CN219809020U

CN219809020U - Automatic laying device of TBM support net and TBM

Info

Publication number: CN219809020U
Application number: CN202223291860.4U
Authority: CN
Inventors: 王志强; 王亚威; 任梓恒; 郭明; 王涛; 鲁义强; 刘志飞
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-10-10
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to the field of TBM support net laying, in particular to an automatic TBM support net laying device and a TBM. The automatic laying device of the TBM support net comprises a shield body, a first support is arranged in the shield body, an unreeling support for placing the rolled support net is arranged on the first support, and when the shield body moves forwards in a tunnel, the rolled support net on the unreeling support is unfolded and laid on a tunnel wall. The automatic laying device for the TBM support net realizes the automatic laying of the support net by utilizing the forward tunneling of the TBM, reduces the labor intensity of constructors and improves the timeliness and the safety of construction. Moreover, the rolled support net has longer length under the condition of smaller occupied space, so that the replacement frequency of the support net is reduced, and the laying efficiency is improved.

Description

Automatic laying device of TBM support net and TBM

Technical Field

The utility model relates to the field of TBM support net laying, in particular to an automatic TBM support net laying device and a TBM.

Background

Tunnel support is a key step in tunnel TBM construction, and the main tunnel support means at present are steel arches and anchor rod supports. In some emergency situations, however, the shoring of the steel arches and anchors is not sufficient to achieve the shoring effect, and a shoring net, such as a reinforcing net, must be used as an auxiliary. Traditional reinforcing bar net mounting means is manual operation, because the installation environment of reinforcing bar net is very abominable, like strong vibration, many dust, dark moist, perhaps appears circumstances such as harmful gas, tunnel collapse even, leads to manual operation intensity of labour big, work efficiency is low, and has certain security risk.

The Chinese patent of the utility model with the publication number of CN202192411U discloses a rapid supporting type reinforcing mesh installation device of a tunnel boring machine, which comprises a shield and an arc plate arranged on the inner side of the shield, wherein a partition plate is arranged between the arc plate and the shield, and a plurality of partition plates are arranged at intervals along the circumferential direction of the shield to form a plurality of reinforcing mesh storage bins for placing reinforcing meshes. The interval between two baffles is greater than or equal to the width of the reinforcing mesh, and the width of the arc plate is greater than or equal to the length of the reinforcing mesh. When installing the reinforcing bar net piece, insert prefabricated reinforcing bar net piece in storing the storehouse from the side that is close to the blade disc, the one end of reinforcing bar net piece overlaps with the reinforcing bar net piece that has been installed with the lead wire, along with TBM tunneling forward, the reinforcing bar net is pulled out gradually from storing the storehouse and laid on the rock face to realize the continuous installation of reinforcing bar net piece.

In the above-mentioned technique, because of the length restriction that leads to the reinforcing bar net piece relatively short by the arc, need frequently install new reinforcing bar net piece and lay the rock face in TBM tunneling process, lead to laying efficiency lower.

Disclosure of Invention

The utility model aims to provide an automatic laying device for a TBM support net, which aims to solve the technical problem of lower laying efficiency caused by the fact that new reinforcing steel meshes are required to be frequently installed to lay a rock surface when a TBM is tunneled in the prior art; it is also an object of the present utility model to provide a TBM to address the above problems.

In order to achieve the above purpose, the technical scheme of the automatic laying device of the TBM support net of the utility model is as follows:

the automatic laying device of the TBM support net comprises a shield body, wherein a first support is arranged in the shield body, an unreeling support for placing the reeled support net is arranged on the first support, and when the shield body moves forwards in a tunnel, the reeled support net which is reeled on the unreeling support is unfolded and laid on a tunnel wall.

The beneficial effects are that: when the support net is required to be laid, the support net is manually pulled out from the unreeling support and extends out of the upper part of the shield body; then, fixing the end part of the support net on the wall of the hole; then TBM is tunneled forward, the shield body moves forward to drive the unreeling support to move forward, so that the support net is pulled out and laid on the top of the tunnel wall, and the support net laying and TBM tunneling are synchronized. The labor intensity of constructors is reduced, and the timeliness and safety of construction are improved; the rolled support net has longer length under the condition of smaller occupied space, so that the replacement frequency of the support net is reduced, and the laying efficiency is improved.

As a further improvement, the unreeling support is a rotary unreeling support.

The beneficial effects are that: the design is favorable for reducing friction force and is convenient for the unfolding of the support net.

