A tunnel construction auxiliary trolley

Abstract

The invention provides a tunnel construction auxiliary trolley, comprising a vehicle frame with two main beam groups; two inverted arch short side wall templates, one inverted arch short side wall template is installed on one of the main beam groups, and the inverted arch short side wall template has a first molding surface; a first template unit, comprising an air bag installed between the two inverted arch short side wall templates, an inverted arch filling end template slidably connected to the two inverted arch short side wall templates, and an air pump connected to the air bag, two ends of the air bag are respectively connected to the extended end of the main beam group and the inverted arch filling end template, in the deployed position of the air bag, the inverted arch filling end template is located at the door frame, the air bag is adjacent to the two inverted arch short side wall templates, and in the folded position of the air bag, the inverted arch filling end template is located at the extended end of the main beam group; a second template unit, comprising the inverted arch end template and a driving mechanism, and the driving mechanism can drive the inverted arch end template to move in a height direction and / or a first direction; the tunnel construction auxiliary trolley has a simple structure and is easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and specifically, to a tunnel construction auxiliary trolley. Background Art

[0002] In tunnel engineering construction, according to the design and inspection standard requirements, the inverted arch and the inverted arch filling must be cast in layers, which requires corresponding tooling equipment to form the inverted arch and the inverted arch filling.

[0003] During the construction process of casting the inverted arch and the inverted arch filling in layers, the inverted arch is cast first, and then the inverted arch filling is cast. Specifically, during construction, the circumferential formwork of the inverted arch and the end formwork of the inverted arch are installed first, and then the inverted arch is cast; after the concrete of the inverted arch reaches the initial setting, the circumferential formwork of the inverted arch is removed, and the end formwork of the inverted arch filling and the formwork of the inverted arch filling (such as the side formwork of the inverted arch filling, the central drainage ditch formwork, etc.) are installed, and then the inverted arch filling is cast. Among them, if there is no need to set the formwork of the inverted arch filling, the installation of the formwork of the inverted arch filling can be cancelled. In addition, the circumferential formwork of the inverted arch can be divided into two types: full-ring type and middle-open type according to the layout method. Therefore, when constructing the inverted arch casting, it is also necessary to consider which layout method to adopt for the circumferential formwork of the inverted arch. Among them, although the inverted arch formed by using the full-ring type circumferential formwork of the inverted arch has high quality, when constructing with the full-ring type circumferential formwork of the inverted arch, the upward buoyancy of the concrete during the inverted arch casting process is likely to cause the circumferential formwork of the inverted arch to deform, and the size of the inverted arch will deviate greatly; while using the middle-open type circumferential formwork of the inverted arch can largely avoid the upward buoyancy, but the forming control difficulty of the arc section in the middle of the inverted arch increases, and the vibration difficulty of the concrete in the middle-open part increases, and the vibration in the middle will inevitably cause the concrete in the two sides of the inverted arch and the low side wall part to slump, resulting in poor forming quality of the inverted arch.

[0004] At present, there are mainly two types of tooling equipment used for the layered pouring construction of invert and invert filling. One is the assembled formwork, and the other is the construction trolley equipped with formwork. Regardless of which type of tooling equipment is used, the types of the invert circumferential formwork can be adjusted according to construction requirements. Among them, when using the assembled formwork to form the invert and invert filling, although it can better save production costs, workers are required to install, position and splice various formworks, etc., and multiple workers need to cooperate simultaneously, resulting in problems such as low efficiency, low accuracy of formwork installation position, and high labor intensity of workers. When using a construction trolley (such as a self-propelled mobile invert trestle) to install various formworks, since the installation of various formworks is controlled by the control system of the trolley and supplemented by manual assistance, the construction efficiency using the construction trolley is much higher than that using the assembled formwork, and the installation position accuracy of various formworks is higher. However, due to the large volume and heavy weight of the existing invert circumferential formwork, the self-propelled mobile invert trestle needs to be equipped with a special lifting and traction mechanism to move the invert circumferential formwork, resulting in a large overall weight, complex structure and high price of the self-propelled mobile invert trestle. In addition, the invert end formwork cannot move with the trolley, so when installing the invert end formwork, it needs to be hoisted to the designated position by a hoisting device (such as a crane) and then fixed and connected to the invert circumferential formwork by workers. This increases the hoisting difficulty of the hoisting device for the invert end formwork when the working space is small, and even makes the hoisting device unusable and requires manual handling of the invert end formwork. Summary of the Invention

[0005] In order to solve the above problems, the main object of the present invention is to provide a tunnel construction auxiliary trolley with a simple structure, convenient operation, high degree of automation and light weight.

