Construction methods and equipment for connecting passages

Abstract

This invention relates to the field of subway connecting passage construction technology, and in particular to a method and equipment for constructing connecting passages. The method includes the following steps: 1) constructing a duct connecting the two main tunnels at the location to be excavated; 2) using a sawing tool within the duct to cut the outline of the connecting passage at both ends, simultaneously inserting support components into the cut sections until the outline of the connecting passage is complete; 3) clearing the soil within the outline. Using this method, a duct connecting the two main tunnels is first constructed at the location to be excavated, and then the outline of the connecting passage is cut at both ends using a sawing tool within the duct. Since support components can be used in real-time during the sawing process, pre-treatment of the soil at the corresponding locations is unnecessary before construction, thus solving the problems of long construction cycles and cumbersome operations associated with existing connecting passage construction methods.

Description

Technical Field

[0001] This invention relates to the field of subway connecting passage construction technology, and in particular to a connecting passage construction method and construction equipment. Background Technology

[0002] In order to meet the requirements of personnel evacuation, emergency rescue, and water collection and drainage in emergency situations, it is necessary to excavate a passage in the middle of the up and down tunnels of urban rail transit to arrange connecting passages.

[0003] In traditional construction schemes, urban rail transit connecting passages mostly employ tunnel construction techniques such as mining methods and pipe jacking. Conventional mining methods mainly utilize the self-stability of natural or reinforced soil to ensure excavation safety. Among these, cryogenic reinforcement is a commonly used reinforcement method; however, cryogenic reinforcement has a long construction period, uses liquid nitrogen and other freezing methods, which are costly, and sometimes there are cases where some surrounding rock is not frozen or not frozen in place, posing safety hazards. While pipe jacking has strong applicability to different strata, high safety, and fast construction efficiency, its equipment is complex, construction procedures are cumbersome, and a certain degree of professional expertise is required.

[0004] In recent years, some new methods for excavating connecting passages have emerged in the industry. For example, Chinese invention patent application CN108590695A, published on September 28, 2018, discloses a shield tunneling construction method and a connecting passage. The core of this shield tunneling method is to continuously lengthen the shield shell during the tunneling process, using the shield shell to form the supporting structure for the connecting passage. After construction, the shield shell is ultimately retained in the soil. This construction method requires a large amount of shield shell lengthening material, resulting in high costs and making it difficult to promote widely. Chinese invention patent with announcement number CN102287198B and announcement date of July 3, 2013 discloses a construction method for a connecting passage in fractured strata of a shield tunnel across a river. This method strengthens the strata by grouting in advance before the opening, so that the fractured rock outside the excavation outline of the connecting passage is consolidated into a whole, forming a high-strength water-stop curtain. Then, excavation is carried out using combined vibration-damping blasting technology, and secondary lining is constructed using combined formwork. The advanced grouting process results in a long preparation time and complicated operation in the early stage of construction. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for connecting channels to solve the problems of long construction cycles and cumbersome operations in existing connecting channel construction.

[0006] Meanwhile, the present invention also aims to provide a construction device for connecting channels to solve the problem of long construction cycles in existing connecting channels.

[0007] To solve the above problems, the construction method of the connecting passage of the present invention adopts the following technical solution: the construction method of the connecting passage includes the following steps: 1) at the location of the connecting passage to be excavated, a duct connecting the two main tunnels is constructed between the two main tunnels; 2) at both ends of the duct, the outline of the connecting passage is cut out by sawing tools in the duct, and support components are filled into the cut part while sawing until the outline of the connecting passage is cut out; 3) the soil within the outline is cleared.

[0008] Beneficial Effects: The construction method for connecting passages of the present invention first constructs a duct connecting the two main tunnels, located between the two main tunnels. Then, at both ends of the duct, a sawing tool is used to cut out the outline of the connecting passage. Simultaneously, support components are inserted into the cut sections until the outline of the connecting passage is complete. Finally, the soil within the outline is cleared. Because support components can be used for real-time support during sawing, and the soil within the connecting passage outline is cleared last, it also provides some degree of safety support before clearing. Pre-treatment of the soil at the corresponding locations is unnecessary before construction, thus solving the problems of long construction cycles and cumbersome operations in existing connecting passage construction methods.

