Shield tunnel secondary lining end die

Abstract

The utility model relates to the field of shield tunnel construction, in particular to a shield tunnel secondary lining end die which comprises a steel plugging die, a telescopic plug plate and an ejector block, in the process of shield tunnel secondary lining construction, the steel plugging die can be rotated firstly, so that the lower half part of a secondary lining is plugged by the steel plugging die, and the telescopic plug plate is arranged on the lower half part of the secondary lining; the embedded steel bars are arranged on the upper surface of the steel plugging die, in this way, effective arrangement of the construction joint steel bars is achieved, after arrangement of the steel bars is completed, the telescopic plug plate is installed above the steel plugging die, plugging of the upper half portion of the second lining is achieved, meanwhile, the ejector block is installed, and surrounding of the second lining area is achieved. Meanwhile, due to the split type design, the problem that in the related technology, an integral type end die is difficult to rectify deviation is effectively solved, steel bars at the position of a construction joint can be adjusted more conveniently, and the problem that in the shield tunnel construction process, longitudinal steel bars in the construction joint are arranged in a full-length mode and are prone to deviation is solved to a certain degree.

Description

Technical Field

[0001] This application relates to the field of shield tunnel construction, and in particular to a shield tunnel secondary lining end formwork. Background Technology

[0002] With the rapid development of my country's economy, tunnel construction has become an important part of modern infrastructure construction. The main construction methods used in tunnels include shield tunnels and mining tunnels. In shield tunnels, the longitudinal reinforcement of the internal structure is continuous at construction joints, only breaking at expansion joints, and the end formwork must pass through the reinforcement. Shield tunnels do not have embedded waterstops in the secondary lining and do not require waterproofing plates. The assembly precision of shield tunnel segments is high, exceeding that of the initial support and shotcrete surface in mining tunnels, eliminating the need for additional sealing measures after the end formwork is installed.

[0003] The shield tunnel end formwork is a key component in tunnel construction, mainly used for shaping and reinforcing the ends of the secondary lining. Its core functions include structural positioning: precisely controlling the geometric dimensions of the secondary lining end to ensure accurate connection with adjacent segments or structures; load transfer: effectively withstanding the lateral pressure of concrete and equipment loads during construction; and waterproofing system: installing waterstops to ensure that the waterproofing level at the joints meets the requirements.

[0004] In related technologies, the problem of misalignment of longitudinal reinforcement bars in construction joints during shield tunnel construction has remained largely unresolved. Therefore, a new type of end formwork for the secondary lining of shield tunnels is urgently needed to address this issue. Utility Model Content

[0005] In order to solve the problem that the longitudinal reinforcement bars in the construction joint are prone to misalignment during shield tunnel construction, this application provides a shield tunnel secondary lining end formwork.

[0006] The technical solution provided in this application for a shield tunnel secondary lining end formwork adopts the following:

[0007] A shield tunnel secondary lining end formwork, comprising:

[0008] A steel sealing mold is rotatably connected to a trolley template. The steel sealing mold can seal the lower half of the tunnel secondary lining. The steel sealing mold is equipped with a connecting rod assembly, which includes a connecting sleeve and a connecting rod. The end face of the connecting sleeve is fixedly connected to the steel sealing mold, and the connecting rod is movably connected inside the connecting sleeve.

[0009] A telescopic plug plate, capable of sealing the upper half of the tunnel secondary lining, is located above the steel sealing mold; and

[0010] The top block is located at the end of the connecting rod away from the steel sealing mold and is slidably connected to the connecting rod.

[0011] By adopting the above technical solution, the end formwork of the secondary lining in this application is set as a combination of steel sealing formwork, telescopic end plate and top block, so that when the secondary lining is to be poured, it can be sealed in a split manner. The split sealing can achieve precise sealing of the tunnel end face in sections, effectively reducing the problem of the integral end formwork being difficult to correct in related technologies. Moreover, the split design makes it easier to adjust the reinforcement at the construction joint. This application solves to a certain extent the problem of the longitudinal reinforcement of the construction joint being easily misaligned in the shield tunnel construction process in related technologies.

[0012] Optionally, the steel sealing mold is provided with a rebar slot, on which a rebar can be clamped, and the length direction of the slot is parallel to the depth direction of the tunnel.

[0013] By adopting the above technical solution, the setting of the rebar slot can improve the efficiency of rebar arrangement during construction and effectively reduce the deviation of rebar spacing, thus ensuring the uniformity of stress.

[0014] Optionally, multiple rebar slots are provided, and the multiple rebar slots are arranged at equal intervals on the steel sealing mold.

