CN120244531A - Dismantling method of shield machine in tunnel - Google Patents

Abstract

The application provides an in-tunnel dismantling method of a shield machine, which comprises the steps of providing a dismantling chamber, installing a dismantling machine tool capable of sliding along the front-rear direction of the shield machine in the dismantling chamber, forming a dismantling space by the dismantling machine tool, locating a module to be dismantled of the shield machine to a specified position in the dismantling space, translating a front middle shield body to a set position, reserving a cutter disc placing area at the front side of the front middle shield body for placing a cutter disc, reserving a dismantling area at the rear side of the front middle shield body for dismantling the front middle shield body, gradually dismantling the cutter disc and placing the cutter disc in the cutter disc placing area, gradually dismantling and transporting the front middle shield body and a main driving wellhead, and transporting the cutter disc module to an originating wellhead. According to the in-tunnel dismantling method of the shield machine, the shield machine is dismantled one by utilizing the dismantling tool and the lifting hook, and is conveyed to the originating wellhead by utilizing the transport vehicle, so that the process is safe and controllable, and the implementation is convenient.

Description

Method for disassembling shield tunneling machine in tunnel

Technical Field

The application relates to the technical field of tunnel tunneling equipment, in particular to a method for inserting holes in a shield tunneling machine.

Background

The shield machine is the most commonly used engineering machine for the current underground tunnel engineering, and is widely applied to the infrastructure construction of urban water conservancy, hydropower, subways, highways and the like. In some construction projects, a construction party can select a soil pressure balance type shield machine, and the soil pressure balance of an excavation surface can be maintained in the tunneling process, so that the safety and the efficiency of construction can be ensured. The method is limited by the ground condition or municipal construction requirement, a recovery well of the shield machine cannot be excavated, the shield machine can only be disassembled in a hole and then respectively conveyed to the ground, the weight and the size of a single part of a large part of the shield machine are large, the safety and the quality control in the disassembling and hoisting processes are difficult, meanwhile, large mechanical equipment cannot operate due to the restriction of the space of a disassembled grotto, the construction efficiency of constructors by using small equipment is low, and the construction risk is high.

In view of the above, it is necessary to design a method for disassembling the shield tunneling machine in the tunnel to solve one of the above problems.

Disclosure of Invention

The application provides an in-hole disassembly method of a shield machine, which is used for disassembling main components of the shield machine in a disassembly hole, transporting the main components to an originating wellhead, and then adjusting the main components to the ground through a crawler crane.

In order to achieve the above purpose, the technical scheme provided by the application is as follows:

The method for disassembling the shield tunneling machine in the hole is suitable for disassembling the shield tunneling machine in the hole with balanced soil pressure, and comprises the following steps:

Providing a disassembly cavity, and installing a disassembly machine tool capable of sliding along the front-back direction of the shield machine in the disassembly cavity, wherein the disassembly machine tool is formed with a disassembly space;

the method comprises the steps of enabling a shield machine to reach a designated position, wherein a module to be disassembled of the shield machine is located in a disassembling space;

Sequentially disassembling and transporting the screw machine, the assembling machine, the tail shield body and the ring body;

The front middle shield body is translated to a set position, wherein a cutter disc placement area is reserved on the front side of the front middle shield body to place a cutter disc, and a disassembly area is reserved on the rear side of the front middle shield body to disassemble the front middle shield body;

gradually disassembling the cutterhead and placing the cutterhead in a cutterhead placing area;

Gradually disassembling and transporting the front middle shield body and the main drive;

The cutterhead is transported to the originating wellhead.

Further, the cutterhead comprises an A1 module, an A2 module and an A3 module, the cutterhead is gradually disassembled, and a supporting jig frame used for supporting the A1 module, the A2 module and the A3 module is arranged in the cutterhead placing area before the cutterhead is placed in the cutterhead placing area.

Further, the front middle shield body comprises a C1 module, a C2 module, a C3 module and a C4 module, and the step-by-step disassembly and transportation of the front middle shield body and the main drive are specifically that the C1 module, the C2 module and the C3 module are disassembled firstly, then the main drive is disassembled, and finally the C4 module is disassembled.

Further, the main drive is disassembled, a body overturning frame is firstly arranged at the bottom of the disassembling tool, and the disassembling tool horizontally walks to be matched with the lifting of the chain block so as to turn over the main drive to be horizontal.

Further, when the angle of the target module needs to be adjusted in the lifting process, the shoulder pole beam is firstly installed on the dismounting machine tool, and the target module is arranged on the transport vehicle through the angle adjustment of the shoulder pole beam.

Further, in the process of lifting and overturning the target module, the deflection angle of the traction rope is not more than 11 degrees.