As a further improvement, the rotary unreeling support comprises a first central shaft and a first rotary drum rotatably assembled on the first central shaft, the first bracket comprises two first supporting arms positioned at two ends of the first central shaft, and the two ends of the first central shaft are respectively and detachably fixed on the two first supporting arms.

The beneficial effects are that: by the design, the rotary unreeling support is convenient to detach from the first support, and the reeled support net is convenient to replace.

As a further improvement, the first support arms are provided with pressing plates with grooves and sealing grooves, and two ends of the first central shaft are respectively fixed on the two first support arms through the pressing plates.

The beneficial effects are that: the design is favorable for disassembling and assembling the rotary unreeling support under the condition of ensuring the stability of the rotary unreeling support.

As a further improvement, the center line of the unreeling support is perpendicular to the different plane of the center line of the shield body.

The beneficial effects are that: by the design, the traction force of the shield body is the same as the laying direction of the support net, and the laying of the rolled support net is facilitated.

As a further improvement, at least two first brackets are arranged at intervals along the circumferential direction of the shield body, and each first bracket is provided with the unreeling support.

The beneficial effects are that: by the design, a large supporting area can be paved as required.

As a further improvement, a second bracket is arranged on the shield wall of the shield body, and a reversing support for reversing the support net is arranged on the second bracket.

The beneficial effects are that: through the switching-over of switching-over support for unreel the support and can keep away from the shield wall of shield body, thereby can increase the winding radius of support net on the unreeling support, further reduce the change frequency of support net.

As a further improvement, a bearing is provided between the first rotary drum and the first central shaft.

The beneficial effects are that: by the design, the friction force generated when the first rotary cylinder rotates can be reduced, and the smoothness of the rotation of the first rotary cylinder is ensured.

As a further improvement, limiting plates for limiting the supporting net are respectively arranged at the two axial ends of the first rotary cylinder.

The beneficial effects are that: the limiting plate is used for limiting the supporting net in the axial direction of the first rotary cylinder, and the supporting net is prevented from swinging in the unreeling process.

In order to achieve the above purpose, the technical scheme of the TBM of the utility model is as follows:

TBM, including TBM support net automatic paving device and girder, sliding fit has the jumbolter that is used for passing through the stock with the support net and fixes on the wall of the cave on the girder, and TBM support net automatic paving device includes the shield body, is equipped with first support in the shield body, is equipped with the unreeling support that is used for placing the support net of lapping on the first support, unreels the support net of lapping on supporting and unroll and lay on the wall of the cave when the shield body moves forward in the tunnel.

As a further improvement, the unreeling support is a rotary unreeling support.

Drawings

FIG. 1 is a schematic structural view of example 1 of the TBM of the present utility model;

FIG. 2 is a schematic view of the structure in the direction A-A in FIG. 1;

FIG. 3 is a partial cross-sectional view of the unwind support of FIG. 2;

FIG. 4 is a schematic structural diagram of example 2 of the TBM of the present utility model.

In the figure: 11. a cavity wall; 12. a shield body; 13. unreeling and supporting; 14. a reversing support; 15. a support net; 16. nut sealing plates; 17. a bolt; 18. roof bolter; 19. a main beam; 20. a first support arm; 21. a limiting plate; 22. a first central axis; 23. a first rotary drum; 24. a bearing; 25. and a second support arm.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "front," "rear," "upper," "lower," "left," and "right" are based on the orientation and positional relationship shown in the drawings, and are merely for convenience of description of the utility model, and do not denote that the device or component in question must have a particular orientation, and thus should not be construed as limiting the utility model.

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

Example 1 of TBM of the utility model:

as shown in fig. 1, the TBM comprises an automatic TBM supporting net laying device and a main beam 19, the automatic TBM supporting net laying device comprises a shield body 12, an unreeling support 13 and a reversing support 14 are arranged in the shield body 12, the unreeling support 13 and the reversing support 14 are both arranged one, the unreeling support 13 is located right above the main beam 19, and the reversing support 14 is located right above the unreeling support 13. Wherein the reversing support 14 is arranged on the shield wall of the shield body 12. In other embodiments, more than two unreeling supports and reversing supports may be provided as desired.

In this embodiment, the unreeling support 13 and the reversing support 14 are both disposed at the rear end of the shield body 12. The design is such that the distance of movement of the support net 15 is short and does not interfere with other components within the shield body 12.

