Shield tunneling machine operation method capable of achieving parallel synchronous operation control over tunneling and supporting

Abstract

The invention belongs to the technical field of shield tunnel construction, and discloses a shield tunneling machine operation method capable of realizing parallel and synchronous operation control of tunneling and supporting, which comprises the following steps: S1, providing a shield tunneling machine, the shield tunneling machine comprises a main shell, a cutting mechanism installed at the head end of the main shell, a propelling system, an inner shell and a grouting system, wherein the inner shell is fixedly connected to the tail end of the main shell, and the diameter of the inner shell is smaller than that of the main shell. S2, a cutting mechanism is started to cut the stratum, a propelling system is synchronously controlled to drive a main shell to advance, a tunnel is formed through tunneling, and a grouting space is formed between the outer wall of an inner shell and the inner wall of the tunnel; and when the grouting space is formed, the grouting system is controlled to inject lining grout into the grouting space to form a lining, and in the continuous tunneling process, the tunnel is supported through the formed lining. The method can realize parallel tunneling and supporting, and has the effects of improving the tunneling speed of the shield tunneling machine, greatly shortening the construction period, reducing the construction risk and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield tunnel construction, and particularly relates to an operation method for a shield machine capable of parallel and synchronous operation control of tunneling and support. Background Art

[0002] With the acceleration of the urbanization process, the demand for underground space development is increasing day by day. Due to its advantages such as safety, high efficiency, and environmental protection, the shield method has become the main method for the construction of urban subways, tunnels and other underground projects. However, the traditional shield construction adopts an operation mode of separating tunneling and support, which has problems such as low construction efficiency, large formation disturbance, and difficult control of ground settlement, and it is difficult to meet the construction requirements under complex geological conditions and urban environments. Therefore, we propose an operation method for a shield machine capable of parallel and synchronous operation control of tunneling and support to solve the above problems. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides an operation method for a shield machine capable of parallel and synchronous operation control of tunneling and support, which solves the problems of low construction efficiency, large formation disturbance, and difficult control of ground settlement caused by the traditional shield construction adopting an operation mode of separating tunneling and support.

[0004] The present invention is realized through the following scheme: An operation method for a shield machine capable of parallel and synchronous operation control of tunneling and support, comprising the following steps: S1. Provide a shield machine, which includes a main housing, a cutting mechanism installed at the head end of the main housing, a propulsion system, an inner housing fixedly connected to the tail end of the main housing and having a diameter smaller than that of the main housing, and a grouting system; S2. Start the cutting mechanism to cut the formation, and simultaneously control the propulsion system to drive the main housing forward to form a tunnel, and make a grouting space formed between the outer wall of the inner housing and the inner wall of the tunnel; while forming the grouting space, control the grouting system to inject lining slurry into the grouting space to form a lining, and during the continuous tunneling process, support the tunnel through the formed lining; S3. After the tunneling of the tunnel is completed, first turn off the cutting mechanism and the propulsion system, and then turn off the grouting system.

[0005] The further improvement of the operation method for a shield machine capable of parallel and synchronous operation control of tunneling and support of the present invention lies in that the grouting system includes a slurry barrel, a grouting pump, and a grouting pipe. The grouting pump is connected to the slurry barrel, one end of the grouting pipe is connected to the grouting pump, and the other end of the grouting pipe passes through the inner housing and is connected to the grouting space; Controlling the grouting system to inject lining slurry into the grouting space specifically includes the steps of: controlling the grouting pump to pump out the lining slurry in the slurry barrel and transport it to the grouting space through the grouting pipe.

[0006] A further improvement of the operation method of the shield machine with parallel and synchronous operation control of tunneling and support in the present invention lies in that the propulsion system includes a jacking device and a jacking assembly. The jacking device includes propulsion cylinders fixed to the inner wall of the main housing. The jacking 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; Controlling the propulsion system to drive the main housing forward specifically includes the steps of: Controlling the output ends of the plurality of support cylinders to extend and abut against the inner wall of the formed lining, so as to fix the jacking assembly to the inner wall of the lining; Controlling the propulsion cylinders to push the support ring, and using the fixed jacking assembly to provide a reaction force to achieve pushing the main housing forward.

[0007] A further improvement of the operation method of the shield machine with parallel and synchronous operation control of tunneling and support in the present invention lies in that when performing step S2, when the propulsion cylinders are pushed to the maximum distance, the cutting mechanism and the grouting system are turned off. First, control the output ends of the plurality of support cylinders to retract and reset to separate the jacking assembly from the inner wall of the lining, and then control the propulsion cylinders to pull back the support ring to pull the jacking assembly back to its original position; Before performing step S3, repeat step S2 until the tunneling of the tunnel is completed.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: By controlling the shield machine while 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, and can realize parallel tunneling and support, having effects such as improving the tunneling rate of the shield machine, greatly shortening the construction period, and reducing the construction risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Shows a flow chart of the control method of the present invention.

