Secondary lining trolley for tunnel construction

Abstract

The invention relates to the field of tunnel construction equipment, in particular to a secondary lining trolley for tunnel construction. The secondary lining trolley comprises a portal frame, a formwork mechanism, a position correcting mechanism, a ventilation and dust removal system and a grouting system, the formwork mechanism is composed of an inner circular arch formwork base, an outer circular arch steel formwork and an arch-shaped wood formwork, and dynamic sealing connection is achieved through a dovetail sliding rail and a sliding groove; the position correcting mechanism is used for adjusting the relative position of the portal and the tunnel. The ventilation and dust removal system ensures the cleanness of the surface of the position correcting mechanism and air circulation in the tunnel; and the grouting system is used for injecting concrete into the arched wood mold. The construction method achieves the effects of improving the construction efficiency, ensuring the construction quality and reducing the environmental pollution.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction equipment, and particularly to a secondary lining trolley for tunnel construction. Background Art

[0002] Tunnel construction is an important part of modern transportation infrastructure construction, especially in mountainous areas and urban underground projects. With the continuous expansion of the scale of tunnel projects and the progress of technology, the secondary lining trolley, as an important construction equipment, is widely used in the secondary lining operation of tunnels. The main function of the secondary lining trolley is to form a strong permanent support structure through template fixation and concrete pouring after the primary support of the tunnel is completed. This not only improves the safety and stability of the tunnel, but also greatly shortens the construction period and reduces the construction cost.

[0003] In the related art, when the secondary lining trolley is working, it usually drives the secondary lining trolley into the construction position of the tunnel, builds a steel bar structure and a wooden formwork between the steel formwork of the secondary lining trolley and the tunnel. The steel bar structure is located inside the wooden formwork, and the wooden formwork is used to seal the area between the steel formwork and the tunnel to form a sealing structure. Then, concrete is injected into the wooden formwork through the working window on the steel formwork until the wooden formwork is filled, and then the steel formwork is lowered to separate from the wooden formwork. Next, the secondary lining trolley drives into the next construction position of the tunnel, rebuilds the wooden formwork between the steel formwork and the tunnel, and conducts the construction of the next section of the tunnel. Among them, the wooden formwork is separated from the tunnel after the concrete inside it solidifies.

[0004] Aiming at the above related art, there are the following defects: the size of the steel formwork of the current secondary lining trolley is fixed. When tunnels of different sizes need to be constructed, different-sized secondary lining trolleys need to be replaced, which increases the construction cost. Summary of the Invention

[0005] In order to enable the secondary lining trolley to construct tunnels of different sizes, the present application provides a secondary lining trolley for tunnel construction.

[0006] The secondary lining trolley for tunnel construction provided by the present application adopts the following technical solutions: A secondary lining trolley for tunnel construction, comprising a gantry, a formwork mechanism, an alignment mechanism, a ventilation and dust removal system, and a grouting system. The formwork mechanism includes an inner circular arch formwork base, an outer circular arch steel formwork, and an arched wooden formwork. The inner circular arch formwork base includes a first circular arch base plate and two second circular arch base plates. The axes of the first circular arch base plate and the second circular arch base plates are both horizontally arranged along the length direction of the gantry. The first circular arch base plate is arranged above the gantry, and the inner wall of the first circular arch base plate is connected to the gantry. The two second circular arch base plates are symmetrically arranged below the first circular arch base plate. In the width direction of the gantry, the two second circular arch base plates are respectively hinged to the two ends of the first circular arch base plate. The outer circular arch steel formwork includes a first circular arch steel formwork plate and two second circular arch steel formwork plates. The circular arch steel formwork plates are detachably installed on the outer wall of the first circular arch base plate coaxially. The two second circular arch steel formwork plates are arranged corresponding to the two second circular arch base plates. The second circular arch steel formwork plates are detachably installed on the outer walls of the corresponding second circular arch base plates coaxially. The arched wooden formwork is installed on the outer wall of the outer circular arch steel formwork. The alignment mechanism is installed on the gantry and is used to adjust the relative position between the gantry and the tunnel. The ventilation and dust removal system is installed on the gantry and is used for dust removal on the surface of the alignment mechanism and internal ventilation of the tunnel. The grouting system is installed on the gantry and is used to inject concrete into the interior of the arched wooden formwork.

[0007] By adopting the above technical solutions, the gantry serves as the main support structure of the entire secondary lining trolley, ensuring the overall stability and safety of the equipment, and facilitating the installation and operation of other functional modules. The detachable installation of the first circular arch steel formwork plate and the two second circular arch steel formwork plates enables the selection of first circular arch steel formwork plates and two second circular arch steel formwork plates with appropriate thicknesses according to the actual construction requirements of the tunnel and installing them at the corresponding positions on the inner circular arch formwork base, improving the adaptability of the secondary lining trolley and enabling the secondary lining trolley to meet the construction requirements of tunnels with different diameters, reducing the construction cost. The setting of the alignment mechanism can accurately adjust the relative position between the gantry and the tunnel, ensuring the construction accuracy. The introduction of the ventilation and dust removal system not only effectively removes the dust on the surface of the alignment mechanism, reducing the wear of the alignment mechanism, but also improves the air quality inside the tunnel, ensuring the health of construction workers. The grouting system can inject concrete into the interior of the arched wooden formwork. After the concrete solidifies inside the arched wooden formwork, a support structure inside the tunnel is formed. In this application, the secondary lining trolley can meet the construction requirements of tunnels with different diameters, improve the adaptability of the secondary lining trolley, and reduce the construction cost.

