Gallery trolley in immersed tube tunnel

Abstract

The gallery trolley in the immersed tube tunnel comprises an inner supporting frame and two inner side formworks arranged on the two sides of the inner supporting frame respectively, a top plate structure is arranged at the tops of the inner side formworks, a translation driving piece is arranged at the top of the inner supporting frame to drive the inner side formworks to be close to or away from the inner supporting frame, and a jacking driving piece is arranged at the bottom of the inner supporting frame to enable the inner supporting frame and the inner side formworks to ascend and descend synchronously. During construction, the driving piece is jacked and translated to enable the top plate structure and the inner side formwork to be in place, the top plate structure and the plugging strip form an inner top formwork, and the top plate structure and the inner side formwork form an inner formwork structure; and during demolding, the driving piece is translated and jacked to complete demolding operation. The inner supporting frame and the inner side formwork are formed by splicing a plurality of units. According to the construction method, the effects of facilitating corridor construction and demolding in the immersed tube tunnel and improving the construction efficiency and quality are achieved.

Description

Technical Field

[0001] This application relates to the field of immersed tunnel prefabrication construction, and in particular to a corridor trolley in an immersed tunnel. Background Technology

[0002] Precast immersed tunnels, as an important form of transportation crossing rivers, straits, and other waterways, have seen increasingly widespread application in recent years. This tunnel type not only effectively solves the problem of transportation crossing waterways but also has advantages such as minimal impact on the surrounding environment and a relatively short construction period. With the continuous advancement of infrastructure construction, the demand for precast immersed tunnels is increasing, and their importance in transportation networks is becoming increasingly prominent. Immersed tunnels typically have two driving lanes, with a central corridor between them. The construction quality and efficiency of the central corridor directly affect the construction progress and operational performance of the entire immersed tunnel.

[0003] In the construction of the central corridor of precast immersed tunnels, traditionally, two methods are commonly used for concrete pouring and shaping: wooden formwork and steel formwork. Wooden formwork is generally made of spliced ​​wooden planks, which are fixed to a pre-built support frame using nails or bolts to form the formwork structure. Steel formwork, on the other hand, is mostly made of welded or assembled steel plates into specific shapes, which are then installed on the support structure using specialized clamps and connectors to support the shaping of the central corridor concrete. These methods, to a certain extent, meet the basic requirements of central corridor construction, but they also have their own characteristics and limitations.

[0004] However, these existing formwork devices have some obvious drawbacks. Wooden formwork is prone to moisture damage and deformation, leading to structural instability and making it difficult to guarantee the forming accuracy of the post-pouring strip, thus affecting the construction quality of the central corridor. Although steel formwork has high strength, it is heavy, and the installation and dismantling process is more cumbersome, increasing the difficulty and time cost of construction and hindering the improvement of construction efficiency. Summary of the Invention

[0005] To reduce construction difficulty and time costs, this application provides a corridor trolley for immersed tunnels.

[0006] The technical solution for a tunnel trolley in this application is as follows: A tunnel trolley for immersed tube tunnels includes an inner support frame and two inner side templates. The two inner side templates are placed on both sides of the inner support frame. Each inner side template has a top plate structure that extends horizontally above the top of the inner support frame. The top of the inner support frame is provided with two sets of translation drive components, each corresponding to one of the two inner side templates. The translation drive components are used to drive the corresponding inner side templates to move closer to or away from the inner support frame. The bottom of the inner support frame is provided with a lifting drive component. The lifting drive component forces the inner support frame and inner side templates to move upward synchronously by lifting downward, and forces the inner support frame and inner side templates to move downward synchronously by contracting. During the construction of the central corridor, the lifting drive unit drives the inner support frame to rise, and at the same time drives the top plate structure of the inner formwork to be positioned at the construction position at the top of the central corridor. The translation drive unit drives the inner formwork to move away from the inner support frame, so as to be positioned at the construction positions on both sides of the central corridor, so as to drive the upper inner formwork to unfold outward and abut against the inner wall of the adjacent immersed tube segment; there is a construction gap between the top plate structures of the two inner formworks. During the construction of the middle corridor, sealing strips are installed between the construction joints. The two top plate structures and the sealing strips together form the inner top formwork for the pouring construction of the middle corridor, and together with the inner side formwork, they form the inner formwork structure for the pouring construction of the middle corridor. During demolding, the translation drive causes the inner template to move toward the inner support frame to complete the demolding operation of the inner template position; the lifting drive causes the inner support frame to move downward, and drives the inner template and the top plate structure to move downward as a whole to complete the demolding operation of the inner top template position.