Further, before disassembling the mounting and dismounting machine tool in the cavity, treating the foundation in the cavity, wherein the bearing capacity of the treated foundation is not less than,The total weight of the hoisting target module and the equipment contacted with the target module is calculated, n is a safety coefficient, and S is the contact area of the equipment contacted with the target module and the ground.

Further, before the disassembling machine tool is installed in the disassembling chamber, a rail for sliding the disassembling machine tool is installed in the disassembling chamber, and the gradient of the rail is not more than 3 per mill.

Further, before the shield tunneling machine is pushed to a specified position, a pair of inner steel rails for the shield tunneling machine to move and a pair of outer steel rails positioned outside the pair of inner steel rails are pre-buried on the ground of the disassembled cavity, the included angle of the pair of inner steel rails is 25-27 degrees, and the included angle of the pair of outer steel rails is 36-38 degrees.

Further, before transporting each target module, each target module is transported in a simulation mode, and a safe distance is reserved between the target module and the inner wall of the dismantling chamber.

Compared with the related art, the method has the beneficial effects that through the in-hole disassembly method of the shield machine, the shield machine is disassembled one by utilizing the disassembly tool and the lifting hook, and is conveyed to the originating wellhead by utilizing the transport vehicle, so that the process is safe and controllable, and the implementation is convenient.

Drawings

Fig. 1 is a flowchart of a method for in-tunnel disassembly of a shield machine according to an embodiment of the method for in-tunnel disassembly of a shield machine of the present application.

Fig. 2 is a schematic diagram of a front view structure of the shield tunneling machine of fig. 1 in a disassembled tunnel.

Fig. 3 is a schematic side view of the shield machine of fig. 2.

Fig. 4 is a schematic diagram of a front view structure of the dismounting tool in fig. 2.

Fig. 5 is a schematic side view of the dismounting tool in fig. 4.

Fig. 6 is a schematic top view of the dismounting tool in fig. 4.

Fig. 7 is a schematic side view of the disassembled screw machine of fig. 2.

Fig. 8 is a schematic side view of the disassembled splice machine of fig. 2.

Fig. 9 is a schematic diagram of a front view structure of the shield tail body of fig. 2.

Fig. 10 is a schematic front view of the module of fig. 2 with the ring body d1 detached.

FIG. 11 is a schematic front view of the d3 module of FIG. 2 with the ring body removed

Fig. 12 is a schematic side view of the shield body of fig. 2 after translation before disassembly.

Fig. 13 is a schematic front view of the disassembled cutterhead of fig. 2.

Fig. 14 is a schematic front view of the front middle shield body of fig. 2.

Fig. 15 is a schematic side view of the front and rear body of fig. 2 shown disassembled.

1-Disassembling tool, 10-main body frame, 11-supporting column, 111-first supporting column, 112-second supporting column, 12-top frame, 121-spandrel girder, 1211-first spandrel girder, 1212-second spandrel girder, 1213-third spandrel girder, 122-crossbeam, 123-oblique girder, 13-disassembling space, 14-connecting girder, 20-driving mechanism, 21-wheel, 2-lifting hook, 3-shield machine, 31-cutterhead, 32-main driving, 33-shield body, 331-tail shield body, 332-front middle shield body, 34-ring body, 35-assembling machine, 36-screw machine, 4-transport vehicle, 5-supporting jig frame, 6-shoulder pole girder, 100-disassembling chamber, 101-cutterhead placing area and 102-disassembling area.

Detailed Description

In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of simplifying the description of the present application, and are not meant to indicate or imply that the apparatus must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the scope of protection of the present application. Specifically, in the present application, the description of other directions is defined with reference to "up" and "down" with reference to the direction toward the ground, and conversely, the direction away from the ground is the upward direction.

In the various illustrations of the application, some dimensions of structures or portions may be exaggerated relative to other structural portions for convenience of illustration, and thus serve only to illustrate the basic structure of the inventive subject matter.

The application aims at the earth pressure balance type shield machine to disassemble in a tunnel, wherein as shown in fig. 2 to 15, the shield machine 3 mainly comprises a cutter disc 31, a main drive 32, a tail shield body 331, a front middle shield body 332, a ring 34, a splicing machine 35, a screw 36, a connecting bridge (not shown), a rear supporting trolley (not shown) and other main components, the shield machine is disassembled in the tunnel mainly, the main components are disassembled in sequence, the whole volume and the weight of each component are relatively large, some relatively large components are continuously disassembled into target modules, the target modules are disassembled one by one and transported to an originating well through a transport vehicle 4, and then the target modules are hoisted to the ground to complete the disassembling process, and due to the limited space of a disassembling chamber 100, the target modules are hoisted away from the rest part of the shield machine 3 by utilizing a hoisting hook 2 of the disassembling machine 1 in the disassembling process, and the angle or the direction of the target modules are adjusted in the hoisting process, so that the target modules are conveniently placed on the transport vehicle 4 and transported to the originating well.

