阅读说明：本技术 一种敞开式tbm施工方法、支护系统及其支护方法 (Open type TBM construction method, support system and support method thereof ) 是由 贺飞 张啸 王亚威 潘守辰 高翔 张玉香 任梓恒 史乘百 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种敞开式TBM施工方法、支护系统及其支护方法,包括设置在主梁上的回转环,回转环连接有预装钢拱架的钢拱架托架及用于安装管片的管片拼装装置,主梁上还设置有径向撑紧机构,回转环和径向撑紧机构分别通过第一轴向伸缩单元和第二轴向伸缩单元活动设置在主梁上；施工方法包括钢拱架拼装模式、管片拼装模式、钢拱架拼装模式切换到管片拼装模式及管片拼装模式切换到钢拱架拼装模式。本发明在保证传统安装钢拱架的拱架安装功能的同时,增加了管片的安装功能,可实现钢拱架、管片两种拼装模式的自由、快速切换,实现TBM通过不良地质时盾尾形成快速封闭的支护形式；保证TBM设备及人员的安全、提升了不良地质条件下的施工效率,提升了工效。(The invention discloses an open TBM construction method, a support system and a support method thereof, wherein the open TBM construction method comprises a revolving ring arranged on a main beam, the revolving ring is connected with a steel arch bracket pre-installed with a steel arch and a segment assembling device used for installing segments, the main beam is also provided with a radial tensioning mechanism, and the revolving ring and the radial tensioning mechanism are respectively and movably arranged on the main beam through a first axial telescopic unit and a second axial telescopic unit; the construction method comprises a steel arch assembling mode, a segment assembling mode, a steel arch assembling mode switching to the segment assembling mode and a segment assembling mode switching to the steel arch assembling mode. The invention ensures the arch mounting function of the traditional steel arch, increases the segment mounting function, can realize the free and rapid switching of two splicing modes of the steel arch and the segment, and realizes the formation of a rapid closed supporting form of the shield tail when the TBM passes through unfavorable geology; the safety of TBM equipment and personnel is guaranteed, the construction efficiency under adverse geological conditions is improved, and the work efficiency is improved.)

1. An open TBM construction method is characterized in that: when the steel arch frames need to be assembled, the steel arch frames (8) are fixed on a rotary ring (3) positioned in a shield (16), a driving device (4) is controlled to drive the rotary ring (3) to rotate, the steel arch frames (8) connected with the previous steel arch frame (8) are sequentially fixed on the rotary ring (3) and assembled into a whole ring, a radial tightening mechanism (6) is controlled to take the steel arch frames (8) of the whole ring down from the rotary ring (3), the radial tightening mechanism (6) is controlled to move to the rear of the shield (16), and the radial tightening mechanism (6) is controlled to tightly prop the steel arch frames (8) of the whole ring to the hole wall to complete the support of one steel arch frame; when the segment is assembled to needs, install segment assembly device (13) on slewing ring (3), control segment assembly device (13) snatch segment (5), control drive arrangement (4) drive slewing ring (3) and rotate to appointed hoop position, will follow slewing ring (3) synchronous revolution's segment (5) and installed segment (5) fixed connection, move all the other segments (5) in the messenger whole ring in proper order with installed segment (5) fixed connection more than the repetition.

2. A supporting system of an open TBM construction method is characterized in that: support ring (2) and radial tight mechanism (6) of propping that set up on girder (1) including the endwise slip, radially prop tight mechanism (6) and be located the rear of support ring (2), support ring (2) are connected with slewing ring (3) through drive arrangement (4) gyration, slewing ring (3) are connected with steel bow member bracket (15), steel bow member bracket (15) can be dismantled and are connected with section of jurisdiction and assemble device (13), radially prop the preceding extreme position of tight mechanism (6) and support ring (2) and all be located shield (16), back extreme position all is located shield (16) rear.

