阅读说明：本技术 盾构密封装置及盾构密封方法 (Shield sealing device and shield sealing method ) 是由 陈健 李树忱 支斌 王承震 历朋林 刘红军 于 2020-03-30 设计创作，主要内容包括：本发明提供了一种盾构密封装置及盾构密封方法,盾构接收洞口处设置有围护桩,盾构密封装置安装于围护桩上,盾构密封装置包括：弹性内圈,弹性内圈的内壁与盾构机的刀盘外壁相适配；多个控制部,多个控制部安装在围护桩上；多个控制部沿弹性内圈的周向间隔设置,控制部的驱动端压靠在弹性内圈的外侧,以挤压或释放弹性内圈。当盾构机行进的过程中,盾构机经过洞口时的内径逐渐减小,通过控制部对弹性内圈进行挤压,从而使得弹性内圈贴靠在盾构机的侧壁上,达到良好的密封洞口的效果,避免了漏水、漏浆问题,无需人工插板,安全系数高,操作方便。(The invention provides a shield sealing device and a shield sealing method, wherein a fender post is arranged at a shield receiving hole, the shield sealing device is arranged on the fender post, and the shield sealing device comprises: the inner wall of the elastic inner ring is matched with the outer wall of a cutter head of the shield tunneling machine; the control parts are mounted on the guard piles; the plurality of control parts are arranged at intervals along the circumferential direction of the elastic inner ring, and the driving ends of the control parts are pressed against the outer side of the elastic inner ring to press or release the elastic inner ring. When the shield constructs the in-process that the machine marchd, the internal diameter when the shield constructs the machine through the entrance to a cave reduces gradually, extrudees the elasticity inner circle through the control division to make the elasticity inner circle paste and lean on the lateral wall of shield structure machine, reach the effect of good sealed entrance to a cave, avoided leaking, leak thick liquid problem, need not artifical picture peg, factor of safety is high, convenient operation.)

1. The utility model provides a shield constructs sealing device, its characterized in that, shield constructs and receives that cave mouth department is provided with fender pile (10), shield constructs sealing device install in on fender pile (10), shield constructs sealing device includes:

the inner wall of the elastic inner ring (30) is matched with the outer wall of a cutter head (50) of the shield tunneling machine;

a plurality of control portions (20), a plurality of the control portions (20) being mounted on the fender post (10);

the control parts (20) are arranged at intervals along the circumferential direction of the elastic inner ring (30), and the driving ends of the control parts (20) are pressed against the outer side of the elastic inner ring (30) to press or release the elastic inner ring (30).

2. The shield sealing device according to claim 1, wherein the number of the control portions (20) is six, and the six control portions (20) are arranged at equal intervals in a circumferential direction of the elastic inner ring (30).

3. The shield sealing device according to claim 1, characterized in that the control portion (20) comprises a drive device and a push plate (40) mounted at an output end of the drive device, the push plate (40) abutting against an outer portion of the elastic inner ring (30).

4. The shield sealing arrangement according to claim 3, characterized in that the inner wall of the push plate (40) is provided with a recess extending in the length direction of the push plate (40), which recess is adapted to the outer wall of the elastic inner ring (30).

5. The shield sealing device according to claim 1, wherein a reserved gap is formed between two adjacent control parts (20), a protrusion is arranged on the elastic inner ring (30), the protrusion is matched with the reserved gap, and the protrusion is installed in the reserved gap.

6. A shield sealing arrangement according to claim 1, characterized in that the elastic inner ring (30) is made of rubber, the elastic inner ring (30) being internally inflated.

7. A shield seal arrangement according to claim 3, wherein the drive arrangement comprises a hydraulic power arrangement.

8. The shield sealing device according to claim 1, further comprising a detection device mounted on the elastic inner ring (30) for detecting a distance between a sidewall of the shield machine and the elastic inner ring (30).

9. A shield seal method, characterized in that the shield seal method employs a shield seal device according to any one of claims 1 to 8, the method comprising:

when the cutter head (50) is positioned in the elastic inner ring (30), the control part (20) is in an initial position;

when a front shield (60) of the shield machine is positioned in the elastic inner ring (30), the control part (20) extrudes the elastic inner ring (30) to a first state;

when a middle shield (70) of the shield machine is positioned in the elastic inner ring (30), the control part (20) extrudes the elastic inner ring (30) to a second state;

when a rear shield (80) of the shield machine is positioned in the elastic inner ring (30), the control part (20) extrudes the elastic inner ring (30) to a third state.

