CN219034723U - Sectional type sleeve device for shield launching - Google Patents

Abstract

The utility model belongs to the technical field of shield launching systems, and discloses a segmented sleeve device for shield launching, which comprises the following components: the first ring body is used for being coaxially connected with the embedded steel ring of the tunnel portal; the second ring body is detachably connected to the outer side of the shield tail of the shield so as to axially move along with the shield, and is provided with an installation channel for a tunnel segment to pass through and a first connecting part for connecting with the first ring body; the elastic sealing parts are axially arranged on the inner walls of the first ring body and the second ring body, and each group of elastic sealing parts are circumferentially distributed; the shield support frame is used for supporting the shield and can be used for the shield to move on the support frame; and the reaction frame is used for providing support for the tunnel duct piece so that the tunnel duct piece supported by the reaction frame forms a duct piece supporting structure for the shield to advance. The utility model greatly reduces the length of the steel sleeve and is also beneficial to ensuring the roundness precision of each part of the steel sleeve during installation.

Description

Sectional type sleeve device for shield launching

Technical Field

The utility model belongs to the technical field of shield launching systems, and particularly relates to a segmented sleeve device for shield launching.

Background

Along with the mass popularization of urban rail transit in China, the shield technology is more mature and reliable, the construction concept of a shield in the shield industry is formed, the steel sleeve receiving technology matched with the shield is also developed differently, and the technology is gradually popularized. Compared with the traditional stratum reinforcement method, the method has the advantages that the method has higher reliability, convenience and economy, so that the method can be more and more popularized and used, but when the diameter of the steel sleeve reaches a certain diameter, for example, when the diameter exceeds 15 meters, the method is used for shield launching and receiving, and the traditional stratum reinforcement method is used for shield launching, because the deformation of the steel sleeve is larger in the use process after the diameter exceeds 15 meters, and the precision requirement in launching is difficult to meet.

Disclosure of Invention

In view of the above, the present utility model aims to provide a segmented sleeve device for shield initiation, so as to solve the problem that the existing shield initiation needs a longer steel sleeve.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a segmented sleeve apparatus for shield initiation, comprising:

the first ring body is used for being coaxially connected with the embedded steel ring of the tunnel portal;

the second ring body is detachably connected to the outer side of the shield tail of the shield so as to axially move along with the shield, and is provided with an installation channel for a tunnel segment to pass through and a first connecting part for connecting with the first ring body;

the elastic sealing parts are axially arranged on the inner walls of the first ring body and the second ring body, and each group of elastic sealing parts are circumferentially distributed;

the shield support frame is used for supporting the shield and can be used for the shield to move on the support frame; and

and the reaction frame is used for providing support for the tunnel duct piece so that the tunnel duct piece supported by the reaction frame forms a duct piece supporting structure for the shield to advance.

In a possible implementation manner, the elastic sealing component of the first ring body is used for sealing between the first ring body and the outer wall of the shield, and the elastic sealing component of the second ring body is used for sealing between the second ring body and the tunnel segment;

the elastic sealing part of the first ring body is provided with a first sealing diameter, the elastic sealing part of the second ring body is provided with a second sealing diameter, and the first sealing diameter is larger than the second sealing diameter so as to form a stepped sealing structure in the axial direction through the elastic sealing part of the first ring body and the elastic sealing part of the second ring body.

In a possible implementation, the second ring body has an installed state, an originating state, and a sealed state;

in the installation state, the second ring body is relatively fixed with the shield; in the starting state, the second ring body and the shield are relatively fixed and move together with the shield; and in a sealing state, the second ring body is disconnected with the shield, and is connected with the first ring body through the first connecting part.

In a possible implementation, the elastic sealing member is a spring steel scrubber.

In a possible implementation manner, the inner diameter of the first ring body is larger than the inner diameter of the second ring body, and the inner diameter of the second ring body is larger than or equal to the outer diameter of the shield;

at least two groups of elastic sealing parts are arranged on the first ring body and the second ring body, and sealing sections are formed between two adjacent groups of elastic sealing parts; each sealing section on the first ring body can be enclosed with the outer wall of the shield to form a first sealing cavity, and each sealing section on the second ring body can be enclosed with the shield segment to form a second sealing cavity; each first sealing cavity is provided with a first sealing medium injection hole which is communicated with each other, and each second sealing cavity is provided with a second sealing medium injection hole which is communicated with each other.

In a possible implementation manner, a spring steel plate assembly is arranged at the front end of the inner side wall of the first ring body along the circumferential direction, the spring steel plate assembly is provided with an elastic sealing part which extends towards the direction where the embedded steel ring is located, and the elastic sealing part is used for being pressed against the inner wall of the embedded steel ring.

The spring steel plate assembly comprises at least two layers of spring steel plates which are distributed in a radial direction and staggered.

In a possible implementation manner, both ends of the first ring body are provided with first flange connection parts, the first connection parts are second flange connection parts, and the first flange connection parts are detachably connected with the embedded steel ring and the second flange connection parts respectively through the first flange connection parts at both ends;

and a plurality of third sealing medium injection holes are formed in the first flange connection part of the first ring body, which is close to one end of the embedded steel ring, along the circumferential direction.

In a possible implementation manner, the outer wall of the first ring body is provided with at least two groups of linear driving components along the circumferential direction and can be connected with the first connecting part of the second ring body through the linear driving components;

the elastic sealing component of the first ring body is provided with a first maximum sealing diameter and a first minimum sealing diameter, and the outer diameter of the second ring body is smaller than the first maximum sealing diameter and larger than the first minimum sealing diameter, so that the second ring body can move to the inner side of the first ring body along with the shield.

