. The plurality of cylinder bodies are arranged annularly on the fixing ring. The propulsion ring is fixedly connected to the output ends of the plurality of cylinder bodies. The first end of the connecting ring is fixedly connected to the side of the propulsion ring away from the cylinder bodies, and the second end of the connecting ring is fixedly connected to the support ring. The rolling support is fixed to the bottom of the propulsion ring and is used to support the propulsion ring to slide along the bottom of the lining.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: While the shield machine is tunneling, the present invention injects lining slurry into the grouting space formed between the outer wall of the inner housing and the inner wall of the tunnel formed by tunneling through the grouting system to form a lining for supporting the tunnel, enabling simultaneous tunneling and support, and having effects such as improving the tunneling rate of the shield machine, greatly shortening the construction period, and reducing construction risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structural schematic diagram of the shield machine of the present invention is shown.

[0015] Figure 2 The present invention is shown Figure 1 in the schematic structural diagram of the A-A section.

[0016] Figure 3 The present invention is shown Figure 1 in the schematic structural diagram of the B-B section.

[0017] Figure 4 The present invention is shown Figure 1 in the schematic structural diagram of the C-C section.

[0018] In the figure: 1, main housing; 2, inner housing; 201, ring plate; 202, auxiliary housing; 203, grout replenishment space; 3, jacking device; 301, fixed ring; 302, cylinder body; 303, propulsion ring; 304, rolling support; 305, connecting ring; 4, jacking assembly; 401, support ring; 402, support cylinder; 403, shoe; 5, grouting system; 501, slurry bucket; 502, slurry inlet pipe; 503, grouting pump; 504, main pipe; 505, branch pipe; 6, cutting mechanism; 601, mounting ring; 602, main drive; 603, cutter head; 604, soil chamber; 605, screw conveyor; 7, lining. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to solve the problem that traditional shield machines cannot tunnel and support simultaneously during construction, the present invention provides a shield machine with both tunneling and support functions. The following further describes a shield machine with both tunneling and support functions with specific embodiments in conjunction with the drawings.

[0020] Referring to Figures 1 to 4 as shown, a shield machine with both tunneling and support functions includes: main housing 1; a cutting mechanism 6 installed at the front end of the main housing 1 and used for cutting the formation; a propulsion system for driving the main housing 1 forward and cooperating with the cutting mechanism 6 to achieve tunneling; an inner housing 2 fixedly connected to the rear end of the main housing 1 and having a diameter smaller than that of the main housing 1, and a grouting space is formed between the outer wall of the inner housing 2 and the inner wall of the tunnel formed by tunneling; and The grouting system 5 is used to inject lining slurry into the grouting space to form a lining 7 for supporting the tunnel. The grouting system 5 includes a grouting device located at the tail of the shield machine and a grouting pipe that is connected to the grouting device and introduced to the inner shell 2. The grouting pipe passes through the inner shell 2 and is connected to the grouting space. The grouting pipe is a flexible pipe, and the length of the grouting pipe meets the length requirement of the tunnel excavated by the shield machine.

[0021] While the shield machine is tunneling, the lining slurry is injected into the grouting space formed between the outer wall of the inner shell 2 and the inner wall of the tunnel formed by tunneling through the grouting system 5 to form a lining 7 for supporting the tunnel, so that tunneling and support can be carried out in parallel, and the tunneling speed of the shield machine can be increased, the construction period can be greatly shortened, and the construction risk can be reduced; the improvement of the high-speed construction ability will greatly reduce the construction cost.

[0022] Among them, referring to Figure 1 As shown, the grouting device includes a slurry bucket 501 and a grouting pump 503. The slurry bucket 501 is used to store the lining slurry, and the grouting pump 503 is connected to the slurry bucket 501 and is used to extract the lining slurry in the slurry bucket 501 and transport it to the grouting pipe. The grouting pipe includes a main pipe 504 and a plurality of branch pipes 505. One end of the main pipe 504 is connected to the grouting pump 503, and the other end of the main pipe 504 is introduced from the inside of the inner shell 2 and extends into the main shell 1. The plurality of branch pipes 505 are arranged circumferentially along the main shell 1, and one end of each of the plurality of branch pipes 505 is connected to the second end of the main pipe 504. The other ends of the plurality of branch pipes 505 all extend inward from the inner wall of the main shell 1 towards the inner shell 2 to insert into the grouting space. The inner shell 2 extends out of the tail end of the main shell 1 and forms an extension section for temporarily supporting the lining slurry so that the lining slurry forms a lining 7 after curing.

