Tunnel communication channel excavation equipment and method using flexible sleeve to initiate and receive

Abstract

The present invention discloses a tunnel communication channel excavation equipment and method with the aid of flexible sleeve initial reception, the excavation equipment includes an excavation device, a support trolley, a flexible initial sleeve system, a flexible receiving sleeve system and a moving device; the moving device is installed on the supporting trolley, on which the flexible initial sleeve system and the excavation device are supported, and is used to move the flexible initial sleeve system and the excavation device forward and backward along the starting axis direction of the communication channel; the flexible initial sleeve system and the flexible receiving sleeve system correspond to the main tunnel segments connected to the starting side and the receiving side; the method of the present invention mainly uses the adaptability of the flexible sleeve system to adjust the posture according to the initial reception of the tunnel boring machine, and at the same time facilitates the opening and connection with the main tunnel segment, and facilitates the removal of the cut portal segment. Compared with the existing similar equipment and methods, the present invention has the advantages of strong adaptability, high construction efficiency, and fully controllable construction risks.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction equipment, and in particular to a tunnel communication channel excavation equipment and method using a flexible sleeve to initiate and receive. Background Art

[0002] A tunnel connecting channel is a channel designed to connect two tunnels. If a tunnel has an unexpected problem, such as drainage or operation equipment stopping due to a malfunction, pedestrians can transfer to another tunnel through the connecting channel for quick escape and rescue. Taking the connecting channel of urban rail transit tunnels as an example, the "Subway Design Code" (GB50157-2013) stipulates that "two single-track section tunnels should have a connecting channel, and the distance between two adjacent connecting channels should not be greater than 600m". At present, the total mileage of subways planned to be built in many cities across the country is nearly 8,000km, and there are many connecting channels to be built according to the requirements of the subway design code.

[0003] Traditional methods for constructing communication channels mainly include freezing method and mining method. Many safety accidents occurred during the construction process. The industry began to explore purely mechanical shield method / pipe jacking method to construct communication channels.

[0004] At present, the purely mechanical shield method or jacking method for constructing communication channels is still in its infancy, and the relevant technology is not yet complete. There are the following defects: (1) The traditional rigid sleeve is not easy to install and connect due to the influence of the construction process, processing accuracy, various deformations, and measurement errors that cause docking mismatches, which affects work efficiency; (2) When the cutterhead cuts the main tunnel segment at the portal, the cutterhead directly cuts the main tunnel segment and is prone to deviate from the excavation axis. The cutting efficiency is low and the time is very long, causing large ground settlement in the receiving stage; (3) During the construction process, if an unexpected situation occurs at the portal, it is urgent to expose the working surface for processing. It is very difficult to disassemble the closed rigid sleeve after it is installed.

[0005] In summary, this field urgently needs a tunneling equipment and related construction technology that is more adaptable, easier to implement, safer, and more efficient. Summary of the invention

[0006] The purpose of the present invention is to provide a tunnel communication channel excavation equipment and method using a flexible sleeve to initiate and receive, so as to overcome the above-mentioned technical defects.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A tunnel communication channel excavation equipment that uses a flexible sleeve to initiate and receive, including an excavation device and a supporting trolley, the excavation device is provided with a cutter head with telescopic spokes, a cutting reinforcement ring, a propulsion connecting rod, and a cutting reinforcement ring propulsion cylinder, and is characterized in that it also includes a flexible starting sleeve system, a flexible receiving sleeve system and a moving device; the moving device is installed on the supporting trolley, supporting the flexible starting sleeve system and the excavation device wrapped in the flexible starting sleeve, and the moving device is used to move the flexible starting sleeve system and the excavation device wrapped in the flexible starting sleeve back and forth along the starting axis direction of the communication channel; the flexible starting sleeve system is connected to the main tunnel segment through the first flexible annular sleeve at its front end, and the flexible receiving sleeve system is connected to the main tunnel segment through the second flexible annular sleeve at its front end.

