Construction method for extending the pipeline of shield machine outside the tunnel and construction method for tunnel excavation

Abstract

The invention relates to a tunnel outer shield machine pipeline extension construction method and a tunnel excavation construction method. The tunnel excavation construction method comprises a tunnel outer shield machine pipeline extension construction method, and the tunnel outer shield machine pipeline extension construction method comprises arranging a long hose-type pipeline extension device at a tunnel entrance, so that a slurry inlet pipe and a slurry discharge pipe are arranged in parallel in the vertical direction; an in-tunnel pipeline transmission device is arranged in the tunnel, the in-tunnel pipeline transmission device comprises a sliding track and a suspension trolley movably installed on the sliding track, the suspension trolley clamps the slurry inlet and discharge pipes on the in-tunnel pipeline transmission device through a pipe clamp and the slurry inlet and discharge pipes are arranged in parallel in the vertical direction; during the tunnel excavation construction, the shield machine drives the slurry inlet and discharge pipes to extend into the tunnel, and performs pipeline connection operation after extending a distance of a pipe replacement stroke; the pipeline adopts an upper and lower double-layer arrangement, the long inlet and discharge hoses move independently without interfering with each other, and the inlet and discharge pipes can be flexibly arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of shield machine excavation, in particular to shield machine pipeline extension construction, and specifically to a tunnel outer shield machine pipeline extension construction method and a tunnel excavation construction method. Background Art

[0002] With the rapid development of shield machine manufacturing level and shield construction technology, more and more tunnel projects are constructed by shield machines. Slurry shield is a type of shield machine. It has the advantages of fast excavation speed, high precision of surface settlement control and little interference with the soil around the excavation surface. It is widely used in the excavation of tunnels with high water pressure, shallow overburden and unstable strata. The mud pipeline is the only way for the slurry shield to discharge slag. The circulation pipeline is formed by the slurry inlet pipe and the slurry discharge pipe. Since the mud pipeline requires good wear resistance and strong pressure bearing capacity, the mud pipeline is mostly made of steel seamless steel pipe. The mud pipeline is divided into two parts, one part is fixedly installed on the shield machine, and the other part is fixedly installed on the inner wall of the tunnel segment. The two parts of the pipeline need to be connected to form a complete mud circulation system. However, the shield machine is constantly moving forward, and the mud pipe installed on the inner wall of the tunnel segment cannot follow the shield machine. This requires the design of a mud pipeline extension device between the shield machine mud pipeline and the tunnel mud pipeline.

[0003] For example, a slurry pipeline extension device and extension method for a slurry shield is disclosed in a patent application document with application publication number CN110985036A. The pipeline extension device introduced therein is the method currently adopted by most shield machines, that is, a pipeline extension device is arranged on the shield machine trailer in the tunnel. The pipeline extension device is an important component to ensure the slag discharge of the slurry shield. The pipeline extension device is used to add an extension pipeline between the trailer mud pipe and the tunnel mud pipe.

[0004] Due to space limitations in the tunnel, pipeline extension usually requires the space of 1-2 trailers, and since the length of each pipeline extension is mostly 6-10 meters, in order to meet the pipe replacement schedule, the trailer for arranging the pipeline extension device must be at least 9 meters long. The trailer where the pipeline extension device is located is generally the longest trailer in the shield machine. A longer trailer is not conducive to the excavation of a small-turn shield machine, and will also cause the entire shield machine to be too long, which is not conducive to the start of the shield machine.

[0005] In view of the above-mentioned whole machine starting problem, there is a split starting solution in the prior art, such as a mud pipe extension system disclosed in a patent application document with application publication number CN112576266A, which includes a slurry feed pipeline and a slurry discharge pipeline connected between the main mud pipeline of the tunnel boring machine main engine and the mud station. The slurry feed pipeline and the slurry discharge pipeline both include an extension hose arranged in the starting well and connected to the mud station. The extension hose is folded in the starting well before extension. The extension hose is connected to the main mud pipeline through a traveling mud hard pipe. The traveling mud hard pipe is connected to a traveling unit. A guide bracket supporting the traveling unit is arranged in the starting guide tunnel. After the extension hose is extended by the length of an extension hard pipe, the traveling mud hard pipe and the extension hose are disconnected, the extension hose is retracted, and the traveling mud hard pipe is connected to the extension hard pipe. By arranging the extension hose in the starting well to realize pipeline extension, the tunnel boring machine does not need to be provided with a trailer for supporting the extension hose, which facilitates the split starting of the tunnel boring machine with a mud pipeline system.

