An auxiliary trolley for tunnel construction

Abstract

The present invention provides a tunnel construction auxiliary trolley, which includes a frame, two invert low sidewall formworks and a formwork unit. The frame has two sets of main beam groups extending along a first direction, and one invert low sidewall formwork is installed on one set of main beam groups. The invert low sidewall formwork has a first forming surface. The formwork unit includes an airbag, an invert filling end formwork and an air pump. The airbag is installed between the two invert low sidewall formworks, and both ends of the airbag are respectively connected to the extending ends of the main beam groups and the invert filling end formwork. The invert filling end formwork is slidably connected to the two invert low sidewall formworks respectively. The air pump can inflate or deflate the airbag. In the deployed position of the airbag, the invert filling end formwork is located at the gantry, the airbag is adjacent to the two invert low sidewall formworks, and the bottom surface of the airbag forms a second forming surface that forms an invert shaping surface with the first forming surface. In the retracted position of the airbag, the invert filling end formwork is located at the extending ends of the main beam groups; the structure of this tunnel construction auxiliary trolley is simple and the operation is convenient.

Description

Technical Field

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

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

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

[0004] At present, there are mainly two types of tooling equipment used for the layered casting 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 the 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 of using the construction trolley is much higher than that of 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. 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, and light weight.

[0006] To achieve the main object of the present invention, the present invention provides a tunnel construction auxiliary trolley, which includes a frame, a traveling system, two invert low sidewall formworks, and a formwork unit. The frame includes a gantry and two groups of main beam groups. The two groups 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 invert low sidewall formwork is installed on one group of main beam groups, and the invert low sidewall formwork extends along the first direction. The invert low sidewall formwork has a first forming surface. The formwork unit includes an airbag, an invert filling end formwork, and an air pump. The airbag is installed between the two invert low sidewall formworks. The first end of the airbag is fixed to the extended end of the main beam group, and the second end of the airbag is fixedly connected to the invert filling end formwork. The invert filling end formwork is slidably connected to the two invert low sidewall 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 invert filling end formwork is located at the gantry, the airbag is adjacent to the two invert low sidewall formworks, and the bottom surface of the airbag forms a second forming surface. The second forming surface and the first forming surface form an invert shaping surface. In the retracted position of the airbag, the invert filling end formwork is located at the extended end of the main beam group.

[0007] As can be seen from the above, 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. When pouring the inverted arch is required, after moving the tunnel construction auxiliary trolley to the designated position, install the inverted arch end form at the extending end of the main beam group, and control the air pump to inflate the airbag, so that the airbag unfolds and forces the inverted arch filling end form to move to the first design position (such as adjacent to the already poured inverted arch filling), and the airbag will bulge to the designed shape under the action of the air pump, so as to jointly enclose the inverted arch cavity with the two inverted arch side wall forms and the primary support, so that when the concrete is injected into the inverted arch cavity, the inverted arch is formed; when the concrete of the inverted arch reaches the initial setting, control the air pump to extract air from the airbag, so that the airbag collapses, and move the inverted arch filling end form to the second design position (such as the end of the inverted arch after initial setting) towards the extending end of the main beam group, so that the inverted arch filling end form, the two inverted arch side wall forms and the inverted arch jointly enclose the inverted arch filling cavity, and then inject concrete into the inverted arch filling cavity to form the inverted arch filling. Furthermore, 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, so as to play a role in temporary drainage during the tunnel construction process; in addition, by designing the template unit, the template unit can not only assist in the forming of the inverted arch and does not require workers to manually install the middle arc template of the inverted arch, 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.

[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 respectively tangent to the two first forming surfaces.

[0009] As can be seen from the above, the above design enables the curvature of the top surface of the inverted arch to meet the design requirements after the inverted arch is formed, and ensures that the mechanical properties of the inverted arch 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, it can not only ensure the flatness of the second forming surface to improve the forming quality and forming accuracy of the inverted arch, but also enable the airbag to deflate and collapse quickly.

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

[0013] As can be seen from the above, the above design enables the pulley module to drive the invert filling end form to move along the guiding component, enabling the invert filling end form to move reliably and quickly between the first design position and the second design position, and assisting the airbag to deploy and retract.

[0014] A further solution is that the guiding component 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 extending direction of the guide rail, the invert filling end form, the gear set and the motor are all installed on the pulley, the gear set meshes with the rack, and the motor can drive the gear set to transmit.