[0009] Furthermore, the flexible starting sleeve system also includes a starting steel sleeve, the rear end of the first flexible annular sleeve is connected to the starting steel sleeve by bolts, and the front end is connected to the main tunnel segment by bolts with a first annular flange plate.

[0010] Furthermore, the flexible receiving sleeve system also includes a receiving steel sleeve and an end sealing plate; the end sealing plate is arranged at the rear of the receiving steel sleeve, and the second flexible annular sleeve is arranged at the front end of the receiving steel sleeve; the rear end of the second flexible annular sleeve is connected to the receiving steel sleeve by bolts, and the front end is connected to the main tunnel segment by bolts and the second annular flange plate.

[0011] Furthermore, the first flexible annular sleeve and the second flexible annular sleeve are made of rubber or other flexible materials.

[0012] Furthermore, the tunneling device is a shield machine or a pipe jacking machine.

[0013] Furthermore, the first flexible annular sleeve and the second flexible annular sleeve are both formed by splicing one or several annular sleeve segments, and an annular mounting wing is provided on each side of the annular sleeve segment. A plurality of bolt holes are provided on the annular mounting wing, and adjacent annular sleeve segments are connected and fixed by a connecting kit.

[0014] Furthermore, the connection kit includes two annular pressure plates, a steel circular ring connecting plate, and bolts penetrating the annular pressure plates, the annular mounting wings and the steel circular ring connecting plate. The annular pressure plates and the steel circular ring connecting plate are both provided with corresponding bolt holes matching the bolts.

[0015] The present invention provides a construction method for tunnel communication channel excavation equipment using a flexible sleeve for initial reception, characterized in that it comprises the following construction steps:

[0016] S1. Construction preparation: Before construction, the outside of the starting tunnel gate is reinforced, and the reinforcement body is tested, the horizontal transportation track is installed, the water and electricity are installed, the joints of the steel-concrete pipe segments at the tunnel gate are welded, and the tunnel gate ring is installed;

[0017] S2. Equipment installation and commissioning: hoisting, transporting tunneling equipment and related supporting equipment and materials, and positioning, assembling and commissioning;

[0018] S3. Cutting of the main tunnel segment at the starting tunnel portal: After the equipment is installed and debugged, the tunneling device starts to tunnel out and uses the cutterhead to cut the main tunnel segment at the starting tunnel portal. The tunneling device extends the cutting reinforcement ring, and the rotation of the cutterhead drives the cutting reinforcement ring to rotate, thereby cutting the main tunnel segment at the starting tunnel portal;

[0019] S4. Retracting and taking out the main tunnel segment at the starting tunnel portal: the cutting reinforcement ring carries the cut main tunnel segment at the starting tunnel portal back into the main tunnel;

[0020] After the soil at the tunnel portal is confirmed to be stable and water-proof, loosen the connecting bolts between the first flexible annular sleeve and the first annular flange plate to separate the front end of the first flexible annular sleeve from the first annular flange plate. Adjust the moving device to move the tunneling device and the flexible starting sleeve system wrapping the tunneling device backward by 0.5 to 1.0 m, and take out the cut tunnel portal segment;

[0021] After the cutting reinforcement ring is retracted to its original position, the mobile device and the flexible starting sleeve system wrapping the excavation equipment are moved back to their original positions; the excavation device cutter head is aligned with the starting tunnel door of the communication channel, and the first flexible annular sleeve of the flexible starting sleeve system is reconnected to the first annular flange plate;

[0022] S5, start excavation: inject earth pressure balance medium into the soil bin behind the cutter head of the excavation device, and the excavation device starts normal excavation and segment assembly;

[0023] S6. Cutting the main tunnel segment at the receiving tunnel portal: after the excavation device excavates to the receiving tunnel portal, the cutting reinforcement ring is extended, and the rotation of the cutterhead drives the cutting reinforcement ring to rotate, so that the cutting reinforcement ring cuts the main tunnel segment at the receiving tunnel portal;

[0024] S7, receiving and excavating: the excavating equipment carries the main tunnel segment at the receiving portal that has been cut and penetrated into the flexible receiving sleeve system;

[0025] S8. Sealing of receiving tunnel gate: After the receiving excavation is completed, the receiving tunnel gate will be sealed, grouting will be injected behind the wall, the steel plate of the tunnel gate will be welded, the equipment will be dismantled, and the construction will be completed.

