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CN113338958A - Shield and tunneling equipment of tunneling machine - Google Patents

Shield and tunneling equipment of tunneling machine Download PDF

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Publication number
CN113338958A
CN113338958A CN202110794370.7A CN202110794370A CN113338958A CN 113338958 A CN113338958 A CN 113338958A CN 202110794370 A CN202110794370 A CN 202110794370A CN 113338958 A CN113338958 A CN 113338958A
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CN
China
Prior art keywords
supporting
support
shield
tunnel
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110794370.7A
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Chinese (zh)
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CN113338958B (en
Inventor
仇文革
段东亚
陶伟明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Future Smart Tunnel Technology Co ltd
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Chengdu Future Smart Tunnel Technology Co ltd
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Priority to CN202110794370.7A priority Critical patent/CN113338958B/en
Publication of CN113338958A publication Critical patent/CN113338958A/en
Application granted granted Critical
Publication of CN113338958B publication Critical patent/CN113338958B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The shield of the heading machine comprises an inner support ring and a plurality of outer support modules, wherein the inner support ring is sleeved on a beam of the shield machine and can be connected with the beam of the shield machine through a connecting piece; the outer support module comprises a base and a plurality of supports, each base is connected with the inner support ring through a first telescopic module, and the first telescopic module is used for driving the corresponding outer support module to move along the radial direction of the inner support ring so as to enable the base to be supported on the inner wall of the tunnel; a plurality of support pieces all with base sliding fit, and every support piece all passes through the flexible module of second and pedestal connection, the flexible module of second is used for driving the support piece that corresponds along the radial motion of inner support ring to make a plurality of support piece homoenergetic support with the tunnel inner wall and hold. The support device can be suitable for supporting the inner wall of the large-scale variable-section tunnel, and is wide in application range, low in cost, good in protection effect and high in safety.

Description

Shield and tunneling equipment of tunneling machine
Technical Field
The invention relates to the field of tunnel construction equipment, in particular to a shield of a heading machine and heading equipment.
Background
At present, high-speed railways are increasingly constructed, and high-speed railways have extremely high requirements on smoothness of lines and gradient of the lines, so that the lines of the high-speed railways cannot turn at a large angle and have a large gradient. When the line passes through the mountain, the line cannot detour, but a tunnel form is adopted to pass through the mountain to ensure the smoothness of the high-speed rail line, so that more and more deep-buried long tunnels are formed in the existing tunnel. With the development of machinery and manufacturing industry, the mode of mechanical excavation by a heading machine is more and more widely applied, but the existing heading machine has poor adaptability to geology and cannot adapt to geological conditions under high ground stress conditions such as rock burst and large deformation. With the continuous development of the tunnel to the deep part, geological conditions such as rock burst, large deformation and the like are more and more common, and if a corresponding construction method is not adopted to overcome the conditions, the tunnel excavation can pay disastrous cost if the tunnel excavation meets the rock burst, the large deformation and the like. In the prior art, after a tunnel is excavated, due to the occurrence of rock burst and large deformation lag, a support invades into a boundary, so that secondary reworking of a tunnel support structure is caused.
The inventor researches and discovers that the existing tunneling equipment has the following defects:
the existing technology uses a fixed-section tunneling machine, which can not adapt to the tunneling construction of large-scale variable-section tunnels in the tunneling process and can not adapt to the requirements of rock burst, large deformation and other conditions on tunnel expanding excavation.
Disclosure of Invention
The invention aims to provide a shield and tunneling equipment of a tunneling machine, which can adapt to tunneling construction operation of a large-scale variable-section tunnel, and have high safety and low accident rate.
The embodiment of the invention is realized by the following steps:
in a first aspect, the present invention provides a shield for a heading machine, comprising:
the inner support ring is used for being sleeved on a shield machine crossbeam and can be connected with the shield machine crossbeam through a connecting piece; the plurality of outer support modules are positioned on the outer side of the inner support ring and are arranged at intervals in the circumferential direction of the inner support ring; each outer support module comprises a base and a plurality of supports, each base is connected with the inner support ring through a first telescopic module, and the first telescopic module is used for driving the corresponding outer support module to move along the radial direction of the inner support ring so that the base can be supported on the inner wall of the tunnel; a plurality of support pieces all with base sliding fit, and every support piece all passes through the flexible module of second and pedestal connection, the flexible module of second is used for driving the support piece that corresponds along the radial motion of inner support ring to make a plurality of support piece homoenergetic support with the tunnel inner wall and hold.