[0008] Preferably, a first dovetail slide rail is provided on the outer wall of the first arched substrate along the axial direction of the first arched substrate, and a first dovetail chute is provided on the inner wall of the first arched steel form along the axial direction of the first arched steel form, and the first dovetail slide rail is arranged in the first dovetail chute; a second dovetail slide rail is provided on the outer wall of the second arched substrate along the axial direction of the second arched substrate, and a second dovetail chute is provided on the inner wall of the second arched steel form along the axial direction of the second arched steel form, and the second dovetail slide rail is arranged in the second dovetail chute.

[0009] By adopting the above technical solution, the first dovetail slide rail and the first dovetail chute between the first arched substrate and the first arched steel form, and the second dovetail slide rail and the second dovetail chute between the second arched substrate and the second arched steel form enable the arched steel form to slide stably along the axial direction of the arched substrate, improving the assembly and disassembly efficiency of the formwork, and at the same time ensuring the positioning accuracy and stability of the formwork.

[0010] Preferably, the first arched steel form is movably and sealingly connected to the first arched substrate in the axial direction of the first arched substrate; the second arched steel form is movably and sealingly connected to the second arched substrate in the axial direction of the second arched substrate.

[0011] By adopting the above technical solution, the first arched steel form is movably and sealingly connected to the first arched substrate in the axial direction of the first arched substrate, and the second arched steel form is movably and sealingly connected to the second arched substrate in the axial direction of the second arched substrate, which can effectively prevent the leakage of concrete during pouring and ensure the construction quality. At the same time, this movably sealing connection method can also improve the stability and service life of the formwork and reduce the maintenance cost.

[0012] Preferably, the lengths of the first arched substrate, the second arched substrate, the first arched steel form and the second arched steel form are equal; the lengths of the first dovetail slide rail, the first dovetail chute, the second dovetail slide rail and the second dovetail chute are equal and are all smaller than the length of the first arched substrate; the first ends of the first arched substrate, the second arched substrate, the first arched steel form, the second arched steel form, the first dovetail slide rail, the first dovetail chute, the second dovetail slide rail and the second dovetail chute are coplanar in the vertical plane.

[0013] By adopting the above technical solution, the sliding range of the first dovetail chute is restricted, so that the first dovetail slide rail stops sliding to the middle of the first circular arch steel formwork, so as to realize the mutual limit of the first circular arch steel formwork and the first circular arch base plate in the length direction of the first circular arch base plate. The sliding range of the second dovetail chute is restricted, so that the second dovetail slide rail stops sliding to the middle of the second circular arch steel formwork, so as to realize the mutual limit of the second circular arch steel formwork and the second circular arch base plate in the length direction of the second circular arch base plate.

[0014] Preferably, the alignment mechanism includes two vertical displacement components and two walking components. In the width direction of the gantry, the two vertical displacement components are distributed at intervals. The vertical displacement component includes a plurality of lifting members distributed along the length direction of the gantry. The lifting members are arranged below the gantry and one end of each lifting member is connected to the bottom end of the gantry. The two walking components are arranged corresponding to the two vertical displacement components. The walking components are arranged below the corresponding vertical displacement components and are connected to the end of the lifting member far away from the gantry. The walking components are used to drive the gantry to move along the length direction of the gantry.

[0015] By adopting the above technical solution, precise adjustment and stable movement of the secondary lining trolley during alignment can be achieved. Specifically, the arrangement of the two vertical displacement components and the two walking components enables the gantry to maintain balance in the width direction. At the same time, through the multi-point support of the lifting members, the stability of the gantry at different heights is ensured. The arrangement of the walking components enables the gantry to move smoothly along the length direction of the tunnel, improving the construction efficiency. In addition, the combined use of the vertical displacement components and the walking components can also effectively reduce the errors caused by uneven ground during construction, ensuring the overall performance of the secondary lining trolley.

[0016] Preferably, the walking component includes a walking slide rail and a plurality of walking sliders. The walking slide rail is arranged along the length direction of the gantry. The plurality of walking sliders are arranged corresponding to the plurality of lifting members, and the walking sliders are connected to the corresponding lifting members.

[0017] By adopting the above technical solution, a plurality of walking sliders can provide multi-point support for the gantry, enabling the gantry to move smoothly along the length direction of the tunnel.

[0018] Preferably, a horizontal displacement component is connected between the walking slider and the corresponding lifting member. The horizontal displacement component includes an alignment slide rail and an alignment slider. The alignment slide rail is installed on the walking slider along the width direction of the gantry. One end of the alignment slider is slidably connected to the alignment slide rail, and the other end is connected to the lifting member.

[0019] By adopting the above technical solution, the introduction of the horizontal displacement component enables the walking slider to adjust its position in the width direction of the gantry, thereby accurately controlling the distance between the gantry and the tunnel wall and ensuring the accurate alignment of the formwork mechanism.

[0020] Preferably, the ventilation and dust removal system includes a first blower, an air inlet pipe, a spray head, a dust collector and a dust suction hood. The first blower and the dust collector are both installed on the gantry fan. One end of the air inlet pipe is connected to the air inlet end of the first blower, and the other end is used to extend outside the tunnel. The spray head is installed directly above the alignment mechanism, and the air outlet of the spray head faces the alignment mechanism. The air inlet of the spray head is connected to the air outlet end of the first blower. The dust suction hood is arranged on the side of the alignment mechanism and is connected to the dust collector.