In a possible implementation manner, the first connection portion includes a first connection leg disposed at an outer side of the second ring body, the outer periphery of the first ring body corresponds to a first connection leg of the linear driving component, one end of the linear driving component is mounted on the first connection leg for connection, and the other end of the linear driving component is used for connection with the first connection leg.

In a possible implementation manner, the segmented sleeve device for shield initiation further comprises a third ring body, and the first ring body is connected with the embedded steel ring through the third ring body;

the inner diameter of the third ring body is larger than that of the first ring body, so that a debugging area for debugging the cutterhead is formed at the inner side of the third ring body.

Compared with the prior art, the utility model has the following beneficial effects:

according to the segmented sleeve device for shield launching, the steel sleeve for launching is divided into the first ring body and the second ring body, and the first ring body and the second ring body are respectively arranged at different positions, so that the deformation of the steel sleeve can be reduced; under the sealing action of the elastic sealing parts at the inner sides of the two ring bodies and the cooperation of the shield support frame and the counter-force frame, the shield can be started without being started in a longer steel sleeve, the shield can move only by pushing the tunnel segment on the shield support frame, and then the shield can be started through the sealing structure formed by connecting the two ring bodies, so that the length of the steel sleeve is greatly reduced; meanwhile, the pre-buried portal steel ring, the shield tail of the shield machine and the counter-force frame are taken as reference objects for installation, and the pre-buried portal steel ring, the shield tail of the shield machine and the counter-force frame can be temporarily welded to achieve the functions of fixing and supporting, so that the roundness precision of each part of the steel sleeve during installation can be guaranteed.

Moreover, the first ring body can play a role of a transition ring, and the length of the first ring body is relatively short, so that the deformation of the transition ring is reduced, a spring steel plate brush is not arranged on the inner wall of the transition ring of the traditional steel sleeve for sealing, the spring steel plate brush is arranged on the inner wall of the first ring body and fixed with the inner wall of the transition ring by bolts, and after the transition ring is abandoned after the transition ring is started, the spring steel plate sealing brush in the transition ring can be conveniently taken out and reused, so that the cost can be remarkably reduced.

Meanwhile, the second ring body can move forwards along with the advance of the shield, when the second ring body is close to the first ring body, the second ring body is disconnected with the shield, the second ring body is connected with the first ring body, and at the moment, the combination body formed by the second ring body, the tunnel segment and the first ring body can effectively block mud water outside a station from entering a station channel, so that safety guarantee is provided for the starting of the shield.

In addition, traditional steel sleeve diameter is all than the shield structure is a lot greater, the spring steel plate brush length that needs like this can be longer, and the elastic pressure of spring steel plate brush's terminal can weaken along with spring steel plate's length, reduce the diameter of second ring body to behind the same size with shield structure diameter, will obviously reduce spring steel plate brush's length, can strengthen spring steel plate brush's elastic pressure like this, just also can strengthen spring steel plate seal brush's sealing capability, and spring steel plate seal brush diameter on the first ring body can be greater than the diameter of the spring steel plate brush in the second ring body, the inside two main sealing system that makes up of steel sleeve like this, can effectively block the muddy water outside the station from the passageway of the clearance entering station between pre-buried steel ring and the tunnel segment.

Drawings

Fig. 1 is a schematic structural diagram of a first ring body and a second ring body when the first ring body and the second ring body are connected in an embodiment of the present application;

FIG. 2 is a schematic diagram of an embodiment of the present application when installation work is ready to be completed;

FIG. 3 is a schematic structural diagram of an embodiment of the present application when a shield is initiated;

FIG. 4 is a schematic structural diagram of the first ring body and the second ring body connected after the shield is started according to the embodiment of the present application;

FIG. 5 is a schematic structural view of the third ring body according to the embodiment of the present application;

FIG. 6 is a schematic view of the structure of FIG. 5 when installed;

FIG. 7 is a schematic view of the structure of FIG. 5, shown after installation, as it would have been initiated;

FIG. 8 is a schematic view of the structure of FIG. 5 when the first ring is connected to the second ring after the shield is initiated;

FIG. 9 is a schematic view of the structure of FIG. 5 with the second ring extending inside the first ring;

FIG. 10 is a schematic view of the structure of FIG. 5 with a seal segment provided on the first ring body.

In the figure: 1-a first ring body; 11-a first flange connection; 12-a first sealing medium injection hole; 13-third sealing the medium injection hole; 14-a sealing section; 2-a second ring body; 21-a first connection; 22-a second sealing medium injection hole; 23-mounting channels; 3-track; 4-spring steel plate brushes; 5-spring steel plate assembly; 6-embedding a steel ring; 7-shield; 71-pushing an oil cylinder; 8-a duct piece supporting structure; 81-tunnel segments; 9-shield support frames; 10-a reaction frame; 100-a third ring; 110-a debug area; 200-linear drive components; 210-a first connection leg; 220-first connection leg.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present 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.

The utility model is further described with reference to the drawings and specific examples.

