Railway tunnel shield construction method with simultaneous lining and tunneling construction and trolley sleepers

Abstract

The present invention discloses a railway tunnel shield construction method for simultaneous construction of lining and excavation, which belongs to the technical field of railway tunnel shield construction and includes the following steps: laying tram sleepers and tram tracks; laying trolley sleepers and trolley tracks; advancing the trolley and lining casting platform; arranging and tying lining steel bars; positioning the table formwork and installing the end formwork; installing the bottom steel plug; pouring lining concrete; curing the lining concrete and cleaning the table formwork; removing and transferring the trolley tracks and trolley sleepers; and pouring the next casting section. The present invention also discloses a trolley sleeper, comprising a first arc-shaped steel section, a second arc-shaped steel section, a vertical support steel section, and a transverse rail surface steel section. The present invention can achieve simultaneous construction of lining and shield excavation, significantly improving construction efficiency; the trolley sleeper of the present invention is easy to quickly assemble and disassemble, can be recycled, and is suitable for simultaneous construction of lining and shield excavation in most railway shield tunnels.

Description

Technical Field

[0001] The invention relates to a railway tunnel shield construction method, in particular to a railway tunnel shield construction method with synchronous lining and excavation construction and a trolley sleeper, belonging to the technical field of railway tunnel shield construction. Background Art

[0002] Railway tunnels are increasingly being constructed using shield machines. Typically, shield tunnels employ a single-layer segmental lining structure. However, with the application of shield tunnels in heavy-load railway projects, tunnels are prone to significant longitudinal differential settlement under heavy loads. Therefore, single-layer segmental lining structures often cannot meet the long-term operational requirements of heavy-load railway tunnels, necessitating the use of a double-layer lining structure, which requires consideration of the construction of the inner lining.

[0003] Currently, if railway tunnel shield construction involves lining construction, either the semi-synchronous construction plan of the mining method tunnel is used, or the overall excavation construction is completed first and then the lining is poured. These two traditional methods have the following drawbacks:

[0004] First, tunnel lining construction using the mining method often requires pausing tunnel excavation and resuming it only after the lining is complete, a cycle that results in low construction efficiency. If this lining construction method is used in shield tunneling, the shield machine remains in standby mode for extended periods, reducing tunneling efficiency and leading to high construction risks and poor economic returns.

[0005] Secondly, the method of completing the overall excavation construction first and then carrying out the lining pouring construction can proceed smoothly, but the construction progress and efficiency are very low, and the construction period is long.

[0006] In addition, during the pouring construction in railway tunnels, since it is necessary to consider the transportation of workers and materials, as well as the construction needs such as formwork support and pouring, it is necessary to lay tram (electric vehicles used to transport construction workers and construction materials) tracks (tram sleepers refer to the tracks used by power supply vehicles, generally steel rails) and trolley (construction vehicles used for lining construction, also called lining trolleys) tracks (trolley sleepers refer to the tracks used by trolleys, generally steel rails). Tram tracks are installed on tram sleepers (sleepers are structures that directly support railway tracks, tram sleepers refer to the sleepers used by power supply vehicles). The trolley track is installed on the trolley sleeper (trolley sleeper refers to the sleeper used for the trolley). In order to be able to install two types of tracks at the same time in a tunnel with a small diameter, the traditional method is generally to lay long sleepers shared by trams and trolleys at the bottom of the tunnel, so that the tram track and the trolley track are on the same horizontal plane. When the trolley track needs to be transferred forward for recycling, only the trolley track is transferred and the long sleeper is not moved. However, this type of long sleeper has high material consumption and poor stability. Moreover, if the trolley and tram are on the same horizontal plane, the storage tank platform for storing concrete in the pouring platform may affect the passage of the tram in the tunnel. Summary of the Invention

[0007] The purpose of the present invention is to provide a railway tunnel shield construction method and a trolley sleeper with efficient and safe synchronous lining and excavation construction in order to solve the above problems.

