Steel support structure for shield stacking tunnel construction

Abstract

The utility model provides a steel supporting structure for shield stacking tunnel construction. The steel supporting structure comprises an annular supporting assembly, a transverse supporting assembly, a vertical supporting assembly and an elastic cushion layer. The annular supporting assembly comprises a top supporting piece, a middle supporting piece and a bottom supporting piece, and the top supporting piece, the middle supporting piece and the bottom supporting piece are sequentially connected and can be assembled into a complete ring shape. The elastic cushion layer is made of an elastic material, and the elastic cushion layer is laid on the outer surface of the annular supporting assembly and used for buffering and protecting the annular supporting structure; the supporting effect of the position of the duct piece can be guaranteed, deformation of the cross section of the duct piece can be controlled, meanwhile, stress concentration generated by rigid contact of the supporting structure and the duct piece is avoided, the attaching degree of the supporting structure and the duct piece is improved, and the supporting effect is improved; through the reasonable structural design, the on-site installation procedure can be simplified, the construction efficiency is improved, and the requirement for the operation space is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, especially a steel support structure for shield stacking tunnel construction. BACKGROUND

[0002] Due to narrow urban underground space, subway double-line tunnels often adopt small clear distance stacking layout, which greatly increases construction difficulty. In the construction process of the trailing line of the stacking tunnel, the existing leading line tunnel will inevitably be adversely affected, resulting in the misalignment and damage of the existing leading line segment. Therefore, during the construction process, a steel support structure is often used to support and protect the leading line tunnel.

[0003] The existing steel support structure adopts bolt connection between modules, which is relatively time-consuming to install and has high requirements for the operation space. In addition, the existing steel support structure and the segment mostly adopt rigid contact in the ring direction. This contact form can easily cause stress concentration in the segment at the support, thereby damaging the segment. On the other hand, the steel support structure is difficult to completely adhere to the segment in the ring direction, affecting the supporting effect. SUMMARY

[0004] The utility model aims at the deficiencies in the above background art, provides an improved steel support structure to simplify the on-site installation process, improve construction efficiency, reduce the requirements for the operation space, and improve the adhesion of the steel support structure to the segment, thereby ensuring the supporting effect of the steel support structure.

[0005] To achieve the above-mentioned purpose, the utility model provides a steel support structure for shield stacking tunnel construction, comprising a ring-shaped support assembly, a horizontal support assembly, a vertical support assembly, and an elastic pad layer.

[0006] The ring-shaped support assembly comprises a top support, a middle support, and a bottom support, which are connected in sequence and can be assembled into a complete ring. The elastic pad layer is made of an elastic material and is laid on the outer surface of the ring-shaped support assembly.

[0007] The horizontal support assembly comprises a movable cross brace, a cross brace connecting hinge, and a cross brace bolt hole. The cross brace connecting hinge is arranged on the first part of the top support. The first end of the movable cross brace is rotationally connected to the first part of the top support through the cross brace connecting hinge. The cross brace bolt hole is arranged on the second part of the top support. The second end of the movable cross brace can be fixed to the cross brace bolt hole through a mounting bolt, and multiple cross brace bolt holes are arranged.

[0008] The vertical support assembly is used to connect the top support and the bottom support.

[0009] Further, the top support comprises a first top support and a second top support, and the first top support is hinged with the second top support.

[0010] Further, the first top support and the second top support are both welded by two mutually perpendicular linear profiles and an arc profile.

[0011] Further, the middle support comprises a first middle support and a second middle support, the bottom support comprises a first bottom support, a second bottom support and a third bottom support, the first middle support is fixedly connected with the first top support and the first bottom support, the second middle support is fixedly connected with the second top support and the second bottom support, and the third bottom support is fixedly connected with the first bottom support and the second bottom support.

[0012] Further, the first middle support, the second middle support and the third bottom support are all arc profiles, and the first bottom support and the second bottom support are both welded by two mutually perpendicular linear profiles and an arc profile.

[0013] Further, the vertical support assembly comprises a first vertical support and a second vertical support, the first vertical support vertically connects the first top support with the first bottom support, and the second vertical support vertically connects the second top support with the second bottom support.

[0014] Further, the first vertical support and the second vertical support are both composed of linear I-shaped steel.

[0015] The above scheme of the utility model has the following beneficial effects:

[0016] The steel support structure for shield stacking tunnel construction provided by the utility model can guarantee the supporting effect of the position of the segment, control the deformation of the cross section, avoid stress concentration caused by rigid contact between the support structure and the segment, improve the adhesion of the support structure and the segment, and improve the supporting effect; the utility model has reasonable structure design, can simplify the on-site installation process, improve the construction efficiency, and reduce the requirement for the operation space.

[0017] Other beneficial effects of the utility model will be described in detail in the following specific embodiment part. ACCURACY OF DRAWINGS

[0018] Figure 1The overall structure schematic view of the utility model;

[0019] Figure 2 The various component schematic view of the utility model;

[0020] Figure 3 The first module, second module schematic view of the utility model;

[0021] Figure 4 The first module, second module expansion schematic view of the utility model;

[0022] Figure 5 The first bottom support, second bottom support, third bottom support schematic view installation schematic view of the utility model.

[0023]

Explanation of reference signs

[0024] 1-elasticity cushion layer;2-first top support;3-second top support;4-first middle support;5-second middle support;6-first bottom support;7-second bottom support;8-third bottom support;9-movable cross brace;10-cross brace connecting hinge;11-cross brace bolt hole;12-first vertical support;13-second vertical support. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise expressly and specifically limited.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] As Figure 1 The embodiment of the utility model provides a steel support structure for shield stacking tunnel construction, including annular support subassembly, transverse support subassembly, vertical support subassembly and elastic cushion 1.

