CN219910759U

CN219910759U - Pushing system for tunneling construction of T-shaped connecting channels of tunnel group

Info

Publication number: CN219910759U
Application number: CN202320180839.2U
Authority: CN
Inventors: 朱瑶宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-19
Filing date: 2023-01-19
Publication date: 2023-10-27
Anticipated expiration: 2033-01-19

Abstract

The utility model provides a pushing system for tunneling construction of a T-shaped connecting channel of a tunnel group, which comprises a reaction frame and a force transfer component. The force transmission member connects a reaction frame to the main tunnel segment surrounding the originating end of the connection channel, the reaction frame being used to provide support for the tunneling apparatus in the tunneling direction, the supporting force being transmitted via the force transmission member to the main tunnel segment surrounding the originating end of the connection channel, wherein the force transmission member is configured as a tubular structure. According to the scheme, the pushing system cancels the back support, can release the back space of the reaction frame, and provides space convenience for synchronous construction of a plurality of connecting channels, synchronous construction of mechanical connecting channels and synchronous construction of a main tunnel. The force transmission component of the tubular structure is favorable for reducing the number of parts of the pushing system, reducing assembly procedures, improving the intensification effect, reducing the installation degree of freedom of the reaction frame relative to the main tunnel duct piece, and effectively reducing error accumulation compared with the connection of a plurality of dispersing parts.

Description

Pushing system for tunneling construction of T-shaped connecting channels of tunnel group

Technical Field

The utility model relates to the technical field of underground engineering, in particular to a pushing system for tunneling construction of a T-shaped connecting channel of a tunnel group.

Background

According to the specification of subway design specification: and a communication channel is arranged between the two single-line interval tunnels when the continuous length of the tunnels is more than 600 m. The communication channels of subway tunnels and municipal highway tunnels are mostly adopting a mining method. For example, in an area with abundant groundwater, the area is usually reinforced by adopting a freezing method, and then the communication channel is excavated by adopting a mining method. However, the construction of the freezing method is easy to cause bad consequences such as frost heaving, thawing sinking and the like, a certain ground subsidence is usually caused, and even the danger of collapse occurs when the ground subsidence is large, which is particularly difficult to adapt to urban core areas with complex geological conditions and high environmental protection requirements. The construction method has long construction period, usually needs over 100 days of freezing, and then can start excavation, so that the construction period is often 4-6 months. In addition, for the stratum with sand layers and pressure-bearing water, the freezing method has poor effect, is easy to cause accidents, has great influence on environment and has high risk.

In recent years, a method of constructing a connecting channel by adopting an assembled connecting channel structure and adopting a mechanical method is proposed. In the starting process, the pre-supporting trolley is required to be opened and supported on the main tunnel duct piece in the upper, lower, left and right directions to form a full-ring integral pre-supporting structure, and the reaction frame is supported on the main tunnel duct piece on the opposite side of the starting direction to bear thrust as the back rest of the pushing device. Taking subway tunnel construction as an example, the tunnel inside diameter is typically 5.5m to 6m, and in some projects can be even expanded to 8.1m or more. For tunnel construction operations of other projects, the inside diameter of the tunnel may be large or small. While current pre-support structures are able to accommodate tunnel inner diameter requirements varying between 5.5m and 7.1 m. When the tunnel diameter is greater than 7.1m, for example, up to 8.1m, the same support means will result in a very bulky system of pre-support structures. And as the diameter of the tunnel is increased, the adaptability and stability of the main tunnel segment structure and the supporting structure, and the stress change, the structural strength and the like in the construction process are required to be researched again. The current construction method does not provide any reference.

In addition, by adopting the whole-ring integral type pre-supporting structure, the space of the whole main tunnel is occupied by the pre-supporting structure, vehicles cannot pass, and two sides of a construction position cannot be communicated. This results in that the construction of other connection channels or the other construction of the main tunnel can be performed only after the construction of one connection channel is completed, and a plurality of construction processes cannot be performed simultaneously, resulting in an extension of the construction progress. On the other hand, the pushing system in the prior art has a large number of parts, a large amount of time is required for assembly on a construction site, the assembly precision is difficult to control, and the reworking condition caused by overlarge assembly errors often occurs. The pushing system is difficult to intensify and precisely.

Accordingly, there is a need to provide a jacking system for use in connection with tunneling construction that at least partially addresses the above-described problems while achieving intensification and refinement of the equipment system.

