Steel plate reinforcing structure at shield tunnel lining seam

Abstract

The utility model discloses a steel plate reinforcing structure at a shield tunnel lining seam, belongs to the technical field of geotechnical engineering construction, and aims to solve the technical problems of insufficient rigidity and poor sealing performance of a shield tunnel lining seam area in the prior art. The device comprises a reinforcing steel plate, and the reinforcing steel plate is attached to the inner wall of a shield tunnel lining segment and fixed through a plurality of limiting pieces; the reinforcing steel plate comprises a plurality of spliced reinforcing units, connecting parts are formed at the ends of the reinforcing units, and the adjacent reinforcing units are fixedly spliced through the connecting parts. According to the steel plate reinforcing structure at the shield tunnel lining seam, through the modular design and the dynamic adjusting technology, the bearing capacity and the sealing performance of the seam can be improved, and meanwhile efficient installation and long-term dynamic adaptation are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a geotechnical engineering construction technical field, concretely relates to a steel plate reinforcing structure at shield tunnel lining joint. BACKGROUND

[0002] As an important structural form of urban rail transit construction, the lining structure of shield tunnel is directly related to the stability and service life of the tunnel. Due to the complexity of the geological conditions of the tunnel and the influence of external loads, the joints between the segments often become the weak link of the entire tunnel lining structure.

[0003] The existing shield tunnel lining segment joint problem mainly shows joint deformation: due to the influence of uneven settlement, geological stress change and other factors during the service of the shield tunnel, the segment joint is prone to displacement and cracking, thereby reducing the structural stiffness; leakage risk: when the sealing performance of the joint is poor or the sealing fails due to deformation, groundwater is easy to seep into the tunnel, which not only affects the durability of the tunnel structure, but also may threaten the normal operation of the tunnel.

[0004] In recent years, the research on tunnel lining structure has gradually focused on the reinforcement of the joint area, but the existing technology still has deficiencies, such as limited measures for increasing the stiffness of the joint, which cannot effectively resist long-term external force. In the joint reinforcement process, it is mostly dependent on site pouring of concrete or grouting process, which has long construction time and is limited by geological conditions. The traditional reinforcement method lacks dynamic adjustment ability and cannot adapt to the long-term deformation of the tunnel due to environmental changes during use. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a steel plate reinforcing structure at shield tunnel lining joint to solve the technical problems of insufficient stiffness and poor sealing of the joint area of the shield tunnel lining in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a steel plate reinforcing structure at shield tunnel lining joint, which comprises a reinforcing steel plate, the reinforcing steel plate is attached to the inner wall of the shield tunnel lining segment, and is fixed through a plurality of limiting pieces.

[0008] The reinforcing steel plate comprises a plurality of reinforcing units that are spliced, the end of the reinforcing unit is formed with a connecting part, and the adjacent reinforcing units are fixed and spliced through the connecting part.

[0009] Optionally or preferably, the connecting part comprises a horizontal end face, a sawtooth end face, a comb-tooth end face and a wave-shaped end face.

[0010] Optionally or preferably, the limiting member is an L-shaped fixing member having opposite long and short arms.

[0011] The limiting member is fixedly connected with the shield tunnel lining segment through the short arm, and the limiting member fixes the reinforcing steel plate at the joint of the shield tunnel lining segment through the long arm.

[0012] Optionally or preferably, a sealing member is filled between the reinforcing units and between the reinforcing steel plate and the shield tunnel lining segment.

[0013] Optionally or preferably, a fixing bolt is arranged on the long arm of the limiting member, and the fixing bolt is used for fixing the reinforcing steel plate.

[0014] Based on the above technical solution, the shield tunnel lining joint steel plate reinforcing structure can at least produce the following technical effects:

[0015] The shield tunnel lining joint steel plate reinforcing structure can improve the strength of the lining segment joint, avoid deformation and cracking of the joint, and improve the construction efficiency.

[0016] The reinforcing structure comprises a plurality of assembled reinforcing units, facilitating transportation and construction, and without the need for complex welding process or long construction period, thereby greatly improving the construction efficiency.

[0017] In addition, the reinforcing steel plate and the sealing member can be conveniently disassembled and replaced by disassembling the limiting member, thereby reducing the subsequent maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic diagram of the overall structure of the shield tunnel lining joint steel plate reinforcing structure of the utility model;

[0019] Fig. 2 is a schematic diagram of the connection relationship between the reinforcing steel plate and the limiting member in the shield tunnel lining joint steel plate reinforcing structure of the utility model;

[0020] Fig. 3 is a schematic diagram of the structure of the limiting member in the shield tunnel lining joint steel plate reinforcing structure of the utility model.

[0021] In the drawing: 1, shield tunnel lining segment; 2, reinforcing steel plate; 21, reinforcing unit; 3, limiting member; 4, fixing bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by the ordinary skilled in the art based on the embodiments in the utility model without creative labor belong to the range of the utility model protection.

[0023] Embodiment

[0024] Please refer to Figs. 1 to 3 A steel plate reinforcing structure at the joint of a shield tunnel lining, comprising a plurality of reinforcing steel plates 2 matched with the curvature of the inner side wall of the shield tunnel lining segment 1, the reinforcing steel plates 2 are attached to the inner wall of the shield tunnel lining segment 1 and fixed by limiting pieces 3, it should be noted that, in order to ensure that the arc-shaped reinforcing steel plates 2 are closely attached to the joint, an adjusting tool is needed to correct the initial position of the reinforcing steel plates during installation.

