CN116281606B

CN116281606B - Shield machine crane assembly method

Info

Publication number: CN116281606B
Application number: CN202310177024.3A
Authority: CN
Inventors: 任朋静; 李政; 徐正陶; 张万曙; 李想; 许斌斌; 杨洋; 高卫君; 肖思宇; 任宗清
Original assignee: China Railway Tunnel Group Co Ltd CRTG; China Railway Tunnel Stock Co Ltd
Current assignee: China Railway Tunnel Group Co Ltd CRTG; China Railway Tunnel Stock Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2025-08-12
Anticipated expiration: 2043-02-28
Also published as: CN116281606A

Abstract

The application discloses a shield machine crane assembly method, and aims to solve the problems that the shield machine crane assembly efficiency is low and the construction period is occupied. The method mainly comprises the following steps of (1) setting up a working well, (2) arranging a winch and a sliding rail, (3) lowering a counter-force frame bottom component and an originating platform, (4) hoisting a temporary guide platform, (5) hoisting a duct piece conveying trolley, (6) - (17) moving a shield body and a rear supporting device forward in a main wellhead and a secondary wellhead corresponding to the lower well (18) shield body, (19) installing a middle box culvert and a side rail, (20) installing a counter-force frame top (21) installing a negative ring duct piece, and debugging the shield machine. The shield machine lifting assembly method has the advantages of high lifting efficiency, short lifting construction period and the like.

Description

Shield tunneling machine hanging assembling method

Technical Field

The application relates to the technical field of shield equipment, in particular to a shield machine hanging assembly method.

Background

The shield machine is large complex tunneling equipment consisting of multiple systems of current collection, gas, hydraulic pressure and the like, and mainly consists of a main structure and rear supporting equipment, wherein the main structure part of the shield machine comprises a cutter head, a shield body, a driving device, a segment erector, a soil discharging mechanism and the like, the rear supporting equipment generally consists of a section of connecting bridge and a plurality of sections of trailers, and the connecting bridge is excessive connecting equipment between the shield body part and the corresponding rear supporting trailer part, and the connecting bridge and the rear supporting trailer are driven by the shield body to advance during tunneling. The rear supporting equipment is provided with an electric control system, a hydraulic system, a grouting system, a bentonite system, a foam system, a compressed air system, a circulating water system, a lubricating system, a muck and duct piece conveying system, a grease seal and the like, so that various supports are provided for tunneling of the main body structure part of the front end of the shield machine.

Because the shield machine comprises a large number of system components, the shield machine is huge in volume and weight and cannot be transported, lifted and lowered in the well integrally. Therefore, the shield machine needs to be disassembled and conveyed to a construction site after production, each component device is sequentially hoisted into a shield starting well through hoisting equipment to be assembled into a complete machine, and tunneling can be started after debugging is finished. In the hoisting process, the problems of low installation efficiency and serious occupation of construction period generally exist due to numerous shield machine components, complex structure and large process overall difficulty.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.

Disclosure of Invention

In view of at least one of the above technical problems, the disclosure provides a shield machine crane assembly method, which aims to solve the problems of low assembly efficiency and occupied construction period of a shield machine crane.

According to one aspect of the present disclosure, there is provided a shield machine crane assembly method comprising the steps of:

(1) The working well is formed, and comprises a main wellhead formed at an originating hole of the shield tunneling machine and used for hoisting a shield host, a secondary wellhead which is parallel to the central axis of a tunnel to be tunneled and used for hoisting a rear matched trailer, and a connecting cavity formed between the two wellhead and used for lifting the secondary wellhead in a two-stage ladder shape from the main wellhead;

(2) Arranging a winch on the surface of a first stage of the two-stage ladder, which is relatively lower in the joint of the two stages of ladder, and arranging a sliding rail on the surface of a second stage of ladder, wherein one end of the sliding rail extends to the lower part of the auxiliary wellhead, and the other end of the sliding rail extends to the upper part of the winch and covers the position of the winch;

(3) A counter-force frame bottom component and an originating platform are placed at the main wellhead, and the arrangement direction of the counter-force frame bottom component and the originating platform is parallel to the central axis of a tunnel to be tunneled;

(4) Hoisting a temporary guide table on the originating table, wherein the temporary guide table comprises a plurality of segment rings, and splicing longitudinal seams of the segment rings on the ground before hoisting the temporary guide table;

(5) Sequentially hoisting segment conveying trolleys to the temporary guide table in a segmented manner from a main wellhead, and translating the segment conveying trolleys to the auxiliary wellhead direction by a certain distance through the winch for segment assembly of the subsequent segment conveying trolleys;

(6) The second half section of the trailer No.1 is hoisted to the temporary guide table through the main wellhead, and is towed and translated to the direction of the auxiliary wellhead through the winch, and the translation distance meets the requirement that two hoisting points at the front end of the trailer No.1 are positioned in the main hoisting range and a hoisting space of the first half section of the trailer No.1 is reserved;

(7) The front half section of the trailer No. 1 is hoisted to the temporary guide table by the main wellhead, is correspondingly connected with the rear half section of the trailer No. 1, and is assembled with corresponding top equipment;

(8) Starting a winch to integrally translate the No.1 trailer to the direction of the auxiliary wellhead until the temporary guide table is completely exposed, and removing the temporary guide table;

(9) The method comprises the steps of lowering a bottom No. 5 shield body at a position corresponding to an originating platform at a main wellhead, reserving a cutter disc and a portal steel ring, sequentially lowering the No. 4 shield body and the No. 6 shield body at the main wellhead, connecting and fixing the shields with the No. 5 shield body, and supporting the shields at the positions corresponding to the No. 4 shield body and the No. 6 shield body;

(10) The well-shaped beam is arranged from the main wellhead and is correspondingly and fixedly connected with the shield bodies 5, 4 and 6; simultaneously, the auxiliary wellhead is lowered into the rear part of the connecting bridge, and the auxiliary wellhead is horizontally moved in the main wellhead direction through the winch and the sliding rail to be correspondingly connected with the front part of the connecting bridge;

(11) The main drive is driven to go into the well from the main wellhead through the main drive body turning frame, and is correspondingly and fixedly connected with the No. 5 shield body, the No.4 shield body and the No. 6 shield body;

(12) Simultaneously, a No. 2 trailer with a sliding block welded at the bottom corresponding to the lower part of the auxiliary wellhead is put down from the auxiliary wellhead, and is translated to be correspondingly connected with the rear part of the connecting bridge in the direction of the main wellhead through the winch and the sliding rail;

(13) Simultaneously, a No. 3 trailer with a sliding block welded at the bottom corresponding to the bottom is lowered from the auxiliary wellhead, and is translated to be correspondingly connected with the No. 2 trailer in the direction of the main wellhead through the winch and the sliding rail;

(14) The tail shield bottom block is placed at the position of the main wellhead and correspondingly connected with the shield body, and a well pipe sheet mounting machine is placed from the main wellhead and correspondingly connected with the Mi-shaped beam;

