A grouting support for shield tunnel segment structure

Abstract

This application relates to the field of tunnel segment technology and discloses a grouting support for shield tunnel segment structures. In this application, a laterally rotatable segment support structure is provided, and the support rods have the ability to adjust their longitudinal angle. The lateral rotation structure allows the support structure to adapt to different segment assembly positions and angular deviations, especially in curved sections or variable cross-section areas. Rotation adjustment can compensate for lateral offsets during segment installation, avoiding uneven stress caused by insufficient contact between the support point and the segment. Simultaneously, the longitudinal angle adjustment of the support rods ensures compensation for local segment deformation. When a segment tilts slightly due to assembly errors or ground settlement, the support rods can maintain perpendicular contact with the segment through angle fine-tuning, reducing local pressure concentration and preventing segment breakage due to compression. The synergistic effect of the two directional rotations ensures the positional accuracy of the segments during grouting and reduces the time cost of repeated manual adjustments.

Description

Technical Field

[0001] This application belongs to the field of tunnel segment technology, specifically a grouting support for shield tunnel segment structure. Background Technology

[0002] In shield tunnel construction, grouting after segment assembly is a crucial step in ensuring structural stability and waterproofing. Traditional grouting supports are mostly fixed or simple structures, only suitable for standard segment postures. They are ill-suited to address issues such as segment assembly errors and axial misalignment under complex geological conditions, often leading to uneven grouting and quality defects such as voids and leaks behind the segments. With the increasing number of large-diameter, high-water-pressure tunnel projects, higher demands are placed on precise control of grouting pressure, the fit between the support and the segments, and construction efficiency.

[0003] However, existing supports are limited by poor spatial adaptability and time-consuming disassembly and assembly, making it impossible to support and fix segments at different positions and angles. This results in a lack of construction efficiency and makes it difficult to meet the needs of modern tunnel construction. Utility Model Content

[0004] The purpose of this application is to provide a grouting support for shield tunnel segment structures in order to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: A grouting support for a shield tunnel segment structure includes a chassis. A curved block is installed at the center of the upper surface of the chassis. A bottom telescopic mechanism is connected to the upper end of the curved block. A bottom telescopic column is provided inside the bottom telescopic mechanism, extending through to the upper surface. A steering motor is fixedly installed at the upper end of the bottom telescopic column. A sandwich block is rotatably installed at the upper end of the steering motor. A center block is fixedly installed at the center of the sandwich block. A constant block is fixedly installed at the upper end of the outer circumferential surface of the center block. Slider blocks are rotatably arranged on the left and right sides of the constant block on the outer circumferential surface of the center block. An insert block is provided at the lower end of the slider.

[0006] By adopting the above technical solution, a laterally rotatable segment support structure is set up, and the support rod has the ability to adjust its longitudinal angle. The lateral rotation structure allows the support structure to adapt to different segment assembly positions and angle deviations. Especially in curved sections or variable cross-section areas, the lateral offset during segment installation can be offset by rotation adjustment, avoiding uneven stress caused by insufficient contact between the support point and the segment. At the same time, the longitudinal angle adjustment of the support rod can ensure the compensation effect for local deformation of the segment. When the segment tilts slightly due to assembly errors or ground settlement, the support rod can maintain perpendicular contact with the segment through angle fine adjustment, reducing local pressure concentration and preventing segment damage due to compression. The synergistic effect of the two directions of rotation can ensure the positional accuracy of the segment during grouting and reduce the time cost of repeated manual adjustments.

[0007] In a preferred embodiment, a connecting column is welded to the center of the lower surface of the chassis, and a power compartment is fixedly connected to the lower end of the connecting column. Crossbars are installed at the left and right ends of the power compartment, and tracks are provided on the outer side of the crossbars.

[0008] By adopting the above technical solution, a tracked moving structure is set at the lower end of the overall support structure. In the shield tunneling environment, the bottom of the tunnel often has gravel, water accumulation or unevenness. The track, through its large contact area with the ground, can enhance the grip on uneven ground, reduce the risk of sinking, and through the continuous rolling characteristics of the track, can realize the smooth turning and translation of the support in complex terrain, ensuring the efficiency of structural movement and ensuring operational safety.

[0009] In a preferred embodiment, a screw is mounted through the upper rear surface of the insert.

[0010] By adopting the above technical solution, a screw is installed at the center of the upper surface of the rear end of the insert block. The position of the slider is adjusted according to the needs and fixed by the insert block, providing support for the tunnel segment under the effect of gravity.