3. The support system of claim 2, wherein: the support ring (2) is arranged on the main beam (1) in a sliding mode through the first axial telescopic unit (9), and the radial tightening mechanism (6) is arranged on the main beam (1) in a sliding mode through the second axial telescopic unit (10).

4. The support system of claim 3, wherein: the first axial telescopic units (9) and the second axial telescopic units (10) are arranged in pairs, and each pair of first axial telescopic units (9) and each pair of second axial telescopic units (10) are respectively arranged on two sides of the main beam (1).

5. The support system of claim 3 or 4, wherein: the main beam (1) is provided with an axial walking track (11), and the support ring (2) and the radial tightening mechanism (6) are arranged on the main beam (1) in a sliding mode through the walking track (11).

6. The support system of claim 5, wherein: the four walking tracks (11) are arranged, the left side and the right side of the main beam (1) are respectively provided with two walking tracks (11), the walking tracks (11) on the two sides of the main beam (1) are symmetrical to each other, and the two walking tracks (11) on the same side are symmetrical up and down.

7. The support system of claim 6, wherein: the first axial telescopic unit (9) and the second axial telescopic unit (10) are hydraulic cylinder mechanisms, gear rack mechanisms, belt transmission mechanisms, pneumatic cylinder mechanisms, linear motor mechanisms or electric push rod mechanisms.

8. The support system of any one of claims 2-4, 6-7, wherein: the rotary ring (3) is connected with a connecting plate (14), the segment assembling device (13) comprises a lifting oil cylinder (17) connected with the connecting plate (14), the lifting oil cylinder (17) is connected with a connecting beam (12), and the connecting beam (12) is connected with a segment grabbing assembly (18).

9. The support system of claim 8, wherein: the connecting plates (14) are symmetrically arranged, each connecting plate (14) is connected with a lifting oil cylinder (17), and the connecting beam (12) is arranged between the two lifting oil cylinders (17).

10. The support system of any one of claims 2-4, 6-7, 9, wherein: the driving device (4) comprises a hydraulic motor or a motor arranged on the support ring (2), the hydraulic motor or the motor is connected with a pinion, a gear ring meshed with the pinion is arranged on the rotary ring (3), and an annular track matched with the support ring (2) is arranged on the rotary ring (3).

11. The support system of claim 10, wherein: the radial tightening mechanism (6) is connected with a working platform (7), the working platform (7) comprises an arc supporting table for connecting the steel arch frame and the segment, and the radial tightening mechanism (6) is arranged on the main beam (1) in a sliding mode through the working platform (7).

12. A method of bracing a bracing system according to any one of claims 2 to 11, wherein: the method comprises the steps of switching a steel arch assembling mode, a segment assembling mode and a steel arch assembling mode and a segment assembling mode, wherein the switching of the steel arch assembling mode and the segment assembling mode comprises switching the steel arch assembling mode to the segment assembling mode and switching the segment assembling mode to the steel arch assembling mode;

the steel arch assembling mode comprises the following steps:

firstly, fixing a first steel arch frame (8) on a rotary ring (3) positioned in a shield (16);

secondly, controlling a driving device (4) to drive the rotary ring (3) to rotate;

thirdly, steel arches (8) connected with the previous steel arch (8) are sequentially fixed on the revolving ring (3) and are assembled into a whole ring;

controlling the radial tensioning mechanism (6) to take the steel arch frame (8) of the whole ring down from the rotary ring (3);

controlling the second axial telescopic unit (10) to move the radial tightening mechanism (6) to the rear of the shield (16), and controlling the radial tightening mechanism (6) to tightly push the whole ring of steel arch frames (8) to the wall of the hole to complete the support of one steel arch frame;

the segment assembling mode comprises the following steps:

after the duct pieces (5) are conveyed to the assembling area, the duct piece assembling device (13) is controlled to grab the duct pieces (5); seventhly, controlling a driving device (4) to drive the rotary ring (3) to rotate to a specified annular position, and fixedly connecting the segment (5) rotating synchronously with the rotary ring (3) with the installed segment (5);

