A waterproof shield segment structure is disclosed

Abstract

The utility model relates to shield segment technology field discloses a kind of grouting plugging waterproof shield segment structure, including multiple segments, and multiple segments are used for tunnel lining;Positioning frame, the outer wall of positioning frame is fixedly connected to the side of one of segment;Connecting block, the outer wall of connecting block is fixedly connected to the surface of recess in the side of another segment, and connecting block is slidably connected in the inner wall of positioning frame;Waterstop, waterstop is located between connecting block and positioning frame, and it is used to fill and seal the gap between connecting block and positioning frame, and the inner wall of waterstop side and positioning frame is fixed by adhesive sticking. In the utility model, by setting the cooperation of positioning frame and connecting block, pre-tightening pressure is actively applied to waterstop during segment splicing process, a physical sealing barrier is formed, the reliability of joint initial waterproof is enhanced, and the engagement relationship of positioning frame and connecting block also effectively limits the position of waterstop.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel segment technology, and in particular to a grouting and sealing waterproof shield tunnel segment structure. Background Technology

[0002] Since the beginning of the 21st century, my country's urbanization has accelerated, and the resulting population concentration has exacerbated the imbalance between supply and demand in surface transportation. Three-dimensional transportation projects have become a key focus of urban construction, leading to a peak in tunnel construction. Shield tunneling, due to its advantages of large capacity, high speed, low noise, and low pollution, has become the mainstream method for tunnel construction. However, as tunnels progress into areas with complex hydrogeological conditions, the waterproofing performance of segment joints directly affects the tunnel's use and safety, becoming a key challenge restricting project quality.

[0003] The assembly of tunnel segments relies on manual operation of the assembly machine. A common method for waterproofing the joints is to attach rubber waterstop strips and rubber sheets to the joint surfaces of the segments, which are then secured with connecting bolts. The core principle is to use the bolt pressure to compress and deform the rubber components, filling the gaps and achieving waterproofing. Mechanically, this method relies solely on the clamping and positioning by the assembly machine and the tightening with a bolt wrench; the waterproofing effect depends entirely on the bolt pressure being transferred to the waterstop strip, without any additional pre-tightening or limiting structures.

[0004] Existing waterproofing technologies have significant drawbacks: the precision of the assembly machine, manufacturing errors in the tunnel segments, and human error make it difficult to achieve a perfectly flat and aligned joint between segments, resulting in uneven distribution of bolt pressure. This leads to large differences in compression across different parts of the waterstop strip, causing incomplete sealing in some areas and preventing the formation of a reliable waterproof barrier. Later, under groundwater pressure, this can easily lead to water leakage, or even water and sand inrush, affecting tunnel usability and threatening safety. Therefore, a grouting-sealed waterproof shield tunnel segment structure is proposed to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a grouting and sealing waterproof shield tunnel segment structure, which aims to improve the problem of uneven pressure and poor sealing effect caused by the traditional method of relying solely on bolts to squeeze the waterstop strip, resulting in serious water leakage in the later stage of the tunnel.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A grouting and sealing waterproof shield tunnel segment structure includes: Multiple tunnel segments, wherein the multiple tunnel segments are used for tunnel lining; A positioning frame, the outer wall of which is fixedly connected to one side of one of the segments, is used to provide a reference for rapid alignment and connection between multiple segments; A connecting block, the outer wall of which is fixedly connected to the surface of a groove on one side of another of the tube segments, the connecting block being slidably connected to the inner wall of the positioning frame, the connecting block being used to apply a compressive force to the inner wall of the positioning frame; A waterstop strip is located between the connecting block and the positioning frame, and is used to fill and seal the gap between the connecting block and the positioning frame.

[0007] The above technical solution achieves the effect of guiding the segments to quickly and accurately align through the sliding cooperation between the positioning frame and the connecting block during the segment splicing process. It can also actively apply uniform pre-tightening pressure to the waterstop strip, so that it forms an effective initial waterproof sealing barrier before the bolts are tightened, thereby improving the installation efficiency and the reliability of the initial waterproofing.

[0008] Preferably, one side of the waterstop strip is glued to the inner wall of the positioning frame, and the other side of the waterstop strip is attached to one side of the connecting block.

[0009] The above technical solutions ensure the accurate positioning of the waterstop strip during the installation and docking of the pipe segments, preventing it from falling off, twisting, or shifting, thus providing a guarantee for a stable and reliable sealing effect.

[0010] Preferably, each of the segments has a bolt hole on one side, which provides space for the bolt to be inserted.

[0011] The above technical solution achieves the goal of fastening adjacent segments with bolts to firmly combine multiple segments into a whole tunnel lining ring. This not only provides the conditions for applying the final sealing pressure but also ensures the integrity and stability of the tunnel structure.

[0012] Preferably, grouting holes are provided between the segments on both sides, and the grouting holes on both sides are arc-shaped.