[0008] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0009] A railway tunnel shield construction method with simultaneous lining and tunneling construction comprises the following steps:

[0010] Step 1: Laying tram sleepers and tram tracks: During shield tunneling and segment assembly, tram sleepers are laid at the bottom of the tunnel, and tram tracks are laid on top of the sleepers.

[0011] Step 2: Laying trolley sleepers and trolley tracks: While laying the tram sleepers and tram tracks, simultaneously lay trolley sleepers on the left and right sides of the tram sleepers, and lay trolley tracks on the trolley sleepers;

[0012] Step 3: Advancement of the trolley and lining pouring platform: After the trolley sleepers and trolley tracks are laid, the trolley is advanced to the designated section of the tunnel for preparation for table formwork installation. The lining pouring platform is simultaneously advanced behind the trolley, and the pump truck on the lining pouring platform prepares for concrete injection. During this process, the trolley and the lining pouring platform share the trolley sleepers and trolley tracks.

[0013] Step 4: Arrangement and tying of inner lining reinforcement: If the inner lining is a reinforced concrete structure, tie the reinforcement after the inner lining reinforcement is arranged on the ground or in a trolley; if the inner lining is a plain concrete structure, no reinforcement operation is performed;

[0014] Step 5: Positioning the table formwork and installing the end formwork: After the inner lining steel bars are arranged, apply a release agent on the outside of the table formwork, lift the table formwork to the designated position, and install the end formwork after the table formwork is positioned. The table formwork is composed of an upper arch table formwork at the top and two lower arch table formworks located below the upper arch table formwork on both sides.

[0015] Step 6: Install the bottom steel plug: After the table form is positioned, install the bottom steel plug at the end of the lower arch table form as the template for the lower arch bottom end of the lining concrete;

[0016] Step 7: Lining concrete pouring: insert the concrete pump pipe into the table formwork, and use the pump truck on the lining pouring platform to press and compact the lining concrete;

[0017] Step 8: Lining concrete curing and table formwork cleaning: After the lining concrete reaches the specified strength, the table formwork and end formwork are removed for cleaning and recycling, in preparation for the lining pouring of the next pouring section;

[0018] Step 9, dismantling and transferring the trolley tracks and trolley sleepers: during the lining concrete curing period, dismantle the trolley tracks and trolley sleepers in the poured lining area, transfer the rear trolley tracks and trolley sleepers to the front unpoured section, and recycle the trolley tracks and trolley sleepers;

[0019] Step 10, pouring the next pouring section: after the trolley track and trolley sleeper rail are transferred forward and the lining concrete is cured, the trolley and lining pouring platform are pushed to the next pouring section to pour the next section of lining concrete; the tram sleepers and tram track are laid continuously and retained until the entire tunnel excavation and lining pouring are completed, and the tram track, tram sleepers, trolley track and trolley sleepers are removed.

[0020] Preferably, in order to improve the strength of the trolley sleeper and ensure a stable connection with the tunnel, in step 2, the trolley sleeper is a prefabricated steel structure, and the trolley sleeper is welded into a whole when it is prefabricated from different steel sections; the trolley sleeper is connected to the tunnel shield segment by bolts, and one end face of the trolley sleeper is in surface contact with the corresponding end face of the tram sleeper.

[0021] Preferably, in order to facilitate the connection of the upper arch formwork and the lower arch formwork, in step 5, upper embedded parts are provided at both ends of the upper arch formwork and bolt holes are provided on the upper embedded parts, and lower embedded parts are provided at the upper end of the lower arch formwork and bolt holes are provided on the lower embedded parts, and the upper embedded parts and the lower embedded parts are connected by bolts.

[0022] Preferably, in order to reliably connect the lower arch formwork and the trolley sleeper, in step 5, a screw support joint is provided at the lower end of the lower arch formwork, which is connected to the screw support joint on the trolley sleeper through a screw.

[0023] Preferably, in order to block the gap, in step 6, one end of the bottom steel plug is flush with the bottom of the corresponding lower arch platform mold, and the gap between the other end and the trolley rail sleeper is filled with a supporting wedge.

