Tunnel open hole lining steel frame reinforcement structure

Abstract

The utility model discloses a tunnel open hole lining steel frame reinforcement structure, including a scaffolding and a lining steel frame, a plurality of columns are arranged between the scaffolding and the ground, the scaffolding is located directly above the lining steel frame, a plurality of suspension rods are arranged between the scaffolding and the lining steel frame, the two ends of the suspension rods are respectively fixed on the longitudinal main bars of the scaffolding and the lining steel frame, and the suspension rods suspend and pull the lining steel frame. Compared with the prior art, the utility model can effectively suspend and position the lining steel frame of a large-section flat tunnel open hole lining, prevent it from deformation and overturning, and ensure the thickness of the steel protection layer.

Description

Technical Field

[0001] The utility model belongs to the field of tunnel construction, and in particular relates to a reinforcement structure of a steel bar skeleton for an open tunnel lining. Background Art

[0002] Open-cut tunnels refer to tunnels built by open-cut method or in the open air, and their roof and arch back may be covered with backfilled soil and rocks, or not. Tunnels that pass under roads, railways, buildings, snow shelters, sunshade holes, etc., and are built by digging up the surface soil to build the tunnel structure and then backfilling or building other buildings on top, can be called open-cut tunnels.

[0003] In the construction of open tunnels, it is necessary to construct an inverted arch on the ground, pour concrete to form the inverted arch bottom plate, and set up a lining steel skeleton on the basis of the inverted arch bottom plate. The trolley is used as the inner mold, and the outer mold is laid on the outer surface of the lining steel skeleton. The trolley is used to pour concrete on the lining steel skeleton to form the lining. Among them, the lining steel skeleton consists of longitudinal main bars, annular main bars, limit steel bars and tie steel bars. The limit steel bars are located between the longitudinal main bars and the annular main bars, and the tie steel bars are arranged alternately between the longitudinal main bars and the annular main bars.

[0004] With the increase in tunnel traffic, the cross-sectional size is also larger than before, and many large-span, flat tunnel open-hole structures have appeared in various projects. The traditional open-hole steel bar construction method cannot overcome the problem of instability and collapse of large-span arched steel bar skeletons, and there is a defect that the thickness of the local steel bar protective layer is insufficient, which affects the durability of the structure. Utility Model Content

[0005] The purpose of the utility model is to overcome the problems of instability and collapse of large-span arched steel skeletons in existing tunnel open holes, and to provide a tunnel open hole lining steel skeleton reinforcement structure that can effectively lift and position the large-section flat tunnel open hole lining steel skeleton to prevent its deformation and overturning and ensure the thickness of the steel protection layer.

[0006] The utility model adopts a technical solution to solve the technical problem: a tunnel open hole lining steel frame reinforcement structure, including a scaffolding and a lining steel frame, a plurality of columns are arranged between the scaffolding and the ground, the scaffolding is located directly above the lining steel frame, a plurality of suspension rods are arranged between the scaffolding and the lining steel frame, the two ends of the suspension rods are respectively fixed on the longitudinal main bars of the scaffolding and the lining steel frame, and the suspension rods suspend and pull the lining steel frame.

[0007] Optionally, the scaffolding is composed of a plurality of trusses, and a plurality of connecting rods I are provided between the trusses.

[0008] Optionally, the scaffolding is fixedly connected to the tunnel side slope, a plurality of connecting rods II are provided between the columns, a plurality of connecting rods III are provided between the columns and the slope or the ground, and triangular armpit supports are provided between the columns and the scaffolding.

[0009] Optionally, the lateral spacing between the hangers is 1.2-1.6 m, the longitudinal spacing is 2.8-3.2 m, and the minimum spacing between the scaffolding and the lining steel bar skeleton is 1.2-1.5 m.

[0010] The use and principle of the utility model are as follows: when in use, a scaffold is first erected, and the scaffold is effectively connected to the back slope of the tunnel side, then a lining steel frame is erected under the scaffold, and in the process of erecting the lining steel frame, the longitudinal main reinforcement of the lining steel frame is connected to the scaffold through the suspension rod, after the lining steel frame is erected, a trolley is used as an inner mold, an outer mold is installed on the outer surface of the lining steel frame, concrete is poured into the lining steel frame through the trolley, and after the concrete is solidified, the inner and outer templates are removed, then the suspension rod is cut off, the concrete surface is polished, and anti-rust treatment is performed, and finally the scaffold is removed;

