A construction method for a communication channel

Abstract

The present invention discloses a communication channel construction method, which relates to the technical field of building construction. The communication channel construction method utilizes a full-rotation drilling rig system to drill multiple steel sleeves from the first pipe segment to the second pipe segment in sequence, and then removes the slag in the steel sleeve, and uses the inner space of the multiple steel sleeves as a communication channel. Since the steel sleeve is drilled into the slag, the slag in the steel sleeve can be used as a support for the steel sleeve, which reduces the construction difficulty of the communication channel and simplifies the construction steps, effectively improves the construction efficiency of the communication channel, and thus shortens the construction period. An air cushion chamber is connected in the steel sleeve, so that when the first section of the steel sleeve breaks the first pipe segment, the pressure in the steel sleeve maintains a balanced state with the water and soil pressure outside the first pipe segment, thereby preventing water and soil collapse accidents; during the cutting process, the air pressure in the cavity part of the steel sleeve is kept in pressure balance with the water and soil pressure in the steel sleeve through the air cushion chamber, which is conducive to ensuring construction safety.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a communication channel construction method. Background Art

[0002] Current status of communication channel technology:

[0003] At present, the connection channel is generally excavated by mining method, and the excavation range is reinforced by freezing method, ground reinforcement and other methods.

[0004] This construction method has the following safety hazards:

[0005] ① If a sand layer is encountered, it is easy to cause the soil near the hole to be unstable, resulting in inadequate freezing and pouring, and the freezing effect is not ideal. The sand layer is exactly the geological environment that is often encountered;

[0006] ②The freezing range is difficult to control, which can easily lead to waste of resources and uneven freezing effect;

[0007] ③ The freezing process will cause the soil to expand, resulting in the ground rising, while the thawing process will cause the soil to sink and last for a long time, which can easily lead to soil instability;

[0008] ④ The settlement of soil after thawing can easily cause the pressure on the shaft or tunnel wall to become larger or uneven, and there will be more construction joints, which can easily cause water seepage and other forms of leakage;

[0009] ⑤ When the freezing pipe is within the range of the water collection well, freezing needs to be suspended when digging the water collection well. Due to the good creep property of frozen soil, the frozen soil curtain failure line will have a relatively large creep process, and the safety of the frozen soil will be relatively poor;

[0010] The trend of underground tunneling technology development is to use shield tunneling and other fully mechanical technologies to replace mining excavation. However, conventional shield tunneling requires the redesign and manufacture of shield machines according to the strata, and supporting infrastructure for construction needs to be provided before excavation, which is costly and time-consuming. Summary of the invention

[0011] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a communication channel construction method that can solve the problem of long construction period of current excavation equipment.

[0012] The communication channel construction method of the embodiment of the present invention comprises the following steps: chiseling away the concrete on the surface of the first pipe segment, fixing the portal sleeve sealing device to the first pipe segment, and pouring concrete on the outer ring of the portal sleeve sealing device for reinforcement; installing the rear reaction frame and the thrust system, the full-rotation drilling system and the connecting air cushion chamber; sequentially placing the first section steel sleeve, the second section steel sleeve and the third section steel sleeve into the full-rotation drilling system; connecting the air cushion chamber to the tail end of the third section steel sleeve so that the internal pressure of the third section steel sleeve maintains a balanced state with the water and soil pressure outside the pipe segment; starting the full-rotation drilling system, using the first section steel sleeve to drill through the pipe wall of the first pipe segment, and drilling the first section steel sleeve to a predetermined position; retracting the full-rotation drilling system, fixing the front end of the first section steel sleeve to the tail end of the second section steel sleeve; starting the full-rotation drilling system again, driving the second section steel sleeve and the first steel sleeve to dig forward; repeating the above steps until connecting with the second pipe segment.