Referring to fig. 1-9, embodiments of the present application provide a segmented sleeve device for shield initiation, comprising: the first ring body 1 is used for being coaxially connected with an embedded steel ring 6 of the portal; the second ring body 2 is detachably connected to the outer side of the shield tail of the shield 7 so as to axially move along with the shield 7, and is provided with an installation channel 23 for the passage of a tunnel duct piece 81 and a first connecting part 21 for connecting with the first ring body 1; the elastic sealing parts are axially arranged on the inner walls of the first ring body 1 and the second ring body 2, and each group of elastic sealing parts are circumferentially distributed; the shield support frame 9 is used for supporting the shield 7 and can be used for the shield 7 to move on the support frame; and the reaction frame 10 is used for providing support for the tunnel duct piece 81, so that the tunnel duct piece 81 supported by the reaction frame 10 forms a duct piece support structure 8 for pushing the shield 7.

Through the technical scheme, the steel sleeve used for starting is divided into the first ring body 1 and the second ring body 2, and the first ring body and the second ring body are respectively arranged at different positions, so that the deformation of the steel sleeve can be reduced; under the sealing action of the elastic sealing components at the inner sides of the two ring bodies and the cooperation of the shield support frame 9 and the counter-force frame 10, the shield 7 can be started without being started in a longer steel sleeve, the shield 7 can move only by pushing the tunnel duct piece 81 on the shield support frame 9, and then the shield 7 can be started through the sealing structure formed by connecting the two ring bodies, so that the length of the steel sleeve is greatly reduced; meanwhile, the pre-buried portal steel ring, the shield tail of the shield 7 machine and the counter-force frame 10 are taken as reference objects for installation, and the pre-buried portal steel ring, the shield tail and the counter-force frame can be temporarily welded to achieve the functions of fixing and supporting, so that the roundness precision of each part of the steel sleeve during installation can be guaranteed.

In an embodiment, the elastic sealing component of the first ring body 1 is used for sealing between the first ring body 1 and the outer wall of the shield 7, and the elastic sealing component of the second ring body 2 is used for sealing between the second ring body 2 and the tunnel segment 81; the elastic sealing part of the first ring body 1 has a first sealing diameter, and the elastic sealing part of the second ring body 2 has a second sealing diameter, wherein the first sealing diameter is larger than the second sealing diameter, so that a stepped sealing structure is formed in the axial direction through the elastic sealing part of the first ring body 1 and the elastic sealing part of the second ring body 2.

The first sealing diameter and the second sealing diameter may be diameters of specifications or determined diameters of the elastic sealing member, or diameters of the elastic sealing member and the first ring body 1 and the second ring body 2, which are matched with each other, and the diameter is not limited. It is worth noting that the first sealing diameter and the second sealing diameter have a maximum and a minimum due to the elasticity of the elastic seal, and in this embodiment the first sealing diameter is preferably larger than the second sealing diameter, either maximum or minimum.

Therefore, the diameter of the elastic sealing part on the first ring body 1 is larger than that of the elastic sealing part in the second ring body 2, so that two stepped main sealing systems can be formed in the high-pass assembly, the sealing system of the first ring body 1 is responsible for solving the problem that the slurry outside the station enters the channel of the station from the gap between the embedded steel ring 6 and the shield shell in the initial tunneling initial stage of the shield 7, and the sealing system of the second ring body 2 and the embedded steel ring 6 are connected to form a combined body, so that the slurry outside the station can be prevented from entering the channel of the station from the gap between the embedded steel ring 6 and the segment.

Specifically, the elastic sealing component is a spring steel plate brush 4. The spring steel plate brush 4 has an excellent elastic sealing effect.

In an embodiment of the present application, the second ring body 2 has an installed state, an originating state, and a sealed state; in the installation state, the second ring body 2 and the shield 7 are relatively fixed; in the starting state, the second ring body 2 and the shield 7 are relatively fixed and move together with the shield 7; in the sealed state, the second ring 2 is disconnected from the shield 7 and connected to the first ring 1 via the first connecting portion 21.

The second ferrule 2 has a plurality of states, i.e., an installation state, an originating state, and a sealing state, during construction. In the installation state, the second ring body 2 needs to be connected with the outer side of the shield tail of the installed shield 7 so as to move together with the shield 7, and the second ring body 2 can be temporarily connected with the reaction frame 10 again, so that the second ring body is more stable in the installation; in the starting state, the second ring body 2 moves along with the shield 7 in the axial direction and starts, and is also convenient to connect with the first ring body 1, so that other driving devices can be avoided; in the sealed state, the second ring body 2 is connected to the first ring body 1 through the first connecting portion 21, forming a sealed structure.

In the embodiment of the application, the inner diameter of the first ring body 1 is larger than the inner diameter of the second ring body 2, and the inner diameter of the second ring body 2 is larger than or equal to the outer diameter of the shield 7; at least two groups of elastic sealing parts are arranged on the first ring body 1 and the second ring body 2, and sealing sections are formed between two adjacent groups of elastic sealing parts; each sealing section on the first ring body 1 can be enclosed with the outer wall of the shield 7 to form a first sealing cavity, and each sealing section on the second ring body 2 can be enclosed with the shield 7 segment to form a second sealing cavity; each of the first sealed cavities is provided with a first sealed medium injection hole 12 which is communicated with each other, and each of the second sealed cavities is provided with a second sealed medium injection hole 22 which is communicated with each other.

