Supporting system used for on-line shield launching of up-and-down line overlapping tunnel

Abstract

The utility model provides a supporting system for starting of an on-line shield of an up-and-down line overlapping tunnel. The supporting system comprises a post-pouring middle plate, a starting bracket, a disc buckle frame and a steel pipe column. The steel pipe column is embedded into the post-pouring middle plate through the embedded steel bars at the head, and the steel pipe column is tightly connected with the post-pouring middle plate after being integrally poured. And the disc buckle frame is in bolted connection with the middle plate. The disc buckle frame and the steel pipe column are arranged below the middle plate and jointly support a starting platform composed of the post-cast middle plate and the starting bracket above the disc buckle frame and the steel pipe column. The launching system is quick, simple and convenient to mount and demount, the problems of welding construction and stability of a traditional launching device of a double-layer steel frame structure are solved, the construction cost is reduced, and the launching construction efficiency of the upper tunnel in the overlapped tunnel is improved to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a support system for launching an upper shield machine in an upper and lower stacked tunnel. Background Art

[0002] Due to limited urban space, an increasing number of subway tunnels require overlapping wiring, inevitably leading to a large number of overlapping tunnel launch projects. During the construction of overlapping tunnels, the launch phase is a critical step in the overall tunnel construction process. Due to the unique structure of overlapping tunnels, the support system during this phase requires high stability, safety, and adaptability. Existing support systems have limitations when dealing with complex geological conditions and high-load construction requirements, which can easily lead to construction safety hazards and low efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a support system for starting a shield machine on a stacked tunnel, so as to solve the problems raised in the above-mentioned background technology.

[0004] The utility model provides the following technical solutions: a support system for the launch of a shield machine on a stacked tunnel, which includes a launch platform, a disc-shaped frame, a steel pipe column support, and a reaction frame. The disc-shaped frame relies on its own adjustable base to be placed on the station floor, and is connected to the launch platform above it by bolts. The bottom of the steel pipe column is based on a longitudinal beam, and the foundation is effectively connected to the floor through embedded reinforcement. The top of the steel pipe column penetrates into the post-cast middle plate through embedded reinforcement, and is later cast as a whole with the middle plate. At the same time, longitudinal beams and transverse beams are added at the connection between the upper part of the steel pipe column support and the post-cast middle plate, and the two longitudinal beams are in the form of upturned beams as the shield launch bracket. The post-cast middle plate and the launch bracket placed above it together constitute the launch platform. The reaction frame is arranged at the tail end of the launch platform, and the launch platform is supported by the steel pipe column and the disc-shaped frame system.

[0005] The reaction frame consists of a first door frame, a second door frame, a third door frame, a fourth door frame and a movable joint. The lower end and the right end of the first door frame are respectively connected to the upper end of the second door frame and the left end of the fourth door frame through a movable joint. The left end and the upper end of the third door frame are respectively connected to the right end of the second door frame and the lower end of the fourth door frame through a movable joint.

[0006] Furthermore, a shield machine is arranged on the starting bracket of the starting platform, and a shield rear accessory is arranged at the rear end of the shield machine, and the shield rear accessory is located on the middle plate of the station.

[0007] Compared with the existing technology, the advantages of the present invention are: 1) the post-cast middle plate + disc buckle frame + steel pipe column support system is quick and easy to install, avoiding the welding construction of the traditional double-layer steel structure starting frame and shortening the construction period; 2) the concrete structural column supports the top plate post-cast strip, replacing the traditional support system, reducing material occupation and maintenance, and improving support stability; 3) the disc buckle bracket is efficient, material-saving and durable, and uses half the steel compared to traditional scaffolding, significantly reducing costs; 4) the process of assembling and dismantling the starting support system greatly reduces the workload of welding, saving time and reducing environmental pollution; BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a front view schematic diagram of the starting support system of the utility model;

[0009] Figure 2 This is a schematic structural diagram of the reaction frame of the utility model;

[0010] Figure 3 This is a schematic diagram of the position of the initial support system when the utility model is initially put into operation in the tunnel.

[0011] Figure markings: 1-starting platform, 101-post-cast middle plate, 102-starting bracket, 2-reaction frame, 3-steel pipe column support, 4-disc buckle frame system, 5-base plate, 6-shield machine, 7-shield rear supporting equipment, 8-station middle plate, 21-first gantry, 22-second gantry, 23-third gantry, 24-fourth gantry, 25-movable joint, 41-vertical pole, 42-cross bar, 43-diagonal bar, 44-adjustable base. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0013] Reference Figure 1 A support system for the launch of a shield machine on an upper and lower stacked tunnel includes 1-launching platform, 101-post-cast middle plate, 102-launching bracket, 3-steel pipe column support, 4-disc-and-hook frame system, and 5-base plate. The disc-and-hook frame relies on its own adjustable base to be placed on the station base plate and is connected to the launch platform above it by bolts. The bottom of the steel pipe column is based on a longitudinal beam, which is effectively connected to the base plate through embedded steel bars. The top surface of the foundation is pre-embedded with steel plates for welding and fixing the support. In order to ensure the safety of the node structure between the steel support and the middle plate support, longitudinal and transverse beams are added to the support node position. The top of the steel pipe column penetrates into the post-cast middle plate through embedded steel bars and is cast integrally with the middle plate at a later stage. The post-cast middle plate and the launch bracket placed above it together form the launch platform. The reaction frame is set at the tail end of the launch platform. The launch platform is supported by the steel pipe column and the disc-and-hook frame system.

