Liftable horizontal supporting and mounting system in stacked shield tunnel

Abstract

The invention provides a liftable horizontal support mounting system in a stacked shield tunnel, relates to the technical field of tunnel construction, and solves the technical problem of poor flexibility in the prior art. The device comprises a rail car, a lifting platform, jacks and a supporting plate, the lifting platform is arranged on the rail car, mounting parts are arranged on the lifting platform, the jacks are detachably mounted on the mounting parts, the mounting parts are arranged in the length direction of the lifting platform, one end of the supporting plate is connected with the driving ends of the jacks, and the other end of the supporting plate is connected with the lifting platform. The other ends of the supporting plates are in an arc shape attached to the inner wall of the shield segment, and the supporting plates are symmetrically arranged on the two sides of the jack. Flexible adjustment of equipment at different positions or heights is achieved through the rail car and the lifting platform, the number of the installed jacks is flexibly adjusted by arranging the multiple installation parts, and therefore flexible adjustment of the supporting force can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a liftable horizontal support installation system in a stacked shield tunnel. Background Art

[0002] In the field of shield tunnel construction, for fully stacked shield tunnels that are constructed in an upper-downward sequence, when constructing the upper tunnel, due to the "unloading effect" of the upper tunnel, the existing tunnel in the lower layer has a tendency to deform vertically into an elliptical shape, and effective horizontal support is required at the arch waist of the tunnel segments.

[0003] Currently, traditional support devices and methods are unable to meet the requirements of this specific construction scenario. Existing support equipment often lacks flexibility and cannot adjust the support position and strength according to the specific conditions in the tunnel; Secondly, there is a lack of suitable solutions for situations where long-distance tunnels require support. Existing devices cannot efficiently achieve long-distance continuous support operations, and are difficult to move and operate conveniently in complex tunnel environments. They cannot guarantee stable and reliable support for the existing tunnel below during the entire construction process, which in turn affects construction quality and tunnel safety.

[0004] Therefore, a new supporting device is urgently needed to solve these problems. Summary of the Invention

[0005] The present invention aims to provide a system for installing horizontal supports in stacked shield tunnels that can be raised and lowered, resolving the technical issues of limited flexibility in the prior art. The various technical benefits of the preferred solution among the various technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a liftable horizontal support installation system in a stacked shield tunnel, comprising a rail car, a lifting platform, a jack and a support plate. The lifting platform is provided on the rail car, and a mounting portion is provided on the lifting platform. The jack is detachably mounted on the mounting portion. Multiple mounting portions are provided along the length direction of the lifting platform. One end of the support plate is connected to the driving end of the jack, and the other end is in an arc shape that fits the inner wall of the shield segment. There are at least one pair of support plates, and they are symmetrically arranged on both sides of the jack.

[0007] Preferably, the mounting portion includes two mounting plates arranged parallel to each other, the two mounting plates and the lifting platform form a mounting groove, and the jack is arranged in the mounting groove.

[0008] Preferably, screw holes are provided on the mounting plate, and the mounting plate is connected to the jack via bolts.

[0009] Preferably, the jack is a bidirectional jack.

[0010] Preferably, the jack and the support plate are connected via a support arm, and the support arm is connected to the driving end of the jack via a flange.

[0011] Preferably, there are multiple rail vehicles, each of which is provided with a connecting arm, and the connecting arms between adjacent rail vehicles are connected by a pin shaft.

[0012] Preferably, a power system is provided on any one or more of the rail vehicles.

[0013] Preferably, it further comprises a jacking cylinder, which is arranged on the rail car at the tail end, a cylinder body of the jacking cylinder is hinged to the rail car, and the jacking cylinder is arranged tilted downward.

[0014] This application adopts the above technical solution, which has at least the following beneficial effects: The liftable horizontal support installation system in the stacked shield tunnel includes a rail car, a lifting platform, a jack and a support plate. The lifting platform is provided on the rail car, and a mounting part is provided on the lifting platform. The jack is detachably installed on the mounting part, so that it can be moved to a specified position by the rail car, and the height of the jack can be adjusted by the lifting platform, thereby realizing flexible adjustment of different positions and heights of the jack. Multiple mounting parts are provided along the length direction of the lifting platform, one end of the support plate is connected to the driving end of the jack, and the other end is in an arc shape that fits the inner wall of the shield segment. There are at least one pair of support plates, and they are symmetrically arranged on both sides of the jack. In this way, the number of installed jacks can be flexibly adjusted according to the actual support strength requirements, thereby realizing flexible adjustment of the support strength.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a liftable horizontal support installation system in a stacked shield tunnel provided by an embodiment of the present invention; Figure 2This is a schematic diagram of the three-dimensional structure of the liftable horizontal support installation system in the stacked shield tunnel provided by an embodiment of the present invention after support installation; Figure 3 This is a side view of the structure of the liftable horizontal support installation system in a stacked shield tunnel provided by an embodiment of the present invention after support installation; Figure 4 This is a schematic diagram of the main structure of the long-distance support mode of the liftable horizontal support installation system in the stacked shield tunnel provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the top view structure of the long-distance support mode of the liftable horizontal support installation system in the stacked shield tunnel provided by an embodiment of the present invention.