[0007] By adopting the above technical solutions, rapid positioning and demolding of the inner formwork for the concrete pouring of the central tunnel were achieved, significantly improving construction efficiency. The coordination between the internal support frame and the lifting drive allows the entire inner formwork system to rise and fall vertically synchronously, facilitating precise positioning of the top slab structure at the construction location on the top of the tunnel. Meanwhile, the translation drive controls the horizontal movement of the inner formwork, allowing it to expand outwards to meet the tunnel sidewalls or retract inwards to complete demolding, effectively reducing the complexity and time cost of traditional formwork installation and dismantling. Construction gaps between the top slab structures are sealed with sealing strips, ensuring the continuity of the poured concrete. This integrated design is particularly suitable for the space-constrained conditions of the central tunnel in immersed tube tunnels, where high precision in formwork positioning is required.

[0008] Preferably, the inner support frame includes several frame units arranged side by side along the longitudinal direction of the central corridor, and adjacent frame units are spliced ​​and fixed together.

[0009] By adopting the above technical solution, the internal support frame is constructed from multiple frame units. This modular design facilitates transportation and on-site assembly, and can flexibly adapt to the construction needs of central corridors of varying lengths. The splicing and fixing method ensures the rigidity and stability of the overall structure, effectively withstands the lateral pressure during concrete pouring, prevents deformation, and provides a reliable support foundation for the precise movement of the inner formwork. This design aligns with the modular and scalable concept of the overall trolley.

[0010] Preferably, the inner side of the inner template is provided with a plurality of first connecting ears spaced apart along the longitudinal direction of the central corridor, and the top of the inner support frame is provided with a plurality of second connecting ears spaced apart along the longitudinal direction of the central corridor. The plurality of first connecting ears and second connecting ears correspond one-to-one. The translation drive component includes a plurality of horizontally arranged hydraulic cylinders. The plurality of horizontal hydraulic cylinders are spaced apart along the longitudinal direction of the central corridor, and the two ends of the horizontal hydraulic cylinders are connected to the corresponding first connecting ears and second connecting ears, respectively.

[0011] By adopting the above technical solution, the horizontal hydraulic cylinder provides a direct and uniform lateral driving force by connecting the first connecting lug on the inner template and the second connecting lug on the inner support frame. The connecting lugs are spaced apart along the longitudinal direction, ensuring that the force can be evenly transmitted to the entire inner template, allowing it to smoothly approach or move away from the inner support frame. This avoids the template from tilting or getting stuck during movement, improving the accuracy and reliability of the movement.

[0012] Preferably, the top of the inner support frame is provided with several transverse through slots, which are spaced apart along the longitudinal direction of the central corridor. The inner side of the inner template is provided with several transverse square tubes, which are spaced apart along the longitudinal direction of the central corridor. The transverse square tubes correspond one-to-one with the transverse through slots and are slidably inserted into each other. The sliding direction of the transverse square tubes is consistent with the extension and retraction direction of the horizontal hydraulic cylinder.

[0013] By adopting the above technical solution, the sliding connection between the transverse square tube and the transverse through groove provides precise guidance for the horizontal movement of the inner formwork. This design effectively restricts the degree of freedom of the formwork outside the direction of movement, ensuring its linear movement along a predetermined path and enhancing the stability of the system under loads such as concrete pressure. This guiding mechanism works in conjunction with the driving action of the horizontal hydraulic cylinder to jointly ensure the accuracy and stability of the inner formwork displacement.