[0021] By adopting the above technical solution, the combined use of the first blower and the air inlet pipe can introduce fresh air into the tunnel, increase the oxygen content in the tunnel and reduce the concentration of harmful gases, thereby protecting the physical health of construction workers. At the same time, the setting of the spray head can blow the alignment mechanism to prevent dust and impurities from adhering to the surface of the alignment mechanism and affecting the normal operation of the equipment. The combined use of the dust collector and the dust suction hood can timely collect the dust and other particulate matters generated during the construction process, reduce environmental pollution and keep the construction site clean.

[0022] Preferably, a plurality of inner working windows are provided on the inner wall of the second circular arch base plate, and a plurality of outer working windows corresponding to the plurality of inner working windows one by one are provided on the inner wall of the first circular arch steel formwork; The grouting system includes a grouting pump, a transfer chamber, a main grouting pipe and a plurality of auxiliary grouting pipes. The grouting pump is arranged on the side of the gantry; The transfer chamber is installed on the gantry. The liquid inlet end of the main grouting pipe is connected to the liquid outlet end of the grouting pump, and the liquid outlet end is connected to the liquid inlet end of the transfer chamber; The liquid inlet ends of the plurality of auxiliary grouting pipes are all connected to the liquid outlet end of the transfer chamber. The plurality of auxiliary grouting pipes are arranged corresponding to the plurality of inner working windows. A coaxial telescopic pipe is installed at the liquid outlet end of each auxiliary grouting pipe; A top grouting pipe is provided at the top of the first circular arch base plate. The liquid outlet end of the top grouting pipe is coplanar with the outer wall of the first circular arch base plate, and the liquid inlet end is arranged inside the first circular arch base plate. The first circular arch steel formwork is first provided with a top grouting hole coaxially communicated with the top grouting pipe. One end of the top grouting pipe far from the first circular arch base plate is used to be connected to the liquid outlet end of the transfer chamber.

[0023] By adopting the above technical solutions, the design of multiple inner working windows and outer working windows makes the grouting operation more convenient and improves work efficiency. The combined use of the grouting pump, transfer chamber, main grout pipe, secondary grout pipe and telescopic pipe in the grouting system enables the telescopic pipe to extend into the interior of the arched wooden formwork after passing through the inner working window and the outer working window in sequence when grouting is required, ensuring that the concrete can be evenly and efficiently injected into the interior of the arched wooden formwork, and improving the grouting quality and construction efficiency. Through the arrangement of the top grout pipe and the top grout hole, grouting can be carried out into the arched wooden formwork from the top of the arched wooden formwork, so that there are no areas prone to grout leakage inside the arched wooden formwork.

[0024] Preferably, a water tank is provided directly below the plurality of telescopic pipes. The water tank is connected to the gantry or the second circular arch base plate and is used to receive the fluid ejected from the telescopic pipes. A sewage pump is installed at the bottom of the water tank, and a sewage pipe is installed at the water outlet end of the sewage pump.

[0025] By adopting the above technical solutions, when water is injected into the water tank and grouting is paused, the telescopic pipe contracts to a position directly above the water tank inside the inner circular arch formwork base. At this time, the telescopic pipe has just completed grouting, and the concrete at the grout outlet of the telescopic pipe just drips into the water tank. The water in the water tank can ensure that the dripping concrete does not solidify in the water tank, thus keeping the construction site clean.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting an adjustable formwork mechanism, the present application can adapt to the construction requirements of tunnels of different sizes, eliminating the need to frequently replace second lining trolleys of different sizes, and significantly reducing construction costs. 2. By setting up a ventilation and dust removal system, the present application effectively improves the air quality in the tunnel, reduces the dust generated during construction, and enhances the safety and comfort of the construction environment. 3. Through the optimized design of the grouting system, the present application makes the injection of concrete more uniform and efficient, ensuring the quality and construction efficiency of the tunnel secondary lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application located in the tunnel; Figure 2 is an exploded structural diagram of the inner circular arch formwork base and the outer circular arch steel form; Figure 3 It is a schematic structural diagram after removing the arched wooden formwork in the embodiment of the present application; Figure 4 It is a schematic combined structural diagram of a gantry, an alignment mechanism, a ventilation and dust removal system, and a grouting system.

[0029] Reference signs: 1. Gantry; 2. Formwork mechanism; 21. Inner circular arch formwork base; 211. First circular arch base plate; 2111. First dovetail slide rail; 2112. Top grouting pipe; 212. Second circular arch base plate; 2121. Second dovetail slide rail; 2122. Inner working window; 22. Outer circular arch steel formwork; 221. First circular arch steel formwork; 22101. First dovetail chute; 22102. Top grouting hole; 222. Second circular arch steel formwork; 22201. Second dovetail chute; 2221. Outer working window; 23. Arched wooden formwork; 3. Alignment mechanism; 31. Vertical displacement component; 311. Lifting member; 32. Horizontal displacement component; 321. Alignment slide rail; 322. Alignment slider; 33. Traveling component; 331. Traveling slide rail; 332. Traveling slider; 4. Ventilation and dust removal system; 41. First fan; 42. Air inlet pipe; 43. Sprayer; 44. Dust collector; 45. Dust suction hood; 5. Grouting system; 51. Grouting pump; 52. Transfer chamber; 53. Main grout outlet pipe; 54. Auxiliary grout outlet pipe; 55. Telescopic pipe; 6. Water tank; 61. Sewage pump; 62. Sewage pipe; 7. Tunnel. Detailed implementation manners

[0030] The following further elaborates on the present application in conjunction with the attached Figures 1 - 4 for a more detailed description.