(15) After the cutter head is assembled and welded on the ground, two crawler cranes are arranged to be respectively used as a main crane and an auxiliary crane to turn over the cutter head, and the lifting lugs at the bottom of the cutter head are disassembled and then assembled and installed in a well;

(16) The remaining three tail shields are sequentially arranged in a well, and meanwhile, a No. 4 trailer with a corresponding sliding block is welded at the bottom of the lower part of the auxiliary wellhead and is translated in the direction of the main wellhead through a winch and a sliding rail to be correspondingly connected with the No. 3 trailer;

(17) A No. 5 trailer with a corresponding sliding block welded at the bottom is placed at the auxiliary wellhead, and is translated in the direction of the main wellhead through a winch and a sliding rail to be correspondingly connected with the No. 4 trailer;

(18) Starting two groups of thrust cylinders at the bottom of the shield machine, and moving the shield body forwards to the cutterhead to be in sealing contact with the tunnel portal;

(19) The trailer No. 1 is correspondingly connected with the shield host, and side rails are arranged at the positions from the intermediate box culvert of the auxiliary wellhead underground well to the connecting bridge area corresponding to the connecting grotto step positions, and after the trailer No.2, 3, 4 and 5 slides to the positions corresponding to the sliding rail ends, trailer wheel pairs corresponding to the side rails are arranged;

(20) The top of the force frame to be installed is hung into a well after being integrally assembled on the ground, and is fixedly connected with the bottom of the reaction frame;

(21) And installing a negative ring segment and debugging the shield machine.

In some embodiments of the disclosure, in the step (1), the bottom of the main wellhead is applied as a concrete bearing platform, and an embedded steel plate for fixing the reaction frame and the starting platform is arranged at a position corresponding to the concrete bearing platform, and the bottom of the embedded steel plate is connected with the steel bar inside the concrete bearing platform through the steel bar.

In some embodiments of the disclosure, in the step (4), before the temporary guide table is lifted, the elevation of the originating table is measured, the height difference between the originating table and the outer surface of the segment ring to be paved of the shield tunneling machine is calculated according to the axis of the tunnel to be tunneled, and accordingly, the working steel with the corresponding height is fed and fixed at the position corresponding to the originating table.

In some embodiments of the disclosure, in the step (4), the temporary guide platform assembled on the ground is formed by four hanging strip pocket lower wells with chain links arranged between the hanging strip pocket lower wells and the main hanging hooks, and the space position of the temporary guide platform is adjusted through the chain links, so that the pre-buried bolt holes of the segment of the temporary guide platform are matched with the corresponding bolts of the originating platform one by one.

In some embodiments of the disclosure, in the step (6), 4 splayed wheels are correspondingly installed before the second half of the trailer # 1 is lowered into the well, and a part of top layer equipment is installed on the top of the trailer # 1 before the trailer # 1 is lifted and transferred into the well.

In some embodiments of the disclosure, in the step (7), 2 splayed oblique wheels are correspondingly installed before the front half section of the No. 1 trailer goes into the well, and a jack is arranged below the splayed oblique wheels after the trailer goes into the well to adjust the spatial position of the splayed oblique wheels, so that the splayed oblique wheels are correspondingly connected with the rear half section of the No. 1 trailer through bolts.

In some embodiments of the disclosure, in the step (7), an auxiliary crane is disposed at the main wellhead, and the space position of the rear half section of the No. 1 trailer is lifted and adjusted by two lifting points disposed at the front end of the rear half section of the No. 1 trailer and located within the range of the main wellhead, so that the rear half section of the No. 1 trailer is correspondingly connected with the front half section of the No. 1 trailer.

In some embodiments of the disclosure, in the step (9), the supports corresponding to the number 4 and number 6 shield bodies are 175 or 200 steel, and the positions corresponding to the bottom of the well are provided with pre-buried steel plates, and the supports are fixedly connected with the pre-buried steel plates.

In some embodiments of the disclosure, in the step (9) or (10), after the supporting wheel pair corresponds to the connecting bridge, a circular pipe pier is placed under the connecting bridge, the supporting wheel pair is welded at the corresponding position, and after the welding is completed, the circular pipe pier is removed.

In some embodiments of the disclosure, in the step (11), the main driving turn-over uses two crawler cranes as the main crane and the auxiliary crane respectively, the two crawler cranes are lifted to a certain height from the ground at the same time, then the main crane is lifted and the auxiliary crane is lowered at the same time, until the auxiliary crane is completely unstressed, and finally the main crane is lowered and the auxiliary crane lifting tool is removed, and then the main crane and the auxiliary crane are correspondingly installed in the well.

One or more technical solutions provided in the embodiments of the present application at least have any one of the following technical effects or advantages:

1. The main wellhead and the auxiliary wellhead are assembled by the aid of the shield main machine and the rear supporting trailer, working faces for shield machine hanging assembly are effectively increased, hanging assembly operation at the two wellhead can be carried out simultaneously, and lifting assembly efficiency is improved.

2. The winch and the corresponding sliding rail are arranged in the ladder-shaped connection chamber, so that the movement of corresponding component equipment of the shield machine at the front and back positions of the winch is greatly facilitated, and the saving of the equipment displacement time is realized.

3. The temporary guide table solves the problems of support of the duct piece trolley and butt joint movement of the No.1 trailer, and the temporary guide table is assembled on the ground in advance, so that the installation efficiency is greatly improved.

4. The front half section of the No.1 trailer is finely adjusted through the jack, the rear half section of the No.1 trailer is lifted and adjusted by the auxiliary crane, the docking time of the trailer can be saved, and the installation and assembly efficiency of the trailer can be improved.

5. The rest components outside the bottom of the reaction frame are lifted and lowered into the well after being assembled on the ground, so that the frequency of high-altitude lifting operation can be reduced, and the construction period can be saved.

6. The overall process is reasonable, the adopted technical measures are safe and appropriate, time and labor are saved, the process is saved, and the installation period of shield equipment is greatly shortened.

Drawings

FIG. 1 is a schematic diagram of a well according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a process of running a reaction frame downhole in an embodiment of the application.

FIG. 3 is a schematic diagram of an originating station in accordance with an embodiment of the present application.

FIG. 4 is a top view of the primary wellhead after the initiation station has been lowered into the well in accordance with one embodiment of the present application.

FIG. 5 is a schematic view of a temporary guide rail work steel support according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a process of descending a pipe conveying trolley according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a process of lifting the second section of trailer number 1 down a well according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a process of lifting the front half of trailer number 1 down a well according to an embodiment of the present application.

FIG. 9 is a block diagram of a shield according to an embodiment of the present application.

FIG. 10 is a schematic diagram illustrating a simultaneous well-down operation of a shield body portion block and a bridge according to an embodiment of the present application.

FIG. 11 is a schematic illustration of a trailer No. 5 downhole process according to an embodiment of the application.