[0026] Furthermore, the step S2 also includes installation of the flexible launching sleeve system, assembly of the flexible receiving sleeve system and testing of the sealing effect of the flexible receiving sleeve system.

[0027] Furthermore, the S2 step also includes adjusting the posture of the tunneling device; adjusting the posture of the tunneling device includes adjusting the moving device to bring the tunneling device closer to the starting position of the tunnel portal; and at the same time, checking that all systems of the tunneling device and supporting equipment are in a complete and normal working state.

[0028] Furthermore, in the step S4, the segment removal process method is: open the connection between the first flexible annular sleeve and the first annular flange plate, and remove the cut main tunnel segment at the starting portal by a lifting device pre-installed inside the main tunnel at the starting portal.

[0029] Furthermore, the step S4 also includes inspecting the stability and water-stopping effect of the portal reinforcement after cutting through the main tunnel segment at the starting portal.

[0030] Compared with the prior art, the present invention has the following technical effects:

[0031] (1) Compared with the traditional rigid sleeve, the flexible sleeve system has better adaptability to the installation environment conditions on site and is easier to install and connect. The flexible sleeve system can be appropriately adjusted according to the angle of the TBM when it is launched and received, which improves the adaptability of entering and exiting the tunnel portal, avoids the docking mismatch problem caused by the influence of the construction process, processing accuracy, various deformations, and measurement errors during the actual construction of the sleeve when it is launched and received, and avoids damage to the main tunnel segment of the tunnel portal.

[0032] (2) The present invention uses a cutting reinforcement ring to cut the portal segments in the starting and receiving stages, which makes it easier to cut into the main tunnel segments without deviating from the excavation axis. It also has better cutting efficiency, saves more controllable construction period, reduces disturbance to the soil layer at the receiving end, and reduces surface settlement at the receiving end.

[0033] (3) The flexible annular sleeve in the flexible sleeve system of the present invention is easy to open and reinstall; compared with the rigid launching sleeve, this structure can remove the main tunnel segment cut during the launching.

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a schematic diagram of the overall structure of the equipment of the present invention.

[0036] Figure 2 This is a schematic diagram of the structure of the initial cutting segment of the present invention.

[0037] Figure 3 This is a schematic diagram of the tunneling equipment of the present invention carrying the pipe segment out.

[0038] Figure 4 It is a schematic diagram of receiving the tunneling equipment of the present invention.

[0039] Figure 5 It is a schematic diagram of the structure of the flexible launching sleeve system of the present invention.

[0040] Figure 6 It is a schematic diagram of the structure of the flexible receiving sleeve system of the present invention.

[0041] Figure 7 This is a schematic diagram of the cutter head structure of the tunneling equipment of the present invention.

[0042] Figure 8 It is a schematic diagram of the structure of the first and second flexible annular sleeves of the present invention.

[0043] Fig. 9 It is a schematic diagram of the structure of the steel ring connecting plate of the present invention.