[0006] In order to achieve the main object of the present invention, the present invention provides an auxiliary trolley for tunnel construction, which includes a frame, a traveling system, two inverted arch low side wall formworks, a first formwork unit and a second formwork unit. The frame includes a gantry and two sets of main beam groups. The two sets of main beam groups are installed on the gantry, and the main beam groups extend along a first direction. The traveling system includes traveling wheel sets, and the traveling wheel sets are installed at the bottom of the gantry. One inverted arch low side wall formwork is installed on one set of main beam groups, and the inverted arch low side wall formwork extends along the first direction. The inverted arch low side wall formwork has a first forming surface. The first formwork unit includes an airbag, an inverted arch filling end formwork and an air pump. The airbag is installed between the two inverted arch low side wall formworks. The first end of the airbag is fixed to the protruding end of the main beam group, and the second end of the airbag is fixedly connected to the inverted arch filling end formwork. The inverted arch filling end formwork is slidably connected to the two inverted arch low side wall formworks respectively in the first direction. The air pump can inflate or deflate the airbag, and the airbag expands or retracts in the first direction. In the expanded position of the airbag, the inverted arch filling end formwork is located at the gantry, the airbag is adjacent to the two inverted arch low side wall formworks, and the bottom surface of the airbag forms a second forming surface. The second forming surface and the first forming surface form an inverted arch shaping surface. In the retracted position of the airbag, the inverted arch filling end formwork is located at the protruding end of the main beam group, and the second formwork unit is located at the protruding end of the main beam group. The second formwork unit includes an inverted arch end formwork and a driving mechanism. The inverted arch end formwork is located below the main beam group, and the driving mechanism is installed on the frame. The driving mechanism can drive the inverted arch end formwork to move in the height direction and / or the first direction of the frame.

[0007] As can be seen from the above, the tunnel auxiliary construction trolley can assist in the shaping of the invert and the invert filling during the layered pouring construction process of the invert and the invert filling, and shorten the construction time of the invert and the invert filling. When pouring the invert is required, after moving the tunnel construction auxiliary trolley to the designated position, the driving unit is used to drive the invert end form to the first designed position, and the air pump is controlled to inflate the airbag, so that the airbag unfolds and forces the invert filling end form to move to the second designed position (such as adjacent to the already poured invert filling), and the airbag will bulge to the designed shape under the action of the air pump, so as to jointly enclose the invert cavity with the two invert side wall forms and the primary support, so that when the concrete is injected into the invert cavity, the invert is formed; when the concrete of the invert reaches the initial setting, the air pump is controlled to extract air from the airbag, so that the airbag collapses, and the invert filling end form is moved to the third designed position (such as the end of the invert after initial setting) at the extending end of the main beam group, so that the invert filling end form, the two invert side wall forms and the invert jointly enclose the invert filling cavity, and then concrete is injected into the invert filling cavity to form the invert filling. Furthermore, through the structural design of the tunnel construction auxiliary trolley, a temporary drainage ditch can be formed between the formed invert and the invert filling, so as to play a role in temporary drainage during the tunnel construction process; in addition, by designing the first formwork unit, the first formwork unit can not only assist in the formation of the invert and does not require manual installation of the middle arc formwork of the invert by workers, but also can greatly reduce the weight of the tunnel construction auxiliary trolley, simplify the structure of the tunnel construction auxiliary trolley, and reduce the manufacturing cost of the tunnel auxiliary construction trolley; by designing the second formwork unit, the movement of the invert end film does not require manual handling by workers or the assistance of lifting equipment, so that the installation of the invert end form is more convenient.

[0008] A preferred solution is that both the first forming surface and the second forming surface are arc surfaces, and both sides of the second forming surface are tangent to the two first forming surfaces respectively.

[0009] As can be seen from the above, the above design enables the curvature of the invert top surface to meet the design requirements after the invert is formed, and ensures that the mechanical properties of the invert meet the design requirements.

[0010] Another preferred solution is that the airbag has a plurality of inflation chambers, the plurality of inflation chambers are distributed along the first direction, and the air exchange ports of the plurality of inflation chambers are respectively communicated with the air pump.

[0011] As can be seen from the above, through the structural design of the airbag, not only can the flatness of the second forming surface be ensured to improve the forming quality and forming accuracy of the invert, but also the airbag can be quickly deflated and collapsed.

[0012] Another preferred solution is that a set of guiding components is provided on one side of each inverted-arch side-wall formwork facing the first formwork unit. The guiding components extend along the first direction. The first formwork unit further includes two trolley modules. One trolley module is connected between one end of the inverted-arch filling end formwork and a set of guiding components, and at least one trolley module can drive the inverted-arch filling end formwork to slide along the guiding components.

[0013] As can be seen from the above, the above design enables the trolley module to drive the inverted-arch filling end formwork to move along the guiding components, enabling the inverted-arch filling end formwork to move reliably and quickly between the second design position and the third design position, and assisting the airbag to deploy and retract.

[0014] A further solution is that the guiding components include a guide rail and a rack, and the trolley module includes a trolley, a gear set and a motor. The trolley is slidably connected to the guide rail along the extension direction of the guide rail. The inverted-arch filling end formwork, the gear set and the motor are all installed on the trolley. The gear set meshes with the rack, and the motor can drive the gear set to transmit power.

[0015] As can be seen from the above, the above structural design can prevent the trolley module from slipping during the process of driving the inverted-arch filling end formwork to move, enabling the inverted-arch filling end formwork to move reliably and smoothly between the second design position and the third design position, and ensuring that the inverted-arch filling formwork can accurately move to the second design position or the third design position.

[0016] Another preferred solution is that the tunnel construction auxiliary trolley further includes two sets of jacking units. One set of jacking units is installed in one inverted-arch side-wall formwork. The jacking unit includes a telescopic rod. The telescopic rod is parallel to the height direction. The inverted-arch side-wall formwork is provided with an opening on the first forming surface, and the first end of the telescopic rod can pass through the opening and extend below the first forming surface.

[0017] As can be seen from the above, the jacking unit can assist the inverted-arch side-wall formwork to be demoulded when the concrete strength of the inverted-arch filling reaches the driving requirement, and enable the tunnel construction auxiliary trolley to start moving forward easily.