[0024] Preferably, in order to reliably connect the bottom steel plug and the trolley sleeper, in step 6, a screw support joint is provided on the bottom steel plug and the screw support joint is connected to the screw support joint on the trolley sleeper through a screw.

[0025] Preferably, in order to ensure the fluidity of the concrete, in step 7, the pump truck tank is equipped with a power device.

[0026] A trolley sleeper is used in a railway tunnel shield construction method for simultaneous lining and excavation construction, comprising a first arc-shaped steel section, a second arc-shaped steel section, a vertical support steel section and a transverse rail surface steel section, wherein the upper end of the vertical support steel section is welded to one end of the transverse rail surface steel section, the curvature of the first arc-shaped steel section and the second arc-shaped steel section are respectively the same as the curvature of the corresponding position of the tunnel, the inner side of the arc of the first arc-shaped steel section is welded to the lower end of the vertical support steel section, one end face of the first arc-shaped steel section is a vertical plane and the vertical plane is used to contact the corresponding end face of the tram sleeper, the inner side of the arc of the second arc-shaped steel section is welded to the other end of the transverse rail surface steel section, the outer sides of the arcs of the first arc-shaped steel section and the second arc-shaped steel section are respectively provided with connection holes and the connection holes are used to connect to the shield pipe segment.

[0027] Preferably, in order to improve the strength of the trolley sleeper, reinforcing ribs are welded between the vertical surface of the vertical supporting steel away from the transverse rail surface steel and the inner surface of the arc of the first arc-shaped steel, and between the lower surface of the transverse rail surface steel and the inner surface of the arc of the second arc-shaped steel.

[0028] Preferably, in order to facilitate connection with other components, the upper surface of the transverse rail surface steel is provided with two screw support joints.

[0029] The beneficial effects of the present invention are:

[0030] The present invention lays temporary and mutually independent tram sleepers and trolley sleepers while the shield tunnel is being excavated, ensuring that the two do not interfere with each other, thereby improving the reliability of the trolley operation and the smoothness of operations such as supporting the formwork. By supporting the formwork with the trolley and injecting the lining concrete from the lining pouring platform behind the trolley, the lining and shield excavation can be constructed synchronously, that is, the lining is poured while excavating, thereby significantly improving the construction efficiency. The construction method of the present invention can also be promoted and applied to urban road shield tunnels and municipal shield tunnels (gas, electricity, water supply, etc.) that require the installation of lining structures. In addition, the trolley sleepers of the present invention use interconnected first arc-shaped steel, second arc-shaped steel, vertical support steel and transverse rail surface steel, which can achieve stable and reliable connection with the tunnel's shield segments, lower arch formwork and bottom steel plugs, and achieve surface-to-surface contact with the tram sleepers for positioning. It is also easy to assemble and disassemble quickly and is easy to recycle. It is suitable for the synchronous construction of most railway shield tunnel linings and shield excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the cross-sectional structure of a railway tunnel constructed using the shield construction method for synchronous lining and tunneling construction according to the present invention;

[0032] Figure 2This is a schematic diagram of a segmented longitudinal end section during construction using the railway tunnel shield construction method of the present invention for simultaneous lining and tunneling, showing the structure of half of the tunnel;

[0033] Figure 3 This is a schematic diagram of the main structure of the trolley sleeper used in the railway tunnel shield construction method for simultaneous lining and tunneling construction according to the present invention;

[0034] Figure 4 This is a schematic diagram of the structure from above when the railway tunnel shield construction method of the present invention with simultaneous lining and tunneling construction is used;

[0035] Figure 5 This is a schematic diagram of the main structure of the upper arch formwork used in the railway tunnel shield construction method for synchronous lining and tunneling construction according to the present invention;

[0036] Figure 6 This is a schematic diagram of the main structure of the left lower arch formwork used in the railway tunnel shield construction method for simultaneous lining and tunneling construction according to the present invention;

[0037] Figure 7 This is a schematic diagram of the main structure of the right lower arch formwork used in the railway tunnel shield construction method for simultaneous lining and tunneling construction according to the present invention;

[0038] Figure 8 It is a schematic diagram of the main structure of the bottom steel plug used in the railway tunnel shield construction method with simultaneous lining and tunneling construction described in the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings:

[0040] In order to more clearly understand the construction process, the relevant component structures involved in the present invention are first described below.