repeating the actions to ensure that the rest segments (5) in the whole ring are fixedly connected with the installed segments (5) in sequence;

the mode of switching the steel arch assembling mode to the segment assembling mode is as follows:

a segment assembling device (13) is arranged on a connecting plate (14) of the rotary ring (3); connecting a hydraulic pipeline and a connector, connecting an electric appliance quick connector and switching an operating system to a segment assembling mode;

when the segment assembling mode is switched to the steel arch assembling mode, the operating system is switched to the steel arch assembling mode, the electric and hydraulic pipelines are disconnected, and the segment assembling device (13) is detached from the connecting plate (14).

Technical Field

The invention relates to the technical field of open TBMs, in particular to an open TBM construction method, a support system and a support method thereof.

Background

In recent years, with the massive construction of tunnels and underground engineering, the development of the underground engineering technology in China is greatly promoted, a plurality of new technical challenges are brought, and the large burial depth, the long distance and the large hole diameter become the main characteristics of the current tunnel engineering. The construction of the open-type TBM has the advantages that the shield is short in length, surrounding rocks at the rear part of the shield tail are exposed, and the initial support is conveniently carried out by applying a steel arch frame, an anchor rod and emergency mixed spraying. However, under complex geological conditions, when unfavorable geology such as broken zones and rockburst sections is encountered, surrounding rocks are unstable, phenomena such as large-scale slag falling, broken stones and even collapse can occur, the supporting shoe part is difficult to provide supporting reaction force to meet the propelling requirement, and great safety threat is brought to the safety of field constructors and equipment. When the tunnel passes through a bad geological tunnel section, a TBM cross construction process is required in the traditional construction method, the tunneling efficiency is greatly reduced due to the increase of the cross construction process, and the advantages of high efficiency and rapidness of an open-type TBM cannot be exerted. Therefore, when the tunnel passes through unfavorable geology, how to improve the work efficiency and ensure that the equipment is efficient, safe and rapid in tunneling is the most important factor.

The duct piece is quickly installed at the shield tail of the open TBM, and the closed support is an effective solution. The existing open-type TBM steel arch mounting device cannot simultaneously meet the mounting mode of a steel arch and a duct piece. For example, the invention patent application with application publication date of 2019.05.31 and application publication number of CN109826637A discloses a double-structure TBM and a construction method thereof, the double-structure TBM comprises a shield with a shield body propulsion oil cylinder circumferentially arranged, a main drive is connected in the shield through the shield body oil cylinder, the front part of the main drive is connected with a cutter head, the rear part of the main drive is connected with a main beam, a spray anchor supporting and tunneling unit and a segment supporting and tunneling unit are arranged on the main beam, the spray anchor supporting and tunneling unit comprises a steel arch truss assembling machine, a roof-bolter and a concrete spraying manipulator, the rear part of the roof-bolter is provided with a main beam propulsion oil cylinder, the front end of the main beam propulsion oil cylinder is hinged on the main beam, the rear end of the main beam propulsion oil cylinder is hinged with a supporting shoe unit, the supporting shoe unit is arranged in a sliding manner along the axis of the main beam, the rear part of the supporting shoe unit is provided with a rear supporting unit in a sliding manner, the supporting and the segment assembling machine, the steel arch truss assembling machine, the segment assembling machine, the rear part of the supporting shoe unit, the segment assembling machine, the rear part of the main beam assembling machine, the segment assembling machine, the rear part of the supporting shoe unit, the segment assembling machine, the rear part of the main beam, the segment assembling machine, the main beam assembling machine, the segment assembling machine, the rear part of the segment assembling machine, the main beam assembling machine, the rear part of the segment assembling machine, the rear part of the segment assembling machine, the rear part of the segment assembling machine, the main beam assembling machine, the rear part of the segment assembling machine, the rear part of the segment assembling machine, the rear part of, Roofbolter and concrete spraying manipulator all set up the rear at the shield.

