A method for repairing and reinforcing a segment of a shield

Abstract

The application discloses a shield segment repairing and reinforcing method, and the shield segment comprises a shield segment body, and the reinforcing method of the shield segment body comprises the following steps: S1, chiseling off loose surfaces and loose particles at a damaged position of the shield segment body, and cleaning the damaged area; S2, implanting a plurality of radial reinforcing bars which are uniformly distributed relative to an axis of the shield segment body on structural steel bars at the damaged position of the shield segment body, then arranging an inner reinforcing mesh on one side of the radial reinforcing bars close to the axis of the shield segment body, smearing concrete mortar on both sides of the inner reinforcing mesh, arranging an outer reinforcing mesh on one side of the radial reinforcing bars away from the shield segment body, and then smearing concrete mortar on one side of the outer reinforcing mesh away from the axis of the shield segment body. In the application, the radial reinforcing bars have a small length, and a plurality of radial reinforcing bars are arranged, so that the radial reinforcing bars can be well applied to damaged diameters with different diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield segment, in particular to a shield segment repairing and reinforcing method. BACKGROUND

[0002] The shield segment is a main assembly component of shield construction, is the innermost layer of the tunnel, and bears the role of resisting the earth pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of the shield method tunnel, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel and influences the waterproof performance and durability of the tunnel.

[0003] For the treatment of the broken and damaged shield segment, the conventional treatment sequence is: chiseling the loose particles on the damaged surface, cleaning the dust, planting the steel bars, laying the mesh, using the mixed polymer slurry for grouting repair, and maintenance. The shield segment is a compression bending force component, and the steel bars and the concrete bear the bending moment and shear force together. After the original structure concrete of the damaged part is stripped, although the polymer slurry is used for filling and smoothing as a reinforcing measure, the diameters of the damaged parts of the shield segment are different, and the existing repair method is difficult to perform the steel bar planting operation on the damaged parts with different diameters, and it is difficult to enhance the structural strength of the repaired part of the shield segment. SUMMARY

[0004] In order to solve the problem that the existing repair method is difficult to perform the steel bar planting operation on the damaged parts with different diameters and difficult to enhance the structural strength of the repaired part of the shield segment, the present application provides a shield segment repairing and reinforcing method.

[0005] The above technical purpose of the present application is realized by the following technical scheme:

[0006] A shield segment repairing and reinforcing method, the shield segment comprises a shield segment body, and the reinforcing method of the shield segment body comprises the following steps:

[0007] S1, chiseling the loose surface and loose particles of the damaged part of the shield segment body and cleaning the damaged area;

[0008] S2, planting a plurality of radial reinforcing bars uniformly distributed about the axis of the shield segment body on the structural steel bars of the damaged part of the shield segment body, then setting an inner reinforcing mesh on the side of the radial reinforcing bars close to the axis of the shield segment body, and smearing the concrete mortar on both sides of the inner reinforcing mesh, setting an outer reinforcing mesh on the side of the radial reinforcing bars away from the shield segment body, and then smearing the concrete mortar on the side of the outer reinforcing mesh away from the axis of the shield segment body.

[0009] By adopting the technical scheme, the radial reinforcing rib, the inner reinforcing mesh and the outer reinforcing mesh play a good structural supporting role for the newly applied concrete mortar, and the structural strength and the compression resistance of the repaired shield pipe body are enhanced.

[0010] Further, the extension direction of the radial reinforcing rib is in an arc shape, a first arc-shaped clamping plate is fixed to the surface of the radial reinforcing rib close to the axis of the shield pipe body, a second arc-shaped clamping plate coaxial with the first arc-shaped clamping plate is arranged on the radial reinforcing rib, an arc-shaped groove for accommodating the second arc-shaped clamping plate is arranged in the radial reinforcing rib, the second arc-shaped clamping plate cooperates with the first arc-shaped clamping plate and holds the structural steel bar, and a resisting spring is arranged in the arc-shaped groove, one end of the resisting spring is fixed to the inner wall of the arc-shaped groove, and the other end of the resisting spring is fixed to the second arc-shaped clamping plate.