[0023] Specifically, in this embodiment, the inner shell 2 includes a sub-shell 202 and a ring plate 201. The ring plate 201 is fixed to the inner side of the tail end of the main shell 1. The first end of the sub-shell 202 is fixed to the ring plate 201, so that the first end of the sub-shell 202, the ring plate 201, and the tail end of the main shell 1 enclose a supplementary grouting space 203 connected to the grouting space. The second end of the sub-shell 202 extends out of the main shell 1 and forms a grouting space between it and the inner wall of the tunnel formed by tunneling. The second ends of the plurality of branch pipes 505 all pass through the ring plate 201 and are connected to the supplementary grouting space. Furthermore, the grouting pump 503 is connected to the slurry bucket 501 through a feed pipe 502. The diameter of the main pipe 504 is not less than the sum of the diameters of the plurality of branch pipes 505; the slurry bucket 501 can be placed at the bottom of the formed lining 7. By adopting the above design, the grouting pump 503 is controlled to extract the lining slurry in the slurry bucket 501 through the slurry inlet pipe 502, and convey it to a plurality of branch pipes 505 through the main pipe 504, and then inject it into the grouting space through the plurality of branch pipes 505 to form a lining 7 for supporting the tunnel; the provided slurry replenishment space 203 allows the branch pipes 505 to output the lining slurry immediately to replenish the grouting space, and hiding the output ports of the branch pipes 505 in the slurry replenishment space 203 can also prevent blockage by fallen gravel; through the provided extension section, the formed grouting space can have a certain length, and the just-injected lining slurry can be supported by the extension section, so as to meet the requirement that when the secondary housing 202 gradually disengages from this area, the lining slurry in this area solidifies to form the lining 7, providing a certain support time for its solidification.

[0024] Among them, referring to Figure 1 As shown, the propulsion system includes a jacking device 3 and a jacking assembly 4. The output end of the jacking device 3 is fixed to the jacking assembly 4, and one end of the jacking device 3 far from the output end is fixed to the main housing 1. One end of the jacking assembly 4 far from the output end of the jacking device 3 is used to jack against the inner wall of the formed lining 7 to provide a reaction force to the jacking device 3 so that the jacking device 3 drives the main housing 1 to move forward when jacking. The jacking device 3 includes a fixing ring 301 fixed to the inner wall of the main housing 1 and a propulsion oil cylinder fixed to the fixing ring 301. The jacking assembly 4 includes a support ring 401 connected to the output end of the propulsion oil cylinder and a plurality of support oil cylinders 402 arranged along the outer peripheral surface of the support ring 401. The telescopic direction of the propulsion oil cylinder is along the axial direction of the inner housing 2, and the telescopic direction of the support oil cylinder 402 is along the radial direction of the inner housing 2. The jacking assembly 4 further includes a plurality of shoe soles 403, and the plurality of shoe soles 403 are respectively fixed to the output ends of the plurality of support oil cylinders 402 and are used to jack against the inner wall of the formed lining 7. The propulsion oil cylinder includes a propulsion ring 303, a rolling support 304, a connecting ring 305 and a plurality of oil cylinder bodies 302. The plurality of oil cylinder bodies 302 are arranged in a ring on the fixing ring 301. The propulsion ring 303 is fixedly connected to the output ends of the plurality of oil cylinder bodies 302. The first end of the connecting ring 305 is fixedly connected to the side of the propulsion ring 303 far from the oil cylinder body 302, and the second end of the connecting ring 305 is fixedly connected to the support ring 401. The rolling support 304 is fixed to the bottom of the propulsion ring 303 and is used to support the propulsion ring 303 to slide along the bottom of the lining 7.