Although the technical scheme of the invention can realize the conversion between the spray anchor support tunneling mode and the segment support tunneling mode, the segment erector and the steel arch erector are designed integrally, and a specific structure is not disclosed, so that the integrally designed segment erector and the integrally designed steel arch erector have the defects of occupying a smaller construction space, influencing relatively independent cross construction procedures and further influencing the construction progress; the positions of the integrally designed segment erector and the steel arch truss erector are fixed, and specific supporting cannot be carried out on specific positions according to actual supporting requirements in the tunnel; and can only be set up and construct in the shield outside, receive the environmental impact outside the shield when carrying out section of jurisdiction pre-installation and steel bow member pre-installation big, still have certain potential safety hazard. In addition, the technical scheme of the patent application focuses on the radial tightening mechanism, and mainly solves the problems that how the radial tightening mechanism is tightened to provide forward counter force and how to change steps, and cannot solve the problem that how to freely switch steel arch support and tunnel support according to the support requirements of different positions when the radial tightening mechanism passes through unfavorable geology such as a broken zone and a rockburst section.

Disclosure of Invention

Aiming at the defects in the background art, the invention provides an open type TBM construction method, a support system and a support method thereof, and solves the technical problems that the existing open type TBM cannot meet the support requirements of different positions to freely switch steel arch support and tunnel support, and is greatly influenced by construction environment.

The technical scheme of the invention is realized as follows: an open TBM construction method comprises the steps that when steel arch frames need to be assembled, the steel arch frames are fixed on a rotary ring located in a shield, a control driving device drives the rotary ring to rotate, the steel arch frames connected with the previous steel arch frames are sequentially fixed on the rotary ring and assembled into a whole ring, a radial tightening mechanism is controlled to take the steel arch frames of the whole ring down from the rotary ring, the radial tightening mechanism is controlled to move to the rear of the shield, and the radial tightening mechanism is controlled to tightly press the steel arch frames of the whole ring to a hole wall to complete supporting of one steel arch frame; when the section of jurisdiction is assembled to needs, install the section of jurisdiction on the slewing ring and assemble the device, control section of jurisdiction is assembled the device and is snatched the section of jurisdiction, and control drive arrangement drives the slewing ring and rotates to appointed hoop position, will follow slewing ring synchronous revolution's section of jurisdiction and the section of jurisdiction fixed connection of having installed, and action more than the repetition makes all the other sections of jurisdiction in the whole ring in proper order with the section of jurisdiction fixed connection of having installed. By adopting the method, the function of assembling the steel arch centering by the traditional TBM can be ensured, meanwhile, the function of installing the duct piece is added, and the free conversion of an assembling mode is realized; the safety of TBM equipment and personnel is guaranteed, the construction efficiency under adverse geological conditions is improved, and the work efficiency is improved.

A supporting system of an open TBM construction method comprises a supporting ring and a radial tightening mechanism which are axially and slidably arranged on a main beam, wherein the supporting ring and the radial tightening mechanism can slide along the main beam, so that the positions are changed, and the operation requirements of different procedures and different stations are met. The radial tightening mechanism is positioned behind the support ring and can take down a pre-installed steel arch on the support ring through radial expansion. The supporting ring is connected with a rotary ring through a driving device in a rotating mode, the rotary ring can rotate around the supporting ring in the circumferential direction under the action of the driving device and is connected with a steel arch bracket, the steel arch bracket can be preassembled into a ring on the steel arch bracket when the rotary ring rotates, a radial tensioning mechanism is convenient to take the steel arch bracket down, and the steel arch bracket which is driven by the radial tensioning mechanism to form the ring slides to an installation station along the girder. The steel arch support can be dismantled and be connected with the section of jurisdiction and assemble the device, and the section of jurisdiction that the device was assembled to the section of jurisdiction can take to snatch is along with slewing ring synchronous revolution, and the section of jurisdiction that the device was assembled to the section of jurisdiction can take to snatch slides along the girder along with the support ring. The front limit positions of the radial tightening mechanism and the support ring are located in the shield, and the rear limit positions of the radial tightening mechanism and the support ring are located behind the shield, so that the grabbing of the duct piece and the pre-assembling of the steel arch can be carried out in the shield, and meanwhile, the assembling of the duct piece and the assembling of the steel arch can be carried out at any position.

