A mechanical method of constructing a connecting passage in synchronization with a main line tunnel of a subway

Abstract

The application discloses a kind of mechanical method contact passage construction method being implemented synchronously with subway main line tunnel, comprising the following steps: track adjustment;Construction preparation;Transport and fixedly mounted and dismounted type originating trolley, mounted and dismounted type receiving trolley, tunneling host, the partial disassembly of mounted and dismounted type originating trolley is carried out, the partial disassembly of mounted and dismounted type receiving trolley is carried out;Quick mounted and dismounted type tunnel support frame installation, installation of counter-pulling type force device;Equipment debugging, tunneling, segment assembly, slag removal;Equipment receiving, receiving sleeve removal;Tunneling host, mounted and dismounted type originating trolley, mounted and dismounted type receiving trolley in-hole scene use.The application can provide conditions for main line tunnel and mechanical method contact passage synchronous construction, and only needs to make simple modification to original main line tunnel portal position track, without removing main line tunnel facilities, without affecting main line battery locomotive traffic, can continuously portal scene construction multiple passages in the same interval, without transporting host to shield well mouth to make U-turn, greatly improve equipment turnover efficiency.

Description

Technical Field

[0001] This invention relates to the field of connecting passage construction technology, and in particular to a mechanical method for constructing connecting passages simultaneously with the main tunnel of a subway line. Background Technology

[0002] The construction of connecting passages is an important component of subway tunnel engineering. Currently, connecting passages are mostly constructed using mining methods and freezing + mining methods, which have low safety, long construction periods, poor adaptability in water-rich or soft soil areas, and are more difficult to construct over long distances.

[0003] In recent years, with the development of technology, research and applications of mechanical connection tunnels have gradually emerged, making their construction increasingly popular. However, current mechanical connection tunnel construction can only proceed after the main tunnel has been completed or construction has been suspended. Furthermore, to facilitate the horizontal transport of mechanical connection tunnel equipment within the main tunnel section, most existing temporary facilities within the main tunnel need to be dismantled. These factors directly impact main tunnel construction. In addition, mechanical connection tunnel construction is costly.

[0004] A search revealed a Chinese utility model patent, CN 219197335 U, with an authorization announcement date of June 16, 2023, disclosing a jacking system for excavating T-shaped connecting passages in a tunnel group. The jacking system includes a reaction frame and a first force transmission component. The reaction frame provides support for the excavating equipment in the excavation direction. The first force transmission component connects the reaction frame to the main tunnel segment located on the side of the reaction frame opposite to the connecting passage. The supporting force acting on the reaction frame is transmitted to the main tunnel segment via the first force transmission component. A passageway along the extension direction of the main tunnel is provided on the side of the reaction frame opposite to the connecting passage. According to this design, the passageway behind the reaction frame allows vehicles, personnel, and materials to pass through. This allows for the transfer of materials and personnel between different locations in the main tunnel using the space on the side of the reaction frame opposite to the connecting passage, enabling multiple construction processes to be carried out simultaneously. In particular, it allows for the simultaneous construction of multiple connecting passages at different locations of the completed main tunnel, significantly shortening the construction cycle.

[0005] While the aforementioned utility model patent provides a design concept for setting up a passageway at the rear of the reaction frame, it only involves a jacking system and does not consider the specific procedures and layout methods for the simultaneous construction of the mechanical connecting passage and the main tunnel. Therefore, it is necessary to design a low-cost method for the simultaneous construction of the mechanical connecting passage and the main tunnel. Summary of the Invention

[0006] To address the shortcomings in the aforementioned background technology, this invention proposes a mechanical method for constructing connecting passages that can be carried out simultaneously with the main tunnel of a subway line, thus solving the technical problem that existing mechanical methods for constructing connecting passages cannot be carried out simultaneously with the main tunnel.