[0015] As can be seen from the above, the above structural design can prevent the pulley module from slipping during the process of driving the invert filling end form to move, enabling the invert filling end form to move reliably and smoothly between the first design position and the second design position, and ensuring that the invert filling form can accurately move to the first design position or the second 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 an invert sidewall form. The jacking unit includes a telescopic rod, and the telescopic rod is parallel to the height direction of the vehicle frame. The invert sidewall form 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 invert sidewall form to be demoulded when the concrete strength of the invert 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 the invert sidewall form and extend below the first forming surface.

[0019] As can be seen from the above, setting the roller on the telescopic rod reduces the friction force suffered by the tunnel construction auxiliary trolley during the forward movement, and better prevents the invert sidewall form from bruising or damaging the invert and / or the invert filling during the forward movement of the tunnel construction auxiliary trolley, thereby playing a protective role for the invert and the invert filling.

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

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

[0022] Another preferred solution is that the tunnel construction auxiliary trolley further includes legs, which are installed at the bottom of the main beam group. The main beam group is located at the bottom of the gantry, and the legs are telescopic legs.

[0023] 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.

[0024] A further solution is that the 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 groups are located above the inverted arch low side wall formwork. The traveling system further includes a driving unit, and the driving unit drives the traveling wheels of the traveling wheel group to rotate.

[0025] As can be seen from the above, the setting of the tie rod groups makes the main beam group in a suspended state relative to the gantry, which not only ensures the overall stability of the 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the first embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0027] Figure 2 It is a schematic structural diagram of the second embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0028] Figure 3 It is the first construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the airbag of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0030] Figure 5 is Figure 3 The enlarged view of part A in

[0031] Figure 6 It is a schematic structural diagram of the trolley module of the embodiment of the tunnel auxiliary construction trolley of the present invention with some components omitted.

[0032] Figure 7 is Figure 3 The enlarged view of part B in

[0033] Figure 8 It is the first construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention from another perspective.

[0034] Figure 9It is the second construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0035] Figure 10 It is the second construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention from another perspective.

[0036] Figure 11 It is the third construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0037] Figure 12 It is the fourth construction state reference diagram of the embodiment of the tunnel auxiliary construction trolley of the present invention.

[0038] The present invention will be further described below in conjunction with the drawings and embodiments. Specific embodiments

[0039] Embodiment of the tunnel construction auxiliary trolley

[0040] Refer to Figure 1 and Figure 2 In the process of tunnel construction, the tunnel construction auxiliary trolley 100 is used to cooperate with the existing mechanism to form the invert and invert filling of the tunnel. The tunnel construction auxiliary trolley 100 includes a frame 1, a traveling system 2, an invert low side wall formwork 3, a formwork unit 4, a jacking unit 5 and legs 6.

[0041] 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 from the gantry 11 towards the outside of 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.

[0042] 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 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 group. The second motor 221 is installed on the gantry 11. The sprocket group 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. 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.

[0043] There are two invert sidewall formworks 3, and the two invert sidewall formworks 3 are arranged in approximate mirror symmetry, and one invert sidewall formwork 3 is fixedly installed on a set of main beam groups 12. The invert sidewall formwork 3 is used to cooperate with the primary support structure 105 and the formwork unit 4 to form the invert, and the invert sidewall formwork 3 is also used to cooperate with the invert and the formwork unit 4 to form the invert filling. Among them, the invert sidewall formwork 3 extends along the first direction, and the invert sidewall formwork 3 has a first forming surface 31 and a third forming surface 32.

[0044] The first forming surface 31 is arranged in a substantially arc shape, and 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 sidewall part. Of course, the first forming surface 31 can also be set as two intersecting but non-tangent arc surfaces according to 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 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 design requirements, and the intersection of the two planes is arranged in a bent shape.

[0045] The third forming surface 32 is used to cooperate with the invert and the formwork unit 4 to form the invert filling. The third forming surface 32 is a plane, and the third forming surface 32 is preferably perpendicular to the placement surface of the tunnel construction auxiliary trolley 100, that is, when the above placement surface is a horizontal plane, the third forming surface 32 is a vertical plane.

[0046] Combined Figure 5 , a guiding component 33 is arranged on the third forming surface 32. In this embodiment, the guiding component 33 includes a guide rail 331 and a rack 332. The guide rail 331 and the rack 332 both 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.

