A full-circle tunnel lining construction method

Abstract

The present invention discloses a full-circle tunnel lining construction method. The method utilizes a lining trolley composed of relatively rotatable unit modules. By changing the corresponding straight section joint templates or curved section joint templates in different construction sections, the lining trolley is driven by a self-lifting device to slide on a support portion. The method is applicable not only to horizontal straight sections and horizontal curved sections, but also to the construction requirements of lower curved sections, vertical shaft sections, inclined shaft sections, and upper curved sections. This construction method utilizes a single set of lining trolleys to complete the mechanized lining construction of the entire tunnel, from the lower flat tunnel section to the lower curved section, then to the vertical shaft section or inclined shaft section, and finally to the upper flat tunnel section, thereby reducing manual labor, shortening construction period, saving construction costs, and effectively achieving continuity in the lining construction of the entire tunnel section.

Description

Technical Field

[0001] The invention relates to the field of water diversion tunnel lining construction, in particular to a full-circle tunnel lining construction method. Background Art

[0002] Diversion tunnels for water conservancy and hydropower projects typically have full-circular cross-sections. Hydraulic lining trolleys for horizontal, straight, full-circular tunnel construction are now relatively mature and widely used. Existing hydraulic lining trolleys primarily include side-top arch, full-circular needle-beam, bottom-form needle-beam, and full-circular travel types. Lifting slipforms, jacking slipforms, and flipping formwork are also commonly used in hydraulic tunnel and bridge construction.

[0003] In the mechanized lining construction of hydraulic tunnels, the existing technical solutions are mainly divided into the following categories:

[0004] a. The construction method adopts a full-circular needle-beam lining trolley. This method solves the problem of the trolley moving forward on its own. It has the advantages of forming the entire section lining in one go, simple operation, fast movement, less preparation work, smooth and smooth surface of the poured concrete, easy control of structural dimensions and engineering quality, and safe and reliable construction. It ensures the quality of concrete lining construction of water diversion tunnels such as hydropower stations. This method is generally suitable for horizontal straight tunnels.

[0005] b. Use a bottom formwork needle-beam lining trolley combined with a side-top arch lining trolley for construction. This method generally uses the bottom formwork needle-beam trolley to cast the bottom of the tunnel first, and then uses the side-top arch lining trolley to cast the remaining part of the tunnel to achieve full-circular section lining construction. This method is generally also suitable for horizontal straight tunnels.

[0006] c. When it comes to the tunnel lining construction of flat or vertical curved sections, it is generally the case that the horizontal straight section is constructed first using a lining trolley, and then the lining construction of the curved section is completed by manually erecting a scaffold and installing a small steel or wooden formwork.

[0007] The existing full-circle tunnel lining construction method is only applicable to horizontal curved sections and horizontal straight sections, and cannot be well applied to inclined shaft sections, vertical shaft straight sections, downward curved sections or upward curved sections. At the same time, it cannot well achieve the continuity of the full-section tunnel lining construction. Summary of the Invention

[0008] The purpose of the present invention is to solve the problem in the prior art that continuous construction of the entire tunnel lining cannot be achieved, and to provide a full-circle tunnel lining construction method.

[0009] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0010] A full-circle tunnel lining construction method uses a lining trolley composed of multiple unit modules. Straight section joint templates for straight tunnels and curved section joint templates for curved tunnels are arranged between the unit modules. The forward end of the lining trolley is provided with a self-lifting device. The self-lifting device drives the lining trolley to slide on a support portion via a traction rope, and includes the following steps:

[0011] S1. Lay a support at the bottom of the straight tunnel, set the straight section joint template between the two unit modules, place the lining trolley on the support, connect the self-lifting device to the traction rope at the center axis of the tunnel, and complete the preparation work before entering the tunnel;

[0012] S2. Concrete pouring operations and straight section demoulding operations are performed on the lower flat tunnel section, using the self-lifting device to pull the lining trolley to slide on the support portion;

[0013] S3. Replace the straight segment seam template with the curved segment seam template until the lining trolley is completely moved to the lower curved segment to be poured;

[0014] S4. The concrete pouring operation and the demoulding operation of the lower curved section are performed, and the self-lifting device is used to pull the lining trolley to slide on the support portion;