[0007] The technical solution of this application is as follows: A mechanical method for constructing connecting passages simultaneously with the main tunnel of a subway line includes the following steps: Step 1: Track adjustment. Fine-tune the track at the portal of the connecting passage to make it a two-lane track. One track is used for supporting the trolley, and the other track is used for the main tunnel passage. That is, the track at the portal of the connecting passage is fine-tuned to make it a two-lane track.

[0008] Step 2: Construction preparation; Step 3: Transport and secure the detachable launching trolley, detachable receiving trolley, and tunneling machine. Position the tunneling machine and partially disassemble the detachable launching trolley at the launching end to clear passage for the main tunnel. Similarly, partially disassemble the detachable receiving trolley at the receiving end to clear passage for the main tunnel. The detachable launching and receiving trolleys are used for launching and receiving the tunneling machine, respectively. After the trolleys are transported horizontally to their designated positions, parts of the trolleys can be disassembled to clear passage for the main tunnel's battery-powered locomotive. The detachable trolley turntable allows adjustment of the main machine's angle for launching attitude positioning, main machine relocation within the tunnel, and relocation within the main tunnel. The turntable can be partially disassembled along with the trolley.

[0009] Step 4: Installation of the quick-release tunnel support frame and the reverse-pull load-bearing device; the reverse-pull load-bearing device consists of four parts: a column, a hydraulic cylinder, a jacking iron, and a slide rail. One end of the hydraulic cylinder is connected to the main tunnel segment, and the other end is connected to the column. The column and the jacking iron are an integrated structure. Hydraulic power causes the hydraulic cylinder to repeatedly travel, driving the column to slide on the slide rail, thus advancing the main unit and tunnel segments.

[0010] Step 5: Equipment debugging, tunneling, segment assembly, and muck removal.

[0011] Step 6: Equipment reception, and removal of the receiving sleeve.

[0012] Step 7: The tunneling machine, detachable launching platform, and detachable receiving platform are moved and used inside the tunnel.

[0013] Step 8: Repeat steps 1 through 7 to construct the connecting passage for the next section of the same area.

[0014] Furthermore, in the second step, a gantry crane is installed at the main tunnel portal. This gantry crane is used for sleeve installation, hoisting system functional modules to the stacking platform, and for excavated soil transportation and segment hoisting. A prefabricated launching sleeve is installed at the launching portal, and a partially prefabricated receiving sleeve is installed at the receiving portal. The prefabricated launching sleeve and receiving sleeve are used for launching and receiving the main tunneling machine, respectively. The prefabricated launching sleeve is welded to the main tunnel portal segment steel, and a wire brush is installed at the tail end for initial pressure maintenance. The prefabricated receiving sleeve is welded to the main tunnel portal segment steel and is used for receiving the main machine. It can be disassembled in sections for easy relocation of the main machine. A portable positioning cylinder is used to move the shield launching / receiving frame horizontally. Trolley bottom supports are installed at the launching and receiving portals, and a stacking platform is installed near the launching portal. The gantry crane is used to hoist the system functional modules to the stacking platform. The bottom support component of the trolley is used for installation and fixation after the detachable launching trolley and detachable receiving trolley have been transported to their positions. The bottom support component ensures timely support and fixation of the lower part of the detachable launching trolley and detachable receiving trolley after they are in place, providing the necessary conditions for disassembly.

[0015] Furthermore, in the third step, the excavator, adjustable shield launching frame, detachable trolley turntable, and detachable launching trolley are transported at the starting end to the predetermined position at the tunnel entrance.

[0016] Furthermore, before positioning the tunneling host in the third step, the detachable launching trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the tunneling host head is vertically adjusted by the shield launching frame, and the shield launching frame is horizontally moved by the portable positioning cylinder. The tunneling host cutterhead is pushed into the assembled launching sleeve. Then, the detachable launching trolley at the launching end is partially disassembled to make way for the battery locomotives in the main tunnel.

