JP7236506B2 - Top-down Pipe Propulsion Construction Vertical Shaft Launching Device in Shield Tunnel and Construction Method Therefor - Google Patents

Description

The present invention belongs to the field of tunnel shield construction technology, and more particularly to a top-down pipe propulsion construction shaft launching device and construction method thereof in a shield tunnel.

Currently, there are several examples of shield tunnel connecting passages excavated by mechanized construction methods in Japan, and mechanization of pump room construction is also on the schedule, but the construction space for pump rooms that adopt integrated construction mode is narrow, so mechanized construction methods are being deployed. Therefore, we proposed a construction method to release the non-passage function of the connecting passage and combine the structure of the pump room with the structure of the main tunnel. A shaft starting device is required and will be used as the structure of the pump room after the pipe propulsion construction is completed.

The following five known technical proposals are closest to the present invention.
(1) Chinese Patent CN201710720358.5: A method for starting a vertical shaft for prefabricated secondary lining equipment for underground excavation tunnels belonging to the field of track traffic construction construction technology, wherein the equipment transfer system comprises a crawler chassis, a vehicle body, A launch method comprising a robotic arm, an erector, an ancillary trailer and associated equipment, a locomotive, a pebble transport vehicle, a segment, and a pebble tank. This facility will allow assembly machines to launch from the shafts and quickly assemble the secondary lining segments, increasing the level of mechanization and automation of subway construction. The equipment is used for assembling and launching the vertical shaft of the subway, carrying each component of the equipment to the vertical shaft and the side passage in order through the crane, assembling them according to the components, and starting the tunnel section for the secondary lining assembly work. expand.

(2) Chinese patent CN202010064783.5: A construction method for starting a single shaft for changing a mining tunnel to a shield tunnel, in which after the starting shaft is dug to a predetermined depth, the starting shaft and the underground excavation tunnel are communicated. Step S1 to remove the outer peripheral body between the starting shaft and the existing underground excavation tunnel, and add an extension platform to the end of the existing upper platform of the shield machine truck at the last section, Step S2 of extending the attached belt conveyor to the extension platform, Step S3 of sequentially suspending the multi-section shield machine cart and shield machine body into the launch shaft, and a small gate for transporting material in the underground tunnel. After the step S4 of assembling the type crane device, installing the multi-joint shield machine cart and the main equipment of the shield machine, and completing the debugging of the main equipment of the shield machine, the shield machine is started. A construction method including step S5 in which the surplus soil is carried out from the tunnel. According to this method, the problem of assembling the shield machine in the tunnel and the problem of transporting the surplus soil from the construction of the starting section and the transportation of materials can be solved, and the shield machine can be started smoothly as planned.

(3) Chinese Patent CN201520043315.4: A water stop structure for a tube propulsion start tunnel, comprising a water stop rubber ring surrounding the inner wall of the tunnel and an elastic structural member. The elastic structural member is positioned between the portal inner wall and the water stop rubber ring, and one end protruding into the portal on the water stop rubber ring is held by an adjustable pressure plate pressed to the outside of the water stop rubber ring. Fixed. The tube propulsion start tunnel water stop structure is composed of a water stop rubber ring and an elastic structural member installed around the inner wall of the tunnel. , a waterproof rubber ring and an elastic structural member can be used for sealing, and the elastic structural member can be adjusted according to the operating state of the pipe propulsion device to always ensure a sealed state between the inner wall of the tunnel and the pipe. be able to. INDUSTRIAL APPLICABILITY This invention is used in the field of non-open-cut buried pipe construction.

(4) Chinese patent CN201811004159.5: Tube propulsion launch frame support system and method for constructing tunnel access, wherein the support system is fixed at the bottom of the launch frame and telescopically adjustable bottom support structure and a telescopically adjustable top support structure fixed to the top of the starting frame, and a telescopically adjustable side support structure fixedly mounted on the starting frame on the side away from the construction target connecting passage, and a bottom , a support system for telescopically adjusting the top and side support structures to support the bottom, top and side support structures within the main tunnel, and for supporting the launch frame within the main tunnel; and Method. The starting frame is installed with a support system, which has the advantages of quick and convenient installation and dismantling, can meet the needs of functionality and structural stability of the narrow tunnel connecting passage, and eliminates security risks during construction. can be reduced and construction efficiency can be improved.