10. The shield sealing method according to claim 9, characterized in that in the first state, the elastic inner ring (30) pressed by the control portion (20) abuts against a sidewall of the shield machine shield (60);

in the second state, the elastic inner ring (30) extruded by the control part (20) is abutted on the side wall of a shield (70) in the shield machine;

in the third state, the elastic inner ring (30) pressed by the control part (20) abuts against the side wall of the rear shield (80) of the shield machine.

Technical Field

The invention relates to the technical field of shield equipment, in particular to a shield sealing device and a shield sealing method.

Background

In recent years, the development of tunnels gradually introduces shield construction, which is a novel underground excavation construction method and becomes an important component of the traffic development of various big cities at home and abroad. The method has the advantages of large transportation capacity, high speed, low noise, light pollution and the like, has good ecological environment, economic and social benefits, and is more and more favored by people.

The shield construction is mainly divided into three stages, namely starting, normal tunneling and receiving. The shield machine receiving refers to the process from tunnel construction in tunneling to a shield construction working well by the shield machine, and the cutter head cuts the plugging wall to enter the working well, namely the shield receiving work starts. The receiving opening is required to be provided with the portal curtain cloth and the pressing plate, so that the function of plugging a portal leakage channel is achieved. The diameter of the cutter head is larger than that of other parts of the shield machine, the diameter of the notch of the cutter head in shield construction is larger than that of the shield, and the shield receives forward again, so that a water leakage and slurry leakage channel is still formed. The problem that the shield machine is blocked to delay the construction period and receive major disasters such as cave-in of a cave entrance, surface subsidence and the like is easily caused.

Patent 201820986172.4, a sealing rubber curtain for shield receiving construction. The utility model discloses a shield constructs and receives construction with sealed curtain cloth, including steel ring board A board, steel ring board B board, hinge clamp plate, rings, wire rope and curtain cloth rubber slab. When the shield shell of the shield front body is pushed out of the tunnel portal, the flap pressing plate is adjusted through the steel wire rope on the pressing plate clamping ring to press the cord fabric rubber plate as much as possible so as to prevent soil and slurry of the tunnel portal from leaking out, and the steel wire rope is tensioned again when the duct piece is pulled out of the shield tail so that the pressing plate can press the rubber cord fabric, the cord fabric can play a sealing role all the time, and the sealing effect is good. This patent the change of shield structure machine size itself is not considered to the device, the diameter difference at different positions, and the contact nature that goes to change sealed curtain cloth and shield structure machine that belongs to the artifical mechanical type moreover, can't guarantee the shield structure machine and receive the leakproofness of whole process, and the efficiency of construction is low moreover, and is consuming time long, in addition, goes out the hole along with the blade disc, because the blade disc diameter of shield structure machine itself is greater than other parts of shield structure machine, consequently leaks owing to the not good two emergence that lead to of leakproofness, the thick liquid phenomenon of leaking very easily in the switching department.

In order to solve the problem, at present, a circle of curtain cloth and a pressing plate are generally arranged around a receiving opening of a shield machine to serve as a sealing device, but the diameter of a cutter head of the shield machine is larger than that of other parts of the shield machine, the method only can play a role in sealing to a certain extent, the whole diameter tends to be smaller and smaller as the shield machine gradually goes out of a hole, the sealing effect is poorer and poorer, and therefore manual gradual inserting plates are needed.

Disclosure of Invention

The invention mainly aims to provide a shield sealing device and a shield sealing method, and aims to solve the problem that the sealing performance of a shield tunneling machine in the prior art is poor in the process of going out of a tunnel.

In order to achieve the above object, according to one aspect of the present invention, there is provided a shield sealing apparatus, in which a fender post is provided at a shield receiving opening, the shield sealing apparatus is installed on the fender post, and the shield sealing apparatus includes: the inner wall of the elastic inner ring is matched with the outer wall of a cutter head of the shield tunneling machine; the control parts are mounted on the guard piles; the plurality of control parts are arranged at intervals along the circumferential direction of the elastic inner ring, and the driving ends of the control parts are pressed against the outer side of the elastic inner ring to press or release the elastic inner ring.

Furthermore, the number of the control parts is six, and the six control parts are arranged at equal intervals along the circumferential direction of the elastic inner ring.

Further, the control part comprises a driving device and a push plate arranged at the output end of the driving device, and the push plate is abutted against the outer part of the elastic inner ring.

Furthermore, the inner wall of the push plate is provided with a concave part, the concave part extends along the length direction of the push plate, and the concave part is matched with the outer wall of the elastic inner ring.

