Narrow space double-shield TBM starting device

Abstract

The utility model discloses a narrow space double-shield TBM starting device which comprises a negative ring reaction frame, a negative ring duct piece, a first positive ring reaction frame and a first positive ring duct piece, the negative ring reaction frame is of a frame structure shaped like a Chinese character'ao ', and the negative ring reaction frame is fixedly connected with a steel plate embedded in the bottom of a starting place. The plurality of negative ring segments are arranged on a pre-embedded steel plate at the bottom of a starting place, the plurality of negative ring segments are located between the negative ring reaction frame and the first positive ring segment, the first positive ring reaction frame is of a triangular frame structure, and the first positive ring reaction frame is fixedly connected with a pre-embedded steel plate at the top of the starting place; the top of the first positive ring duct piece is fixedly connected with the first positive ring reaction frame, and the bottom of the first positive ring duct piece is fixedly connected with one of the negative ring duct pieces. The narrow space double-shield TBM starting device is simple in structure and convenient to use, and the narrow space double-shield TBM starting efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering construction, and particularly relates to a double-shield TBM launching device for a narrow space. Background Art

[0002] At present, when the double-shield TBM starts, it needs the help of negative rings and reaction frames to change steps and move forward. According to the different starting working environments, it is divided into starting from a vertical shaft and starting from a drill-and-blast hole. When starting from a vertical shaft, due to the large upper space, a circular reaction frame can be installed with lifting equipment, and the reaction frame can be fixed on the end wall and the bottom plate. By assembling a whole ring of negative rings, a reaction force is provided for the forward movement of the double-shield TBM; when starting from a drill-and-blast hole, due to space limitations, the tunnel needs to be expanded during the drilling and blasting stage, and a lifting device needs to be pre-buried in the top arch. The overall construction is time-consuming, costly, difficult to operate, and has high safety risks. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a device with a simple structure, easy use and the ability to effectively improve the launching efficiency of a double-shield TBM in a narrow space.

[0004] The technical solution of the present utility model is: a double-shield TBM starting device in a narrow space, comprising: a negative ring reaction frame, a negative ring segment, a positive ring reaction frame, and a positive ring segment. The negative ring reaction frame is a concave frame structure, the negative ring reaction frame is fixedly connected to the pre-embedded steel plate at the bottom of the starting point, and several negative ring segments are arranged on the pre-embedded steel plate at the bottom of the starting point. The several negative ring segments are located between the negative ring reaction frame and the positive ring segment. The positive ring reaction frame is a triangular frame structure, the positive ring reaction frame is fixedly connected to the pre-embedded steel plate at the top of the starting point, the top of the positive ring segment is fixedly connected to the positive ring reaction frame, and the bottom of the positive ring segment is fixedly connected to one of the negative ring segments.

[0005] Furthermore, a plurality of diagonal braces are provided on the negative ring reaction frame.

[0006] Furthermore, the positive ring segment is fixedly connected to the negative ring segment by bolts.

[0007] The beneficial effects of the utility model are as follows: a double-shield TBM starting device in a narrow space of the utility model reduces the requirements of the double-shield TBM on the starting site by using a negative ring reaction frame, a negative ring segment, a positive first ring reaction frame and a positive first ring segment, and reduces the engineering workload of tunnel expansion in the drilling and blasting section. Specifically, the lower auxiliary thrust cylinder of the double-shield TBM pushes the negative ring segment to change steps and move forward, and the double-shield TBM support shoe holds the starting hole wall tightly. After one ring of forward excavation is completed, the support shoe is retracted, and the lower auxiliary thrust cylinder pushes the negative ring segment to push The tail shield and the supporting shield move forward, and at the same time, the rear trailer is pulled forward. After moving forward to the right position, the support boots tighten the starting tunnel wall again to start the next ring of excavation. At the same time, the two negative ring segments are assembled. Through cyclic excavation and step changing, until the positive ring segment is assembled, at this time, the auxiliary thrust cylinders of the double-shield TBM are all extended to push the positive ring segment and change steps forward to complete the starting. In summary, the utility model is a narrow space double-shield TBM starting device with a simple structure and easy use, which can effectively improve the starting efficiency of the double-shield TBM in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0009] Figure 1 This is a structural schematic diagram of a double-shield TBM launching device for a narrow space according to the present invention.