The diameter of the traditional steel sleeve is much larger than that of the shield 7, so that the length of the needed elastic sealing component, namely the spring steel plate brush 4, is longer, the elastic pressure at the tail end of the spring steel plate brush 4 is weakened along with the length of the spring steel plate, the length of the spring steel plate brush 4 is obviously reduced after the diameter of the second ring body 2 is reduced to be the same as that of the shield 7, and the elastic pressure of the spring steel plate brush 4 is enhanced, so that the sealing capability of the spring steel plate sealing brush can be enhanced. Moreover, through setting up multiunit elastic sealing member, can make the inboard of first ring body 1 and second ring body 2 form the seal section, and the seal section can enclose with shield 7 outer wall or tunnel segment 81 and form first seal chamber and second seal chamber again, can pour into sealed grease through first sealing medium injection hole 12 and second sealing medium injection hole 22 respectively like this, just can realize the grease seal through the grease for the seal structure leakproofness that has spring steel plate brush 4 further improves. In a specific embodiment, a grease pressure detection pipeline can be further arranged to detect whether the sealing pressure of the injected grease meets the requirement.

The steel sleeve is decomposed into two sections of ladder-shaped designs, so that the gap between the inner wall of the steel sleeve and the pipe piece is reduced, the two sections of sleeves respectively play respective functions to solve the problem that different states need to be solved during the starting period of the shield 7, the gap between the steel sleeve and the pipe piece is reduced, and the method has stronger adaptability, safety and economy. During the assembly of the two-section steel sleeve, the embedded steel ring 6 of the tunnel portal, or the shield 7, or the counterforce frame 10 can be used for auxiliary installation, the roundness of the two-section steel sleeve can be obviously improved, the structural design and the weight of the steel sleeve can be simplified, and especially the diameter of the shield 7 is bigger, so that the superiority of the device can be embodied.

In a first implementation structure, as shown in fig. 1-4, two sections of sleeves, namely a first ring body 1 and a second ring body 2, are provided together, in order to realize the sealing between the first ring body 1 and the embedded steel ring 6, a spring steel plate assembly 5 is arranged at the front end of the inner side wall of the first ring body 1 along the circumferential direction, the spring steel plate assembly 5 is provided with an elastic sealing part extending towards the direction of the embedded steel ring 6, and the elastic sealing part is used for pressing and pasting on the inner wall of the embedded steel ring 6. The spring steel plate assembly 5 comprises at least two layers of spring steel plates which are distributed in a radial direction and staggered.

The spring steel plate assembly 5 is arranged along the circumferential direction and comprises two layers or three layers of spring steel plates which are staggered and stacked, so that the spring steel plate assembly is convenient to install and detach, one end of the spring steel plate assembly 5 is fixed on the inner wall of the first ring body 1, the other end, namely the elastic sealing part, is pressed and stuck on the inner wall of the embedded steel ring 6, and after the spring steel plates form a whole ring-shaped seal, the spring steel plate assembly has certain sealing capacity.

Further, in order to achieve better connection and detachment between the first ring body and the embedded steel ring and sealing between the first ring body and the embedded steel ring, the two ends of the first ring body 1 are respectively provided with a first flange connection part 11, the first connection part 21 is a second flange connection part, and the first flange connection part 11 is detachably connected with the embedded steel ring 6 and the second flange connection part through the first flange connection parts 11 at the two ends respectively; a plurality of third sealing medium injection holes 13 are formed in the first flange connection part 11 of the first ring body 1, which is close to one end of the embedded steel ring 6, along the circumferential direction. The third sealing medium injection hole 13 may be like grease or polyurethane injected between the first flange connection portion 11 and the pre-buried steel ring 6, and the sealing capability between the first flange connection portion 11 and the pre-buried steel ring 6 is increased by injecting shield tail grease or polyurethane.

Preferably, the first flange connection part 11 of the embedded steel ring 6 can be provided with a mounting groove for mounting an air bag, the air bag is further sealed, grease can be injected into the mounting groove, and the sealing effect is better.

In a specific embodiment, the connection between the first ring body 1 and the second ring body 2 can be flexible connection, such as connection through a hydraulic cylinder, and further sealing connection can be realized in an embedded manner, namely, the second ring body 2 stretches into the first ring body 1, so that the spring steel plate brush 4 of the first ring body 1 is pressed against the outer wall of the second ring body 2 to form a sealing structure with an inner sleeved connection and an outer sleeved connection, and the sealing effect is better; of course, the diameter of the second ring body 2 is adapted to the first ring body 1.

In the second implementation structure, as shown in fig. 5-9, three sleeves may be provided, that is, the third ring body 100 is included in addition to the first ring body 1 and the second ring body 2, the third ring body 100 is connected between the first ring body 1 and the embedded steel ring 6, and at this time, the third ring body 100 is used as a transition ring and is sealed by the first ring body 1 and the second ring body 2; that is, the segmented sleeve device for shield initiation further comprises a third ring body 100, and the first ring body 1 is connected with the embedded steel ring 6 through the third ring body 100; the inner diameter of the third ring 100 is larger than the inner diameter of the first ring 1, so as to form a debugging area 110 for debugging the cutterhead at the inner side of the third ring 100.

In this way, the third ring body 100 can form the debugging area 110 for debugging the cutterhead before the shield 7 starts, which is more convenient and practical.

Further, the outer wall of the first ring body 1 is provided with at least two groups of linear driving components 200 along the circumferential direction, and the linear driving components 200 can be connected with the first connecting portion 21 of the second ring body 2; the elastic sealing component of the first ring body 1 has a first maximum sealing diameter and a first minimum sealing diameter, and the outer diameter of the second ring body 2 is smaller than the first maximum sealing diameter and larger than the first minimum sealing diameter, so that the second ring body 2 can move to the inner side of the first ring body 1 along with the shield 7.