[0014] Preferably, vertical through pipes are provided at both ends of the inner support frame, and vertical support legs are slidably connected to the vertical through pipes. The vertical through pipes are provided with a third connecting lug, and the vertical support legs are provided with a fourth connecting lug. The lifting drive is a vertical jack, and the upper and lower ends of the vertical jack are connected to the third connecting lug and the fourth connecting lug, respectively. The vertical support legs are driven to slide up and down inside the vertical through pipe by the extension and retraction of the vertical jack.

[0015] By adopting the above technical solution, the sliding connection between the vertical pipe and the vertical support legs, in conjunction with the vertical jacks, constitutes a stable lifting system. The jacks apply force through the third and fourth connecting lugs, driving the support legs to slide within the pipe, thereby achieving smooth vertical lifting and lowering of the inner support frame and its upper formwork system. This design provides precise height control, ensuring reliable transition of the top slab structure between the pouring position and the demolding position, directly corresponding to the overall lifting operation, and is key to achieving rapid positioning and demolding.

[0016] Preferably, the inner template includes several vertical plate units arranged side by side along the longitudinal direction of the central corridor, with adjacent vertical plate units sealed together.

[0017] By adopting the above technical solution, the inner formwork is composed of multiple vertical plate units sealed and spliced ​​together. This modular design facilitates manufacturing, transportation, and installation, and can adapt to possible curves or straight lines in the corridor. The sealed splicing effectively prevents grout leakage during concrete pouring, ensuring the flatness and quality of the inner wall surface of the central corridor. This structure gives the formwork good adaptability and coordinates with the installation positions of other components such as connecting lugs involved in the specifications.

[0018] Preferably, the first connecting ear is fixed between adjacent vertical plate units and serves as a connector between adjacent vertical plate units.

[0019] By adopting the above technical solution, the first connecting ear is fixed between adjacent vertical plate units and also serves as a connector, simplifying the structural design and reducing the number of independent parts. The connecting ear not only provides a force-bearing point for the horizontal hydraulic cylinder but also enhances the connection rigidity between adjacent plate units, resulting in better overall integrity of the inner template under load, thus improving stability and durability. This design integrates functions and embodies the design concept of multi-functional components.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. It enables rapid positioning and demolding of the inner formwork for concrete pouring in the central corridor, significantly improving construction efficiency and reducing the complexity and time cost of traditional formwork installation and dismantling; 2. The internal support frame is made up of multiple frame units, which facilitates transportation and on-site assembly. It can flexibly adapt to the construction needs of medium corridors of different lengths and ensure the rigidity and stability of the overall structure. 3. Construction joints between the top slab structures were sealed with sealing strips to ensure the continuity of the cast-in-place structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a corridor trolley in an immersed tunnel according to an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the splicing state of the frame unit in the corridor trolley of an immersed tunnel according to an embodiment of this application.

[0023] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1. Inner template; 11. First connecting ear; 21. Horizontal square tube; 2. Inner support frame; 21. Second connecting ear; 22. Horizontal through groove; 23. Frame unit; 3. Top slab structure; 4. Vertical through pipe; 41. Third connecting ear; 5. Vertical support leg; 51. Fourth connecting ear; 6. Construction joint. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0026] This application discloses a gallery trolley in an immersed tunnel, referring to... Figures 1 to 3 The system includes an inner support frame 2, two inner templates 1, a top plate structure 3, a translation drive (hidden in the diagram), and a lifting drive (hidden in the diagram). The two inner templates 1 are positioned on either side of the inner support frame 2. The top plate structure 3 is located on top of the two inner templates 1 and extends horizontally above the top of the inner support frame 2. The translation drive is located on top of the inner support frame 2 and corresponds one-to-one with the two inner templates 1. The lifting drive is located at the bottom of the inner support frame 2. This system achieves rapid positioning and demolding of the inner formwork for the central corridor concrete pouring, significantly improving construction efficiency. This is because the inner support frame 2, in conjunction with the lifting drive, allows the entire inner formwork system to rise and fall vertically synchronously, facilitating precise positioning of the top plate structure 3 at the construction location on the top of the corridor. The translation drive controls the horizontal movement of the inner templates 1, allowing them to expand outward to meet the corridor sidewalls or retract inward to complete demolding, effectively reducing the complexity and time cost of traditional formwork installation and dismantling.