[0017] Furthermore, in the third step, the remaining assembled receiving sleeves, adjustable shield receiving frame, detachable trolley turntable, and detachable receiving trolley are transported to the predetermined position at the tunnel entrance. The trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the assembled receiving sleeve on the trolley is vertically adjusted by the shield receiving frame, and the assembled receiving sleeve on the trolley is horizontally moved by the portable positioning cylinder. The assembled receiving sleeve on the trolley is connected to the pre-installed assembled receiving sleeve, and the detachable receiving trolley at the receiving end is partially disassembled to make way for the battery-powered locomotives in the main tunnel.

[0018] Furthermore, in the fourth step, the quick-installation tunnel support frame is a quick-installation tunnel support frame.

[0019] Furthermore, in the fifth step, the excavated soil is dumped into the excavation hopper of the locomotive train of the main tunnel by a gantry crane for unloading; the tunnel segments and temporary small excavation hoppers are temporarily placed on the stacking platform for use during tunneling.

[0020] Furthermore, in the sixth step, after the equipment has been excavated and penetrated, the receiver at the receiving end is detached from the tunnel portal sleeve, and the assembled receiver sleeve at the receiving end is disassembled.

[0021] Furthermore, in the seventh step, the detachable trolley and detachable trolley turntable at the receiving end are reassembled. The tunneling host on the detachable trolley is horizontally moved to the center of the detachable trolley turntable by a portable positioning hydraulic cylinder. The tunneling host is then turned around by rotating the detachable trolley turntable to prepare for the construction of the next connecting passage in the same section.

[0022] Furthermore, in the eighth step, the bottom support components of the detachable launching trolley and the detachable receiving trolley are first removed, and the detachable launching trolley, the detachable receiving trolley and their carriers are transported to the same section for the construction of the next connecting passage.

[0023] Compared with the prior art, the technical solution of the present invention has the following technical effects: This invention enables the simultaneous construction of the main tunnel and the mechanical method connecting passage. As a result, only simple modifications are needed to the existing main tunnel portal track, without requiring any adjustments to the track's slope or height; the mechanical method passage equipment does not require the dismantling of main tunnel facilities during transportation; the construction of the mechanical method passage does not affect the passage of main line battery-powered locomotives, and the muck removal from the passage is transported by main line battery-powered locomotives in formation; the mechanical method passage equipment can be used to construct multiple passages consecutively at the same tunnel portal within the same section, without needing to transport the main unit to the shield tunnel shaft for turning around, greatly improving equipment turnover efficiency; and the modular design of the equipment system significantly reduces the cost of the mechanical method connecting passage equipment. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram showing the status of the sending and receiving ends during track adjustment. Figure 2 A schematic diagram showing the status of the launching and receiving ends during construction preparation; Figure 3 A schematic diagram showing the status of the transport and dismantling launching trolley, the dismantling receiving trolley, and the tunneling main unit; Figure 4 A schematic diagram showing the status of the fixed and detachable launching trolley, the detachable receiving trolley, and the tunneling main unit; Figure 5 This is a schematic diagram showing the partial disassembly and reassembly of the launching trolley and the receiving trolley. Figure 6 A schematic diagram showing the installation of a quick-release tunnel support frame and a counter-tensioning device. Figure 7 A schematic diagram showing the status of equipment commissioning, tunneling, segment assembly, muck removal, and equipment receiving; Figure 8 A schematic diagram illustrating the status of the detachable launching trolley, detachable receiving trolley, and tunneling main unit for relocation. exist Figures 1-8 In the diagrams, the left side shows schematics of the transmitting end, and the right side shows schematics of the receiving end. Explanation of icon numbers: 1-Changing track; 2- Overhead crane device; 3-Assembled launching sleeve; 31-Assembled receiving sleeve; 4-System functional modules; 5-Stacking platform; 6-Car bottom support components; 7-Detachable launching trolley; 71-Detachable receiving trolley; 8-Tunneling machine; 9- Quick-install and dismantle tunnel support frame; 10-Reverse tension type force-bearing device; 11-Segment; 12-Slag bucket. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] A mechanical method for constructing connecting passages simultaneously with the main tunnel of a subway line includes the following steps: Step 1: As Figure 1 As shown, the track was adjusted, and the connecting passage portal track was fine-tuned to become a two-lane track. One track is used for supporting the trolley, and the other track is used for the main tunnel passage.