[0015] S5. Replace the curved segment seam template with the straight segment seam template until the lining trolley is completely moved to the vertical or inclined shaft section to be poured;

[0016] S6. The concrete pouring operation and the straight section demoulding operation are performed on the vertical shaft section or the inclined shaft section, and the lining trolley is pulled by the self-lifting device to slide on the support portion;

[0017] S7. Replace the straight segment joint template with the curved segment joint template until the lining trolley is completely moved to the upper curved segment to be poured;

[0018] S8. The concrete pouring operation and the demoulding operation of the upper curved section are performed, and the lining trolley is pulled by the self-lifting device to slide on the support portion;

[0019] S9. Replace the curved segment joint template with the straight segment joint template until the lining trolley is completely moved to the upper flat tunnel section to be poured;

[0020] S10. Perform the concrete pouring operation on the upper flat tunnel section and the demoulding operation on the straight section, and use the self-lifting equipment to pull the lining trolley to slide on the support part.

[0021] The full-circle tunnel lining construction method provided by the present invention utilizes a lining trolley composed of relatively rotatable unit modules. By changing the corresponding straight section joint templates or curved section joint templates in different construction sections, the method utilizes a self-lifting device to drive the lining trolley to slide on a support portion. This method is applicable not only to horizontal straight sections and horizontal curved sections, but also to the construction needs of lower curved sections, vertical shaft sections, inclined shaft sections, and upper curved sections. This construction method, using a single set of lining trolleys, can complete the mechanized lining construction of the entire tunnel, from the lower flat tunnel section to the lower curved section, then to the vertical shaft section or inclined shaft section, and finally through the upper curved section to the upper flat tunnel section. This reduces manual workload, shortens construction period, saves construction costs, and effectively achieves continuity in the lining construction of the entire tunnel section.

[0022] Preferably, the unit module is provided with a position adjustment component for adjusting the position of the lining trolley in the tunnel, the upper part, left side and right side of the unit module are provided with retractable templates, and the lower part of the unit module is fixedly connected to a lower fixed template. The concrete pouring operation includes the following steps:

[0023] A. Install the steel mesh of the section to be poured, avoiding the support portion at the bottom of the tunnel. After the lining trolley is moved to the pouring position by the self-lifting equipment, the position adjustment component is used to lift the lining trolley as a whole until it is separated from the support portion and a gap is left.

[0024] B. Arranging the support part at the next bin to be poured;

[0025] C. Installing a trolley anti-floating support in the gap between the bottom of the lining trolley and the tunnel rock wall, then installing the steel mesh at the bottom of the tunnel, then fixing the anti-floating support to the lining trolley, and finally adjusting the position of the lining trolley in the tunnel using the position adjustment component;

[0026] D. Expand the formwork on the upper, left and right sides of the unit module into place, install the end formwork at both ends of the lining trolley and then pour concrete.

[0027] Preferably, the straight section demoulding operation includes the following steps:

[0028] After the concrete pouring is completed, the templates arranged on the upper, left and right sides of the unit module are retracted to complete the demoulding of the upper and both sides of the lining trolley; the lining trolley is lifted up as a whole by the position adjustment component to complete the demoulding of the lower fixed template.

[0029] Preferably, a protective plate is provided between the poured concrete and the lining trolley, and the lining trolley is pulled to slide on the support portion by the self-lifting device, comprising the following steps:

[0030] The protective plate is placed between the bottom of the lining trolley and the concrete surface, and the lining trolley is lowered as a whole by the position adjustment component and placed on the protective plate; the lining trolley is towed to the position where the next bin is to be poured, and the head end of the lining trolley is placed on the support part, and the tail end of the lining trolley is reserved on the concrete poured in the previous bin.

[0031] With this construction method, a part of the tail end of the lining trolley is reserved on the concrete poured in the previous bin, which not only supports the tail end of the lining trolley but also positions the trolley in the tunnel.

[0032] Preferably, replacing the straight segment joint template with the curved segment joint template comprises the following steps:

[0033] After the last bin of the straight section is demoulded, the support part is arranged in the curved section, the straight section joint templates arranged between the unit modules are removed, the protective plate is placed, and the lining trolley is pulled forward. After each two sections of the unit modules are pulled to the curved section, the curved section joint template is installed in the gap between the two unit modules until all gaps are replaced with the curved section joint template.