[0009] Furthermore, in step 2), the exposed soil formed after sawing is reinforced with grout while sawing. Reinforcing the exposed soil after sawing while sawing can achieve real-time protection and maintain the stability of the sawing position.

[0010] Furthermore, the sawing tool used in step 2) is a chainsaw. A chainsaw itself has the function of excavating channels; using a chainsaw as the sawing tool allows it to simultaneously perform the function of creating channels.

[0011] Furthermore, in step 1), a chainsaw with progressively longer extensions is used to create the channels. After the channels are created, the chainsaw is directly used as the sawing tool in step 2). By using the chainsaw used to create the channels directly as the sawing tool, the step of separately installing and arranging the sawing tool can be omitted, further improving construction efficiency.

[0012] Furthermore, the support component described in step 2) is a precast lining, and adjacent precast linings are connected by socket connectors along the length of the connecting passage. When adjacent precast linings are connected by socket connectors along the length of the connecting passage, they only need to be pushed inward from the end of the connecting passage, which can further improve construction efficiency.

[0013] The construction equipment for the connection passage of the present invention adopts the following technical solution: The construction equipment for the connection passage includes a starting-side frame and a receiving-side frame arranged in the starting-side main tunnel and the receiving-side main tunnel respectively, and a tunneling device for constructing the contour of the connection passage. Position-changing mechanisms are respectively arranged on the starting-side frame and the receiving-side frame. The position-changing mechanism includes a mounting seat that can move along the contour track of the connection passage. The tunneling device includes a driving box and a perforating member that can penetrate the soil body between the starting-side main tunnel and the receiving-side main tunnel. The perforating member simultaneously constitutes a sawing member, or the tunneling device further includes a sawing member independent of the perforating member. The tunneling device can be connected between the connection seats of the starting-side frame and the receiving-side frame to saw out the contour of the connection passage under the drive of the position-changing mechanism.

[0014] Advantages: The construction equipment for the connection passage of the present invention includes both a starting-side frame and a receiving-side frame, and position-changing mechanisms are arranged on both of them. The tunneling device can construct a hole through its perforating member, and then connect its sawing members to the mounting seats of the two position-changing mechanisms respectively. Under the driving effect of the driving box and the driving effect of the position-changing mechanism, the contour of the connection passage is first sawed out. The soil body at the corresponding position does not need to be pretreated before construction, thus solving the problem of the long construction period of the existing connection passage.

[0015] Furthermore, the sawing member is a chain saw. Corresponding driving boxes are respectively arranged on the mounting seats of the starting-side frame and the receiving-side frame. Both ends of the chain saw are respectively connected to the two driving boxes. Using a chain saw as the sawing member and arranging driving boxes at both ends of the chain saw respectively can realize the cooperation of two sets of power, improve the sawing efficiency and the stability of the sawing process.

[0016] Furthermore, the perforating member is an extendable chain saw, and the perforating member simultaneously constitutes the sawing member. Using an extendable chain saw as the perforating member and simultaneously as the sawing member can simplify the structure of the device of the present invention, and can omit the link of separately installing the sawing member during the construction process, with high working efficiency.

[0017] Furthermore, a sliding mechanism is arranged on the mounting seat for driving the driving box to reciprocate to continuously extend the chain saw. The sliding mechanism brings convenience to the continuous extension of the chain saw and can improve the efficiency of connecting the chain saw.

[0018] Furthermore, the sawing width of the chain saw is not less than the thickness of the precast lining body supporting the connection passage. When the sawing width of the chain saw is not less than the thickness of the precast lining body supporting the connection passage, the cut groove formed by its sawing can be used as the installation groove of the precast lining body, so as to realize the advanced (before clearing the central soil body) and rapid support of the connection passage.

[0019] Furthermore, the chainsaw is equipped with nozzles for spraying grout into the exposed soil after sawing. These nozzles enable real-time reinforcement of the exposed soil, ensuring its stability.

[0020] Furthermore, the position transformation mechanism includes an X-axis moving mechanism, a Z-axis lifting mechanism, and a rotating arm that can rotate in the XZ plane. The mounting base is disposed on the rotating arm, wherein the X-axis is the extension direction of the main tunnel.

