Modularized extensible falling section supporting trolley system for stacked tunnel construction and control method

Abstract

The invention discloses a modular extensible falling section supporting trolley system for stacked tunnel construction and a control method, the modular extensible falling section supporting trolley system comprises falling section supporting trolleys A and B, and the falling section supporting trolleys A and B are respectively composed of at least two single supporting trolleys which are arranged at intervals and two independent trusses which are arranged at intervals and are mutually staggered and interspersed. A telescopic top supporting frame, a telescopic left supporting frame and a telescopic right supporting frame are arranged on each single supporting trolley and each independent truss structure, and the stacked tunnel is supported through switching of the contraction and supporting states of the trolleys A and B or simultaneous work of the trolleys A and B; meanwhile, the bottoms of the falling section supporting trolleys A and B are hinged to the rail supports, and a walking device is matched to achieve movement of the system in the construction process. The problems that a traditional supporting trolley is poor in adaptability, the supporting position is not clear, the supporting force cannot be monitored, and operation is not flexible are solved, the high-flexibility adaptability, the accurate and reliable supporting performance and the efficient and flexible operation capacity are achieved, the construction efficiency can be effectively improved, the construction quality is guaranteed, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and in particular to a modular expandable drop-segment support trolley system and a control method for stacked tunnel construction. Background Art

[0002] With the continuous development and utilization of urban underground space, the number of stacked tunnel construction projects is increasing. Due to factors such as limited construction space and complex tunnel structure stresses, the requirements for support equipment during stacked tunnel construction are extremely high. Traditional support trolleys have many shortcomings when used in stacked tunnel construction.

[0003] Traditional support trolleys have a fixed structure, making them difficult to flexibly adjust to the specific construction requirements of different stacked tunnels. Within the confined construction space, their bulky and immutable structure hinders the transportation of construction materials and equipment, reducing construction efficiency. When encountering different geological conditions or tunnel design changes, they are unable to quickly adapt, increasing construction costs and time.

[0004] The lifting and supporting functions of traditional support trolleys are not precise enough. During stacked tunnel construction, the forces acting on each tunnel layer are complex and variable, requiring support trolleys to precisely adjust the support force and position to ensure the stability of the tunnel segments and avoid problems such as segment misalignment and deformation. However, traditional trolleys typically use simple mechanical or hydraulic control methods, which are unable to monitor and adjust the support status in real time, making them unable to meet the stringent support accuracy requirements of stacked tunnel construction.

[0005] Traditional support trolleys lack flexibility and efficiency. The cramped and complex construction environment of stacked tunnel construction sites demands excellent maneuverability and steering performance. Traditional trolleys often have bulky running mechanisms, making steering difficult and difficult to quickly maneuver into position within confined spaces, hindering construction progress. Furthermore, their drive systems are unstable during startup and shutdown, easily impacting the tunnel structure and posing a safety hazard.

[0006] In summary, traditional support trolleys can no longer meet the needs of stacked tunnel construction, and the development of a new type of support trolley system is urgent. Summary of the Invention

[0007] In view of this, in order to overcome the shortcomings of the existing technology, a modular and expandable drop-section support trolley system and a control method for stacked tunnel construction are provided, aiming to solve many problems of traditional support trolleys in stacked tunnel construction. By designing a modular and expandable support trolley system, hydraulics, adjustment mechanisms and sensors are used to achieve jacking and support, the walking module is optimized to improve operating efficiency, and the electrical control module is used to enhance the collaborative operation capability, thereby improving the adaptability of the equipment, ensuring construction quality, reducing construction costs, shortening the construction period, and promoting the efficient and intelligent development of stacked tunnel construction.

[0008] To achieve the above objectives, the present invention provides, in a first aspect, a modular and expandable drop section support trolley system for stacked tunnel construction, the system comprising a drop section support trolley A and a drop section support trolley B; the drop section support trolley A and the drop section support trolley B are each composed of at least two single support trolleys, each single support trolley being composed of an independent truss structure, and the single support trolleys being arranged at intervals;

[0009] The single support trolleys in the drop section support trolley A and the drop section support trolley B are arranged in an interlaced manner; the upper half and left and right sides of each single support trolley are respectively provided with a retractable support frame, and the bottom is provided with a track support. The A and B drop section support trolley systems arranged in an interlaced manner are installed on the track support, and the operating device drives the entire system to move and advance at a predetermined speed on the track;

[0010] Both the drop section support trolleys A and B have two working conditions: a retracted state and a supporting state, and the two can be in the same working state at the same time; or when the drop section support trolley A is in the supporting state, the drop section support trolley B is in the retracted state and can move on the track support; when the drop section support trolley B is in the supporting state, the drop section support trolley A is in the retracted state and can move on the track support. By alternating the working states of the drop section support trolley A and the drop section support trolley B, continuous support is achieved during the construction of the stacked tunnel, and the movement of the entire drop section support trolley system is realized.