Furthermore, a reserved gap is formed between every two adjacent control parts, a protrusion is arranged on the elastic inner ring and matched with the reserved gap, and the protrusion is installed in the reserved gap.

Further, the elastic inner ring is made of rubber, and the elastic inner ring is internally inflated.

Further, the drive means comprises hydraulic power means.

Furthermore, the shield sealing device also comprises a detection device, and the detection device is arranged on the elastic inner ring and is used for detecting the distance between the side wall of the shield machine and the elastic inner ring.

According to another aspect of the present invention, there is provided a shield sealing method using the above shield sealing apparatus, the method including: when the cutter head is positioned in the elastic inner ring, the control part is in an initial position; when a front shield of the shield machine is positioned in the elastic inner ring, the control part extrudes the elastic inner ring to a first state; when a middle shield of the shield machine is positioned in the elastic inner ring, the control part extrudes the elastic inner ring to a second state; when a rear shield of the shield machine is positioned in the elastic inner ring, the control part extrudes the elastic inner ring to a third state.

Further, in the first state, the elastic inner ring extruded by the control part is abutted against the side wall of the front shield of the shield machine; in the second state, the elastic inner ring extruded by the control part is abutted against the side wall of a shield in the shield machine; in the third state, the elastic inner ring extruded by the control part is abutted against the side wall of the rear shield of the shield machine.

By applying the technical scheme of the invention, when the shield machine advances, the inner diameter of the shield machine is gradually reduced when the shield machine passes through the opening, and the elastic inner ring is extruded by the control part, so that the elastic inner ring is attached to the side wall of the shield machine, a good effect of sealing the opening is achieved, the problems of water leakage and slurry leakage are avoided, manual inserting plates are not needed, the safety coefficient is high, and the operation is convenient.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 schematically illustrates a radial cross-sectional view of an embodiment of a shield seal arrangement of the present invention; and

FIG. 2 is a schematic block diagram illustrating the control section area of the shield seal apparatus of the present invention;

fig. 3 is a schematic diagram showing the structure of an embodiment of the shield sealing device of the present invention installed at a cave entrance.

Wherein the figures include the following reference numerals:

10. a fender pile; 20. a control unit; 30. an elastic inner ring; 40. pushing the plate; 50. a cutter head; 60. anterior shield; 70. middle shield; 80. the posterior shield.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As described in the background art, at present, a circle of curtain cloth and a pressing plate are generally arranged around a receiving opening of a shield machine to serve as a sealing device, but because the diameter of a cutter head of the shield machine is larger than that of other parts of the shield machine, the method can only play a role in sealing to a certain extent, and the whole diameter tends to be smaller and smaller as the shield machine gradually goes out of a hole, the sealing effect is poorer and poorer, so that manual gradual inserting plates are needed, but the method is long in time consumption and high in risk, influences the construction efficiency of a tunnel, and even causes serious disasters such as hole collapse, surface subsidence and the like.

When the shield machine goes out of the hole, the cutter head firstly breaks the hole and then goes out, and the diameter of the cutter head of the shield machine is larger than that of other parts of the shield machine. Therefore, in the process of the shield tunneling machine going out of the hole, the sealing performance of the receiving hole is increasingly poor. As shown in fig. 3, the diameter of the cutter head > the diameter of the front shield > the diameter of the middle shield > the diameter of the tail shield, so that if the sealing part is fixed, the problems of water leakage and slurry leakage are inevitably caused at the rear part. The traditional method adopts a manual board inserting method, which is long in time consumption and high in risk.

In order to solve the above problems, referring to fig. 1 to 3, an embodiment of the present invention provides a shield sealing device, a fender post 10 is disposed at a shield receiving hole, the shield sealing device is mounted on the fender post 10, the shield sealing device includes an elastic inner ring 30 and a plurality of control portions 20, wherein an inner wall of the elastic inner ring 30 is adapted to an outer wall of a cutter 50 of a shield machine; a plurality of control parts 20 are installed on the fender post 10; a plurality of control portions 20 are provided at intervals in the circumferential direction of the elastic inner ring 30, and the driving end of the control portion 20 is pressed against the outer side of the elastic inner ring 30 to press or release the elastic inner ring 30. When the shield constructs the in-process that the machine marchd, the internal diameter when the shield constructs the machine through the entrance to a cave reduces gradually, extrudees the elasticity inner circle through the control division to make the elasticity inner circle paste and lean on the lateral wall of shield structure machine, reach the effect of good sealed entrance to a cave, avoided leaking, leak thick liquid problem, need not artifical picture peg, factor of safety is high, convenient operation.