Disclosure of Invention

The utility model aims to provide a pushing system for tunneling construction of a T-shaped connecting channel of a tunnel group, so as to realize synchronous construction of various procedures, improve construction efficiency, shorten construction period and realize integral intensification and precision of the pushing system.

According to one aspect of the utility model, the ejector system comprises a reaction frame for providing support for the driving device in the direction of the driving and a force transfer member connecting the reaction frame to the main tunnel segment surrounding the originating end of the communication channel, the support force being transferred via the force transfer member to the main tunnel segment surrounding the originating end of the communication channel, wherein the force transfer member is configured as a tubular structure.

In some embodiments, the tubular structure is arranged to surround an originating end of the communication channel.

In some embodiments, the force transfer member is directly connected to the primary tunnel segment surrounding the originating end of the communication channel.

In some embodiments, the originating end of the communication channel is provided with an originating sleeve connected to the main tunnel segment, and the force transfer member is connected to the originating sleeve.

In some embodiments, the axial end of the tubular structure is provided with a radially outwardly extending flange, by which the tubular structure is fixedly connected.

In some embodiments, the tubular structure is connected by welding, bolting, and/or riveting.

In some embodiments, the side wall of the tubular structure is provided with reinforcing ribs.

In some embodiments, the reaction frame is provided with a material transporting hole penetrating through the reaction frame at a position corresponding to the communication channel, and/or the side wall of the tubular structure is provided with a material transporting hole penetrating through.

In some embodiments, the tubular structure is an integrally formed structure, or assembled from at least two split structures, preferably identical to each other.

In some embodiments, a pushing driving unit is disposed on a side of the reaction frame facing the communication channel.

In some embodiments, the ejector drive unit comprises a drive cylinder at least partially integrated within the reaction frame.

The pushing system and the construction method using the pushing system have the following beneficial technical effects:

the pushing system cancels the back support, not only simplifies the structure and intensifies the whole pushing system, but also releases the back space of the reaction frame, thereby providing space convenience for synchronous construction of a plurality of connecting channels, synchronous construction of mechanical connecting channels and synchronous construction of a main tunnel. In addition, the force transmission component for supporting the reaction frame is of a cylindrical structure, so that the number of parts of the pushing system is reduced, the assembly process is reduced, and the intensification effect is improved. And the cylindrical structure can reduce the installation degree of freedom of the reaction frame relative to the main tunnel segment, and compared with the connection through a plurality of dispersing parts, the device can effectively reduce error accumulation.

The pushing system provided by the utility model has low manufacturing cost, saves construction space due to convenient operation, and can synchronously carry out a plurality of construction procedures, thereby obviously reducing construction cost.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale. Wherein,,

FIG. 1 is a perspective view of a pusher system according to a preferred embodiment of the present utility model;

FIG. 2 is a side view of the pusher system shown in FIG. 1;

FIG. 3 is a perspective view of a force transfer member of the pusher system shown in FIG. 1;

FIG. 4 is a force analysis model of a primary tunnel segment and a connecting channel opening door ring; and

fig. 5 and 6 are respectively the results of the force analysis of the main tunnel segment and the connecting channel opening door ring under different pushing pressures.

Detailed Description

Specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present utility model, and other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment, and are intended to fall within the scope of the utility model as well.

In order to realize the intercommunication of underground space networks, a large number of T-shaped connecting tunnels are required to be constructed. Such as: subway, highway section communication channel, subway access & exit and wind shaft, municipal administration piping lane examine workover, long tunnel middle wind shaft, water service tunnel connecting wire etc.. The utility model provides a pushing system suitable for tunnel group T-shaped connection channel construction by a mechanical method. The connecting channel can be an assembled connecting channel formed by assembled units such as duct pieces or pipe joints. The communication channel can be used for communicating two subway main tunnels.

Referring to fig. 1 and 2, a pusher system 10 according to a preferred embodiment includes a reaction frame 11 and a force transfer member 12. During the construction of the mechanical communication channel, the pushing system 10 is fixed in the main tunnel 1 at a position corresponding to the communication channel to be tunneled. The force transmission member 12 is used to connect the reaction frame 11 with a corresponding segment of the main tunnel 1 (which may be referred to as a main tunnel segment) surrounding the originating end of the communication channel. The reaction frame 11 is used to provide support for the ripping apparatus. Wherein the supporting forces are finally transferred via the force transfer member 12 to the main tunnel segment surrounding the originating end of the communication channel. Thus, the force supporting the forward tunneling of the tunneling apparatus is provided by the main tunnel segment on the same side.

