CN209637770U - A subway shield segment - Google Patents

Abstract

A subway shield segment, which is composed of inner corrugated steel plate and outer corrugated steel plate connected by connecting bolts as a skeleton and made of high-strength concrete. There are studs; there are "L" splicing grooves at both axial ends of the sheet body; rubber butt joint plates are adhered to the radial ends of the sheet body, and there are two installations connecting adjacent sheets at both radial ends of the sheet body. Bolt slots and arc bolt holes for the arc connecting bolts of the body. The advantage of the shield piece is that it does not need to manually bind the reinforcement cage, which is easy to manufacture and convenient for factory production; the corrugated steel plate has good mechanical properties, which can effectively disperse the stress concentration of the load, so that the shield segment is not easy to be damaged; the corrugated steel plate skeleton The gap is large, and the concrete is easy to be tamped when pouring; the splicing and tongue-and-groove butt joint is adopted between the shield pipe ring and the ring, and the sealing waterproof material is added to the joint, which can improve the overall strength and waterproof performance of the subway shield pipe.

Description

A subway shield segment

technical field

The utility model relates to subway tunnel construction, in particular to a subway shield segment.

Background technique

At present, shield tunnels are generally used in subway tunnel construction. The shield segment is the main assembly component of shield tunnel construction, and is the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The shield segment is the permanent lining structure of the shield tunnel, which is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel.

The current subway tunnel is formed by butt joints of shield segments made of arc-shaped sheet-shaped reinforced concrete. The joints between the shield segments and between the rings are through-jointed, and the joints are sealed and waterproofed with sealing strips. The disadvantages of this kind of shield segment are: ① the steel cage is used as the skeleton, the structure is complex, and the binding of the steel cage is labor-intensive and time-consuming, which is not conducive to the mass production of the factory; ② limited by human factors, the position of the steel cage in the concrete is not easy to place Accurate, resulting in uneven stress and strain when the prefabricated shield segment distributes loads in the axial and radial directions at the same time, the shield segment is easily damaged; ③Concrete is not easy to vibrate and compact during the prefabrication process, which affects the shield segment The strength; ④ The shield pipe ring and the ring are connected at the same head, and the sealing and waterproof performance is not easy to maintain for a long time.

Utility model content

In order to overcome the above-mentioned defects of the existing subway shield segment, the utility model provides a subway shield segment with simple structure, high strength, high prefabrication efficiency, and durable sealing and waterproof performance.

In order to achieve the above purpose, the subway shield segment provided by the utility model is composed of an arc-shaped sheet body made of high-strength concrete poured by the inner corrugated steel plate and the outer corrugated steel plate whose wave peaks are fixedly connected by connecting bolts; the inner corrugated steel plate and There are studs on both sides of the trough of the outer corrugated steel plate; there are "L" splicing grooves at both ends of the sheet body in the axial direction; rubber butt joint plates are attached to the radial ends of the sheet body, There are two bolt slots and arc bolt holes for installing arc bolts connecting adjacent sheets.

Compared with the existing subway shield segments, the utility model has the following advantages:

1. The subway shield segment of the utility model has a simple structure, and the factory-processed corrugated steel plate is used as the concrete skeleton, which can save the manual binding of steel cages, and is easy to manufacture and convenient for factory production.

2. The corrugated steel plate has axial corrugations and good mechanical characteristics. When the stress and strain caused by the load are distributed in the axial and radial directions at the same time, it can effectively disperse the stress concentration of the load and make the shield segments less likely to be damaged.

3. Use corrugated steel plates and welded studs to replace the existing steel cage framework. Because the corrugated steel plate framework has large gaps, it is easy to be compacted during concrete pouring, which is conducive to improving the overall strength of the shield tube.

4. The shield tube rings formed by the splicing of shield pieces adopt "L" splicing splicing and tongue-and-groove butt joints, and sealing and waterproof materials are added at the joints, which can improve the overall strength and waterproof performance of the subway shield tubes.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the utility model shield segment;

Figure 2a is a schematic diagram of the cross-section along the connecting bolts of the shield segments;

Figure 2b is a schematic diagram of the section along the shield segment pegs;

Fig. 3 is a three-dimensional schematic diagram of a corrugated steel plate in a shield segment;

Figure 4 is a schematic diagram of the radial interconnection of shield segments;

Fig. 5 is a three-dimensional schematic diagram of a ring in a shield tube composed of shield segments in Fig. 1 .

Explanation of symbols in the figure: 1. Stud, 2. Inner corrugated steel plate, 3. Sheet body, 4. Bolt hole, 5. Bolt groove, 6. Rubber butt plate, 7. Arc bolt, 8. Splicing groove, 9 , Connecting bolts, 10, outer corrugated steel plate, 11, high-strength concrete.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the shape of the subway shield segment of the utility model is an arc-shaped sheet with a radian of 1/5 circle, and the interconnected inner corrugated steel plate 2 and outer corrugated steel plate 10 as shown in Figure 3 are used as skeletons to cast high-strength Concrete 11 is made of arc-shaped sheet 3. The crests of the inner corrugated steel plate and the outer corrugated steel plate are fixedly connected by connecting bolts 9, and studs 1 are respectively welded on both sides of the troughs of the inner corrugated steel plate and the outer corrugated steel plate to better combine the corrugated steel plate with concrete. The two ends are respectively processed into a wave-free flat plate shape. When pouring concrete, use moulds to pour the axial ends of the sheet into the "L"-shaped splicing grooves 8 shown in Figure 1, Figure 2a and Figure 2b; Rubber butt joint plate 6; two bolt grooves 5 are arranged in the radial ends of the sheet body, and arc-shaped bolt holes 4 are provided between the bolt grooves and the rubber butt joint plate.

When constructing the subway shield pipe, five shield segments are first spliced to form a ring of the shield pipe as shown in Figure 5, and finally the fabricated multiple rings are butted back and forth to form the whole shield pipe. When making a ring of the shield tube, apply sealant on the rubber butt joint plates at the radial ends of the adjacent shield segments, and then, as shown in Figure 4, when the adjacent shield segments are spliced, insert the arc bolt 7 Pass through the bolt groove 5 and the arc-shaped bolt hole 4 at the butt joint end of the adjacent shield segments and tighten them, so that the adjacent shield segments can be sealed and fastened to form a ring of the shield tube shown in Figure 5. When a plurality of rings are butted front and back to form a shield tube, sealant is applied to the surfaces of the axially spliced grooves of adjacent shield segments to achieve a sealed connection between the rings.

Claims (1)

1. a kind of metro shield section of jurisdiction, which is characterized in that the interior corrugated steel being fixedly connected by wave crest by connecting bolt (9) (2) arc-shaped sheet body (3) made of high-strength concrete (11) is poured as skeleton and is constituted with outer corrugated steel (10)；Interior corrugated steel (2) and on the trough two sides of outer corrugated steel (10) it is furnished with peg (1)；The axial ends of sheet body has L shape to splice tongue and groove (8)；The radial both ends of sheet body are stained with rubber buttcover plate (6), and there are two installation connection adjacent pellets at the radial both ends of sheet body Bolt slot (5) and arch screw bolt hole (4) used in arch screw bolt (7).