[0034] With this construction method, when the lining trolley needs to move from a straight section to a curved section for construction, there is no need to use multiple sets of trolley equipment for construction. It is only necessary to gradually replace the straight section joint template with the curved section joint template, and utilize the lining trolley's own bendable characteristics to adapt to the construction needs of different curved sections.

[0035] Preferably, the demoulding operation of the bent section includes the following steps:

[0036] After the concrete pouring is completed, the bent section joint formwork is first removed, and the demoulding is carried out by using the jump section demoulding method, that is, the upper part and the left and right side formwork of the odd-numbered unit modules are first retracted, and then the upper part and the left and right side formwork of the even-numbered unit modules are retracted, or the upper part and the left and right side formwork of the even-numbered unit modules are first retracted, and then the upper part and the left and right side formwork of the odd-numbered unit modules are retracted, and finally the lining trolley is lifted up as a whole by the position adjustment component to complete the demoulding of the lower fixed formwork.

[0037] With this construction method, since the lining trolley is in a bent state, if the bent section joint templates between the unit modules are demoulded at the same time, interference will occur between the bent section joint templates. Therefore, the demoulding is carried out in a skipping manner. This method can more conveniently demould the bent sections.

[0038] Preferably, replacing the curved segment seam template with the straight segment seam template comprises the following steps:

[0039] After the last bin of the curved section is cast, the curved section joint template installed between each of the unit modules is removed, and then the protective plate is placed. The lining trolley is towed to the straight section. Every time two unit modules are towed to the straight section, a straight section joint template is installed in the gap between the two unit modules until all gaps are replaced with the straight section joint template.

[0040] With this construction method, when the lining trolley needs to move from a curved section to a straight section for construction, there is no need to use multiple sets of trolley equipment for construction. It is only necessary to gradually replace the curved section joint template with the straight section joint template. At this time, the lining trolley becomes straight again, and the construction requirement of moving from the curved section to the straight section can be met.

[0041] Preferably, the supporting portion is two parallel rails.

[0042] Preferably, the support portion is a section of concrete pre-cast at the bottom of the tunnel, used to support the lining trolley.

[0043] The support part is set to pre-pour a section of concrete at the bottom of the tunnel. After the lining trolley is moved onto the pre-poured concrete, the remaining concrete is poured to complete the concrete pouring work of the section to be poured. This saves the space occupied by the trolley in the tunnel, reduces the difficulty of designing and manufacturing the support part, eliminates the trouble of setting up additional support parts, and reduces construction costs.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The full-circle tunnel lining construction method provided by the present invention utilizes a lining trolley composed of relatively rotatable unit modules. This method changes the corresponding straight section joint template or curved section joint template in different construction sections, and uses self-lifting equipment to drive the lining trolley to slide on the support portion. This method is not only applicable to horizontal straight sections and horizontal curved sections, but also to the construction work requirements of lower curved sections, vertical shaft sections, inclined shaft sections, and upper curved sections. This construction method can complete the mechanized lining construction of the entire tunnel from the lower flat tunnel section to the lower curved section, then to the vertical shaft section or inclined shaft section, and finally through the upper curved section to the upper flat tunnel section using a set of lining trolleys. This reduces manual workload, shortens construction period, saves construction costs, and can well achieve the continuity of the lining construction of the entire tunnel section.

[0046] 2. By adopting the construction method provided by the present invention, when the lining trolley needs to enter the curved section from the straight section for construction, there is no need to use multiple sets of trolley equipment in combination with the construction. It is only necessary to gradually replace the straight section joint template with the curved section joint template, and utilize the bendable characteristics of the lining trolley itself to adapt to the construction requirements of different curved sections; when the lining trolley needs to enter the straight section from the curved section for construction, it is also not necessary to use multiple sets of trolley equipment in combination with the construction. It is only necessary to gradually replace the curved section joint template with the straight section joint template. At this time, the lining trolley becomes straight again, and the construction requirement of entering the straight section from the curved section can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the lining trolley located in the straight section and shaft section;

[0048] Figure 2 for Figure 1 A magnified view of part A;

[0049] Figure 3 for Figure 1 Enlarged view of part B;

[0050] Figure 4 This is a schematic diagram of the lining trolley located in the inclined shaft section;

[0051] Figure 5 This is a schematic diagram of a state where the lining trolley is located in the lower bend section;

[0052] Figure 6 for Figure 5 Enlarged view of part C;

[0053] Figure 7 This is a schematic diagram of another state of the lining trolley located in the lower bend section.