[0047] 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 invert sidewall formwork 3 can be minimized as much as possible, thereby better reducing the overall weight of the tunnel construction auxiliary trolley 100. Further, a set of main beam groups 12 passes through a corresponding invert sidewall 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 invert sidewall formwork 3.

[0048] The number of tie rod groups 13 of the vehicle frame 1 is two groups. The two tie rod groups 13 correspond to two inverted arch side wall formworks one by one. 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.

[0049] Combined with Figure 3 and Figure 4 , the 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 in the first direction, and each inflation chamber 411 has a ventilation port 4111.

[0050] The inverted arch filling end form 42 is connected to the guiding component 33 through the trolley module 44, so that the trolley module 44 can drive the inverted arch filling end form 42 to slide relative to the two inverted arch side wall formworks 3 in the first direction respectively. The number of the trolley modules 44 is two. One trolley module 44 is connected between the first end of the inverted arch filling end form 42 and a group of guiding components 33. Preferably, the two trolley modules 44 can simultaneously drive the inverted arch filling end to slide along the guiding component 33, so that the inverted arch filling end form 42 can move reliably and quickly between the first design position and the second design position, and assist the cylinder to expand and retract. Among them, as Figure 8 shown, the first design position refers to the position where the inverted arch filling end form 42 moves to the limit position in the first direction towards the gantry 11. For example, in the first design position, the inverted arch filling end form 42 can be adjacent to the formed inverted arch filling 101; as Figure 11 shown, the second design position refers to the position where the inverted arch filling end form 42 moves to the limit position in the first direction towards the connecting plate 43. For example, in the second design position, the inverted arch filling end form 42 is located at the end face of the freshly poured and initially set inverted arch 104 to cooperate with the freshly poured and initially set inverted arch 104 and the third forming surface 32 of the two inverted arch side wall formworks 3 to form the to-be-poured inverted arch filling.

[0051] 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 in pairs. The first gear 4421 and the second gear 4422 are both 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 guide 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 guide assembly 33 can be improved, and the torque received by the entire 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 guide 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 first design position and the second design position, and it is ensured that the invert filling end form 42 can accurately move to the first design position and the second design position.

[0052] The air pump is respectively communicated with the air exchange ports 4111 of each inflatable cavity 411 through a 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 deployed or retracted in the first direction. Preferably, the connecting pipe 45 is made of a flexible hose.

[0053] 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 first design 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, the curvature of the invert top surface can meet the design requirements after the invert is formed, so as to ensure that the mechanical properties of the invert meet the design requirements.

[0054] 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 second design 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.

[0055] Since the airbag 41 is light in weight and strong in 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. Moreover, 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 72, and auxiliary equipment (such as excavators, loaders, etc.) is extremely vulnerable to interference from the trestle 72, 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 lightweight design of the tunnel construction auxiliary trolley 100 can be maximally realized.

[0056] 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 inverted arch low side wall formwork 3 to resist the upward buoyancy force generated by the concrete on the airbag 41 during the pouring of the inverted arch, and the counterweight 112 can eliminate the influence of the weights of the main beam group 12 and the inverted arch low side wall formwork 3 on the tunnel construction auxiliary trolley 100, thereby preventing the tunnel construction auxiliary trolley 100 from tipping over.

[0057] 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 inverted arch 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 inverted arch 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 rollers 52 thereon to pass through the corresponding opening from inside the inverted arch low side wall formwork 3 and extend below the first forming surface 31 through its first end.

[0058] Preferably, the telescopic rod 51 is a hydraulic telescopic rod. Because the compressibility of the liquid is poor, using the 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 auxiliary inverted arch low side wall formwork 3 to be demoulded after the concrete of the inverted arch 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 rod 51, so that the frictional force received by the tunnel construction auxiliary trolley 100 during the forward movement is smaller, and it can better prevent the inverted arch low side wall formwork 3 from being bruised or damaged to the inverted arch and / or the inverted arch filling during the forward movement of the tunnel construction auxiliary trolley 100, thereby playing a protective role in the inverted arch and the inverted arch filling.