[0018] In the figure, 1 is the rail car; 2 is the lifting platform; 3 is the jack; 4 is the support plate; 5 is the mounting part; 6 is the mounting plate; 7 is the screw hole; 8 is the bolt; 9 is the support arm; 10 is the flange; 11 is the connecting arm; 12 is the pin shaft; 13 is the jacking cylinder. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0020] The specific embodiment of the present invention provides a horizontal support installation system that can be raised and lowered in a stacked shield tunnel. Figure 1 As shown, it mainly includes a rail car 1, a lifting platform 2, a jack 3 and a support plate 4. The lifting platform 2 is provided on the rail car 1, and a mounting portion 5 is provided on the lifting platform 2. The jack 3 is detachably mounted on the mounting portion 5. A plurality of mounting portions 5 are provided along the length direction of the lifting platform 2. One end of the support plate 4 is connected to the driving end of the jack 3, and the other end is in an arc shape that fits the inner wall of the shield segment. There are at least one pair of support plates 4, and they are symmetrically arranged on both sides of the jack 3.

[0021] The railcar 1 serves as the mobile foundation for the entire device, traveling on tracks laid within the lower tunnel. Leveraging the existing tracks within the lower tunnel, the stacked shield tunnel's liftable horizontal support installation system adapts to the complex environmental conditions within the lower tunnel, ensuring stable operation and providing a reliable platform for subsequent components.

[0022] The lifting platform 2 is mounted on the railcar 1, and the two are closely combined so that the lifting platform 2 can move in the tunnel along with the railcar. The specific lifting platform 2 can be a scissor-type hydraulic lifting platform, and of course other devices that can achieve lifting can also be used.

[0023] Multiple mounting parts 5 are arranged along the length direction of the lifting platform 2. This design is highly flexible and can adjust the number and position of the jacks 3 according to the specific conditions during the construction process, such as the stress characteristics of different tunnel sections, so as to meet diverse support requirements.

[0024] The detachable nature of jack 3 facilitates maintenance, replacement, and adjustment of support strength and layout according to different working conditions. Jack 3 can be a horizontal bidirectional jack that can load in both horizontal directions. Of course, it can also be a conventional jack with a bidirectional setting to achieve the same function.

[0025] The curved end surface of the support plate 4, which contacts the inner wall of the shield segment, allows it to fit tightly against the shield segment during operation, effectively transmitting support force and preventing unstable support or excessive local pressure. This close-fitting design maximizes the structural characteristics of the shield segment and improves support stability and reliability.

[0026] In this application, the different positions and heights of the jacks 3 are flexibly adjusted by moving and lifting the rail car 1 and the lifting platform 2. This flexibility enables the accurate provision of appropriate horizontal support force for the lower existing tunnel arch waist in a complex and changeable tunnel construction environment, effectively responding to the support requirements under different working conditions. The detachable nature of the jacks not only facilitates maintenance and replacement, but also further enhances the adaptability to different construction conditions. The mounting portion 5 is provided in multiple configurations and is detachably connected to the jacks 3. This allows the number of installed jacks to be flexibly adjusted according to the actual support force requirements, thereby achieving flexible adjustment of the support force. During the construction process, if a jack 3 fails or the support layout needs to be adjusted according to a new force analysis, it can be quickly handled without the need for large-scale changes to the entire device, greatly improving the construction efficiency and practicality of the device.

[0027] In a specific embodiment of the present application, the mounting portion 5 includes two mounting plates 6 arranged parallel to each other. The two mounting plates 6 and the lifting platform 2 form a mounting groove. The jack 3 is arranged in the mounting groove and is connected to the jack 3 through the mounting plate 6. Specifically, a screw hole 7 is provided on the mounting plate 6, and the mounting plate 6 and the jack 3 are connected by bolts 8.