[0025] Specifically, spaces for the main pipe 504 to pass through penetrate through the centers of the propulsion ring 303, the connecting ring 305 and the support ring 401, and the arrangement positions of the branch pipes 505 do not interfere with the arrangement positions of the oil cylinder bodies 302. By adopting the above design, control multiple support cylinders 402 to push the corresponding shoe 403 against the inner wall of the lining 7 to fix the support assembly 4 to the lining 7. Then control multiple cylinder bodies 302 to push the propulsion ring 303 and the connecting ring 305. Relying on the fixed support assembly 4 to provide reaction force, the main housing 1 can be pushed forward to achieve tunneling. After the cylinder body 302 is pushed out to the maximum distance, control multiple support cylinders 402 to pull the shoe 403 to retract and disengage from the inner wall of the lining 7. Then control multiple cylinder bodies 302 to retract to pull the propulsion ring 303 and the connecting ring 305, and further pull back the support assembly 4. Repeating this process can achieve continuous tunneling.

[0026] Among them, referring to Figure 1 As shown, the cutting mechanism 6 includes a mounting ring 601, a main drive 602, a cutter head 603, and a screw conveyor 605. The mounting ring 601 is fixed to the inner wall of the head end of the main housing 1. The main drive 602 is fixed at the central position of the mounting ring 601. The cutter head 603 is connected to the output end of the main drive 602 and is located in front of the main housing 1, so that a soil chamber 604 for accommodating the muck generated by the cutter head 603 cutting the formation is formed by enclosing the cutter head 603, the head end of the main housing 1, the mounting ring 601, and the main drive 602. The head end of the screw conveyor 605 communicates with the soil chamber 604, and the tail end of the screw conveyor 605 extends out of the inner housing 2 for transporting and discharging the muck in the soil chamber 604.

[0027] Specifically, in this embodiment, referring to Figures 2 - 4 As shown, a first through hole for the screw conveyor 605 to pass through is formed through the lower part of the fixed ring 301, and a second through hole for the screw conveyor 605 to pass through is formed through the lower part of the propulsion ring 303. The position of the screw conveyor 605 is complementary to the positions of the cylinder body 302 and the support assembly 4 without interference. By adopting the above design, control the main drive 602 to drive the cutter head 603 to rotate to cut the formation. The muck generated by the cutting enters the soil chamber 604, and then the muck in the soil chamber 604 is transported and discharged through the screw conveyor 605.

[0028] Based on the above shield machine with both tunneling and support functions, the present invention also proposes a control method for a shield machine with both tunneling and support functions, including the following steps: S1. Control multiple support cylinders 402 to push the corresponding shoe 403 against the inner wall of the lining 7 to fix the support assembly 4 to the inner wall of the lining 7. S2. Start the cutting mechanism 6 to cut the formation. S3. Control multiple cylinder bodies 302 to push against the propulsion ring 303 and the connection ring 305, and utilize the fixed jacking assembly 4 to provide a reaction force to push the main housing 1 forward to form a tunnel by tunneling, and form a grouting space between the outer wall of the inner housing 2 and the inner wall of the tunnel; while forming the grouting space, control the grouting pump 503 to extract the lining slurry in the slurry bucket 501, transport it through the main pipe 504 to multiple branch pipes 505, and transport it to the supplementary grouting space 203 through the second ends of the multiple branch pipes 505 to inject the lining slurry into the grouting space to form a lining 7 for supporting the tunnel; S4. When the multiple cylinder bodies 302 are pushed to the maximum distance, turn off the cutting mechanism 6 and the grouting pump 503. During this period, the lining slurry can be replenished into the slurry bucket 501; S5. Control multiple support cylinders 402 to pull the corresponding shoes 403 back to their original positions to separate the jacking assembly 4 from the inner wall of the lining 7; S6. Control multiple cylinder bodies 302 to pull the propulsion ring 303 and the connection ring 305 to pull the jacking assembly 4 back to its original position; S7. Repeat steps S1 - S6 until the tunnel tunneling is completed.

[0029] By adopting the above design, the synchronous operation of this method reduces the process conversion time, improves the construction efficiency, and shortens the construction period; timely support effectively controls the deformation of the excavation surface, reduces the formation disturbance, and reduces the risk of ground settlement; synchronous operation can better cope with complex geological conditions such as soft, fractured, and water-rich, improving the construction safety; effectively controlling the formation deformation reduces the impact on surrounding buildings and underground pipelines and reduces the construction risk.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0031] The present invention has been described in detail above in conjunction with the embodiments with reference to the drawings. Those of ordinary skill in the art can make various variations to the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation to the present invention, and the present invention will take the scope defined by the appended claims as the protection scope of the present invention.