(5) A tube support and tube propulsion system for constructing a tunnel connecting passage, comprising a launch frame having opposed front and rear sides, and at the rear, top and bottom of said launch frame, said launch A tube support and tube propulsion system comprising a support device for supporting a frame within the main tunnel. A figurine space is provided inside the launch frame, the support device is telescopically adjustable to support the support device on corresponding sides, tops and bottoms on the main tunnel, and the figurine The starting frame is supported in the main tunnel by making the space correspond to the design position of the connecting passage to be constructed. The tube support and propulsion system can be transported into or out of the main tunnel as a whole, realizing convenient installation and dismantling and shortening the construction time. . The construction cycle can be effectively shortened by supporting and fixing the starting frame with the telescopically adjustable supporting device.

One of the drawbacks of conventional tube propulsion shaft launchers is that the direction of propulsion of the launcher can only lie on a horizontal axis and cannot achieve top-down vertical tube propulsion. Another is that due to the particularity of jacking construction in shield tunnels, greater emphasis needs to be given to the protection of the segments around the shaft to prevent damage to the shield segments.

The object of the present invention is to solve the problem that the conventional launching device has a tube propulsion direction that can only be positioned on the horizontal axis and cannot achieve top-down vertical tube propulsion, and that the jacking method construction is carried out in the shield tunnel. Top-down pipe propulsion construction shaft launcher in shield tunnels to solve the technical problem that, due to its specificity, it is necessary to emphasize protection to the segments around the shaft to prevent damage to the shield segments and It is to provide the construction method.

In order to achieve the above objects, the technical solutions used by the present invention are as follows.
A top-down tube propulsion construction shaft launching apparatus in a shield tunnel of the present invention comprises a trolley, a reaction frame, a guide rail, a recoverable tube propulsion body, and a longitudinal hydraulic cylinder. there is The vertical shaft is located below the tunnel, the guide rails are laid at the bottom of the tunnel and are located on both left and right sides of the vertical shaft to be constructed, the reaction frame is installed on the guide rails, and Located above the shaft, the retrievable tube thruster body is connected to the top lower portion of the reaction frame and longitudinally corresponds to the shaft, the outer cutter bit of the retrievable tube thruster body is downwardly The auxiliary truck is attached to the guide rail and positioned in front of the shaft, and a mud suction device and a slurry treatment device are mounted on the truck, and the mud suction device and the shaft are installed. A first mud pipe for sucking the mud in the vertical shaft is connected between them, and a first pipe for transporting the mud to the mud water treatment device and treating it is connected between the mud water treatment device and the mud suction device. 2 mud pipes are connected, said longitudinal hydraulic cylinders are a set and are connected to the top of the reaction force frame at intervals along the circumference, and a set of longitudinal hydraulic cylinders corresponds to the sidewall of the shaft.

Preferably, a mounting seat is provided at a top portion of the reaction frame and at a connection position corresponding to the recoverable pipe propulsion machine body, and a lifting tool is hung on the mounting seat so that the recoverable The pipe propulsion machine main body is connected to the mounting seat via a lifting tool.

Preferably, the reaction frame includes two pedestals provided on both front and rear sides of the vertical shaft, four pillars provided in a matrix on the two pedestals, and between the vertical pillars corresponding to each other. Two longitudinal beams are connected to each other, rollers are provided at the bottom of the pedestal, and horizontal beams are provided at intervals between the two longitudinal beams.

A method of constructing a top-down pipe propulsion construction shaft launcher in said shield tunnel comprising the following steps.
Step 1): Transport the reaction frame and the accompanying trolley to the position of the shaft to be constructed, and adjust the initial position.
Step 2): Remove the guide rails at the bottom of the recoverable tube propulsor body, cover the outside of the shaft with a steel sleeve tube, connect the bottom of the steel sleeve tube to the tunnel segment around the shaft, and use the recoverable Fill tail grease between the brushes at the bottom of the tube propulsion unit to prepare for departure.
Step 3): suspending the retrievable tube propulsion body into the steel sleeve tube via the lifting tool, painting the inner wall of the steel sleeve tube with a brush, and at the same time the bottom of the retrievable tube propulsion body to make contact with the tunnel segment at the end of the shaft.
Step 4): Excavating the tunnel segment where the shaft is located using the cutter head of the retrievable tube propulsor body.
Step 5): Lifting the tunnel segment where the shaft is located to the truck via lifting tools to complete preparation for excavation.
Step 6): excavating the vertical shaft using the recoverable pipe propulsion machine main body, extracting the muddy water in the vertical shaft with the muddy water suction device, and treating the muddy water extracted with the muddy water processing device.
Step 7): Once excavated to 5m, the side wall segments of the shaft are propelled by longitudinal hydraulic cylinders.
Step 8): Repeat the process of steps 6) to 7) until the shaft construction is completed.