In the present application, for convenience of description and understanding, the longitudinal direction of the shield machine 3 is defined as front-back, that is, the position of the cutterhead 31 relative to the shield machine 3 is defined as front, and the position of the matching trolley relative to the shield machine 3 is defined as rear, and the width direction of the shield machine 3 is transverse.

The in-tunnel dismantling method of the shield machine 3 is characterized in that a dismantling chamber 100 is provided firstly, a dismantling machine tool 1 capable of sliding along the front-rear direction of the shield machine 3 is installed in the dismantling chamber 100, the shield machine 3 is arranged at a designated position, auxiliary products such as a dismantling machine tool 1, a lifting hook 2 and a steel rope are utilized, as shown in fig. 1, a screw machine 36, an assembling machine 35, a tail shield body 331, a ring 34, a cutter disc 31, a front middle shield body 332 and a main drive 32 are disassembled in sequence, and transported to an originating wellhead, and the whole dismantling process is safe and controllable and convenient to implement.

In order to ensure the safety of the dismantling construction and ensure that the bearing capacity of the foundation in the dismantling chamber 100 meets certain requirements, the foundation in the dismantling chamber 100 is treated before the dismantling tool 1 is installed, and the bearing capacity of the treated foundation is not less than,The total weight of the hoisting weight maximum module and equipment contacted with the module is calculated, n is a safety coefficient, and S is the contact area of the equipment contacted with the target module and the ground.

For example, in the dismantling zone behind the shield machine 3,Is the total weight force of the dismounting machine tool 1 and the weight maximum module, and in the hoisting area of the originating wellhead,Is the total weight of the crawler crane and the maximum weight module, and the safety factor is generally selected to be 1.5 so as to provide a foundation with higher bearing capacity.

Disassembly of the ground in the chamber 100 is required to meet flatness requirements for safety of the construction process. Specifically, the transverse and longitudinal gradients of the foundation in the hoisting area of the originating wellhead are not more than 3%, so that the stability and the safety of the crawler crane in the hoisting process are met.

The track (not shown) for the movement of the disassembling tool is installed on the ground of the disassembly chamber 100, the track extends along the front-back direction, the disassembling tool 1 moves on the track, so that the target module is driven to separate from the rest part of the shield machine 3, the gradient of the track is not more than 3 per mill, the inclination in the process of pulling and hanging the target module is avoided, and the stability and the safety of the disassembling tool 1 in the process of pulling and hanging the target module are further ensured. Depending on the shape of the disassembly tool 1, the rails are mounted near the side walls of the disassembly chamber 100.

Before the shield tunneling machine 3 is pushed to a specified position, a pair of inner steel rails and a pair of outer steel rails are pre-buried on the ground of the disassembled cavern 100 for the shield tunneling machine to move, and the bottom of the shield tunneling machine 1 is arc-shaped, and the inner steel rails and the outer steel rails are transversely distributed in arc shapes, so that the inner steel rails and the outer steel rails are lower than the track. Specifically, the included angle of a pair of inner steel rails is 25-27 degrees, the included angle of a pair of outer steel rails is 36-38 degrees, and the inner steel rails and the outer steel rails are symmetrically designed along the transverse center so as to meet the receiving and translation requirements of the shield machine 3. Preferably, the included angle of the pair of inner rails is 26 ° and the included angle of the pair of outer rails is 37 °.

Because the disassembling tool 1 is relatively large, the disassembling tool is generally assembled in a disassembling chamber 10, fixed hanging points 4 are arranged above the arch top of the disassembling chamber in advance, the left and right spacing is 2000-2400 mm, the front and rear spacing is 2400-2800 mm, the left and right side walls are respectively provided with the fixed hanging points 4, the spacing is 220-260mm, the front and rear spacing is 2400-2800 mm, and the load of each hanging point is not less than 10t so as to meet the requirement of assembling the disassembling tool in the chamber.

Specifically, as shown in fig. 4 to 6, the disassembling tool 1 includes a main body frame 10 for hanging away a target module and a driving mechanism 20 for driving the main body frame 10 to move, where the driving mechanism 20 drives the main body frame 10 to further drive the target module to slowly move, so that the target module can be separated from the rest components of the shield tunneling machine 3.