[0054] Numbers in the figure: 1- lining trolley, 11- straight section joint formwork, 12- curved section joint formwork, 2- support part, 3- protection plate, 4- self-lifting equipment, 5- traction rope. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be understood as limiting the scope of the present invention to the following embodiments, and all technologies implemented based on the present invention fall within the scope of the present invention.

[0056] Example 1

[0057] like Figure 1-7 As shown, the present invention provides a full-circle tunnel lining construction method. In this embodiment, the support part 2 is used to support the lining trolley 1 and allow the lining trolley 1 to move on the support part 2. The support part 2 is two parallel tracks. The method includes the following steps:

[0058] S1. First, lay two parallel tracks in the excavated lower adit section of the tunnel, close to the tunnel entrance. The track length should be approximately equal to or longer than the length of the lining trolley 1. The tracks are fixed to the bedrock of the tunnel using anchor rods, anchor bolts, and other fixing devices. The track ends should be connected to a track traction device to facilitate subsequent track movement. The track traction device can be a manual hoist, electric hoist, or winch. Unit modules are assembled outside the lower adit section of the tunnel, and each unit module is then assembled into the lining trolley 1. Straight segment joint templates 11 are installed in the hinged gaps between each unit module and secured with bolts. Release agent should be applied to the template surface of each unit module in advance. Position adjustment components are installed on the unit modules for adjusting the position of the lining trolley 1 in the tunnel. A self-lifting device 4 is fixed to the forward end of the lining trolley 1. Traction rope guides are then installed on the upper and lower curved sections of the tunnel. The purpose of the traction rope guides is to keep the traction rope 5 aligned with the central axis of the tunnel, ensuring smooth traction and movement of the lining trolley 1. Pass one end of the traction rope 5 through the traction rope guide device on the tunnel wall and through the self-lifting device 4 to ensure that it is located at the central axis of the tunnel. The other end of the traction rope 5 is anchored at the end of the upper horizontal tunnel section of the tunnel. The traction rope 5 remains stationary during the entire movement process. The self-lifting device 4 moves along the traction rope 5 to drive the lining trolley 1 to move. The assembled lining trolley 1 is towed by the self-lifting device 4 to the previously pre-laid track, completing the preparation work before entering the tunnel;

[0059] S2. Install steel mesh at 240° on the upper part of the section to be poured in the tunnel, leaving 120° at the bottom without steel mesh to avoid interference with the bottom track; after moving the lining trolley 1 to the pouring position using the self-lifting equipment 4, lift the lining trolley 1 as a whole to disengage from the bottom track using the position adjustment components, leaving a gap; remove the anchor rods, bolts and other fixing devices that fix the track to the bedrock, and use the track traction device pre-connected to the track to drag the track from the bottom of the lining trolley 1 to the next bin pouring position, and re-fix the track; install the trolley anti-floating support in the gap between the bottom of the lining trolley 1 and the tunnel rock wall, and fix the anti-floating support with anchor rods and other fixings. On the bedrock of the tunnel rock wall, it is evenly arranged on the bottom of the entire lining trolley 1; a 120° steel mesh is installed at the bottom. After the steel mesh is installed, the bottom of the lining trolley 1 is connected to the anti-floating support with bolts to prevent the trolley from floating up as a whole when pouring concrete or falling down due to its own gravity when not pouring; finally, the position adjustment component is used to ensure that the lining trolley 1 is always positioned in the middle of the tunnel during the entire pouring process; the formwork set on the upper, left and right sides of the unit module is expanded to the lining pipe pouring position, the head formwork at both ends of the lining trolley 1 is installed, and pumped concrete is poured through the pouring windows preset on the formwork surface of the lining trolley 1.