As shown in fig. 2 and 3, a first bracket is provided in the shield body 12, and an unreeling support 13 is mounted on the first bracket. Specifically, the unreeling support 13 is a rotary unreeling support, and the unreeling support 13 includes a first central shaft 22 and a first rotary drum 23 rotatably mounted on the first central shaft 22, and the first rotary drum 23 is used for placing the rolled supporting net 15. The first bracket comprises two first supporting arms 20 positioned at two ends of a first central shaft 22, the two first supporting arms 20 are fixed on the shield body 12, and two ends of the first central shaft 22 are respectively and detachably fixed on the two first supporting arms 20.

In this embodiment, the first support arms 20 are provided with pressing plates for covering the grooves, and two ends of the first central shaft 22 are respectively fixed on the two first support arms 20 through the pressing plates.

In this embodiment, bearings 24 are respectively disposed between the two ends of the first central shaft 22 and the first rotary drum 23, so as to reduce friction force when the first rotary drum 23 rotates and ensure smooth rotation of the first rotary drum 23.

In this embodiment, two axial ends of the first rotary drum 23 are respectively provided with a limiting plate 21, and the two limiting plates 21 are used for limiting the supporting net 15 in the axial direction of the first rotary drum 23, so as to avoid the supporting net 15 from swinging in the unreeling process.

As shown in fig. 1 to 3, the rotation axis of the first rotary drum 23 is perpendicular to the center line of the shield body 12 so that the laying direction of the support net 15 is the same as the advancing direction of the shield body 12, facilitating the laying of the support net 15.

As shown in fig. 1 and 2, a second bracket is fixed to the shield wall of the shield body 12, and a ring-shaped support is provided on the second bracket. Specifically, the reversing support comprises a second central shaft and a second rotary drum rotatably assembled on the second central shaft, the second rotary drum is used for reversing the supporting net 15, the second bracket comprises second supporting arms 25 positioned at two ends of the second central shaft, the two second supporting arms 25 are fixed on the shield body 12, and two ends of the second central shaft are respectively fixed on the two second supporting arms 25.

In this embodiment, bearings are respectively disposed between two ends of the second central shaft and the second rotary drum, so as to reduce friction force when the second rotary drum rotates, and ensure smooth rotation of the second rotary drum.

In this embodiment, two ends of the second rotary cylinder are respectively provided with a limiting plate 21, and the two limiting plates 21 are used for limiting the supporting net 15 in the axial direction of the second rotary cylinder, so as to avoid the supporting net 15 from swinging in the laying process.

In this embodiment, the support net 15 is a reinforcing mesh. In other embodiments, the support mesh may be other metal mesh used for support.

In this embodiment, the main beam 19 is slidably equipped with a bolter 18, and the bolter 18 is used to fix the support net 15 to the wall 11 through the nut seal plate 16 and the bolts 17.

When the support net 15 is required to be laid, the support net 15 is manually pulled out from the unreeling support 13, bypasses the reversing support 14 and extends out of the upper part of the shield body 12; then, holes are formed in the corresponding positions of the hole wall 11 through the jumbolter 18, the anchor rods 17 are penetrated, and the end parts of the supporting net 15 are fixed on the hole wall 11 through the nut sealing plates 16; then, the TBM is tunneled forward, the shield body 12 moves forward to drive the first rotary drum 23 to rotate on the first central shaft 22, so that the support net 15 is pulled out and laid on the top of the tunnel wall 11, and in the process, the anchor rod drilling machine 18 fixes the support net 15 at a set position by using the nut sealing plate 16 and the anchor rods 17, so that the support net 15 is laid and the TBM tunneled synchronously.

According to the utility model, the rolled support net is placed on the first revolving body, and the TBM tunneling is utilized to realize automatic rotation and unfolding of the support net, so that the labor intensity of constructors is reduced, and the timeliness and safety of construction are improved. Moreover, under the condition of small occupied space, the support net has a longer length, so that the replacement frequency of the support net is reduced, and the laying efficiency is improved.

Example 2 of TBM of the utility model:

the difference between this embodiment and embodiment 1 is that in embodiment 1, a reversing support 14 is provided on the shield body 12 above the unreeling support 13, and the reversing support 14 is provided on the side wall of the shield body 12. In this embodiment, as shown in fig. 4, the reversing support 14 is not disposed on the shield body 12, and the unreeling support 13 is disposed on a side wall of the shield body 12.