[0041] like Figure 1As shown, the tunnel 1 includes double-layer segments, where "1" in the figure points to the outer shield segment, which also refers to the tunnel. The tram sleeper 2 is laid in the middle of the bottom of the tunnel 1, and the trolley sleepers 3 are laid on both sides of the tram sleeper 2. The top of the tunnel 1 is laid with the upper arch formwork 4-1, and the left lower arch formwork 4-2 and the right lower arch formwork 4-3 are laid on the left and right sides of the tunnel 1. The lower end of the left lower arch formwork 4-2 is between the left end of the trolley sleeper 3 on the left, and the lower end of the right lower arch formwork 4-3 is between the left and right ends of the trolley sleeper 3 on the left. The bottom steel plug 5 is laid between the left ends of the trolley sleepers 3, and the gap between one end of the bottom steel plug 5 and the corresponding trolley sleeper 3 is filled with a supporting wedge 6. The left supporting screw 7-1 is arranged on the screw supporting joint of the trolley sleeper 3 on the left and the screw supporting joint of the left lower arch formwork 4-2, and the right supporting screw 7-2 is arranged on the screw supporting joint of the trolley sleeper 3 on the right and the screw supporting joint of the right lower arch formwork 4-3. After the pouring is completed, the inner lining 8 is formed on the inner side of the shield segment of the tunnel 1.

[0042] like Figure 3 As shown, the trolley sleeper used in the railway tunnel shield construction method for synchronous lining and excavation construction of the present invention includes a first arc-shaped steel 3-2, a second arc-shaped steel 3-1, a vertical support steel 3-4 and a transverse rail surface steel 3-3, the upper end of the vertical support steel 3-4 is welded to one end of the transverse rail surface steel 3-3, the curvature of the first arc-shaped steel 3-2 and the second arc-shaped steel 3-1 are respectively the same as the curvature of the corresponding positions of the tunnel 1, the inner side of the arc of the first arc-shaped steel 3-2 is welded to the lower end of the vertical support steel 3-4, and one end face of the first arc-shaped steel 3-2 is a vertical plane and the vertical plane is used to mate with the tram sleeper 2 (reference Figure 1 The corresponding end faces of the tram sleeper 2) are in contact with each other, the inner side of the arc of the second arc-shaped steel 3-1 is welded to the other end of the transverse rail surface steel 3-3, and the outer sides of the arcs of the first arc-shaped steel 3-2 and the second arc-shaped steel 3-1 are respectively provided with connecting holes 3-2-1, 3-2-2, 3-1-1, and 3-1-2, and these connecting holes 3-2-1, 3-2-2, 3-1-1, and 3-1-2 are respectively used to connect with the shield segments of the tunnel 1; reinforcing ribs 3-5 are respectively welded between the vertical surface of the vertical support steel 3-4 on the side away from the transverse rail surface steel 3-3 and the inner side surface of the arc of the first arc-shaped steel 3-2, and between the lower surface of the transverse rail surface steel 3-3 and the inner side surface of the arc of the second arc-shaped steel 3-1; two screw support joints 3-3-1 and 3-3-2 are provided on the upper surface of the transverse rail surface steel 3-3.