[0011] Furthermore, the single supporting trolley includes a gantry, and a slide is arranged above the gantry; the retractable top support frame is arranged in the slide above the gantry; the top support frame has an arc-shaped supporting surface adapted to the top of the tunnel; and it also includes a top-position retractable driving device, which utilizes the top-position retractable driving device to drive the top support frame to form a supporting state to achieve support for the top area of ​​the tunnel.

[0012] Furthermore, the left side support frame is hinged to the left side of the top support frame; the left side support frame has an arc-shaped support surface adapted to the left side of the tunnel; and it also includes a retractable drive device on the left side, which drives the left side support frame to rise to form a supporting state to support the left side area of ​​the tunnel.

[0013] Furthermore, the right side support frame is hinged to the right side of the top support frame; the right side support frame has an arc-shaped support surface that is adapted to the right side of the tunnel; and it also includes a retractable drive device on the right side, which drives the right side support frame to rise to form a supporting state to support the right side area of ​​the tunnel.

[0014] Furthermore, it includes a first hydraulic device provided on the falling section support trolley A, wherein the first hydraulic device is used to drive the retractable drive device in the falling section support trolley A to work;

[0015] It includes a second hydraulic device arranged on the falling section support trolley B, and the second hydraulic device is used to drive the retractable drive device in the falling section support trolley B to work.

[0016] Furthermore, a hydraulic pipeline bracket is provided on the portal crossbeam supporting the trolley, which is used for supporting the hydraulic pipelines of the first and second hydraulic devices.

[0017] Furthermore, it also includes a stable connector, and the stable connector also includes a connecting beam, which is used to reliably connect the portal frames corresponding to each single supporting trolley in the drop section supporting trolley A, so as to realize the overall movement of the drop section trolley A system during the construction process;

[0018] The connecting beam is used to reliably connect the gantries corresponding to each single support trolley in the drop section support trolley B, so as to realize the overall system movement of the drop section support trolley B during the construction process.

[0019] Furthermore, it also includes a walking mechanism. The bottom of the gantry is hinged on the walking mechanism, and is provided with respective driving wheel groups and corresponding driven wheel groups. The respective driving wheel groups are driven to drive the corresponding driven wheel groups to move, thereby realizing the overall movement of the falling section support trolley A and the falling section support trolley B system.

[0020] A second aspect of the present invention provides a method for controlling a modular expandable drop-section support trolley for stacked tunnel construction, which is applied to the aforementioned modular expandable drop-section support trolley system for stacked tunnel construction, comprising the following steps:

[0021] Working mode selection steps: According to the construction situation of the stacked tunnel, select "simultaneous support mode" or "alternating support movement mode".

[0022] Support operation steps: in the simultaneous support mode, the first hydraulic device and the second hydraulic device are started respectively, and the top support frame is driven to rise along the gantry slide through the top azimuth retractable drive device until the arc-shaped support surface fits the top of the tunnel; the left support frame is driven to rise through the left azimuth retractable drive device so that its arc-shaped support surface fits the left side of the tunnel; the right support frame is driven to rise through the right azimuth retractable drive device so that its arc-shaped support surface fits the right side of the tunnel, thereby realizing synchronous support of the tunnel by two vehicles; the falling section support trolley A or B in the supporting state can observe the pressure value of each support surface through the pressure measuring system, and meet the predetermined construction requirements through appropriate adjustments; in the alternating support movement mode, the hydraulic device of the trolley in the supporting state is first started to complete the above-mentioned support operation, and at the same time, the active wheel group of the trolley in the retracted state is controlled to drive the trolley to move along the track support to the predetermined position;

[0023] Construction advancement steps: After completing the support of the current construction area, if it is a simultaneous support mode, retract the support frames of the two vehicles at the same time, start the active wheel group, move the trolley forward as a whole to the next construction area, and repeat the support operation steps; if it is an alternating support and movement mode, alternately switch the support and movement status of the two vehicles to gradually advance the construction.

[0024] Furthermore, it also includes the construction end step: after completing the construction of the entire stacked tunnel, retract all support frames, turn off the first hydraulic device and the second hydraulic device, stop the operation of the active wheel group, move the trolley to the designated storage location, and clean, maintain and repair the trolley.

[0025] The modular expandable drop-section support trolley system and control method for stacked tunnel construction of the present invention have many outstanding beneficial effects:

[0026] Highly Flexible Adaptability: The system utilizes a modular design, with drop-section support trolleys A and B comprised of multiple individual trolleys interlaced with each other. This structure allows the system to flexibly adjust the number and combination of individual trolleys to suit the size, shape, and construction requirements of different stacked tunnels. Whether confined urban underground spaces or tunnel projects under complex geological conditions, the system can be quickly adapted, significantly reducing construction costs and delays caused by unsuitable equipment.