[0013] According to an embodiment of the present invention, the portal sleeve sealing device includes a circular steel cylinder, which is arranged on the first section of the steel sleeve and fixedly connected to the pipe wall of the first pipe segment. The circular steel cylinder is provided with a grouting port. When the full-rotation drilling rig system stops working, slurry is injected into the gap between the outer walls of the second section of the steel sleeve and the third section of the steel sleeve.

[0014] According to an embodiment of the present invention, the slurry mix ratio is: sand 600kg / m 3 , cement 120kg / m 3 , bentonite 50kg / m 3 、Coal fly ash 500kg / m 3 and water 450kg / m 3 .

[0015] According to an embodiment of the present invention, the portal sleeve sealing device comprises a first sealing brush and a second sealing brush, the first sealing brush and the second sealing brush are arranged at intervals on the inner wall of the circular steel cylinder, and grease is injected between the first sealing brush and the second sealing brush.

[0016] According to an embodiment of the present invention, the full-rotation drilling rig system includes a clamping cylinder and a clamping block, the clamping cylinder is used to drive the clamping block to extend or retract, and the first section steel sleeve, the second section steel sleeve and the third section steel sleeve are all located within the formation range of the clamping block.

[0017] According to an embodiment of the present invention, the thrust system comprises a stepping cylinder, one end of which is fixed on a reaction frame, and the other end of which is fixed on the full-rotation drilling rig system.

[0018] According to an embodiment of the present invention, the thrust system further comprises a supporting oil cylinder, one end of which is supported on the pipe wall of the first pipe segment, and the other end of which is used to support the air cushion chamber.

[0019] According to an embodiment of the present invention, a blade is provided at the front end of the first steel sleeve.

[0020] According to an embodiment of the present invention, when cleaning the soil in the first steel sleeve, the second steel sleeve and the third steel sleeve, the connection between the first steel sleeve and the second steel sleeve and between the second steel sleeve and the third steel sleeve is reinforced at the same time.

[0021] According to an embodiment of the present invention, a fixed anti-collapse device is arranged in the second pipe segment opposite to the first pipe segment, and the fixed anti-collapse device includes a support plate, a support rod and a support pad. The support plate is arranged on the extension line of the communication channel, and the support pad is fixed on the second pipe segment. One end of the support rod is fixed on the support pad, and the other end of the support rod is used to support the support plate.

[0022] The communication channel construction method of the embodiment of the present invention has at least the following beneficial effects: using a full-rotation drilling rig system to drill multiple steel sleeves from the first pipe segment to the second pipe segment in sequence, and then removing the slag in the steel sleeve, and using the inner space of the multiple steel sleeves as the communication channel. Since the steel sleeve is drilled into the slag, the slag in the steel sleeve can be used as a support for the steel sleeve, which reduces the construction difficulty of the communication channel and simplifies the construction steps, effectively improves the construction efficiency of the communication channel, and thus shortens the construction period. An air cushion chamber is connected in the steel sleeve, so that when the first section of the steel sleeve breaks the first pipe segment, the pressure in the steel sleeve maintains a balanced state with the water and soil pressure outside the first pipe segment; during the cutting process, the pressure in the steel sleeve is maintained by the external air cushion chamber to keep the air pressure of the cavity part in the steel sleeve and the water and soil pressure in the steel sleeve in a pressure balance, thereby effectively avoiding the collapse of water and soil in the steel sleeve and causing construction accidents, which is conducive to ensuring construction safety.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 It is a right side schematic diagram of a full-rotation drilling rig system in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the installation of various devices before construction in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the first section of steel sleeve drilling in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the second section of steel sleeve drilling in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the third section of steel sleeve drilling in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the communication channel being drilled in an embodiment of the present invention.