[0006] Although the above-mentioned mud pipe extension system can shorten the length of the shield machine trailer, in actual use, the slurry inlet pipe and the slurry discharge pipe of the extension hose are arranged in parallel in the horizontal direction. When the shield machine drives the two long hoses to extend during excavation, the movements of the two long hoses are likely to interfere with each other. At the same time, the slurry inlet pipe and the slurry discharge pipe in the tunnel are also arranged in parallel in the horizontal direction. In order to facilitate the docking with the extension hose and the connection of new pipes, a large gap needs to be reserved between the slurry inlet pipe and the slurry discharge pipe, which will take up more space in the tunnel; moreover, due to the limited space at the bottom of the tunnel, the method of supporting the slurry inlet pipe and the slurry discharge pipe by laying a guide bracket at the bottom of the tunnel is not flexible and convenient enough. Summary of the invention

[0007] The purpose of the present invention is to provide a tunnel outer shield machine pipeline extension construction method to solve the problem that the movement of the two long hoses of the extension hose of the current pipeline extension system is prone to mutual interference; the purpose of the present invention is also to provide a tunnel excavation construction method to solve the problem that the movement of the two long hoses of the extension hose of the current pipeline extension system is prone to mutual interference.

[0008] The technical solution of the tunnel outer shield machine pipeline extension construction method of the present invention is:

[0009] The tunnel boring machine pipeline extension construction method comprises the following steps: (1) arranging a long hose-type pipeline extension device at the tunnel entrance; (2) setting a tunnel pipeline transmission device in the tunnel; (3) connecting the slurry inlet and outlet pipelines; (4) performing tunnel boring construction; during the tunnel boring construction, the slurry inlet and outlet pipelines on the tunnel boring machine trailer are linked with the slurry inlet and outlet pipelines on the tunnel pipeline transmission device and the slurry inlet and outlet pipelines of the pipeline extension device, driving the slurry inlet and outlet pipelines to extend into the tunnel; (5) after the slurry inlet and outlet pipelines are extended into the tunnel by a distance corresponding to a pipe replacement stroke, the pipeline splicing operation is performed, and after the pipeline splicing operation is completed, the tunnel boring construction is continued until the slurry inlet and outlet pipelines are extended into the tunnel by a distance corresponding to a pipe replacement stroke, and the pipeline splicing operation is performed again, and the tunnel boring construction is continued. The pipeline extension construction is realized through the secondary cycle; when arranging the long hose type pipeline extension device, the slurry inlet and outlet pipes of the pipeline extension device are arranged side by side in the vertical direction, and the long hose is arranged in a bent manner on the horizontal platform at the tunnel entrance; when arranging the pipeline conveying device in the tunnel, the pipeline conveying device in the tunnel includes a sliding track and a hanging trolley movably installed on the sliding track, and the hanging trolley clamps the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel through the pipe clamp and arranges the slurry inlet and outlet pipes of the slurry inlet and outlet pipes side by side in the vertical direction; during the shield machine excavation construction, the hanging trolley moves synchronously with the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel along the sliding track to realize the extension of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel into the tunnel.

[0010] Beneficial effects: by arranging the pipeline extension device at the tunnel entrance and making the slurry inlet and outlet pipelines in the tunnel advance with the excavation of the shield machine, the slurry inlet and outlet pipelines can be disconnected at the tunnel entrance to connect to the new connecting pipe section, and the pipeline extension of the shield machine can be realized outside the tunnel; the slurry inlet and outlet pipes of the pipeline extension device and the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel are arranged side by side in the upper and lower directions, so that the upper and lower double-layer arrangement is adopted, and the long slurry inlet and outlet hoses move independently without interfering with each other, thereby ensuring reliable use, and at the same time, the horizontal arrangement space of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be reduced; by suspending the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel on a suspension trolley for movement, the upper and lower arrangement of the slurry inlet and outlet pipes is convenient, and the slurry inlet and outlet pipes can be arranged more flexibly on the inner wall of the tunnel through the suspension installation method.

[0011] Furthermore, when laying the pipeline conveying device in the tunnel, the sliding track is laid on the side wall of the tunnel.

[0012] Beneficial effects: Sliding tracks are arranged on the side walls of the tunnel to facilitate construction and at the same time, to make full use of the layout space in the tunnel.

[0013] Furthermore, during the pipeline splicing operation, the pipeline splicing operation includes splicing the pipeline conveying device in the tunnel and splicing the slurry inlet and outlet pipelines. Splicing the slurry inlet and outlet pipelines includes disconnecting the slurry inlet and outlet pipes on the pipeline extension device from the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel, retracting the slurry inlet and outlet pipes on the pipeline extension device in the opposite direction of the excavation direction, connecting a splicing pipe section in series between the slurry inlet and outlet pipes on the pipeline extension device and the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel, installing a new suspension trolley on the splicing pipe section, and during excavation construction, as the slurry inlet and outlet pipelines extend into the tunnel, the suspension trolley is installed on the sliding guide rail.