In an alternative embodiment, the support is provided with an abutment surface for abutment against the tunnel inner wall, the abutment surface being provided as an arc-shaped surface, the profile of the longitudinal cross-section of the abutment surface extending in the circumferential direction of the support ring, wherein the longitudinal cross-section is a plane perpendicular to the axis of the support ring.
In an optional embodiment, the outer support module further comprises a mounting seat, and the mounting seat is connected with the base through a corresponding second telescopic module; the supporting piece is arranged as a roller, the outline of the transverse section of the roller is circular, and the transverse section is a plane vertical to the axis of the roller; the supporting piece is in running fit with the mounting seat through a rotating shaft, and the extending direction of the rotating shaft is tangent to the supporting ring.
In an alternative embodiment, the support member is provided with an anti-slip structure.
In an alternative embodiment, the anti-slip structure is provided as a plurality of anti-slip grooves arranged in a cross manner.
In an alternative embodiment, the base is provided with an inner side surface and an outer side surface which are opposite, the outer side surface is provided with an arc-shaped surface, and the cross-sectional profile of the outer side surface extends along the circumferential direction of the support ring; the outer side face is provided with a plurality of accommodating grooves, a plurality of supporting pieces are matched with the accommodating grooves in a one-to-one correspondence mode, and each supporting piece can retract into the accommodating groove or protrude out of the outer side face under the driving of the corresponding second telescopic module.
In an alternative embodiment, the outer side faces are provided as circular arc faces, the outer side faces of the plurality of bases together being able to form a circumferential face coaxial with the support ring.
In an alternative embodiment, each support is removably connected to a corresponding second telescoping module.
In an alternative embodiment, at least one of the first and second telescopic modules is provided as a jack.
In a second aspect, the present invention provides a heading device comprising:
the heading machine shield of any of the preceding embodiments.
The embodiment of the invention has the beneficial effects that:
in summary, the present embodiment provides a shield for a heading machine, which is used in combination with a cutter head of the heading machine and other structures. In the operation process of the tunneling machine, the shield of the tunneling machine can be correspondingly adjusted along with the change of the section size of the tunnel, so that the shield is tightly attached to the inner wall of the tunnel, meanwhile, the shield provides active supporting force for surrounding rocks, the supporting effect is improved, and the safety is improved. Specifically, along with the change of the size of the cross section of the inner wall of the tunnel, the radius and the curvature of the cross section are changed, the radius is different, the curvature is different, in order to enable the shield to be tightly attached to the inner wall of the tunnel, the size of the cross section of the inner wall of the tunnel is increased as an example, when the shield is used for supporting the inner wall of the tunnel, the first telescopic module is used for driving the corresponding outer supporting module to outwards keep away from the inner supporting ring along the radial direction of the inner supporting ring, namely to be close to the inner wall of the tunnel, the base is contacted with the inner wall of the tunnel firstly, primary supporting protection is realized, the curvature is reduced after the radius is increased, the radius and the curvature of the base cannot be changed, and at the moment, the contact area of the base and the inner wall of the tunnel is limited. Then, the second telescopic module is started to drive the corresponding support piece to move outwards along the radial direction of the inner support ring, the support piece is close to the inner wall of the tunnel, the support piece can further abut against the inner wall of the tunnel, and therefore the part, which is not contacted with the inner wall of the tunnel, of part of the base is filled. And because base and a plurality of support piece homoenergetic adaptability adjustment position for base and a plurality of support piece are joined in marriage jointly and can be suitable to the tunnel inner wall's of different radiuses, different curvatures strutting, and application scope is wide, and it is effectual to strut, and the security is high.
In addition, first flexible module and the flexible module of second all have overload protection function, automatic uninstallation when receiving too big load avoids structural damage. And rolling friction is formed between the supporting piece and the surrounding rock in the tunnel excavation direction, so that the forward resistance of the heading machine is reduced. Sliding friction exists between the supporting piece and the surrounding rock in the circumferential direction of the tunnel, and the heading machine is limited to roll.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a state of a shield of a heading machine according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another state of a shield of the heading machine according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a base according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an outer support module according to an embodiment of the present invention;
FIG. 5 is a schematic view of a hidden portion of a base of an outer support module according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a portion of the enlarged structure of FIG. 5;
FIG. 7 is a schematic structural diagram of a support member according to an embodiment of the present invention;
FIG. 8 is a structural schematic view of a deformed configuration of a support member according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a shield and a shield machine beam in accordance with an embodiment of the present invention.