[0011] The principle of the utility model is to construct a support system by using a scaffolding and columns, and connect the lining steel frame with the scaffolding through a hanger, so that the force exerted on the lining steel frame is borne by the scaffolding. Since the scaffolding and the columns constitute a stable support system, the stability of the lining steel frame can be effectively improved. In addition, the hanger of the scaffolding is fixedly connected to the longitudinal main reinforcement of the lining steel frame, and the longitudinal main reinforcement of the lining steel frame can be suspended and positioned to prevent it from being flexibly deformed downward. Since the annular main reinforcement of the masonry steel frame is connected to the longitudinal main reinforcement through the tie reinforcement and the limit reinforcement, the annular main reinforcement can also be prevented from being flexibly deformed downward, thereby ensuring the thickness of the reinforcement protective layer.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects: the utility model can effectively lift and position the steel bar skeleton of the open hole lining of a large-section flat tunnel, prevent its deformation and overturning, and ensure the thickness of the steel bar protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front structural schematic diagram of the utility model;

[0014] Figure 2 This is a side view of the structure of the utility model;

[0015] The components described in the accompanying drawings are marked as follows: scaffolding 1, lining steel frame 2, column 3, hanger 4, truss 11, connecting rod I 12, connecting rod II 5, connecting rod III 6, triangular armpit support 7. DETAILED DESCRIPTION

[0016] Embodiment 1, below combines Figure 1 and Figure 2To further illustrate the utility model, a tunnel open hole lining steel frame reinforcement structure comprises a scaffolding 1 and a lining steel frame 2, a plurality of columns 3 are arranged between the scaffolding and the ground, the columns are made of steel pipes, the columns are perpendicular to the ground, one end of the columns is fixed to the scaffolding through a connecting piece, and the other end is in contact with the ground, the scaffolding is located directly above the lining steel frame, the minimum spacing between the scaffolding and the lining steel frame is 1.2-1.5m, a plurality of hangers 4 are arranged between the scaffolding and the lining steel frame, the hangers are made of steel bars, the lateral spacing between the hangers is 1.2-1.6m, the longitudinal spacing is 2.8-3.2m, the hangers are perpendicular to the ground, the two ends of the hangers are respectively welded to the longitudinal main bars of the scaffolding and the lining steel frame, and the hangers hang and pull the lining steel frame.

[0017] In order to facilitate the installation and removal of the scaffolding, the scaffolding is composed of multiple trusses 11. The trusses are parallel chord trusses. The trusses are parallel to each other. Multiple connecting rods Ⅰ12 are arranged between the trusses. The connecting rods Ⅰ are steel pipes and are fixedly connected to the trusses through connectors.

[0018] In order to improve the structural stability, the scaffolding is fixedly connected to the tunnel side slope by connecting rods, and multiple connecting rods Ⅱ5 are arranged between the columns. The connecting rods Ⅱ fixedly connect the multiple columns to form a whole. Multiple connecting rods Ⅲ6 are arranged between the columns and the slope or the ground. The connecting rods Ⅲ support the columns. The connecting rods Ⅱ and Ⅲ are made of steel pipes. Triangular armpit supports 7 are arranged between the columns and the scaffolding to support the scaffolding.

[0019] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel open hole lining steel frame reinforcement structure, comprising a scaffold (1) and a lining steel frame (2), characterized in that: A plurality of columns (3) are arranged between the scaffolding and the ground; the scaffolding is located directly above the lining steel frame; a plurality of suspension rods (4) are arranged between the scaffolding and the lining steel frame; the suspension rods suspend and pull the lining steel frame.

2. The tunnel open hole lining steel skeleton reinforcement structure according to claim 1 is characterized by: The scaffolding is composed of a plurality of trusses (11), and a plurality of connecting rods I (12) are arranged between the trusses.

3. The tunnel open hole lining steel skeleton reinforcement structure according to claim 1 is characterized by: The scaffold is fixedly connected to the tunnel side slope, a plurality of connecting rods II (5) are arranged between the columns, a plurality of connecting rods III (6) are arranged between the columns and the slope or the ground, and triangular armpit supports (7) are arranged between the columns and the scaffold.

4. The tunnel open hole lining steel skeleton reinforcement structure according to claim 1 is characterized by: The horizontal spacing between the hangers is 1.2-1.6m, the longitudinal spacing is 2.8-3.2m, and the minimum spacing between the scaffolding and the lining steel frame is 1.2-1.5m.

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