[0015] By adopting the above technical solution, the equal spacing of multiple steel bar slots achieves uniform steel bar distribution, making the stress transfer between the end of the secondary lining and the lining segment more reasonable.

[0016] Optionally, rubber blocks are provided on both sides of the steel sealing mold.

[0017] By adopting the above technical solution, the setting of rubber blocks can form an effective elastic seal, effectively reducing the amount of grout leakage during the subsequent secondary lining grouting process.

[0018] Optionally, the telescopic end plate includes a first end plate and a second end plate, which can slide relative to each other. The first end plate is provided with a groove, and the second end plate is provided with a slider that can slide within the groove.

[0019] By adopting the above technical solution, the telescopic end plate is set as a combination of the first end plate and the second end plate, which can effectively adjust the sealing range of the end plate, so that the novel secondary lining end mold of this application can be adapted to tunnel end faces of more diameters and improve the reuse rate of the end mold.

[0020] Optionally, a limiting crossbar is fixedly connected inside the slide groove, and a limiting component is movably connected to the slider, the limiting component being able to abut against the limiting crossbar.

[0021] By adopting the above technical solution, the mechanical cooperation between the limiting crossbar and the limiting component can effectively improve the adjustment accuracy of the telescopic end plate.

[0022] Optionally, the first end cap plate is further provided with a limiting and fixing platform, which can limit the relative distance between the first end cap plate and the second end cap plate.

[0023] By adopting the above technical solution, the limiting and fixing platform can effectively limit the final state of the telescopic end plate and effectively ensure the support capacity of the telescopic end plate.

[0024] Optionally, the limiting and fixing platform may also be provided with an adjusting bolt, which is threadedly connected to the top surface of the limiting and fixing platform.

[0025] By adopting the above technical solution and adjusting the setting of the bolts, the shortcomings of the limit fixing platform itself being unable to be adjusted can be effectively compensated, which further improves the applicability of the telescopic end plate.

[0026] Optionally, the top block is a compressible rubber block.

[0027] By adopting the above technical solution and setting the top block as a rubber block, the possibility of grout leakage can be effectively reduced.

[0028] Optionally, a custom sealing template can be set between the telescopic end plate and the secondary lining to be poured.

[0029] By adopting the above technical solution and customizing the sealing template settings, the applicability of the secondary lining end mold of this application can be effectively improved.

[0030] In summary, this application includes the following beneficial technical effects:

[0031] (1) By setting the end formwork of the secondary lining in this application as a combination of steel sealing formwork, telescopic sealing plate and top block, it is possible to perform split sealing when the secondary lining is to be poured. Split sealing can achieve precise sealing of tunnel end face sections, effectively reducing the problem of the integral end formwork being difficult to correct in related technologies. Moreover, the split design is more convenient for adjusting the reinforcement at the construction joint. This application solves to some extent the problem of the longitudinal reinforcement of the construction joint being easily misaligned during the shield tunnel construction process in related technologies.

[0032] (2) The setting of the rebar slot can improve the efficiency of rebar arrangement during construction and effectively reduce the deviation of rebar spacing to ensure uniform stress.

[0033] (3) The setting of the limiting and fixing platform and the adjusting bolts effectively improves the applicability of the secondary lining end mold of this application. Attached Figure Description

[0034] Figure 1 This is a front view of the design drawing of the end formwork for the secondary lining of a shield tunnel according to an embodiment of this application.

[0035] Figure 2 yes Figure 1 The side view, at the same time Figure 2 It also demonstrated that the steel sealing mold could rotate around the template of the trolley.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Steel sealing mold; 2. Trolley template; 3. Connecting rod assembly; 31. Connecting sleeve; 32. Connecting rod; 4. Telescopic end plate; 41. First end plate; 42. Second end plate; 5. Top block; 6. Rebar slot; 7. Rubber block; 8. Limiting and fixing platform; 9. Custom sealing template. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model belong to the present utility model.

[0039] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0040] Reference Figure 1 and Figure 2A shield tunnel secondary lining end formwork includes a steel sealing mold 1, a telescopic sealing plate 4, and a top block 5. During the construction of the shield tunnel secondary lining, the rotating steel sealing mold 1 can be set first to seal the lower half of the secondary lining. Then, pre-embedded reinforcing bars are placed on the upper surface of the steel sealing mold 1, thus achieving effective arrangement of the construction joint reinforcing bars. After the reinforcing bars are arranged, the telescopic sealing plate 4 is installed on top of the steel sealing mold 1, thus sealing the upper half of the secondary lining. At the same time, the top block 5 is installed, thus enclosing the secondary lining area. The novel secondary lining end formwork of this application effectively improves construction efficiency. Meanwhile, due to its split design, it effectively reduces the problem of difficulty in correcting deviation in the integral end formwork of related technologies. Moreover, the split design makes it easier to adjust the reinforcing bars at the construction joint. This application solves to some extent the problem of easy deviation of the longitudinal reinforcing bars of the construction joint during shield tunnel construction in related technologies.