[0044] Reference numerals:

[0045] 1-cutter disc; 2-telescopic spokes; 3-cutting reinforcement ring;

[0046] 4-advance connecting rod; 5-cutting reinforcement ring advance cylinder; 6-support trolley;

[0047] 7-reinforcement body; 8-flexible launching sleeve system; 9-first annular flange plate;

[0048] 10-first flexible annular sleeve; 11-initial steel sleeve; 12-wire brush;

[0049] 13-main tunnel segment; 14-main tunnel segment; 15-flexible receiving sleeve system;

[0050] 16-second annular flange plate; 17-second flexible annular sleeve; 18-receiving steel sleeve;

[0051] 19-end sealing plate; 20-moving device; 21-main tunnel segment

[0052] 22- annular sleeve segment; 23- annular mounting wing; 24- connection kit;

[0053] 25-annular pressure plate; 26-steel circular ring connecting plate. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings.

[0055] like Figure 1-7 As shown, an embodiment of the present invention discloses a tunnel communication channel excavation equipment using flexible sleeve initiation and reception, including an excavation device, a support trolley 6, a flexible initiation sleeve system 8, a flexible receiving sleeve system 15 and a moving device 20.

[0056] The tunneling device is provided with a cutter head 1 with telescopic spokes 2, a cutting reinforcement ring 3, a propulsion connecting rod 4 and a cutting reinforcement ring propulsion cylinder 5. The flexible starting sleeve system 8 includes a starting steel sleeve 11 and a first flexible annular sleeve 10 arranged at the front end of the starting steel sleeve 11. The rear end of the first flexible annular sleeve 10 is bolted to the starting steel sleeve 11, and the front end is connected to the first annular flange plate 9 by bolts. The front end of the first annular flange plate 9 is connected to the main tunnel segment 21 by an annular steel plate. The flexible receiving sleeve system 15 includes a receiving steel sleeve 18, an end sealing plate 19 arranged at the rear of the receiving steel sleeve 18, and a second flexible annular sleeve 17 arranged at the front end of the receiving steel sleeve 18. The rear end of the second flexible annular sleeve 17 is bolted to the receiving steel sleeve 18, and the front end is connected to the second annular flange plate 16 by bolts. The front end of the second annular flange plate 16 is connected to the main tunnel segment 21 by an annular steel plate.

[0057] The first flexible annular sleeve 10 and the second flexible annular sleeve 17 are both made of rubber or other flexible materials. Figure 8 and 9 As shown, the first flexible annular sleeve 10 and the second flexible annular sleeve 17 are both formed by splicing one or more annular sleeve segments 22, and an annular mounting wing 23 is provided on both sides of the annular sleeve segment 22. The annular mounting wing 23 is provided with a plurality of bolt holes, and the adjacent annular sleeve segments 22 are connected and fixed by a connecting kit 24. The connecting kit 24 includes two annular pressing plates 25, a steel circular ring connecting plate 26, and bolts penetrating the annular pressing plates 25, the annular mounting wing 23 and the steel circular ring connecting plate 26. The annular pressing plates 25 and the steel circular ring connecting plate 26 are both provided with bolt holes that match the bolts.

[0058] The moving device 20 is installed on the supporting trolley 6, which supports the flexible starting sleeve system 8 and the excavation device wrapped in the flexible starting sleeve system 8. The moving device 20 can move the flexible starting sleeve system 8 and the excavation device wrapped in the flexible starting sleeve system 8 back and forth along the starting axis direction of the connecting channel.

[0059] Among them, the excavation device is a shield machine or a pipe jacking machine with a cutting reinforcement ring 3. The cutter head 1 includes a cutter head and a telescopic spoke 2 that can cut the soil. When the telescopic spoke 2 is extended, the cutter head 1 is in a normal cutting state, and its excavation diameter is slightly larger than the shield diameter; when the telescopic spoke 2 is retracted, the diameter of the cutter head 1 is smaller than the inner diameter of the aforementioned cutting reinforcement ring 3. The cutting reinforcement ring 3 includes a circular cylinder and a cylinder extension and recovery system, and a cutter is arranged at the front end of the cutting reinforcement ring 3. When the telescopic spoke 2 of the cutter head 1 is retracted, the cutting reinforcement ring 3 can be smoothly extended to a certain length at the front end of the cutter head 1. When the cutter head 1 is in a normal cutting state, the telescopic spoke 2 is in an extended state; when the telescopic spoke 2 is retracted, the cutting reinforcement ring 3 is extended, and the rotation of the cutter head 1 drives the rotation of the cutting reinforcement ring 3 to cut the main tunnel segment at its front end. The main tunnel segment is a reinforced concrete segment, a glass fiber reinforced segment, or a steel-concrete composite segment.