In this way, the connection can be conveniently performed when the second ring body 2 moves to be adjacent to the first ring body 1 through the linear driving component 200 such as a hydraulic cylinder, after the two ring bodies are connected, the linear driving component 200 can further act, so that the second ring body 2 moves into the first ring body 1, the spring steel plate brush 4 of the first ring body 1 can be pressed against the outer surface of the second ring body 2, and the spring steel plate brush 4 of the second ring body 2 can be pressed against the outer surface of the tunnel duct piece 81, so that a combined sealing structure can be formed, and mud water outside a station can be blocked through a channel between the inner wall of the steel sleeve and the tunnel duct piece 81, so that a better sealing effect can be achieved.

Furthermore, in order to facilitate the connection between the two ends of the linear driving member 200 and the first ring body 1 and the second ring body 2, the first connecting portion 21 includes a first connecting leg 210 disposed on the outer side of the second ring body 2, a first connecting leg 210 corresponding to one of the linear driving member 200 is disposed on the outer side of the first ring body 1, and one end of the linear driving member 200 is mounted on the first connecting leg 210 and the other end is connected with the first connecting leg 210.

In a specific embodiment, since the third ring body 100 is connected to the pre-buried steel ring 6, a spring steel plate assembly 5 may be also provided inside the third ring body 100. Because the second ring body is to extend into the inner side of the first ring body, a filling channel is arranged in the second ring body 2, and a second sealing medium filling hole 13 is formed on the end face of the right end part, so that the second ring body 2 can be better embedded into the first ring body 1.

In other embodiments, if the insertion-time structure is used for installation, the number of spring steel brushes 4 needs to be increased to at least 4 times inside the first ring body 1 if the insertion method of fig. 5 is used. If the insertion mode of fig. 10 is adopted, a sealing section 14 needs to be reserved at the rear end of the first ring body 1, that is, the end close to the second ring body 2, so that the second ring body 2 can be conveniently attached to the inner wall of the first ring body 1 after the first ring body 1, and the spring steel plate brush 4 arranged on the outer wall of the second ring body 2 can be conveniently attached to the inner wall of the first ring body 1. In particular, the second ring 2 may be the structural style of the second ring 2 shown in fig. 5, the structural style of the second ring 2 shown in fig. 10, or other styles, without limitation.

Regarding the first implementation structure, the first ring body 1 can be decomposed into blocks with any size according to the requirement so as to be convenient for installation, the first ring body 1 and the portal embedded steel ring 6 can be connected by bolts or welded, the following description is given by taking the bolt connection as an example in the using process, and the using method of the first implementation structure is shown in connection with fig. 2-4 and comprises the following steps:

1. and installing the base of the first ring body 1, installing the air bag into the installation groove of the first flange connection part 11, and connecting the first flange connection part 11 with the embedded steel ring 6 of the tunnel portal through bolts.

2. The second piece of the first ring body 1 is installed, the air bag is installed in the installation groove of the first flange connection part 11, the second piece of the first ring body 1 is connected with the base through bolts in the axial direction of the tunnel, and if the flange connection is not designed, the second piece can be directly welded with the base.

3. And adjusting the position of the second first ring body 1, and connecting the second first ring body 1 with the embedded steel ring 6 of the portal through bolts.

4. The working contents of the step 2 and the step 3 are repeated until the whole first ring body 1 is connected into a whole steel ring, at this time, the first ring body 1 is reliably connected with the embedded steel ring 6 of the portal, and the roundness of the first ring body 1 can be better ensured because of the support of the embedded steel ring 6.

5. Spring steel plate brushes 4 are installed in the first ring body 1, and the spring steel plate brushes 4 and the first ring body 1 are connected through bolts until all the spring steel plate brushes 4 in the first ring body 1 are installed.

6. And installing a spring steel plate assembly 5, and fixing the spring steel plate assembly 5 with the inner wall of the first ring body 1 by bolts, wherein the spring steel plate assembly 5 is formed by staggering and stacking at least 2 layers.

7. And placing the bottom part of the second ring body 2 in the station foundation pit at a position close to the reaction frame 10, and tightly attaching the reaction frame 10.

8. And a base between the second ring body 2 and the first ring body 1 is arranged, so that the shield 7 is convenient to install.

9. Installing a shield 7, wherein the shield tail of the shield 7 needs to be assembled close to the first sheet of the second ring body 2, and temporarily connecting the first sheet of the second ring body 2 with the shield tail of the shield 7, and at the moment, the first sheet of the second ring body 2 is connected with the shield tail and the upright post of the reaction frame 10; the front end of the second ring body 2 is temporarily connected with the shield tail of the shield 7, and the rear end of the second ring body 2 can be temporarily connected with the reaction frame 10, so that the roundness of the second ring body 2 can be better ensured.

10. After the shield 7 is completely installed, installing a second piece of the second ring body 2, and connecting the second piece of the second ring body 2 with the first piece; during connection, attention is paid to adjusting the roundness precision of the second ring body 2.

11. And 9, repeating the step until all the second ring bodies 2 are completed, and assembling the second ring bodies 2.

12. And the spring steel plate brushes 4 are arranged in the second ring body 2, and are connected through bolts until all the spring steel plate brushes 4 are installed.

13. The tunnel duct pieces 81 are assembled, the tunnel duct pieces 81 are pushed towards the direction of the reaction frame 10 through the pushing oil cylinder 71 on the shield 7, at the moment, the first ring tunnel duct pieces 81 pass through the spring steel plate brushes 4 on the shield 7 and slide through the spring steel plate brushes 4 in the second ring body 2, and the first ring tunnel duct pieces 81 are pressed and stuck on the reaction frame 10.