[0010] Figure 2 Shows a schematic structural diagram of the shield machine of the present invention.

[0011] Figure 3 Shows the present invention Figure 2 Schematic cross-sectional structure diagram of A-A in the present invention.

[0012] Figure 4 Shows the present invention Figure 2 Schematic cross-sectional structure diagram of B-B in the present invention.

[0013] Figure 5 Shows the present invention Figure 2 Schematic cross-sectional structure diagram of C-C in the present invention.

[0014] In the figure: 1, main housing; 2, inner housing; 201, ring plate; 202, auxiliary housing; 203, grouting space; 3, pushing device; 301, pushing oil cylinder; 4, propping assembly; 401, support ring; 402, support oil cylinder; 5, grouting system; 501, slurry bucket; 502, grouting pump; 503, main pipe; 504, branch pipe; 6, cutting mechanism; 7, lining. Specific implementation mode

[0015] In order to solve the problems of low construction efficiency, large formation disturbance and difficult control of ground settlement caused by the traditional shield construction method of separating tunneling and support, the present invention provides a shield machine operation method capable of parallel and synchronous operation control of tunneling and support. The following further describes the shield machine operation method capable of parallel and synchronous operation control of tunneling and support with specific embodiments in conjunction with the drawings.

[0016] Refer to Figures 1 to 5 As shown, a shield machine operation method capable of parallel and synchronous operation control of tunneling and support includes the following steps: S1. Provide a shield machine, which includes a main housing 1, a cutting mechanism 6 installed at the front end of the main housing 1, a propulsion system, 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 system 5; S2. Start the cutting mechanism 6 to cut the formation, and simultaneously control the propulsion system to drive the main housing 1 forward to excavate a tunnel, so that a grouting space is formed between the outer wall of the inner housing 2 and the inner wall of the tunnel; while forming the grouting space, control the grouting system 5 to inject lining slurry into the grouting space to form a lining 7, and during the continuous tunneling process, support the tunnel through the formed lining; S3. After the tunneling of the tunnel is completed, first turn off the cutting mechanism 6 and the propulsion system, and then turn off the grouting system 5.

[0017] While the shield machine is tunneling, the grouting system 5 injects lining slurry into the grouting space formed between the outer wall of the inner housing 2 and the inner wall of the tunnel formed by tunneling to form a lining 7 for supporting the tunnel, so that tunneling and support can be carried out in parallel, which can improve the tunneling rate of the shield machine, greatly shorten the construction period, reduce construction risks, cause less disturbance to the formation, and the ground settlement can be controlled, etc.; the improvement of the high-speed construction ability will greatly reduce the construction cost.

[0018] Among them, the grouting system 5 includes a slurry bucket 501, a grouting pump 502 and a grouting pipe. The grouting pump 502 is communicated with the slurry bucket 501. One end of the grouting pipe is communicated with the grouting pump 502, and the other end of the grouting pipe passes through the inner housing 2 and is communicated to the grouting space; Control the grouting system 5 to inject lining slurry into the grouting space, specifically including the steps of: controlling the grouting pump 502 to pump out the lining slurry in the slurry bucket 501 and transporting it to the grouting space through the grouting pipe.

[0019] Specifically, in this embodiment, the grouting pipe includes a main pipe 503 and a plurality of branch pipes 504. One end of the main pipe 503 is connected to the grouting pump 502, and the other end of the main pipe 503 is introduced into the inner shell 2 and extends into the main shell 1. The plurality of branch pipes 504 are arranged circumferentially along the main shell 1, and one end of each of the plurality of branch pipes 504 is connected to the second end of the main pipe 503. The other ends of the plurality of branch pipes 504 all extend inward from the inner wall of the main shell 1 towards the inner shell 2 to insert into the grouting space; the slurry bucket 501 and the grouting pump 502 can be placed at the bottom of the already formed lining 7 and do not move with the shield machine. 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; The tail end of the inner shell 2 extends out of the main shell 1 and forms an extension section for temporarily supporting the lining slurry so that the lining slurry forms the lining 7 after solidification. Further, the inner shell 2 includes a secondary shell 202 and an annular plate 201. The annular plate 201 is fixed to the inner side of the tail end of the main shell 1. The first end of the secondary shell 202 is fixed to the annular plate 201 so that the first end of the secondary shell 202, the annular plate 201, and the tail end of the main shell 1 enclose a supplementary grouting space 203 communicating with the grouting space. The second end of the secondary shell 202 extends out of the main shell 1 and forms a grouting space with the inner wall of the tunnel formed by tunneling. The second ends of the plurality of branch pipes 504 all pass through the annular plate 201 and communicate with the supplementary grouting space; By adopting the above design, control the grouting pump 502 to extract the lining slurry in the slurry bucket 501, transport it through the main pipe 503 to the plurality of branch pipes 504, and then inject it into the grouting space through the plurality of branch pipes 504 to form the lining 7 for supporting the tunnel; the provided supplementary grouting space 203 can supply the lining slurry output by the branch pipes 504 to the grouting space in a timely manner, and hiding the output ports of the branch pipes 504 in the supplementary grouting space 203 can also prevent blockage by falling 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 that when the secondary shell 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.