[0021] Furthermore, the rotating arm is a telescopic arm. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the main tunnel segments;

[0023] Figure 2 This is a schematic diagram of the construction of the duct when excavating a rectangular connecting passage according to Embodiment 1 of the construction method of the connecting passage of the present invention;

[0024] Figure 3 This is a schematic diagram of the initial sawing of the outer contour of a rectangular connecting channel during excavation, according to Embodiment 1 of the connecting channel construction method of the present invention;

[0025] Figure 4 This is a schematic diagram of the sawing of the outer contour of a rectangular connecting channel during the excavation of a rectangular connecting channel in Embodiment 1 of the construction method for connecting channels according to the present invention;

[0026] Figure 5 This is a schematic diagram of removing soil within the outer contour of a rectangular connecting channel during excavation, according to Embodiment 1 of the connecting channel construction method of the present invention;

[0027] Figure 6 This is a schematic cross-sectional view of a rectangular connecting channel excavated according to Embodiment 1 of the connecting channel construction method of the present invention;

[0028] Figure 7 This is a schematic diagram of the longitudinal section of a rectangular connecting channel excavated according to Embodiment 1 of the connecting channel construction method of the present invention;

[0029] Figure 8 This is a schematic diagram of excavating a circular connecting channel according to Embodiment 1 of the connecting channel construction method of the present invention;

[0030] Figure 9 This is a schematic cross-sectional view of a circular connecting channel excavated according to Embodiment 1 of the connecting channel construction method of the present invention;

[0031] Figure 10 This is a schematic cross-sectional view of a horseshoe-shaped connecting channel excavated according to Embodiment 1 of the connecting channel construction method of the present invention;

[0032] Figure 11 This is a schematic diagram of the starting side frame and tunneling device in Embodiment 1 of the connecting passage construction equipment of the present invention;

[0033] Figure 12 This is a diagram showing the usage status of Embodiment 1 of the connecting passage construction equipment of the present invention (during the construction of the duct);

[0034] Figure 13 This is a usage diagram of Embodiment 1 of the construction equipment for the connecting passage of the present invention (after the passage is completed, before the outer contour of the connecting passage is cut);

[0035] Figure 14 This is a usage diagram of Embodiment 1 of the communication channel construction equipment of the present invention (when sawing the outer contour of the communication channel).

[0036] In the diagram: 101. Main tunnel on the starting side; 102. Chainsaw; 103. Support component; 104. Soil; 105. Rectangular connecting passage; 106. Machinable segment; 107. Circular connecting passage; 108. Horseshoe-shaped connecting passage; 109. Main tunnel on the receiving side; 201. Starting side frame; 21. Chassis; 22. Track wheel; 23. Top support device; 24. Rotary arm; 202. Receiving side frame; 203. Tunneling device; 31. Drive box; 32. Sliding mechanism; 204. Nozzle; 301. Hydraulic system; 302. Electrical system; 303. Grouting system; 304. Control panel. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0041] Example 1 of the construction method for the communication channel of the present invention:

[0042] The construction method for this communication channel includes the following steps:

[0043] Step 1) At the location of the connecting passage to be excavated, a duct connecting the two main tunnels is constructed. In this step, a chainsaw 102 is placed in the starting-side main tunnel 101. The chainsaw 102 advances towards the receiving-side main tunnel while its length is extended, thereby completing the excavation of the duct. Simultaneously, a muck chute is placed at the starting-side main tunnel of the chainsaw 102 to collect the excavated soil automatically discharged by the chainsaw 102 during the excavation process.