[0031] The embodiment of the present application discloses a secondary lining trolley for tunnel construction. Refer to Figure 1 , Figure 2 and Figure 3, A secondary lining trolley for tunnel construction, comprising a gantry 1, a formwork mechanism 2, an alignment mechanism 3, a ventilation and dust removal system 4 and a grouting system 5. The formwork mechanism 2 includes an inner circular arch formwork base 21, an outer circular arch steel form 22 and an arched wooden form 23. The inner circular arch formwork base 21 includes a first circular arch base plate 211 and two second circular arch base plates 212. The axes of the first circular arch base plate 211 and the second circular arch base plates 212 are both horizontally arranged along the length direction of the gantry 1. The first circular arch base plate 211 is arranged above the gantry 1, and the inner wall of the first circular arch base plate 211 is connected to the gantry 1. The two second circular arch base plates 212 are symmetrically arranged below the first circular arch base plate 211. In the width direction of the gantry 1, the two second circular arch base plates 212 are respectively hinged to the two ends of the first circular arch base plate 211. A first hydraulic cylinder is connected between the second circular arch base plate 212 and the gantry 1, and the second circular arch base plate 212 is driven to rotate by the telescopic movement of the first hydraulic cylinder.

[0032] Referring to Figure 1 , Figure 2 and Figure 3 , the outer circular arch steel form 22 includes a first circular arch steel form plate 221 and two second circular arch steel form plates 222. The circular arch steel form plates are coaxially and detachably installed on the outer wall of the first circular arch base plate 211. The two second circular arch steel form plates 222 are arranged corresponding to the two second circular arch base plates 212, and the second circular arch steel form plates 222 are coaxially and detachably installed on the outer walls of the corresponding second circular arch base plates 212. The detachable installation of the first circular arch steel form plate 221 and the two second circular arch steel form plates 222 enables the selection of appropriate thickness of the first circular arch steel form plate 221 and the two second circular arch steel form plates 222 according to the actual construction requirements of the tunnel 7 and installation at the corresponding positions on the inner circular arch formwork base 21, improving the adaptability of the secondary lining trolley, enabling the secondary lining trolley to adapt to the construction requirements of tunnels 7 with different diameters, and reducing the construction cost.

[0033] Referring to Figure 1 , Figure 2 and Figure 3 , the arched wooden form 23 is installed on the outer wall of the outer circular arch steel form 22. The alignment mechanism 3 is installed on the gantry 1 and is used to adjust the relative position between the gantry 1 and the tunnel 7. After the alignment mechanism 3 moves the gantry 1 to the construction area of the tunnel 7 and corrects the relative position between the gantry 1 and the tunnel 7, the arched wooden form 23 is erected between the outer circular arch steel form 22 and the inner wall of the tunnel 7.

[0034] Referring to Figure 1 , Figure 2 and Figure 3, the ventilation and dust removal system 4 is installed on the gantry 1, used for dust removal on the surface of the alignment mechanism 3 and internal ventilation of the tunnel 7. The introduction of the ventilation and dust removal system 4 not only effectively removes the dust on the surface of the alignment mechanism 3, reduces the wear of the alignment mechanism 3, but also improves the air quality in the tunnel 7, ensuring the health of construction workers. The grouting system 5 is installed on the gantry 1, used for injecting concrete into the interior of the arched wooden form 23. The grouting system 5 can inject the concrete into the interior of the arched wooden form 23. After the concrete solidifies inside the arched wooden form 23, a support structure in the tunnel 7 is formed.

[0035] Refer to Figure 1 , Figure 2 and Figure 3 , on the outer wall of the first circular arch base plate 211, there is a first dovetail slide rail 2111 arranged along the axis direction of the first circular arch base plate 211. On the inner wall of the first circular arch steel form 221, there is a first dovetail chute 22101 arranged along the axis direction of the first circular arch steel form 221. The first dovetail slide rail 2111 is arranged inside the first dovetail chute 22101. Through the cooperation between the first dovetail slide rail 2111 and the first dovetail chute 22101, the first circular arch steel form 221 can be slidably connected with the first circular arch base plate 211 in the axis direction of the first circular arch base plate 211, improving the disassembly and assembly efficiency of the first circular arch steel form 221. On the outer wall of the second circular arch base plate 212, there is a second dovetail slide rail 2121 arranged along the axis direction of the second circular arch base plate 212. On the inner wall of the second circular arch steel form 222, there is a second dovetail chute 22201 arranged along the axis direction of the second circular arch steel form 222. The second dovetail slide rail 2121 is arranged inside the second dovetail chute 22201. Through the cooperation between the second dovetail slide rail 2121 and the second dovetail chute 22201, the second circular arch steel form 222 can be slidably connected with the second circular arch base plate 212 in the axis direction of the second circular arch base plate 212, improving the disassembly and assembly efficiency of the second circular arch steel form 222.

[0036] Refer to Figure 1 , Figure 2 and Figure 3 , the first circular arch steel form 221 and the first circular arch base plate 211 are dynamically sealed and connected in the axis direction of the first circular arch base plate 211. The second circular arch steel form 222 and the second circular arch base plate 212 are dynamically sealed and connected in the axis direction of the second circular arch base plate 212. The dynamic sealed connection can effectively prevent the leakage of concrete during the pouring process, ensuring the construction quality. At the same time, this dynamic sealed connection method can also improve the stability and service life of the formwork, reducing the maintenance cost.