[0028] Step 2: As Figure 2 As shown, construction preparation.

[0029] Step 3: As Figures 3-5 The transport and fixing of the detachable launching trolley, the detachable receiving trolley, and the tunneling machine are shown. The tunneling machine is positioned, and the detachable launching trolley at the launching end is partially disassembled to make way for the main tunnel. The detachable receiving trolley at the receiving end is also partially disassembled to make way for the main tunnel.

[0030] Step 4: As Figure 6 As shown, the installation of the quick-release tunnel support frame and the installation of the anti-tension force-bearing device are shown.

[0031] Step 5: As Figure 7 As shown, the process includes equipment debugging, tunneling, segment assembly, and slag removal.

[0032] Step 6: Equipment reception, and removal of the receiving sleeve.

[0033] Step 7: As Figure 8 As shown, the tunneling machine, detachable launching platform, and detachable receiving platform are used for internal tunnel relocation.

[0034] Step 8: Repeat steps 1 through 7 to construct the connecting passage for the next section of the same area.

[0035] The construction measures device of the present invention includes: a track-changing track 1, that is, the track after the minor adjustment of the connecting passage portal track, which becomes a two-lane track.

[0036] The overhead crane device 2 is used for sleeve installation, for lifting system functional modules 4 to the stacking platform 5, and for transporting excavated soil and lifting segments 11.

[0037] The modular launching sleeve 3 and the modular receiving sleeve 31 are used for launching the tunneling machine 8 and receiving the tunneling machine 8, respectively. The modular launching sleeve 3 is welded to the main tunnel portal steel segment and has a wire brush at its tail for pressure maintenance during launch. The modular receiving sleeve 31 is welded to the main tunnel portal steel segment and is used for receiving the machine. They are modular and can be disassembled for easy relocation of the machine. A portable positioning cylinder is used to move the shield launching / receiving frame horizontally.

[0038] System functional module 4 modularizes the system functions on the supporting trolley after the conventional mechanical method connecting channel, and uses the original main tunnel segment transport trailer for delivery to the location.

[0039] Stacking platform 5 is used for stacking system functional modules 4 and for stacking slag and tunnel segments 11.

[0040] The bottom support component 6 of the trolley is used for installation and fixation of the detachable launching trolley 7 and the detachable receiving trolley 71 after they have been transported to their positions. The bottom support component 6 ensures timely support and fixation of the lower part after the detachable launching trolley 7 and the detachable receiving trolley 71 are in place, providing a prerequisite for the disassembly of the trolley.

[0041] The detachable launching trolley 7 and the detachable receiving trolley 71 are used for launching the main excavator 8 and receiving the main excavator 8, respectively. After the trolleys are transported horizontally to their positions, parts of the trolleys can be disassembled to make way for the main line battery locomotive. The detachable trolley turntable can be rotated to adjust the angle of the main excavator to achieve launching attitude positioning, main excavator transfer within the tunnel, and main tunnel transfer. The turntable can be partially disassembled along with the trolley.

[0042] Tunneling machine 8 is used for tunneling the connecting passage.

[0043] The quick-installation and dismantling tunnel support frame 9 is used to support and protect the main line segments at the tunnel portal.

[0044] The adjustable shield launching / receiving frame is equipped with a vertical adjustment device, enabling the main unit to move horizontally and be positioned vertically.

[0045] The anti-pull type force-bearing device 10 consists of four parts: a column, a hydraulic cylinder, a jacking iron, and a slide rail. One end of the hydraulic cylinder is connected to the main tunnel segment, and the other end is connected to the column. The column and the jacking iron are an integral structure. The hydraulic cylinder is repeatedly driven by hydraulic power to move the column on the slide rail, thereby realizing the jacking of the main unit and the tunnel segment.