Preferably, the number of the control portions 20 in the present embodiment is six, and the six control portions 20 are arranged at equal intervals in the circumferential direction of the elastic inner ring 30. Of course, in other embodiments, the number of the control portions may be other, and a good sealing effect may be achieved. The whole device is divided into six large areas, and when pressure is applied, deformation of the whole elastic inner ring is facilitated, so that the diameter change of the shield tunneling machine in the hole outlet process is adapted, and the sealing performance of the whole hole outlet process is guaranteed.

In order to apply a more uniform force to the elastic inner ring and prevent the elastic inner ring from being damaged, the control portion 20 in this embodiment includes a driving device and a push plate 40 installed at an output end of the driving device, and the push plate 40 abuts against an outer portion of the elastic inner ring 30. The stress area of the elastic inner ring is increased through the push plate, and the elastic inner ring is prevented from being damaged.

Preferably, the inner wall of the push plate 40 in this embodiment is provided with a recess, and the recess is matched with the outer wall of the elastic inner ring 30. The concave part extends along the length direction of the push plate 40, namely the extending direction of the concave part is the same as that of the push plate, the stress area between the elastic inner ring and the push plate can be further increased through the concave part, and meanwhile, the concave part can also play a role in limiting the elastic inner ring, so that the elastic inner ring is prevented from being extruded or being released to deviate in the process. The concave part is internally provided with a plurality of convex parts so as to increase the friction force between the elastic inner ring and the push plate and prevent the elastic inner ring from moving.

In order to avoid mutual interference between adjacent control parts in the extrusion motion process, a reserved gap is formed between the two adjacent control parts 20, a protrusion is arranged on the elastic inner ring 30 and is matched with the reserved gap, the protrusion is arranged in the reserved gap, and the protrusion is matched with the reserved gap through the protrusion, so that a certain limiting effect can be achieved, the elastic inner ring is further prevented from deviating, and the sealing performance when the whole caliber is reduced is guaranteed.

Preferably, in order to secure the elasticity of the elastic inner ring, the elastic inner ring 30 in the present embodiment is made of rubber, and the inside of the elastic inner ring 30 is inflated.

The driving device in this embodiment includes a hydraulic power device, which includes a hydraulic pump telescopic cylinder, but the driving device may also be implemented by other power devices, such as a pneumatic device.

The shield sealing device in this embodiment further includes a detection device, the detection device is installed on the elastic inner ring 30 and used for detecting the distance between the side wall of the shield machine and the elastic inner ring 30, and the detection device may be an infrared distance sensor or other distance sensors.

According to another aspect of the present invention, there is provided a shield sealing method using the above shield sealing apparatus, the method including: when the cutter disc 50 is positioned in the elastic inner ring 30, the control part 20 is in an initial position; when the front shield 60 of the shield tunneling machine is positioned in the elastic inner ring 30, the control part 20 presses the elastic inner ring 30 to a first state; when the middle shield 70 of the shield machine is positioned in the elastic inner ring 30, the control part 20 presses the elastic inner ring 30 to a second state; when the rear shield 80 of the shield tunneling machine is positioned in the elastic inner ring 30, the control portion 20 presses the elastic inner ring 30 to the third state. The detection device is used for judging which part of the shield machine passes through the elastic inner ring.

In the first state, the elastic inner ring 30 pressed by the control part 20 abuts against the side wall of the shield machine anterior shield 60; in the second state, the elastic inner ring 30 pressed by the control part 20 abuts against the side wall of the shield 70 in the shield machine; in the third state, the elastic inner ring 30 pressed by the control part 20 abuts against the side wall of the rear shield 80 of the shield machine.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

when the shield constructs the in-process that the machine marchd, the internal diameter when the shield constructs the machine through the entrance to a cave reduces gradually, extrudees the elasticity inner circle through the control division to make the elasticity inner circle paste and lean on the lateral wall of shield structure machine, reach the effect of good sealed entrance to a cave, avoided leaking, leak thick liquid problem, need not artifical picture peg, factor of safety is high, convenient operation. The whole sealing device belongs to an automatic device, the sealing performance of the tunnel outlet process of the shield tunneling machine is guaranteed without manual work of gradually inserting plates and the like, and the device is safe, reliable and high in efficiency. The sealing cord fabric in the sealing device is made of two materials, namely steel sheets and rubber. The strength of the whole shield receiving hole is guaranteed, and the deformability of the whole sealing device is also guaranteed.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.

The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatuses, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

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.