[0011] In a preferred embodiment, the lower surface of the power compartment is provided with a slot.

[0012] By adopting the above technical solution, opening a slot outside the power compartment reduces weight. Without affecting the power output of the equipment, the overall weight is reduced by removing redundant structures, which reduces energy consumption when the support moves, reduces the pressure of the equipment on the tunnel floor, avoids damage to the ground surface due to excessive weight, and improves the mobility adaptability of the support in complex environments.

[0013] In a preferred embodiment, a connecting rod is welded to the upper surface of the constant block, and a strut extension mechanism is installed at the upper end of the connecting rod.

[0014] By adopting the above technical solution, a telescopic structure is designed in the strut. It extends when in use and retracts when not in use. In the compact construction space of shield tunnels, fixed-length struts are prone to collisions with surrounding equipment when not in operation. The telescopic design can retract the strut to its shortest state, reducing the space occupied by the support, avoiding collision risks, and ensuring passage in the work area. At the same time, the length of the strut can be precisely adjusted through telescopic extension to ensure a close fit with the tunnel lining segments and provide stable support force, thereby improving the overall construction efficiency.

[0015] In a preferred embodiment, the upper end of the strut telescopic machine is provided with a strut telescopic column, and the upper end of the strut telescopic column is fixedly connected to a receiving block.

[0016] By adopting the above technical solution, the top support mechanism is reinforced by the supporting block to prevent tilting or displacement during support and to prevent the strut structure from breaking.

[0017] In a preferred embodiment, a support plate is provided on the upper surface of the receiving block, and a rubber pad is installed on the upper surface of the support plate.

[0018] By adopting the above technical solution, a rubber pad is set on the upper surface of the grouting support plate. The elastic properties of the rubber material can buffer the rigid contact between the support plate and the tunnel segment, avoiding problems such as wear on the corners of the tunnel segment caused by direct collision. Especially when adjusting the support position at high frequency, it can reduce the accumulation of damage. At the same time, the rubber pad has a high coefficient of friction, which can enhance the contact friction between the support plate and the tunnel segment. During the grouting process, it can prevent the tunnel segment from slipping due to vibration caused by grout pressure or the advancement of the tunnel boring machine, ensuring the stability of the support and providing a guarantee for the smooth operation of the grouting process.

[0019] In a preferred embodiment, rubber balls are spaced apart on the upper surface of the rubber pad.

[0020] By adopting the above technical solution, rubber balls are spaced on the upper surface of the rubber pad. The purpose is to further improve the adaptability and reliability of the tunnel segment support. The rubber pad itself has buffering and anti-slip functions, while the rubber balls enhance the deformation capacity through their unique hemispherical structure. When the support plate contacts the tunnel segment, the composite contact of point and surface can expand the effective support range, disperse local pressure to more contact points, avoid damage to the corners of the tunnel segment caused by stress concentration, and the rubber balls will produce more obvious elastic deformation when compressed, which can better absorb the vibration generated during shield tunneling or grouting, reduce the risk of cracks in the tunnel segment caused by high-frequency vibration, and provide more reliable temporary support for the tunnel segment.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0022] In this application, a laterally rotatable segment support structure is provided, and the support rods have the ability to adjust their longitudinal angle. The lateral rotation structure allows the support structure to adapt to different segment assembly positions and angle deviations. Especially in curved sections or variable cross-section areas, the lateral offset during segment installation can be offset by rotation adjustment, avoiding uneven stress caused by insufficient contact between the support point and the segment. At the same time, the longitudinal angle adjustment of the support rods can ensure the compensation effect for local deformation of the segment. When the segment tilts slightly due to assembly errors or ground settlement, the support rods can maintain perpendicular contact with the segment through angle fine adjustment, reducing local pressure concentration and preventing segment damage due to compression. The synergistic effect of the two directions of rotation can ensure the positional accuracy of the segment during grouting and reduce the time cost of repeated manual adjustments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a bottom view of the overall structure in this application;

[0025] Figure 3 This is a schematic diagram of the internal structure of the sandwich block in this application;

[0026] Figure 4 This is a schematic diagram of the strut structure in this application.