[0031] Reference numerals:

[0032] The first pipe segment 1, the reaction frame 11, the supporting cylinder 121, the grouting equipment 15, the full-rotation drilling system 13, the stepping cylinder 131, the clamping cylinder 132, the roller 133, the first section of the steel sleeve 21, the second section of the steel sleeve 22, the third section of the steel sleeve 23, the air cushion chamber 141, the air compressor 142, the blade 211, the concrete layer 151, the support plate 161, the support pad 162, and the support rod 163. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0038] See also Figures 1 to 6 The communication channel construction method of the embodiment of the present invention comprises the following steps:

[0039] Equipment installation phase:

[0040] After measuring and positioning, the concrete on the surface of the first pipe segment 1 is chiseled off, the portal sleeve sealing device is fixedly connected to the first pipe segment 1, and concrete is poured around the outer ring of the portal sleeve sealing device for reinforcement.

[0041] Among them, the portal sleeve sealing device includes a circular steel cylinder, which is sleeved on the first section steel sleeve 21 and fixedly connected to the pipe wall of the first pipe segment 1. The circular steel cylinder is provided with a grouting port to facilitate the grouting equipment 15 to grout and reinforce the gap on the back of the steel sleeve.

[0042] The portal sleeve sealing device includes a first sealing brush and a second sealing brush, which are arranged at intervals on the inner wall of the circular steel cylinder. A grease bin is formed between the first sealing brush, the second sealing brush, the circular cylinder and the steel sleeve. Grease is injected into the grease bin until grease overflows and the pressure change is observed. Confirm that the portal sleeve sealing device is fastened to the tunnel segment and there is no leakage.

[0043] Install the rear reaction frame 11 and the thrust system and the full-rotation drilling rig system 13.

[0044] The first section of the steel sleeve 21, the second section of the steel sleeve 22 and the third section of the steel sleeve 23 are sequentially placed in the full-rotation drilling system 13. Specifically, a roller 133 is provided at the bottom of the full-rotation drilling system, and a guide rail is laid in the first pipe segment 1. The guide rail and the roller 133 are rollingly connected to facilitate the stepping movement of the full-rotation drilling system 13. The full-rotation drilling system 13 includes a clamping cylinder 132 and a clamping block. The clamping cylinder 132 is used to drive the clamping block to extend or retract. The first section of the steel sleeve 21, the second section of the steel sleeve 22 and the third section of the steel sleeve 23 are all located within the formation range of the clamping block. The blade 211 is installed at the front end of the first section of the steel sleeve 21 by a steel sleeve crane, and the first section of the steel sleeve 21 is placed in the full-rotation drilling system 13. Start the pump station to drive the clamping cylinder 132 inside the full-rotation drilling system 13 to move: the clamping cylinder 132 contracts, the lifting layer of the full-rotation drilling system 13 descends, and the clamping block is driven to approach the steel sleeve and finally clamped. After clamping the steel sleeve, the steel sleeve can be driven to rotate by the full-rotation drilling system 13, and the clamping and loosening of the steel sleeve can be controlled by controlling the extension and retraction of the clamping cylinder 132. Then install the second section of the steel sleeve 22 and the third section of the steel sleeve 23 according to the above steps.

[0045] The thrust system includes a stepping cylinder 131, one end of which is fixed to the reaction frame 11, and the other end of which is fixed to the full-rotation drilling system 13. The thrust system also includes a supporting cylinder 121, one end of which is supported on the pipe wall of the first pipe segment 1, and the other end of which is used to support the air cushion chamber 141.

[0046] Initial stage:

[0047] The air cushion chamber 141 is connected to the tail end of the third steel sleeve 23, so that the pressure inside the third steel sleeve 23 is balanced with the water and soil pressure outside the pipe segment. The air cushion chamber 141 is connected to the steel plate at the tail end of the third steel sleeve 23, and the air cushion chamber 141 is connected to the third steel sleeve 23. Mud is provided in the air cushion chamber 141, and necessary space is reserved to store air. The air cushion chamber 141 is equipped with a liquid level gauge, a safety valve and a pressure gauge to monitor the liquid level and pressure in the air cushion chamber 141 to ensure the safe operation of the air cushion chamber 141. The air cushion chamber 141 is connected to an air compressor 142, and the air compressor 142 is used to supplement the air pressure of the air cushion chamber 141 to ensure that the air pressure and water and soil pressure in the steel sleeve are maintained in a balanced state, thereby effectively avoiding water and soil collapse in the steel sleeve, causing the steel sleeve to lose the support of water and soil and then cause a safety accident.