[0027] Precise and reliable support performance: The retractable top, left, and right support frames on each individual support trolley, combined with corresponding retractable drive and hydraulic devices, provide precise support for the tunnel roof and both sides. The curved support surface conforms to the tunnel wall, and pressure sensors monitor the support force in real time, ensuring precise adjustment of the force and position even under the complex load conditions of stacked tunnels. This effectively prevents problems such as misalignment and deformation of tunnel segments, ensuring construction quality and tunnel structural stability.

[0028] Efficient and flexible operation: The traveling mechanism consists of a driving and driven wheel set. The driving wheel set is driven by a soft-start motor and equipped with a high-speed ratio reducer, ensuring smooth start-up and operation, reducing mechanical impact on the tunnel structure and extending the service life of all transmission components. A special steering mechanism enables the trolley to maneuver flexibly in confined spaces. Furthermore, by switching between "simultaneous support mode" and "alternating support movement mode," the trolley's mobility is maximized in complex construction environments, while meeting construction support requirements, accelerating construction progress.

[0029] Stable and reliable system structure: Stable connectors such as tie beams firmly connect the individual support trolleys, enhancing the structural strength and stability of the entire support trolley system. Even under conditions of vibration and force fluctuations during tunnel construction, the overall structure remains stable, ensuring reliable operation of the support trolleys and providing a strong guarantee for construction safety.

[0030] Intelligent Construction Control: This control method achieves intelligent control of the support trolley system through flexible selection and precise operation of working modes, combined with real-time status monitoring and adjustment. It can automatically adjust the working status of each component according to different construction scenarios and requirements, reducing manual intervention and the risk of human error, improving construction efficiency and automation, and promoting the development of efficient and intelligent stacked tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the overall structure of the support trolley system of the present invention located in a tunnel;

[0033] Figure 2 2 is a schematic structural diagram of the support trolley system of the present invention including support trolley A and support trolley B;

[0034] Figure 3 yes Figure 2 Side view of;

[0035] Figure 4 This is a schematic diagram of the overall structure of the falling section support trolley A of the present invention;

[0036] Figure 5 This is a schematic diagram of the falling section support trolley A of the present invention in a retracted state;

[0037] Figure 6 This is a schematic diagram of the falling section support trolley A of the present invention in a supporting state;

[0038] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point Ⅰ in the middle;

[0039] Figure 8 This is a side view of the drop section support trolley A of the present invention;

[0040] Figure 9 yes Figure 8 A partial enlarged schematic diagram of point II in the middle;

[0041] Figure 10 yes Figure 8 A partial enlarged schematic diagram of point III in the middle;

[0042] Figure 11 yes Figure 8 A partial enlarged schematic diagram of point IV in the middle;

[0043] Figure 12 This is a schematic diagram of the overall structure of the falling section support trolley B of the present invention;

[0044] Figure 13 This is a schematic diagram of the falling section support trolley B of the present invention in a retracted state;

[0045] Figure 14 This is a schematic diagram of the support trolley B of the falling section of the present invention in a supporting state;

[0046] Figure 15 yes Figure 14 A partial enlarged schematic diagram of point Ⅰ in the middle;

[0047] Figure 16 It is a side view of the support trolley B of the falling section of the present invention;

[0048] Figure 17 yes Figure 16 A partial enlarged schematic diagram of point II in the middle;

[0049] Figure 18 yes Figure 16 A partial enlarged schematic diagram of point III in the middle;

[0050] Figure 19 yes Figure 16 A partial enlarged schematic diagram of point IV in the middle.

[0051] In the figure: A, support trolley for the falling section; B, support trolley for the falling section;

[0052] In the support trolley A of the drop section: 1a, gantry A; 2a, top support frame; 31a, left support frame; 32a, right support frame; 4a, slideway; 5a, gantry pin 1; 6a, gantry pin 2; 7a, hydraulic cylinder pin; 8a, connecting beam 1; 9a, connecting beam 2; 10a, connecting beam 3; 11a, scissor brace 1; 12a, connecting plate; 13a, driving wheel group; 14a, driven wheel group; 15a, nylon plate; 16a, track support; 17a, hydraulic system; 18a, drive electrical system;