The main body frame 10 comprises two rows of supporting columns 11 which are transversely arranged, and a top framework 12 which is fixedly connected to the upper ends of the two rows of supporting columns 11, wherein a disassembly space 13 is formed between the two rows of supporting columns 11 and the top framework 12, the top framework 12 comprises a spandrel girder 121 for installing a lifting hook 2, and the lifting hook 2 is connected with the spandrel girder 121 and a target module in cooperation with a lifting rope. The lifting hook 2 in the application is generally selected as a chain block, and the specification and the number of the chain blocks are set according to the weight of a target module.

The distance between the two rows of support columns 11 is 10 meters to 12 meters, preferably, the distance between the two rows of support columns 11 is 11 meters, so that the disassembling space 13 between the two rows of support columns 11 can transversely accommodate the shield machine 3, when the shield machine 3 is empty to be pushed to a preset position, the two rows of support columns 11 are respectively located at two sides of the shield machine 3, and an operable space is reserved between the support columns 11 and the shield machine 3.

Each column of support columns 11 comprises a first support column 111 and a second support column 112 which are arranged along the front-back direction, and the distance between the first support column 111 and the second support column 112 is 2 meters to 4 meters, so that the disassembling tool 1 can cover a larger range along the front-back direction, and a purpose module with a larger volume is convenient to disassemble.

The top frame 12 comprises a pair of transverse beams 122 extending transversely, a pair of oblique beams 123 fixedly connected with the transverse beams 122 and the supporting columns 11, and the oblique beams 123 are arranged to match and disassemble the shapes of the chamber 100 and the shield machine 3 on one hand, and strengthen the structural strength of the machine disassembling tool 1 on the other hand, when the target module is hoisted on the spandrel beams 121, the oblique beams 122 can decompose the stress of the spandrel beams 121 and promote the stability of the whole hoisting process.

The included angle between the oblique beam 122 and the supporting column 11 is 30-60 degrees, preferably, the included angle between the oblique beam 122 and the supporting column 11 is 45 degrees, at this time, the structure of the disassembling tool 1 is the most stable, and the design that the top of the disassembling chamber 100 is arc-shaped is met.

In the present application, the vertical downward projection length of the oblique beam 123 is not greater than half the length of the cross beam 122, the lateral projection height of the oblique beam 123 is not greater than half the total height of the support column 11 and the driving mechanism 20, and the size of the oblique beam 123 can ensure the structural strength and stability of the whole disassembly tool assembly 100 within a certain size.

The spandrel girder 121 includes a first spandrel girder 1211 fixedly connected to the pair of cross girders 122, and a second spandrel girder 1212 fixedly connected to the pair of diagonal girders 122, and the first spandrel girder 1211 and the second spandrel girder 1212 extend in the front-rear direction, so that the hook 2 can be installed on one hand, and the stability of the disassembling machine 1 can be improved on the other hand.

Preferably, two first spandrel girders 1211 are provided and are connected between a pair of the cross girders 122 at a lateral interval, and the hooks 2 may be hung on one or two first spandrel girders 1211 as required.

The ratio of the distance between the two first spandrel girders 1211 to the length of the cross girder 122 is one third to one half, and the balance of the whole disassembling tool 1 is maintained during the hoisting process.

Preferably, the second spandrel girder 1212 is fixed to an intermediate position of the diagonal girder 123 in the length direction thereof.

It will be appreciated that the length of the first and second spandrel girders 1211, 1212, i.e., the distance between the first and second support columns 111, 112.

The spandrel girder 121 further includes a third spandrel girder 1213 fixedly connected to the two first spandrel girders 1211, the third spandrel girder 1213 extends in a transverse direction, and the third spandrel girder 1213 is greater than half of the length of the cross beam 122, so that the structural strength of the disassembling tool 1 can be further improved, the point for setting a lifting hook is increased, and the flexibility of the disassembling process of the shield machine 3 is increased.

The spandrel girder 121 further includes a fourth spandrel girder 1214 fixedly connected with each row of two adjacent support columns 11, and the fourth spandrel girder 1214 may cooperate with other spandrel girders to hang the lifting hook 2 on the one hand, and may further promote the stability of the dismounting tool 1.

The top frame 12 is a cross plate, the cross plate is connected to the upper ends of the two rows of support columns 11, and the spandrel girder 121 is located below the cross plate for hanging a hook, which can also achieve the purpose of hanging away from a target module, and is also within the scope of the present application.

The disassembling space 13 is formed between the support column 11, the cross beam 122 and the oblique beam 123, wherein the height of the disassembling space 13 is 8 meters to 11 meters, that is, the distance between the cross beam 122 and the bottom end of the driving mechanism 20 is 8 meters to 11 meters, so as to meet the height of the shield machine 3. Preferably, the height of the dismantling space 13 is 9.5 meters.