[0048] By connecting the air cushion chamber 141 to the steel sleeve and establishing pressure inside the steel sleeve, when the first section of the steel sleeve 21 breaks the first pipe segment 1, the pressure inside the first section of the steel sleeve 21 is balanced with the water and soil pressure outside the first pipe segment 1. During the cutting process, the pressure inside the steel sleeve is kept balanced by the external air cushion chamber 141.

[0049] It should be understood that the steel plate at the rear end of the third steel sleeve 23 is sealed to the third steel sleeve 23, and the steel plate, steel sleeve, first sealing brush, second sealing brush and slag form a sealed space to ensure the sealing performance inside the steel sleeve.

[0050] The full-rotation drilling system 13 is started, and the first steel sleeve 21 is used to drill through the pipe wall of the first pipe segment 1, and the first steel sleeve 21 is drilled to a predetermined position. A blade 211 is provided at the front end of the first steel sleeve 21.

[0051] The hydraulic motor of the full-rotation drilling system 13 is started to rotate at a low speed, and the stepping cylinder 131 of the full-rotation drilling system 13 is actuated, and cooperates with the clamping cylinder 132 to make the blade 211 at the front end of the first steel sleeve 21 pass through the two layers of sealing brushes of the tunnel portal sleeve sealing device and reach the bottom of the special first pipe segment 1, and the first steel sleeve 21 is used to drill through the tunnel pipe segment wall. The first steel sleeve 21 is clamped and rotated forward by the full-rotation drilling system 13, and the first steel sleeve 21 is drilled into the expected position, and a welding working space is reserved with the second steel sleeve 22 to facilitate the connection work of the first steel sleeve 21 and the second steel sleeve 22.

[0052] Step change phase:

[0053] The full-rotation drilling system 13 is retracted, and the front end of the first steel sleeve 21 is fixedly connected to the rear end of the second steel sleeve 22 .

[0054] The full-rotation drilling system 13 is retracted, and the first steel sleeve 21 and the second steel sleeve 22 are welded, and the force is transmitted to the first steel sleeve 21 through the rotation of the second steel sleeve 22. When drilling, the grease in the grease bin of the hole door sleeve sealing device needs to be supplemented first.

[0055] The full-rotation drilling system 13 is started again, driving the second steel sleeve 22 and the first steel sleeve to dig forward.

[0056] Start the drilling rig hydraulic motor, rotate it at low speed, and the stepping cylinder 131 of the full-rotation drilling rig system 13 is actuated to cooperate with the clamping cylinder 132 to drive the second section steel sleeve 22 and the first section steel sleeve 21 to dig forward, stop at the designed position, and shut down the drilling rig.

[0057] Arrival stage:

[0058] Repeat the above steps until the second pipe segment is connected. Continue to start the full-rotation drilling system 13 stepping until the blade 211 at the front end of the first steel sleeve 21 drills through the pipe wall of the second pipe segment in the arrival area.

[0059] A fixed anti-collapse device is provided in the second pipe segment opposite to the first pipe segment 1, and the fixed anti-collapse device includes a support plate 161, a support rod 163 and a support pad 162. The support plate 161 is provided on the extension line of the communication channel, the support pad 162 is fixed on the second pipe segment, one end of the support rod 163 is fixed on the support pad 162, and the other end of the support rod 163 is used to resist the support plate 161. Since the support plate 161 is provided in the stepping direction of the full-rotation drilling rig system 13, the provision of the support plate 161 can prevent the mud and the like in the communication channel from leaking into the working area, causing dangers such as landslides.