Preferably, the tunnel segment includes a normal steel-concrete composite segment and a special steel-concrete composite segment, wherein the normal steel-concrete composite segment comprises an upper first normal concrete segment unit and a lower first steel plate segment. annularly spliced from the unit, the longitudinal section of the first ordinary concrete segment unit exhibits an arc shape, the corresponding central angle of the first ordinary concrete segment unit is greater than 180° and less than 270°; The longitudinal section of the first steel plate segment unit has an arc shape and is connected to the bottom of the first plain concrete segment unit, and the special steel-concrete composite segment has an arc shape and is used for the shaft in the tunnel. said special steel-concrete composite segment comprises an upper second plain concrete segment unit, a lower glass fiber reinforced concrete segment unit and a second steel plate segment unit, said second plain The longitudinal cross-section of the concrete segment unit exhibits an arc shape, the corresponding central angle of the second ordinary concrete segment unit is greater than 180° and less than 270°, and the longitudinal cross-section of the glass fiber reinforced concrete segment unit has an arc shape, is provided at the bottom of the second ordinary concrete segment unit, and maintains a certain distance between the lower end of the second ordinary concrete segment unit and the upper end of the glass fiber reinforced concrete segment unit. , said second steel plate segment unit is connected between a second plain concrete segment unit and a glass fiber reinforced concrete segment unit.

Preferably, the recoverable tube propulsion body excavation method in step 6 includes using the hoisting tool to lower the recoverable tube propulsion body to a circular excavation target area on a predetermined special steel-concrete composite segment. It is to propel the retrievable pipe propulsion machine body through the force frame to excavate downward and complete the excavation construction of the shaft.

Preferably, the diameter of the tunnel segment excavated by the cutterhead of said recoverable tube propeller body is at least 20 cm greater than the diameter of the shaft.

Preferably, the muddy water treatment device treats the muddy water into earth and sand, and then carries the muddy water out via an accompanying cart.

The present invention has the following advantages and beneficial effects compared with the prior art.
1. The vertical shaft starting device for top-down pipe propulsion construction in a shield tunnel and its construction method according to the present invention comprises an ancillary trolley, a reaction frame, and a guide rail. By transporting the frame and the retrievable tube propulsion body into the main tunnel, it is possible to facilitate the installation and dismantling of the shaft launching device, greatly saving the construction time, and for the construction of the subsequent pump room structure. Prerequisite.

2. The present invention first dismantles a part of the special steel-concrete composite segment located in the guide rail and shaft of the retrievable tube propulsion machine body, and then welds the steel sleeve tube to the second steel plate segment unit. Once connected, the side wall segments of the shaft can be driven from top to bottom to a predetermined depth. In the progress of excavation, construction can be promoted only by excavating a pre-designed area without dismantling the entire special steel-concrete composite segment. structure can be effectively protected.

3. Technical improvement: The special steel-concrete composite segment around the shaft of the present invention is composed of three types of segments: the second ordinary concrete segment unit, the lower glass fiber reinforced concrete segment unit, and the second steel plate segment unit, A glass fiber reinforced concrete segment unit is installed at the bottom of the main tunnel, ie at the top of the shaft body structure, to facilitate excavation. In addition, according to the present invention, the pipe propulsion construction shaft starting device can be flexibly transported to a designated position in the tunnel, solving the problem of the construction method of the subsidence shaft structure in the main tunnel, and via the reaction frame. As well as starting from the top to the bottom of the recoverable pipe propulsion machine body and the pipe, it was realized to effectively protect the tunnel segment around the vertical shaft.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a structural schematic diagram of a top-down tube propulsion construction shaft launching device in a shield tunnel of the present invention; FIG. FIG. 4 is a schematic side view of the structure when the recoverable pipe propulsion machine main body of the present invention is installed above a shaft to be constructed. FIG. 2 is a schematic front view of the structure when the recoverable pipe propulsion machine main body in the present invention is installed above a shaft to be constructed. FIG. 4 is a structural schematic view of the present invention when the recoverable tube propulsion body is connected to the mounting seat via a lifting tool; FIG. 4 is a structural schematic diagram of a longitudinal section of a side wall segment in the present invention; 1 is a structural schematic diagram of a carbon steel-concrete composite segment in the present invention; FIG. 1 is a structural schematic diagram of a special steel-concrete composite segment in the present invention; FIG. FIG. 3 is a structural schematic diagram of a recoverable tube propulsion machine body in the present invention;