[0018] A further solution is that the jacking unit further includes a roller. The roller is connected to the first end of the telescopic rod, and the telescopic rod can drive the roller to pass through the opening from inside the inverted-arch side-wall formwork and extend below the first forming surface.

[0019] As can be seen from the above, setting a roller on the telescopic rod reduces the friction force during the forward movement of the tunnel construction auxiliary trolley, and better prevents the inverted-arch side-wall formwork from bruising or damaging the inverted arch and / or the inverted-arch filling during the forward movement of the tunnel construction auxiliary trolley, thus playing a protective role for the inverted arch and the inverted-arch filling.

[0020] Another preferred solution is that a bracket and a counterweight are provided on the gantry. The bracket is connected to the gantry, and the counterweight is placed inside the bracket.

[0021] As can be seen from the above, the counterweight can cooperate with the weight of the vehicle frame and the inverted arch low side wall formwork to resist the upward buoyancy generated by the concrete on the airbag during the pouring of the inverted arch, and the counterweight can eliminate the influence of the weight of the main beam group and the inverted arch low side wall formwork on the tunnel construction auxiliary trolley, thereby preventing the tunnel construction auxiliary trolley from tipping over.

[0022] Another preferred solution is that the driving mechanism includes a first driving component and a second driving component. The first driving component includes a first hydraulic telescopic rod, a guide rail component and a sliding frame. The first hydraulic telescopic rod is installed on the main beam group. The guide rail component is connected between the main beam group and the sliding frame. The guide rail component is parallel to the first direction. The first hydraulic telescopic rod can drive the sliding frame to move in the first direction. The second driving component includes a second hydraulic telescopic rod. The second hydraulic telescopic rod is connected between the sliding frame and the inverted arch end formwork. The second hydraulic telescopic rod can drive the inverted arch end formwork to move in the height direction.

[0023] As can be seen from the above, through the structural design of the driving mechanism, the driving structure can drive the inverted arch end formwork to move smoothly and reliably in the first direction and / or the height direction, thereby ensuring that the inverted arch end formwork can accurately move to the first design position.

[0024] Another preferred solution is that the tunnel construction auxiliary trolley further includes legs. The legs are installed at the bottom of the main beam group. The main beam group is located at the bottom of the gantry. The legs are telescopic legs.

[0025] As can be seen from the above, the legs can support between the main beam group and the ground after the tunnel construction auxiliary trolley moves to the designated position, so as to prevent the tunnel construction auxiliary trolley from tipping over during the working process.

[0026] A further solution is that the vehicle frame further includes two sets of tie rod groups. One set of tie rod groups is respectively connected to an inverted arch low side wall formwork and the gantry, and the tie rod group is located above the inverted arch low side wall formwork. The traveling system further includes a driving unit, and the driving unit drives the wheels of the traveling wheel group to rotate.

[0027] As can be seen from the above, the setting of the tie rod group makes the main beam group in a suspended state relative to the gantry, which not only ensures the overall stability of the vehicle frame, but also can greatly reduce the weight of the tunnel construction auxiliary trolley; and the addition of the driving unit to the traveling system makes the movement of the tunnel construction auxiliary trolley more convenient. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the first embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0029] Figure 2 is a schematic structural diagram of the second embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0030] Figure 3 It is the first construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0031] Figure 4 It is the structural schematic diagram of the airbag of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0032] Figure 5 It is Figure 3 The enlarged view at position B in

[0033] Figure 6 It is the structural schematic diagram of the pulley module of the embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0034] Figure 7 It is Figure 3 The enlarged view at position C in

[0035] Figure 8 It is the structural schematic diagram of the third part of the components omitted in the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0036] Figure 9 It is Figure 1 The enlarged view at position A in

[0037] Figure 10 It is Figure 8 The enlarged view at position D in

[0038] Figure 11 It is the first construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention from another perspective.

[0039] Figure 12 It is the second construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0040] Figure 13 It is the second construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention from another perspective.

[0041] Figure 14 It is the third construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0042] Figure 15 It is the fourth construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0044] Embodiment of the tunnel construction auxiliary trolley

[0045] Refer to Figure 1 AndFigure 2 , the tunnel construction auxiliary trolley 100 is used to cooperate with the existing mechanism to form the invert and invert filling of the tunnel during the tunnel construction process. The tunnel construction auxiliary trolley 100 includes a frame 1, a traveling system 2, an invert low side wall formwork 3, a first formwork unit 4, a jacking unit 5 and legs 6.

[0046] The frame 1 includes a gantry 11, a main beam group 12 and a tie rod group 13. The number of the main beam groups 12 is two, and both of the two main beam groups 12 are fixedly installed on the gantry 11. The main beam group 12 extends outward from the gantry 11 in the first direction, and the two main beam groups 12 are distributed in the second direction, so that the two main beam groups 12 are arranged side by side, wherein the second direction is perpendicular to the first direction.

[0047] The traveling system 2 includes a traveling wheel set 21 and a driving unit 22. The traveling wheel set 21 includes a plurality of traveling wheels, and all of the plurality of traveling wheels are installed at the bottom of the gantry 11, so that the frame 1 can move. The driving unit 22 preferably includes a second motor 221, a chain 222 and a sprocket set. The second motor 221 is installed on the gantry 11. The sprocket set includes a first sprocket and a second sprocket. The first sprocket is fixedly connected to the motor shaft of the second motor 221, the second sprocket is coaxially arranged with a traveling wheel and fixedly connected to the traveling wheel, and the chain 222 is engaged between the first sprocket and the second sprocket, so that the driving unit 22 can drive the traveling wheel to rotate to realize driving the frame 1 to move.