[0027] Specifically, the inner support frame 2 comprises several frame units 23 arranged side-by-side along the longitudinal direction of the central corridor, with adjacent frame units 23 spliced ​​and fixed together. The frame units 23 are generally made of metal, such as steel, which has good strength and stability. The frame units 23 can be rectangular frame structures, and can be spliced ​​and fixed together by bolts, a connection method that facilitates disassembly and assembly; alternatively, welding can be used, making the connection more robust. The inner support frame 2, composed of multiple frame units 23, is easy to transport and assemble on-site, flexibly adapting to the construction needs of central corridors of different lengths. The splicing and fixing method ensures the rigidity and stability of the overall structure, effectively withstanding the lateral pressure during concrete pouring, preventing deformation, and providing a reliable support foundation for the precise movement of the inner formwork 1.

[0028] Specifically, the inner template 1 has several first connecting ears 11 spaced apart along the longitudinal direction of the central corridor, and the inner support frame 2 has several second connecting ears 21 spaced apart along the longitudinal direction of the central corridor. Each first connecting ear 11 corresponds to one of the second connecting ears 21. The translation drive includes several horizontally arranged hydraulic cylinders spaced apart along the longitudinal direction of the central corridor. The two ends of each horizontal hydraulic cylinder are connected to the corresponding first connecting ears 11 and second connecting ears 21. The first connecting ears 11 and second connecting ears 21 are typically made of metal, such as steel plates, and can be rectangular, circular, or similar in shape. The first connecting ears 11 and second connecting ears 21 can be fixed to the inner template 1 and inner support frame 2 by welding, or by bolting. Bolting facilitates later maintenance and replacement. One end of the cylinder body of the horizontal hydraulic cylinder is connected to the second connecting ear 21 via a pin, and one end of the piston rod is connected to the first connecting ear 11 via a pin. The horizontal hydraulic cylinder provides a direct and uniform lateral driving force by connecting the first connecting lug 11 on the inner template 1 and the second connecting lug 21 on the inner support frame 2. The connecting lugs are spaced apart along the longitudinal direction, ensuring that the force can be evenly transmitted to the entire inner template 1, allowing it to smoothly move closer to or away from the inner support frame 2. This avoids the template from tilting or getting stuck during movement, improving the accuracy and reliability of the movement.

[0029] Specifically, the top of the inner support frame 2 is provided with several transverse through slots 22, which are spaced apart along the longitudinal direction of the central corridor. The inner side of the inner formwork 1 is provided with several transverse square tubes 21, which are also spaced apart along the longitudinal direction of the central corridor. Each transverse square tube 21 corresponds to and slides into the transverse through slots 22. The sliding direction of the transverse square tubes 21 is consistent with the extension and retraction direction of the horizontal hydraulic cylinder. The transverse through slots 22 can be square or circular, etc., and the shape of the transverse square tubes 21 must be compatible with the transverse through slots 22. The transverse square tubes 21 and transverse through slots 22 are generally made of metal, such as aluminum alloy, which is lightweight and high-strength. The sliding engagement of the transverse square tubes 21 and transverse through slots 22 provides precise guidance for the horizontal movement of the inner formwork 1. This design effectively restricts the degree of freedom of the formwork outside the direction of movement, ensuring its linear movement along a predetermined path and enhancing the stability of the system under loads such as concrete pressure. The guiding mechanism works in conjunction with the driving action of the horizontal hydraulic cylinder to ensure the accuracy and stability of the displacement of the inner template 1.