As shown in fig. 4, with the diameter of the main tunnel segment being R1, a connecting channel with the diameter of R2 is excavated on the main tunnel segment, and the stress analysis is performed on the main tunnel segment and the door ring forming the connecting channel. The results show that with the pushing system 10, the local concentrated stress of the main tunnel segment is up to 10-20 MPa, and is mainly concentrated on the periphery of the force transfer member, and the force transfer member can be treated by locally reinforcing the periphery of the force transfer member. Under the action of 250-450 kPa pushing distribution force, the maximum horizontal lateral displacement of the opening position of the communication channel reaches-1.0 to-1.5 mm, and the horizontal inward convergence trend has less influence on the uncut whole ring of the adjacent main tunnel segment. Specifically, taking R1 as 8.1m and R2 as 3.65m as examples, the results of the stress analysis of the main tunnel segment and the door ring forming the connecting channel are shown in fig. 5 and 6, respectively. It can be seen that the maximum displacement deformation of the main tunnel segment is-1.2 mm and the maximum displacement deformation of the aperture ring forming the communication channel is-1.2 mm when bearing a pushing force of 450kPa at maximum. Therefore, the pushing system 10 can be used for mechanically constructing the connecting channel, so that the stress redistribution of the main tunnel segment in the process of connecting channel hole breaking can be met, the safety and stability of structural stress can be ensured, and the pushing system 10 is feasible. Even for large diameter tunnels (e.g., 8.0m and above).

By using the pushing system 10 according to the present utility model for mechanical contact channel construction, a support structure provided between the side of the main tunnel 1 facing away from the originating end of the contact channel and the reaction frame 11 (i.e., the reaction frame 11 is a reaction frame without back rest) can be omitted, so that the main tunnel 1 can still retain a sufficient passage space while performing mechanical contact channel construction. Vehicles, personnel, materials and the like can be transferred between different positions of the main tunnel 1 by utilizing a passing space on one side of the reaction frame 11, which is far away from the connecting channel, so that various construction procedures can be synchronously carried out, and particularly, construction of a plurality of connecting channels can be simultaneously carried out at different positions of the completed main tunnel, and the construction period can be greatly shortened. Preferably, the maximum distance between the side of the reaction frame facing away from the connecting channel and the segment wall of the main tunnel may be set to be not less than one third of the radial dimension of the main tunnel, so as to ensure that the passage space has a sufficient dimension for passage. The maximum distance of the traffic space can even be set to be not less than one half of the radial dimension of the main tunnel when the diameter of the main tunnel is large.

In order to meet the supporting effect on the driving device, the reaction frame 11 is made of a rigid material, such as steel or a composite material. The reaction frame 11 has a size adapted to the size of the tunneling apparatus used for excavating the communication channel, and has a rigidity set so as to satisfy the requirement of deformation resistance in the pushing tunneling construction. In some embodiments, the reaction frame 11 may be configured in a substantially rectangular shape. Of course, the reaction frame 11 may be configured in a circular shape, a ring shape or any other shape that meets the construction requirements as an alternative embodiment.

As shown in fig. 3, according to the utility model, the force transmission member 12 of the pushing system 10 is configured as a cylindrical structure, for example a cylindrical structure. It will be appreciated that the cross-section of the tubular structure perpendicular to the axial direction may be other than circular, such as rectangular, oval, etc. The tubular structure is connected with the reaction frame 11 and the segment of the main tunnel 1 surrounding the starting end of the communication channel through the two axial ends of the tubular structure so as to realize the effect of transferring supporting force. Wherein, at one side of main tunnel section of jurisdiction, tubular structure can be directly with main tunnel section of jurisdiction connection. It will be appreciated that the primary tunnel segment designed for use in excavating a connection channel may comprise a specially designed steel structure for added strength. The force transfer member 12 may preferably also be of similar steel construction. The force transfer member 12 may thus be directly connected to the main tunnel segment using, for example, welding. Preferably, the end of the force transfer member 12 facing the originating end of the communication channel is configured in the shape of a space curve to follow the arcuate shape of the corresponding primary tunnel segment. This facilitates the connection of the force transfer member 12 with the main tunnel segment at any desired location along the circumference of the force transfer member 12. In order to ensure the connection strength, it is preferably possible to connect continuously over the entire circumference of the force-transmitting member 12. Furthermore, other connection means, such as bolting, riveting, etc., may also be used in connection of the force transfer member 12 with the main tunnel segment, alone or in combination.