[0044] Step 2) Arrange sawing tools in the tunnel excavated in Step 1). At both ends of the tunnel, the outline of the connecting passage is cut out using the sawing tools. In this embodiment, the sawing tools are specifically formed by the chainsaw 102 used in Step 1). During the sawing process, the exposed soil formed by the sawing is reinforced by grouting through nozzles arranged on the chainsaw 102. In addition, during the sawing process, support components 103 are filled into the sawn portion until the outline of the connecting passage is cut out. The sawing power comes from the power devices set at both ends of the connecting passage, and the power for the chainsaw to move during the sawing process comes from the position transfer mechanism set at both ends of the connecting passage. The support component 103 is a precast lining, specifically using precast segments. The specific installation method is as follows: one end of the precast lining is connected to the chainsaw 102 by a rope. The chainsaw 102 rotates to move the precast lining towards the receiving side, while the other end is raised to prevent collision. At the other end of the precast lining, when it reaches the starting side, connect the next precast lining piece. Then, use a chainsaw to rotate and move the precast lining piece towards the receiving side until the duct is filled. The next duct is assembled and filled in the same way, except that before the precast lining piece of the next duct is assembled, a certain distance must be maintained from the precast lining piece of the previous duct that has already been filled. After the precast lining piece of the next duct is assembled in place, it is lowered uniformly by adjusting the ropes and aligned with the corresponding socket for splicing. When moving laterally, hand-operated hoists, hydraulic cylinders, or other devices can be used to assist in the relocation and assembly. Before assembly, the debris between the segments must be cleaned. Adjacent precast lining pieces are connected along the length of the connecting channel using socket connectors.

[0045] Step 3) Clean up the soil within the outline, such as... Figure 5 As shown, in this step, the soil is still cleared using the sawing method in step 2) until all the soil 104 in the connecting passage is cleared.

[0046] Figure 1-5The process of excavating a rectangular connecting passage 105 using the connecting passage construction method of the present invention is shown in the figure. In this process, the excavation location of the connecting passage is first determined, and a cuttable segment 106 is selected. Starting from the lower left corner of the rectangular connecting passage 105, a channel is created along the outline of the connecting passage. After the channel is completed, the chainsaw 102 is moved upwards to cut and form the left outer outline of the rectangular connecting passage 105. During the cutting process, when the space in the cut groove is sufficient to install the support member 103, the support member 103 is installed into the cut groove. When the cutting reaches the upper left corner of the rectangular connecting passage 105, the chainsaw 102 is flipped and then moved to the right to form the top outer outline of the rectangular connecting passage 105. This process is repeated until the outer outline of the rectangular connecting passage 105 is cut. After the outer outline of the rectangular connecting passage 105 is cut, the central soil within the connecting passage is cut starting from the lower left corner until all the central soil is removed. Figure 6-7 The rectangular connecting passage 105 obtained from the excavation is shown.

[0047] Figure 8 The process of excavating a circular connecting passage 107 using the connecting passage construction method of the present invention is shown. The only difference between this process and the process of excavating a rectangular connecting passage 105 is that when sawing the outer contour of the circular connecting passage 107, the chainsaw 102 performs translational sawing along a circular trajectory. Figure 9 The circular connecting passage 107 obtained from the excavation is shown.

[0048] Figure 10 The diagram shows a horseshoe-shaped connecting passage 108 excavated using the connecting passage construction method of the present invention. The excavation process of the horseshoe-shaped connecting passage 108 differs from that of the rectangular connecting passage 105 and the circular connecting passage 107 only in that when sawing the outer contour of the horseshoe-shaped connecting passage 108, the chainsaw 102 performs translational sawing along a horseshoe-shaped trajectory.

[0049] Example 2 of the construction method for the communication channel of the present invention:

[0050] In Embodiment 1 of the construction method for the connecting passage of the present invention, the same component, namely the chainsaw 102, is used for both the excavation of the duct and the sawing of the outer contour of the connecting passage. In this embodiment, a drilling rig is used for the excavation of the duct. After the drilling rig completes the excavation, a chainsaw is placed in the duct to saw the outer contour of the connecting passage. Of course, in other embodiments, the excavation of the duct can also be achieved using devices such as small pipe jacking.

[0051] Example 3 of the construction method for the communication channel of the present invention:

[0052] In Embodiment 1 of the construction method for the connecting passage of the present invention, a nozzle is arranged on the chainsaw 102 to directly and in real-time spray grout protection on the exposed soil caused by excavation during the sawing process. In this embodiment, the protection of the exposed soil caused by excavation is achieved by a subsequently arranged grouting pipe. Although it cannot achieve immediate protection of the exposed soil, it simplifies the structure of the chainsaw and improves the splicing efficiency when extending the chainsaw.