[0020] Among them, the propulsion system includes a jacking device 3 and a jacking component 4. The jacking device 3 includes a propulsion oil cylinder 301 fixed to the inner wall of the main shell 1. The jacking component 4 includes a support ring 401 connected to the output end of the propulsion oil cylinder 301 and a plurality of support oil cylinders 402 arranged along the outer peripheral surface of the support ring 401; Control the propulsion system to drive the main shell forward, specifically including the steps of: Control the output ends of multiple support cylinders 402 to extend and abut against the inner wall of the formed lining 7, so as to fix the jacking assembly 4 to the inner wall of the lining 7; Control the propulsion cylinder 301 to push the support ring 401, and utilize the fixed jacking assembly 4 to provide a reaction force to realize the forward movement of the main housing 1.

[0021] Specifically, in this embodiment, the telescopic direction of the propulsion cylinder 301 is along the axial direction of the inner housing 2, and the telescopic direction of the support cylinder 402 is along the radial direction of the inner housing 2.

[0022] Among them, when performing step S2, when the propulsion cylinder 301 is pushed to the maximum distance, the cutting mechanism 6 and the grouting system 5 are closed. First, control the output ends of multiple support cylinders 402 to retract and reset to separate the jacking assembly 4 from the inner wall of the lining 7, and then control the propulsion cylinder 301 to pull back the support ring 401 to pull the jacking assembly 4 back to its original position; Before performing step S3, repeat step S2 until the tunnel boring is completed.

[0023] By adopting the above design, the control method of this application reduces the process conversion time through synchronous operation, improves the construction efficiency, and shortens the construction period; timely support effectively controls the deformation of the excavation face, reduces the formation disturbance, and reduces the risk of ground settlement; synchronous operation can better cope with complex geological conditions such as soft, broken, 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.

[0024] 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 terms "include", "comprise" or any other variant thereof are 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.

[0025] The present invention has been described in detail above in conjunction with the embodiments of 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 operation method in which excavation and support can be controlled in parallel and synchronously, characterized in that: The following steps are involved: S1. Provide a shield machine, which includes a main shell, a cutting mechanism installed at the head end of the main shell, a propulsion system, an inner shell fixedly connected to the tail end of the main shell and having a diameter smaller than that of the main shell, and a grouting system; S2, starting the cutting mechanism to cut the stratum, synchronously controlling the propulsion system to drive the main shell forward to excavate a tunnel, and forming a grouting space between the outer wall of the inner shell and the inner wall of the tunnel; while forming the grouting space, controlling the grouting system to inject lining slurry into the grouting space to form a lining, and in the process of continuing to excavate, supporting the tunnel with the formed lining; S3. After tunnel excavation is completed, the cutting mechanism and propulsion system are first turned off, and then the grouting system is turned off.

2. The shield machine operation method with parallel and synchronous control of excavation and support as claimed in claim 1 is characterized in that: The grouting system comprises a slurry barrel, a grouting pump and a grouting pipe, wherein the grouting pump is connected to the slurry barrel, one end of the grouting pipe is connected to the grouting pump, and the other end of the grouting pipe passes through the inner shell and is connected to the grouting space; The controlling grouting system to inject lining slurry into the grouting space specifically comprises the steps of: controlling the grouting pump to extract the lining slurry in the slurry barrel and transporting it to the grouting space through the grouting pipe.

3. The shield machine operation method with parallel and synchronous control of excavation and support as claimed in claim 1 is characterized in that: The propulsion system includes a propulsion device and a propulsion support assembly, wherein the propulsion device includes a propulsion cylinder fixed to the inner wall of the main housing, and the propulsion 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 circumference of the support ring; The control propulsion system drives the main housing forward, specifically comprising the steps of: Control the output ends of multiple supporting oil cylinders to extend and support against the formed inner wall of the lining, so as to achieve the fixation of the top support assembly and the inner wall of the lining; The propulsion cylinder is controlled to push the support ring, and a fixed support assembly is used to provide a reaction force to push the main casing forward.

4. The shield machine operation method with parallel and synchronous control of excavation and support as claimed in claim 3 is characterized in that: When executing step S2, when the propulsion cylinder is pushed to the maximum distance, the cutting mechanism and the grouting system are closed, and the output ends of the plurality of support cylinders are first controlled to retract and reset to separate the top support assembly from the inner wall of the lining, and then the propulsion cylinder is controlled to pull back the support ring to pull the top support assembly back to its original position; Before executing step S3, step S2 is repeated until the tunnel excavation is completed.

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