Furthermore, the support ring is arranged on the girder in a sliding mode through the first axial telescopic unit, the radial tightening mechanism is arranged on the girder in a sliding mode through the second axial telescopic unit, and the support ring and the radial tightening mechanism can be conveniently driven to move along the girder by controlling the first axial telescopic unit and the second axial telescopic unit.

Furthermore, the first axial telescopic units and the second axial telescopic units are arranged in pairs, and each pair of first axial telescopic units and each pair of second axial telescopic units are respectively arranged on two sides of the main beam, so that the uniformity of push-pull stress can be ensured, the action is more stable and smooth, the spaces on two sides of the main beam can be fully utilized, the whole mechanism is compact, and the space is saved.

Furthermore, be provided with axial walking track on the girder, support ring and radial tightening mechanism slide through the walking track and set up at the girder, and the walking track not only provides the counter-force when assembling section of jurisdiction or steel bow member, has promoted the stability that support ring and radial tightening mechanism position removed moreover.

Furthermore, four walking tracks are arranged, two walking tracks are respectively arranged on the left side and the right side of the main beam, the walking tracks on the two sides of the main beam are mutually symmetrical, and the two walking tracks on the same side are vertically symmetrical, so that the main beam is more uniform in stress and smoother in action.

Furthermore, the first axial telescopic unit and the second axial telescopic unit are hydraulic cylinder mechanisms, gear rack mechanisms, belt transmission mechanisms, pneumatic cylinder mechanisms, linear motor mechanisms or electric push rod mechanisms, and the support ring and the radial tightening mechanism can be driven to axially slide.

Further, the slewing ring is connected with the connecting plate, and the device is assembled to the section of jurisdiction includes the promotion hydro-cylinder that links to each other with the connecting plate, and the promotion hydro-cylinder is used for the radial removal of section of jurisdiction in the tunnel, and the promotion hydro-cylinder is connected with the tie-beam, and the tie-beam is connected with the section of jurisdiction and grabs the assembly, grabs the assembly and is used for realizing grabbing of section of jurisdiction and lifting the fine setting of section of jurisdiction gesture.

Furthermore, the connecting plates are symmetrically provided with two connecting plates, each connecting plate is connected with a lifting oil cylinder, the connecting beam is arranged between the two lifting oil cylinders, the space inside the rotary ring is fully utilized, and the structural reliability and stability are improved.

Furthermore, the driving device comprises a hydraulic motor or a motor arranged on the support ring, the hydraulic motor or the motor is connected with a pinion, a gear ring meshed with the pinion is arranged on the rotary ring, and an annular track matched with the support ring is arranged on the rotary ring.

Further, radially prop tight mechanism and be connected with work platform, work platform is including the arc brace table that is used for the steel bow member to connect and the section of jurisdiction is connected, and the arc brace table is connected for the steel bow member and is tightened the operation such as bolt and provide the place between bolt and the steel bow member, radially prop tight mechanism and pass through work platform slip setting on the girder.