[0048] The number of the invert low side wall formworks 3 is two. The two invert low side wall formworks 3 are substantially mirror-symmetrically arranged, and one invert low side wall formwork 3 is fixedly installed on a group of main beam groups 12. The invert low side wall formwork 3 is used to cooperate with the primary support structure 105 and the first formwork unit 4 to form the invert, and the invert low side wall formwork 3 is also used to cooperate with the invert and the first formwork unit 4 to form the invert filling. Wherein, the invert low side wall formwork 3 extends in the first direction, and the invert low side wall formwork 3 has a first forming surface 31 and a third forming surface 32.

[0049] The first forming surface 31 is substantially arranged in an arc surface. The first forming surface 31 is used to cooperate with the primary support structure 105 to form the two ends of the invert and the invert low side wall part. Of course, the first forming surface 31 can also be set as two intersecting but non-tangent arc surfaces according to the design requirements, that is, the intersection of the two arc surfaces is arranged in a bent shape; or the first forming surface 31 can also be set as a plane and an arc surface according to the design requirements, the plane and the arc surface intersect but are not tangent, that is, the intersection of the plane and the arc surface is arranged in a bent shape; or the first forming surface 31 can also be set as two intersecting planes according to the design requirements, and the intersection of the two planes is arranged in a bent shape.

[0050] The third forming surface 32 is used to form the inverted arch in cooperation, and the first formwork unit 4 forms the inverted arch filling. The third forming surface 32 is a plane, and preferably, the third forming surface 32 is perpendicular to the placement surface of the tunnel construction auxiliary trolley 100. That is, when the placement surface is a horizontal plane, the third forming surface 32 is a vertical plane.

[0051] Combined with Figure 5 , the guiding assembly 33 is arranged on the third forming surface 32. In this embodiment, the guiding assembly 33 includes a guide rail 331 and a rack 332. Both the guide rail 331 and the rack 332 extend along the first direction, and the guide rail 331 and the rack 332 are respectively fixedly installed on the third forming surface 32. Among them, the teeth of the racks 332 on the two third forming surfaces 32 face each other.

[0052] Preferably, the main beam group 12 is located at the bottom of the gantry 11, that is, the main beam group 12 is arranged as close as possible to the bottom of the gantry 11, so that the volume and height of the inverted arch side wall formwork 3 can be minimized as much as possible, thereby better reducing the overall weight of the tunnel construction auxiliary trolley 100. Further, a group of main beam groups 12 passes through a corresponding inverted arch side wall formwork 3, which can not only optimize the working space of the tunnel construction auxiliary trolley 100, but also enhance the strength and stiffness of the inverted arch side wall formwork 3.

[0053] The number of the tie rod groups 13 of the vehicle frame 1 is two groups. The two tie rod groups 13 correspond to the two inverted arch side formworks respectively. The tie rod group 13 is located above the inverted arch side wall formwork 3, and both ends of each tie rod of the tie rod group 13 are fixedly connected to a corresponding inverted arch side wall formwork 3 and the gantry 11 respectively. The setting of the tie rod group 13 enables the main beam group 12 to be in a suspended state relative to the gantry 11, which not only ensures the overall stability of the vehicle frame 1, but also can greatly reduce the weight of the tunnel construction auxiliary trolley 100.

[0054] Combined with Figure 3 and Figure 4 , the first formwork unit 4 includes an airbag 41, an inverted arch filling end form 42, a connecting plate 43, a trolley module 44, a connecting pipe 45 and an air pump. The airbag 41 is located between the two inverted arch side wall formworks 3. The first end of the airbag 41 is fixedly installed at the extended end of the main beam group 12 through the connecting plate 43, and the second end of the airbag 41 is fixedly connected to the inverted arch filling end form 42. The airbag 41 preferably has a plurality of inflation chambers 411, and the plurality of inflation chambers 411 are distributed along the first direction, and each inflation chamber 411 has a ventilation port 4111.

[0055] The invert filling end form 42 is connected to the guiding component 33 through the trolley module 44, enabling the trolley module 44 to drive the invert filling end form 42 to slide relative to the two invert side wall forms 3 in the first direction respectively. The number of trolley modules 44 is two. One trolley module 44 is connected between the first end of the invert filling end form 42 and a set of guiding components 33. Preferably, the two trolley modules 44 can simultaneously drive the invert filling end part to slide along the guiding components 33, so that the invert filling end form 42 can move reliably and quickly between the second design position and the third design position, and assist the cylinder to expand and retract. Among them, as Figure 8 shown, the second design position refers to the position where the invert filling end form 42 moves to the limit position towards the gantry 11 in the first direction. For example, in the second design position, the invert filling end form 42 can be adjacent to the formed invert filling 101; as Figure 11 shown, the third design position refers to the position where the invert filling end form 42 moves to the limit position towards the connecting plate 43 in the first direction. For example, in the third design position, the invert filling end form 42 is located at the end face of the freshly poured and initially set invert 104 to cooperate with the freshly poured and initially set invert 104 and the third forming surfaces 32 of the two invert side wall forms 3 to form the to-be-poured invert filling.