[0053] Embodiment 1 of the communication channel construction equipment of the present invention:

[0054] like Figure 11-14 As shown, the equipment includes a starting side frame 201, a receiving side frame 202, and a tunneling device 203 for constructing the outline of the connecting passage.

[0055] The launching side frame 201 includes a chassis 21, track wheels 22 mounted on the chassis, and a top support device 23. The track wheels 22 allow the launching side frame to move along a track (X-direction) in the main tunnel on the launching side. The top support device 23 is used to brace against the wall of the main tunnel on the launching side, thus fixing the launching side frame 201. The chassis 21 is equipped with a position changing mechanism, which includes a moving mechanism along the front-rear direction of the chassis 21, a lifting mechanism along the vertical direction (Z), and a rotating arm 24 that can rotate in the XZ plane. The moving mechanism is located between a support column and the chassis 21, specifically using a slide rail-slider mechanism. The lifting mechanism is located on the support column, specifically a telescopic mechanism. The rotating arm 24 is rotatably mounted on the column and can rotate in the XZ plane. A mounting base is provided at the end of the rotating arm 24 for mounting the tunneling device 203. The rotating arm 24 is a telescopic arm.

[0056] The structure of the receiving side rack 202 is the same as that of the launching side rack 201, so the structure of the receiving side rack 202 will not be described in detail here.

[0057] The tunneling device 203 includes a drive box 31, a perforating component, and a sawing component. In this embodiment, there are two drive boxes 31, respectively mounted on the mounting bases of the starting side frame 201 and the receiving side frame 202. The perforating component is specifically a chainsaw 102; therefore, the drive box 31 is the drive box for the chainsaw 102. A sliding mechanism 32 is provided between the mounting base of the starting side frame 201 and the drive box 31. The sliding mechanism 32 adopts a conventional sliding connection between a slider and a track. Through the sliding mechanism 32, the drive box 31 can be driven to move back and forth, thereby realizing the extension of the chainsaw by adding sections. Figure 12 As shown, in use, the chainsaw 102 can be extended to excavate a through passage between the originating main tunnel 101 and the receiving main tunnel 109. Additionally, in this embodiment, the chainsaw 102 also serves as a sawing tool for cutting the outer contour of the connecting passage. Figure 13 , 14As shown, when sawing the outer contour of the connecting passage, the two ends of the chainsaw 102 are respectively connected to two drive boxes 31. Driven by the position changing mechanism, it moves along the outer contour of the connecting passage, thereby sawing out the outer contour groove of the connecting passage. After moving a certain distance, support components 103 (prefabricated lining) can be installed in the sawn groove to form a support structure (such as...). Figure 14 ).

[0058] In this embodiment, a spray pipe 204 is also arranged on the chainsaw 102. The spray pipe 204 is a pipe with connecting threads at both ends and has holes. The holes form the nozzle structure on the spray pipe 204. Through the nozzle structure, the exposed soil formed by excavation can be sprayed with grout for protection during the sawing process. In the case of no seepage water or slight seepage in the stratum, the solidified grout inside the pipe is sprayed onto the rock walls on both sides by high pressure gas, which can achieve the effect of stabilizing the rock mass on both sides, thereby ensuring the smooth progress of construction.

[0059] In addition to the aforementioned components, the chassis is also equipped with a hydraulic system 301, an electrical system 302, a grouting system 303, and an operating platform 304.

[0060] Embodiment 2 of the communication channel construction equipment of the present invention:

[0061] In Embodiment 1 of the connecting passage construction equipment of the present invention, the perforating component and the sawing component of the tunneling device 203 are designed as an integral structure. In this embodiment, the perforating component is specifically a drill bit, and the sawing component is still a chainsaw. During the construction process, the drill bit is first used to drill a channel between the main tunnel on the starting side and the main tunnel on the receiving side, and then the chainsaw is sent into the channel to saw the outer contour of the connecting passage.

[0062] Embodiment 3 of the communication channel construction equipment of the present invention:

[0063] In Embodiment 1 of the connecting passage construction equipment of the present invention, the chainsaw 102 of the tunneling device adopts a dual drive box. In this embodiment, the drive box is only installed on the starting side frame, and the chainsaw is driven by a single drive box to perform sawing operations.