[0013] The above technical solution provides a convenient pre-set channel for subsequent joint grouting and sealing, avoids the risk of damage to the structure due to drilling holes in the segments caused by later leakage, facilitates secondary waterproofing reinforcement, and improves the long-term waterproofing capability of the tunnel lining.

[0014] Preferably, the waterstop strip is located on both sides of the grouting hole, and the grouting holes on both sides can be combined to form a circular hole.

[0015] The above technical solution effectively confines the grouting area between the waterstop strips, preventing grout loss during grouting, ensuring the fullness of the grouting and the sealing effect. At the same time, the circular holes formed by the combination facilitate the insertion and operation of the grouting pipe, improving the convenience of construction.

[0016] Preferably, the outer wall of the tube segment is provided with a connecting groove, which is located on both sides of the bolt hole.

[0017] The above technical solutions provide stable and reliable gripping and positioning points for the tunnel segment assembly equipment, facilitating precise hoisting, translation, and rotation of tunnel segments within the tunnel, thus ensuring the safety and efficiency of the construction process.

[0018] Preferably, the bottom of the tube segment has multiple mounting grooves, and the mounting grooves are trapezoidal.

[0019] The above technical solution utilizes the self-locking characteristics of the trapezoidal structure to provide a convenient installation interface for subsequent installation of tunnel ancillary facilities such as cables and pipelines without drilling or damaging the main structure of the tunnel segments. This enhances the functionality and versatility of the tunnel segments and protects the integrity of the lining structure.

[0020] This utility model has the following beneficial effects: By setting up a positioning frame and connecting block to work together, pre-tightening pressure is actively applied to the waterstop strip during the segment splicing process, forming a physical sealing barrier. This solves the problem of uneven pressure and poor sealing effect caused by the traditional method of relying solely on bolts to squeeze the waterstop strip, which leads to serious water leakage in the later stages of the tunnel. It enhances the reliability of the initial waterproofing of the joint, and the interlocking relationship between the positioning frame and the connecting block also effectively limits the position of the waterstop strip, enhancing the stability and durability of the entire composite waterproof component. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a grouting and sealing waterproof shield tunnel segment structure proposed in this utility model; Figure 2 This is a schematic diagram of the bolt hole structure of a grouting and sealing waterproof shield tunnel segment structure proposed in this utility model; Figure 3 This is a schematic diagram of the grouting hole structure of a grouting and sealing waterproof shield tunnel segment structure proposed in this utility model; Figure 4 This is a schematic diagram of the installation groove structure of a grouting and sealing waterproof shield tunnel segment structure proposed in this utility model; Figure 5 for Figure 1 A magnified structural diagram at point A in the diagram.

[0022] Explanation of reference numerals in the attached drawings: 1. Segment; 2. Bolt hole; 3. Connecting groove; 4. Grouting hole; 5. Mounting groove; 6. Connecting block; 7. Positioning bracket; 8. Waterstop strip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-5 One embodiment of this utility model is a grouting and sealing waterproof shield tunnel segment structure, comprising: Multiple precast segments 1 made of C60 high-strength reinforced concrete serve as basic units to form the main lining structure of the tunnel, playing a core role in resisting soil pressure and groundwater pressure. The positioning frame 7, usually made of Q345B steel, is securely fixed to one side of one of the segments 1 by embedded parts. The positioning frame 7 is used to provide a reference for rapid alignment and connection between multiple segments 1. The connecting block 6, made of wear-resistant polymer material, is fixedly connected to the surface of the groove on one side of another tube segment 1. The connecting block 6 is used to apply extrusion force to the inner wall of the positioning frame 7. The connecting block 6 cooperates with the positioning frame 7 to perform precise sliding connection movement, achieving the effect of rapid assembly and pre-compression of waterproof components. The waterstop strip 8, made of EPDM rubber, is located between the connecting block 6 and the positioning frame 7. It is used to elastically fill and seal the gap between the connecting block 6 and the positioning frame 7, forming a flexible and reliable waterproof barrier that effectively prevents groundwater from seeping in. One side of the highly elastic waterstop strip 8 is bonded and fixed to the inner wall of the positioning frame 7 with special sealant. This design ensures that the initial position of the waterstop strip 8 is accurate during the assembly and docking of the pipe segments 1, preventing it from twisting or falling off. The other side of the waterstop strip 8 is tightly fitted to one side of the connecting block 6 and is effectively compressed under the assembly pressure, enhancing the water tightness. Each pipe segment 1 has a reserved bolt hole 2 on one side for inserting high-strength bolts of M36 and other specifications to finally fasten the adjacent pipe segments 1, connecting multiple pipe segments 1 into a stable and load-bearing overall ring structure. Grouting holes 4 are opened between the two pipe segments 1 on both sides. This specially designed arc structure can accurately combine into a complete circular hole after the two pipe segments 1 are assembled. The grouting holes 4 on both sides are arc structures. The waterstop strip 8 is specially arranged on both sides of the grouting hole 4, forming an effective enclosure and isolation of the grouting area. This ensures that the grout can be confined within the target area and fully fill the gaps, preventing grout loss and achieving the dual effect of improving grouting quality and waterproofing. The two grouting holes 4 can be combined into a circular hole, providing a convenient channel for subsequent synchronous grouting behind the wall or secondary reinforcement grouting. The outer wall of the segment 1 is provided with a connecting groove 3. This connecting groove 3 is used to cooperate with the segment 1 assembly machine grabber inside the shield machine for hoisting and positioning, ensuring that the segment 1 is safely and accurately installed in the design position in the narrow tunnel space, improving construction efficiency and safety. The connecting groove 3 is located on both sides of the bolt hole 2. Multiple mounting grooves 5 are opened at the bottom of the segment 1. The mounting groove 5 has a unique trapezoidal structure, which utilizes the mechanical self-locking principle to install cable brackets, water pipe clamps or other tunnel accessories. It provides a sturdy and reliable mounting base that does not require drilling and does not damage the main structure of the segment 1, thereby enhancing the utilization and functionality of tunnel space.