[0043] like Figure 5-Figure 7As shown, the table formwork of the present invention is composed of an upper arch table formwork 4-1 located at the top of the tunnel 1 and two lower arch table forms located at the lower sides of the tunnel 1, namely, a left lower arch table formwork 4-2 and a right lower arch table formwork 4-3. The left end of the upper arch table formwork 4-1 is provided with a left upper embedded part 4-1-1 and the upper left embedded part 4-1-1 is provided with a bolt hole 4-1-1-1. The right end of the upper arch table formwork 4-1 is provided with a right upper embedded part 4-1-2 and the upper right embedded part 4-1-2 is provided with a screw hole 4-1-1-1. Bolt hole 4-1-2-1, the upper end of the lower left arch formwork 4-2 is provided with a lower left embedded part 4-2-1 and the lower left embedded part 4-2-1 is provided with a bolt hole 4-2-1-1, the lower end of the lower left arch formwork 4-2 is provided with a screw support joint 4-2-2, the upper end of the lower right arch formwork 4-3 is provided with a lower right embedded part 4-3-1 and the lower right embedded part 4-3-1 is provided with a bolt hole 4-3-1-1, and the lower end of the lower right arch formwork 4-3 is provided with a screw support joint 4-3-2.

[0044] like Figure 8 As shown, the bottom steel plug 5 involved in the present invention is formed by connecting two L-shaped steel end molds 5-1 and 5-2, and the two L-shaped steel end molds 5-1 and 5-2 are connected by an intermediate hinge 5-5. The intermediate hinge 5-5 is provided with a circular hole, and the two L-shaped steel end molds 5-1 and 5-2 are connected as a whole by a screw. After being connected as a whole, the two L-shaped steel end molds 5-1 and 5-2 can rotate around the screw, and plug reinforcement ribs 5-3 are arranged at intervals along the length direction of the two L-shaped steel end molds 5-1 and 5-2. The plug reinforcement ribs 5-3 are provided with a screw support joint 5-3-1, and the middle space between the two L-shaped steel end molds 5-1 and 5-2 is adjusted to install the middle water stop 5-4.

[0045] like Figure 2 As shown, the overall construction process of the present invention is as follows: construction is carried out in the tunnel area 1-1 that has been excavated. During the construction, the shield machine continues to shield excavate the tunnel area 1-2 in front. After the excavation of the tunnel area 1-2 is completed, the construction of the tunnel area 1-1 is also completed, and then the trolley sleepers 3 and trolley tracks 3-6 (reference Figure 3 The trolley rail 3-6 shown in the figure is removed and transferred to the tunnel area 1-2 to continue construction, while the tram sleeper 2 is not removed, and this cycle is repeated until the construction of the entire tunnel 1 is completed. The removal process of the trolley sleeper 3 and the trolley rail 3-6 is as follows: during the pouring and subsequent maintenance of the front section of the lining 8-2, the shield machine will continue to advance into the tunnel area 1-2. During the advancement of the tunnel area 1-2, the front tram sleeper 2 can be laid synchronously, and the trolley sleeper 3 and trolley rail 3-6 in the corresponding area of ​​the rear section of the lining 8-1 that has completed maintenance will be removed and transferred to the front excavation area 1-2, so as to realize the recycling of the trolley sleeper 3.

[0046] like Figures 1-8As shown, the railway tunnel shield construction method with simultaneous lining and tunneling construction of the present invention comprises the following steps:

[0047] Step 1: Laying the tram sleeper 2 and tram track 2-1: During shield tunneling and assembling of segments (i.e., the inner and outer shield segments of the tunnel 1), the tram sleeper 2 is simultaneously laid at the bottom center of the tunnel 1, and the tram track 2-1 is laid on the sleeper 2;

[0048] Step 2, laying trolley sleepers 3 and trolley tracks 3-6: while laying the tram sleepers 2 and tram tracks 2-1, synchronously lay trolley sleepers 3 on the left and right sides of the tram sleepers 2, and lay trolley tracks 3-6 on the trolley sleepers 3; in this step, the trolley sleepers 2 are prefabricated steel structures, which are prefabricated with different steel sections and welded into a whole, and the trolley sleepers 3 are connected to the shield segments of the tunnel 1 by bolts, that is, the connecting holes 3-2-1, 3-2-2, 3-1-1, 3-1-2 on the outer side of the circular arc of the first curved steel section 3-2 and the second curved steel section 3-1 are connected with the corresponding bolt hand holes 1-1 on the shield segments of the tunnel 1 by bolts, so that the trolley sleepers 3 can be stably installed on the inner side of the tunnel 1, and the end face of one end of the trolley sleeper 3, that is, the corresponding end face of the first curved steel section 3-2, is in surface contact with the corresponding end face of the tram sleeper 2;