[0014] Beneficial effect: By adding a new suspension trolley to support the newly connected connecting pipe section, it is ensured that the slurry inlet and outlet pipelines can move and extend smoothly into the tunnel.

[0015] Furthermore, at least two new suspension trolleys are installed on each pipe-connecting section, and the suspension trolleys are evenly spaced apart on the pipe-connecting section.

[0016] Beneficial effect: The force on the connecting pipe section is evenly distributed, ensuring reliable suspension support for the connecting pipe section.

[0017] Furthermore, the pipe clamp is connected to the body of the suspension trolley through an adjustable structure, so that after the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel are connected to the suspension trolley, the suspension height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be adjusted.

[0018] Beneficial effect: The suspension trolley has an adjustable structure, so that the suspension height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be adjusted, which is convenient for adjusting the position of the connecting pipe section during the pipeline connecting process.

[0019] Furthermore, the suspension trolley includes a manual hoist, and the manual hoist constitutes the adjustable structure.

[0020] Beneficial effects: The manual hoist is an existing mature technology. The manual hoist is used to achieve the adjustability of the slurry inlet and outlet pipes. It has a reliable structure and is easy to use.

[0021] Furthermore, the pipe clamp is an "8"-shaped pipe clamp, which includes two pipe clamp parts that are detachably fixed together, and each pipe clamp part is provided with two clamping grooves arranged vertically, so that after the two pipe clamp parts are butt-joined, the clamping grooves on the two pipe clamp parts are matched with each other so that the "8"-shaped pipe clamp has two clamping holes arranged vertically, and the hanging trolley clamps the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel through the pipe clamp, so that the slurry inlet pipe and the slurry discharge pipe are respectively inserted into the two clamping holes of the pipe clamp and clamped.

[0022] Beneficial effect: The "8"-shaped pipe clamp has a simple structure and can form a good fit with the pipe to ensure a reliable clamping.

[0023] Furthermore, the sliding track includes a track beam bracket and a track beam, the track beam is formed by an I-beam, and the suspension trolley is movably installed on the track beam.

[0024] Beneficial effects: The track is formed directly using I-beams, which is convenient for making the sliding track. At the same time, the I-beams have good load-bearing performance and are conducive to reliable use.

[0025] Furthermore, the upper flange of the track beam is fixed on the track beam bracket, and the suspension trolley is installed on the lower flange of the track beam.

[0026] Beneficial effect: The upper flange of the I-beam is convenient for forming a good fixation with the track beam bracket. At the same time, the suspension trolley is installed on the lower flange of the I-beam, which is conducive to uniform force and smooth movement.

[0027] The technical solution of the tunnel excavation construction method of the present invention is:

[0028] The tunnel excavation construction method includes a tunnel outside shield machine pipeline extension construction method, and the tunnel outside shield machine pipeline extension construction method includes the following steps: (1) arranging a long hose type pipeline extension device at the tunnel entrance; (2) setting a tunnel pipeline transmission device in the tunnel; (3) connecting the slurry inlet and outlet pipelines; (4) tunnel excavation construction by the shield machine; during the tunnel excavation construction process, the slurry inlet and outlet pipes on the shield machine trailer are linked to the slurry inlet and outlet pipes on the tunnel pipeline transmission device and the slurry inlet and outlet pipes of the pipeline extension device, driving the slurry inlet and outlet pipelines to extend into the tunnel; (5) after the slurry inlet and outlet pipelines are extended into the tunnel by a pipe replacement stroke distance, the pipeline connection operation is performed, and after the pipeline connection operation is completed, the tunnel excavation construction is continued until the slurry inlet and outlet pipelines are extended into the tunnel by a pipe replacement stroke distance. , and the pipeline connection operation is carried out again, and the pipeline extension construction is realized in sequence and in a cycle; when arranging the long hose type pipeline extension device, the slurry inlet pipe and the slurry discharge pipe of the pipeline extension device are arranged side by side in the up and down directions, and the long hose is arranged in a bent manner on the horizontal platform at the tunnel entrance; when arranging the pipeline conveying device in the tunnel, the pipeline conveying device in the tunnel includes a sliding track and a hanging trolley movably installed on the sliding track, and the hanging trolley clamps the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel through a pipe clamp and arranges the slurry inlet and discharge pipes of the slurry inlet and discharge pipes side by side in the up and down directions; during the shield machine excavation construction, the hanging trolley moves synchronously with the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel along the sliding track to realize the extension of the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel into the tunnel.