[0059] The outrigger 6 is installed at the bottom of the main beam group 12, and the outrigger 6 preferably adopts a telescopic outrigger 6 with a mechanical structure (such as a threaded structure). After the tunnel construction auxiliary trolley 100 moves to the designated position, the outrigger 6 can support between the main beam group 12 and the ground to prevent the tunnel construction auxiliary trolley 100 from tipping over during operation. Using a telescopic outrigger 6 with a mechanical structure as the outrigger 6 can improve the reliability of the outrigger 6 in supporting the overall tunnel construction auxiliary trolley 100.

[0060] The following briefly describes the working process of the tunnel construction auxiliary trolley 100 in combination with Figures 1 to 12 :

[0061] 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 inverted arch low side wall formwork 3 to appropriately lift the inverted arch low side wall formwork 3. When the tunnel construction auxiliary trolley 100 is currently at the position where the inverted arch and the inverted arch filling have been poured, the lifting unit 5 can demold the inverted arch low side wall formwork 3 from the inverted arch and the inverted arch filling.

[0062] 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 outrigger 6 is controlled to extend so that the outrigger 6 supports between the primary support structure 105 and the main beam group 12 to prevent the tunnel construction auxiliary trolley 100 from tipping over.

[0063] Next, the lifting unit 5 is controlled to drive the roller 52 to retract into the inverted arch low side wall formwork 3 by the telescopic rod 51 to ensure that the inverted arch low side wall formwork 3 is in the third design position; subsequently, the opening on the inverted arch low side wall formwork 3 is closed with tape or a geotextile is used to pad between the opening and the roller 52 to close the opening and prevent concrete from entering the inside of the inverted arch low side wall formwork 3 during the inverted arch pouring process.

[0064] Next, the position of the tunnel construction auxiliary trolley 100 is finely adjusted to ensure the position accuracy of each formwork unit 4; subsequently, the inverted arch end form 71 is installed at the bottom of the main beam group 12 and near the extended end of the main beam group 12, and the position of the inverted arch end form 71 is adjusted. Among them, the inverted arch end form 71 is located between the outrigger 6 and the gantry 11.

[0065] Next, the trestle 72 is erected so that the two ends of the trestle 72 are respectively adjacent to the formed inverted arch filling 101 and the section to be excavated 102. The trestle 72 can provide a temporary driving passage during the inverted arch and inverted arch filling process.

[0066] Next, as Figure 3 and Figure 8As shown, the air pump of the control template unit 4 re-inflates the airbag 41, and at the same time, the trolley module 44 synchronously controls the invert filling end form 42 to move towards the first designed position until the invert filling end form 42 reaches the first designed position; subsequently, the current position of the trolley module 44 is locked. When the invert filling end form 42 reaches the first designed position, the invert filling end form 42 abuts against the previously formed invert filling 101 of the previous section; when the airbag 41 is inflated to the deployed position, the airbag 41 abuts against the third formed surfaces 32 of the two invert sidewall forms 3 respectively, and the second formed surface 412 formed by the bottom surface of the airbag 41 is tangent to the first formed surfaces 31 of the two invert sidewall forms 3 respectively, so as to form an invert cavity 103 among the airbag 41, the formed invert 108, the two invert sidewall forms 3, and the primary support structure 105.

[0067] Next, as Figure 9 and Figure 10 shown, concrete is injected into the invert cavity 103 to form the invert 104. When pouring the concrete of the invert 104, an opening is formed between the invert sidewall form 3 and the primary support structure 105 through a chute, so that the concrete automatically fills the invert cavity 103; subsequently, a vibrator can be used to vibrate the concrete at the opening formed between the invert sidewall form 3 and the primary support structure 105 to make the concrete compacted.

[0068] Next, as Figure 11 shown, when the pouring of the invert 104 is completed and reaches the initial setting, the air pump of the template unit 4 evacuates the airbag 41, and at the same time, the trolley module 44 synchronously controls the invert filling end form 42 to move towards the second designed position until the invert filling end form 42 reaches the second designed position, and the airbag 41 is retracted; subsequently, the current position of the trolley module 44 is locked. When the invert filling end form 42 reaches the second designed position, the invert filling end form 42 is just located at the end of the newly formed invert 104, and an invert filling cavity 106 is formed among the invert filling end form 42, the third formed surfaces 32 of the two tunnel sidewall forms, the previously formed invert filling 101, and the newly formed invert 104.