[0053] In the falling section support trolley B: 1b, gantry B; 2b, top support frame; 31b, left support frame; 32b, right support frame; 4b, slide; 5b, gantry pin 1; 6b, gantry pin 2; 7b, hydraulic cylinder pin; 8b, connecting beam 1; 9b, connecting beam 2; 10b, connecting beam 3; 11b, scissors support 2; 12b, connecting plate; 13b, driving wheel group; 14b, driven wheel group; 15b, nylon plate; 16b, track support; 17b, hydraulic system; 18b, drive electrical system. DETAILED DESCRIPTION

[0054] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0055] like Figure 1 、 Figure 2 and Figure 3 As shown, this embodiment provides a first aspect of the present invention, which provides a modular and expandable drop-section support trolley system for stacked tunnel construction. The design of this system fully considers the complex working conditions of stacked tunnel construction and effectively solves the shortcomings of traditional support equipment. The system includes a drop-section support trolley A and a drop-section support trolley B. The drop-section support trolley A and the drop-section support trolley B are respectively composed of at least two single support trolleys, each of which is composed of an independent truss structure, and the single support trolleys are arranged at intervals.

[0056] like Figure 1 and Figure 2As shown, in this embodiment, the drop section support trolley A includes at least two single support trolleys, that is, at least two independent truss structures, each single support trolley is arranged at intervals, and the single support trolley adopts an independent truss structure; the drop section support trolley B also includes at least two single support trolleys, that is, at least two independent truss structures, each single support trolley is arranged at intervals; the single support trolley also adopts an independent truss structure. This modular layout allows the system to be flexibly adjusted according to the length and width of the tunnel, and is suitable for stacked tunnel projects of different scales, such as stacked tunnel construction such as urban subways or underground integrated pipeline corridors.

[0057] like Figure 3 As shown, the single support trolleys-independent truss structures in the drop section support trolley A and the drop section support trolley B are staggered and interspersed with each other; the upper half of each single support trolley is provided with a retractable top support frame, and the two sides are respectively provided with retractable left support frames and right support frames; the retractable support frames in three directions can fit the tunnel wall in all directions. Under complex geological conditions, such as soft soil formations, water-rich formations, etc., the tunnel stress can be accurately dispersed to prevent tunnel deformation and collapse, and ensure construction safety.

[0058] like Figure 1 As shown, there is also a track support 1, and the staggered drop section support trolley system is installed on the track support and can move along the track support; the drop section support trolley A and the drop section support trolley B both have two working conditions: retracted state and supporting state, and the two can be in the same working state at the same time; or when the drop section support trolley A is in the supporting state, the drop section support trolley B is in the retracted state, which can move on the track support; or when the drop section support trolley B is in the supporting state, the drop section support trolley A is in the retracted state, which can move on the track support. Through this alternating working mode, the system movement can be completed while continuously supporting the tunnel, effectively avoiding the disadvantage of traditional support equipment that requires interruption of support to move, improving construction efficiency, and by alternating the working states of the drop section support trolley A and the drop section support trolley B, the drop section support trolley system can be moved during the continuous support process of the stacked tunnel. During actual operation, the operator is also required to observe and adjust the pressure measurement system at the same time to ensure the stability of the system during construction and the effective and reliable operation of each mechanism.

[0059] Figures 1 to 3 It is a schematic diagram of the overall assembly of the drop section trolley of the present invention. The drop section trolley is divided into two groups, A and B. In actual use, in order to distinguish them, group A can be sprayed with red paint and group B can be sprayed with blue paint; the two groups of trolleys A and B are alternately supported and moved alternately; the supporting action of the drop section trolley is operated by a remote control hydraulic system; the drop section trolley is driven by a motor to move.

[0060] As an implementation method, the single support trolley described in this embodiment includes a gantry with a slideway disposed above the gantry; a retractable top support frame disposed in the slideway above the gantry; the top support frame having a curved support surface adapted to the tunnel ceiling; and a retractable top-position drive device that drives the top support frame upward to form a supporting state, thereby supporting the tunnel ceiling area. The coordination of the curved support surface and the slideway enables the top support frame to stably and precisely conform to the tunnel ceiling, ensuring even distribution of support force.

[0061] As an embodiment, the left-side support frame in this embodiment is hinged to the left of the top support frame; the left-side support frame has a curved support surface that matches the left side of the tunnel; and further includes a left-side retractable drive device that elevates the left-side support frame to form a supporting position, thereby providing support for the left side of the tunnel. The hinged design, combined with the retractable drive device, allows for flexible adjustment of the support angle and strength based on the actual conditions of the left side of the tunnel wall.

[0062] As an implementation mode, the right side support frame in this embodiment is hinged to the right side of the top support frame; the right side support frame has an arc-shaped support surface adapted to the right side of the tunnel; and it also includes a retractable drive device on the right side, which drives the right side support frame to lift and form a supporting state to support the right side area of ​​the tunnel.