[0060] After the full-rotation drilling machine stops working, the slurry is injected into the gaps between the outer walls of the second steel sleeve 22 and the third steel sleeve 23. In this embodiment, the slurry has a mixing ratio of: sand 600kg / m 3 , cement 120kg / m 3 , bentonite 50kg / m 3 、Coal fly ash 500kg / m 3 and water 450kg / m 3 , the gap outside the steel sleeve is filled with slurry to form a concrete layer 151, thereby reinforcing the communication channel.

[0061] After the slurry solidifies, the portal sleeve sealing device is removed, and the reaction frame 11 and thrust system, full-rotation drilling rig system 13, steel sleeve support frame, guide rails, air cushion chamber 141 and other facilities are removed.

[0062] Excavation of soil:

[0063] When excavating the slag, first open the steel plate at the rear end of the third steel sleeve 23, and the staff enters the communication channel to discharge the slag. During the slag discharge process, the connection between the two adjacent steel sleeves is reinforced to ensure that the overlap of the steel sleeves is watertight to ensure the safety of the communication channel. After the slag in the steel sleeve is cleaned, the communication channel is connected, and the sealing devices such as the support plate 161 of the arrival area are removed.

[0064] The present invention discloses a method for constructing a communication channel, which solves the problems of long construction period, large resource consumption, and high cost of current excavation equipment. In this method, the steel sleeve is clamped and pushed forward by a rotary drilling system, and the steel sleeve is excavated forward. After the excavation of the first section of the steel sleeve 21 is completed, the connection of the steel sleeve is completed by welding. At this time, the rotary drilling system acts on the second section of the steel sleeve 22, clamps and pushes. The second section of the steel sleeve 22 transmits the force to the first section of the steel sleeve 21, so the first and second sections of the steel sleeve are excavated forward at the same time. By analogy, the third section of the steel sleeve 23 arrives smoothly in the arrival area of ​​another tunnel after the excavation is completed, and the excavation work of the steel sleeve is completed. The rear end steel plate of the third section of the steel sleeve 23 is opened and the slag in the steel sleeve is cleaned. At the same time, the connection between the two adjacent sections of the steel sleeve is reinforced by welding, and finally the construction of the communication channel lining is completed.

[0065] The communication channel construction method of the embodiment of the present invention can be constructed without reinforcing the stratum, is less affected by factors such as weather and temperature, has high safety performance, and can adapt to different stratum address conditions. By using the full-rotation drilling rig system 13 to drill multiple sections of steel sleeves from the first pipe segment 1 to the second pipe segment in sequence, and then remove the slag in the steel sleeve, the space inside the multiple sections of the steel sleeve is used as a communication channel. Since the steel sleeve is drilled into the slag, the slag in the steel sleeve can serve as a support for the steel sleeve, which reduces the construction difficulty of the communication channel and simplifies the construction steps, thereby effectively improving the construction efficiency of the communication channel and shortening the construction period. An air cushion chamber 141 is connected inside the steel sleeve so that when the first section of the steel sleeve 21 breaks the first pipe segment 1, the pressure inside the steel sleeve maintains a balanced state with the water and soil pressure outside the first pipe segment 1; during the cutting process, the pressure inside the steel sleeve is maintained in a pressure balance between the cavity part inside the steel sleeve and the water and soil pressure inside the steel sleeve through the external air cushion chamber 141, thereby effectively avoiding the collapse of water and soil in the steel sleeve and causing construction accidents, which is conducive to ensuring construction safety.

[0066] It should be noted that the "steel sleeve" described in the embodiment includes a first steel sleeve 21, a second steel sleeve 22 and a third steel sleeve 23. The first segment 1 and the second segment 2 are both located in tunnels, and the communication channel is used to connect the first segment 1 and the second segment 2.