[0029] Beneficial effects: by arranging the pipeline extension device at the tunnel entrance and making the slurry inlet and outlet pipelines in the tunnel advance with the excavation of the shield machine, the slurry inlet and outlet pipelines can be disconnected at the tunnel entrance to connect to the new connecting pipe section, and the pipeline extension of the shield machine can be realized outside the tunnel; the slurry inlet and outlet pipes of the pipeline extension device and the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel are arranged side by side in the upper and lower directions, so that the upper and lower double-layer arrangement is adopted, and the long slurry inlet and outlet hoses move independently without interfering with each other, thereby ensuring reliable use, and at the same time, the horizontal arrangement space of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be reduced; by suspending the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel on a suspension trolley for movement, the upper and lower arrangement of the slurry inlet and outlet pipes is convenient, and the slurry inlet and outlet pipes can be arranged more flexibly on the inner wall of the tunnel through the suspension installation method.

[0030] Furthermore, when laying the pipeline conveying device in the tunnel, the sliding track is laid on the side wall of the tunnel.

[0031] Beneficial effects: Sliding tracks are arranged on the side walls of the tunnel to facilitate construction and at the same time, to make full use of the layout space in the tunnel.

[0032] Furthermore, during the pipeline splicing operation, the pipeline splicing operation includes splicing the pipeline conveying device in the tunnel and splicing the slurry inlet and outlet pipelines. Splicing the slurry inlet and outlet pipelines includes disconnecting the slurry inlet and outlet pipes on the pipeline extension device from the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel, retracting the slurry inlet and outlet pipes on the pipeline extension device in the opposite direction of the excavation direction, connecting a splicing pipe section in series between the slurry inlet and outlet pipes on the pipeline extension device and the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel, installing a new suspension trolley on the splicing pipe section, and during excavation construction, as the slurry inlet and outlet pipelines extend into the tunnel, the suspension trolley is installed on the sliding guide rail.

[0033] Beneficial effect: By adding a new suspension trolley to support the newly connected connecting pipe section, it is ensured that the slurry inlet and outlet pipelines can move and extend smoothly into the tunnel.

[0034] Furthermore, at least two new suspension trolleys are installed on each pipe-connecting section, and the suspension trolleys are evenly spaced apart on the pipe-connecting section.

[0035] Beneficial effect: The force on the connecting pipe section is evenly distributed, ensuring reliable suspension support for the connecting pipe section.

[0036] Furthermore, the pipe clamp is connected to the body of the suspension trolley through an adjustable structure, so that after the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel are connected to the suspension trolley, the suspension height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be adjusted.

[0037] Beneficial effects: The suspension trolley has an adjustable structure, so that the suspension height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel can be adjusted, which is convenient for adjusting the position of the connecting pipe section during the pipeline connecting process.

[0038] Furthermore, the suspension trolley includes a manual hoist, and the manual hoist constitutes the adjustable structure.

[0039] Beneficial effects: The manual hoist is an existing mature technology. The manual hoist is used to achieve the adjustability of the slurry inlet and outlet pipes. It has a reliable structure and is easy to use.

[0040] Furthermore, the pipe clamp is an "8"-shaped pipe clamp, which includes two pipe clamp parts that are detachably fixed together, and each pipe clamp part is provided with two clamping grooves arranged vertically, so that after the two pipe clamp parts are butt-joined, the clamping grooves on the two pipe clamp parts are matched with each other so that the "8"-shaped pipe clamp has two clamping holes arranged vertically, and the hanging trolley clamps the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel through the pipe clamp, so that the slurry inlet pipe and the slurry discharge pipe are respectively inserted into the two clamping holes of the pipe clamp and clamped.

[0041] Beneficial effect: The "8"-shaped pipe clamp has a simple structure and can form a good fit with the pipe to ensure a reliable clamping.

[0042] Furthermore, the sliding track includes a track beam bracket and a track beam, the track beam is formed by an I-beam, and the suspension trolley is movably installed on the track beam.

[0043] Beneficial effects: The track is formed directly using I-beams, which is convenient for making the sliding track. At the same time, the I-beams have good load-bearing performance and are conducive to reliable use.

[0044] Furthermore, the upper flange of the track beam is fixed on the track beam bracket, and the suspension trolley is installed on the lower flange of the track beam.