[0049] Step 3: Advance the trolley and lining pouring platform: After the trolley sleeper 3 and trolley tracks 3-6 are laid, the trolley is advanced to the designated section in the tunnel 1 for preparation for table formwork installation. The lining pouring platform is simultaneously advanced behind the trolley, and the pump truck on the lining pouring platform prepares for concrete injection. During this process, the trolley and the lining pouring platform share the trolley sleeper 3 and trolley tracks 3-6.

[0050] Step 4: Arrange and tie the inner lining reinforcement: If the inner lining is a reinforced concrete structure, tie the reinforcement after the inner lining reinforcement is arranged on the ground or in a trolley; if the inner lining is a plain concrete structure, no reinforcement operation is performed, i.e., this step is omitted;

[0051] Step 5, table formwork positioning and end formwork installation: after the lining steel bars are configured, apply a release agent on the outside of the table formwork, lift the table formwork to the designated position, and install the end formwork after the table formwork is positioned; the table formwork is composed of an upper arch table formwork 4-1 at the top and two lower arch table formworks located below the upper arch table formwork on both sides, namely, the lower left arch table formwork 4-2 and the lower right arch table formwork 4-3; the specific installation process is as follows: align the upper left embedded part 4-1-1 of the upper arch table formwork 4-1 and the lower left embedded part 4-2-1 of the lower left arch table formwork 4-2, and connect and fix the upper arch table formwork 4-1 and the lower left arch table formwork 4-2 through the bolt holes 4-1-1-1 on the upper left embedded part 4-1-1 and the bolt holes 4-2-1-1 on the lower left embedded part 4-2-1; align the upper right embedded part 4-1-2 of the upper arch table formwork 4-1 and the right of the lower right arch table formwork 4-3 The lower embedded parts 4-3-1 are aligned, and the upper arch platform mold 4-1 and the lower right arch platform mold 4-3 are connected and fixed through the bolt holes 4-1-2-1 on the upper right embedded part 4-1-2 and the bolt holes 4-3-1-1 on the lower right embedded part 4-3-1; at this point, the upper arch platform mold 4-1 is connected to the lower left arch platform mold 4-2 and the lower right arch platform mold 4-3 as a whole, thereby enhancing stability; a screw support joint 4-2-2 is provided at the lower end of the lower left arch platform mold 4-2, and the screw support joint 4-2-2 is connected to the screw support joint 3-3-2 on the left trolley sleeper 3 through a first screw 7-1, and a screw support joint 4-3-2 is provided at the lower end of the lower right arch platform mold 4-3, and the screw support joint 4-3-2 is connected to the screw support joint 3-3-2 on the right trolley sleeper 3 through a first screw 7-1;

[0052] Step 6, installing the bottom steel plug 5: after the platform formwork is positioned, install the bottom steel plug 5 at the lower ends of the left lower arch platform formwork 4-2 and the right lower arch platform formwork 4-3 as the template for the bottom end of the lower arch of the lining concrete; the installation process of the bottom steel plug 5 is as follows: one end of the bottom steel plug 5 is flush with the bottom of the corresponding lower arch platform formwork and the screw support joint 5-3-1 of the bottom steel plug 5 is connected to the screw support joint 3-3-1 on the corresponding trolley sleeper 3 through the second screw 7-2, and the gap between the other end of the bottom steel plug 5 and the trolley sleeper 3 is filled with a supporting wedge 6; when the lining 8 is poured, the pressure on the bottom steel plug 5 can be transmitted to the trolley sleeper 3 through the second screw 7-2, and then transmitted to the bottom of the tunnel 1, which can enhance the stability of the bottom steel plug 5;