Fig. 12 is a schematic diagram of middle box culvert and side rail installation in an embodiment of the application.

In the above figures, 10 is a tunnel to be tunneled, 11 is a main wellhead, 12 is a secondary wellhead, 13 is a connecting cavity, 14 is a concrete bearing platform, 21 is a winch, 22 is a sliding track, 31 is a counter-force frame bottom, 32 is an initiating platform, 33 is a temporary guide platform, 34 is an industrial steel support, 35 is a duct piece conveying trolley, 36 is a No.1 trailer second half, 37 is a No.1 trailer first half, 38 is a shield body bottom part block, 40 is a Mi-shaped beam, 41 is a connecting bridge first half, 42 is a connecting bridge second half, 43 is a No. 2 trailer, 44 is a No. 3 trailer, 45 is a No. 4 trailer, 46 is a No. 5 trailer, 47 is a cutter disc, 48 is a duct piece erector, 50 is a middle box culvert, 51 is a side rail, and 52 is a trailer wheel pair.

Detailed Description

In the description of the present application, it should be understood that the directions or positional relationships as referred to by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present application. The terms "connected," "coupled," and "connected," as used herein, unless specifically indicated otherwise, are intended to encompass both direct and indirect connections (couplings).

In order to better understand the technical scheme of the present application, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The embodiment discloses a shield machine hanging assembly method, which is used for hanging and assembling a large-diameter shield machine with an excavation diameter of 13.32 m, wherein the total length of a main machine of the shield machine is about 15 m, the total length of the whole machine is 135 m, the weight of the main machine is about 2027T, the weight of a rear matched trailer is about 1119T, the single space is the maximum weight of a cutter head 461T (comprising a cutter), the rear matched trailer consists of No. 1-5 trailers and 2 connecting bridges, and the specific hanging assembly method comprises the following steps:

(1) The working well is arranged and comprises a main wellhead arranged at the starting hole of the shield tunneling machine and used for hoisting a shield host, a subsidiary wellhead which is parallel to the central axis of a tunnel to be tunneled and used for hoisting a rear matched trailer, and a connecting cavity which is arranged between the two wellhead and is lifted in a two-stage ladder shape from the main wellhead to the subsidiary wellhead.

Considering to wait to hoist and mount shield structure machine structure complicacy, it is longer to hoist and mount the cycle, and the security risk is higher, in order to satisfy the whole equipment process of hanging of shield, promotes packaging efficiency, and shield structure machine hangs and assembles main working face and mainly falls into two, is the main wellhead that is used for shield machine host computer hoist and is used for the auxiliary wellhead of back supporting trailer hoist and mount respectively, and it still includes the connection chamber of opening between two wellhead links to be convenient for the connection between each equipment of going into the well is fixed.

After the well descending equipment is in the well of the main wellhead or the auxiliary wellhead, the well descending equipment needs to be moved so as to facilitate the well descending of the follow-up shield tunneling machine components, therefore, driving equipment needs to be arranged to realize the movement of each component in the well, and for this purpose, the underground connecting chamber is designed into a two-stage ladder shape, see fig. 1, and is lifted from the bottom of the main wellhead to the bottom of the auxiliary wellhead, and driving equipment is arranged at the junction position of the two stages of steps so as to realize the dragging of shield tunneling machine component equipment on the front side and the rear side of the equipment.

In addition, considering that the bottom surface of the bottom of the main shaft has a certain height difference with the lowest point of the tunnel to be tunneled, and in order to facilitate the downward and initiation of the shield body, an initiation platform and a counterforce frame are required to be arranged, and because the weight of the shield body is large, the initiation platform and the counterforce frame serving as bearing stress members are required to be firmly arranged at the bottom of the main shaft, for this purpose, in the embodiment, a concrete bearing platform is arranged at the bottom of the main shaft, and an embedded steel plate for fixing the counterforce frame and the initiation platform is arranged at the position of the concrete bearing platform corresponding to the initiation platform and the counterforce frame, and the bottom of the embedded steel plate extends the supporting leg through steel bars and is connected with steel bars inside the concrete bearing platform.

(2) And arranging a sliding rail on the surface of the second step, wherein one end of the sliding rail extends to the lower part of the auxiliary wellhead, and the other end extends to the upper part of the winch and covers the position of the winch.

After the shield corresponding machine component is in the well of the main wellhead or the auxiliary wellhead, the well-descending equipment component is required to be moved so as to leave the well-descending position corresponding to the wellhead for the convenience of the well-descending installation of the subsequent component, wherein the movement of the well-descending equipment component is required to be correspondingly driven by a driving mechanism. In this embodiment, a sliding rail is arranged on the surface of the second step, one end of the sliding rail extends below the auxiliary wellhead so that corresponding equipment is placed on the sliding rail from the auxiliary wellhead, the other end of the sliding rail extends above the winch and covers the position of the winch, equipment components pass through the upper portion of the winch through the sliding rail to avoid interference, and a part of the sliding rail above the first step is provided with a corresponding supporting frame perpendicular to the surface of the first step to firmly support the sliding rail to avoid bending and bending of the rail.

(3) And (3) placing a reaction frame bottom component and an originating platform at the main wellhead, wherein the arrangement direction of the reaction frame bottom component and the originating platform is parallel to the axis of the tunnel to be tunneled.

After the corresponding windlass and sliding rail are arranged in the working well, the hoisting work of the shield tunneling machine can be started. The shield body is started and needs to be supported by force to push in the tunneling direction, so that a reaction frame is arranged at the starting position to serve as the force support, and the arc-shaped surface of the shield body is considered, so that an originating platform with the same radian as the shield body shell is arranged at the top to serve as the shield body support structure.

Because the reaction frame includes a plurality of subassemblies, in order to avoid the corresponding component of reaction frame to produce the interference of shield host computer component down the well, cause the damage, see fig. 2, at first put the reaction frame bottom down in main well head, in order to guarantee that the reaction frame can provide good stable support, need firmly be fixed in main well bottom with this reaction frame bottom, for this reason, the reaction frame is put down after putting in place, with the pre-buried steel sheet of shaft bottom concrete cushion cap between welded fastening, ensure that the atress is stable.

Referring to fig. 3, the bottom of the reaction frame is installed in place, and then the launching platform is installed in a positioning manner in the well, wherein the length of the launching platform is determined according to the length, the central position and the like of the shield host, and in consideration of the fact that the shield cutterhead is partially embedded into the notch ring, meanwhile, curtain rubber plates are correspondingly distributed at the opening, therefore, referring to fig. 4, the distance between the opening and the reaction frame is required to be larger than the length of the launching platform, enough space is reserved for the launching platform to go in the well, interference between the launching platform and the opening structure is avoided, reworking is caused, and construction progress is affected.

(4) And hoisting a temporary guide table on the upper surface of the originating table, wherein the temporary guide table comprises a plurality of segment rings, and splicing the segment rings at the ground longitudinal seams before hoisting the temporary guide table.