The main body frame 10 further comprises a connecting beam 14 connected to two adjacent support columns 11 in each row, and the connecting beam 14 is located below the fourth spandrel girder 1214, so that the structural strength of the dismounting machine tool 1 can be further increased. In this embodiment, the connecting beam 14 is aligned with the extending direction of the first and second spandrel girders 1211 and 1212.

In this embodiment, the length of the connecting beam 14 is 2 to 4 meters, preferably, the length of the connecting beam 14 is 3 meters, so that the disassembling tool 1 can cover a larger range, and an operator can walk on the connecting beam 14 to facilitate the operator to implement the disassembling process.

In the application, the main body frame 10 is formed by welding H-shaped steel, so that the whole main body frame 10 has larger strength and rigidity and reduces the self weight, specifically, the H-shaped steel comprises a web plate and flange plates connected to two ends of the web plate, and the widths of the web plate and the flange plates are not less than 400mm, so that the disassembling tool 1 has excellent mechanical property and bearing capacity.

Preferably, the main body frame 10 further comprises a sealing plate connected to the end of the flange plate, and the sealing plate is designed to increase the structural stability and bearing capacity of the dismounting tool 1 and prevent the H-shaped steel from being distorted when being stressed. Preferably, the thickness of the sealing plate is 8mm-12mm.

Further, the driving mechanism 20 is fixed to the supporting column 11 to drive the main frame 10 to move in the front-rear direction, in this embodiment, the driving mechanism 20 is fixed to the lower end of the supporting column 11 and moves along the track of the bottom of the dismantling chamber 100 in the front-rear direction.

Specifically, the driving mechanism 20 includes a wheel 21 connected to the lower end of the supporting column 11, and a motor for driving the wheel to move, and the motor is a 6-stage 11kW motor, so that the disassembling tool 1 has enough driving force to be lifted off the target module.

The method comprises the steps of preparing a plurality of shackles, haulage ropes and lifting hooks which are used cooperatively with a disassembling machine tool 1, wherein the shackles are not smaller than 55t in specification, the haulage ropes are steel ropes, different specifications of steel ropes can be prepared according to requirements, the tensile strength of the steel ropes with the maximum specification is not smaller than 177kg/mm < 2 >, the breaking force of the 6X 37 steel ropes with D=80 is not smaller than 374t, the lifting hooks are chain blocks, the chain blocks with different rated lifting weights can be prepared according to requirements, the maximum rated lifting weight of the chain blocks is not smaller than 30t, and the purpose of installation and construction is achieved in the lifting process of a target module with the maximum weight.

After the preparation work of the disassembly chamber 100 is finished, the shield machine 3 is empty pushed into the disassembly chamber 100, then the connecting bridge and the rear matched trolley are disconnected, and the shield machine is sequentially pulled to the starting well and is hoisted out of the well to be disassembled on the ground.

The preparation work before disassembly, for example, checking whether the working condition and the identification of each part of the shield machine 3 are complete, cleaning the shield machine 3 to ensure that the functions of each part can normally operate, the functions of the whole system are complete, and the whole system can normally operate after subsequent assembly.

And (3) pushing the shield machine 3 to a designated position, specifically, after receiving the shield machine 3, adopting a rail clamping device to match with the disassembling tool 1, and pushing the disassembling tool 1 by utilizing a plurality of symmetrical groups of pushing oil cylinders to push counter force so as to push the shield machine 3 to the designated position.

As shown in fig. 7, the screw machine 36 is started to be dismounted, the screw shaft is retracted, the front end gate is closed, relevant matched components are dismounted, the operation platform of the assembly machine 35 is dismounted, the plate part of the transport vehicle 4 is extended below the joist of the assembly machine 35, lifting lugs are welded at the top and the inside of the tail shield body 331, a 30t chain block is hung on a third bearing beam 1213 of the dismounting tool 1 to pull a main lifting point at the rear of the screw machine 36, the angle of the screw machine 36 is regulated by the 20t chain block at the lifting point at the top of the tail shield body 331, the dismounting tool 1 slowly moves backwards, the screw machine 36 is pulled out, the tail shield body 331 is pulled backwards, and the screw machine 36 is slowly pulled outwards by the front-back matching of the 30t chain block at the dismounting tool 1 and the 20t chain block at the tail shield body 331 with the internal 5t chain block.

And a hanging point is arranged at the top of the pipe piece, a20 t chain block is hung on the third spandrel girder 1213, and the screw 36 is placed flat by matching with the 30t chain block at the disassembling tool 1 and the 20t chain block at the tail shield body 331, and is transported to an originating well on a transport vehicle.