[0063] As an implementation mode, this embodiment includes a first hydraulic device provided on the drop section support trolley A, wherein the first hydraulic device is used to drive the retractable drive device in the drop section support trolley A to work;

[0064] It includes a second hydraulic device installed on the drop section support trolley B, which is used to drive the retractable drive device in the drop section support trolley B. The hydraulic drive method has the characteristics of fast response speed and stable driving force, and can achieve precise control of each support frame.

[0065] As an implementation, a hydraulic line bracket is provided on the gantry crossbeam supporting the trolley in this embodiment to support the hydraulic lines of the first and second hydraulic devices. The bracket arranges the hydraulic lines in an orderly manner, preventing entanglement and wear, and ensuring stable operation of the hydraulic system.

[0066] As an implementation mode, this embodiment further includes a stable connector, and the stable connector also includes a connecting beam, which is used to reliably connect the portal frames corresponding to each single supporting trolley in the drop section supporting trolley A, so as to realize the overall movement of the drop section trolley A system during the construction process;

[0067] The connecting beam securely connects the gantries corresponding to the individual support trolleys in the drop section B, enabling the overall movement of the drop section B system during construction. The connecting beam strengthens the connection between the individual support trolleys, ensuring stability of the entire trolley system during movement and preventing sway and deviation.

[0068] As an implementation method, this embodiment also includes a traveling mechanism. The bottom of the portal frame is hinged to the traveling mechanism and is equipped with respective driving wheels and corresponding driven wheels. Driving each driving wheel group drives the corresponding driven wheel group to move, achieving the overall system movement of the drop section support trolley A and the drop section support trolley B. The coordination of the driving and driven wheel groups, combined with the articulated design, enables the trolleys to flexibly steer and smoothly move within the narrow tunnel space, making them suitable for various complex construction environments.

[0069] like Figures 4 to 10 As shown, the structural implementation of the falling section supporting trolley A is specifically shown.

[0070] During the construction of stacked tunnels, the structure of the drop section support trolley A is meticulously and scientifically designed, with all components working in coordination to effectively ensure the smooth progress of the construction. The specific structure is as follows:

[0071] The falling section support trolley A mainly comprises a portal frame A (1a) as a core frame. A slideway (4a) is provided above the portal frame A, and a retractable top support frame (2a) is installed in the slideway (4a). The top support frame (2a) has an arc-shaped support surface adapted to the top of the tunnel. Driven by a top-position retractable drive device (cooperating with a hydraulic system 17a), the top support frame (2a) can be moved upward along the slideway (4a) to support the top area of ​​the tunnel. The coordination of the arc-shaped support surface and the slideway (4a) ensures that the supporting force is evenly distributed and the top of the tunnel is stably and accurately fitted.

[0072] The left support frame (31a) is hinged to the portal frame A (1a) through the portal frame pin 2 (6a) and is located on the left side of the top support frame (2a); the right support frame (32a) is hinged to the portal frame A (1a) through the portal frame pin 2 (6a) and is located on the right side of the top support frame (2a). They respectively have arc-shaped support surfaces that are compatible with the left and right sides of the tunnel. The left-side telescopic drive device and the right-side telescopic drive device (both connected to the hydraulic system 17a) respectively drive the left support frame (31a) and the right support frame (32a) to lift, thereby supporting the left and right areas of the tunnel. This hinged design, combined with the telescopic drive device, can flexibly adjust the support angle and strength according to the actual conditions of the tunnel wall.

[0073] The gantry A (1a) is connected to the traveling mechanism via the gantry pin 1 (5a), so that the gantry A (1a) can be flexibly rotated with the traveling mechanism, providing a basic connection for the movement of the trolley as a whole; the gantry A (1a) is connected to the left support frame (31a) and the right support frame (32a) via the gantry pin 2 (6a). Under the drive of the hydraulic system (17a), the left support frame (31a) and the right support frame (32a) can be extended and retracted, and switched between the supporting and retracted states, thereby ensuring effective support for the tunnel side wall. The hydraulic cylinder pin (7a) is used to connect the hydraulic cylinder with related components, so that the power generated by the hydraulic system (17a) can be effectively transmitted to drive the movement of each support frame.

[0074] Connecting beams 1 (8a), 2 (9a), and 3 (10a) reliably connect the portal frames corresponding to the individual support trolleys in the drop section support trolley A, thereby enhancing the stability of the trolley's overall structure and facilitating the overall movement of the drop section trolley A system during construction. Scissor braces 1 (11a) are provided at structural locations such as the portal frame A (1a) to further enhance the overall rigidity of the structure and prevent the portal frame A (1a) from deforming when subjected to stress.

[0075] The connecting plate (12a) is used to connect different components, improve the connection strength between the components, and ensure that the components can move in coordination during operation.