In the tunneling process of the shield machine, a tail shield erector is used for splicing the pipe piece in a tunnel after tunneling to support, a rear matched trailer device and the like are operated on the spliced pipe piece, wherein the pipe piece is spliced in the tail shield, and as the shield machine advances, a gap between the tunnel wall and the spliced pipe piece is closely grouting by a corresponding grouting mechanism of the tail shield, so that a certain height difference exists between the shield machine shell and the spliced pipe piece operated by the rear matched trailer, and therefore, in order to facilitate the descending of the rear matched trailer and smooth the translation in the direction of the auxiliary wellhead, a temporary arc guide table is required to be constructed, the pipe piece spliced by the pipe piece erector is simulated, and the height difference between the starting table and the operating position of the rear matched trailer is compensated. Therefore, after the initial stage is installed and fixed, the temporary guide stage is installed in a downward preventing and aligning mode.

The temporary guide table is formed by splicing segment rings, and the size of the temporary guide table is matched with the arc-shaped size of the inclined wheel pair of the No. 1 trailer, so that the No. 1 trailer can move smoothly on the surface of the temporary guide table. In order to improve the construction efficiency and ensure the operation time node, the temporary guide table is assembled in advance of the ground, longitudinal joints among the pipe piece rings are connected, the temporary guide table is vertically arranged on the ground so as to be convenient for splicing, and after the pipe piece rings are correspondingly connected, the temporary guide table turns over again and goes into the well. In this embodiment, in order to ensure the safety of the temporary guide table in the well, the temporary guide table is formed by four hanging belt bags with chain links between the hanging hooks and the main hanging hooks, and the space position of the temporary guide table is adjusted by the same multi-chain links, so that the bolt holes pre-buried in the pipe sheet correspond to the bolts corresponding to the originating table, and the temporary guide table is stably arranged on the originating table. Therefore, the temporary guide table is assembled on the ground in advance and integrally lowered into the well, the temporary guide table single sheet is prevented from being lowered on the originating table in sequence, the interference of the originating table structure on connection among all duct pieces is avoided, the installation and lifting efficiency of the temporary guide table is greatly improved, and the construction period is saved.

The temporary guide table is directly arranged on the starting table because a grouting gap exists between the tail shield shell and the spliced duct piece, and the height of the intrados of the duct piece cannot meet the running height requirement of the No.1 trailer. In the embodiment, referring to fig. 5, a work steel support with a certain height is fixed on an originating platform, the height of a temporary guide platform is increased, before the temporary guide platform is hoisted, the elevation of the originating platform is measured, the height difference between the originating platform and the outer surface of a segment ring to be paved of a shield tunneling machine is calculated according to the axis of the tunnel to be tunneled, and accordingly, work steel with a corresponding height is discharged and welded and fixed at the originating platform. The method comprises the steps of manually blanking a work steel support, measuring to control the height, unifying the height difference, cutting off the high place and taking support pad measures in the low place, and after the temporary guide table is installed, enabling the intrados of the temporary guide table to be tightly attached to the trailer wheel set, so that the trailer can be smoothly subjected to translational operation from the temporary guide table by a winch.

(5) And sequentially hoisting the segment conveying trolley to the surface of the temporary guide table in a segmented manner from the main wellhead, and translating the segment conveying trolley corresponding to the segment conveying trolley to a certain distance in the direction of the auxiliary wellhead through a winch for segment assembly of the follow-up segment conveying trolley.

After the temporary guide table is fixedly installed, referring to fig. 6, the pipe piece conveying trolley is sequentially and sectionally lifted and lowered from the main wellhead, and the pipe piece conveying trolley needs to translate in the direction of the auxiliary wellhead after being lowered into the well so as to leave a main wellhead lifting space for facilitating the underground installation of subsequent equipment components. Simultaneously, the pipe piece conveying trolley and the winch are connected by adopting a steel wire rope, the winch is used as a driving mechanism, the pipe piece conveying trolley is pulled to translate towards the direction of the auxiliary wellhead by the steel wire rope, and the translation distance is so as to be convenient for completing the connection and assembly of the rest pipe piece conveying trolley in the connection cavity.

(6) And hoisting the rear half section of the No. 1 trailer from the main wellhead, hoisting the rear half section of the No. 1 trailer to the surface of the temporary guide table, and translating the rear half section to the direction of the auxiliary wellhead through a winch, wherein the translation distance meets the condition that two hoisting points at the front end of the No. 1 trailer are positioned in the main hoisting range and a hoisting space of the front half section of the No. 1 trailer is reserved.

The trailer No.1 is lowered from the main wellhead, and because the trailer No.1 is longer in overall structure and larger in weight, the trailer No.1 is hoisted in a segmented mode, and the lower hoisting operation of the rear half section of the trailer No.1 is firstly carried out. The front half section of the No.1 trailer is hung on the ground correspondingly and is provided with 4 splayed oblique wheels at the bottom before being hung on the well, top layer equipment such as a transformer, an air duct, a cable bracket and the like at the top of the front half section of the No.1 trailer is temporarily unassembled, so that the stress angle of a hanging steel wire rope is not interfered when the front half section of the No.1 trailer is hung on the well, the hanging is avoided, the top layer equipment is prevented from being influenced, the front half section of the No.1 trailer is well in place after the rear half section of the No.1 trailer is hung on the well, the front half section of the No.1 trailer can be accommodated by ensuring good contact between the splayed oblique wheels at the bottom of the front half section of the No.1 trailer and a temporary guide platform, and the installation of large pieces of equipment such as the transformer, the air duct and the like at the top of the front half section of the No.1 trailer is carried out after the stress is uniform, and equipment members such as the front half section of the No.1 trailer are required to be well driven by a winch to translate in the direction of the front half section of the No.1 trailer to the auxiliary wellhead. In addition, in this embodiment, when considering that the front and rear parts of the No.1 trailer are in butt joint, the two sections of the trailer need to be adjusted in space position respectively, so as to improve the butt joint efficiency and speed up the construction progress, in this embodiment, after the rear half of the No.1 trailer is translated, the rear half of the No.1 trailer is close to the end of the main wellhead, and 2 lifting points at the front end are exposed in the lifting range of the crane at the main wellhead, so that the rear half of the No.1 trailer is lifted near the end side of the main wellhead through the two lifting points at the front end of the rear half of the No.1 trailer by the crane at the main wellhead, and the space position adjustment is performed rapidly.