[0045] Beneficial effect: The upper flange of the I-beam is convenient for forming a good fixation with the track beam bracket. At the same time, the suspension trolley is installed on the lower flange of the I-beam, which is conducive to uniform force and smooth movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the shield machine of the present invention driving the slurry inlet and outlet pipelines to advance forward;

[0047] Figure 2 for Figure 1 AA section view;

[0048] Figure 3 for Figure 1 Partial view of BB section;

[0049] Figure 4It is a schematic diagram of the pipeline connection operation in the tunnel outer shield machine pipeline extension construction method of the present invention;

[0050] Figure 5 It is a schematic diagram of setting an expansion joint and a gate valve in the tunnel outer shield machine pipeline extension construction method of the present invention;

[0051] Figure 6 It is a structural schematic diagram of the pipeline extension device in the tunnel outer shield machine pipeline extension construction method of the present invention.

[0052] In the figure: 1. Tunnel segment; 2. Track beam support; 3. Track beam; 4. Manual hoist; 5. Slurry inlet and outlet pipes in the tunnel; 6. Trailer; 7. Slurry inlet and outlet pipes of trailer; 8. Pipeline clamp; 9. Pipeline extension device; 10. Slurry inlet and outlet pipes of pipeline extension device; 11. Continued pipe section; 12. Gate valve. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0055] It should be noted that the terms that may appear in the specific embodiments of the present invention, such as 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 such actual relationship or order between these entities or operations. Moreover, the terms that may appear, such as "include", "comprise" or any other variants thereof, are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the possible statements "including one...", etc., do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The present invention is further described in detail below in conjunction with embodiments.

[0059] Embodiment 1 of the tunnel excavation construction method of the present invention:

[0060] like Figure 1 , Figure 2 , Figure 3 As shown, the tunnel excavation construction method includes a tunnel outer shield machine pipeline extension construction method, and the tunnel outer shield machine pipeline extension construction method includes the steps of:

[0061] Arrange a pipeline extension device 9 at the tunnel entrance; Figure 1 The middle dotted line frame indicates the tunnel entrance position. The pipeline extension device 9 is a long hose type pipeline extension device, which has a pipeline extension device slurry inlet and outlet pipe 10. The pipeline extension device slurry inlet and outlet pipe 10 includes a slurry inlet pipe and a slurry outlet pipe arranged in parallel up and down. The slurry inlet and outlet pipes of the pipeline extension device 9 adopt a long hose, which is bent and arranged on a horizontal platform at the tunnel entrance. The slurry inlet and outlet pipes adopt an upper and lower double-layer arrangement form.

[0062] An in-tunnel pipeline conveying device is arranged in the tunnel; the in-tunnel pipeline conveying device comprises a sliding track and a suspension trolley movably mounted on the sliding track, the sliding track is arranged on the side wall of the tunnel, the sliding track comprises a track beam support 2 and a track beam 3, the track beam support 2 is arranged on the tunnel segment 1, the track beam 3 is fixed on the track beam support 2, and the suspension trolley comprises a manual hoist 4; the track beam 3 is formed by an I-beam, the upper flange of the track beam 3 is fixed on the track beam support 2, the manual hoist 4 is suspended on the body of the suspension trolley, and the body of the suspension trolley is suspended on the lower flange of the track beam 3 and can move;

[0063] Arrange the slurry inlet and outlet pipelines; the slurry inlet and outlet pipelines include the trailer slurry inlet and outlet pipes 7 arranged on the trailer 6 of the shield machine, the tunnel slurry inlet and outlet pipes 5 arranged on the tunnel pipeline transmission device, and the pipeline extension device slurry inlet and outlet pipes 10 on the pipeline extension device 9, and in order to ensure that the pipeline is not subject to transition constraints and to facilitate maintenance in the tunnel, expansion joints and gate valves 12 are arranged on the pipeline at set intervals, and the gate valve 12 constitutes a valve;

[0064] The slurry inlet and outlet pipes 5 in the tunnel are hung on the manual hoist 4 through the pipeline pipe clamp 8; the pipeline pipe clamp 8 is an intermediate device for hanging the slurry inlet and outlet pipes 5 in the tunnel on the manual hoist 4, and the manual hoist constitutes an adjustable structure, so that the hanging height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel is adjustable, and the slurry inlet pipe and the slurry outlet pipe of the slurry inlet and outlet pipes 5 in the tunnel are arranged in parallel up and down, and the pipeline pipe clamp 8 is an "8"-shaped pipe clamp, and the "8"-shaped pipe clamp includes two pipe clamp splits that are detachably fixedly connected together, and each pipe clamp split is provided with two clamping grooves arranged up and down, so that after the two pipe clamp splits are butt-jointed, the clamping grooves on the two pipe clamp splits are mutually matched so that the "8"-shaped pipe clamp has two clamping holes arranged up and down, so that the slurry inlet pipe and the slurry outlet pipe of the slurry inlet and outlet pipes 5 in the tunnel can be respectively penetrated and clamped;