During the installation of the steel cord, the steel cord is inclined, i.e. the upper end of the steel cord is inclined backwards, so that the screw 36 has a pulling force on the screw 36 during the slow backward movement of the screw 36, which is beneficial for the removal of the screw 36.

For disassembly of the assembly machine 35, as shown in fig. 8, the suction cups of the assembly machine 35 are temporarily stored in the tail shield body 331 after being disassembled, the front end and the rear end of the joist of the assembly machine 35 are firstly erected by welding four support legs with profile steel, the two side welding supports are fixed with the tail shield body 331 into a whole to strengthen stability, the joist flange bolts are disassembled again to separate the joist from the H beam, 2 groups of 20t chain blocks at the top hanging point of the tail shield body 331 are used for pulling the hanging point in front of the joist, 2 groups of 30t chain blocks are hung on the first spandrel beam 1211 of the assembly machine tool 1 for pulling the hanging point behind the joist of the assembly machine 35, finally, the assembly machine tool 1 is controlled to slowly walk backwards, the rotating ring of the assembly machine 35 is integrally moved out of the joist, the assembly machine 35 is slowly pulled outwards by matching the front and rear chain blocks, and the assembly machine 35 is placed on a transport vehicle to be lifted out of an originating well.

For the disassembly of the tail shield body 331, as shown in fig. 9, the tail shield body 331 is first split into an e1 module, an e2 module and an e3 module, and the tail shield body is disassembled in sequence according to the order of the e1 module, the e3 module and the e2 module.

Specifically, a locating pin, a locating seat and a lifting lug are welded on the e1 module, and the position of the lifting lug is properly adjusted according to the actual working condition. And moving the disassembling tool 1, placing the e1 module on the ground of the disassembling cavity 100 through the chain block, installing the shoulder pole beam, re-lifting the e1 module and adjusting the angle to enable the e1 module to fall on a transport vehicle.

The lifting process of the e3 module is the same as that of the e1 module, and will not be repeated.

Before the e2 module is disassembled, the sucker of the assembling machine 35 is placed on a transport vehicle for transport, a group of chain blocks with 30t are hung on the third spandrel girder 1213, the e2 module is pulled, and then the e2 module is disassembled in a mode of disassembling the e1 module.

The ring 34 includes a d1 module, a d2 module, a d3 module, and an H-beam, and the ring 34 is disassembled, that is, the d1 module, the d2 module, the H-beam, and the d3 module are disassembled in sequence.

As shown in fig. 10 and 11, a locating pin, a locating seat and a lifting lug are welded on a d1 module, the position of the lifting lug is properly adjusted according to actual working conditions, a connecting pin of an articulated oil cylinder is removed, the articulated oil cylinder is removed, 2 rows of chain blocks are hung on a first spandrel girder 1211 and a second spandrel girder 1212 of a disassembling machine tool 1, each row of chain blocks is hung with 30t of chain blocks, the d1 module is pulled, then the d1 module is cut off, the articulated seal is removed, the disassembling machine tool 1 is moved, the d1 module is placed on the ground of a disassembling cavity 100 through the chain blocks, a shoulder pole girder 6 is installed, and the d1 module is lifted again and adjusted in angle so that the d1 module falls on a transport vehicle.

The mode of dismantling the d2 module, the H beam and the d3 module is the same as the mode of dismantling the d1 module, but when the H beam is dismantled, square timber for supporting the H beam is firstly placed on the ground, then the H beam is temporarily placed on the square timber, and then the angle is lifted again and adjusted.

After the modules are removed, as shown in fig. 12, the front middle shield body 332 is translated again, and the front middle shield body 332 carries the cutterhead 31 to move backward so as to reserve a space for disassembling the cutterhead 31 in front, thereby facilitating the disassembly of the cutterhead 31.

The front middle shield 332 body is specifically translated to a set position by adopting a rail clamping device to match with the disassembling tool 1 and pushing the disassembling tool 1 through an external jack, a cutter disc placing area 101 is reserved at the front side of the front middle shield 332 body so as to place the cutter disc 31, a disassembling area 102 is reserved at the rear side of the front middle shield 332 body so as to disassemble the front middle shield 332, preferably, the front-rear distance of the cutter disc placing area 101 is at least 6520mm so as to meet the temporary storage of the cutter disc module, and the front-rear distance of the disassembling area 102 is at least 7880mm so as to meet the loading of the front middle shield 332 module and the rolling and turning of the main drive 32.