[0010] Figure 2 It is a side structural diagram of a double-shield TBM launching device for a narrow space according to the utility model.

[0011] Figure 3 The utility model is a structural schematic diagram of a negative ring reaction frame of a double-shield TBM launching device in a narrow space.

[0012] In the figure: 1-negative ring reaction frame, 2-negative ring segment, 3-positive ring reaction frame, 4-positive ring segment. DETAILED DESCRIPTION

[0013] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0014] likeFigures 1-3 As shown, a double-shield TBM launching device in a narrow space includes: a negative ring reaction frame 1, a negative ring segment 2, a positive first ring reaction frame 3, and a positive first ring segment 4. The negative ring reaction frame 1 is a concave frame structure (H-shaped steel with a diameter of 350×350mm is selected as the vertical support member, and a round steel pipe with a diameter of 300mm and a wall thickness of 10mm is selected as the diagonal support member). The negative ring reaction frame 1 is fixedly connected to the pre-buried steel plate at the bottom of the launching site. Several negative ring segments are fixedly connected to the starting site. 2 is arranged on the pre-buried steel plate at the bottom of the starting point. The several negative ring segments 2 are located between the negative ring reaction frame 1 and the positive ring segment 4. The positive ring reaction frame 3 is a triangular frame structure (20a I-beam is selected as the vertical support and diagonal bracing member). The positive ring reaction frame 3 is fixedly connected to the pre-buried steel plate at the top of the starting point. The top of the positive ring segment 4 is fixedly connected to the positive ring reaction frame 3, and the bottom of the positive ring segment 4 is fixedly connected to one of the negative ring segments 2.

[0015] Preferably, the negative ring reaction frame 1 is provided with a plurality of diagonal braces.

[0016] Preferably, the positive ring segment 4 is fixedly connected to the negative ring segment 2 by bolts.

[0017] When in use, the lower auxiliary push cylinder of the double-shield TBM pushes the negative ring segment 2 to change steps and move forward. The double-shield TBM support boots hold the starting tunnel wall tightly. After one ring of forward excavation is completed, the support boots are retracted, and the lower auxiliary push cylinder pushes the negative ring segment 2 to push the tail shield and support shield forward, while towing the rear supporting trailer forward. After moving forward into place, the support boots again hold the starting tunnel wall tightly to start the next ring of excavation, and assemble the two negative ring segments 2 at the same time. Through cyclic excavation and changing steps, until the positive first ring segment 4 is assembled, all the auxiliary push cylinders of the double-shield TBM are extended to push the positive first ring segment 4 to change steps and move forward to complete the start.

[0018] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and various changes can be made thereto within the scope of knowledge possessed by those skilled in the art.

Claims

1. A double-shield TBM starting device for narrow spaces, characterized in that, Including: Negative ring reaction frame (1), negative ring segment (2), first positive ring reaction frame (3), first positive ring segment (4). The negative ring reaction frame (1) is a concave-shaped frame structure, and the negative ring reaction frame (1) is fixedly connected to the embedded steel plate at the bottom of the starting point. A number of the negative ring segments (2) are arranged on the embedded steel plate at the bottom of the starting point, and the number of the negative ring segments (2) is located between the negative ring reaction frame (1) and the first positive ring segment (4). The first positive ring reaction frame (3) is a triangular frame structure, and the first positive ring reaction frame (3) is fixedly connected to the embedded steel plate at the top of the starting point. The top of the first positive ring segment (4) is fixedly connected to the first positive ring reaction frame (3), and the bottom of the first positive ring segment (4) is fixedly connected to one of the negative ring segments (2).

2. The double-shield TBM launching device for narrow spaces according to claim 1, characterized in that, A number of diagonal braces are provided on the negative ring reaction frame (1).

3. The double-shield TBM starting device for narrow spaces according to claim 1, characterized in that The first positive ring segment (4) is fixedly connected to the negative ring segment (2) by bolts.

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