[0076] The traveling mechanism is composed of a driving wheel group (13a) and a driven wheel group (14a). The bottom of the portal frame A (1a) is hinged to the traveling mechanism via the portal frame pin 1 (5a). The driving wheel group (13a) rotates under the control of the drive electrical system (18a), driving the driven wheel group (14a) to move, thereby achieving the overall movement of the drop section support trolley A. The combination of the driving wheel group (13a) and the driven wheel group (14a), combined with the articulated design, enables the trolley to flexibly turn and move smoothly in the narrow tunnel space.

[0077] The nylon plate (15a) is arranged at the position where the trolley contacts the tunnel wall or where the components move relative to each other, and plays the role of wear resistance and friction reduction, thereby improving the working performance and service life of the trolley.

[0078] The track support (16a) provides a running track for the drop section support trolley A, bearing the weight of the trolley and the load generated during operation. The hydraulic system (17a) is installed on the trolley and provides power to each retractable drive device to achieve precise control of each support frame. The drive electrical system (18a) controls the operation of the driving wheel group (13a) and accurately controls the speed and direction of the trolley on the track.

[0079] In summary, the drop section support trolley A achieves effective support and flexible movement of stacked tunnels through the close cooperation of various components, meeting the needs of complex tunnel construction.

[0080] like Figures 11 to 19 As shown, the structural implementation of the falling section supporting trolley B is specifically shown.

[0081] The drop section support trolley B has a sophisticated structural design, with each component working together to provide reliable support and mobility for stacked tunnel construction. The specific structure is as follows:

[0082] The gantry B (1b) is the main frame foundation of the drop section support trolley B. A slideway (4b) is provided above the gantry B (1b), and the top support frame (2b) is installed in the slideway (4b). The top support frame (2b) has an arc-shaped support surface adapted to the top of the tunnel. It is driven by a top azimuth retractable drive device that cooperates with the hydraulic system 17b and can be pushed up along the slideway (4b) to achieve stable support for the top area of ​​the tunnel. The coordination of the arc-shaped support surface and the slideway (4b) ensures that the support force is evenly distributed and accurately fits the top of the tunnel.

[0083] The left support frame (31b) is hinged to the portal frame B (1b) through the portal frame pin 2 (6b) and is located on the left side of the top support frame (2b); the right support frame (32b) is also hinged to the portal frame B (1b) through the portal frame pin 2 (6b) and is located on the right side of the top support frame (2b). The two have arc-shaped support surfaces that are compatible with the left and right sides of the tunnel respectively. The left-side azimuth telescopic drive device and the right-side azimuth telescopic drive device (both connected to the hydraulic system 17b) respectively drive the left support frame (31b) and the right support frame (32b) to lift, thereby achieving effective support for the left and right areas of the tunnel. This hinged structure, combined with the telescopic drive device, can flexibly adjust the support angle and strength according to the actual situation of the tunnel wall.

[0084] The gantry B (1b) is connected to the traveling mechanism via the gantry pin 1 (5b), allowing the gantry B (1b) to rotate flexibly relative to the traveling mechanism, thus paving the way for the trolley to move. In addition to being used to connect the left and right support frames, the gantry pin 2 (6b) also ensures the flexibility of rotation between the support frame and the gantry B (1b), enabling the support frame to switch between the retracted and supported states. The hydraulic cylinder pin (7b) connects the hydraulic cylinder to related components, allowing the power generated by the hydraulic system (17b) to be effectively transmitted, driving the movement of each support frame.

[0085] Connecting beams 1 (8b), 2 (9b), and 3 (10b) reliably connect the portal frames corresponding to the individual support trolleys in the drop section support trolley B, thereby enhancing the stability of the trolley's overall structure and facilitating the overall movement of the drop section trolley B system during construction. Scissor braces 2 (11b) are provided at structural locations such as the portal frame B (1b) to further enhance the overall structural rigidity and prevent the portal frame B (1b) from deforming when subjected to stress.

[0086] The connecting plate (12b) is used to connect different components, improve the connection strength between the components, and ensure that the components can move in coordination during operation.

[0087] The traveling mechanism is composed of a driving wheel group (13b) and a driven wheel group (14b). The bottom of the portal frame B (1b) is hinged to the traveling mechanism via the portal frame pin 1 (5b). The driving wheel group (13b) rotates under the control of the drive electrical system (18b), driving the driven wheel group (14b) to move, thereby achieving the overall movement of the drop section support trolley B. The cooperation between the driving wheel group (13b) and the driven wheel group (14b), combined with the articulated design, enables the trolley to flexibly turn and move smoothly within the tunnel space.

[0088] The nylon plate (15b) is arranged at the position where the trolley contacts the tunnel wall or where the components move relative to each other, and plays a role in wear resistance and friction reduction, thereby improving the working performance and service life of the trolley.