[0037] Refer to Figure 1 , Figure 2 and Figure 3, the lengths of the first arched substrate 211, the second arched substrate 212, the first arched steel formwork 221, and the second arched steel formwork 222 are equal. The lengths of the first dovetail slide rail 2111, the first dovetail chute 22101, the second dovetail slide rail 2121, and the second dovetail chute 22201 are equal and are all less than the length of the first arched substrate 211. The first ends of the first arched substrate 211, the second arched substrate 212, the first arched steel formwork 221, the second arched steel formwork 222, the first dovetail slide rail 2111, the first dovetail chute 22101, the second dovetail slide rail 2121, and the first end of the second dovetail chute 22201 are coplanar on the vertical plane.

[0038] Referring to Figure 1 , Figure 2 and Figure 3 , in the embodiment of the present application, the sliding range of the first dovetail chute 22101 is restricted so that the first dovetail slide rail 2111 stops sliding to the middle of the first arched steel formwork 221, so as to realize the mutual limit of the first arched steel formwork 221 and the first arched substrate 211 in the length direction of the first arched substrate 211. The sliding range of the second dovetail chute 22201 is restricted so that the second dovetail slide rail 2121 stops sliding to the middle of the second arched steel formwork 222, so as to realize the mutual limit of the second arched steel formwork 222 and the second arched substrate 212 in the length direction of the second arched substrate 212.

[0039] Referring to Figure 1 , Figure 3 and Figure 4 , the alignment mechanism 3 includes two vertical displacement components 31 and two traveling components 33. In the width direction of the gantry 1, the two vertical displacement components 31 are spaced apart. The vertical displacement component 31 includes a plurality of lifting members 311 distributed along the length direction of the gantry 1. The lifting members 311 are arranged below the gantry 1 and one end is connected to the bottom end of the gantry 1. The two traveling components 33 are correspondingly arranged with the two vertical displacement components 31. The traveling component 33 is arranged below the corresponding vertical displacement component 31 and is connected to the end of the lifting member 311 away from the gantry 1. The traveling component 33 is used to drive the gantry 1 to move along the length direction of the gantry 1.

[0040] Referring to Figure 1 , Figure 3 and Figure 4, in the embodiment of the present application, precise adjustment and stable movement of the secondary lining trolley during alignment can be achieved. Specifically, the setting of the two vertical displacement components 31 and the two traveling components 33 enables the gantry 1 to maintain balance in the width direction. At the same time, through the multi-point support of the lifting member 311, the stability of the gantry 1 at different heights is ensured. The setting of the traveling component 33 enables the gantry 1 to move smoothly along the length direction of the tunnel 7, improving the construction efficiency. In addition, the combined use of the vertical displacement component 31 and the traveling component 33 can also effectively reduce the errors caused by uneven ground during construction, ensuring the overall performance of the secondary lining trolley.

[0041] Referring to Figure 1 , Figure 3 and Figure 4 , the traveling component 33 includes a traveling slide rail 331 and a plurality of traveling sliders 332. The traveling slide rail 331 is arranged along the length direction of the gantry 1, and the plurality of traveling sliders 332 are correspondingly arranged with the plurality of lifting members 311. The traveling sliders 332 are connected to the corresponding lifting members 311.

[0042] Referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment of the present application, the plurality of traveling sliders 332 can perform multi-point support on the gantry 1, enabling the gantry 1 to move smoothly along the length direction of the tunnel 7.

[0043] Referring to Figure 1 , Figure 3 and Figure 4 , a horizontal displacement component 32 is connected between the traveling slider 332 and the corresponding lifting member 311. The horizontal displacement component 32 includes an alignment slide rail 321 and an alignment slider 322. The alignment slide rail 321 is installed on the traveling slider 332 along the width direction of the gantry 1. One end of the alignment slider 322 is slidably connected to the alignment slide rail 321, and the other end is connected to the lifting member 311.

[0044] Referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment of the present application, the introduction of the horizontal displacement component 32 enables the traveling slider 332 to adjust its position in the width direction of the gantry 1, thereby precisely controlling the distance between the gantry 1 and the tunnel 7 wall and ensuring the accurate alignment of the formwork mechanism 2.

[0045] Referring to Figure 1 , Figure 3 and Figure 4, the ventilation and dust removal system 4 includes a first fan 41, an air inlet pipe 42, a nozzle 43, a dust collector 44 and a dust hood 45. The first fan 41 and the dust collector 44 are both installed on the gantry 1. One end of the air inlet pipe 42 is connected to the air inlet end of the first fan 41, and the other end is used to extend outside the tunnel 7. The nozzle 43 is installed directly above the alignment mechanism 3, and the air outlet of the nozzle 43 faces the alignment mechanism 3. The air inlet of the nozzle 43 is connected to the air outlet end of the first fan 41. The dust hood 45 is arranged on the side of the alignment mechanism 3 and is connected to the dust collector 44.