[0060] The embodiment of the present invention also discloses a method for construction using the above-mentioned tunneling equipment, comprising the following construction steps:

[0061] S1. Construction preparation: Before construction, the starting tunnel gate is reinforced outside and the reinforcement body 7 is inspected, the horizontal transport track is installed, water and electricity are installed, the joints of the steel-concrete pipe segments at the tunnel gate are welded, and the tunnel gate ring is installed.

[0062] S2. Equipment installation and commissioning: hoisting, transportation of tunneling equipment and supporting equipment and materials, and positioning, assembly and commissioning.

[0063] S3. Cutting of the main tunnel segment at the starting tunnel portal: After the equipment is installed and debugged, the tunneling device starts to tunnel out and uses the cutter head 1 to cut the main tunnel segment 13 at the starting tunnel portal. The tunneling device extends the cutting reinforcement ring 3, and the rotation of the cutter head 1 drives the cutting reinforcement ring 3 to rotate, thereby cutting the main tunnel segment 13 at the starting tunnel portal.

[0064] S4. Retraction and removal of the main tunnel segment at the starting portal: After the main tunnel segment 13 at the starting portal is cut through, the stability and water-stopping effect of the portal reinforcement are checked, and the cutting reinforcement ring 3 is carried back into the main tunnel with the cut main tunnel segment 13 at the portal (such as Figure 3 shown).

[0065] After the soil at the portal is confirmed to be stable and impermeable, loosen the connecting bolts between the first flexible annular sleeve 10 and the first annular flange plate 9, and disconnect the first flexible annular sleeve 10 from the first annular flange plate 9. Adjust the moving device 20 to move the excavation device and the flexible starting sleeve system 8 that wraps the excavation device backward by 0.5 to 1.0 m, and remove the cut portal segment. The process of removing the portal segment is as follows: open the connection between the first flexible annular sleeve 10 and the first annular flange plate 9, and remove the cut main tunnel segment 13 of the starting portal through the lifting device pre-installed inside the main tunnel.

[0066] After the cutting reinforcement ring 3 is retracted to its original position, the moving device 20 and the flexible starting sleeve system 8 wrapping the excavation device are moved back to their original positions; the cutter head 1 is aligned with the starting tunnel door of the communication channel, and the first flexible annular sleeve 10 is reconnected to the first annular flange plate 9.

[0067] S5. Start excavation: inject earth pressure balance medium into the rear of the cutter head 1 of the excavation device, and the excavation device starts normal excavation and segment assembly; 2 to 3 wire brushes 12 need to be installed inside the rear end of the starting steel sleeve 11, and the wire brushes 12 are smeared with shield tail grease before excavation, and the cavity between the wire brushes 12 is filled with shield tail grease to prevent groundwater from entering the main tunnel.

[0068] S6. Cutting of the main tunnel segment at the receiving tunnel portal: The tunneling device excavates to the outside of the receiving tunnel portal, pauses, extends the cutting reinforcement ring 3, and the tunneling device continues to excavate. The rotation of the cutterhead 1 drives the cutting reinforcement ring 3 to rotate, so that it cuts and penetrates the main tunnel segment 14 at the receiving tunnel portal (such as Figure 4 shown).

[0069] S7. Receiving and excavating: The excavating device carries the main tunnel segment 14 at the receiving portal that has been cut and penetrated into the flexible receiving sleeve system 15.