[0046] Based on the above embodiments, as a preferred embodiment of the present invention, in the second step, a gantry crane is installed at the main tunnel portal, a prefabricated launching sleeve is installed at the launching portal, a partially prefabricated receiving sleeve is installed at the receiving portal, trolley bottom supports are installed at the launching portal and the receiving portal, a stacking platform is installed near the launching portal, and the system functional modules are hoisted onto the stacking platform by the gantry crane.

[0047] Based on the above embodiments, as a preferred embodiment of the present invention, in the third step, the excavator, adjustable shield launching frame, detachable trolley turntable, and detachable launching trolley are transported from the starting end to the predetermined position of the tunnel portal.

[0048] Based on the above embodiments, as a preferred embodiment of the present invention, before positioning the tunneling host in the third step, the detachable launching trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the tunneling host head is vertically adjusted by the shield launching frame, and the shield launching frame is horizontally moved by the portable positioning cylinder to push the tunneling host cutterhead into the assembled launching sleeve. Then, the detachable launching trolley at the launching end is partially disassembled to make way for the battery locomotives of the main tunnel.

[0049] Based on the above embodiments, as a preferred embodiment of the present invention, in the third step, the remaining assembled receiving sleeve, adjustable shield receiving frame, detachable trolley turntable, and detachable receiving trolley are transported to the predetermined position at the tunnel entrance. The trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the assembled receiving sleeve on the trolley is vertically adjusted by the shield receiving frame, and the assembled receiving sleeve on the trolley is horizontally moved by the portable positioning cylinder. The assembled receiving sleeve on the trolley is connected to the pre-installed part of the assembled receiving sleeve. The detachable receiving trolley at the receiving end is partially disassembled to make way for the battery-powered locomotives in the main tunnel.

[0050] Based on the above embodiments, as a preferred embodiment of the present invention, in the fourth step, the quick-installation and dismantling tunnel support frame is a quick-installation and dismantling tunnel support frame.

[0051] Based on the above embodiments, as a preferred embodiment of the present invention, in the fifth step, the excavated soil is dumped into the excavation hopper of the locomotive formation of the main tunnel by a gantry crane for excavation; the tunnel segments and temporary small excavation hoppers are temporarily placed on the stacking platform for use in tunneling.

[0052] Based on the above embodiments, as a preferred embodiment of the present invention, in the sixth step, after the equipment has been excavated and penetrated, the receiver trolley at the receiving end receives the host machine, separates the tunnel portal sleeve, and disassembles the assembled receiver sleeve at the receiving end.

[0053] Based on the above embodiments, as a preferred embodiment of the present invention, in the seventh step, the detachable trolley and detachable trolley turntable of the receiving end are reassembled, and the tunneling host on the detachable trolley is horizontally moved to the center of the detachable trolley turntable by a portable positioning hydraulic cylinder. The tunneling host is then turned around by rotating the detachable trolley turntable to prepare for the construction of the next connecting passage in the same section.

[0054] Based on the above embodiments, as a preferred embodiment of the present invention, in the eighth step, the bottom support components of the detachable launching trolley and the detachable receiving trolley are first removed, and the detachable launching trolley, the detachable receiving trolley and their carriers are transported to the same section for the construction of the next connecting channel.

[0055] As a preferred embodiment of the present invention, the method for simultaneously constructing the mechanical connecting passage during the construction of the main tunnel is as follows: Step 1: Track Adjustment. The track at the tunnel entrance of the connecting passage is slightly adjusted to become a two-lane track, with one track for supporting the trolley and the other for the mainline battery-powered locomotive.

[0056] Step 2: Construction preparation. Install a gantry crane at the main tunnel portal, install prefabricated launching and partial receiving sleeves at the portal, install the trolley bottom support at the launching / receiving portal, and install a stacking platform near the launching portal. Then, use the gantry crane to lift the system functional modules onto the stacking platform.