[0011] By adopting the technical scheme, when the radial reinforcing rib is installed, the second arc-shaped clamping plate is forced and the resisting spring is compressed, the second arc-shaped clamping plate is gradually contracted into the arc-shaped groove, so as to install the radial reinforcing rib on the structural steel bar, under the action of the resisting spring, the first arc-shaped clamping plate cooperates with the second arc-shaped clamping plate and holds the structural steel bar, then the inner reinforcing mesh is arranged on the side of the radial reinforcing rib close to the axis of the shield pipe body, and the radial reinforcing rib, the inner reinforcing mesh, the outer reinforcing mesh and the solidified concrete mortar cooperate after the concrete mortar is applied on both sides of the inner reinforcing mesh, so as to improve the structural strength and the compression resistance of the repaired shield pipe body.

[0012] Further, the number of the radial reinforcing ribs is equal to the number of the structural steel bars, the adjacent radial reinforcing ribs are connected through a reinforcing assembly, and the reinforcing assembly comprises a connecting ring fixed to the inner surface of the structural steel bar and a connecting shaft inserted and matched with the connecting ring.

[0013] By adopting the technical scheme, the connecting ring and the connecting shaft are inserted and matched, so that the adjacent two radial reinforcing ribs are connected, and the stability of the radial reinforcing ribs connected with each other during use is enhanced.

[0014] Further, the outer wall of the radial reinforcing rib is provided with a first installation groove and a second installation groove in communication with each other, a connecting assembly for connecting the radial reinforcing rib and the inner reinforcing mesh is jointly installed in the first installation groove and the second installation groove, the connecting assembly comprises a rotating shaft rotatably installed on the inner wall of the first installation groove, a gear fixedly sleeved on the rotating shaft and a steel wire wound and fixed on the rotating shaft, and the steel wire penetrates through the second installation groove and the inner reinforcing mesh and is knotted.

[0015] Through the above technical scheme, the steel wire passes through the second installation groove and the inner reinforcing mesh and is knotted, thereby enhancing the stability of the connection between the inner reinforcing mesh and the radial reinforcing rib.

[0016] Further, the rotating shaft side wall is provided with an accommodating groove for accommodating the steel wire.

[0017] Through the above technical scheme, the stability of the steel wire winding on the rotating shaft is enhanced.

[0018] Further, the steel wire passes through the second installation groove and the inner reinforcing mesh back and forth, and then passes through the second installation groove and the outer reinforcing mesh and is knotted.

[0019] Further, the rotating shaft, the gear and the steel wire are all provided with two, the two gears are engaged with each other, and the free ends of the two steel wires are knotted with each other.

[0020] Through the above technical scheme, the connection between the radial reinforcing rib and the inner reinforcing mesh and the outer reinforcing mesh is more firm, and the structural strength after the damaged part of the shield pipe body is repaired is improved.

[0021] In summary, the present application has the following beneficial effects:

[0022] 1. In the present application, the radial reinforcing rib, the inner reinforcing mesh and the outer reinforcing mesh play a good structural support role for the newly applied concrete mortar, and enhance the structural strength and compression resistance after the damaged part of the shield pipe body is repaired. The length of the radial reinforcing rib is small, and multiple radial reinforcing ribs can be well applied to damaged diameters of different diameters.

[0023] 2. In the present application, when the radial reinforcing rib is installed, the second arc-shaped clamp plate is forced and the resisting spring is compressed, the second arc-shaped clamp plate is gradually contracted into the arc-shaped groove, so as to install the radial reinforcing rib on the structural steel bar. Under the action of the resisting spring, the first arc-shaped clamp plate cooperates with the second arc-shaped clamp plate and holds the structural steel bar, then the inner reinforcing mesh is arranged on the side of the radial reinforcing rib close to the axis of the shield pipe body, and after the concrete mortar is applied on both sides of the inner reinforcing mesh, the radial reinforcing rib, the inner reinforcing mesh, the outer reinforcing mesh and the solidified concrete mortar cooperate to improve the structural strength and compression resistance after the damaged part of the shield pipe body is repaired. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a whole structure schematic view of the embodiment of the present application;

[0025] Figure 2 is Figure 1 is a structure schematic view after the outer reinforcing mesh is removed;

[0026] Figure 3This is a cross-sectional view used to highlight the connecting components in an embodiment of the present invention;

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the radial stiffener in an embodiment of the present invention.

[0029] In the picture:

[0030] 1. Shield tunnel body; 11. Structural steel reinforcement; 2. Radial reinforcing rib; 21. First arc-shaped clamp; 22. Second arc-shaped clamp; 23. Arc-shaped groove; 24. First mounting groove; 25. Second mounting groove; 3. Inner reinforcing mesh; 4. Outer reinforcing mesh; 5. Anti-collision spring; 6. Reinforcing component; 61. Connecting ring; 62. Connecting shaft; 621. Receiving groove; 7. Connecting component; 71. Rotating shaft; 72. Gear; 73. Steel wire. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] This application discloses a method for repairing and reinforcing tunnel segments.