14. The spring steel plate brush 4 in the second ring body 2 is pressed and stuck on the tunnel segment 81 to form two sealing cavities; the tunnel segment 81 assembled into a whole ring at this time is completely plugged into the second ring body 2, and the tunnel segment 81 can support the second ring body 2, so that the stability of the second ring body 2 is enhanced.

15. The temporary connection between the second ring body 2 and the reaction frame 10 is released, and the connection between the second ring body 2 and the shield tail of the shield 7 is reserved; the tunnel duct piece 81 is continuously assembled, the front shield of the shield 7 is pushed into the first ring body 1 which is already installed until the shield shell of the front shield passes over the first spring steel plate brush 4, and at the moment, the spring steel plate brush 4 is fully pressed on the shell of the shield 7, so that two grease cavities, namely a first sealing cavity and a second sealing cavity, are formed.

16. In the forward moving process of the shield 7, the shield tail drags the second ring body 2 to move forward together; at this time, the spring steel plate brush 4 of the second ring body 2 slides forward along with the shield 7 on the segment.

17. Tail grease is injected through the first sealing medium injection hole 12, and the grease pressure is detected through the grease pressure injection hole.

18. After the grease sealing pressure of the two first sealing cavities meets the requirement, water can be filled and pressurized in the soil bin of the shield 7, the sealing performance of a sealing system consisting of the shield 7, the first ring body 1, the spring steel plate brush 4 and the two first sealing cavities is tested, and when the sealing performance meets the requirement, the starting work of the shield 7 can be started. At the moment, the sealing system consisting of the spring steel plate brush 4, the two first sealing cavities, the first ring body 1 and the shield 7 can prevent muddy water outside the station from entering the channel of the station, and the shield 7 can safely start.

19. The shield 7 continues to advance until the second ring 2 carried by the shield 7 is proximate to the first ring 1.

20. And (5) removing the flange connection between the shield tail of the shield 7 and the second ring body 2.

21. The shield 7 is advanced a short distance.

22. The second ring body 2 and the first ring are flanged.

23. And injecting shield tail grease through the second sealing medium injection hole 22, and detecting the grease pressure of the two second sealing cavities through the grease pressure detection holes until the grease sealing pressure meets the use requirement.

24. And water is injected into the water injection holes formed in the second ring body 2 to test the sealing performance of the second ring body 2 until the sealing capacity of the second ring body 2 meets the use requirement.

25. The shield 7 starts to tunnel continuously, at this time, the pre-buried steel ring 6, the first ring body 1, the second ring body 2 and the tunnel duct piece 81 are in a static state, and after the shell of the shield 7 leaves the spring steel plate brush 4, the combined system formed by the pre-buried steel ring 6, the first ring body 1, the second ring body 2, the first sealing cavity, the second sealing cavity and the tunnel duct piece 81 is sealed by the seal of the initial work.

26. The shield 7 continues tunneling until the tunnel duct piece 81 is long enough, grouting is performed near the embedded steel ring 6 of the tunnel portal, filling grouting is performed on the gap between the tunnel duct piece 81 and the embedded steel ring 6, mud water outside the station is blocked from entering the channel of the station, then the first ring body 1 and the second ring body 2 can be removed, the initial construction work of the shield 7 is finished, and then normal tunneling construction can be performed.

It should be noted that, according to the actual stress requirement, the first ring body 1 or the second ring body 2 is prevented from being displaced on the tunnel axis, and external supports may be added to fix them, and brackets and corresponding supports need to be added to the outside of the first ring body 1 and the second ring body 2, which is not described in detail herein.

The sleeve assembly and the tunnel duct piece 81 are sealed and contacted through the spring steel plate brush 4 and shield tail grease, and thrust of the shield 7 is fully loaded on the tunnel duct piece 81, so that even if the tunnel duct piece 81 is displaced in the tunnel axis direction, the steel sleeve assembly cannot move along with the movement of the tunnel duct piece 81, and therefore the steel sleeve assembly and the embedded steel ring 6 cannot be pulled apart, and therefore, the technical scheme is higher in safety in actual use.

Regarding the second implementation structure, as shown in fig. 5-9, the cutter head comprises a third ring body 100, a first ring body 1 and a second ring body 2 which are sequentially arranged from left to right, wherein the third ring body 100 plays a role of a transition ring, the inner diameter of the third ring body is equivalent to the inner diameter of the embedded steel ring 6, and a space formed in the third ring body 100 can be used as a debugging space for cutter head rotation during the cutter head adjustment. The inner diameter of the cylinder wall of the first ring body 1 is smaller than that of the third ring body 100, the spring steel plate brush 4 assembled in the first ring body 1 is mainly responsible for blocking muddy water outside the station from entering a channel of the station between the shield shell and the first ring body 1, the inner diameter of the second ring body 2 is smaller than that of the first ring body 1, the inner diameter of the second ring body 2 is equal to that of the shield 7 shield tail, and after the spring steel plate brush 4 assembled in the first ring body 1 and the spring steel plate seal brush assembled in the second ring body 2 are stacked together, muddy water outside the station is blocked from entering the channel of the station between the inner wall of the sleeve and the tunnel duct piece 81.

The application method of the implementation structure is as follows:

1. the lower half of the third ring body 100 is installed and connected with the pre-buried steel ring 6.