[0028] In some embodiments, the jack 3 is connected to the support plate 4 via a support arm 9, which is in turn connected to the driving end of the jack 3 via a flange 10. This flange connection is both secure and reliable, and facilitates installation and removal. In tunnel construction, where time and precision are crucial, convenient installation and removal improves efficiency while ensuring connection stability over extended periods, reducing safety risks and structural issues caused by loose connections.

[0029] In some embodiments, when long-distance tunnels require support, the stacked shield tunnel of the present application can have multiple liftable horizontal support installation systems, multiple rail cars 1, and connecting arms 11 are provided on the rail cars 1. The connecting arms 11 between adjacent rail cars 1 are connected by pins 12.

[0030] In some embodiments, a power system is provided on any one or more rail vehicles 1 to serve as tractors. In this application, the first rail vehicle 1 can be used as the main vehicle, and the other subsequent rail vehicles 1 can be used as auxiliary vehicles. The main vehicle can be used as the tractor and equipped with a power system to provide power for the movement of the entire device in the tunnel; the auxiliary vehicles are not equipped with a power system and are towed by the main vehicle. This design can reduce costs while ensuring sufficient support capacity and improve the applicability and economy of the device. The power system includes batteries, motors, transmission components, wheels, etc. Since electric rail vehicles are common rail transportation devices, they will not be described in detail.

[0031] In order to ensure the mobility of the long-distance support mode of the rail car, it also includes a jacking cylinder 13. The jacking cylinder 13 is set on the rail car 1 at the rear end. The cylinder body of the jacking cylinder 13 is hinged to the rail car 1, and the jacking cylinder 13 is tilted downward. The jacking cylinder 13 can be used as an auxiliary power device. The extension of the jacking cylinder 13 can press against the ground, and the reaction can push the rail car 1 to move. The hinged setting of the jacking cylinder 13 and the rail car 1 must ensure that the angle between the jacking cylinder 13 and the vertical direction can swing within a certain range. The swing range can be 30° to 70°. In this way, it can be ensured that the jacking cylinder 13 can achieve the pushing effect when extended. At the same time, it works in coordination with the power system of the main vehicle to ensure the stable and precise movement of the whole in the tunnel, and to ensure the efficient operation of the entire device in long-distance tunnel construction.

[0032] In the present invention, the terms "one embodiment," "some embodiments," "examples," "specific examples," "some examples," etc., mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A horizontal support installation system that can be raised and lowered in a stacked shield tunnel, characterized in that: It includes a rail car, a lifting platform, a jack and a support plate. The lifting platform is set on the rail car, and a mounting part is set on the lifting platform. The jack is detachably mounted on the mounting part. Multiple mounting parts are set along the length direction of the lifting platform. One end of the support plate is connected to the driving end of the jack, and the other end is in an arc shape that fits the inner wall of the shield segment. There are at least one pair of support plates, and they are symmetrically arranged on both sides of the jack.

2. The liftable horizontal support installation system in a stacked shield tunnel according to claim 1 is characterized in that: The mounting portion includes two mounting plates arranged parallel to each other. The two mounting plates and the lifting platform form a mounting groove, and the jack is arranged in the mounting groove.

3. The liftable horizontal support installation system in a stacked shield tunnel according to claim 2 is characterized in that: Screw holes are provided on the mounting plate, and the mounting plate is connected to the jack via bolts.

4. The liftable horizontal support installation system in a stacked shield tunnel according to claim 1, characterized in that: The jack is a bidirectional jack.

5. The liftable horizontal support installation system in a stacked shield tunnel according to claim 1, characterized in that: The jack is connected to the support plate via a support arm, and the support arm is connected to the driving end of the jack via a flange.

6. The liftable horizontal support installation system in a stacked shield tunnel according to claim 1, characterized in that: There are multiple rail cars, each of which is provided with a connecting arm, and the connecting arms between adjacent rail cars are connected by a pin shaft.

7. The liftable horizontal support installation system in a stacked shield tunnel according to claim 6, characterized in that: Any one or more of the rail vehicles is provided with a power system.

8. The liftable horizontal support installation system in a stacked shield tunnel according to claim 7, characterized in that: It also includes a jacking oil cylinder, which is arranged on the rail car at the tail end, and the cylinder body of the jacking oil cylinder is hinged to the rail car, and the jacking oil cylinder is arranged to tilt downward.

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