[0089] The track support (16b) provides a running track for the drop section support trolley B, bearing the weight of the trolley and the load generated during operation. The hydraulic system (17b) is installed on the trolley and provides power to each retractable drive device to achieve precise control of each support frame. The drive electrical system (18b) controls the operation of the driving wheel group (13b) and accurately controls the speed and direction of the trolley on the track.

[0090] In short, the drop section support trolley B achieves effective support and flexible movement of stacked tunnels through the close cooperation of various components, meeting the complex needs of tunnel construction.

[0091] A second aspect of the present invention provides a method for controlling a modular expandable drop-section support trolley for stacked tunnel construction, which is applied to the aforementioned modular expandable drop-section support trolley system for stacked tunnel construction, comprising the following steps:

[0092] Working mode selection steps: Select "simultaneous support mode" or "alternating support and movement mode" based on the construction situation of the stacked tunnel. When construction space is ample and the construction schedule is tight, the simultaneous support mode can be selected to speed up construction progress. When construction space is limited and the geological conditions are complex, the alternating support and movement mode can more flexibly meet construction needs.

[0093] Support operation steps: in the simultaneous support mode, the first hydraulic device and the second hydraulic device are started respectively, and the top support frame is driven to rise along the gantry slide through the top azimuth retractable drive device until the arc-shaped support surface fits the top of the tunnel; the left support frame is driven to rise through the left azimuth retractable drive device so that its arc-shaped support surface fits the left side of the tunnel; the right support frame is driven to rise through the right azimuth retractable drive device so that its arc-shaped support surface fits the right side of the tunnel, thereby realizing synchronous support of the tunnel by two vehicles; the falling section support trolley A or B in the supporting state can observe the pressure value of each support surface through the pressure measuring system, and meet the predetermined construction requirements through appropriate adjustments; in the alternating support movement mode, the hydraulic device of the trolley in the supporting state is first started to complete the above-mentioned support operation, and at the same time, the active wheel group of the trolley in the retracted state is controlled to drive the trolley to move along the track support to the predetermined position;

[0094] Construction advancement steps: After completing the support of the current construction area, if it is in simultaneous support mode, the support frames of both vehicles are retracted simultaneously, the driving wheel group is activated, and the entire vehicle is moved forward to the next construction area, and the support operation steps are repeated. If it is in alternating support and movement mode, the support and movement states of the two vehicles are alternated to gradually advance the construction. This step realizes an orderly cycle of support and movement, ensuring the continuity of tunnel construction.

[0095] The process also includes a construction closing procedure: upon completion of the entire stacked tunnel, all support frames are retracted, the first and second hydraulic devices are deactivated, the driving wheel set is stopped, the trolley is moved to a designated storage location, and the trolley is cleaned, maintained, and repaired. This standardized construction closing procedure helps extend the life of the equipment and ensure its reliability for the next use.

[0096] The above-mentioned modular expandable drop-section support trolley control method for stacked tunnel construction achieves efficient operation and precise control of the support trolley system through close coordination between various steps. In the working mode selection step, the "simultaneous support mode" or "alternating support movement mode" is flexibly selected according to the actual construction situation, laying the foundation for adaptation of the subsequent construction process; in the support operation step, with the help of hydraulic devices and retractable drive devices, the top, left, and right support frames are accurately fitted to the tunnel wall to provide reliable support; the construction advancement step ensures the orderly connection between support and movement through reasonable operations in different modes, ensuring the continuous and stable progress of tunnel construction; the construction end step extends the service life of the equipment through standardized equipment recovery and maintenance processes to prepare for the next construction. The overall control method is closely linked, giving full play to the performance advantages of the support trolley system in stacked tunnel construction, significantly improving construction efficiency and safety, and effectively solving many problems of traditional support trolleys in stacked tunnel construction.

[0097] 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 person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A modular and expandable drop-section support trolley system for stacked tunnel construction, characterized by: The system comprises a drop section support trolley A and a drop section support trolley B; the drop section support trolley A and the drop section support trolley B are respectively composed of at least two single support trolleys, each of which is composed of an independent truss structure, and the single support trolleys are arranged at intervals; the single support trolleys in the drop section support trolley A and the drop section support trolley B are arranged in an interlaced manner; the upper half and the left and right sides of each single support trolley are respectively provided with a retractable support frame, and the bottom is provided with a track support, and the A and B drop section support trolley systems arranged in an interlaced manner are installed on the track support, and the operating device drives the entire system to move and advance at a predetermined speed on the track; Both the drop section support trolleys A and B have two working conditions: a retracted state and a supporting state, and the two can be in the same working state at the same time; or when the drop section support trolley A is in the supporting state, the drop section support trolley B is in the retracted state and can move on the track support; when the drop section support trolley B is in the supporting state, the drop section support trolley A is in the retracted state and can move on the track support. By alternating the working states of the drop section support trolley A and the drop section support trolley B, continuous support is achieved during the construction of the stacked tunnel, and the movement of the entire drop section support trolley system is realized.