[0056] Combined with Figure 5 and Figure 6, the trolley module 44 includes a trolley 441, a gear set 442 and a motor 443. The trolley 441 is slidably connected to the guide rail 331 along the extension direction of the guide rail 331, and one end of the invert filling end form 42 is fixedly connected to a trolley 441. The gear set 442 includes a first gear 4421, a second gear 4422, a third gear 4423 and a gear shaft 4424. The axial direction of the gear shaft 4424 is parallel to the height direction of the vehicle frame 1, and the gear shaft 4424 is rotatably connected to the trolley 441 about its own axis. Among them, the height direction, the first direction and the second direction are perpendicular to each other pairwise. Both the first gear 4421 and the second gear 4422 are fixedly installed on the gear shaft 4424 so that the first gear 4421, the second gear 4422 and the gear shaft 4424 can rotate synchronously. In addition, the number of the first gears 4421 is preferably two. The two first gears 4421 are respectively meshed with the racks 332 of the guiding assembly 33, and the second gear 4422 is located between the two first gears 4421. By designing the number of the first gears 4421, the reliability of the movement of the trolley module 44 relative to the guiding assembly 33 can be improved, and the torque received by the whole gear shaft 4424 can be balanced. The motor 443 is fixedly installed on the trolley 441. The motor shaft of the motor 443 is perpendicular to the gear shaft 4424. The third gear 4423 is fixedly installed on the motor shaft of the motor 443, and the third gear 4423 is meshed with the second gear 4422, so that the motor 443 can drive the second gear 4422 to rotate through the third gear 4423. Furthermore, the second gear 4422 drives the two first gears 4421 to rotate through the gear shaft 4424, so that the trolley module 44 moves along the guiding assembly 33 through the meshing between the first gear 4421 and the rack 332. Through the structural design of the trolley module 44, the phenomenon of slipping of the trolley module 44 during the process of driving the invert filling end form 42 to move can be effectively prevented, so that the invert filling end form 42 can move reliably and smoothly between the second design position and the third design position, and it is ensured that the invert filling end form 42 can accurately move to the second design position and the third design position.

[0057] The air pump is respectively communicated with the air exchange ports 4111 of each inflatable cavity 411 through the connecting pipe 45, so that the air pump can simultaneously inflate or deflate a plurality of inflatable cavities 411 through the connecting pipe 45, so that the airbag 41 can be unfolded or folded in the first direction. Preferably, the connecting pipe 45 is made of a flexible hose.

[0058] When the air pump inflates the airbag 41, the air pump cooperates with the trolley module 44 to control the airbag 41 to expand in the first direction. At the expansion position of the airbag 41, the invert filling end form 42 is located at the gantry 11, that is, the invert filling end form 42 is located at the second designed position. At this time, the airbag 41 will bulge to the designed shape under the action of the air pump, so that the cylinders are respectively adjacent to the third forming surfaces 32 of the two invert side wall forms 3 to seal the gap between the airbag 41 and the third forming surface 32. At the same time, the bottom surface of the airbag 41 will form a second forming surface 412, and the second forming surface 412 cooperates with the first forming surface 31 to form an invert shaping surface to radially shape the top of the invert. Among them, the second forming surface 412 is an arc surface, and both sides of the second forming surface 412 are tangent to the first forming surfaces 31 of the two invert side wall forms 3. Through the design of the second forming surface 412, after the invert is formed, the curvature of the invert top surface can meet the design requirements, so as to ensure that the mechanical properties of the invert meet the design requirements.

[0059] When the air pump evacuates the cylinders, the air pump cooperates with the trolley module 44 to retract the airbag 41 in the first direction. At the retraction position of the airbag 41, the invert filling end form 42 is located at the extended end of the main beam group 12, that is, the third designed position of the invert filling end form 42. It can be seen that the structural design of the airbag 41 can not only ensure the flatness of the second forming surface 412 to improve the forming quality and forming accuracy of the invert, but also enable the airbag 41 to deflate and retract quickly.

[0060] Since the airbag 41 is light in weight and has strong reusability, unlike steel formwork which is prone to rust and deformation after long-term use, its maintenance is simpler and more convenient. Moreover, using the airbag 41 as an auxiliary formwork for invert forming can also solve the problems existing when using steel formwork as an auxiliary formwork for invert forming. For example, when using steel formwork as an auxiliary formwork for invert forming, it is necessary to cooperate with excavators and loaders on site for hoisting, and the operation safety risk is high. In addition, multiple hoistings of the steel formwork by machinery and the disassembly and assembly of the steel formwork are likely to cause deformation of the steel formwork. Another example is that when installing the arc-shaped steel formwork in the middle section of the invert, it needs to be carried out under the trestle 8, and auxiliary equipment (such as excavators, loaders, etc.) is extremely vulnerable to interference from the trestle 8, resulting in difficulties in the hoisting and installation process of the arc-shaped steel formwork in the middle section of the invert, and there are also problems such as time-consuming, laborious, high safety risk, and low efficiency. In addition, since the overall structural performance of the airbag 41 is no different from that of steel formwork after being inflated and full and having a certain inflation pressure, the light weight design of the tunnel construction auxiliary trolley 100 can be maximally realized.