[0014] Reference Figure 2 The reaction frame 2 is composed of a first door frame 21, a second door frame 22, a third door frame 23, a fourth door frame 24 and an active joint 25. The lower end and the right end of the first door frame 21 are respectively connected to the upper end of the second door frame 22 and the left end of the fourth door frame 24 through the active joint 25. The left end and the upper end of the third door frame 23 are respectively connected to the right end of the second door frame 22 and the lower end of the fourth door frame 24 through the active joint 25.

[0015] Reference Figure 3 A shield machine 6 is provided on the starting bracket 102 , and a shield rear supporting device 7 is provided at the rear end of the shield machine. The shield rear supporting device 7 is located on the station middle plate 8 , and the reaction frame 2 is located at the rear end of the starting platform 1 .

[0016] The following is a brief introduction to the operating steps of the support system:

[0017] Step 1: Connect the bottom longitudinal beam foundation of the steel pipe column support 3 to the bottom plate through embedded reinforcement, weld the embedded steel plate on the top plate of the foundation to the bottom of the steel pipe column to strengthen the fixation, add longitudinal beams and transverse beams at the connection between the upper part of the steel pipe column support 3 and the post-cast middle plate 101, and at the same time, the two longitudinal beams are in the form of upturned beams as the shield starting bracket 102.

[0018] Step 2: Place several adjustable bases 41 of the truss system 4 on the station floor 5. Connect the vertical poles 41 to the base by inserting the base sleeves. Use truss pins to connect the vertical poles 41, crossbars 42, and diagonal bars 43 to form a complete assembly. The truss system 4 and the steel pipe column 3 supports are staggered. Simultaneously, the post-cast center plate 101 and the top rebar of the steel pipe column supports 3, extending into the center plate, are integrally cast.

[0019] Step 3: After the support system is stable, the shield machine 6 is assembled and debugged on the starting platform 1. After the start of the shield machine in the online tunnel is completed, the reaction frame 2 is removed, and the shield rear supporting device 7 located on the station middle plate 8 is connected to the shield machine in the online tunnel to start the subsequent excavation construction.

[0020] The present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims.

Claims

1. A support system for launching a shield machine on a stacked tunnel, characterized in that: include: The starting platform (1), the reaction frame (2), the steel pipe column support (3), and the buckle frame system (4), wherein the starting platform (1) is composed of a post-cast middle plate (101) and a starting bracket (102); the starting platform (1) is connected to the buckle frame system (4) by bolts, the adjustable base (44) of the buckle frame system (4) is directly placed on the bottom plate (5) and connected to the starting platform (1) above it by bolts, and the steel pipe column support (3) is extended into the back plate through the top of the planting bar. The middle plate (101) is poured and cast as a whole in the later stage. At the same time, longitudinal beams and transverse beams are added at the connection between the upper part of the steel pipe column support (3) and the later poured middle plate (101). At the same time, the two longitudinal beams are in the form of upturned beams and serve as the shield starting bracket (102). The bottom of the steel pipe column support (3) is based on the longitudinal beams, and the foundation is effectively connected to the bottom plate (5) through embedded reinforcement. The reaction frame (2) is fixed above the starting platform (1) by bolts, and the reaction frame (2) is set at the tail end of the starting platform (1).

2. The support system for launching a shield machine on a stacked tunnel according to claim 1, characterized in that: The reaction frame (2) is composed of a first door frame (21), a second door frame (22), a third door frame (23), a fourth door frame (24) and a movable joint (25). The lower end and the right end of the first door frame (21) are respectively connected to the upper end of the second door frame (22) and the left end of the fourth door frame (24) through the movable joint (25), and the left end and the upper end of the third door frame (23) are respectively connected to the right end of the second door frame (22) and the lower end of the fourth door frame (24) through the movable joint (25).

3. The support system for launching a shield machine on a stacked tunnel according to claim 1, characterized in that: The buckle frame system (4) is composed of a vertical rod (41), a horizontal rod (42), an oblique rod (43), and an adjustable base (44). The vertical rod (41) is connected to the base by inserting a base sleeve, and the vertical rod (41), the horizontal rod (42), and the oblique rod (43) are connected by a pin-type connection.

4. The support system for launching a shield machine on a stacked tunnel according to claim 1, characterized in that: A shield machine (6) is arranged on the starting bracket (102), and a shield rear supporting device (7) is arranged at the rear end of the shield machine (6), and the shield rear supporting device (7) is located on the station middle plate (8).

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