Preferably, in some embodiments, the originating end of the contact channel may be provided with an originating sleeve 13, which is fixedly connected to the main tunnel segment. The fixed connection mode can be pre-buried, welded, bolted, sleeve connection and the like. Further, the end of the force transfer member 12 facing the communication channel may be connected to the originating sleeve 13. In other words, the force transfer member 12 connects the reaction frame 11 indirectly to the main tunnel segment through the originating sleeve 13. At this time, only one end of the starting sleeve 13 connected with the main tunnel segment needs to be set to be in a space curve shape fitting the arc shape, while the end of the starting sleeve 13 connected with the force transfer member 12 needs to be set to be in a relatively common plane round shape or other plane structures (depending on the shape of the two perpendicular to the axial section), so that the cylindrical structure of the force transfer member 12 does not need to be specially set, and the structural design and the production and the manufacture are relatively simple. It will be appreciated that connection means such as welding, bolting and riveting etc. may equally be used alone or in combination in the connection of the force transfer member 12 with the originating sleeve 13.

Preferably, the force transfer member 12 may be constructed as an integrally formed cylindrical structure. I.e. the force transfer member 12 itself is a unitary member, which is advantageous for reducing the number of parts of the pushing system and thus for reducing the assembly process and for enhancing the strength of the pushing system. And compared with a force transmission component formed by a plurality of dispersing components, the integrally formed tubular structure can reduce the installation freedom degree of the reaction frame 11 relative to the main tunnel pipe piece, and compared with the connection of the dispersing components, the integrated force transmission component can effectively reduce error accumulation. In other embodiments, the force transfer member 12 may also be a tubular structure formed from at least two separate structures, which may reduce difficulties in handling, transportation and storage due to the overall size of the tubular structure being oversized. The at least two separate structures may be preferably axisymmetric with respect to the axis of the tubular structure, or may be small tubular structures segmented along the axis of the tubular structure. Preferably, each split structure is identical to each other. In this way, the split structures are interchangeable with each other and there is no specific assembly location, which reduces the likelihood of installation errors.

Preferably, the two ends of the tubular structure of the force transfer member 12 are provided with cuffs 121 which extend substantially radially outwardly of the tubular structure. The force transmission member 12 is connected to the reaction frame 11 and to the main tunnel segment or the starting sleeve 13 by means of a flange 121. When the force transfer member 12 is connected to the originating sleeve 13, a similar flange 131 may also be provided at the end of the originating sleeve 13. In this way the flange facilitates a quick alignment of the originating sleeve 13 with the force transfer member 12 during assembly and the flange may increase the contact area at the connection site, which is advantageous for increasing the connection strength and reducing the stress caused by the connection.

Further, the cylindrical structure is also provided with reinforcing ribs 123 to increase its structural strength. In the illustrated embodiment, the reinforcing ribs 123 are provided on the outer side surface of the wall of the tubular structure, preferably extending in the axial direction, and are provided in plurality at intervals along the circumferential direction of the tubular structure. It will be appreciated that in other embodiments, the ribs 123 may be configured in other forms, such as extending circumferentially, or providing circumferentially and axially extending and staggered ribs, respectively, etc.

The walls of the tubular structure are also provided with material transport apertures 122. In the process of tunneling the connecting channel, the materials such as the segments or the pipe sections used for assembling the connecting channel can be transported to the assembling position through the material transporting holes 122. Preferably, the material transport apertures 122 may be arranged in a plurality of circumferentially spaced apart, preferably uniform, locations along the tubular structure while ensuring structural strength of the force transfer member 12. In this way, the force transfer member 12 has a plurality of possible mounting locations, and when assembling the force transfer member 12, only any one of the material transport holes 122 needs to be oriented in the feeding direction, i.e. any mounting location is satisfied, so that quick positioning can be achieved. In addition, as shown in fig. 1, a similar material transport hole 111 may be provided through the reaction frame 11 to facilitate transport of material transported from the side of the reaction frame 11 facing away from the communication channel.