[0060] After the concrete pouring is completed, wait for the concrete to solidify to the required strength, then retract the formwork set on the upper, left and right sides of the unit module to complete the demoulding of the upper and two sides, and lift the lining trolley 1 as a whole through the position adjustment component. Since the lower fixed formwork is fixedly connected to the unit module, the lining trolley 1 rises as a whole, driving the lower fixed formwork to move upward together, completing the demoulding of the lower fixed formwork.

[0061] In order to protect the concrete surface and facilitate the traction and movement of the lining trolley 1 on the poured concrete surface, after the bottom of the lining trolley 1 is raised and demoulded, a protective plate 3 is placed between the bottom of the lining trolley 1 and the concrete surface. The lining trolley 1 is lowered as a whole through the position adjustment component and placed on the protective plate 3.

[0062] The lining trolley 1 is towed to the second bin where concrete is to be poured using the self-lifting device 4. The head end of the lining trolley 1 is placed on the track that has been towed into place in advance, and a portion of the tail end of the lining trolley 1 is reserved on the concrete poured in the previous bin, which serves to position the trolley in the tunnel. Since a portion of the tail end of the lining trolley 1 is reserved on the concrete poured in the previous bin, during subsequent construction, the portion of the tail end of the lining trolley 1 that is reserved on the concrete poured in the previous bin does not require the use of position adjustment components to adjust the position of the lining trolley 1 in the tunnel.

[0063] After the track is removed, the 120° steel mesh and anti-floating supports are installed at the bottom in the same manner as for the first chamber. The lining trolley 1 is lowered and secured to the anti-floating supports. The position of the lining trolley 1 is adjusted using the position adjustment components, and the second chamber concrete is poured. After pouring, the concrete is allowed to solidify to the required strength and then demolded in the same manner as for the first chamber. After demolding, a protective plate 3 is placed under the lining trolley 1 and the lining trolley is towed to the next chamber for pouring.

[0064] Repeat the steps of the second warehouse to complete the subsequent construction work of the lower level tunnel section.

[0065] S3. After the template of the last bin of the straight section is demoulded, the track is moved to the curved section. The straight section joint template 11 installed between each unit module needs to be removed, and then the protective plate 3 is placed. The lining trolley 1 is pulled forward by the self-lifting equipment 4. After each two unit modules are pulled to the curved section, the hinge gap between the two unit modules needs to be installed with the curved section joint template 12 and fixed with bolts until all the hinge gaps are replaced with the curved section joint template 12, so that the entire lining trolley 1 can smoothly match the curved section of the tunnel. Similarly, a portion of the tail end of the trolley needs to be reserved in the concrete that has been poured, and a portion of the tail end of the lining trolley 1 is reserved on the concrete poured in the previous bin for positioning. Since a portion of the tail end of the lining trolley 1 is reserved on the concrete poured in the previous bin, in subsequent construction, the portion of the tail end of the lining trolley 1 reserved on the concrete poured in the previous bin does not need to use position adjustment components to adjust the position of the lining trolley 1 in the tunnel. With this construction method, when the lining trolley needs to move from a straight section to a curved section for construction, there is no need to use multiple sets of trolley equipment for construction. It is only necessary to gradually replace the straight section joint template 11 with the curved section joint template 12, and utilize the lining trolley's own bendable characteristics to adapt to the construction requirements of different curved sections.

[0066] S4. The movement mode and concrete pouring operation process of the lining trolley 1 in the lower curved section are similar to those of the upper flat tunnel section, but the demolding of the lower curved section after pouring is different from that of the straight section. Since the lining trolley 1 is in a bent state, if the curved section joint templates 12 between the unit modules are demolded at the same time, interference will occur between the curved section joint templates 12. Therefore, we first remove the curved section joint templates 12 and use the jump section demolding method to demold, that is, first retract the upper part and left and right side templates of the odd-numbered unit modules, and then retract the upper part and left and right side templates of the even-numbered unit modules, or first retract the upper part and left and right side templates of the even-numbered unit modules, and then retract the upper part and left and right side templates of the odd-numbered unit modules, and finally lift the lining trolley 1 as a whole upward through the position adjustment component to complete the demolding of the lower fixed template.