Icon:
001-shield machine crossbeam; 002-connecting pieces; 100-inner support ring; 200-an outer support module; 210-a base; 211-medial side; 212-outer side; 213-a receiving groove; 220-a support; 221-a butting face; 222-rotating the hole; 223-anti-slip structure; 230-a mounting seat; 231-a base plate; 232-side plate; 240-rotating shaft; 300-a first telescoping module; 400-second telescoping module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention 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 present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the tunneling construction process, the cross-sectional dimension of the inner wall of the tunnel may be changed continuously, so that the dimension of the inner wall supporting structure of the tunnel needs to be adjusted continuously to support the inner wall of the tunnel adaptively. In the prior art, the inner wall of the tunnel is supported by the plurality of arc-shaped plates, and the plurality of arc-shaped plates can be spliced to form a circular ring structure. Each arc-shaped plate can move in the radial direction of the inner wall of the tunnel, so that the support radius is adjusted. Because the radian of every arc is certain, after the adjustment radius, the camber of arc can not change, and when the cross section size of tunnel inner wall constantly changed, the radius of cross section and the equal corresponding change of camber, consequently, prior art's arc can not adjust the camber of camber in order to adapt to the cross section of tunnel inner wall, and the support effect is poor, can not realize that the tunnel inner wall of large-scale variable cross section struts.
Referring to fig. 1 to 9, in view of the above, a designer designs a shield of a heading machine, which is mainly suitable for hard rock supporting, can adjust the radius and curvature of the shield to adapt to the size change of the cross section of the inner wall of the tunnel, and has the advantages of wide application range, good supporting effect and high safety.
Referring to fig. 1 or fig. 2, and with reference to fig. 5, in the present embodiment, the shield of the heading machine includes an inner support ring 100 and a plurality of outer support modules 200, the inner support ring 100 is adapted to be sleeved on a cross beam 001 of the shield machine and can be connected to the cross beam 001 of the shield machine through a connecting piece 002, the plurality of outer support modules 200 are located outside the inner support ring 100 and are arranged at intervals in the circumferential direction of the inner support ring 100; each outer support module 200 comprises a base 210 and a plurality of supports 220, each base 210 is connected with the inner support ring 100 through a first telescopic module 300, and the first telescopic module 300 is used for driving the corresponding outer support module 200 to move along the radial direction of the inner support ring 100, so that the base 210 can be supported against the inner wall of the tunnel; the supporting members 220 are slidably engaged with the base 210, each supporting member 220 is connected to the base 210 through a second telescopic module 400, and the second telescopic module 400 is used for driving the corresponding supporting member 220 to move along the radial direction of the inner supporting ring 100, so that the supporting members 220 can be abutted against the inner wall of the tunnel.
The shield of the heading machine provided by the embodiment is matched with a heading machine cutter head and other structures for use. In the operation process of the tunneling machine, the shield of the tunneling machine can be correspondingly adjusted along with the change of the section size of the tunnel, so that the shield is tightly attached to the inner wall of the tunnel, meanwhile, the shield provides active supporting force for surrounding rocks, the supporting effect is improved, and the safety is improved. Specifically, as the size of the cross section of the inner wall of the tunnel changes, the radius and the curvature of the cross section both change, the radius is different, and the curvature is different, in order to make the shield closely adhere to the inner wall of the tunnel, taking the size of the cross section of the inner wall of the tunnel as an example for illustration, when the shield is used for supporting the inner wall of the tunnel, the first telescopic module 300 is used to drive the corresponding outer supporting module 200 to be away from the inner supporting ring 100 outwards along the radial direction of the inner supporting ring 100, i.e. to be close to the inner wall of the tunnel, the base 210 is contacted with the inner wall of the tunnel before the base 210 is contacted with the inner wall of the tunnel, so as to realize primary supporting protection, the curvature is reduced after the radius is increased, the radius and the curvature of the base 210 itself cannot change, and at this time, the contact area between the base 210 and the inner wall of the tunnel is limited. Then, the second expansion module 400 is started, so that the second expansion module 400 drives the corresponding supporting piece 220 to move outwards along the radial direction of the inner supporting ring 100, the supporting piece 220 is close to the inner wall of the tunnel, and the supporting piece 220 can further abut against the inner wall of the tunnel, so that the part of the base 210 which is not in contact with the inner wall of the tunnel is filled, and therefore, the supporting of the inner wall of the tunnel with the large-scale variable section is realized through the matching of the base 210 and the supporting pieces 220. And because base 210 and a plurality of support piece 220 homoenergetic adjustment position for base 210 and a plurality of support piece 220 join in marriage jointly and can be suitable for the tunnel inner wall's of different radiuses, different curvatures strutting, and application scope is wide, and it is effectual to strut, and the security is high.