Claims

1. A shield machine with both tunneling and supporting functions, characterized in that: include: main housing; A cutting mechanism mounted at the head end of the main housing and used for cutting the formation; A propulsion system for driving the main housing forward and cooperating with the cutting mechanism to achieve excavation; An inner shell body fixedly connected to the rear end of the main shell body and having a diameter smaller than that of the main shell body, wherein a grouting space is formed between the outer wall of the inner shell body and the inner wall of the tunnel formed by excavation; as well as The grouting system is used to inject lining slurry into the grouting space to form a lining for supporting the tunnel. The grouting system includes a grouting device located at the tail of the shield machine and a grouting pipe connected to the grouting device and introduced into the inner shell. The grouting pipe passes through the inner shell and is connected to the grouting space. The grouting pipe is a hose and the length of the grouting pipe meets the length requirement of the tunnel excavated by the shield machine.

2. The shield machine with both excavation and support functions as claimed in claim 1, characterized in that: The grouting equipment comprises a slurry barrel and a grouting pump. The slurry barrel is used to store lining slurry. The grouting pump is connected to the slurry barrel and is used to extract the lining slurry in the slurry barrel and transport it to the grouting pipe.

3. The shield machine with both excavation and support functions as claimed in claim 2, characterized in that: The grouting pipe includes a main pipe and multiple branch pipes, one end of the main pipe is connected to the grouting pump, the other end of the main pipe is introduced from the inside of the inner shell and extends into the main shell, the multiple branch pipes are arranged circumferentially along the main shell, and one end of the multiple branch pipes is connected to the second end of the main pipe, and the other ends of the multiple branch pipes extend along the inner wall of the main shell toward the inner shell to be inserted into the grouting space.

4. The shield machine with both excavation and support functions as claimed in claim 3, characterized in that: The inner shell extends out of the rear end of the main shell and forms an extended section for temporarily supporting the lining slurry so that the lining slurry forms a lining after solidification.

5. The shield machine with both excavation and support functions as claimed in claim 1, characterized in that: The propulsion system includes a pushing device and a pushing support assembly, wherein the output end of the pushing device is fixed to the pushing support assembly, and the end of the pushing device away from the output end is fixed to the main shell body, and the end of the pushing support assembly away from the output end of the pushing device is used for pushing to the formed inner wall of the lining to provide a reaction force to the pushing device so that the pushing device drives the main shell body forward during pushing.

6. The shield machine with both excavation and support functions as claimed in claim 5, characterized in that: The pushing device includes a fixed ring fixed to the inner wall of the main shell and a propulsion cylinder fixed on the fixed ring, and the supporting assembly includes a supporting ring connected to the output end of the propulsion cylinder and a plurality of supporting cylinders arranged along the outer circumference of the supporting ring.

7. The shield machine with both excavation and support functions as claimed in claim 6, characterized in that: The extension and retraction direction of the propulsion oil cylinder is along the axial direction of the inner shell, and the extension and retraction direction of the support oil cylinder is along the radial direction of the inner shell.

8. The shield machine with both excavation and support functions as claimed in claim 7, characterized in that: The supporting assembly further comprises a plurality of supporting shoes, and the plurality of supporting shoes are respectively fixed to the output ends of the plurality of supporting oil cylinders, and are used for supporting to the formed inner wall of the lining.

9. The shield machine with both excavation and support functions as claimed in claim 8, characterized in that: The propulsion cylinder includes a propulsion ring, a rolling support, a connecting ring and a plurality of cylinder bodies. The plurality of cylinder bodies are arranged in a ring on a fixed ring. The propulsion ring is fixedly connected to the output ends of the plurality of cylinder bodies. The first end of the connecting ring is fixedly connected to a side of the propulsion ring away from the cylinder body, and the second end of the connecting ring is fixedly connected to the support ring. The rolling support is fixed to the bottom of the propulsion ring to support the propulsion ring to slide along the bottom of the lining.

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