The cutter head 31 comprises an upper a1 module, a lower a2 module and a middle a3 module, and the cutter head 31 is disassembled in the sequence of sequentially disassembling the a1 module, the a2 module and the a3 module.

As shown in fig. 13 and 15, the a1 module is disassembled, specifically, lifting lugs, locating pins and locating seats are welded on the a1 module, the disassembling tool 1 moves forwards to a cutter head placing area 101, 2 groups of 30t chain blocks are hung on a first spandrel girder 1211 of the disassembling tool 1, the a1 module is pulled, welding seams between the a1 module and the a3 module are removed, connecting bolts are removed, the a1 module is disassembled, a supporting jig frame 5 is erected in the cutter head placing area 101, and the a1 module is temporarily placed on the supporting jig frame. In the process of disassembling the a2 module, the welding seam between the a2 module and the a3 module needs to be removed, and the a2 module is temporarily placed on the supporting jig frame 5 of the cutter head placing area 101.

Because the a3 module is the heaviest module of the shield machine, when the a3 module is disassembled, 4 groups of 30t chain blocks are hung on the first spandrel girder 1211 and the second spandrel girder 1212 of the disassembling tool 1, and the a3 module is temporarily placed on the supporting jig frame 5 of the cutter head placing area 101.

The front middle shield body 332 is divided into a c1 module located at the upper part of the main drive 32, a c2 module and a c3 module located at two sides of the main drive 32, and a c4 module located at the lower side of the main drive 32, and the front middle shield body 332 and the main drive 32 are disassembled in sequence to disassemble the c1 module, the c2 module, the c3 module, the main drive 32 and the c4 module.

As shown in fig. 14 and 15, before the c1 module is dismantled, the personnel cabin is dismantled first, lifting lugs, locating pins and locating seats are welded on the c1 module, 2 rows of chain blocks of 30t are hung on the first bearing beam 1211 of the dismantling machine tool 1, each row of chain blocks is 2 groups, the c1 module is pulled, connecting bolts are dismantled, the dismantling machine tool 1 is moved, the c1 module is placed on the ground of the dismantling area 101 through the chain blocks, then the c1 module is lifted again through the shoulder pole beam 6, the angle is adjusted, and the c1 module is placed on a transport vehicle and transported to an originating well.

The angle that needs the adjustment when disassembling c2 module and c3 module is great, and chain block sets up on first spandrel girder 1211, second spandrel girder 1212 and fourth spandrel girder 1214 of tearing open quick-witted frock 1, disassembles c2 module and c3 module in proper order according to the mode of disassembling c1 module to transport to the originating well.

The main drive 32 is disassembled, first, a main drive lifting lug is installed, 4 groups of 30t chain blocks are hung on a first spandrel girder 1211, the main drive 32 is lifted through the 4 groups of 30t chain blocks, the disassembling machine tool 1 is moved backwards, a body turning frame is installed at the bottom, the main drive 32 is turned to be horizontal through the horizontal running of the disassembling machine tool 1 and the lifting of the chain blocks, the disassembling center is rotated, the main drive is transported to an originating wellhead for lifting by adopting a transport vehicle, the arrangement form of the 30t chain blocks at the disassembling machine tool 1 is changed, the main drive lifting lug is replaced in 2 rows, and the main drive 32 is horizontally lifted to the transport vehicle through the 4 groups of 30t chain blocks.

In the process of overturning the main drive 32, in order to ensure the stability in the hoisting process, the situation that the main drive is dragged is avoided, and the deflection angle of the traction rope is controlled to be not more than 11 degrees, so that the horizontal force is controlled within a safe range, and the safety in the construction process is ensured.

The c4 module is then disassembled and transported to the originating well in the manner of disassembling the c1 module.

The cutterhead 31 is then transported to the originating well, with the a3 module being transported first, the a2 module being transported last, and the a1 module being transported in order from near to far from the originating well.

Specifically, 4 groups of 30t chain blocks are hung on a first spandrel girder 1211 and a second spandrel girder 1212, a3 module is turned over to be horizontal through the cooperation of horizontal running of a disassembling machine tool 1 and lifting of the chain blocks, the deflection angle of a traction rope is controlled to be not more than 11 degrees in the process of turning over the a3 module, the chain blocks are replaced to the first bearing 1211 girder and are distributed in a 2 x 2 mode, lifting lugs of the a3 module are replaced, a shoulder pole girder 6 is installed, and the a3 module is lifted and adjusted to be in a posture, so that the a3 module falls on a transport vehicle.

And lifting the a2 module and the a1 module in sequence by using the disassembling tool 1, adjusting the angle, horizontally placing the modules on a transport vehicle, and transporting the modules to an originating well.