[0065] Connect the slurry inlet and outlet pipeline; the slurry inlet and outlet extension pipe in the tunnel is a pipeline that connects the trailer slurry inlet and outlet pipe 7 with the slurry inlet and outlet pipe 10 of the pipeline extension device;

[0066] Shield machine excavation construction; During the excavation construction process, the shield machine excavation drives the trailer 6 forward, and the manual hoist 4 drives the tunnel inlet and outlet pipe 5 to slide on the track beam 3 when the trailer 6 follows the shield machine excavation, and the trailer inlet and outlet pipe 7 links the tunnel inlet and outlet pipe and the pipeline extension device inlet and outlet pipe 10, the trailer inlet and outlet pipe 7 and the tunnel inlet and outlet pipe 5 move forward, and the pipeline extension device inlet and outlet pipe 10 is unfolded, so that the inlet and outlet pipe is extended into the tunnel;

[0067] like Figure 4 , Figure 5 , Figure 6 As shown, when the shield machine excavates a pipe replacement stroke distance L, the pipeline extension device feed and discharge pipe 10 will also advance a pipe replacement stroke distance, and the pipeline connection operation is performed at this time. The pipeline connection operation includes connecting the pipeline transmission device in the tunnel and connecting the feed and discharge pipelines;

[0068] The pipeline conveying device in the connecting tunnel includes laying a new connecting track on the path of the shield machine trailer 6 and arranging a pipeline clamp 8 and a manual hoist 4 on the connecting pipe section 11, arranging two pipeline clamps 8 and two manual hoists 4 on the connecting pipe section 11, and arranging each pipeline clamp 8 and each manual hoist 4 at even intervals;

[0069] There is a distance between the trailer 6 and the head of the shield machine, so that the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel and the connection point of the slurry inlet and outlet pipes on the trailer 6 are a distance away from the head. Based on this distance, a sliding track is laid in advance on the inner wall of the tunnel. Every time the shield machine excavates a pipe replacement stroke, a sliding track is laid in advance at the front end. In this way, the trailer 6 drives the slurry inlet and outlet pipes forward, and then drives the suspension trolley to move forward. There is always a sliding track to keep the slurry inlet and outlet pipes moving forward stably;

[0070] The specific steps of connecting the slurry inlet and discharge pipeline include disconnecting the slurry inlet and discharge pipe 10 of the pipeline extension device from the slurry inlet and discharge pipe on the pipeline conveying device in the tunnel, and after disconnecting the connection between the slurry inlet and discharge pipe 10 of the pipeline extension device and the slurry inlet and discharge pipe 5 in the tunnel, rewinding the long hose connected to the slurry inlet and discharge pipe 10 of the pipeline extension device and returning the butt end of the slurry inlet and discharge pipe 10 of the pipeline extension device used to connect with the slurry inlet and discharge pipe in the tunnel to the initial position, so that there is a distance of one section of pipeline between the slurry inlet and discharge pipe 10 of the pipeline extension device and the slurry inlet and discharge pipe 5 in the tunnel, and then connecting the connecting pipe section 11 in series between the slurry inlet and discharge pipe 10 of the pipeline extension device and the slurry inlet and discharge pipe 5 in the tunnel to realize the extension of the slurry inlet and discharge pipeline;

[0071] After the pipeline connection operation is completed, the excavation construction continues. During the excavation construction, as the slurry inlet and outlet pipelines extend into the tunnel, the manual hoist 4 on the connected connecting pipe section 11 is hung on the track beam 3;

[0072] After the slurry inlet and discharge pipelines have been extended into the tunnel by a distance corresponding to the pipe replacement stroke, the pipeline reconnection operation is performed again, and the above steps can be repeated to continuously realize the construction of pipeline extension outside the tunnel; at the same time, each time the pipeline reconnection operation is performed, the slurry inlet and discharge pipes 5 in the tunnel and the slurry inlet and discharge pipes 10 of the pipeline extension device are disconnected, and an expansion joint is installed at the end of the slurry inlet and discharge pipes 5 in the tunnel; and a gate valve 12 is set near the slurry discharge pipeline every 50-100 meters.