[0041] Specifically, in this embodiment, the steel sealing mold 1 is rotatably connected to the trolley template 2. The steel sealing mold 1 can seal the lower half of the tunnel secondary lining. The steel sealing mold 1 is provided with a connecting rod group 3, which includes a connecting sleeve 31 and a connecting rod 32. The end face of the connecting sleeve 31 is fixedly connected to the steel sealing mold 1, and the connecting rod 32 is movably connected inside the connecting sleeve 31.

[0042] It should be noted that in this embodiment, the steel sealing mold 1 is connected to the trolley in the form of a hinge. Furthermore, each steel sealing mold 1 has a pre-drilled clearance hole for bolts to pass through, and the trolley template 2 has threaded holes. When the steel sealing mold 1 needs to be flipped, the bolts that pass through the clearance holes and are threaded into the threaded holes must be removed to achieve the flipping of the steel sealing mold 1.

[0043] In this embodiment, the steel sealing mold 1 is provided with a steel bar slot 6, which can hold steel bars. The length direction of the slot is parallel to the depth direction of the tunnel.

[0044] The design of the rebar slot 6 serves two purposes: firstly, it improves the efficiency of rebar placement during construction; secondly, it effectively reduces rebar spacing deviation and ensures uniform stress distribution. Compared with manual rebar tying in related technologies, the rebar placement method of this application can effectively prevent the occurrence of uneven tension problems from the outset.

[0045] At the same time, multiple rebar slots 6 are provided, and multiple rebar slots 6 are set at equal intervals on the steel sealing mold 1.

[0046] The equal spacing of multiple rebar slots 6 achieves uniform rebar distribution, making the stress transfer between the secondary lining end and the lining segment more reasonable.

[0047] Furthermore, in order to improve the sealing performance of the novel secondary lining end mold of this application and reduce the amount of grout leakage during subsequent secondary lining pouring, rubber blocks 7 are provided on both sides of the steel sealing mold 1.

[0048] The rubber block 7 allows for an effective elastic seal between adjacent steel sealing molds 1, effectively reducing grout leakage during subsequent secondary lining grouting.

[0049] Specifically, in this embodiment, the telescopic plug plate 4 can seal the upper part of the tunnel secondary lining, and the telescopic plug plate 4 is located above the steel sealing mold 1.

[0050] Specifically, the telescopic end plate 4 includes a first end plate 41 and a second end plate 42. The first end plate 41 and the second end plate 42 can slide relative to each other. The first end plate 41 is provided with a sliding groove, and the second end plate 42 is provided with a slider that can slide in the sliding groove.

[0051] By setting the telescopic end plate 4 as a combination of the first end plate 41 and the second end plate 42, the sealing range of the end plate can be effectively adjusted, so that the novel secondary lining end mold of this application can be adapted to tunnel end faces of more diameters and improve the reuse rate of the end mold.

[0052] Furthermore, regarding the working principle between the first end plate 41 and the second end plate 42, specifically, a limiting crossbar is fixedly connected within the groove, and a limiting component is movably connected to the slider, the limiting component abutting against the limiting crossbar. It should be noted that the design of the limiting crossbar and limiting component is readily understood by those skilled in the art, therefore it is not specifically shown in the accompanying drawings of this application. However, this application provides an implementable embodiment. That is, limiting crossbars are set at certain intervals (e.g., 3cm) within the groove, and the limiting component is set as a built-in elastic telescopic rod, with a certain distance (e.g., 5cm) between the fixed end of the telescopic rod and the limiting crossbar. The outer surface of the telescopic end is provided with a corresponding guide slope (the guide slope can also be set within the groove), so that as long as a certain external force is used to push the slider, the limiting component can slide, allowing the slider to achieve precise interval adjustment.

[0053] The mechanical cooperation between the limiting crossbar and the limiting component can effectively improve the adjustment accuracy of the telescopic plug plate 4.

[0054] Furthermore, a limiting and fixing platform 8 is also provided on the first end plate 41, which can limit the relative distance between the first end plate 41 and the second end plate 42.

[0055] The limiting and fixing platform 8 can effectively limit the final state of the telescopic plug plate 4, and effectively ensure the support capacity of the telescopic plug plate 4.