Before the modules with larger volumes are transported, each target module is firstly transported in a simulation mode, and a safe distance is reserved between the target module and the inner wall of the dismantling chamber 100, wherein the target module with larger volumes comprises a screw machine 36, an assembling machine 35, a main drive 32 and a cutter head a3 module, and when the modules are transported, the distance between the target module and the inner wall of the dismantling chamber 100 is ensured to be not smaller than 1m.

In summary, according to the in-tunnel disassembly method of the shield machine, the shield machine 3 is disassembled one by utilizing the disassembly machine tool 1 and the lifting hook, and is conveyed to the originating wellhead by utilizing the transport vehicle, so that the process is safe and controllable, and the implementation is convenient.

It should be understood that although the present disclosure describes embodiments in terms of examples, not every embodiment is provided with a single embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present application, and is not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the spirit of the present application should be included in the scope of the present application.

Claims (10)

1. The in-hole disassembly method of the shield machine is suitable for in-hole disassembly of the earth pressure balance type shield machine and is characterized by comprising the following steps of:

Providing a disassembly cavity, and installing a disassembly machine tool capable of sliding along the front-back direction of the shield machine in the disassembly cavity, wherein the disassembly machine tool is formed with a disassembly space;

the method comprises the steps of enabling a shield machine to reach a designated position, wherein a module to be disassembled of the shield machine is located in a disassembling space;

Sequentially disassembling and transporting the screw machine, the assembling machine, the tail shield body and the ring body;

shifting the front middle shield body backwards to a set position, wherein a cutterhead placing area is reserved on the front side of the front middle shield body so as to place cutterhead, and a disassembling area is reserved on the rear side of the front middle shield body so as to disassemble the front middle shield body;

gradually disassembling the cutterhead and placing the cutterhead in a cutterhead placing area;

Gradually disassembling and transporting the front middle shield body and the main drive;

The cutterhead is transported to the originating wellhead.

2. The method for disassembling the shield tunneling machine in the tunnel according to claim 1, wherein the cutterhead comprises an A1 module, an A2 module and an A3 module, and the supporting jig frames for supporting the A1 module, the A2 module and the A3 module are arranged in the cutterhead placement area before the cutterhead is gradually disassembled and placed in the cutterhead placement area.

3. The method for disassembling the shield machine in the tunnel according to claim 1, wherein the front middle shield body comprises a C1 module, a C2 module, a C3 module and a C4 module, and the step-by-step disassembling and transporting the front middle shield body and the main drive comprises the steps of disassembling the C1 module, the C2 module and the C3 module, then disassembling the main drive and finally disassembling the C4 module.

4. The method for disassembling the shield tunneling machine in the tunnel according to claim 3, wherein the main drive is disassembled, a body turning frame is installed at the bottom of a disassembling tool, and the disassembling tool is horizontally moved and matched with the lifting of the chain block to turn the main drive to be horizontal.

5. The method for disassembling the tunnel of the shield machine according to claim 1, wherein when the angle adjustment is required in the process of lifting the target module, a shoulder pole beam is firstly installed on the disassembling machine, and the target module is adjusted in angle through the shoulder pole beam and placed on a transport vehicle.

6. The method for disassembling the shield tunneling machine in the tunnel according to claim 1, wherein the deflection angle of the hauling rope is not more than 11 ° in the process of lifting and turning the target module.

7. The method according to any one of claims 1 to 6, wherein the foundation in the dismantling chamber is treated before the dismantling machine is installed in the dismantling chamber, and the treated foundation has a bearing capacity not smaller than that of the foundation,The total weight of the hoisting target module and the equipment contacted with the target module is calculated, n is a safety coefficient, and S is the contact area of the equipment contacted with the target module and the ground.

8. The method for disassembling a shield machine in a tunnel according to claims 1 to 6, wherein a track for sliding the disassembling tool is installed in the disassembling tunnel before the disassembling tool is installed in the disassembling tunnel, and the gradient of the track is not more than 3 per mill.

9. The method for disassembling a shield tunneling machine in a tunnel according to any one of claims 1to 6, wherein a pair of inner rails for moving the shield tunneling machine, a pair of outer rails located outside the pair of inner rails, and an included angle of the pair of inner rails is 25 ° to 27 ° and an included angle of the pair of outer rails is 36 ° to 38 ° are pre-buried on the ground of the disassembly tunnel before the shield tunneling machine is air-pushed to a designated position.

10. The method for disassembling a tunnel in a shield machine according to any one of claims 1 to 6, wherein each target module is transported in a simulated manner prior to transporting each target module, and a safe distance is reserved between the target module and an inner wall of the disassembled tunnel.