[0073] By extending the pipeline of the shield machine outside the tunnel, the pipeline extension device does not advance in the tunnel together with the shield machine, and a trailer set up for arranging the pipeline extension device can be eliminated, thereby reducing the number of trailers, shortening the length of the shield machine trailer, and thus shortening the length of the entire shield machine, which is beneficial to small-turn construction conditions, can shorten the length of the starting shaft, and save construction costs; at the same time, the pipeline material does not need to enter the tunnel, and the shield machine pipeline can be extended at the tunnel entrance, thereby improving construction efficiency; and because the pipeline extension device is arranged at the inlet outside the tunnel, it is not restricted by the space in the tunnel, and there is no need to consider the tunnel construction conditions. The structural form of the pipeline extension device can be independently designed and can be reused on different shield machines with the same pipeline diameter, which is also convenient for construction and maintenance.

[0074] The slurry inlet pipe and the slurry discharge pipe of the pipeline extension device are arranged side by side in the vertical direction to form an upper and lower double-layer arrangement. The long slurry inlet and discharge hoses move independently without interfering with each other, thereby ensuring reliable use. At the same time, the slurry inlet pipe and the slurry discharge pipe on the pipeline conveying device in the tunnel are arranged side by side in the vertical direction, which can reduce the horizontal arrangement space of the slurry inlet and the slurry discharge pipe on the pipeline conveying device in the tunnel; by suspending the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel on a hanging trolley for movement, it is convenient to arrange the slurry inlet and discharge pipes up and down, and the slurry inlet and discharge pipes can be arranged more flexibly on the inner wall of the tunnel through the hanging installation method, and the slurry inlet and discharge pipes can be arranged in the relatively ample space on the side of the tunnel.

[0075] Embodiment 2 of the tunnel excavation construction method of the present invention:

[0076] The difference between this embodiment and embodiment 1 is that in embodiment 1, the slurry inlet and outlet pipelines are hung on the side wall of the tunnel, while in this embodiment, the slurry inlet and outlet pipelines are hung on the top wall of the tunnel.

[0077] Embodiment 3 of the tunnel excavation construction method of the present invention:

[0078] The difference between this embodiment and the above-mentioned embodiment is that in embodiment 1, the suspension trolley includes a manual hoist, and the manual hoist is suspended on the body of the suspension trolley. In this embodiment, the suspension trolley includes a rigid rod of fixed length, one end of which is connected to the body of the suspension trolley, and the other end is connected to the pipe clamp, and the suspension height of the slurry inlet pipe and the slurry discharge pipe cannot be adjusted. In other embodiments, the pipe clamp can also be connected to the body of the suspension trolley through a steel wire rope of a certain length.

[0079] Embodiment 4 of the tunnel excavation construction method of the present invention:

[0080] The difference between this embodiment and the above-mentioned embodiment is that in embodiment 1, two suspension trolleys are installed on each pipe-connecting section. In this embodiment, only one suspension trolley is installed on each pipe-connecting section. In other embodiments, more than three suspension trolleys may be installed on each pipe-connecting section.

[0081] Embodiment 5 of the tunnel excavation construction method of the present invention:

[0082] The difference between this embodiment and the above embodiment is that in embodiment 1, the manual hoist constitutes an adjustable structure. In this embodiment, the suspension trolley includes an adjustment plate and a connection seat, the adjustment plate is fixed on the body of the suspension trolley, a plurality of connection holes are opened on the adjustment plate in the up-down direction, the pipe clamp is fixed on the connection seat, the connection seat and the adjustment plate are bolted and connected through the connection holes, and the connection position is changed by connecting different connection holes, thereby forming an adjustable structure that makes the pipeline height adjustable.

[0083] Embodiment 6 of the tunnel excavation construction method of the present invention:

[0084] The difference between this embodiment and the above embodiment is that in embodiment 1, the track beam is formed by I-beams, and the suspension trolley is installed on the lower flange of the track beam. In this embodiment, the track beam is a square steel beam, and a T-shaped slide groove is provided on one side of the square steel beam. The pipe clamp of the suspension trolley is fixed on the slide seat, and the slide seat is provided with a T-shaped slider adapted to the T-shaped slide groove, and the T-shaped block extends into the T-shaped slide groove, so that the suspension trolley can be moved and installed on the track beam.

[0085] Embodiment of the tunnel outer shield machine pipeline extension construction method of the present invention:

[0086] The tunnel outer shield machine pipeline extension construction method in this embodiment is the same as the tunnel outer shield machine pipeline extension construction method in any of the above-mentioned embodiments 1-6 of the tunnel excavation construction method, and will not be repeated here.