A supporting method of a supporting system of an open TBM construction method comprises a steel arch assembling mode, a segment assembling mode, and switching of the steel arch assembling mode and the segment assembling mode, wherein the switching of the steel arch assembling mode and the segment assembling mode comprises switching of the steel arch assembling mode to the segment assembling mode and switching of the segment assembling mode to the steel arch assembling mode;

the steel arch assembling mode comprises the following steps:

firstly, fixing a first steel arch on a rotary ring in a shield;

controlling a driving device to drive the rotary ring to rotate;

fixing the steel arches connected with the previous steel arch on the slewing ring in sequence, and assembling the steel arches into a whole ring;

fourthly, controlling the radial tensioning mechanism to take the steel arch centering of the whole ring down from the rotary ring;

controlling the second axial telescopic unit to move the radial tensioning mechanism to the rear of the shield, and controlling the radial tensioning mechanism to tightly push the whole ring of steel arch frames to the hole wall to complete the support of one steel arch frame;

the segment assembling mode comprises the following steps:

sixthly, after the duct pieces are conveyed to the assembling area, controlling the duct piece assembling device to grab the duct pieces;

seventhly, controlling a driving device to drive the rotary ring to rotate to a specified annular position, and fixedly connecting the segment synchronously rotating with the rotary ring with the installed segment;

repeating the actions to ensure that the rest segments in the whole ring are fixedly connected with the installed segments in sequence;

the mode of switching the steel arch assembling mode to the segment assembling mode is as follows:

a segment assembling device is arranged on a connecting plate of the revolving ring; connecting a hydraulic pipeline and a connector, connecting an electric appliance quick connector and switching an operating system to a segment assembling mode;

when the segment assembling mode is switched to the steel arch assembling mode, the operating system is switched to the steel arch assembling mode, the electric and hydraulic pipelines are disconnected, and the segment assembling device is detached from the connecting plate.

The technical scheme of the invention has the beneficial effects that: the mounting function of the segment is increased while the mounting function of the traditional steel arch mounting is ensured, the free and quick switching of two splicing modes of the steel arch and the segment can be realized, and the shield tail forms a quick and closed supporting form when the TBM passes through unfavorable geology; the safety of TBM equipment and personnel is guaranteed, the construction efficiency under adverse geological conditions is improved, and the work efficiency is improved.

Drawings

In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view taken along plane A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

in the figure: 1. a main beam; 2. a support ring; 3. a slewing ring; 4. a drive device; 5. a duct piece; 6. a radial bracing mechanism; 7. a working platform; 8. a steel arch frame; 9. a first axial telescopic unit; 10. a second axial telescopic unit; 11. a traveling rail; 12. a connecting beam; 13. a segment assembling device; 14. a connecting plate; 15. a steel arch support; 16. a shield; 17. lifting the oil cylinder; 18. segment gripper assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Embodiment 1, a construction method of an open TBM, as shown in fig. 1, this embodiment mainly relates to assembly of steel arches and assembly of segments.

When the steel arch frames need to be assembled, the steel arch frames 8 are fixed on the rotary rings 3 in the shields 16, the control driving device 4 drives the rotary rings 3 to rotate, the steel arch frames 8 connected with the previous steel arch frames 8 are sequentially fixed on the rotary rings 3 and assembled into a whole ring, the radial tightening mechanisms 6 are controlled to take down the steel arch frames 8 in the whole ring from the rotary rings 3, the radial tightening mechanisms 6 are controlled to move to the rear of the shields 16, and the radial tightening mechanisms 6 are controlled to tightly push the steel arch frames 8 in the whole ring to the hole wall to complete the support of one steel arch frame.

When the section of jurisdiction is assembled to needs, install section of jurisdiction assembly device 13 on slewing ring 3, control section of jurisdiction assembly device 13 snatchs section of jurisdiction 5, and control drive arrangement 4 drives slewing ring 3 and rotates to appointed hoop position, will be along with 3 synchronous revolution's of slewing ring section of jurisdiction 5 and the section of jurisdiction 5 fixed connection installed, and action more than the repetition makes all the other sections of jurisdiction 5 in the whole ring in proper order with section of jurisdiction 5 fixed connection installed. By adopting the method, the function of assembling the steel arch centering by the traditional TBM can be ensured, meanwhile, the function of installing the duct piece is added, and the free conversion of an assembling mode is realized; the safety of TBM equipment and personnel is guaranteed, the construction efficiency under adverse geological conditions is improved, and the work efficiency is improved.