[0046] Referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment of the present application, the combined use of the first fan 41 and the air inlet pipe 42 can introduce fresh air into the tunnel 7, increase the oxygen content in the tunnel 7, reduce the concentration of harmful gases, and thus ensure the physical health of the construction workers. At the same time, the setting of the nozzle 43 can blow the alignment mechanism 3 to prevent dust and impurities from adhering to the surface of the alignment mechanism 3 and affecting the normal operation of the equipment. The combined use of the dust collector 44 and the dust hood 45 can timely collect the dust and other particulate matters generated during the construction process, reduce environmental pollution, and keep the construction site clean.

[0047] Referring to Figure 1 , Figure 3 and Figure 4, a plurality of inner working windows 2122 are provided on the inner wall of the second circular arch substrate 212, and a plurality of outer working windows 2221 corresponding to the plurality of inner working windows 2122 one by one are provided on the inner wall of the first circular arch steel form 221. The grouting system 5 includes a grouting pump 51, a transfer chamber 52, a main grout outlet pipe 53 and a plurality of auxiliary grout outlet pipes 54. The grouting pump 51 is arranged on the side of the gantry 1. The transfer chamber 52 is installed on the gantry 1. The liquid inlet end of the main grout outlet pipe 53 is connected to the liquid outlet end of the grouting pump 51, and the liquid outlet end is connected to the liquid inlet end of the transfer chamber 52. The liquid inlet ends of the plurality of auxiliary grout outlet pipes 54 are all connected to the liquid outlet end of the transfer chamber 52. The plurality of auxiliary grout outlet pipes 54 are arranged corresponding to the plurality of inner working windows 2122. A coaxial telescopic pipe 55 is installed at the liquid outlet end of each auxiliary grout outlet pipe 54. A second hydraulic cylinder is connected between the liquid outlet end of the telescopic pipe 55 and the auxiliary grout outlet pipe 54 or the gantry 1, and the telescopic pipe 55 is driven to expand and contract by the second hydraulic cylinder. A sub-valve is provided at the liquid inlet end of each auxiliary grout outlet pipe 54, and the on-off of the auxiliary grout outlet pipe 54 is controlled by the sub-valve. A top grouting pipe 2112 is provided at the top end of the first circular arch substrate 211. The liquid outlet end of the top grouting pipe 2112 is coplanar with the outer wall of the first circular arch substrate 211, and the liquid inlet end is arranged inside the first circular arch substrate 211. The first circular arch steel form 221 is first provided with a top grouting hole 22102 coaxially communicated with the top grouting pipe 2112. The end of the top grouting pipe 2112 far from the first circular arch substrate 211 is used to be connected to the liquid outlet end of the transfer chamber 52. In this application, a connection valve is provided at the liquid outlet end of the transfer chamber 52. When it is necessary to input concrete into the top grouting pipe 2112, the liquid inlet end of the top grouting pipe 2112 is connected to the connection valve through a first connecting pipe.

[0048] Referring to Figure 1 , Figure 3 and Figure 4 , in the embodiment of this application, the design of the plurality of inner working windows 2122 and outer working windows 2221 makes the grouting operation more convenient and improves the work efficiency. The combined use of the grouting pump 51, the transfer chamber 52, the main grout outlet pipe 53, the auxiliary grout outlet pipes 54 and the telescopic pipes 55 of the grouting system 5 can, when grouting is required, enable the telescopic pipes 55 to sequentially pass through the inner working windows 2122 and the outer working windows 2221 and then extend into the inside of the arched formwork 23, ensuring that the concrete can be evenly and efficiently injected into the inside of the arched formwork 23, improving the grouting quality and construction efficiency. Through the arrangement of the top grouting pipe 2112 and the top grouting hole 22102, grouting can be carried out into the arched formwork 23 from the top of the arched formwork 23, so that there are less likely to be areas with grout leakage inside the arched formwork 23.

[0049] Referring to Figure 1 , Figure 3 and Figure 4, a water tank 6 is provided directly below the multiple telescopic pipes 55. The water tank 6 is connected to the gantry 1 or the second circular arch base plate 212 and is used to receive the fluid ejected from the telescopic pipes 55. A sewage pump 61 is installed at the bottom of the water tank 6, and a sewage pipe 62 is installed at the water outlet end of the sewage pump 61.

[0050] Refer to Figure 1 , Figure 3 and Figure 4 , in the embodiment of the present application, the water tank 6 is filled with water. When the grouting is paused, the telescopic pipe 55 contracts to a position directly above the water tank 6 inside the inner circular arch mold base 21. At this time, the telescopic pipe 55 has just completed grouting, and the concrete at the slurry outlet of the telescopic pipe 55 just drips into the water tank 6. The water in the water tank 6 can ensure that the dripping concrete does not solidify in the water tank 6, thereby keeping the construction site clean.

[0051] The implementation principle of a secondary lining trolley for tunnel construction in an embodiment of the present application is as follows: Select an outer circular arch steel mold 22 with an appropriate thickness according to the size of the tunnel 7 and install it on the inner circular arch mold base 21.

[0052] Lay a walking slide rail 331 in the length direction inside the tunnel 7. Through the cooperation between the walking slider 332 and the walking slide rail 331, the secondary lining trolley slides on the walking slide rail 331 until it moves to the construction area of the tunnel 7. When the secondary lining trolley is located inside the tunnel 7, the length direction of the gantry 1 is the length direction of the tunnel 7, and the width direction of the gantry 1 is the width direction of the tunnel 7.