Example 3 of TBM of the utility model:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the rotation axis of the first rotation body is perpendicular to the different plane of the center line of the shield body, that is, the included angle between the rotation axis of the first rotation body and the center line of the shield body is 90 °. In this embodiment, the included angle between the rotation axis of the first rotation body and the center line of the shield body is 80 °. In other embodiments, the rotation axis of the first rotation body may be greater than 45 °.

Example 4 of TBM of the utility model:

the present embodiment differs from embodiment 1 in that in embodiment 1, the unreeling support is a rotary unreeling support. In this embodiment, the unreeling support is a fixed unreeling support, such as a fixed shaft fixed on the first bracket, so that the reeled supporting net is wound.

Example 5 of TBM of the utility model:

the present embodiment differs from embodiment 1 in that in embodiment 1, the unreeling support includes a first center shaft and a first rotary drum rotatably fitted on the first center shaft, both ends of the first center shaft being fixed to the first support arms, respectively. In this embodiment, the unreeling support only includes a first central shaft, and two ends of the first central shaft are rotatably assembled on the first support arm respectively. The first central shaft can be a solid shaft or a hollow shaft.

Example 6 of TBM of the utility model:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the first support arms are provided with a groove and a pressing plate covering the groove, and two ends of the first central shaft are respectively fixed on the two first support arms through the pressing plate. In this embodiment, the first support arm is not provided with a groove and a pressing plate, but is provided with a threaded hole, two ends of the first central shaft are respectively provided with a bolt perforation, and two ends of the first central shaft are respectively fixed on the two first support arms through bolts. Wherein the end of the first central shaft facing the side of the first support arm may be plane milled for increased stability.

Example 7 of TBM of the utility model:

the present embodiment differs from embodiment 1 in that in embodiment 1, a bearing is provided between the first rotary drum and the first center shaft. In this embodiment, the bearing is replaced by a polytetrafluoroethylene sleeve. In other embodiments, the first rotary cylinder may be made directly of polytetrafluoroethylene.

The embodiment of the automatic TBM support net laying device of the present utility model has the same structure as any one of the above TBM support net automatic laying devices in embodiments 1 to 7 of the TBM, and will not be described in detail herein.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

Automatic laying device of TBM support net, including shield body (12), its characterized in that is equipped with first support in the shield body (12), is equipped with on the first support to be used for placing unreeling support (13) of the support net (15) of lapping, unreels support net (15) of lapping on (13) and unwind and lay on tunnel wall (11) when shield body (12) are moved forward in the tunnel.
2. An automatic laying device for TBM support nets according to claim 1, characterized in that said unreeling support (13) is a rotary unreeling support.
3. An automatic laying device for TBM support nets according to claim 2, characterized in that the rotary unreeling support comprises a first central shaft (22) and a first rotary drum (23) rotatably mounted on the first central shaft (22), the first bracket comprises two first supporting arms (20) at both ends of the first central shaft (22), and both ends of the first central shaft (22) are detachably fixed on the two first supporting arms (20), respectively.
4. A TBM support net automatic laying apparatus as claimed in claim 3, characterized in that said first support arms (20) are provided with grooves and pressing plates covering the grooves, and both ends of the first central shaft (22) are respectively fixed to the two first support arms (20) through the pressing plates.
5. An automatic laying device for TBM support nets according to any one of claims 1 to 4, characterized in that the centre line of the unreeling support (13) is perpendicular to the centre line of the shield body (12).
6. The automatic laying device of the TBM support net according to any one of claims 1 to 4, wherein at least two first brackets are arranged at intervals along the circumferential direction of the shield body (12), and each first bracket is provided with the unreeling support (13).
7. An automatic laying device for a TBM support net according to any of claims 1 to 4, characterized in that a second support is provided on the shield wall of the shield body (12), and a reversing support (14) for reversing the support net (15) is provided on the second support.
8. An automatic laying device for TBM support nets according to claim 3 or 4, characterized in that a bearing (24) is provided between the first rotary drum (23) and the first central shaft (22).
9. The automatic laying device for TBM support nets according to claim 3 or 4, wherein limiting plates (21) for limiting the support nets are respectively arranged at the two axial ends of the first rotary drum (23).
TBM comprising an automatic laying device for a TBM support net and a main girder (19), the main girder (19) being slidingly equipped with a bolter (18) for fixing the support net (15) to the wall (11) of the tunnel through a bolter (17), characterized in that the automatic laying device for a TBM support net is a TBM support net automatic laying device according to any one of claims 1 to 9.