[0070] S8. Sealing of tunnel gate: After the receiving excavation is completed, the receiving tunnel gate will be sealed, grouting will be injected behind the wall, the steel plate of the tunnel gate will be welded, the equipment will be dismantled, and the construction will be completed.

[0071] Among them, step S2 also includes the installation of the flexible starting sleeve system 8, the assembly of the flexible receiving sleeve system 15, the sealing effect detection of the flexible receiving sleeve system 8 and the posture adjustment of the tunneling device. The posture adjustment of the tunneling device includes adjusting the moving device 20 to make the tunneling device close to the starting position of the tunnel gate; at the same time, check that all systems of the tunneling device and supporting equipment are in a complete and normal working state.

[0072] Compared with the prior art, the present invention has the following technical effects:

[0073] (1) The flexible sleeve system of the present invention (including a flexible launching sleeve system and a flexible receiving sleeve system) has better adaptability to the on-site installation environment conditions and is easier to install and connect; the flexible sleeve system can be appropriately adjusted according to the posture of the tunnel boring machine when launching and receiving, thereby improving the adaptability of entering and exiting the tunnel portal, avoiding the docking mismatch problem caused by the influence of the construction process, processing accuracy, various deformations, and measurement errors during the actual construction of the sleeve launch and receiving, and avoiding damage to the main tunnel segment of the tunnel portal.

[0074] (2) The present invention uses a cutting reinforcement ring to cut the portal segments in the starting and receiving stages, which makes it easier to cut into the main tunnel segments without deviating from the excavation axis. It also has better cutting efficiency, saves construction time and is more controllable. It also has less disturbance to the soil layer near the outside of the portal and less surface settlement at the receiving end.

[0075] (3) The flexible annular sleeve in the flexible sleeve system of the present invention is easy to open and reinstall; compared with the rigid launching sleeve, this structure can remove the main tunnel segment cut during the launching.

[0076] The present invention is not limited to the above-mentioned specific implementation modes. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A tunnel communication channel excavation equipment using a flexible sleeve to initiate and receive, comprising an excavation device and a supporting trolley, wherein the excavation device is provided with a cutter head with telescopic spokes, a cutting reinforcement ring, a propulsion connecting rod and a cutting reinforcement ring propulsion cylinder; characterized in that: It also includes a flexible starting sleeve system, a flexible receiving sleeve system and a moving device; the moving device is installed on a supporting trolley, on which the flexible starting sleeve system and the tunneling device wrapped in the flexible starting sleeve are supported, and the moving device is used to move the flexible starting sleeve system and the tunneling device wrapped in the flexible starting sleeve forward and backward along the starting axis direction of the connecting channel; the flexible starting sleeve system is connected to the main tunnel segment through the first flexible annular sleeve at its front end, and the flexible receiving sleeve system is connected to the main tunnel segment through the second flexible annular sleeve at its front end; the first flexible annular sleeve and the second flexible annular sleeve are made of rubber; the tunneling device is a shield machine or a pipe jacking machine.

2. The tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 1 is characterized in that: The flexible starting sleeve system also includes a starting steel sleeve. The rear end of the first flexible annular sleeve is connected to the starting steel sleeve by bolts, and the front end is connected to the main tunnel segment by bolts with a first annular flange plate.

3. The tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 1, characterized in that: The flexible receiving sleeve system also includes a receiving steel sleeve and an end sealing plate; the end sealing plate is arranged at the rear of the receiving steel sleeve, and the second flexible annular sleeve is arranged at the front end of the receiving steel sleeve; the rear end of the second flexible annular sleeve is connected to the receiving steel sleeve by bolts, and the front end is connected to the main tunnel segment by bolts and the second annular flange plate.

4. The tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 1, characterized in that: The first flexible annular sleeve and the second flexible annular sleeve are both formed by splicing one or several annular sleeve segments, and an annular mounting wing is provided on each side of the annular sleeve segment. The annular mounting wing is provided with several bolt holes, and adjacent annular sleeve segments are connected and fixed by a connecting kit.