[0069] Next, as Figure 12 shown, concrete is injected into the invert filling cavity 106 to the designed elevation to form the invert filling 107; a vibrator can be used to vibrate the concrete during the pouring of the invert filling 107 to make the concrete compacted. Among them, when pouring the concrete of the invert 104 and the invert filling 107, the concrete mixer truck can drive onto the trestle 72.

[0070] Next, when the concrete strength of the freshly formed inverted arch filling 107 reaches the forming requirement, the end formwork 71 of the inverted arch is removed. Subsequently, the telescopic rod 51 of the lifting unit 5 controls the roller 52 thereon to extend out again below the second forming surface 412 of the inverted arch low sidewall formwork 3, 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.

[0071] 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 to be constructed.

[0072] It should be noted that since the end formwork 71 of the inverted arch is heavy, in order to reduce the overall weight of the tunnel construction auxiliary trolley 100 and facilitate the demoulding treatment of the end formwork 71 of the inverted arch, the end formwork 71 of the inverted arch is arranged to be detachably connected to the vehicle frame 1. Therefore, as other embodiments, the end formwork 71 of the inverted arch can also be fixedly connected to the vehicle frame 1 without secondary disassembly and assembly during construction.

[0073] In summary, the tunnel auxiliary construction trolley can assist the formation 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. Furthermore, 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 formwork unit, the formwork unit can not only assist in the formation of the inverted arch and eliminate the need for workers to manually install the middle arc formwork of the inverted arch, 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.

[0074] 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, Comprising: A vehicle frame, the vehicle frame includes a gantry and two groups of main beam groups, the two groups of main beam groups are installed on the gantry, and the main beam groups extend along a first direction; A traveling system, the traveling system includes traveling wheel groups, and the traveling wheel groups are installed at the bottom of the gantry; Two inverted arch side wall templates, one inverted arch side wall template is installed on one group of main beam groups, the inverted arch side wall template extends along the first direction, and the inverted arch side wall template has a first forming surface; A template unit, the template unit includes an airbag, an inverted arch filling end form, and an air pump, the airbag is installed between the two inverted arch side wall templates, the first end of the airbag is fixed at the extended end of the main beam group, the second end of the airbag is fixedly connected to the inverted arch filling end form, the inverted arch filling end form is slidably connected to the two inverted arch side wall templates respectively in the first direction, the air pump can inflate or deflate the airbag, the airbag can be deployed or retracted in the first direction, in the deployed position of the airbag, the inverted arch filling end form is located at the gantry, the airbag is adjacent to the two inverted arch side wall templates, 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 form is located at the extended end of the main beam group; 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; 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; A set of guiding components is arranged on one surface of each inverted arch side wall template facing the template unit, and the guiding components extend along the first direction; The template unit further includes two trolley modules, one trolley module is connected between one end of the inverted arch filling end form and a set of guiding components, and at least one trolley module can drive the inverted arch filling end form to slide along the guiding components; The guiding components include guide rails and racks; The trolley module includes a trolley, a gear set and a motor, the trolley is slidably connected to the guide rail along the extending direction of the guide rail, the inverted arch filling end form, 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.

2. The auxiliary trolley for tunnel construction according to claim 1, wherein: The auxiliary trolley for tunnel construction further includes two groups of jacking units, one group of jacking units is installed in one inverted arch side wall template, the jacking unit includes a telescopic rod, and the telescopic rod is parallel to the height direction of the vehicle frame; The inverted arch side wall template 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.

3. The auxiliary trolley for tunnel construction according to claim 2, wherein: The jacking unit further includes rollers, which are connected to the first end of the telescopic rod. The telescopic rod can drive the rollers to pass through the opening from within the inverted arch sidewall formwork and extend below the first forming surface.

4. The tunnel construction auxiliary trolley according to claim 1, characterized in that: A support and a counterweight are provided on the gantry. The support is connected to the gantry, and the counterweight is placed within the support.

5. The tunnel construction auxiliary trolley according to claim 1, characterized in that: The tunnel construction auxiliary trolley further includes legs, which 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.

6. The tunnel construction auxiliary trolley according to any one of claims 1 to 5, characterized in that: The vehicle frame further includes two sets of tie rod groups. One set of tie rod groups is respectively connected to one of the inverted arch sidewall formworks and the gantry, and the tie rod group is located above the inverted arch sidewall formwork; The traveling system further includes a driving unit, which drives the traveling wheels of the traveling wheel group to rotate.

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