In addition, the first and second expansion modules 300 and 400 have an overload protection function, and are automatically unloaded when being subjected to an excessive load, thereby preventing structural damage. The support member 220 and the surrounding rock are in rolling friction in the tunnel excavation direction, so that the forward resistance of the heading machine is reduced. The support member 220 and the surrounding rock are in sliding friction in the circumferential direction of the tunnel, so that the heading machine is limited from rolling.
It should be understood that, when the cross-sectional dimension of the tunnel inner wall is reduced, the plurality of bases 210 and the plurality of supporting members 220 can be retracted first, and the supporting members 220 are retracted into the bases 210, and the bases 210 and the tunnel inner wall are abutted first, and then the supporting members 220 and the tunnel inner wall are abutted, so as to enhance the supporting effect.
In addition, the inner wall of the tunnel may be individually supported only by the base 210 or only by the plurality of supporters 220 depending on the size of the inner wall of the tunnel in cross section.
In this embodiment, optionally, the support ring sets up to the ring structure, and the support ring can adopt the metal to make, also can be the metal ring for the support ring, and structural strength is high, non-deformable damage during the atress is damaged, long service life, and the security is high.
Referring to fig. 1 or fig. 2, in the present embodiment, it should be understood that the number of the plurality of outer support modules 200 disposed outside the support ring is set as required, and in the present embodiment, eight outer support modules 200 are illustrated as an example. The eight outer support modules 200 are uniformly arranged at intervals in the circumferential direction of the inner support ring 100, the base 210 of each outer support module 200 is a circular arc-shaped plate, and the eight bases 210 can be spliced to form an outer circular ring coaxially arranged with the inner support ring 100.
Referring to fig. 3, the base 210 further includes an inner side surface 211 and an outer side surface 212 that are opposite to each other in the radial direction, and both the inner side surface 211 and the outer side surface 212 are arc surfaces. The outer side surface 212 is provided with a plurality of receiving grooves 213, the depth of the plurality of receiving grooves 213 extends along the radial direction of the circle where the base 210 is located, each receiving groove 213 may be a rectangular groove, and the plurality of receiving grooves 213 may be arranged in a rectangular array.
During assembly, the first telescopic module 300 abuts against the inner support ring 100 and the inner side surface 211, and the first telescopic module 300 can drive the base 210 to be close to the inner support ring 100 or far away from the inner support ring 100 along the radial direction of the inner support ring 100, so that the distance between the base 210 and the axis of the inner support ring 100 is adjusted to adapt to the support of the inner walls of tunnels with different radiuses. It should be understood that the first telescopic module 300 may be welded to the inner support ring 100 and the base 210, or the first telescopic module 300 may be fixed to the inner support ring 100 and the base 210 by bolts or the like.
It should be understood that the telescopic direction of the first telescopic module 300 may be parallel to the radial direction of the inner support ring 100, or the telescopic direction of the first telescopic module 300 has an included angle with the radial direction of the inner support ring 100, so as to drive the base 210 to approach or depart from the inner support ring 100, so as to adapt to the support of the inner wall of the tunnel with different radii.
In addition, the same base 210 may be driven by a plurality of first telescopic modules 300 to improve the stability of the base 210.
Referring to fig. 5 and 6, a second expansion module 400 is disposed on the bottom wall of each receiving groove 213. The second expansion module 400 can perform expansion and contraction movement along the groove depth direction of the accommodating grooves 213, a supporting member 220 is further disposed in each accommodating groove 213, each supporting member 220 is connected with the corresponding second expansion module 400, and the second expansion module 400 can drive the corresponding supporting member 220 to slide relative to the base 210 along the groove depth direction of the accommodating groove 213, so that the supporting member 220 can be switched between the end surface (i.e., the outer side surface 212 of the base 210) where the notch protruding out of the accommodating groove 213 is located and the position retracted into the accommodating groove 213.
It should be understood that the second expansion module 400 can have an angle with the groove depth direction, and the support member 220 can be driven to slide in the direction approaching to or departing from the groove bottom wall.