Embodiment 2, a supporting system of an open TBM construction method, as shown in fig. 1 to 3, includes a support ring 2 and a radial bracing mechanism 6 that are axially slidably disposed on a main beam 1, where the support ring 2 and the radial bracing mechanism 6 can both slide along the main beam 1 to change positions, thereby meeting operation requirements of different processes and different stations. Radially prop tight mechanism 6 and be connected with work platform 7, work platform 7 is including the arc brace table that is used for the steel bow member to connect and the section of jurisdiction is connected, and the arc brace table is connected for the steel bow member and is beaten tight operations such as bolt between bolt and the steel bow member and provide the place, radially prop tight mechanism 6 and slide through work platform 7 and set up on girder 1.

Specifically, the support ring 2 is slidably disposed on the main beam 1 through a first axial telescopic unit 9, and the radial bracing mechanism 6 is slidably disposed on the main beam 1 through a second axial telescopic unit 10. The first axial telescopic unit 9 and the second axial telescopic unit 10 are hydraulic cylinder mechanisms, gear rack mechanisms, belt transmission mechanisms, pneumatic cylinder mechanisms, linear motor mechanisms or electric push rod mechanisms, and can drive the support ring 2 and the radial tightening mechanism 6 to axially slide. By controlling the first axial telescopic unit 9 and the second axial telescopic unit 10, the support ring 2 and the radial bracing mechanism 6 can be conveniently driven to move positions along the main beam 1. Be provided with axial walking track 11 on the girder 1, support ring 2 and radial tightening mechanism 6 slide through walking track 11 and set up at girder 1, and walking track 11 not only provides the counter-force of assembling section of jurisdiction 5 or steel bow member 8 time, has promoted the stability that support ring 2 and radial tightening mechanism 6 position removed moreover.

Furthermore, the first axial telescopic units 9 and the second axial telescopic units 10 are arranged in pairs, and each pair of the first axial telescopic units 9 and each pair of the second axial telescopic units 10 are respectively arranged on two sides of the main beam 1, so that the uniformity of push-pull stress can be ensured, the action is more stable and smooth, the spaces on two sides of the main beam 1 can be fully utilized, the whole mechanism is compact, and the space is saved.

Furthermore, four walking tracks 11 are arranged, two walking tracks 11 are respectively arranged on the left side and the right side of the main beam 1, the walking tracks 11 on the two sides of the main beam 1 are mutually symmetrical, and the two walking tracks 11 on the same side are vertically symmetrical, so that the stress is more uniform and the action is smoother.

The radial tightening mechanism 6 is positioned behind the support ring 2, and the steel arch 8 preassembled on the support ring 2 can be taken down by the radial tightening mechanism 6 through radial expansion. The supporting ring 2 is connected with a revolving ring 3 in a revolving way through a driving device 4, the revolving ring 3 can rotate around the supporting ring 2 in the circumferential direction under the action of the driving device 4, and the revolving ring 3 is connected with a steel arch bracket 15. When the rotary ring 3 rotates, the steel arch 8 can be preassembled on the steel arch bracket 15 into a ring, so that the radial tightening mechanism 6 can take the steel arch conveniently, and the radial tightening mechanism 6 drives the steel arch 8 which is formed into the ring to slide to an installation station along the girder 1.

The driving device 4 comprises a hydraulic motor or a motor arranged on the support ring 2 through a driving support, the hydraulic motor or the motor is connected with a pinion, a gear ring meshed with the pinion is arranged on the rotary ring 3, and an annular track matched with the support ring 2 is arranged on the rotary ring 3.