(7) Hoisting the front half section of the No. 1 trailer from a main wellhead, hoisting the front half section of the No. 1 trailer to the surface of the temporary guide table, correspondingly connecting with the rear half section of the No. 1 trailer, and assembling corresponding top equipment;

And (3) after the rear half section of the No. 1 trailer is lowered into the well and translated into place, the front half section of the No. 1 trailer is lowered into the well. Similarly, the main wellhead is lifted by the crane and lowered onto the temporary guide table in the main wellhead, and the front half section of the No. 1 trailer is lifted and lowered before the well, and two splayed oblique wheel pairs are arranged at the front end of the bottom of the front half section of the No. 1 trailer, namely at one side close to the hole, as shown in fig. 8, after the installation, the load is lowered from the main wellhead, so that the installation of the down-hole lifting rigging is not influenced and the stress of the rigging is not influenced, the top layer equipment is not arranged before the front half section of the No. 1 trailer, and the installation is performed after the down-hole is completed.

The front section of the No. 1 trailer is provided with 2 splayed oblique wheels only at the end, so that the lifting appliance is not dismounted after the front section is lowered in place, and the space position of the front section is adjusted through the lifting appliance so as to be in butt joint with the rear section of the trailer. In this embodiment, the hoist adopts the chain block and the wire rope who is connected with it, and the chain block passes through wire rope and hoist main hook between relatively fixed, and the chain block lifting hook is fixed with the trailer is worn the hoisting point and is corresponding, from this through the space position of chain block adjustment trailer to the counterpoint operation of being convenient for. Considering that the adjustment error through the chain is great, it is difficult to make the bolt connection portion between two internodes around the trailer of No. 1 accurately to put, consequently, lay the jack in the rear end of the front half section of trailer of No. 1, be close to the end side bottom of the rear half section of trailer of No. 1 to realize its fine setting of spatial position.

In addition, in order to accelerate the efficiency of the connection operation between the front section and the rear section of the No. 1 trailer, the construction period is shortened, and when the space position of the front half section of the No. 1 trailer is adjusted through the lifting rigging and the jack, the space position of the rear half section of the No. 1 trailer can be adjusted at the same time, so that the connection operation progress is accelerated. In this embodiment, considering that the total weight of the rear half section of the No. 1 trailer is close to 200T, the adjustment by adopting the jack is time-consuming and labor-consuming, and the docking efficiency is difficult to effectively improve, therefore, in this example, the front end of the rear half section of the No. 1 trailer is exposed at two hanging points in the range of the main wellhead, an auxiliary crane is arranged at the main wellhead to lift the rear half section of the No. 1 trailer, and the front half section of the No. 1 trailer is matched for adjustment, so that the quick alignment of bolts between the two sections is ensured, the docking operation efficiency is improved, and the construction period is saved.

After the front and back connection of the No. 1 trailer is correspondingly and fixedly connected, the installation of the connection position area and the top equipment part of the front half section such as an ABB cabinet, a transformer, a control cabinet, an air duct, a pipeline, a cable and the like can be carried out.

(8) And starting a winch to translate the whole trailer No. 1 to the direction of the auxiliary wellhead until the temporary guide table is completely exposed, and removing the temporary guide table.

After the whole installation of the No. 1 trailer is finished, starting a winch to translate the whole trailer No. 1 to the direction of the auxiliary wellhead, leaving a hoisting space of the main wellhead, at the moment, the temporary guide table arranged on the starting platform loses the effect, the effect of supporting the pipe piece transportation trolley and the downward translation of the No. 1 trailer is completed, and because the installation position of the shield body is attached to the surface guide rail of the starting platform, the temporary guide table can interfere the lower part of the shield body in place, so that the whole trailer No. 1 is translated towards the direction of the auxiliary wellhead under the dragging of the winch until the front half section of the trailer No. 1 is separated from the temporary guide table, and when the temporary guide table is completely exposed, the temporary guide table and the corresponding work steel support are removed, so that the temporary guide table is prevented from interfering the downward installation of the shield body.

(9) Sequentially hoisting the bottom No. 5 shield body and the No. 4 and No. 6 shield bodies corresponding to the left side and the right side of the bottom No. 5 shield body, lowering the bottom No. 5 shield body at the position corresponding to the starting platform at the main wellhead, reserving the installation distance of the cutter disc and the portal steel ring, sequentially lowering the bottom No. 4 and No. 6 shield bodies at the main wellhead and connecting and fixing the bottom No. 5 shield body with the No. 5 shield body, supporting the positions corresponding to the No. 4 and No. 6 shield bodies, simultaneously lowering the front part of the well connecting bridge at the auxiliary wellhead, translating the front part of the connecting bridge in the direction of the main wellhead through the winch and the sliding rail, and arranging a supporting wheel pair at the front part of the connecting bridge.

And after the trailer No. 1 is installed in the well, lifting the front middle shield body. Referring to fig. 9, the shield body is mainly divided into 8 blocks, and is respectively identified by numerals 1-8. Because the well is installed from the well head, the bottom No. 5 shield body is firstly lifted under the well, the bottom No. 5 shield body is lowered onto the starting platform through the crane at the main well head, the installation position of the follow-up cutterhead and the existence of the portal steel ring are considered, meanwhile, the length between the shield body and the counter-force frame is considered to meet the length of the tail shield, and the enough space position is reserved in front of and behind the No. 5 shield body. After the number 5 shield bodies are positioned and installed, the number 4 shield bodies and the number 6 shield bodies are installed on the two sides of the number 5 shield bodies in sequence, the number 4 shield bodies and the number 6 shield bodies are installed in different sequences, the connecting surfaces are cleaned up before the number 5 shield bodies are respectively connected with the bottom, round sealing strips are installed in sealing grooves and butter is smeared, plane sealing glue is smeared on the connecting surfaces, and after the number 4 shield bodies and the number 6 shield bodies correspondingly fall in place, connecting bolts between the number 4 shield bodies and the number 5 shield bodies are pre-tightened, so that preliminary connection is completed.

Considering that the number 4 shield body and the number 6 shield body are heavy in weight, the reliability and the stability of connection are difficult to ensure only by virtue of the bolt connection between the number 4 shield body and the number 5 shield body. Therefore, the steel plates are supported under the shield bodies Fang Shizuo and Fang Shizuo to play a role in stabilizing, in the embodiment, 175 section steel is used as a supporting piece, steel plates are embedded in the bottom hole during concrete pouring, two ends of the supporting piece are welded and fixed with the shield bodies correspondingly supported and the steel plates embedded in the bottom hole respectively, and in other embodiments, 200 section steel, supporting pieces and embedded steel plates are used for connecting by planting ribs or expanding bolts.

For improving the assembly efficiency of the shield tunneling machine, when the 5, 4 and 6 shield bodies are sequentially hoisted at the main wellhead, the front part of the connecting bridge is lowered at the auxiliary wellhead, as shown in fig. 10, the connecting bridge is arranged between the front and rear matched trailers or the main machine and the trailer in advance and behind the tunneling of the actual shield tunneling machine, the bottom of the connecting bridge is unsupported, after the connecting bridge is lowered through the auxiliary shaft, the connecting bridge needs to be translated towards the main wellhead direction in order to realize the connection with the 1 trailer and avoid affecting the descending of the follow-up equipment components of the auxiliary wellhead, and 4 supporting wheel pairs matched with the sliding track are arranged at the bottom of the connecting bridge for conveniently moving the connecting bridge on the sliding track. In other embodiments, the support wheel pair is welded and arranged at the back of the connecting bridge under the well, a circular pipe pier is arranged at the bottom of the auxiliary wellhead in a cushioning manner, the front part of the connecting bridge is correspondingly arranged on the circular pipe pier, then the welding operation of the support wheel pair is carried out, and after the support wheel pair is welded completely, the circular pipe pier is taken out. And then the winch drags the front part of the connecting bridge to translate along the sliding track towards the main wellhead, and the tail part of the connecting bridge is close to the auxiliary wellhead as much as possible and does not interfere with the subsequent hoisting operation of the auxiliary wellhead.