[0030] Specifically, vertical pipes 4 are respectively installed at both ends of the inner support frame 2. Vertical legs 5 are vertically slidably connected to the vertical pipes 4. The vertical pipes 4 are equipped with a third connecting lug 41, and the vertical legs 5 are equipped with a fourth connecting lug 51. The lifting drive is a vertical jack. The upper and lower ends of the vertical jack are connected to the third connecting lug 41 and the fourth connecting lug 51 respectively. The extension and retraction of the vertical jack drives the vertical legs 5 to slide up and down within the vertical pipes 4. The vertical pipes 4 and vertical legs 5 are usually made of metal tubing, such as steel pipes. The material and structure of the third connecting lug 41 and the fourth connecting lug 51 are similar to those of the first connecting lug 11 and the second connecting lug 21. They are connected to the vertical jack via pins. The sliding connection between the vertical pipes 4 and the vertical legs 5, together with the vertical jack, constitutes a stable lifting system. The jacks apply force through the third and fourth connecting lugs 51, driving the outriggers to slide within the through pipe, thereby achieving stable vertical lifting and lowering of the inner support frame 2 and its upper formwork system. This design provides precise height control, ensuring reliable switching of the top plate structure 3 between the pouring position and the demolding position, directly corresponding to the overall jacking operation, and is key to achieving rapid positioning and demolding.

[0031] Specifically, the inner formwork 1 comprises several vertical plate units arranged side-by-side along the longitudinal direction of the central corridor, with adjacent vertical plate units sealed together. The vertical plate units can be made of materials such as aluminum plates. The shape of the vertical plate units is generally rectangular, and adjacent vertical plate units can be sealed together using sealing strips to prevent grout leakage during concrete pouring. This modular design facilitates manufacturing, transportation, and installation, and can adapt to possible curves or straight lines in the corridor. The sealed joints effectively prevent grout leakage during concrete pouring, ensuring the flatness and quality of the inner wall of the central corridor. This structure gives the formwork good adaptability and coordinates with the installation positions of other components.

[0032] Specifically, the first connecting ear 11 is fixed between adjacent vertical plate units and serves as a connector between them. The first connecting ear 11 can be fixed between adjacent vertical plate units by welding or bolting. This not only provides a force-bearing point for the horizontal hydraulic cylinder but also enhances the connection rigidity between adjacent plate units, making the inner template 1 more robust under load and improving its stability and durability.

[0033] During the construction of the central corridor, the lifting drive unit drives the inner support frame 2 to rise, simultaneously positioning the top plate structure 3 of the inner formwork 1 at the construction position at the top of the central corridor. The translation drive unit drives the inner formwork 1 to move away from the inner support frame 2, positioning it at the construction positions on both sides of the central corridor, thus causing the upper inner formwork 1 to unfold outward and abut against the inner wall of the adjacent immersed tube segment. There is a construction gap 6 between the top plate structures 3 of the two inner formwork 1s. During the construction of the central corridor, sealing strips are installed between the construction gaps 6. The sealing strips can be made of materials such as rubber strips, which have good sealing performance. The two top plate structures 3 and the sealing strips constitute the inner top formwork for the pouring construction of the central corridor, and together with the inner formwork 1, they constitute the inner formwork structure for the pouring construction of the central corridor.

[0034] During demolding, the translation drive causes the inner template 1 to move toward the inner support 2 to complete the demolding operation of the inner template 1; the lifting drive causes the inner support 2 to move down, and moves the inner template 1 and the top plate structure 3 down as a whole to complete the demolding operation of the inner top template.