[0025] In order to facilitate transportation and construction, in the embodiment, the reinforcing steel plate 2 comprises a plurality of spliced reinforcing units 21, and each reinforcing steel plate 2 is composed of 5-6 reinforcing units 21.

[0026] In order to improve the splicing connection strength between the reinforcing units 21, in the embodiment, the end of each reinforcing unit 21 is formed with a connecting part, and the adjacent reinforcing units 21 are connected through the connecting part.

[0027] Specifically, in the embodiment, the reinforcing steel plate 2 comprises a first reinforcing unit 21, a plurality of intermediate reinforcing units 21 and a terminal reinforcing unit 21 arranged in sequence; wherein the two ends of the first reinforcing unit 21 are a horizontal end surface connecting part and a wave-shaped connecting part respectively, the two ends of the intermediate reinforcing unit 21 are both wave-shaped connecting parts, and the two ends of the terminal reinforcing unit 21 are a horizontal end surface connecting part and a wave-shaped connecting part respectively.

[0028] In the embodiment, the limiting piece 3 is an L-shaped fixing piece, which has opposite long and short arms, the short arm of the limiting piece 3 is fixedly connected with the shield tunnel lining segment 1, and the long arm 2 of the limiting piece 3 fixes the reinforcing steel plate 2 to the shield tunnel lining segment 1 through a fixing bolt 4, in actual work, the fixing bolt 4 is arranged in the lining segment hoisting hole.

[0029] In order to ensure the stability of the reinforcing structure, in the embodiment, the limiting pieces 3 and the fixing bolts 4 are arranged at equal intervals on both sides of the reinforcing steel plate 2.

[0030] In order to ensure the waterproof performance of the joint, in the embodiment, a sealing piece is filled between the plurality of reinforcing units 21 and between the reinforcing steel plate 2 and the shield tunnel lining segment 1.

[0031] Specifically, the seal arranged between the plurality of reinforcing units 21 is a ring-shaped sealing strip; and the seal arranged between the reinforcing steel plate 2 and the shield tunnel lining segment 1 is a high-elasticity rubber sealing gasket.

[0032] The shield tunnel lining joint steel plate reinforcing structure provided by the embodiment has the following specific construction method:

[0033] S1, pre-buried bolts are arranged on both sides of the shield tunnel lining segment 1 joint, and the bolt spacing is uniform to ensure uniform stress distribution of the reinforcing assembly; and the position of the pre-buried bolt is matched with the fixing hole of the reinforcing steel plate 2 to provide accurate positioning for subsequent installation.

[0034] S2, the reinforcing unit 21 is hoisted to the shield tunnel lining segment 1 joint by using a hoisting device, and is sequentially fixed and assembled by the limiting piece 3 to form a complete reinforcing steel plate 2, so that the curvature of the reinforcing steel plate 2 is matched with the curvature of the tunnel joint; and the position of the reinforcing steel plate 2 is adjusted to ensure that the reinforcing steel plate 2 is closely attached to the joint.

[0035] S3, a high-elasticity rubber sealing gasket is installed on the contact surface between the reinforcing steel plate 2 and the shield tunnel lining segment 1 to fill the joint gap; and a ring-shaped sealing strip is additionally arranged at the joint part of the reinforcing steel plate 2 to realize overall sealing performance through butt joint design.

[0036] S4, the pre-buried bolt holes of the reinforcing steel plate 2, the limiting piece 3 and the tunnel lining segment 1 are fastened by using the expansion bolts; and the fastening degree of the expansion bolts 4 is adjusted to ensure that the reinforcing steel plate is uniformly stressed and stably fixed.

[0037] S5, a plurality of reinforcing steel plates 2 are connected in abutment to form an inner lining steel ring.

[0038] The shield tunnel lining joint steel plate reinforcing structure provided by the embodiment can improve the joint bearing capacity and sealing performance, realize efficient installation and long-term dynamic adaptation, and is suitable for shield tunnel joint reinforcement under various complex geological conditions through modular design and dynamic adjustment technology.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A steel plate reinforcing structure for a shield tunnel lining joint, characterized by, The reinforced steel plate (2) is attached to the inner wall of the shield tunnel lining segment (1) and is fixed by a plurality of limiting members (3); The reinforced steel plate (2) comprises a plurality of reinforced units (21) which are spliced together, and the end of each reinforced unit (21) is provided with a connecting part, and the adjacent reinforced units (21) are fixed and spliced by the connecting parts; The limiting member (3) is an L-shaped fixing member having opposite long and short arms; The limiting member (3) is fixedly connected to the shield tunnel lining segment (1) by the short arm, and the limiting member (3) fixes the reinforced steel plate (2) at the joint of the shield tunnel lining segment (1) by the long arm.

2. The steel plate reinforcing structure for a joint of a shield tunnel lining according to claim 1, characterized in that, The connecting part comprises a horizontal end face, a sawtooth end face, a comb-shaped end face and a wave-shaped end face.

3. The steel plate reinforcement structure for a joint of a tunnel lining according to claim 2, characterized in that, A plurality of sealing members are filled between the reinforced units (21) and between the reinforced steel plate (2) and the shield tunnel lining segment (1).

4. The steel plate reinforcing structure for a joint of a tunnel lining according to claim 1, characterized in that, A fixing bolt (4) is arranged on the long arm of the limiting member (3), and the fixing bolt (4) is used for fixing the reinforced steel plate (2).

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