[0053] Step 7, pouring concrete for the lining 8: After the table form is positioned through the above steps, the annular end form is sealed, and a concrete pump pipe is inserted into the table form. The lining concrete is pressed and vibrated by a pump truck on the lining pouring platform. The pump truck has a built-in power device in the tank;

[0054] Step 8, curing the concrete of the lining 8 and cleaning the table formwork: after the concrete of the lining 8 reaches the specified strength, the table formwork and the end formwork are removed for cleaning and recycling, in preparation for pouring the lining 8 of the next pouring section;

[0055] Step 9, dismantling and transferring the trolley rails 3 and trolley sleepers 3-6: During the concrete curing period of the lining 8, the trolley rails 3-6 and trolley sleepers 3 in the poured lining area are dismantled, and the trolley rails 3-6 and trolley sleepers 3 at the rear are transferred to the uncast section at the front for recycling.

[0056] Step 10, pouring the next pouring section: after the trolley track 3-6 and the trolley sleeper 3 are transferred forward and the concrete of the lining 8 is cured, the trolley and the lining pouring platform are pushed to the next pouring section to pour the concrete of the next section of the lining 8; the tram sleepers 2 and the tram track 2-1 are continuously laid and retained until the excavation of the entire tunnel 1 and the pouring of the lining 8 are completed, the tram track 2-1, the tram sleepers 2, the trolley track 3-6 and the trolley sleepers 6 are removed, and the construction of the lining 8 of the entire tunnel 1 is completed; then the corresponding train sleepers and other required internal structure construction are carried out.

[0057] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A railway tunnel shield construction method with simultaneous lining and tunneling construction, characterized by: The following steps are involved: Step 1: Laying tram sleepers and tram tracks: During shield tunneling and segment assembly, tram sleepers are laid at the bottom of the tunnel, and tram tracks are laid on top of the sleepers. Step 2: Laying trolley sleepers and trolley tracks: While laying the tram sleepers and tram tracks, simultaneously lay trolley sleepers on the left and right sides of the tram sleepers, and lay trolley tracks on the trolley sleepers; Step 3: Advancement of the trolley and lining pouring platform: After the trolley sleepers and trolley tracks are laid, the trolley is advanced to the designated section of the tunnel for preparation for table formwork installation. The lining pouring platform is simultaneously advanced behind the trolley, and the pump truck on the lining pouring platform prepares for concrete injection. During this process, the trolley and the lining pouring platform share the trolley sleepers and trolley tracks. Step 4: Arrangement and tying of inner lining reinforcement: If the inner lining is a reinforced concrete structure, tie the reinforcement after the inner lining reinforcement is arranged on the ground or in a trolley; if the inner lining is a plain concrete structure, no reinforcement operation is performed; Step 5: Positioning the table formwork and installing the end formwork: After the inner lining steel bars are arranged, apply a release agent on the outside of the table formwork, lift the table formwork to the designated position, and install the end formwork after the table formwork is positioned. The table formwork is composed of an upper arch table formwork at the top and two lower arch table formworks located below the upper arch table formwork on both sides. Step 6. Install the bottom steel plug: After the platform formwork is positioned, install the bottom steel plug at the end of the lower arch platform formwork as the template for the bottom end of the lower arch of the inner lining concrete; the bottom steel plug is connected by two L-shaped steel end forms, and the two L-shaped steel end forms are connected by a middle hinge. The middle hinge is provided with a circular hole, and the two L-shaped steel end forms are connected as a whole by a screw. After being connected as a whole, the two L-shaped steel end forms can rotate around the screw. Plug reinforcement ribs are arranged at intervals along the length direction of the two L-shaped steel end forms, and the plug reinforcement ribs are provided with screw support joints. The middle space between the two L-shaped steel end forms is adjusted to install the middle waterstop; Step 7: Lining concrete pouring: insert the concrete pump pipe into the table formwork, and use the pump truck on the lining pouring platform to press and compact the lining concrete; Step 8: Lining concrete curing and table formwork cleaning: After the lining concrete reaches the specified strength, the table formwork and end formwork are removed for cleaning and recycling, in preparation for the lining pouring of the next pouring section; Step 9, dismantling and transferring the trolley tracks and trolley sleepers: during the lining concrete curing period, dismantle the trolley tracks and trolley sleepers in the poured lining area, transfer the rear trolley tracks and trolley sleepers to the front unpoured section, and recycle the trolley tracks and trolley sleepers; Step 10, pouring the next pouring section: after the trolley track and trolley sleeper rail are transferred forward and the lining concrete is cured, the trolley and lining pouring platform are pushed to the next pouring section to pour the next section of lining concrete; the tram sleepers and tram track are laid continuously and retained until the entire tunnel excavation and lining pouring are completed, and the tram track, tram sleepers, trolley track and trolley sleepers are removed.