Referring to fig. 6 or fig. 7, in an embodiment, the supporting member 220 is a roller, and the outer peripheral wall of the supporting member 220 is an arc-shaped peripheral wall, in other words, the outer profile of the transverse section of the supporting member 220 is circular, and the outer profile of the longitudinal section of the supporting member 220 is a drum-shaped profile with a large middle and small two ends, that is, the diameter of the outer profile of the transverse section of the supporting member 220 gradually increases from the two ends of the supporting member 220 to the middle, so that the longitudinal section of the arc-shaped peripheral wall is arc-shaped, and the arc-shaped peripheral wall of the supporting member 220 may also be referred to as an abutting surface 221 for abutting against the inner wall of the tunnel, and the arc-shaped peripheral wall can keep tangential to the inner wall of the tunnel when abutting against the tunnel. Furthermore, the longitudinal section outline of the arc-shaped peripheral wall is in a circular arc shape. Wherein, the transverse section is a plane perpendicular to the axis of the supporting member 220, and the longitudinal section is a plane passing through the axis of the roller, wherein, when the supporting member 220 is assembled to the accommodating groove 213, the longitudinal section of the supporting member 220 is also a plane perpendicular to the axis of the inner support ring 100.
Further, the supporting member 220 is provided with a rotation hole 222 penetratingly provided along an axis thereof, and the rotation hole 222 is provided as a circular hole.
Meanwhile, the outer support module 200 further includes a mounting seat 230 for mounting the roller type support 220, the mounting seat 230 includes a bottom plate 231 and two side plates 232, the bottom plate 231 and the two side plates 232 are rectangular plates, each side plate 232 is provided with a connecting hole, and the two connecting holes are coaxially arranged. The mounting seat 230 is disposed in the receiving groove 213, the bottom plate 231 is connected to the second expansion module 400, the two side plates 232 are arranged opposite to each other in the circumferential direction of the base 210, and the supporting member 220 is rotatably connected to the mounting seat 230 through the rotating shaft 240. That is, the rotating shaft 240 is inserted into the rotating hole 222 of the supporting member 220, both ends of the rotating shaft 240 are respectively disposed in the connecting holes, the supporting member 220 is located between the two side plates 232, and the supporting member 220 protrudes out of the side plates 232 along the groove depth direction of the accommodating groove 213. It should be understood that, after the supporting member 220 is disposed in the accommodating groove 213 through the mounting seat 230, the rotating shaft 240 is parallel to a straight line tangent to the circumferential surface of the inner supporting ring 100, the supporting member 220 abuts against the inner wall of the tunnel, and when the heading machine advances, the supporting member 220 is in rolling contact with the inner wall of the tunnel, and the supporting member 220 can roll relative to the inner wall of the tunnel, so that the friction between the supporting member 220 and the inner wall of the tunnel when the heading machine advances is reduced, the resistance applied when the heading machine advances is reduced, the energy consumption is reduced, and the energy saving and. In addition, the supporting member 220 is mounted on the mounting seat 230 through the rotating shaft 240, and the supporting member 220 and the mounting seat 230 are relatively fixed in the circumferential direction of the base 210, so that the supporting member 220 does not roll relative to the inner wall of the tunnel in the circumferential direction of the inner wall of the tunnel, the supporting member 220 and the inner wall of the tunnel are in sliding friction, and the supporting member 220 can provide large resistance, so that the supporting member is prevented from rotating relative to the inner wall of the tunnel in the circumferential direction of the inner wall of the tunnel in the construction process of the heading machine, and the safety is improved.
Referring to fig. 8, in another embodiment, the supporting member 220 is directly connected to the second expansion module 400, the supporting member 220 has an abutting surface 221 departing from the second expansion module 400, the abutting surface 221 is configured as an arc-shaped surface, a longitudinal cross-sectional profile of the abutting surface 221 is an arc line, and further, a longitudinal cross-sectional profile of the abutting surface 221 is an arc line. When the supporting member 220 is disposed in the receiving groove 213, the abutting surface 221 extends along the circumferential direction of the inner supporting ring 100. The abutting surface 221 is provided with an anti-slip structure 223, and the anti-slip structure 223 is provided with a plurality of anti-slip grooves which are arranged in a crossed manner. When the supporting member 220 abuts against the inner wall of the tunnel, the anti-skid structure 223 is directly contacted with the inner wall of the tunnel, so that the friction force between the supporting member 220 and the inner wall of the tunnel is increased, and thus, the position of the shield can provide counter force for the heading machine to advance.
In other words, the structural form of the supporting member 220 can be, but is not limited to, the two structures, and the supporting member 220 and the second telescopic module 400 are detachably connected, so that the supporting member 220 with a proper structure can be selected to be supported on the inner wall of the tunnel according to the needs of the use scene.