[0057] Step 3: Transportation, securing, main unit positioning, and disassembly of the launching / receiving trolleys. At the launching end, the main unit, adjustable shield launching frame, and detachable trolley turntable and detachable trolleys are transported to the predetermined position at the tunnel entrance. The trolleys are connected to the pre-installed trolley bottom supports. Then, the main unit angle is quickly adjusted using the trolley turntable, the main unit head position is vertically adjusted using the shield launching frame, and the shield launching frame is horizontally moved using portable positioning cylinders. The main unit cutterhead is then inserted into the assembled launching sleeve. The detachable trolley portion is disassembled to clear a passage for the mainline battery-powered locomotive. At the receiving end, the remaining assembled receiving sleeve and adjustable... The shield receiving frame, the detachable trolley turntable, and the detachable trolley are moved to the predetermined position at the tunnel entrance. The trolley is connected to the pre-installed trolley bottom support. Then, the main unit angle is quickly adjusted using the trolley turntable, the position of the assembled receiving sleeve on the trolley is vertically adjusted using the shield receiving frame, and the assembled receiving sleeve on the trolley is horizontally moved using a portable positioning cylinder. The assembled receiving sleeve on the trolley is connected to the assembled receiving sleeve installed in the first step. The detachable trolley part of the receiving end is disassembled to make way for the main line battery locomotive.

[0058] Step 4: Installation of temporary supports for main tunnel segments and installation of anti-tension bearing devices at the starting end. Anti-tension bearing devices and quick-release tunnel support frames are installed at the starting end.

[0059] Step 5: Equipment commissioning, tunneling, segment assembly, muck removal, and receiving. Muck is dumped using a gantry crane into the muck hopper of the mainline locomotive for removal; segments and temporary small muck hoppers are temporarily placed on a stockpile platform for future use during tunneling.

[0060] Step 6: Equipment reception and dismantling of the receiving sleeve. Once the equipment has been excavated and connected, the receiving trolley receives the main unit, the portal sleeve is separated, and the assembled receiving sleeve at the receiving end is dismantled.

[0061] Step 7: Transferring the main unit and trolley within the tunnel. The receiving end detachable trolley and detachable trolley turntable are reassembled. The main unit on the trolley is moved horizontally to the center of the turntable using a portable positioning cylinder. The main unit is then rotated using the detachable trolley turntable to prepare for the next section of the same tunnel construction.

[0062] Step 8: Reassemble the starting trolley, remove the bottom support components of the starting / receiving trolley, and transport the trolley and its carrier to the next channel in the same section for simultaneous construction.