[0067] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A communication channel construction method, characterized in that: The steps include: Chisel away the concrete on the surface of the first pipe segment, and fix the portal sleeve sealing device to the first pipe segment, wherein the portal sleeve sealing device comprises a circular steel cylinder and at least one sealing brush, wherein the circular steel cylinder is sleeved on the first section of the steel sleeve and fixedly connected to the pipe wall of the first pipe segment, wherein the circular steel cylinder is provided with a grouting port, and the sealing brush is provided on the inner wall of the circular steel cylinder to form a grease bin, and concrete is poured on the outer ring of the portal sleeve sealing device for reinforcement; Install the rear reaction frame and thrust system, full-rotation drilling system and connect the air cushion chamber; Place the first section of steel sleeve, the second section of steel sleeve and the third section of steel sleeve into the full-rotation drilling rig system in sequence; Connect the air cushion chamber to the tail end of the third steel sleeve so that the pressure inside the third steel sleeve is in balance with the water and soil pressure outside the segment; The full-rotation drilling system is started, and the first section of the steel sleeve is used to drill through the pipe wall of the first pipe segment, and the first section of the steel sleeve is drilled to a predetermined position; Retract the full-rotation drilling system and fix the front end of the first steel sleeve to the rear end of the second steel sleeve; Start the full-rotation drilling system again, driving the second steel sleeve and the first steel sleeve to dig forward; Repeat the above steps until it is connected to the second pipe segment.

2. The communication channel construction method according to claim 1, characterized in that: The portal sleeve sealing device includes a circular steel cylinder, which is sleeved on the first section of the steel sleeve and fixedly connected to the pipe wall of the first pipe segment. The circular steel cylinder is provided with a grouting port. When the full-rotation drilling rig system stops working, slurry is injected into the gaps between the outer walls of the second section of the steel sleeve and the third section of the steel sleeve.

3. The communication channel construction method according to claim 2, characterized in that: The slurry mix ratio is: sand 600kg / m 3 , cement 120kg / m 3 , bentonite 50kg / m 3 、Coal fly ash 500kg / m 3 and water 450kg / m 3 .

4. The communication channel construction method according to claim 2, characterized in that: The portal sleeve sealing device comprises a first sealing brush and a second sealing brush. The first sealing brush and the second sealing brush are arranged at intervals on the inner wall of the circular steel cylinder, and grease is injected between the first sealing brush and the second sealing brush.

5. The communication channel construction method according to claim 1, characterized in that: The full-rotation drilling system includes a clamping cylinder and a clamping block. The clamping cylinder is used to drive the clamping block to extend or retract. The first steel sleeve, the second steel sleeve and the third steel sleeve are all located within the formation range of the clamping block.

6. The communication channel construction method according to claim 1, characterized in that: The thrust system comprises a stepping oil cylinder, one end of which is fixed on a reaction frame, and the other end of which is fixed on the full-rotation drilling rig system.

7. The communication channel construction method according to claim 6, characterized in that: The thrust system further comprises a supporting oil cylinder, one end of which is supported on the pipe wall of the first pipe segment, and the other end of which is used to support the air cushion chamber.

8. The communication channel construction method according to claim 1, characterized in that: A blade is arranged at the front end of the first steel sleeve.

9. The communication channel construction method according to claim 1, characterized in that: When cleaning the soil in the first steel sleeve, the second steel sleeve and the third steel sleeve, the connection between the first steel sleeve and the second steel sleeve and between the second steel sleeve and the third steel sleeve is reinforced at the same time.

10. The communication channel construction method according to claim 1, characterized in that: A fixed anti-collapse device is arranged in the second pipe segment opposite to the first pipe segment, and the fixed anti-collapse device includes a support plate, a support rod and a support pad. The support plate is arranged on the extension line of the communication channel, and the support pad is fixed on the second pipe segment. One end of the support rod is fixed on the support pad, and the other end of the support rod is used to support the support plate.

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