2. The railway tunnel shield construction method with simultaneous lining and tunneling construction according to claim 1 is characterized in that: In step 2, the trolley sleeper is a prefabricated steel structure, and the trolley sleeper is welded into a whole when it is prefabricated from different steel sections; the trolley sleeper is connected to the tunnel shield segment by bolts, and one end face of the trolley sleeper is in surface contact with the corresponding end face of the tram sleeper.

3. The railway tunnel shield construction method with simultaneous lining and tunneling construction according to claim 1 or 2, characterized in that: In step 5, upper embedded parts are provided at both ends of the upper arch formwork and bolt holes are provided on the upper embedded parts, and lower embedded parts are provided at the upper end of the lower arch formwork and bolt holes are provided on the lower embedded parts, and the upper embedded parts and the lower embedded parts are connected by bolts.

4. The railway tunnel shield construction method with simultaneous lining and tunneling construction according to claim 3 is characterized by: In step 5, a screw support joint is provided at the lower end of the lower arch platform mold, and is connected to the screw support joint on the trolley sleeper through a screw.

5. The railway tunnel shield construction method with simultaneous lining and tunneling construction according to claim 1 or 2, characterized in that: In step 6, one end of the bottom steel plug is flush with the bottom of the corresponding lower arch platform mold, and the gap between the other end and the trolley sleeper is filled with a supporting wedge.

6. The railway tunnel shield construction method with simultaneous lining and tunneling construction according to claim 1 or 2, characterized in that: In step 7, the tank of the pump truck is equipped with a power device.

7. A trolley sleeper used in the railway tunnel shield construction method with simultaneous lining and tunneling construction as claimed in claim 1 or 2, characterized in that: It includes a first arc-shaped steel section, a second arc-shaped steel section, a vertical support steel section and a transverse rail surface steel section. The upper end of the vertical support steel section is welded to one end of the transverse rail surface steel section. The curvature of the first arc-shaped steel section and the second arc-shaped steel section are respectively the same as the curvature of the corresponding position of the tunnel. The inner side of the arc of the first arc-shaped steel section is welded to the lower end of the vertical support steel section. One end face of the first arc-shaped steel section is a vertical plane and the vertical plane is used to contact the corresponding end face of the tram sleeper. The inner side of the arc of the second arc-shaped steel section is welded to the other end of the transverse rail surface steel section. The outer sides of the arcs of the first arc-shaped steel section and the second arc-shaped steel section are respectively provided with connection holes and the connection holes are used to connect with the shield pipe segment.

8. The trolley sleeper according to claim 7, characterized in that: Reinforcing ribs are welded between the vertical surface of the vertical support steel away from the transverse rail steel and the inner arc surface of the first arc steel, and between the lower surface of the transverse rail steel and the inner arc surface of the second arc steel.

9. The trolley sleeper according to claim 7, characterized in that: The upper surface of the transverse rail section steel is provided with two screw support joints.

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