[0053] Drive the alignment slider 322 to slide on the alignment slide rail 321, and adjust the relative position between the outer circular arch steel mold 22 and the tunnel 7 in the width direction of the tunnel 7. Drive the lifting member 311 to lift and lower, and adjust the relative position between the outer circular arch steel mold 22 and the tunnel 7 in the height direction of the tunnel 7. After completing the alignment between the outer circular arch steel mold 22 and the tunnel 7, build an arched wooden mold 23 between the steel mold and the tunnel 7 to enclose the area between the outer circular arch steel mold 22 and the tunnel 7.

[0054] The grouting pump 51 is connected to the configured concrete through a pipeline, and the inner working window 2122 and the outer working window 2221 are opened. The telescopic pipe 55 extends and passes through the inner working window 2122 and the outer working window 2221 and then extends into the arched wooden mold 23. The grouting pump 51 pumps the concrete into the arched wooden mold 23. When the liquid level of the concrete is about to rise to the outer working window 2221, retract the telescopic pipe 55 into the inner circular arch mold base 21, close the grouting port of the arched wooden mold 23 at the outer working window 2221, and close the auxiliary valve, the inner working window 2122, and the outer working window 2221.

[0055] When it is necessary to input concrete into the top grouting pipe 2112, connect the liquid inlet end of the top grouting pipe 2112 and the connection valve through the first connecting pipe. Through the settings of the top grouting pipe 2112 and the top grouting hole 22102, it is possible to grout into the arch formwork 23 from the top of the arch formwork 23 until the inside of the arch formwork 23 is filled with concrete. Then, seal the grouting port of the arch formwork 23 at the top grouting hole 22102. After the concrete has solidified to a certain extent, construct the next section of the tunnel 7.

[0056] The ventilation and dust removal system 4 operates throughout the construction process of the secondary lining trolley, and is used for dust removal on the surface of the alignment mechanism 3 and internal ventilation of the tunnel 7. The introduction of the ventilation and dust removal system 4 not only effectively removes the dust on the surface of the alignment mechanism 3, reduces the wear of the alignment mechanism 3, but also improves the air quality in the tunnel 7 and ensures the health of the construction workers.

[0057] During the construction process of the secondary lining trolley, water is injected into the water tank 6. When the grouting is paused, the telescopic pipe 55 contracts to a position directly above the water tank 6 inside the inner circular arch formwork seat 21. At this time, the telescopic pipe 55 has just completed grouting, and the concrete at the slurry outlet of the telescopic pipe 55 just drips into the water tank 6. The water in the water tank 6 can ensure that the dripping concrete will not solidify in the water tank 6, thereby keeping the construction site clean.

[0058] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The words "first", "", "" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0059] The above are all optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A secondary lining trolley for tunnel construction, characterized in that: The invention comprises a door frame (1), a template mechanism (2), a positioning mechanism (3), a ventilation and dust removal system (4) and a grouting system (5); the template mechanism (2) comprises an inner circular arch mold base (21), an outer circular arch steel mold (22) and an arched wooden mold (23); the inner circular arch mold base (21) comprises a first circular arch base plate (211) and two second circular arch base plates (212); the axis of the first circular arch base plate (211) and the axis of the second circular arch base plate (212) are both arranged horizontally along the length direction of the door frame (1); The first circular arch base plate (211) is arranged above the door frame (1), and the inner wall of the first circular arch base plate (211) is connected to the door frame (1); The two second circular arch base plates (212) are symmetrically arranged below the first circular arch base plate (211), and in the width direction of the door frame (1), the two second circular arch base plates (212) are respectively hinged to two ends of the first circular arch base plate (211); The outer circular arch steel mold (22) comprises a first circular arch steel mold plate (221) and two second circular arch steel mold plates (222), the circular arch steel mold plates are coaxially and detachably mounted on the outer wall of the first circular arch base plate (211), the two second circular arch steel mold plates (222) are arranged corresponding to the two second circular arch base plates (212), and the second circular arch steel mold plates (222) are coaxially and detachably mounted on the outer wall of the corresponding second circular arch base plate (212); The arched wooden mold (23) is installed on the outer wall of the outer circular arch steel mold (22); The calibration mechanism (3) is mounted on the portal frame (1) and is used to adjust the relative position of the portal frame (1) and the tunnel (7); The ventilation and dust removal system (4) is installed on the portal frame (1) and is used for dust removal on the surface of the alignment mechanism (3) and for ventilation inside the tunnel (7); The grouting system (5) is installed on the door frame (1) and is used to inject concrete into the interior of the arched wooden mold (23).

2. A secondary lining trolley for tunnel construction according to claim 1, characterized in that: The outer wall of the first circular arch base plate (211) is provided with a first dovetail slide rail (2111) arranged along the axial direction of the first circular arch base plate (211), the inner wall of the first circular arch steel template (221) is provided with a first dovetail slide groove (22101) arranged along the axial direction of the first circular arch steel template (221), and the first dovetail slide rail (2111) is arranged in the first dovetail slide groove (22101); The outer wall of the second circular arch base plate (212) is provided with a second dovetail slide rail (2121) arranged along the axial direction of the second circular arch base plate (212), the inner wall of the second circular arch steel template (222) is provided with a second dovetail slide groove (22201) arranged along the axial direction of the second circular arch steel template (222), and the second dovetail slide rail (2121) is arranged in the second dovetail slide groove (22201).

3. A secondary lining trolley for tunnel construction according to claim 2, characterized in that: The first circular arch steel template (221) is dynamically sealedly connected to the first circular arch base plate (211) in the axial direction of the first circular arch base plate (211); The second circular arch steel template (222) is dynamically sealed to the second circular arch base plate (212) in the axial direction of the second circular arch base plate (212).