As shown in FIGS. 1 to 8, the top-down pipe propulsion construction shaft launching apparatus in the shield tunnel of the present invention includes an ancillary truck 3, a reaction frame 4, a guide rail 5, and a recoverable pipe propulsion device. It comprises a machine body 6 and longitudinal hydraulic cylinders 7 . The vertical shaft 1 is located below the tunnel 2, the guide rails 5 are laid at the bottom of the tunnel 2 and are located on both left and right sides of the vertical shaft 1 to be constructed, and the reaction frame 4 is a guide rail. 5 and located above the shaft 1, the recoverable tube propeller body 6 is connected to the lower top of the reaction frame 4 and vertically corresponds to the shaft 1, and the recoverable The outer shield cutter of the pipe propulsion machine body 6 is provided facing downward, and the accompanying truck 3 is attached to the guide rail 5 and positioned in front of the vertical shaft 1. A mud water suction device 8 is mounted on the truck. and a muddy water treatment device 9 are attached, and a first muddy water pipe 10 for sucking muddy water in the vertical shaft 1 is connected between the muddy water suction device 8 and the shaft 1, and the muddy water treatment device 9 and the muddy water Between the suction device 8, a second mud pipe 11 is connected for conveying and treating the mud to the mud treatment device 9. Said longitudinal hydraulic cylinders 7 are one set and circumferentially Corresponding to the side walls of the shaft 1 are a set of longitudinal hydraulic cylinders 7 connected to the top of the reaction frame 4 at intervals along.

In this embodiment, a mounting seat 12 is provided at the top of the reaction frame 4 at a connection position corresponding to the recoverable pipe propulsion machine body 6, and a lifting tool 13 is hung on the mounting seat 12, The retrievable tube propulsor body 6 is connected to the mounting seat 12 via a lifting tool 13 .

In this embodiment, the reaction frame 4 comprises two pedestals 4.1 provided on both front and rear sides of the shaft 1, and four vertical pillars 4.1 provided in a matrix on the two pedestals 4.1. 2 and two longitudinal beams 4.3 respectively connected between corresponding vertical pillars 4.2, with rollers 4.5 provided at the bottom of the base 4.1, two longitudinal Cross beams 4.4 are provided at intervals between the beams 4.3.

A method of constructing a top-down pipe propulsion construction shaft launcher in said shield tunnel comprising the following steps.
Step 1): Transport the reaction frame 4 and the accompanying truck 3 to the position of the shaft 1 to be constructed, and adjust the initial position.
Step 2): Remove the guide rail 5 at the bottom of the retrievable tube propulsor body 6, cover the shaft 1 with a steel sleeve tube 16, and place the bottom of the steel sleeve tube 16 on the tunnel segment 14 around the shaft 1. and fill tail grease between the brushes at the bottom of the recoverable tube propulsion machine body 6 to prepare for starting.
Step 3): The recoverable tube propulsor body 6 is lowered to the steel sleeve tube 16 via the lifting tool 13, the inner wall of the steel sleeve tube 16 is painted with a brush, and at the same time the recoverable tube is Contacting the cutter head 6.3 at the bottom of the propulsor body 6 with the tunnel segment 14 at the end of the shaft 1;
Step 4): excavating the tunnel segment 14 located in the shaft 1 using the cutter head 6.3 of the retrievable tube propeller body 6;
Step 5): Lifting the tunnel segment 14 located in the vertical shaft 1 to the accompanying truck 3 via the lifting tool 13 to complete the preparation for excavation.
Step 6): Excavating the vertical shaft 1 using the recoverable pipe propulsion machine body 6, extracting the muddy water in the vertical shaft 1 with the muddy water suction device 8, and treating the extracted muddy water with the muddy water processing device 9. .
Step 7): Once excavated to 5m, the side wall segments 15 of the shaft 1 are propelled by the longitudinal hydraulic cylinders 7;
Step 8): Repeat the process of steps 6-7 until the construction of Shaft 1 is completed.