[0087] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. The tunnel outer shield machine pipeline extension construction method includes the following steps: (1) Arrange a long hose-type pipeline extension device at the tunnel entrance; (2) Set up a tunnel pipeline transmission device in the tunnel; (3) Connect the slurry inlet and outlet pipelines; (4) Perform tunneling construction with a shield machine; During the tunneling construction, the slurry inlet and outlet pipes on the shield machine trailer are linked to the slurry inlet and outlet pipes on the tunnel pipeline transmission device and the slurry inlet and outlet pipes of the pipeline extension device, driving the slurry inlet and outlet pipelines to extend into the tunnel; (5) After the slurry inlet and outlet pipelines are extended into the tunnel by a pipe replacement stroke, the pipeline splicing operation is performed. After the pipeline splicing operation is completed, the tunneling construction is continued until the slurry inlet and outlet pipelines are extended into the tunnel by a pipe replacement stroke, and the pipeline splicing operation is performed again. The pipeline extension construction is realized in a cycle. The pipeline splicing operation includes splicing the tunnel pipeline transmission device and splicing the pipeline transmission device. Slurry inlet and outlet pipelines; characterized in that, when a long hose-type pipeline extension device is arranged, the slurry inlet pipe and the slurry outlet pipe of the pipeline extension device are arranged side by side in the vertical direction, and the long hose is arranged in a bent manner on a horizontal platform at the tunnel entrance; when a pipeline conveying device in the tunnel is arranged, the pipeline conveying device in the tunnel includes a sliding track and a hanging trolley movably installed on the sliding track, the sliding track is arranged on the side wall of the tunnel, the hanging trolley clamps the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel through a pipe clamp and arranges the slurry inlet and outlet pipes of the slurry inlet and outlet pipes side by side in the vertical direction; during the tunneling construction of the shield machine, the hanging trolley moves synchronously with the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel along the sliding track to extend the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel into the tunnel.

2. The tunnel outer shield machine pipeline extension construction method according to claim 1 is characterized in that: During the pipeline connecting operation, connecting the slurry inlet and outlet pipes includes disconnecting the slurry inlet and outlet pipes on the pipeline extension device from the slurry inlet and outlet pipes on the pipeline transmission device in the tunnel, retracting the slurry inlet and outlet pipes on the pipeline extension device away from the excavation direction, connecting the connecting pipe section in series between the slurry inlet and outlet pipes on the pipeline extension device and the slurry inlet and outlet pipes on the pipeline transmission device in the tunnel, and installing a new suspension trolley on the connecting pipe section; during excavation construction, as the slurry inlet and outlet pipes extend into the tunnel, the suspension trolley is installed on the sliding guide rail.

3. The tunnel outer shield machine pipeline extension construction method according to claim 2 is characterized in that: At least two new suspension trolleys are installed on each pipe connecting section, and the suspension trolleys are evenly spaced on the pipe connecting section.

4. The tunnel outer shield machine pipeline extension construction method according to claim 2 is characterized in that: The pipe clamp is connected to the body of the suspension trolley through an adjustable structure, so that after the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel are connected to the suspension trolley, the adjustable structure makes the suspension height of the slurry inlet and outlet pipes on the pipeline conveying device in the tunnel adjustable.

5. The tunnel outer shield machine pipeline extension construction method according to claim 4 is characterized in that: The suspension trolley comprises a manual hoist, which constitutes the adjustable structure.

6. The tunnel outer shield machine pipeline extension construction method according to any one of claims 1 to 5, characterized in that: The pipe clamp is an "8"-shaped pipe clamp, which includes two pipe clamp parts that are detachably fixed together, and each pipe clamp part is provided with two clamping grooves arranged up and down, so that after the two pipe clamp parts are butt-jointed, the clamping grooves on the two pipe clamp parts are matched with each other so that the "8"-shaped pipe clamp has two clamping holes arranged up and down, and when the hanging trolley clamps the slurry inlet and discharge pipes on the pipeline conveying device in the tunnel through the pipe clamp, the slurry inlet pipe and the slurry discharge pipe are respectively inserted into the two clamping holes of the pipe clamp and clamped.

7. The tunnel outer shield machine pipeline extension construction method according to any one of claims 1 to 5, characterized in that: The sliding track comprises a track beam bracket and a track beam. The track beam is formed by an I-beam, and the suspension trolley is movably installed on the track beam.

8. The tunnel outer shield machine pipeline extension construction method according to claim 7 is characterized in that: The upper flange of the track beam is fixed on the track beam bracket, and the suspension trolley is installed on the lower flange of the track beam.

9. A tunneling construction method, including a tunnel boring machine pipeline extension construction method, characterized in that: The shield machine pipeline extension construction method is the tunnel outer shield machine pipeline extension construction method as described in any one of claims 1-8.

Images