[0027] The markings in the diagram are: 1. Chassis; 2. Curved block; 3. Sandwich block; 4. Bottom telescopic column; 5. Bottom telescopic mechanism; 6. Track; 7. Crossbar; 8. Steering motor; 9. Power compartment; 10. Empty slot; 11. Connecting column; 12. Screw; 13. Insert block; 14. Center block; 15. Slider; 16. Connecting rod; 17. Constant block; 18. Strut telescopic mechanism; 19. Strut telescopic column; 20. Support block; 21. Support plate; 22. Rubber pad; 23. Rubber ball. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Reference Figure 1-4 ,

[0030] Example:

[0031] A grouting support for a shield tunnel segment structure includes a chassis 1. A curved block 2 is installed at the center of the upper surface of the chassis 1. A bottom telescopic mechanism 5 is connected to the upper end of the curved block 2. A bottom telescopic column 4 is installed inside the bottom telescopic mechanism 5, extending through to the upper surface. A steering motor 8 is fixedly installed at the upper end of the bottom telescopic column 4. A sandwich block 3 is rotatably installed at the upper end of the steering motor 8. A center block 14 is fixedly installed at the center of the sandwich block 3. A constant block 17 is fixedly installed at the upper end of the outer circumferential surface of the center block 14. Slider blocks 15 are rotatably arranged on the left and right sides of the constant block 17 on the outer circumferential surface of the center block 14. An insert block 13 is provided at the lower end of the slider 15. This provides a segment support structure that can rotate laterally, allowing the support rod to have... The longitudinal angle adjustment capability and the lateral rotation structure allow the support structure to adapt to different assembly positions and angular deviations of the tunnel segments. Especially in curved sections or areas with variable cross-sections, the lateral offset during tunnel segment installation can be offset by rotational adjustment, avoiding uneven stress caused by insufficient contact between the support point and the tunnel segment. At the same time, the longitudinal angle adjustment of the support rod can ensure the compensation effect for local deformation of the tunnel segment. When the tunnel segment tilts slightly due to assembly errors or ground settlement, the support rod can maintain perpendicular contact with the tunnel segment through fine-tuning of the angle, reducing local pressure concentration and preventing the tunnel segment from being damaged by extrusion. The synergistic effect of the two directions of rotation can ensure the positional accuracy of the tunnel segment during grouting and reduce the time cost of repeated manual adjustments.

[0032] A connecting column 11 is welded to the center of the lower surface of the chassis 1. A power chamber 9 is fixedly connected to the lower end of the connecting column 11. Crossbars 7 are installed on both the left and right ends of the power chamber 9. Tracks 6 are installed on the outer side of the crossbars 7. A tracked moving structure is set at the lower end of the overall support structure. In the shield tunneling environment, the tunnel bottom often has gravel, water accumulation or unevenness. The track can enhance the grip on uneven ground by having a large contact area with the ground, reducing the risk of sinking. It can also achieve smooth turning and translation of the support in complex terrain by the continuous rolling characteristics of the track, ensuring the efficiency of structural movement and ensuring operational safety.

[0033] A screw 12 is installed through the upper rear surface of the insert block 13. The screw is installed at the center of the upper rear surface of the insert block. The position of the slider is adjusted as needed and fixed by the insert block. Under the effect of the gravity of the tube segment, it provides support for the tube segment.

[0034] The lower surface of the power compartment 9 is provided with a slot 10. The slot is opened on the outside of the power compartment to reduce weight. Without affecting the power output of the equipment, the overall weight is reduced by removing redundant structures, which reduces the energy consumption when the support moves, reduces the pressure of the equipment on the tunnel ground, avoids damage to the ground surface due to excessive weight, and improves the mobility of the support in complex environments.

[0035] A connecting rod 16 is welded to the upper surface of the constant block 17. A strut telescopic mechanism 18 is installed at the upper end of the connecting rod 16. The strut is designed with a telescopic structure that extends when in use and retracts when not in use. In the compact construction space of shield tunnels, fixed-length support rods are prone to collisions with surrounding equipment when not in operation. The telescopic design can retract the support rod to its shortest state, reducing the space occupied by the support, avoiding the risk of collision, and ensuring passage in the work area. At the same time, the length of the strut can be precisely adjusted through telescopic extension to ensure that it fits tightly with the tunnel segment and provides stable support force, thereby improving the overall construction efficiency.

[0036] The upper end of the strut telescopic machine 18 is equipped with a strut telescopic column 19, and the upper end of the strut telescopic column 19 is fixedly connected with a support block 20. The support block reinforces the top support mechanism to prevent tilting or displacement during support and to prevent the strut structure from breaking.