4. A secondary lining trolley for tunnel construction according to claim 2, characterized in that: The length of the first circular arch base plate (211), the length of the second circular arch base plate (212), the length of the first circular arch steel template (221), and the length of the second circular arch steel template (222) are equal; The length of the first dovetail slide rail (2111), the length of the first dovetail slide groove (22101), the length of the second dovetail slide rail (2121) and the length of the second dovetail slide groove (22201) are equal, and are all smaller than the length of the first arch base plate (211); The first end of the first circular arch substrate (211), the first end of the second circular arch substrate (212), the first end of the first circular arch steel template (221), the first end of the second circular arch steel template (222), the first end of the first dovetail slide rail (2111), the first end of the first dovetail slide groove (22101), the first end of the second dovetail slide rail (2121) and the first end of the second dovetail slide groove (22201) are coplanar on a vertical plane.

5. The secondary lining trolley for tunnel construction according to claim 1, characterized in that: The alignment mechanism (3) comprises two vertical displacement components (31) and two travel components (33); in the width direction of the door frame (1), the two vertical displacement components (31) are spaced apart; the vertical displacement components (31) comprise a plurality of lifting members (311) distributed along the length direction of the door frame (1); the lifting members (311) are arranged below the door frame (1), and one end of the lifting members is connected to the bottom end of the door frame (1); The two walking assemblies (33) are arranged corresponding to the two vertical displacement assemblies (31); the walking assemblies (33) are arranged below the corresponding vertical displacement assemblies (31) and are connected to an end of the lifting member (311) away from the door frame (1); The traveling assembly (33) is used to drive the portal frame (1) to move along the length direction of the portal frame (1).

6. A secondary lining trolley for tunnel construction according to claim 5, characterized in that: The walking assembly (33) comprises a walking rail (331) and a plurality of walking sliders (332); the walking rail (331) is arranged along the length direction of the door frame (1); the plurality of walking sliders (332) are arranged corresponding to the plurality of lifting members (311); and the walking sliders (332) are connected to the corresponding lifting members (311).

7. A secondary lining trolley for tunnel construction according to claim 6, characterized in that: A horizontal displacement assembly (32) is connected between the travel slider (332) and the corresponding lifting member (311), and the horizontal displacement assembly (32) comprises a positioning slide rail (321) and a positioning slide rail (322), the positioning slide rail (321) is installed on the travel slider (332) along the width direction of the door frame (1), one end of the positioning slide rail (321) is slidably connected to the positioning slide rail (321), and the other end is connected to the lifting member (311).

8. A secondary lining trolley for tunnel construction according to claim 7, characterized in that: The ventilation and dust removal system (4) comprises a first fan (41), an air inlet pipe (42), a nozzle (43), a dust collector (44) and a dust hood (45); the first fan (41) and the dust collector (44) are both mounted on the door frame (1); one end of the air inlet pipe (42) is connected to the air inlet end of the first fan (41), and the other end is used to extend out of the tunnel (7); The nozzle (43) is installed directly above the positioning mechanism (3), and the air outlet of the nozzle (43) is directly opposite to the positioning mechanism (3), and the air inlet of the nozzle (43) is connected to the air outlet end of the first fan (41); The dust hood (45) is arranged on the side of the calibration mechanism (3) and is connected to the dust collector (44).

9. The secondary lining trolley for tunnel construction according to claim 1, characterized in that: A plurality of inner working windows (2122) are provided on the inner wall of the second round arch base plate (212), and a plurality of outer working windows (2221) corresponding one-to-one to the plurality of inner working windows (2122) are provided on the inner wall of the first round arch steel template (221); The grouting system (5) comprises a grouting pump (51), a transfer chamber (52), a main grouting pipe (53) and a plurality of auxiliary grouting pipes (54); the grouting pump (51) is arranged on the side of the portal frame (1); The transfer chamber (52) is installed on the portal frame (1), the liquid inlet end of the main slurry outlet pipe (53) is connected to the liquid outlet end of the grouting pump (51), and the liquid outlet end is connected to the liquid inlet end of the transfer chamber (52); The liquid inlet ends of the plurality of auxiliary slurry outlet pipes (54) are connected to the liquid outlet end of the transfer chamber (52); the plurality of auxiliary slurry outlet pipes (54) are arranged corresponding to the plurality of inner working windows (2122); and the liquid outlet end of each auxiliary slurry outlet pipe (54) is provided with a coaxial telescopic tube (55); A top grouting pipe (2112) is provided at the top of the first arched substrate (211); a liquid outlet end of the top grouting pipe (2112) is coplanar with the outer wall of the first arched substrate (211), and a liquid inlet end is provided on the inner side of the first arched substrate (211); The first circular arch steel formwork (221) is first provided with a top grouting hole (22102) coaxially connected to the top grouting pipe (2112); an end of the top grouting pipe (2112) away from the first circular arch substrate (211) is used to be connected to the liquid outlet end of the transfer chamber (52).

10. A secondary lining trolley for tunnel construction according to claim 9, characterized in that: A water trough (6) is provided directly below the plurality of telescopic tubes (55); the water trough (6) is connected to the door frame (1) or the second arch base plate (212) and is used to receive the fluid sprayed out of the telescopic tubes (55); a sewage pump (61) is installed at the bottom of the water trough (6); and a sewage pipe (62) is installed at the water outlet end of the sewage pump (61).

Images