(10) The well-down cross beam and the rear part of the connecting bridge are fixedly connected correspondingly with the shield bodies No. 5, no. 4 and No. 6 from the main wellhead, the rear part of the connecting bridge is simultaneously lowered at the auxiliary wellhead, and the connecting bridge is horizontally moved in the main wellhead direction through a winch and a sliding rail to be correspondingly connected with the front part of the connecting bridge, and the rear part of the connecting bridge is provided with a supporting wheel pair.

Referring to fig. 9, the cross beam is located at the center of the shield body and connected with each shield body block, so that after the 5, 4 and 6 shield bodies are positioned in the well, the well operation of the cross beam is performed, and the interference to the descending of the cross beam caused by the preceding well descending of the following shield body blocks is avoided. And (3) positioning and installing the rice-shaped beam at the positions of the inner cambered surfaces of the 4,5 and 6 shields corresponding to the connecting positions after the rice-shaped beam is lowered from the main wellhead. Meanwhile, in order to improve hoisting efficiency, the rear part of the connecting bridge is lowered from the auxiliary wellhead, the rear end of the bottom of the rear part of the connecting bridge is far away from the end side bottom of the main wellhead, and two supporting wheel pairs are arranged in the same method as the front part of the connecting bridge, wherein in order to improve efficiency, too many supporting wheel pairs are prevented from being welded, and the construction period is occupied by subsequent dismantling operation, the tail part of the front part of the connecting bridge is moved forward to the corresponding position close to the auxiliary wellhead without influencing the operation of the auxiliary wellhead, therefore, only the rear end of the rear part of the connecting bridge is provided with the two supporting wheel pairs, and the front end of the two supporting wheel pairs are correspondingly connected with the front end of the connecting bridge through the driving of a winch, so that the dismantling time of the two wheel pairs is saved, and the efficiency can be further improved. In addition, after the whole connection of the connecting bridge, the winch is continuously operated to continuously move forward until the connecting bridge is correspondingly connected with the No. 1 trailer.

(11) The main drive is driven to descend into the well from the main wellhead through a main drive body overturning frame, and is correspondingly and fixedly connected with the No. 5 shield body, the No. 4 shield body and the No. 6 shield body;

Because the main drive is also positioned in the shield body, the main drive is lifted and lowered at the main wellhead before the shield body at the top is lowered into the well. Because the main drive has a large weight, and is horizontally transported in the transportation process, and vertical installation is required after the main drive is in the pit, the main drive needs to turn over. In the example, the main drive turns over and adopts two crawler cranes as main crane and auxiliary crane respectively, at first, the two crawler cranes are lifted to a certain height from the ground of the main drive at the same time, then the main crane is lifted and the auxiliary crane falls down at the same time until the auxiliary crane is completely unstressed, and finally the main crane is lowered and the auxiliary crane lifting tool is removed, and then the main crane and the auxiliary crane are correspondingly installed in the well. Before the main drive goes into the well, the connecting surface and the sealing groove are cleaned, clean and clean are ensured, after the main drive goes into the well and is positioned, the main drive is connected with the shield bodies 5, 4 and 6 at the bottom, and the connecting bolts are pre-tightened.

(12) And simultaneously, a No. 2 trailer with a sliding block welded at the bottom corresponding to the lower part of the auxiliary wellhead is put down, and is translated in the direction of the main wellhead through a winch and a sliding rail to be correspondingly connected with the rear part of the connecting bridge.

After the installation of the rice-shaped beam and the main drive in the shield body is completed, the installation of each block at the top of the shield body is carried out. And lifting the shield bodies 3 and 7 of the lower well from the main wellhead in sequence, and respectively connecting the shield bodies 4 and 6 in a counterpoint manner, and pre-tightening the connecting bolts.

When the 3 # shield body and the 7 # shield body are used for descending the well, the descending operation of the 2 # trailer is performed at the auxiliary wellhead in order to improve the hoisting efficiency. The connecting cavity is designed into a step shape for reducing the excavation amount and the layout requirements of equipment such as a winch and the like when the connecting cavity is designed, so that the space height in the connecting cavity cannot meet the wheel set installation requirements of the rear supporting trailer after the auxiliary wellhead is in the well, the rear supporting trailers 2, 3, 4 and 5 are not provided with wheel sets before the well is in the well, the wellhead operation space is not occupied after the rear supporting trailers are in the well, and the translation requirement is further met, and therefore sliding blocks matched with sliding rails are welded at the bottoms of the supporting trailers, so that the smooth translation of the rear supporting trailers is ensured. After the No.2 trailer goes down the well, and the sliding block at the bottom of the No.2 trailer is correspondingly arranged on the sliding rail, the No.2 trailer is slid on the sliding rail through the winch to be connected with the tail part of the connecting bridge.

(13) And simultaneously, a No. 3 trailer with a sliding block welded at the bottom corresponding to the auxiliary wellhead is lowered from the auxiliary wellhead and is translated to be correspondingly connected with the No. 2 trailer in the direction of the main wellhead through a winch and a sliding rail.

And finally, carrying out installation operation of the top shield body, sequentially descending the No. 2 shield body and the No. 8 shield body from the main wellhead, correspondingly pre-tightening connecting bolts between the No. 3 shield body and the No. 7 shield body, and carrying out primary fixed connection. Similarly, for the efficiency of assembly, carry out 3 trailer's translation of going into the well from the auxiliary wellhead, the welding 4 and the track assorted slider that slides of the bottom correspondence of 3 trailer steel construction, make the slider place in on the track that slides after 3 trailer goes into the well to this trailer can translate along this track that slides under the dragging of hoist, is connected with 2 trailer afterbody, leaves well head position simultaneously.

(14) And a tail shield bottom block is placed at the position of the main wellhead and correspondingly connected with the shield body, and a well pipe sheet mounting machine is placed from the main wellhead and correspondingly connected with the Mi-shaped beam.

After each top block of the shield body is in the well from the main wellhead and fixedly arranged, the shield body is arranged completely, and then the tail shield is assembled in the well. The tail shield is mainly divided into four blocks, and comprises a bottom block at the bottom, left and right blocks at the left and right sides and a top block at the top, the tail shield bottom block is firstly subjected to well descending operation, after the tail shield bottom block is well descending and accurate in positioning by adopting an instrument, the tail shield is fixed with a shield body through spot welding, then hoisting and well descending of mechanical equipment in the tail shield are performed, and a pipe piece installing machine is well descending from a main wellhead and is correspondingly and fixedly connected with a Chinese character 'mi' shaped beam of the shield body.