The steel arch support 15 can be dismantled and be connected with section of jurisdiction assembly device 13, and section of jurisdiction assembly device 13 can take the section of jurisdiction 5 of snatching along with slewing ring 13 synchronous revolution, and section of jurisdiction assembly device 13 can take the section of jurisdiction 5 of snatching along with support ring 2 along girder 1 slip. The front limit positions of the radial tightening mechanism 6 and the support ring 2 are both positioned in the shield 16, the rear limit position is positioned behind the shield 16, the grabbing of the duct piece 5 and the pre-assembling of the steel arch 8 can be carried out in the shield 16, and meanwhile, the assembling of the duct piece 5 and the assembling of the steel arch 8 can be carried out at any position.

Specifically, the slewing ring 3 is connected with connecting plate 14, and the device 13 is assembled to the section of jurisdiction includes the promotion hydro-cylinder 17 that links to each other with connecting plate 14, and promotion hydro-cylinder 17 is used for the radial removal of section of jurisdiction in the tunnel, and promotion hydro-cylinder 17 is connected with tie-beam 12, and tie-beam 12 is connected with the section of jurisdiction and grabs and lifts assembly 18, grabs and lifts assembly 18 and is used for realizing grabbing of section of jurisdiction 5 and lifting the fine setting of section of jurisdiction 5 gesture.

Furthermore, the connecting plates 14 are symmetrically arranged, each connecting plate 14 is connected with a lifting oil cylinder 17, the connecting beam 12 is arranged between the two lifting oil cylinders 17, the space inside the rotary ring 3 is fully utilized, and the structural reliability and stability are improved.

Embodiment 3, a supporting method of a supporting system of an open TBM construction method, includes a steel arch splicing mode, a segment splicing mode, and a switching of the steel arch splicing mode and the segment splicing mode, where the switching of the steel arch splicing mode and the segment splicing mode includes a switching of the steel arch splicing mode to the segment splicing mode and a switching of the segment splicing mode to the steel arch splicing mode;

the steel arch assembling mode comprises the following steps:

firstly, fixing a first steel arch 8 on a revolving ring 3 positioned in a shield 16;

secondly, controlling the driving device 4 to drive the revolving ring 3 to rotate;

thirdly, fixing steel arch frames 8 connected with the previous steel arch frame 8 on the revolving ring 3 in sequence, and assembling into a whole ring;

fourthly, the radial tensioning mechanism 6 is controlled to take the steel arch 8 of the whole ring down from the revolving ring 3;

controlling the second axial telescopic unit 10 to move the radial tensioning mechanism 6 to the rear of the shield 16, and controlling the radial tensioning mechanism 6 to tightly push the whole ring of steel arch 8 to the hole wall to complete the support of one steel arch;

the segment assembling mode comprises the following steps:

after the duct pieces 5 are conveyed to the assembling area, controlling the duct piece assembling device 13 to grab the duct pieces 5;

seventhly, controlling a driving device 4 to drive the rotary ring 3 to rotate to a specified annular position, and fixedly connecting the segment 5 synchronously rotating along with the rotary ring 3 with the installed segment 5;

repeating the actions to ensure that the rest segments 5 in the whole ring are fixedly connected with the installed segments 5 in sequence;

the mode of switching the steel arch assembling mode to the segment assembling mode is as follows:

a segment assembling device 13 is arranged on a connecting plate 14 of the revolving ring 3; connecting a hydraulic pipeline and a connector, connecting an electric appliance quick connector and switching an operating system to a segment assembling mode;

when the segment assembling mode is switched to the steel arch assembling mode, the operating system is switched to the steel arch assembling mode, the electric and hydraulic pipelines are disconnected, and the segment assembling device 13 is detached from the connecting plate 14.

The mechanical structure of this embodiment is the same as embodiment 2.

Nothing in this specification is intended to be exhaustive of all conventional and well known techniques.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.