In this embodiment, optionally, the first and second telescopic modules 300 and 400 may be provided as a jack. Obviously, the first expansion module 300 and the second expansion module 400 may be configured in other structures capable of realizing the expansion function, and the structures of the two may be configured differently. The first and second expansion modules 300 and 400 have an overload protection function, and can automatically unload the safety of the protection device when receiving an excessive impact force.
The shield of the heading machine provided by the embodiment can adjust the support radius and curvature as required, so that the shield is suitable for supporting the inner wall of a large-size variable-section tunnel, and has the advantages of wide application range, low cost and high safety.
The embodiment also provides tunneling equipment, which comprises the tunneling machine shield mentioned in the embodiment, and when the section size of the inner wall of the tunnel changes along with the advancing of the tunneling equipment, the tunneling machine shield can adapt to the variable section of the tunnel, so that the stable and effective support is improved, and the construction safety is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A shield for a heading machine, comprising:
the shield machine supporting structure comprises an inner supporting ring (100) and a plurality of outer supporting modules (200), wherein the inner supporting ring (100) is used for being sleeved on a shield machine cross beam (001) and can be connected with the shield machine cross beam (001) through a connecting piece (002), and the plurality of outer supporting modules (200) are located on the outer side of the inner supporting ring (100) and are arranged at intervals in the circumferential direction of the inner supporting ring (100); each outer support module (200) comprises a base (210) and a plurality of supports (220), each base (210) is connected with the inner support ring (100) through a first telescopic module (300), and the first telescopic module (300) is used for driving the corresponding outer support module (200) to move along the radial direction of the inner support ring (100) so that the base (210) can be supported against the inner wall of the tunnel; the supporting pieces (220) are in sliding fit with the base (210), each supporting piece (220) is connected with the base (210) through a second telescopic module (400), and the second telescopic modules (400) are used for driving the corresponding supporting pieces (220) to move along the radial direction of the inner supporting ring (100), so that the supporting pieces (220) can be abutted against the inner wall of the tunnel.
2. The heading machine shield of claim 1, wherein:
the supporting piece (220) is provided with an abutting surface (221) used for abutting against the inner wall of the tunnel, the abutting surface (221) is arranged to be an arc-shaped surface, the profile of the longitudinal section of the abutting surface (221) extends along the circumferential direction of the supporting ring, and the longitudinal section is a plane perpendicular to the axis of the supporting ring.
3. The heading machine shield of claim 2, wherein:
the outer support module (200) further comprises a mounting seat (230), and the mounting seat (230) is connected with the base (210) through the corresponding second telescopic module (400); the support (220) is provided as a roller, the contour of the transverse section of the roller is circular, and the transverse section is a plane perpendicular to the axis of the roller; the supporting piece (220) is in rotating fit with the mounting seat (230) through a rotating shaft, and the extending direction of the rotating shaft is tangent to the supporting ring.
4. The heading machine shield of claim 1, wherein:
the support piece (220) is provided with an anti-slip structure (223).
5. The heading machine shield of claim 4, wherein:
the anti-skid structures (223) are arranged into a plurality of anti-skid grooves which are arranged in a crossed mode.
6. The heading machine shield of claim 1, wherein:
the base (210) is provided with an inner side surface (211) and an outer side surface (212) which are opposite to each other, the outer side surface (212) is provided as an arc-shaped surface, and the cross-sectional profile of the outer side surface (212) extends along the circumferential direction of the support ring; the outer side face (212) is provided with a plurality of accommodating grooves (213), the supporting pieces (220) are matched with the accommodating grooves (213) in a one-to-one correspondence mode, and each supporting piece (220) can retract into the accommodating groove or protrude out of the outer side face (212) under the driving of the corresponding second telescopic module (400).
7. The heading machine shield of claim 6, wherein:
the outer side surfaces (212) are arc surfaces, and the outer side surfaces (212) of the bases (210) can jointly form a circumferential surface coaxial with the support ring.
8. The heading machine shield of claim 1, wherein:
each support (220) is detachably connected with the corresponding second telescopic module (400).
9. The heading machine shield of claim 1, wherein:
at least one of the first telescoping module (300) and the second telescoping module (400) is provided as a jack.
10. A ripping apparatus, characterized in that the ripping apparatus includes:
a heading machine shield as claimed in any one of claims 1 to 9.
CN202110794370.7A 2021-07-14 2021-07-14 Shield of heading machine and heading equipment Active CN113338958B (en)

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