[0063] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0064] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mechanical method for constructing connecting passages simultaneously with the main tunnel of a subway line, characterized in that... Includes the following steps: Step 1: Track adjustment, fine-tuning the track of the connecting passage portal to a dual-lane track, one track for supporting the trolley and the other for passage through the main tunnel; Step 2: Construction Preparation; Install a gantry crane at the main tunnel portal. This crane is used for sleeve installation, hoisting system functional modules to the stacking platform, and for excavated soil transportation and segment hoisting. Install prefabricated launching sleeves at the launching portal and partially prefabricated receiving sleeves at the receiving portal. The prefabricated launching sleeves and receiving sleeves are used for launching and receiving the tunneling machine, respectively. The prefabricated launching sleeves are welded to the main tunnel portal segments, and a wire brush is installed at the tail end of the sleeve for initial pressure maintenance. The prefabricated receiving sleeves are welded to the main tunnel portal segments. Welded connections are used for receiving the main unit and disassembling it into sections to facilitate the relocation of the main unit; portable positioning cylinders are used to move the shield launching / receiving frame horizontally; trolley bottom support components are installed at the launching and receiving portal positions, and a stacking platform is installed near the launching portal to hoist the system functional modules onto the stacking platform using a gantry crane; trolley bottom support components are used for installation and fixation of the detachable launching and receiving trolleys after they have been transported to their positions; the trolley bottom support components ensure timely support and fixation of the lower part after the detachable launching and receiving trolleys are in place, providing the prerequisite for trolley disassembly; Step 3: Transport and secure the detachable launching trolley, detachable receiving trolley, and tunneling machine. Position the tunneling machine. Partially disassemble the detachable launching trolley at the launching end to clear passage for the main tunnel. Similarly, partially disassemble the detachable receiving trolley at the receiving end to clear passage for the main tunnel. The detachable launching trolley and detachable receiving trolley are used for launching and receiving the tunneling machine, respectively. After the trolleys are transported horizontally to their designated positions, parts of the trolleys are disassembled to clear passage for the main tunnel's battery-powered locomotive. The detachable trolley turntable is used to adjust the angle of the main machine to achieve launching posture positioning, main machine relocation within the tunnel, and relocation within the main tunnel. The turntable is partially disassembled along with the trolley. In the third step, the excavator, adjustable shield launching frame, detachable trolley turntable, and detachable launching trolley are transported from the starting end to the predetermined position at the tunnel portal. Before positioning the tunneling host in the third step, the detachable launching trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the tunneling host head is vertically adjusted by the shield launching frame, and the shield launching frame is horizontally moved by the portable positioning cylinder. The tunneling host cutterhead is pushed into the assembled launching sleeve. Then, the detachable launching trolley at the launching end is partially disassembled to make way for the battery locomotives in the main tunnel. In the third step, the remaining assembled receiving sleeve, adjustable shield receiving frame, detachable trolley turntable, and detachable receiving trolley are transported to the predetermined position at the tunnel entrance. The trolley is connected to the pre-installed trolley bottom support. Then, the angle of the tunneling host is quickly adjusted by the trolley turntable, the position of the assembled receiving sleeve on the trolley is vertically adjusted by the shield receiving frame, and the assembled receiving sleeve on the trolley is horizontally moved by the portable positioning cylinder. The assembled receiving sleeve on the trolley is connected to the pre-installed assembled receiving sleeve. The detachable trolley at the receiving end is partially disassembled to make way for the battery locomotives in the main tunnel. Step 4: Installation of quick-release tunnel support frame and reverse-pull force-bearing device; The reverse-pull force-bearing device consists of a column, a hydraulic cylinder, a jacking iron, and a slide rail. One end of the hydraulic cylinder is connected to the main tunnel segment, and the other end is connected to the column. The column and the jacking iron are an integral structure. The hydraulic cylinder is repeatedly driven by hydraulic power to move the column on the slide rail, thereby realizing the jacking of the main unit and tunnel segments. Step 5: Equipment debugging, tunneling, segment assembly, and muck removal; muck is dumped by a gantry crane into the muck buckets of the locomotives in the main tunnel for removal; segments and temporary small muck buckets are temporarily placed on the stacking platform for use during tunneling. Step 6: Equipment reception and dismantling of receiving sleeve; After the equipment tunneling is completed, the receiving trolley at the receiving end receives the main unit, separates the tunnel portal sleeve, and dismantles the assembled receiving sleeve at the receiving end. Step 7: The tunneling machine, detachable launching platform, and detachable receiving trolley are moved to the tunnel for use; the detachable trolley and detachable trolley turntable at the receiving end are reassembled, and the tunneling machine on the detachable trolley is moved horizontally to the center of the detachable trolley turntable by using a portable positioning hydraulic cylinder. The tunneling machine is then turned around by rotating the detachable trolley turntable to prepare for the construction of the next connecting passage in the same section. Step 8: Repeat steps 1 through 7 to construct the connecting passage for the next section of the same area.

2. The mechanical method for constructing connecting passages simultaneously with the main subway tunnel, as described in claim 1, is characterized in that: In the eighth step, the bottom support components of the detachable launching trolley and the detachable receiving trolley are first removed, and the detachable launching trolley, the detachable receiving trolley and their carriers are transported to the same section for the construction of the next connecting passage.

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