2. An upper half of the third ring body 100 is mounted and connected to a lower half of the third ring body 100.

3. The upper half of the third ring body 100 is connected to the pre-buried steel ring 6.

4. The lower half of the first ring body 1 and the lower half of the third ring body 100 are connected.

5. The upper half of the first ring body 1 and the lower half of the first ring body 1 are connected.

6. Connecting the first ring body 1 and the third ring body 100

7. A spring steel plate brush 4 is installed.

8. And installing a shield support frame 9 from which the shield 7 starts.

9. And installing a reaction frame 10 and a supporting system started by the shield 7, wherein one end of the shield supporting frame 9 is close to the first ring body 1, and the other end is close to the reaction frame 10.

10. And the shield 7 is assembled on the shield support frame 9, and a space of the second ring body 2 is reserved between the shield tail of the shield 7 and the counter-force frame 10, so that the installation of the second ring body 2 in the later stage is convenient.

11. After the shield 7 is assembled, the cutter disc is pushed into the third ring body 100, and the inner diameter of the first ring body 1 is smaller than that of the third ring body 100, so that the cutter disc of the shield 7 is in a suspended state, and the rotation test of the cutter disc during the debugging of the shield 7 is facilitated.

12. Installing a second ring body 2, and temporarily connecting the second ring body 2 with the shield tail of the shield 7; in the use process, the front half part of the second ring body 2 needs to be inserted into the first ring body 1, so that the flange can only be arranged at the rear end, and the front end needs to be assembled in a field welding mode.

13. The tunnel segment 81 is assembled in the shield tail of the shield 7, and the tunnel segment 81 is pushed toward the reaction frame 10 as a whole in the direction of the reaction frame 10, and the tunnel segment 81 and the reaction frame 10 are fixed.

14. Enough shield tail grease is injected through the first sealing medium injection hole 12 of the first ring body 1 and the second sealing medium injection hole 22 on the second ring body 2, the pressure of the grease cavity is detected through the shield tail grease pressure detection device, and after the shield tail grease pressure meets the requirement, the starting is waited.

15. At least two tracks 3 are arranged at the bottom of the third ring body 100 and the embedded steel ring 6 along the axial direction of the tunnel, and the tracks 3 are slightly lower than the shield body of the shield 7, so that the shield 7 is convenient to support the shield 7 during the starting period, the shield 7 is prevented from sinking, and the shield 7 slides on the tracks 3 during the starting period.

16. The shield 7 starts and tunnels forwards, the segment gradually extends along with the pushing of the shield 7, and the shield 7 pulls the second ring body 2 to approach the first ring body 1.

17. When the second ring body 2 approaches the first ring body 1 quickly, the temporary connection between the second ring body 2 and the shield 7 is released.

18. The shield 7 continues to tunnel forward for a short distance.

19. The hydraulic cylinder is connected with a first connecting bracket and a second connecting bracket on the first ring body 1 and the second ring body 2.

20. The shield 7 continues to advance forward, simultaneously opens the pneumatic cylinder, and second ring body 2 can draw into and imbed in first ring body 1 this moment under the pulling force effect of pneumatic cylinder, until the second connection bracket of second ring body 2 pastes first ring body 1 completely, and the spring steel brush 4 in the first ring body 1 presses the surface of pasting at second ring body 2 this moment, and the combination sealing system that spring steel brush 4 in the second ring body 2 pressed and pasted on tunnel segment 81 forms will block the muddy water outside the station and pass through the passageway between steel sleeve inner wall and the tunnel segment 81.

21. And after the shield 7 leaves the embedded steel ring 6 far enough, cement slurry is injected into a gap between the pipe piece and the embedded steel ring 6 through a reserved grouting hole on the tunnel pipe piece 81 to fill, so that muddy water outside a station is completely blocked from passing through the gap between the embedded steel ring 6 and the tunnel pipe piece 81, and the third ring body 100, the first ring body 1 and the second ring body 2 can be removed, and the starting work of the shield 7 is completed.

The use method has the following advantages:

1. the length of the spring steel plate brush 4 is greatly shortened, and the elastic capability of the spring steel plate brush 4 is stronger, so that the sealing performance of the spring steel plate brush 4 is improved, and the safety of the steel sleeve is improved.

2. The first ring body 1 and the second ring body 2 which are nested inside and outside can also reduce the space for transporting and storing the steel sleeve, thereby being very beneficial to transportation and storage.

3. The telescopic steel sleeve is pulled by a hydraulic cylinder, so that labor is saved, the control is easy, and the disassembly is convenient.

4. There is no hard connection between the tunnel duct piece 81 and the second ring body 2, the thrust of the shield 7 acts on the tunnel duct piece 81, and finally the reaction frame 10 and the support system are transferred, so that if the tunnel duct piece 81 moves in the tunnel axis direction, the steel sleeve system is not carried to move, and the phenomenon of pulling crack between the third ring body 100 and the embedded steel ring 6 is avoided, so that the steel sleeve is ensured not to leak water and mud, which is a great advantage.

It should be noted that, according to the actual stress requirement, the third ring body 100 and the first ring body 1 prevent them from being displaced on the tunnel axis, and it is possible to add external supports to fix them, and it is necessary to add brackets and corresponding supports on the outside of the third ring body 100 and the first ring body 1, which is not described in detail herein.

In other embodiments, the spring steel scrubber may be a spring steel plate or a sealing structure composed of a spring steel plate and steel wires. In the second ring body 2 in fig. 7, 8, 9 and 10, shield tail grease injection holes can be arranged between every two spring steel plate brushes, and the grease injection pipes are hidden at the bottom of the spring steel plate brushes and are not shown in the drawings.

In order to strengthen the connection between the flange portions of the first ring body and the second ring body, the first flange connection portion and the second flange connection portion may be connected by using double rows of bolts, which are not shown in the drawing.

Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a shield constructs to originate with sectional type sleeve device which characterized in that: comprising the following steps:

the first ring body (1) is used for being coaxially connected with an embedded steel ring (6) of the tunnel portal;

the second ring body (2) is detachably connected to the outer side of the shield tail of the shield (7) so as to axially move along with the shield (7), and is provided with an installation channel (23) for a tunnel segment (81) to pass through and a first connecting part (21) for connecting with the first ring body (1);

the elastic sealing parts are axially arranged on the inner walls of the first ring body (1) and the second ring body (2), and each group of elastic sealing parts are circumferentially distributed;

the shield support frame (9) is used for supporting the shield (7) and can be used for the shield (7) to move on the support frame; and

the reaction frame (10) is used for providing support for the tunnel duct piece (81), so that the tunnel duct piece (81) supported by the reaction frame (10) forms a duct piece supporting structure (8) for pushing the shield (7).

2. A segmented sleeve apparatus for shield initiation as claimed in claim 1, wherein: the elastic sealing component of the first ring body (1) is used for sealing between the first ring body (1) and the outer wall of the shield (7), and the elastic sealing component of the second ring body (2) is used for sealing between the second ring body (2) and the tunnel segment (81);

the elastic sealing part of the first ring body (1) is provided with a first sealing diameter, the elastic sealing part of the second ring body (2) is provided with a second sealing diameter, and the first sealing diameter is larger than the second sealing diameter so as to form a stepped sealing structure in the axial direction through the elastic sealing part of the first ring body (1) and the elastic sealing part of the second ring body (2).

3. A segmented sleeve apparatus for shield initiation as claimed in claim 1, wherein: the second ring body (2) has an installation state, an originating state and a sealing state;

in the installation state, the second ring body (2) and the shield (7) are relatively fixed; in an originating state, the second ring body (2) is relatively fixed with the shield (7) and moves along with the shield (7); in the sealed state, the second ring body (2) is disconnected from the shield (7) and is connected with the first ring body (1) through the first connecting part (21).

4. A segmented sleeve apparatus for shield initiation as claimed in claim 1, wherein: the elastic sealing part is a spring steel plate brush (4).

5. A segmented sleeve apparatus for shield initiation according to any one of claims 1-4, wherein: the inner diameter of the first ring body (1) is larger than the inner diameter of the second ring body (2), and the inner diameter of the second ring body (2) is larger than or equal to the outer diameter of the shield (7);

at least two groups of elastic sealing parts are arranged on the first ring body (1) and the second ring body (2), and sealing sections are formed between two adjacent groups of elastic sealing parts; each sealing section on the first ring body (1) can be enclosed with the outer wall of the shield (7) to form a first sealing cavity, and each sealing section on the second ring body (2) can be enclosed with the segment of the shield (7) to form a second sealing cavity; each first sealing cavity is provided with a first sealing medium injection hole (12) which is communicated with each other, and each second sealing cavity is provided with a second sealing medium injection hole (22) which is communicated with each other.

6. A segmented sleeve apparatus for shield initiation as recited in claim 5, wherein: the front end of the inner side wall of the first ring body (1) is provided with a spring steel plate assembly (5) along the circumferential direction, the spring steel plate assembly (5) is provided with an elastic sealing part which extends towards the direction of the embedded steel ring (6), and the elastic sealing part is used for being pressed against the inner wall of the embedded steel ring (6);

the spring steel plate assembly (5) comprises at least two layers of spring steel plates which are distributed in a radial direction and staggered.

7. A segmented sleeve apparatus for shield initiation as recited in claim 6, wherein: the two ends of the first ring body (1) are respectively provided with a first flange connecting part (11), the first connecting part (21) is a second flange connecting part, and the first flange connecting part (11) is detachably connected with the embedded steel ring (6) and the second flange connecting part respectively through the first flange connecting parts (11) at the two ends;

a plurality of third sealing medium injection holes (13) are formed in the first flange connection part (11) of one end, close to the embedded steel ring (6), of the first ring body (1) along the circumferential direction.

8. A segmented sleeve apparatus for shield initiation as recited in claim 5, wherein: the outer wall of the first ring body (1) is provided with at least two groups of linear driving components (200) along the circumferential direction, and the first ring body can be connected with a first connecting part (21) of the second ring body (2) through the linear driving components (200);

the elastic sealing part of the first ring body (1) is provided with a first maximum sealing diameter and a first minimum sealing diameter, and the outer diameter of the second ring body (2) is smaller than the first maximum sealing diameter and larger than the first minimum sealing diameter, so that the second ring body (2) can move to the inner side of the first ring body (1) along with the shield (7).

9. A segmented sleeve apparatus for shield initiation as recited in claim 8, wherein: the first connecting portion (21) comprises first connecting support legs (210) arranged on the outer side of the second ring body (2), the outer side of the first ring body (1) corresponds to the first connecting support legs (210) of the linear driving component (200) respectively, one end of the linear driving component (200) is installed on the first connecting support legs (210) to be connected, and the other end of the linear driving component is used for being connected with the first connecting support legs (210).

10. A segmented sleeve apparatus for shield initiation as recited in claim 8, wherein: the segmented sleeve device for shield initiation further comprises a third ring body (100), and the first ring body (1) is connected with the embedded steel ring (6) through the third ring body (100);

the inner diameter of the third ring body (100) is larger than that of the first ring body (1) so as to form a debugging area (110) for debugging the cutterhead on the inner side of the third ring body (100).

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