[0056] Meanwhile, to expand the applicability of the telescopic plug plate 4 in this application, an adjusting bolt can also be provided on the limiting and fixing platform 8, and the adjusting bolt is threadedly connected to the top surface of the limiting and fixing platform 8. It should be noted that since the setting of the adjusting bolt is relatively easy for those skilled in the art to understand, the adjusting bolt is not specifically shown in the accompanying drawings of this application.

[0057] The setting of the adjusting bolt can effectively make up for the shortcomings of the limit fixing platform 8 itself being unable to be adjusted, which further improves the applicability of the telescopic end plate 4.

[0058] Furthermore, a custom sealing template 9 can be set between the telescopic end plate 4 and the secondary lining to be poured. As for the selection of the custom sealing template 9, it can be a flared opening, a beveled surface, or other irregular shapes, all of which are embodiments that can be implemented in this application.

[0059] The custom sealing template 9 can effectively improve the applicability of the novel secondary lining end mold of this application.

[0060] Specifically, the top block 5 is located at the end of the connecting rod 32 furthest from the steel sealing mold 1, and is slidably connected to the connecting rod 32. The top block 5 effectively reduces the amount of concrete leaking from the top. It also further enhances the functionality of the novel split-type end mold of this application. The top block 5 is a compressible rubber block. Making the top block 5 a rubber block effectively reduces the possibility of grout leakage.

[0061] The implementation principle of the shield tunnel secondary lining end formwork in this application embodiment is as follows: the secondary lining end formwork of this application is set as a combination of steel sealing formwork 1, telescopic sealing plate 4, and top block 5, so that when the secondary lining is to be poured, it can be sealed in a split manner. The split sealing can achieve precise sealing of the tunnel end face in sections, effectively reducing the problem of the integral end formwork being difficult to correct in related technologies. Moreover, the split design makes it easier to adjust the reinforcement at the construction joint. This application solves to a certain extent the problem of the longitudinal reinforcement of the construction joint being easily misaligned during the shield tunnel construction process in related technologies.

[0062] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail. Although this utility model 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. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A segmental end shield for a second lining of a tunnel, characterized in that include: A steel sealing mold (1) is rotatably connected to a trolley template (2). The steel sealing mold (1) can seal the lower half of the tunnel secondary lining. A connecting rod group (3) is provided on the steel sealing mold (1). The connecting rod group (3) includes a connecting sleeve (31) and a connecting rod (32). The end face of the connecting sleeve (31) is fixedly connected to the steel sealing mold (1), and the connecting rod (32) is movably connected inside the connecting sleeve (31). The telescopic plug (4) is capable of sealing the upper part of the tunnel secondary lining, and the telescopic plug (4) is located above the steel sealing mold (1); and The top block (5) is located at the end of the connecting rod (32) away from the steel sealing mold (1) and is slidably connected to the connecting rod (32).

2. The segmental second lining head form according to claim 1, wherein, The steel sealing mold (1) is provided with a steel bar slot (6), which can hold steel bars. The length direction of the slot is parallel to the depth direction of the tunnel.

3. The segmental end shield according to claim 2, wherein, The steel bar slots (6) are provided in multiple ways, and the multiple steel bar slots (6) are arranged at equal intervals on the steel sealing mold (1).

4. The segmental end shield according to claim 1, wherein, Rubber blocks (7) are provided on both sides of the steel sealing mold (1).

5. The segmental end shield according to claim 1, wherein, The telescopic end plate (4) includes a first end plate (41) and a second end plate (42). The first end plate (41) and the second end plate (42) can slide relative to each other. The first end plate (41) is provided with a sliding groove, and the second end plate (42) is provided with a slider. The slider can slide in the sliding groove.

6. The segmental second lining head form according to claim 5, wherein, A limiting crossbar is fixedly connected inside the slide groove, and a limiting component is movably connected to the slider. The limiting component can abut against the limiting crossbar.

7. The segmental second lining head form according to claim 5, wherein, The first end plate (41) is also provided with a limiting fixing platform (8), which can limit the relative distance between the first end plate (41) and the second end plate (42).

8. The segmental second lining head form according to claim 7, wherein, The limiting and fixing platform (8) can also be provided with an adjusting bolt, which is threadedly connected to the top surface of the limiting and fixing platform (8).

9. The segmental second lining head form according to claim 1, wherein, The top block (5) is a compressible rubber block.

10. The segmental second lining head form according to claim 1, wherein, A custom sealing template (9) can also be set between the telescopic plug plate (4) and the secondary lining to be poured.

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