[0035] The implementation principle of this embodiment is as follows: Through the reasonable arrangement and coordination of the inner support frame 2, inner template 1, top plate structure 3, translation drive component, and lifting drive component, the rapid positioning and demolding of the inner formwork for the concrete pouring of the central corridor is achieved. Compared with traditional wooden and steel formwork, this reduces construction difficulty and time costs. The modular design of the inner support frame 2 facilitates transportation and assembly, and the translation drive component and lifting drive component can precisely control the position of the template, improving construction efficiency and forming accuracy. It has good practicality and innovation, and represents an improvement and enhancement of existing technology.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gallery trolley for immersed tunnels, characterized in that, include: The inner support frame (2) and two inner templates (1) are arranged on both sides of the inner support frame (2). The top of each inner template (1) is provided with a top plate structure (3). The top plate structure (3) extends horizontally to the top of the inner support frame (2). The top of the inner support frame (2) is provided with two sets of translation drive components. The two sets of translation drive components correspond one-to-one with the two inner templates (1). The translation drive components are used to drive the corresponding inner templates (1) to move closer to or away from the inner support frame (2). The bottom of the inner support frame (2) is provided with a lifting drive component. The lifting drive component forces the inner support frame (2) and the inner templates (1) to move upward synchronously by lifting downward, and forces the inner support frame (2) and the inner templates (1) to move downward synchronously by contraction. During the construction of the middle corridor, the lifting drive unit drives the inner support frame (2) to rise, and at the same time drives the top plate structure (3) of the inner template (1) to be in place at the construction position at the top of the middle corridor. The translation drive unit drives the inner template (1) to move away from the inner support frame (2) so as to be in place at the construction position on both sides of the middle corridor, so as to drive the upper inner template (1) to unfold outward and abut against the inner wall of the adjacent immersed tube segment; there is a construction gap (6) between the top plate structures (3) of the two inner templates (1). When constructing the middle corridor, a sealing strip is installed between the construction joints (6). The two top plate structures (3) and the sealing strip together form the inner top template for the middle corridor pouring construction, and together with the inner side template (1), they form the inner formwork structure for the middle corridor pouring construction. During demolding, the sealing strip is removed and the translation drive causes the inner template (1) to move toward the inner support (2) to complete the demolding operation of the inner template (1); the lifting drive causes the inner support (2) to move down and moves the inner template (1) and the top plate structure (3) down as a whole to complete the demolding operation of the inner top template.

2. The trolley for the immersed tunnel as described in claim 1, characterized in that: The inner support frame (2) includes several frame units (23) arranged side by side along the longitudinal direction of the central corridor, and adjacent frame units (23) are spliced ​​and fixed together.

3. The trolley for the immersed tunnel as described in claim 1, characterized in that: The inner side of the inner template (1) is provided with a plurality of first connecting ears (11) spaced apart along the longitudinal direction of the central corridor. The top of the inner support frame (2) is provided with a plurality of second connecting ears (21) spaced apart along the longitudinal direction of the central corridor. The plurality of first connecting ears (11) and second connecting ears (21) correspond one-to-one. The translation drive component includes a plurality of horizontally arranged hydraulic cylinders. The plurality of horizontal hydraulic cylinders are spaced apart along the longitudinal direction of the central corridor. The two ends of the horizontal hydraulic cylinders are respectively connected to the first connecting ears (11) and the second connecting ears (21).

4. The trolley for the immersed tunnel as described in claim 1, characterized in that: The top of the inner support frame (2) is provided with several transverse through slots (22), which are spaced apart along the longitudinal direction of the central corridor. The inner side of the inner template (1) is provided with several transverse square tubes (21), which are spaced apart along the longitudinal direction of the central corridor. The transverse square tubes (21) correspond one-to-one with the transverse through slots (22) and are slidably inserted into each other. The sliding direction of the transverse square tubes (21) is consistent with the extension and retraction direction of the horizontal hydraulic cylinder.

5. A tunnel trolley in an immersed tunnel according to claim 1, characterized in that: The inner support frame (2) is provided with vertical through pipes (4) at both ends. Vertical support legs (5) are vertically slidably connected to the vertical through pipes (4). The vertical through pipes (4) are provided with a third connecting ear (41). The vertical support legs (5) are provided with a fourth connecting ear (51). The lifting drive is a vertical jack. The upper and lower ends of the vertical jack are connected to the third connecting ear (41) and the fourth connecting ear (51) respectively. The vertical support legs (5) are driven to slide up and down in the vertical through pipes (4) by the extension and retraction of the vertical jack.

6. A tunnel trolley in an immersed tunnel according to claim 3, characterized in that: The inner template (1) includes several vertical plate units arranged side by side along the longitudinal direction of the central corridor, with adjacent vertical plate units sealed together.

7. A tunnel trolley in an immersed tunnel according to claim 6, characterized in that: The first connecting ear (11) is fixed between adjacent vertical plate units and serves as a connector between adjacent vertical plate units.

Images