[0025] Working Principle: During equipment use, two tunnel lining segments 1 are first spliced ​​together. During this process, a positioning frame 7 on one side of one segment 1 is inserted into a groove inside the other segment 1 until the positioning frame 7 engages with a connecting block 6 fixed to the surface of the groove. This ingenious insertion design not only ensures precise alignment and rapid connection of the two segments 1 during splicing, but also applies a continuous and uniform pushing force to the waterstop strip 8 located between the connecting block 6 and the positioning frame 7, causing the waterstop strip 8 to fit tightly and compress. In this way, the elastic waterstop strip 8 effectively fills the gap between the two segments 1, forming a reliable first physical sealing barrier, thus achieving excellent waterproofing and solving the problem of easy leakage at traditional segment connections. Simultaneously, the tight engagement between the connecting block 6 and the positioning frame 7 effectively limits the position of the waterstop strip 8, preventing it from shifting or falling off during subsequent grouting pressure or structural displacement, enhancing the stability and durability of the sealing structure. Subsequently, construction workers can inject grout into the joint of segment 1 through the pre-set arc-shaped grouting holes 4 between the two segments 1. The grouting holes 4 on both sides combine to form a complete circular hole, facilitating the insertion and operation of the grouting pipe. After the grout solidifies, it will provide a secondary seal to the gap, forming a composite waterproof system together with the waterstop strips 8 on both sides, greatly enhancing the waterproof sealing effect of the overall structure. The bolt holes 2 on segment 1 are used for the final fastening connection, further enhancing the integrity and stability of the equipment. The connecting grooves 3 on both sides of the bolt holes 2 and the trapezoidal installation grooves 5 at the bottom provide convenience for the installation and connection of other auxiliary equipment, improving the versatility and construction efficiency of the entire tunnel lining structure.

Claims

1. A grouting and sealing waterproof shield tunnel segment structure, characterized in that, include: Multiple segments (1), the multiple segments (1) are used for tunnel lining; Positioning frame (7), the outer wall of which is fixedly connected to one side of one of the segments (1), the positioning frame (7) is used to provide a reference for rapid alignment and connection between multiple segments (1); A connecting block (6) is fixedly connected to the surface of a groove on one side of another of the tube segments (1) on its outer wall. The connecting block (6) is slidably connected to the inner wall of the positioning frame (7). The connecting block (6) is used to apply a compressive force to the inner wall of the positioning frame (7). Waterstop strip (8) is located between the connecting block (6) and the positioning frame (7) and is used to fill and seal the gap between the connecting block (6) and the positioning frame (7).

2. The grouting and sealing waterproof shield tunnel segment structure according to claim 1, characterized in that: One side of the waterstop strip (8) is glued to the inner wall of the positioning frame (7), and the other side of the waterstop strip (8) is attached to one side of the connecting block (6).

3. The grouting and sealing waterproof shield tunnel segment structure according to claim 1, characterized in that: Each of the segments (1) has a bolt hole (2) on one side, which provides space for the bolt to be inserted.

4. The grouting and sealing waterproof shield tunnel segment structure according to claim 1, characterized in that: Grouting holes (4) are provided between the two sides of the pipe segments (1), and the two sides of the grouting holes (4) are all arc-shaped structures.

5. A grouting and sealing waterproof shield tunnel segment structure according to claim 4, characterized in that: The waterstop strip (8) is located on both sides of the grouting hole (4), and the grouting holes (4) on both sides can be combined to form a circular hole.

6. The grouting and sealing waterproof shield tunnel segment structure according to claim 3, characterized in that: The outer wall of the tube segment (1) is provided with a connecting groove (3), which is located on both sides of the bolt hole (2).

7. A grouting and sealing waterproof shield tunnel segment structure according to claim 1, characterized in that: The bottom of the tube segment (1) is provided with multiple mounting grooves (5), and the mounting grooves (5) are trapezoidal structures.

Images