[0037] The upper surface of the receiving block 20 is provided with a support plate 21, and a rubber pad 22 is installed on the upper surface of the support plate 21. The rubber pad is installed on the upper surface of the grouting support plate. The elastic properties of the rubber material can buffer the rigid contact between the support plate and the tunnel segment, avoiding problems such as wear on the corners of the tunnel segment caused by direct collision. Especially when adjusting the support position at high frequency, it can reduce the accumulation of damage. At the same time, the rubber pad has a high coefficient of friction, which can enhance the contact friction between the support plate and the tunnel segment. During the grouting process, it can prevent the tunnel segment from slipping due to vibration caused by grout pressure or the advancement of the tunnel boring machine, ensuring the stability of the support and providing a guarantee for the smooth operation of the grouting process.

[0038] Rubber balls 23 are spaced apart on the upper surface of the rubber pad 22. The purpose of spaced rubber balls on the upper surface of the rubber pad is to further improve the adaptability and reliability of the segment support. The rubber pad itself has buffering and anti-slip functions, and the rubber balls can enhance the deformation capacity through their unique hemispherical structure. When the support plate contacts the segment, the composite contact of point and surface can expand the effective support range, disperse local pressure to more contact points, avoid segment corner damage caused by stress concentration, and the rubber balls will produce more obvious elastic deformation when compressed, which can better absorb the vibration generated during shield advancement or grouting, reduce the risk of segment cracks caused by high frequency vibration, and provide more reliable temporary support for the segment.

[0039] The implementation principle of the grouting support for shield tunnel segment structure in this application is as follows: a segment support structure that can rotate laterally is set up, and the support rod has the ability to adjust its longitudinal angle. The lateral rotation structure allows the support structure to adapt to different segment assembly positions and angle deviations. Especially in curved sections or variable cross-section areas, the lateral offset during segment installation can be offset by rotation adjustment, avoiding uneven stress caused by insufficient contact between the support point and the segment. At the same time, the longitudinal angle adjustment of the support rod can ensure the compensation effect for local deformation of the segment. When the segment tilts slightly due to assembly errors or ground settlement, the support rod can maintain perpendicular contact with the segment through angle fine adjustment, reducing local pressure concentration and preventing the segment from being damaged by compression. The synergistic effect of the two directions of rotation can ensure the positional accuracy of the segment during grouting and reduce the time cost of repeated manual adjustments.

[0040] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A shield tunnel segment structure grouting support, comprising a base plate (1), characterized in that: A curved block (2) is installed at the center of the upper surface of the chassis (1). The upper end of the curved block (2) is connected to a bottom telescopic mechanism (5). The bottom telescopic mechanism (5) extends through the interior to the upper surface and is provided with a bottom telescopic column (4). A steering motor (8) is fixedly installed at the upper end of the bottom telescopic column (4). A sandwich block (3) is rotatably installed at the upper end of the steering motor (8). A center block (14) is fixedly installed at the center of the sandwich block (3). A constant block (17) is fixedly installed at the upper end of the outer circumferential surface of the center block (14). A slider (15) is rotatably installed on the left and right sides of the constant block (17) on the outer circumferential surface of the center block (14). An insert block (13) is provided at the lower end of the slider (15).

2. The grouting support for a shield tunnel segment structure as described in claim 1, characterized in that: A connecting column (11) is welded to the center of the lower surface of the chassis (1). A power compartment (9) is fixedly connected to the lower end of the connecting column (11). A crossbar (7) is installed at the left and right ends of the power compartment (9). Tracks (6) are provided on the outer side of the crossbar (7).

3. The grouting support for a shield tunnel segment structure as described in claim 1, characterized in that: A screw (12) is installed through the upper rear surface of the insert (13).

4. A grouting support for a shield tunnel segment structure as described in claim 2, characterized in that: The lower surface of the power compartment (9) is provided with a slot (10).

5. A grouting support for a shield tunnel segment structure as described in claim 1, characterized in that: A connecting rod (16) is welded to the upper surface of the constant block (17), and a strut extension machine (18) is installed at the upper end of the connecting rod (16).

6. A grouting support for a shield tunnel segment structure as described in claim 5, characterized in that: The upper end of the strut telescopic machine (18) is provided with a strut telescopic column (19), and the upper end of the strut telescopic column (19) is fixedly connected with a receiving block (20).

7. A grouting support for a shield tunnel segment structure as described in claim 6, characterized in that: The upper surface of the receiving block (20) is provided with a support plate (21), and a rubber pad (22) is installed on the upper surface of the support plate (21).

8. A grouting support for a shield tunnel segment structure as described in claim 7, characterized in that: Rubber balls (23) are spaced apart on the upper surface of the rubber pad (22).

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