[0033] like Figures 1 to 5 As shown, the method for repairing and reinforcing tunnel segments includes a shield tunnel body 1. The reinforcement method for the shield tunnel body 1 includes the following steps:

[0034] S1. Remove the loose surface and loose particles from the damaged area of ​​the shield tunnel body 1, and clean the damaged area.

[0035] S2. Multiple radial reinforcing bars 2 are evenly distributed around the axis of the shield tube body 1 on the structural steel bars 11 at the damaged part of the shield tube body 1. Then, an inner reinforcing mesh 3 is set on the side of the radial reinforcing bar 2 close to the axis of the shield tube body 1. Concrete mortar is applied to both sides of the inner reinforcing mesh 3. An outer reinforcing mesh 4 is set on the side of the radial reinforcing bar 2 away from the shield tube body 1. Then, concrete mortar is also applied to the side of the outer reinforcing mesh 4 away from the axis of the shield tube body 1.

[0036] In the embodiment, the extending direction of the radial reinforcing rib 2 is in the shape of a circular arc, the radial reinforcing rib 2 is provided with a first arc-shaped clamping plate 21 and a second arc-shaped clamping plate 22, the extending direction of the first arc-shaped clamping plate 21 is also in the shape of a circular arc, one end of the first arc-shaped clamping plate 21 is fixed to the surface of the radial reinforcing rib 2 close to the axis of the shield pipe body 1, the second arc-shaped clamping plate 22 is coaxially arranged with the first arc-shaped clamping plate 21, an arc-shaped groove 23 is arranged in the radial reinforcing rib 2 for accommodating the second arc-shaped clamping plate 22, the second arc-shaped clamping plate 22 is matched with the first arc-shaped clamping plate 21 and holds the structural steel bar 11, the arc-shaped groove 23 is provided with a contact spring 5, one end of the contact spring 5 is fixed to the inner wall of the arc-shaped groove 23, the other end of the contact spring 5 is fixed to the second arc-shaped clamping plate 22.

[0037] The number of the radial reinforcing ribs 2 is equal to the number of the structural steel bars 11 and the positions are one-to-one corresponding, the adjacent radial reinforcing ribs 2 are connected through the reinforcing assembly 6, the reinforcing assembly 6 includes a connecting ring 61 and a connecting shaft 62, one side of the connecting ring 61 is fixed to the inner surface of the structural steel bar 11, the connecting ring 61 is located at the position of the inner surface of the structural steel bar 11 close to one end of the structural steel bar 11, the connecting shaft 62 is fixed to the position of the inner surface of the structural steel bar 11 close to the other end of the structural steel bar 11, and the connecting shaft 62 is insertedly matched with the connecting ring 61.

[0038] The outer wall of the radial reinforcing rib 2 is provided with a first installation groove 24 and a second installation groove 25 which are communicated with each other, the connecting assembly 7 is jointly installed in the first installation groove 24 and the second installation groove 25, for connecting the radial reinforcing rib 2 and the inner reinforcing mesh 3, the connecting assembly 7 includes a rotating shaft 71, a gear 72 and a steel wire 73, the axis of the rotating shaft 71 is parallel to the axis of the structural steel bar 11, the rotating shaft 71 is rotationally connected with the inner wall of the first installation groove 24, the axis of the gear 72 is coincided with the axis of the rotating shaft 71, the gear 72 is sleeved on the rotating shaft 71 and is fixed to the rotating shaft 71, the steel wire 73 is wound and fixed on the rotating shaft 71, the side wall of the rotating shaft 71 is provided with an accommodating groove 621 for accommodating the steel wire 73, the steel wire 73 passes through the second installation groove 25, the inner reinforcing mesh 3, then goes back and forth, and then passes through the second installation groove 25 and the outer reinforcing mesh 4 and is knotted. In the embodiment, the rotating shaft 71, the gear 72 and the steel wire 73 are all provided with two, the two gears 72 are meshed with each other, and the free ends of the two steel wires 73 are knotted with each other.