(15) And after the cutter head is welded on the ground, two crawler cranes are arranged to be respectively used as a main crane and an auxiliary crane to turn over the cutter head, and the lifting lugs at the bottom of the cutter head are disassembled and then assembled and installed.

The cutter head is assembled on the ground in advance and subjected to corresponding welding operation, and after the assembly and welding are completed, the cutter head is installed in a well from a main wellhead, wherein the cutter head lies on the ground and is parallel to the ground for the convenience of welding operation, and the cutter head is in a vertical state in a shield machine, so that the cutter head needs to be turned over and then is put into the well. In this embodiment, two cranes are adopted, and are respectively used as a main crane and an auxiliary crane to turn over the cutterhead, firstly, the two crawler cranes slowly hoist the cutterhead parallel to the ground through sling tools penetrating through lifting lugs on two sides of the cutterhead, after the height exceeding the diameter of the cutterhead is reached, the auxiliary crane gradually falls down, the main crane continues to lift, after the auxiliary crane lifting rope is not stressed, the auxiliary crane lifting rope is disconnected from the cutterhead, the lifting lugs on the bottom of the cutterhead are detached, and the cutterhead is arranged in a position aligned by the main wellhead.

(16) The remaining three tail shields are sequentially arranged in the well, and meanwhile, a No. 4 trailer with a corresponding sliding block is welded at the bottom of the auxiliary wellhead downward, and is translated to be correspondingly connected with the No. 3 trailer in the main wellhead direction through a winch and a sliding rail.

The remaining three tail shields are installed after being installed and fixed in the segment erector, the tail shields are sequentially arranged from the main wellhead to the well, are connected with the tail shield bottom blocks in an aligned mode, meanwhile, the roundness of the tail shields is measured through the breaking planes, if the roundness is out of the allowable error, correction is needed, the error is ensured to be in the allowable range, and then tail shield girth welding and longitudinal seam welding with the shield body are carried out according to the tail shield welding scheme. Simultaneously carry out the operation of going into the well of No. 4 trailer from the auxiliary wellhead, likewise, the welding has corresponding slider in the steel construction bottom of No. 4 trailer, and after going into the well, place the slider on the track of sliding, make it slide along the track of sliding, realize the translation of No. 4 trailer under the pulling of hoist engine, and then correspond with No. 3 trailer afterbody and be connected to leave auxiliary wellhead position.

(17) And a No.5 trailer with a corresponding sliding block is welded at the bottom of the auxiliary wellhead and is horizontally moved to be correspondingly connected with the No.4 trailer in the direction of the main wellhead through a winch and a sliding rail.

Referring to fig. 11, the last trailer No. 5 is installed from the auxiliary wellhead down-hole, and similarly, corresponding sliding blocks are welded on the steel structure at the bottom of the last trailer, and the last trailer is translated along the sliding rail to be correspondingly connected with the tail of the trailer No. 4 through a winch and the sliding rail.

(18) And starting two groups of thrust cylinders at the bottom of the shield tunneling machine, and moving the shield body forward to the cutterhead to be in sealing contact with the tunnel portal.

Because the shield body considers the thickness of the cutterhead and the width of the steel ring of the tunnel portal when being installed, a certain distance is reserved between the shield body and the tunnel portal so as to facilitate the installation of the cutterhead in the pit, and further a gap exists between the cutterhead and the tunnel portal, for this reason, two groups of pushing cylinders at the bottom of the shield machine are started, and the shield body moves forwards along the starting platform for a certain distance to seal and prop against the cutterhead and the tunnel portal.

(19) The trailer No. 1 is correspondingly connected with the shield host, the intermediate box culvert of the auxiliary wellhead underground well is correspondingly connected with the step position of the grotto in the connecting bridge area, side rails are arranged on two sides of the intermediate box culvert, and the trailer pairs corresponding to the side rails are arranged after the trailers No. 2,3,4 and 5 slide to the positions corresponding to the end heads of the sliding rails.

After the tail shield and the segment splicing machine inside the tail shield are installed, the rear supporting equipment is connected with the tail shield. In this embodiment, referring to fig. 12, when the rear matched trailer moves forward in the main wellhead direction, the intermediate box culvert is lowered from the auxiliary wellhead, the crane beams on the connecting bridge, the No. 2 trailer and the No. 3 trailer are conveyed to the stepped positions of the connecting bridge areas corresponding to the connecting grottoes for assembly, side rails are arranged on two sides of the intermediate box culvert, after the connecting bridge moves to the box culvert positions and breaks away from the sliding rails, the supporting wheel pairs at the bottoms of the rear matched trailers cannot be removed, and after the rear matched trailers 2,3,4 and 5 move to the sliding rail ends and break away from the sliding rails, the trailer wheel pairs at the bottoms of the respective trailers are correspondingly installed, so that the problem of the continuous moving of the connecting grottoes along the side rails is solved.

(20) And the top of the force frame to be installed is hung into the well after being integrally assembled on the ground, and is fixedly connected with the bottom of the reaction frame.

And connecting pipelines of all the component devices of the shield machine, and installing the top of the reaction frame. The reaction frame is not only the bottom of the well, but also a plurality of components are left, the components are installed on the ground, and the well is correspondingly installed with the bottom of the reaction frame after the ground is assembled, so that the high-altitude operation frequency is reduced, the lifting operation time is shortened, the safety is improved, and the construction period is effectively saved.

(21) And installing a negative ring segment and debugging the shield machine.

And finally, installing the negative ring segment, and pushing the segment to lean against the reaction frame when the whole ring is installed.

While certain preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A shield machine crane assembly method, characterized by comprising the following steps:

(1) Opening a working well, including a main well opening at the starting tunnel of the shield machine for hoisting the shield machine, an auxiliary well opening with a corresponding connection line parallel to the central axis of the tunnel to be excavated and for hoisting the subsequent supporting trailer, and a connecting cavern opened between the two well openings, with a two-step elevation from the main well opening to the auxiliary well opening;

(2) A winch is arranged on the surface of the first step which is relatively low and is located at the junction of the two steps; a sliding track is arranged on the surface of the second step, with one end of the sliding track extending below the auxiliary wellhead and the other end extending above the winch and covering the position of the winch;

(3) Lowering the bottom component of the reaction frame and the starting platform at the main wellhead, wherein the bottom component of the reaction frame and the starting platform are arranged in a direction parallel to the central axis of the tunnel to be excavated;

(4) hoisting a temporary guide platform on the starting platform; the temporary guide platform includes a plurality of segment rings, and the longitudinal seams of the plurality of segment rings are spliced on the ground before the temporary guide platform is hoisted;