[0061] Preferably, a bracket 111 and a counterweight 112 are provided on the gantry 11. The bracket 111 is fixedly connected to the gantry 11, and the counterweight 112 is placed inside the bracket 111. Among them, the counterweight 112 can be selected from stones or concrete blocks. The counterweight 112 can cooperate with the weights of the vehicle frame 1 and the invert low side wall formwork 3 to resist the upward buoyancy force generated by the concrete on the airbag 41 during the pouring of the invert, and the counterweight 112 can eliminate the influence of the weights of the main beam group 12 and the invert low side wall formwork 3 on the tunnel construction auxiliary trolley 100, thereby preventing the tunnel construction auxiliary trolley 100 from tipping over.

[0062] Combined with Figure 7 , the number of the jacking units 5 is two groups, and one group of jacking units 5 is installed in one invert low side wall formwork 3. Preferably, the jacking unit 5 includes more than two telescopic rods 51 and more than two rollers 52, and the more than two telescopic rods 51 correspond to the more than two rollers 52 one by one. The more than two telescopic rods 51 are distributed in the first direction, the telescopic rods 51 are parallel to the height direction of the vehicle frame 1, the rollers 52 are connected to the first ends of the telescopic rods 51, and the rollers 52 can rotate relative to the telescopic rods 51 around their own axes. Among them, the axial direction of the rollers 52 is parallel to the second direction. The invert low side wall formwork 3 is provided with more than two openings on the first forming surface 31, the more than two openings correspond to the more than two telescopic rods 51 one by one, and in the height direction, one opening is located directly below the corresponding telescopic rod 51. The first end portion of the telescopic rod 51 can pass through the corresponding opening and extend below the first forming surface 31, that is, the telescopic rod 51 can drive the roller 52 thereon to pass through the corresponding opening from inside the invert low side wall formwork 3 and extend below the first forming surface 31 through its first end.

[0063] Preferably, the telescopic rod 51 adopts a third hydraulic telescopic rod. Because the compressibility of the liquid is poor, using the third hydraulic telescopic rod as the telescopic rod 51 can improve the working reliability of the jacking unit 5. The setting of the jacking unit 5 enables the formwork of the invert low side wall 3 to be demoulded after the concrete of the invert filling 117 poured this time meets the driving requirements, and enables the tunnel construction auxiliary trolley 100 to start and move forward easily. And the rollers 52 are arranged on the telescopic rods 51, so that the friction force received by the tunnel construction auxiliary trolley 100 during the forward movement is smaller, and it can better prevent the invert low side wall formwork 3 from being bruised or damaged on the invert and / or the invert filling during the forward movement of the tunnel construction auxiliary trolley 100, thereby playing a protective role for the invert and the invert filling.

[0064] The outriggers 6 are installed at the bottom of the main beam group 12, and the outriggers 6 preferably adopt telescopic outriggers 6 with a mechanical structure (such as a threaded structure). After the tunnel construction auxiliary trolley 100 moves to the designated position, the outriggers 6 can be supported between the main beam group 12 and the ground to prevent the tunnel construction auxiliary trolley 100 from tipping over during operation. Using the telescopic outriggers 6 with a mechanical structure as the outriggers 6 can improve the reliability of the outriggers 6 in supporting the overall tunnel construction auxiliary trolley 100.

[0065] Combined with Figures 8 to 10 , the second formwork unit 7 is arranged at the extended end of the main beam group 12. The second formwork unit 7 includes an invert end form 71 and a driving mechanism 72. Among them, the driving mechanism 72 includes a first driving component 721 and a second driving component 722. The first driving component 721 includes a first hydraulic telescopic rod 7211, a guide rail assembly 7212 and a sliding frame 7213. Both the first hydraulic telescopic rod 7211 and the guide rail assembly 7212 are installed on the main beam group 12, and the guide rail assembly 7212 extends in the first direction. In addition, the guide rail assembly 7212 is fixedly connected between the sliding frame 7213 and the main beam group 12, so that the sliding frame 7213 can move relative to the main beam group 12 through the guide rail assembly 7212. The driving end of the first hydraulic telescopic rod 7211 is connected to the sliding frame 7213, so that the first hydraulic telescopic rod 7211 can drive the sliding frame 7213 to move in the first direction. The second driving component 722 is a second hydraulic telescopic rod, which is fixedly installed on the sliding frame 7213, and the driving end of the second hydraulic telescopic rod is fixedly connected to the invert end form 71, so that the second hydraulic telescopic rod can drive the invert end form 71 to move in the height direction of the vehicle frame. The setting of the second formwork unit 7 enables the movement of the invert end form 71 without manual handling by workers or the aid of lifting equipment, thus making the installation of the invert end form 71 more convenient.

[0066] The following combined with Figures 1 to 15 Briefly describe the working process of the tunnel construction auxiliary trolley 100:

[0067] First, the telescopic rod 51 of the lifting unit 5 can be controlled to drive the roller 52 to extend below the first forming surface 31 of the invert low sidewall form 3 to appropriately lift the invert low sidewall form 3. When the tunnel construction auxiliary trolley 100 is currently at the position where the invert and the invert filling have been poured, the lifting unit 5 can demold the invert low sidewall form 3 from the invert and the invert filling.

[0068] Next, the tunnel construction auxiliary trolley 100 is controlled by the traveling system 2 to move to the next construction section to be constructed and move to the designated position; subsequently, the outriggers 6 are controlled to extend so that the outriggers 6 are supported between the primary support structure 105 and the main beam group 12 to prevent the tunnel construction auxiliary trolley 100 from tipping over.