[0039] The use principle of the shield segment repairing and reinforcing method in the embodiment is as follows:

[0040] When the radial reinforcing rib 2 is installed, the second arc-shaped clamping plate 22 is forced and the abutting spring 5 is compressed, the second arc-shaped clamping plate 22 is gradually contracted into the arc-shaped groove 23, so as to install the radial reinforcing rib 2 on the structural steel bar 11, under the action of the abutting spring 5, the first arc-shaped clamping plate 21 cooperates with the second arc-shaped clamping plate 22 and holds the structural steel bar 11, then the inner reinforcing mesh 3 is arranged on the side of the radial reinforcing rib 2 close to the axis of the shield pipe body 1, after the inner reinforcing mesh 3 is coated with the concrete mortar on both sides, the radial reinforcing rib 2, the inner reinforcing mesh 3, the outer reinforcing mesh 4 and the solidified concrete mortar cooperate, so as to improve the structural strength and the compression resistance of the shield pipe body 1 after the damaged part is repaired.

[0041] The above only describes the preferred embodiments of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme belonging to the idea of the present application is within the protection scope of the present application. It should be pointed out that, for the ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A method for repairing and reinforcing shield tunnel segments, wherein the shield tunnel segment includes a shield tunnel body (1), characterized in that, The reinforcement method for the shield tunnel body (1) includes the following steps: S1. Remove the loose surface and loose particles from the damaged area of ​​the shield tunnel body (1) and clean the damaged area. S2. Multiple radial reinforcing bars (2) evenly distributed around the axis of the shield tube body (1) are implanted on the structural steel bars (11) at the damaged part of the shield tube body (1). Then, an inner reinforcing mesh (3) is set on the side of the radial reinforcing bar (2) close to the axis of the shield tube body (1). Concrete mortar is applied to both sides of the inner reinforcing mesh (3). An outer reinforcing mesh (4) is set on the side of the radial reinforcing bar (2) away from the shield tube body (1). Then, concrete mortar is also applied to the side of the outer reinforcing mesh (4) away from the axis of the shield tube body (1). The radial reinforcing rib (2) extends in an arc shape. A first arc-shaped clamping plate (21) is fixed on the surface of the radial reinforcing rib (2) on the side close to the axis of the shield tube body (1). A second arc-shaped clamping plate (22) is provided on the radial reinforcing rib (2) and is coaxially arranged with the first arc-shaped clamping plate (21). An arc-shaped groove (23) for accommodating the second arc-shaped clamping plate (22) is provided in the radial reinforcing rib (2). The second arc-shaped clamping plate (22) cooperates with the first arc-shaped clamping plate (21) and holds the structural steel bar (11). An anti-spring (5) is provided in the arc-shaped groove (23). One end of the anti-spring (5) is fixed to the inner wall of the arc-shaped groove (23), and the other end of the anti-spring (5) is fixed to the second arc-shaped clamping plate (22). The number of radial reinforcing ribs (2) is equal to the number of structural steel bars (11). Adjacent radial reinforcing ribs (2) are connected by a reinforcing assembly (6). The reinforcing assembly (6) includes a connecting ring (61) fixed to the inner surface of the structural steel bar (11) and a connecting shaft (62) that is inserted into the connecting ring (61).

2. The method for repairing and reinforcing tunnel segments according to claim 1, characterized in that, The outer wall of the radial reinforcing rib (2) is provided with a first mounting groove (24) and a second mounting groove (25) that are interconnected. The first mounting groove (24) and the second mounting groove (25) are jointly equipped with a connecting component (7) for connecting the radial reinforcing rib (2) and the inner reinforcing mesh (3). The connecting component (7) includes a rotating shaft (71) rotatably mounted on the inner wall of the first mounting groove (24), a gear (72) fixedly sleeved on the rotating shaft (71), and a steel wire (73) wound and fixed on the rotating shaft (71). The steel wire (73) passes through the second mounting groove (25) and the inner reinforcing mesh (3) and is knotted.

3. The method for repairing and reinforcing tunnel segments according to claim 2, characterized in that, The rotating shaft (71) has a receiving groove (621) on its side wall for accommodating the steel wire (73).

4. The method for repairing and reinforcing tunnel segments according to claim 3, characterized in that, The steel wire (73) passes through the second mounting groove (25) and the inner reinforcing mesh (3) and then passes back and forth, and then passes through the second mounting groove (25) and the outer reinforcing mesh (4) and is knotted.

5. A method for repairing and reinforcing tunnel lining segments according to claim 4, characterized in that, The rotating shaft (71), gear (72) and steel wire (73) are each provided in twos, the two gears (72) mesh with each other, and the free ends of the two steel wires (73) are knotted together.

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