In this embodiment, said tunnel segment 14 includes a common steel-concrete composite segment 14.1 and a special steel-concrete composite segment 14.2, said common steel-concrete composite segment 14.1 being the upper second 1 Plain concrete segment unit 14.1.1 and the lower first steel plate segment unit 14.1.2 are connected in an annular fashion, and the longitudinal section of said first plain concrete segment unit 14.1.1 is arc-shaped. and the corresponding central angle of the first plain concrete segment unit 14.1.1 is greater than 180° and less than 270°, and the longitudinal section of said first steel plate segment unit 14.1.2 is circular Arc-shaped and connected to the bottom of the first plain concrete segment unit 14.1.1, said special steel-concrete composite segment 14.2 is arc-shaped and corresponds to shaft 1 in tunnel 2. position, said special steel-concrete composite segment 14.2 consists of a second plain concrete segment unit 14.2.1 above, a glass fiber reinforced concrete segment unit 14.2.2 below and a second steel plate segment unit 14.2.3, the longitudinal section of said second plain concrete segment unit 14.2.1 presents an arcuate shape and the corresponding center of said second plain concrete segment unit 14.2.1 With an angle greater than 180° and less than 270°, the longitudinal cross-section of said glass fiber reinforced concrete segment unit 14.2.2 presents the shape of an arc, the second plain concrete segment unit 14.2.1 Between the lower end of the second ordinary concrete segment unit 14.2.1 and the upper end of the glass fiber reinforced concrete segment unit 14.2.2 provided in the lower part, a certain distance is maintained, and the second steel plate The segment unit 14.2.3 is connected between the second plain concrete segment unit 14.2.1 and the glass fiber reinforced concrete segment unit 14.2.2.

In the present example, the lower end of said steel sleeve tube 16 is welded to the second steel plate segment unit 14.2.3.

In the present embodiment, the excavation method for the recoverable tube propulsor body 6 in step 6 is to lift the recoverable tube propulsor body 6 into a circular shape on a predetermined special steel-concrete composite segment 14.2 by the lifting tool 13. It is to hang down to the excavation target area, propel the recoverable pipe propulsion machine main body 6 through the reaction frame 4 to excavate downward, and complete the excavation construction of the vertical shaft 1 .

In the present example, the diameter of the tunnel segment 14 excavated by the cutter head 6.3 of said retrievable tube propeller body 6 is at least 20 cm larger than the diameter of the shaft 1.

In this embodiment, the muddy water treatment device 9 treats the muddy water into earth and sand, and then transports the muddy water out via the accompanying trolley 3 .

In the present embodiment, said retrievable tube propulsor body 6 is provided with an outer shield 6.1, an inner shield 6.2 and a cutter head 6.3, the outer shield of said outer shield 6.1 bit is inverted downward and connected to the inner shield 6.2 via a connecting plate 6.4 and fixed integrally, the drive is mounted above the inner shield 6.2, and the cutter head 6.3 is attached to the bottom of the retrievable tube propulsor body 6;

In this embodiment, the top of the outer shield 6.1 is provided with an extension ring 17 having a height of 500 mm and a diameter matching the diameter of the outer shield 6.1, said extension ring 17 being connected via a flange to the outer shield. 6.1, and on the top of the inner surface of the extension ring 17, when the lifting height of the tube propulsor body exceeds 1000 mm, i.e. after breaking off from the seal at the top of the outer shield 6.1, Two seals 18 are provided to maintain pressure retention.

While the present invention has been presented for purposes of illustration and description, it is not intended to be exhaustive or limited to the invention in the form disclosed, by simple variations based on the described examples. All other embodiments obtained fall within the protection scope of the present invention.

1 shaft
2 tunnels
3 Ancillary trolley
4 Reaction frame 4.1 Pedestal 4.2 Pillar 4.3 Vertical beam 4.4 Cross beam 4.5 Roller 5 Guide rail 6 Retrievable pipe propulsion machine body 6.1 Outer shield 6.2 Inner shield 6.3 Cutter Head 6.4 Connecting plate 7 Vertical hydraulic cylinder 8 Mud suction device 9 Mud treatment device 10 First mud pipe 11 Second mud pipe 12 Mounting seat 13 Lifting tool 14 Tunnel segment 14.1 Ordinary steel-concrete composite segment 14. 1.1 First ordinary concrete segment unit 14.1.2 First steel plate segment unit 14.2 Special steel-concrete composite segment 14.2.1 Second ordinary concrete segment unit 14.2.2 Lower glass fiber reinforced concrete Segment unit 14.2.3 Second steel plate segment unit 15 Side wall segment 16 Steel sleeve tube 17 Extension ring 18 Seal

Claims (1)