[0069] Next, the jacking unit 5 is controlled to drive the telescopic rod 51 to retract the roller 52 into the inverted arch side wall formwork 3 to ensure that the inverted arch side wall formwork 3 is in the third designed position; subsequently, the opening on the inverted arch side wall formwork 3 is closed with tape or a geotextile is placed between the opening and the roller 52 to close the opening and prevent concrete from entering the inside of the inverted arch side wall formwork 3 during the pouring of the inverted arch.

[0070] Next, the position of the tunnel construction auxiliary trolley 100 is finely adjusted to ensure the position accuracy of each first formwork unit 4; subsequently, the driving mechanism 72 of the second formwork unit 7 is controlled, so that the first driving assembly 721 and the second driving assembly 722 of the second driving mechanism 72 cooperate to drive the inverted arch end form 71 to move to the first designed position; wherein, the inverted arch end form 71 is located between the support legs 6 and the gantry 11.

[0071] Next, the trestle 8 is erected so that the two ends of the trestle 8 are respectively adjacent to the formed inverted arch filling 101 and the section to be excavated 102. The trestle 8 can provide a temporary driving passage during the construction of the inverted arch and the inverted arch filling.

[0072] Next, as Figure 3 and Figure 8 shown, the air pump of the first formwork unit 4 is controlled to re-inflate the airbag 41, and at the same time, the trolley module 44 synchronously controls the inverted arch filling end form 42 to move to the second designed position until the inverted arch filling end form 42 reaches the second designed position; subsequently, the current position of the trolley module 44 is locked. When the inverted arch filling end form 42 reaches the second designed position, the inverted arch filling end form 42 is adjacent to the previously formed inverted arch filling 101 of the previous section; when the airbag 41 is inflated to the deployed position, the airbag 41 is respectively adjacent to the third forming surfaces 32 of the two inverted arch side wall formworks 3, and the second forming surface 412 formed by the bottom surface of the airbag 41 is respectively tangent to the first forming surfaces 31 of the two inverted arch side wall formworks 3, so that an inverted arch cavity 103 is formed between the airbag 41, the formed inverted arch 108, the two inverted arch side wall formworks 3, and the primary support structure 105.

[0073] Next, as Figure 9 and Figure 10 shown, concrete is injected into the inverted arch cavity 103 to form the inverted arch 104. When pouring the concrete of the inverted arch 104, an opening is formed between the inverted arch side wall formwork 3 and the primary support structure 105 through a chute, so that the concrete automatically fills the inverted arch cavity 103; subsequently, a vibrator can be used to vibrate the concrete at the opening formed between the inverted arch side wall formwork 3 and the primary support structure 105 to make the concrete compacted.

[0074] Next, as Figure 11As shown in the figure, after the inverted arch 104 is poured and reaches the initial setting, the air pump of the first formwork unit 4 evacuates the airbag 41, and at the same time, the trolley module 44 synchronously controls the inverted arch filling end formwork 42 to move to the third designed position until the inverted arch filling end formwork 42 reaches the third designed position, and the airbag 41 is retracted; subsequently, the current position of the trolley module 44 is locked. When the inverted arch filling end formwork 42 reaches the third designed position, the inverted arch filling end formwork 42 is just located at the end of the newly formed inverted arch 104, and an inverted arch filling cavity 106 is formed between the inverted arch filling end formwork 42, the third forming surface 32 of the two tunnel low sidewall formworks, the already formed inverted arch filling 101, and the newly formed inverted arch 104.

[0075] Next, as Figure 12 shown in the figure, concrete is injected into the inverted arch filling cavity 106 to the designed elevation to form the inverted arch filling 107; when the inverted arch filling 107 is poured, a vibrator can be used to vibrate the concrete so that the concrete can be tamped. Among them, when the inverted arch 104 and the inverted arch filling 107 are concreted, the concrete mixer truck can drive onto the trestle 8.

[0076] Next, when the concrete strength of the newly formed inverted arch filling 107 reaches the forming requirement, the driving mechanism 72 of the second formwork unit 7 is controlled, and the first driving component 721 and the second driving component 722 of the second driving mechanism 72 cooperate to drive the inverted arch end formwork 71 to be demoulded, so as to realize the separation of the inverted arch end formwork 71 from the inverted arch 104; subsequently, the telescopic rod 51 of the lifting unit 5 controls the roller 52 thereon to extend below the second forming surface 412 of the inverted arch low sidewall formwork 3 again, so that the roller 52 contacts the low sidewall part of the inverted arch 104, and the lifting unit 5 jacks up the inverted arch low sidewall formwork 3 appropriately to realize the demoulding between the inverted arch low sidewall formwork 3 and the inverted arch 104 and the inverted arch filling 107.

[0077] Next, the support of the support feet for the vehicle frame 1 is released; subsequently, the traveling system 2 controls the tunnel construction auxiliary trolley 100 to move to the next construction section for construction.

[0078] It should be noted that as another implementation method, the inverted arch end formwork 71 can also be fixedly connected to the vehicle frame 1 and not disassembled and assembled twice during construction.