5. The tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 4 is characterized in that: The connection kit includes two annular pressure plates, a steel circular ring connecting plate, and bolts penetrating the annular pressure plates, the annular mounting wings and the steel circular ring connecting plate. The annular pressure plates and the steel circular ring connecting plate are both provided with bolt holes matching the bolts.

6. A construction method for tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception, characterized in that: The construction steps include: S1. Construction preparation: Before construction, the outside of the starting tunnel gate is reinforced, and the reinforcement body is tested, the horizontal transportation track is installed, the water and electricity are installed, the joints of the steel-concrete pipe segments at the tunnel gate are welded, and the tunnel gate ring is installed; S2. Equipment installation and commissioning: hoisting, transporting tunneling equipment and related supporting equipment and materials, and positioning, assembling and commissioning; S3. Cutting of the main tunnel segment at the starting tunnel portal: After the equipment is installed and debugged, the tunneling device starts to tunnel out and uses the cutterhead to cut the main tunnel segment at the starting tunnel portal. The tunneling device extends the cutting reinforcement ring, and the rotation of the cutterhead drives the cutting reinforcement ring to rotate, thereby cutting the main tunnel segment at the starting tunnel portal; S4. Retracting and taking out the main tunnel segment at the starting tunnel portal: the cutting reinforcement ring carries the cut main tunnel segment at the starting tunnel portal back into the main tunnel; After the soil at the tunnel entrance is confirmed to be stable and water-proof, the connecting bolts between the first flexible annular sleeve and the first annular flange are loosened to separate the front end of the first flexible annular sleeve from the first annular flange; The moving device is adjusted to move the tunneling device and the flexible starting sleeve system wrapping the tunneling device backward by 0.5 to 1.0 m, and the cut portal segment is taken out; After the cutting reinforcement ring is retracted to its original position, the mobile device and the flexible starting sleeve system wrapping the excavation equipment are moved back to their original positions; the excavation device cutter head is aligned with the starting tunnel door of the communication channel, and the first flexible annular sleeve of the flexible starting sleeve system is reconnected to the first annular flange plate; S5, start excavation: inject earth pressure balance medium into the soil bin behind the cutter head of the excavation device, and the excavation device starts normal excavation and segment assembly; S6. Cutting the main tunnel segment at the receiving tunnel portal: after the excavation device excavates to the receiving tunnel portal, the cutting reinforcement ring is extended, and the rotation of the cutterhead drives the cutting reinforcement ring to rotate, so that the cutting reinforcement ring cuts the main tunnel segment at the receiving tunnel portal; S7, receiving and excavating: the excavating equipment carries the main tunnel segment at the receiving portal that has been cut and penetrated into the flexible receiving sleeve system; S8. Sealing of receiving tunnel gate: After the receiving excavation is completed, the receiving tunnel gate will be sealed, grouting will be injected behind the wall, the steel plate of the tunnel gate will be welded, the equipment will be dismantled, and the construction will be completed.

7. The construction method of tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 6 is characterized in that: The S2 step also includes the installation of the flexible starting sleeve system, the assembly of the flexible receiving sleeve system, the testing of the sealing effect of the flexible receiving sleeve system and the posture adjustment of the tunneling device; the posture adjustment of the tunneling device includes adjusting the moving device to bring the tunneling device closer to the starting position of the tunnel portal; at the same time, checking that all systems of the tunneling device and supporting equipment are in a complete and normal working state.

8. The construction method of tunnel communication channel excavation equipment using a flexible sleeve for initiation and reception according to claim 7, characterized in that: In the step S4, the segment removal process method is: open the connection between the first flexible annular sleeve and the first annular flange plate, and remove the cut main tunnel segment at the starting tunnel portal by a lifting device pre-installed inside the main tunnel at the starting tunnel portal.

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