(5) The segment transport trolleys are hoisted in sections from the main wellhead to the temporary guide platform, and the segment transport trolleys of the corresponding sections are moved horizontally by the winch to a certain distance in the direction of the auxiliary wellhead for subsequent segment transport trolley segment assembly;

(6) The rear half of trailer No. 1 is hoisted from the main wellhead to the temporary guide platform, and is pulled and moved to the auxiliary wellhead direction by the winch, and the translation distance is such that the two lifting points at the front end of trailer No. 1 are within the lifting range of the main hoist and there is space reserved for the hoisting of the front half of trailer No. 1;

(7) Hoist the front half of trailer No. 1 downhole from the main wellhead to the temporary guide platform, connect it to the rear half of trailer No. 1, and assemble the corresponding top-level equipment;

(8) Start the winch to move the No. 1 trailer as a whole to the direction of the auxiliary wellhead until the temporary guide platform is fully exposed, and then remove the temporary guide platform;

(9) Lower the bottom No. 5 shield at the main wellhead to the corresponding position of the starting platform, and reserve the distance for the cutter head and the tunnel gate steel ring. Then, lower the No. 4 and No. 6 shields in sequence at the main wellhead and connect and fix them between the No. 5 shields. Then, support the No. 4 and No. 6 shields at the corresponding positions. At the same time, lower the front part of the connecting bridge at the auxiliary wellhead and move it horizontally in the direction of the main wellhead through the winch and the sliding track. The front part of the connecting bridge is provided with a supporting wheel pair.

(10) Lower the M-shaped beam from the main wellhead and fix it to the No. 5, 4, and 6 shields; at the same time, lower the rear part of the connecting bridge at the auxiliary wellhead and move it horizontally in the direction of the main wellhead through the winch and the sliding track to connect it to the front part of the connecting bridge; the rear part of the connecting bridge is provided with a supporting wheel pair;

(11) The main drive is lowered from the main wellhead through the main drive turning frame and fixedly connected to the shields No. 5, 4, and 6;

(12) Shields No. 3 and No. 7 are lowered into the main well mouth in sequence and fixed accordingly; at the same time, trailer No. 2 with a corresponding slider welded on the bottom is lowered from the auxiliary well mouth, and is moved horizontally in the direction of the main well mouth through the winch and the sliding track to connect with the rear part of the connecting bridge;

(13) Lower the side blocks 2 and 8 shields and the top block 1 shield in sequence from the main wellhead and fix them accordingly; at the same time, lower the trailer 3 with a corresponding slider welded on the bottom from the auxiliary wellhead and move it horizontally in the direction of the main wellhead through the winch and the sliding track until it is connected to the trailer 2;

(14) Lower the tail shield bottom block at the main wellhead and connect it to the shield body, and lower the well segment installation machine from the main wellhead and connect it to the M-beam;

(15) After the cutterhead is assembled and welded on the ground, two crawler cranes are set up as the main crane and auxiliary crane to help turn the cutterhead over, and the bottom lifting lugs of the cutterhead are removed before assembly and installation in the well.

(16) The remaining three tail shields are lowered into the well in sequence and installed. At the same time, trailer No. 4 with a corresponding slider welded to the bottom is lowered from the auxiliary wellhead and moved horizontally in the direction of the main wellhead through a winch and a sliding track until it is connected to the corresponding trailer No. 3.

(17) Lower trailer No. 5 with a corresponding slider welded on the bottom at the auxiliary wellhead, and move it horizontally in the direction of the main wellhead through the winch and sliding track until it is connected to the corresponding trailer No. 4;

(18) Start the two thrust cylinders at the bottom of the shield machine and move the shield forward until the cutterhead and the tunnel door seal are in contact;

(19) Move trailer No. 1 forward to connect it to the shield machine, and install side rails on both sides of the middle box culvert from the auxiliary shaft mouth to the connecting bridge area corresponding to the connecting cavern step position; and after trailers No. 2, 3, 4, and 5 slide to the corresponding position of the end of the sliding track, install the trailer wheel pair corresponding to the side rails;

(20) Connect the pipeline and install the top of the reaction frame; after the top of the reaction frame is assembled on the ground, it is lowered into the well and fixedly connected to the bottom of the reaction frame;

(21) Install negative ring segments and debug the shield machine.

2. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (1), a concrete pedestal is constructed at the bottom of the main shaft opening, and embedded steel plates for fixing the reaction frame and the starting platform are arranged at corresponding positions of the concrete pedestal, and the bottom of the embedded steel plate is connected to the internal steel bars of the concrete pedestal through steel bars.

3. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (4), before the temporary guide platform is hoisted, the elevation of the starting platform is measured, and the height difference between the starting platform and the outer surface of the shield machine segment ring to be laid is calculated according to the axis of the tunnel to be excavated, and the work steel of the corresponding height is cut and fixed at the corresponding position of the starting platform.

4. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (4), the temporary guide platform assembled on the ground is lowered into the well by four slings with fall chains between the main crane hooks, and the spatial position of the temporary guide platform is adjusted by the fall chains so that the embedded bolt holes of the temporary guide platform segments are matched one by one with the corresponding bolts of the starting platform.

5. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (6), four splayed inclined wheels are installed correspondingly before the rear half of the No. 1 trailer is lowered into the well, and some top-level equipment is installed on the top before it is lifted down into the well and translated.

6. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (7), two eight-shaped inclined wheels are installed correspondingly before the front half of the No. 1 trailer is lowered into the well, and after it is lowered into the well, a jack is arranged below it to adjust its spatial position so that it is connected with the corresponding bolts of the rear half of the No. 1 trailer.

7. The shield machine crane assembly method according to claim 6 is characterized in that in the step (7), an auxiliary crane is set at the main wellhead, and the rear half of the No. 1 trailer is lifted and the spatial position is adjusted through two lifting points set at the front end of the rear half of the No. 1 trailer within the range of the main wellhead, so that it is connected to the front half of the No. 1 trailer accordingly.

8. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (9), the supports corresponding to the No. 4 and No. 6 shield bodies are made of 175 or 200 steel, and a pre-buried steel plate is provided at the corresponding position of the bottom of the well, and the supports are fixedly connected to the pre-buried steel plate.

9. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (9) or (10), after the support wheels are lowered into the corresponding connecting bridge, round tube piers are placed under the connecting bridge, and the support wheel pairs are welded at corresponding positions. After the welding is completed, the round tube piers are removed.

10. The shield machine crane assembly method according to claim 1 is characterized in that, in the step (11), the main drive turning over adopts two crawler cranes as the main crane and auxiliary crane respectively, first the two crawler cranes are lifted simultaneously to a certain height of the main drive from the ground, then the main crane is lifted and the auxiliary crane is lowered at the same time until the auxiliary crane is completely free of force, finally the main crane is lowered and the auxiliary crane lifting tooling is removed and then the main crane is lowered into the well for corresponding installation.