A method for constructing a pipe propulsion construction shaft starting device for propelling a pipe in the vertical direction in a shield tunnel extending in one direction perpendicular to the vertical direction , comprising:
The extending direction of the shield tunnel is defined as the front-rear direction, and the direction orthogonal to both the vertical direction and the front-rear direction is defined as the left-right direction,
The pipe propulsion construction vertical shaft starting device is
It comprises an ancillary carriage (3), a reaction frame (4), a guide rail (5), a pipe propulsion body (6), and a vertical hydraulic cylinder (7), wherein the pipe propulsion body (6 ) is to ensure the reaction force from the hydraulic cylinder (7),
A plurality of mounting seats (12) are provided in the center of the one direction on one surface of the reaction frame (4), and a plurality of lifting tools (13) hanging down from each of the plurality of mounting seats (12) are provided. lower ends of the plurality of lifting tools (13) are connected to respective ends of the pipe propulsion machine body (6) in the one direction,
The vertical shaft (1) is positioned below the tunnel (2) in the vertical direction , and the guide rails (5) are laid at the bottom of the tunnel (2) and are located on both left and right sides of the vertical shaft (1) to be constructed. , the reaction frame (4) is installed on the guide rail (5) and positioned above the shaft (1), and the pipe propeller body (6) is mounted on the reaction frame (4) The outer shield cutter of the pipe propeller body (6) is directed downward, the ancillary truck (3) is attached to the guide rail (5), and the vertical shaft (1 ), a muddy water suction device (8) and a muddy water treatment device (9) are attached to the upper surface of the ancillary truck (3) , and between the muddy water suction device (8) and the shaft (1) is connected to a first mud pipe (10) for sucking muddy water from the shaft (1), and muddy water is sucked between the muddy water treatment device (9) and the muddy water suction device (8). A second mud pipe (11) is connected for transport and treatment to a treatment unit (9), said longitudinal hydraulic cylinders (7) being one set and spaced apart from the reaction frame (4) connected to the top of the
The reaction frame (4) consists of two pedestals (4.1) provided on both front and rear sides of the shaft (1), and four vertical pillars (4.1) provided on the two pedestals (4.1). 4.2) and two longitudinal beams (4.3) respectively connected between corresponding vertical pillars (4.2);
a roller (4.5) is provided at the bottom of the pedestal (4.1) and a transverse beam (4.4) is provided at a distance between two longitudinal beams (4.3) ,
Step 1) of transporting the reaction force frame (4) and the accompanying trolley (3) to the position of the vertical shaft (1) to be constructed and adjusting the initial position;
The guide rail (5) at the bottom of the pipe propulsion machine body (6) is removed, the outer side of the shaft (1) is covered with a steel sleeve pipe (16), and the bottom of the steel sleeve pipe (16) is attached to the shaft (1). Step 2) connecting to the tunnel segment (14) around the and preparing for launch;
The tube thruster body (6) is lowered into the steel sleeve tube (16) via a lifting tool (13) and the cutter head (6.3) at the bottom of the tube thruster body (6) is pushed into the shaft (1). step 3) contacting the tunnel segment (14) at the end of the
step 4) of excavating the tunnel segment (14) in which the shaft (1) is located using the cutter head (6.3) of the tube propeller body (6);
a step 5) of lifting the tunnel segment (14) in which the shaft (1) is located to the ancillary truck (3) via a lifting tool (13) to complete preparations for excavation;
A vertical shaft (1) is excavated using a pipe propulsion machine body (6), and muddy water in the vertical shaft (1) is extracted by a muddy water suction device (8), and the extracted muddy water is treated by a muddy water treatment device (9). a processing step 6);
step 7), when excavated to 5m, propelling the side wall segment (15) of the shaft (1) by means of a longitudinal hydraulic cylinder (7);
a step 8) of repeating the process of steps 6) to 7) until construction of the shaft (1) is completed;
The diameter of the tunnel segment (14) excavated by the cutter head (6.3) of the pipe propulsion machine body (6) is less than the diameter of the outer circumference of the cross section of the shaft (1) cut in a plane orthogonal to the vertical direction. at least 20 cm larger ,
The muddy water treatment device (9) processes the muddy water into earth and sand, and then carries it out via the accompanying truck (3),
The second muddy water pipe (11) between the muddy water treatment device (9) and the muddy water suction device (8) extends linearly in the front-rear direction,
The first mud pipe (10) between the mud suction device (8) and the shaft (1) extends from the proximal end of the side connected to the mud suction device (8) toward the shaft (1). sloping downwards to reach the shaft (1)
A construction method for a pipe propulsion construction vertical shaft starting device characterized by:

Images