[0064] Embodiment 4 of the communication channel construction equipment of the present invention:

[0065] In Embodiment 1 of the connecting passage construction equipment of the present invention, a spray pipe and corresponding nozzles are arranged on the chainsaw 102. In this embodiment, the aforementioned spray pipe and nozzles are omitted, and the excavated portion of the chainsaw is protected by spraying grout through a separately provided follow-up spray pipe.

[0066] Embodiment 5 of the communication channel construction equipment of the present invention:

[0067] In Embodiment 1 of the connecting passage construction equipment of the present invention, the position conversion mechanism includes a moving mechanism, a lifting mechanism, and a rotating mechanism. The rotating arm is a telescopic arm, thus allowing for the excavation of the outer contour of connecting passages with various cross-sectional shapes through their coordinated operation. In this embodiment, the position conversion mechanism only uses a rotating telescopic arm, which can be used for excavating connecting passages with circular cross-sections.

Claims

1. A method for constructing a connecting passage, characterized in that, The method includes the following steps: 1) At the location of the connecting passage to be excavated, a through-hole is constructed between the two main tunnels to connect them; 2) At both ends of the through-hole, the outer contour of the connecting passage is cut out using a sawing tool in the through-hole. During the process of cutting out the outer contour of the connecting passage, support components are filled into the cut portion while sawing until the outer contour of the connecting passage is cut out; 3) The soil inside the outer contour is cleared. The support component mentioned in step 2) is a precast lining. The precast lining is pushed inward from the end of the connecting passage to fill the support component. Adjacent precast linings in the length direction of the connecting passage are connected by socket connectors.

2. The method for constructing a connecting passage according to claim 1, characterized in that, In step 2), the sawing tool used is a chainsaw. One end of the precast lining is connected to the chainsaw by a rope. The chainsaw rotates to move the precast lining from the starting side to the receiving side, so as to realize the filling of the support component.

3. The construction method for the connecting passage according to claim 1, characterized in that, In step 1), the channel is made using a chainsaw with progressively longer extensions. After the channel is made, the chainsaw is used directly as the sawing tool in step 2).

4. The construction method for the connecting passage according to claim 2, characterized in that, Before the precast lining in the next cut section of the duct is assembled, a certain distance is maintained from the precast lining that has been filled in the previous cut section of the duct. After the precast lining of the next section of the duct is assembled in place, the ropes are adjusted to descend uniformly and are aligned with the corresponding sockets for splicing.

5. A tunnel construction device for implementing the tunnel construction method as described in claim 1, characterized in that, The system includes a starting-side frame and a receiving-side frame located in the starting-side main tunnel and the receiving-side main tunnel, and a tunneling device for constructing the outline of the connecting passage. The starting-side frame and the receiving-side frame are each equipped with a position-changing mechanism. Each position-changing mechanism includes a mounting base capable of moving along the outline trajectory of the connecting passage. The tunneling device includes a drive box and a perforating component that can pass through the soil between the starting-side main tunnel and the receiving-side main tunnel. The perforating component is an extendable chainsaw and also constitutes the sawing component. The tunneling device can be connected between the connecting seats of the starting-side frame and the receiving-side frame to saw out the outline of the connecting passage under the drive of the position-changing mechanism. The position-changing mechanism includes an X-axis moving mechanism, a Z-axis lifting mechanism, and a rotating arm capable of rotating in the XZ plane. The mounting base is located on the rotating arm, wherein the X-axis is the extension direction of the main tunnel.

6. The construction equipment for the connecting passage according to claim 5, characterized in that, The sawing component is a chainsaw, and corresponding drive boxes are respectively provided on the mounting bases on the starting side frame and the receiving side frame, with the two ends of the chainsaw connected to the two drive boxes respectively.

7. The construction equipment for the connecting passage according to claim 5, characterized in that, The mounting base is equipped with a sliding mechanism for driving the drive box to move back and forth to continue extending the chainsaw.

8. The construction equipment for connecting passages according to claim 6 or 7, characterized in that, The chainsaw is equipped with nozzles for spraying grout into the exposed soil after sawing.

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