In some embodiments, the force-transmitting member 12, which is configured as a cylindrical structure, itself transmits only the supporting force and cannot provide any driving or pushing force. Preferably, the side of the reaction frame 11 facing the communication channel may be provided with a push drive unit 14. In some embodiments, the ejector drive unit 14 may include a hydraulically or pneumatically driven drive cylinder. Preferably, the ejector drive unit 14 comprises a plurality of hydraulic cylinders arranged in a quadrant-symmetrical manner about the central axis of the communication channel so as to provide a uniform driving force to the ripping apparatus in the circumferential direction. By controlling the strokes of the hydraulic cylinders in different positions, the pushing drive unit 14 can also adjust the angle of the tunneling direction of the tunneling apparatus relative to the central axis of the communication channel so as to make the tunneling direction coincide with the central axis or meet the requirements of other angle adjustment. In addition, when the tunneling device is a shield tunneling machine, the tunneling device does not need to be provided with driving force by the pushing system. At this time, the jack drive unit 14 serves only as an angle adjustment unit, and since it is not necessary to provide a very large driving force, a smaller size and specification of hydraulic cylinder can be selected accordingly. Further, it is also possible to provide abutments (not shown) which are each connected to an end of the hydraulic cylinder facing away from the reaction frame 11. The pushing driving unit 14 is abutted with the pipe piece of the tunneling equipment or the communication channel through an abutting piece. In some embodiments, the abutment may specifically be an annular top iron.

In addition, in order to achieve the intensification of the system, the drive cylinder of the pushing drive unit 14 is at least partially integrated inside the reaction frame 11. On the one hand, the pushing driving unit 14 and the reaction frame 11 can be formed into an integral structure, and then are hoisted to the construction site after being assembled outside the construction site, so that the trouble of assembling on a relatively narrow construction site is avoided, and the intensification of equipment facilities is realized. On the other hand, the reaction frame 11 can also protect parts such as pipelines of the pushing driving unit 14, and the possibility of damage to the pushing driving unit 14 caused by the complex environment of the construction site is reduced.

The foregoing description of various embodiments of the utility model has been presented for the purpose of illustration to one of ordinary skill in the relevant art. It is not intended that the utility model be limited to the exact embodiment disclosed or as illustrated. As above, many alternatives and variations of the present utility model will be apparent to those of ordinary skill in the art. Thus, while some alternative embodiments have been specifically described, those of ordinary skill in the art will understand or relatively easily develop other embodiments. The present utility model is intended to embrace all alternatives, modifications and variations of the present utility model described herein and other embodiments that fall within the spirit and scope of the utility model described above.

Claims

1. A pushing system for tunnel group T-shaped connection channel tunneling construction, the connection channel being used for connecting at least one main tunnel, characterized in that the pushing system comprises a reaction frame (11) and a force transfer member (12), the force transfer member (12) connects the reaction frame (11) to a main tunnel segment surrounding an originating end of the connection channel, the reaction frame (11) is used for providing support for tunneling equipment in a tunneling direction, a supporting force is transferred to the main tunnel segment surrounding the originating end of the connection channel via the force transfer member (12), wherein the force transfer member (12) is configured as a cylindrical structure.

2. The pushing system of claim 1, wherein the barrel structure is disposed about an originating end of the communication channel.

3. The pushing system according to claim 1, characterized in that the force transfer member (12) is directly connected with the main tunnel segment surrounding the originating end of the communication channel.

4. The pushing system according to claim 1, characterized in that the originating end of the communication channel is provided with an originating sleeve (13) connected to the main tunnel segment, the force transfer member (12) being connected with the originating sleeve (13).

5. The pushing system according to claim 3 or 4, characterized in that the axial end of the tubular structure is provided with a radially outwardly extending flange (121), the tubular structure being fixedly connected by the flange (121).

6. The pushing system of claim 5, wherein the tubular structure is attached by welding, bolting, and/or riveting.

7. The pushing system according to claim 1, characterized in that the side wall of the tubular structure is provided with stiffening ribs (123).

8. The pushing system according to claim 1, characterized in that the reaction frame (11) is provided with a material transport hole penetrating the reaction frame (11) at a position corresponding to the communication channel and/or that the side wall of the tubular structure is provided with a material transport hole (122) penetrating.

9. The pushing system of claim 1 wherein the tubular structure is an integrally formed structure or is assembled from at least two separate structures.

10. The pushing system of claim 9 wherein the at least two split structures are identical to one another when the tubular structure is assembled from the at least two split structures.

11. The pushing system according to claim 1, characterized in that a side of the reaction frame (11) facing the communication channel is provided with a pushing drive unit (14).

12. The jacking system according to claim 11, characterized in that the jacking drive unit (14) comprises a drive cylinder at least partially integrated inside the reaction frame (11).