[0031] Annular support subassembly includes first top support piece 2, second top support piece 3, first middle support piece 4, second middle support piece 5, first bottom support piece 6, second bottom support piece 7, third bottom support piece 8. First top support piece 2, second top support piece 3, first bottom support piece 6, second bottom support piece 7 are all by two mutually perpendicular linear I-steel and an arc I-steel welding, and first middle support piece 4, second middle support piece 5, third bottom support piece 8 are all an arc I-steel. Meanwhile, the arc I-steel of annular support subassembly can be assembled into complete ring. Elastic cushion 1 is made of elastic material such as rubber, is laid on the outer surface of each support piece of annular support subassembly through elastic cushion 1, to carry out buffer protection to annular support subassembly, avoids the stress concentration produced by annular support subassembly and segment rigid contact, improves the adhesion of annular support subassembly and segment simultaneously, thereby improve the supporting effect of steel support structure.

[0032] Transverse support subassembly includes movable cross brace 9, cross brace connecting hinge 10 and cross brace bolt hole 11. Wherein, cross brace connecting hinge 10 is arranged on the linear I-steel of first top support piece 2 or second top support piece 3, and the first end of movable cross brace 9 is rotatably connected with first top support piece 2 or second top support piece 3 through cross brace connecting hinge 10. Cross brace bolt hole 11 is arranged on the linear I-steel of second top support piece 3 or first top support piece 2. The second end of movable cross brace 9 can be fixed with cross brace bolt hole 11 through mounting bolt, and a plurality of cross brace bolt holes 11 are arranged in each position for selection.

[0033] The vertical support assembly comprises a first vertical support 12 and a second vertical support 13, both of which are composed of linear I-beams. The first vertical support 12 is used for vertically connecting the linear I-beams of the first top support 2 and the first bottom support 6, and the second vertical support 13 is used for vertically connecting the linear I-beams of the second top support 3 and the second bottom support 7.

[0034] The first top support 2 and the second top support 3 are hinged to each other and can rotate around the hinge point. When they are adjusted in place, the movable cross brace 9 is rotated to align the cross brace bolt hole 11 on the first top support 2 with the second end, and then fixed by the mounting bolt to complete the firm connection of the first top support 2 and the second top support 3.

[0035] The first top support 2, the first bottom support 6, and the arc-shaped I-beam of the first middle support 4 are fixedly connected by mounting bolts. The second top support 3, the second bottom support 7, and the arc-shaped I-beam of the second middle support 5 are fixedly connected by mounting bolts. The arc-shaped I-beams of the third bottom support 8, the first bottom support 6, and the second bottom support 7 are fixedly connected by mounting bolts. The first vertical support 12 and the second vertical support 13 are fixedly connected by mounting bolts with the linear I-beams of the first top support 2 and the first bottom support 6.

[0036] It should be noted that I-beam profiles are preferably used in this embodiment, and other types of profiles that are easy to obtain and have sufficient strength can also be used in other embodiments, and this embodiment is not limited in this regard.

[0037] When the steel support structure provided in this embodiment is used, the dimensions and installation positions of the components of the steel support structure are accurately measured on site using a total station and a level before the steel support structure is installed. After the data measurement is completed, the components of the steel support structure are prefabricated in the factory based on the data, as shown in Figure 2 The first top support 2, the first vertical support 12, and the first middle support 4 are connected by mounting bolts to form a first module, and the second top support 3, the second vertical support 13, and the second middle support 5 are connected by mounting bolts to form a second module, as shown in Figure 3 The movable cross brace 9 is installed, and the first top support 2 and the second top support 3 are hinged. The modules and components that are preliminarily assembled by the trolley are transported into the tunnel. The first module and the second module are lifted above the tunnel. The hinged first module and the second module are unfolded by rotating, and the movable cross brace 9 is fixed by selecting different cross brace bolt holes 11, so that the outer sides of the first module and the second module tightly adhere to the designated installation ring wall surface, as shown in Figure 4The first bottom support 6, the second bottom support 7 and the third bottom support 8 are fixed by mounting bolts, as shown in Figure 5

[0038] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0039] The above embodiments only express several implementation manners of the present application, the description is specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.​

Claims

1. A steel support structure for use in shield overhung tunnel construction, characterized by, The ring-shaped support assembly, the transverse support assembly, the vertical support assembly and the elastic cushion layer are provided. The ring-shaped support assembly comprises a top support, a middle support and a bottom support, which are connected in sequence and can be assembled into a complete ring shape. The transverse support assembly comprises a movable cross brace, a cross brace connecting hinge and a cross brace bolt hole. The vertical support assembly is used for connecting the top support and the bottom support.

2. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 1, wherein The top support comprises a first top support and a second top support.

3. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 2, wherein The first top support and the second top support are both composed of two linear sections perpendicular to each other and an arc-shaped section.

4. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 2, wherein The middle support comprises a first middle support and a second middle support.

5. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 4, wherein The bottom support comprises a first bottom support, a second bottom support and a third bottom support.

6. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 4, wherein The first middle support can be fixedly connected with the first top support and the first bottom support.

7. The steel support structure for use in the construction of a stacked tunnel by a shield method according to claim 6, wherein The second middle support can be fixedly connected with the second top support and the second bottom support. The third bottom support can be fixedly connected with the first bottom support and the second bottom support. The first middle support, the second middle support and the third bottom support are all arc-shaped sections. The first bottom support and the second bottom support are both composed of two linear sections perpendicular to each other and an arc-shaped section. The vertical support assembly comprises a first vertical support and a second vertical support. The first vertical support is vertically connected with the first top support and the first bottom support. The second vertical support is vertically connected with the second top support and the second bottom support. The first vertical support and the second vertical support are both composed of linear I-beams.

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