[0079] In summary, the tunnel auxiliary construction trolley can assist in the forming of the inverted arch and the inverted arch filling during the layered pouring construction process of the inverted arch and the inverted arch filling, and shorten the construction time of the inverted arch and the inverted arch filling. Moreover, through the structural design of the tunnel construction auxiliary trolley, a temporary drainage ditch can be formed between the formed inverted arch and the inverted arch filling to play a role in temporary drainage during the tunnel construction process; in addition, by designing the first formwork unit, the first formwork unit can not only assist in the forming of the inverted arch and eliminate the need for manual installation of the arc formwork in the middle section of the inverted arch by workers, but also greatly reduce the weight of the tunnel construction auxiliary trolley, simplify the structure of the tunnel construction auxiliary trolley, and reduce the manufacturing cost of the tunnel auxiliary construction trolley; by designing the second formwork unit, the movement of the end formwork of the inverted arch does not require manual handling by workers or the assistance of lifting equipment, thus making the installation of the end formwork of the inverted arch more convenient.

[0080] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tunnel construction auxiliary trolley, characterized in that: include: A vehicle frame, the vehicle frame comprising a portal frame and two sets of main beam groups, the two sets of main beam groups are mounted on the portal frame, and the main beam groups extend along a first direction; A walking system, the walking system comprising a walking wheel set, and the walking wheel set is installed at the bottom of the gantry; Two inverted arch short side wall templates, one of the inverted arch short side wall templates is installed on one of the main beam groups, the inverted arch short side wall template extends along the first direction, and the inverted arch short side wall template has a first forming surface; A first template unit, the first template unit comprises an air bag, an inverted arch filling end mold and an air pump, the air bag is installed between the two inverted arch short side wall templates, the first end of the air bag is fixed to the extended end of the main beam group, the second end of the air bag is fixedly connected to the inverted arch filling end mold, the inverted arch filling end mold is slidably connected to the two inverted arch short side wall templates in the first direction, the air pump can inflate or exhaust the air bag, the air bag can be expanded or folded in the first direction, in the expanded position of the air bag, the inverted arch filling end mold is located at the door frame, the air bag is adjacent to the two inverted arch short side wall templates, and the bottom surface of the air bag forms a second molding surface, the second molding surface and the first molding surface form an inverted arch shaping surface, and in the folded position of the air bag, the inverted arch filling end mold is located at the extended end of the main beam group; The second formwork unit is located at the protruding end of the main beam group, and the second formwork unit includes an inverted arch end formwork and a driving mechanism. The inverted arch end formwork is located below the main beam group, and the driving mechanism is installed on the frame. The driving mechanism can drive the inverted arch end formwork to move in the height direction of the frame and / or the first direction.

2. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The first molding surface and the second molding surface are both arc surfaces, and two sides of the second molding surface are tangent to the two first molding surfaces respectively.

3. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The airbag has a plurality of inflation chambers, the plurality of inflation chambers are distributed along the first direction, and the ventilation ports of the plurality of inflation chambers are respectively connected to the air pump.

4. The tunnel construction auxiliary trolley according to claim 1, characterized in that: Each of the inverted arch low side wall templates is provided with a set of guide components on a surface facing the first template unit, and the guide components extend along the first direction; The first template unit also includes two pulley modules, one of which is connected between one end of the inverted arch filling end mold and a group of guide components, and at least one of which can drive the inverted arch filling end mold to slide along the guide component.

5. The tunnel construction auxiliary trolley according to claim 4, characterized in that: The guide assembly includes a guide rail and a rack; The pulley module includes a pulley, a gear set and a motor. The pulley is slidably connected to the guide rail along the extension direction of the guide rail. The arch filling end mold, the gear set and the motor are all installed on the pulley. The gear set is meshed with the rack, and the motor can drive the gear set to transmit.

6. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The tunnel construction auxiliary trolley also includes two groups of jacking units, one group of the jacking units is installed in one of the inverted arch short side wall templates, and the jacking unit includes a telescopic rod, and the telescopic rod is parallel to the height direction; The inverted arch short side wall formwork is provided with an opening on the first forming surface, and the first end of the telescopic rod can pass through the opening and extend to the bottom of the first forming surface.

7. The tunnel construction auxiliary trolley according to claim 6, characterized in that: The lifting unit also includes a roller connected to the first end of the telescopic rod. The telescopic rod can drive the roller to pass through the opening in the inverted arch short side wall formwork and extend to the bottom of the first forming surface.

8. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The door frame is provided with a bracket and a counterweight block, the bracket is connected to the door frame, and the counterweight block is placed in the bracket.

9. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The driving mechanism comprises: a first driving assembly, the first driving assembly comprising a first hydraulic telescopic rod, a guide rail assembly and a sliding frame, the first hydraulic telescopic rod being mounted on the main beam assembly, the guide rail assembly being connected between the main beam assembly and the sliding frame, the guide rail assembly being parallel to the first direction, and the first hydraulic telescopic rod being able to drive the sliding frame to move in the first direction; The second driving assembly comprises a second hydraulic telescopic rod, the second hydraulic telescopic rod is connected between the sliding frame and the inverted arch end mold, and the second hydraulic telescopic rod can drive the inverted arch end mold to move in the height direction.

10. The tunnel construction auxiliary trolley according to any one of claims 1 to 9, characterized in that: The frame further comprises two groups of tie rods, one group of tie rods is respectively connected to one of the inverted arch short side wall templates and the portal frame, and the tie rods are located above the inverted arch short side wall templates; The traveling system further comprises a driving unit, and the driving unit drives the traveling wheels of the traveling wheel set to rotate.

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