2. The system according to claim 1, wherein: The single supporting trolley includes a gantry with a slide arranged above the gantry; the retractable top supporting frame is arranged in the slide above the gantry; the top supporting frame has an arc-shaped supporting surface adapted to the top of the tunnel; and further includes a top-position retractable driving device, which drives the top supporting frame to form a supporting state by utilizing the top-position retractable driving device, thereby realizing support for the top area of ​​the tunnel.

3. The system according to claim 1, wherein: The left side support frame is hinged to the left side of the top support frame; the left side support frame has an arc-shaped support surface that is adapted to the left side of the tunnel; and it also includes a retractable drive device on the left side, which drives the left side support frame to rise to form a supporting state, thereby supporting the left side area of ​​the tunnel.

4. The system according to claim 1, wherein: The right side support frame is hinged to the right side of the top support frame; the right side support frame has an arc-shaped support surface that is adapted to the right side of the tunnel; and it also includes a retractable drive device on the right side, which drives the right side support frame to rise to form a supporting state, thereby supporting the right side area of ​​the tunnel.

5. The system according to claim 1, wherein: It includes a first hydraulic device provided on the drop section support trolley A, the first hydraulic device is used to drive the telescopic drive device in the drop section support trolley A to work; It includes a second hydraulic device arranged on the falling section support trolley B, and the second hydraulic device is used to drive the retractable driving device in the falling section support trolley B to work.

6. The system according to claim 5, characterized in that: A hydraulic pipeline bracket is provided on the portal crossbeam supporting the trolley, which is used for supporting the hydraulic pipelines of the first and second hydraulic devices.

7. The system according to any one of claims 1 to 5, characterized in that: It also includes a stable connector, which also includes a connecting beam. The connecting beam is used to reliably connect the portal frames corresponding to each single supporting trolley in the drop section supporting trolley A to achieve the overall movement of the drop section trolley A system during construction; The connecting beam is used to reliably connect the gantries corresponding to each single support trolley in the drop section support trolley B, so as to realize the overall movement of the drop section support trolley B system during the construction process.

8. The system according to any one of claims 1 to 5, characterized in that: It also includes a walking mechanism. The bottom of the gantry is hinged on the walking mechanism, and is provided with respective driving wheel groups and corresponding driven wheel groups. The respective driving wheel groups are driven to drive the corresponding driven wheel groups to move, thereby realizing the overall system movement of the falling section support trolley A and the falling section support trolley B.

9. A method for controlling a modular, expandable drop-section support trolley for stacked tunnel construction, characterized in that: The modular expandable drop section support trolley system for stacked tunnel construction as claimed in any one of claims 1 to 8 comprises the following steps: Working mode selection steps: Select "simultaneous support mode" or "alternating support and movement mode" according to the construction situation of the stacked tunnel; Support operation steps: in the simultaneous support mode, the first hydraulic device and the second hydraulic device are started respectively, and the top support frame is driven to rise along the gantry slide through the top azimuth retractable drive device until the arc-shaped support surface fits the top of the tunnel; the left support frame is driven to rise through the left azimuth retractable drive device so that its arc-shaped support surface fits the left side of the tunnel; the right support frame is driven to rise through the right azimuth retractable drive device so that its arc-shaped support surface fits the right side of the tunnel, thereby realizing synchronous support of the tunnel by two vehicles; the falling section support trolley A or B in the supporting state can observe the pressure value of each support surface through the pressure measuring system, and meet the predetermined construction requirements through appropriate adjustments; in the alternating support movement mode, the hydraulic device of the trolley in the supporting state is first started to complete the above-mentioned support operation, and at the same time, the active wheel group of the trolley in the retracted state is controlled to drive the trolley to move along the track support to the predetermined position; Construction advancement steps: After completing the support of the current construction area, if it is a simultaneous support mode, retract the support frames of the two vehicles at the same time, start the active wheel group, move the trolley forward as a whole to the next construction area, and repeat the support operation steps; if it is an alternating support and movement mode, alternately switch the support and movement status of the two vehicles to gradually advance the construction.

10. The method according to claim 9, characterized in that: It also includes the construction end steps: after completing the construction of the entire stacked tunnel, retract all support frames, turn off the first hydraulic device and the second hydraulic device, stop the operation of the active wheel group, move the trolley to the designated storage location, and clean, maintain and repair the trolley.

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