[0067] The steel mesh installation method for the lower bend section is the same as for the upper flat tunnel section. The trolley is pulled to the next casting position in the lower bend section in the same manner as for the straight section. The trolley is raised entirely using the position adjustment components, and the lower bend section track is pulled to the next casting position. The formwork is then extended to the lining pipe casting position in the same manner as for the straight section to complete the casting of that position. The same method is used to cast the subsequent lower bend sections of the tunnel until the last position in the lower bend section is reached.

[0068] S5. After the last bin of the curved section is poured, the curved section is moved into the straight section. The track is removed, and the curved section joint templates 12 installed between each unit module are removed. Then, the protective plate 3 is placed. The lining trolley 1 is towed to the straight section. After each two unit modules are towed to the straight section, a straight section joint template 11 is installed in the gap between the two unit modules and fixed with bolts until all gaps are replaced with the straight section joint template 11. At this time, the entire lining trolley 1 becomes a straight structure again.

[0069] S6. The movement of the lining trolley 1, concrete pouring and demoulding in the inclined shaft section are similar to those in the upper horizontal tunnel section. However, the construction of the vertical shaft section is different. Since the lining trolley 1 is lifted vertically in the vertical shaft section, the movement of the lining trolley 1 in the vertical shaft section does not require tracks, such as Figure 3 、 4 As shown, the traction rope 5 is divided into two strands and located on both sides of the forward end of the lining trolley 1. The lining trolley 1 can be directly lifted vertically by the self-lifting equipment 4. The traction ropes 5 on both sides of the lining trolley 1 can adjust the balance of the lining trolley 1 during vertical movement to ensure that the lining trolley 1 is always located at the central axis position of the tunnel; the operating steps of the concrete pouring operation and demoulding operation in the vertical shaft section are similar to those of the upper flat tunnel section.

[0070] S7. Use the self-lifting device 4 to pull the lining trolley 1 to slide on the track and replace the straight section joint template 11 with the curved section joint template 12 until the lining trolley 1 is completely moved to the upper curved section to be poured. Here, the straight section also enters the curved section. The construction steps are the same as S3.

[0071] S8. The concrete pouring and demoulding operations for the upper curved section are the same as those for the lower curved section.

[0072] S9. Use the self-lifting device 4 to pull the lining trolley 1 on the track and replace the curved segment joint template 12 with the straight segment joint template 11 until the lining trolley 1 is completely moved to the upper flat tunnel section to be poured. Here, the straight section is also entered from the curved section. The construction steps are the same as S5.

[0073] S10. The movement mode of the lining trolley 1, the concrete pouring construction process and the straight section demoulding operation of the upper flat tunnel section are the same as those of the lower flat tunnel section.

[0074] This embodiment only shows the complete construction method of the construction method provided by the present invention in the lower flat tunnel section, lower bend section, vertical shaft section or inclined shaft section, upper bend section, and upper flat tunnel section. The construction method provided by the present invention can also be applied to a combination of one or more sections.

[0075] Example 2

[0076] What is different from Example 1 is that during the construction of the lower flat tunnel section, the lower bend section, the inclined shaft section, the upper bend section, and the upper flat tunnel section, in this embodiment, the support portion 2 is a section of concrete pre-cast at the bottom of the tunnel, and the length of the pre-cast concrete is equal to or longer than the length of the lining trolley 1. When using the method of this embodiment to carry out full-circle tunnel lining construction, before moving the lining trolley 1, it is necessary to pre-cast a section of concrete at the bottom of the tunnel, and then move the lining trolley 1 onto the pre-cast concrete, and then carry out concrete pouring and formwork demolding operations in other parts of the tunnel outside the support portion 2. After the construction work of the pouring section is completed, a section of concrete at the bottom of the next warehouse tunnel is pre-cast, and then the lining trolley 1 is moved onto the pre-cast concrete to carry out the corresponding construction work.

[0077] In this embodiment, when the shaft section is constructed, the lining trolley 1 is lifted vertically, and there is no need to pour concrete on the bottom of the lining trolley 1 in advance.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A full-circle tunnel lining construction method, characterized in that: A lining trolley (1) composed of a plurality of unit modules is used, wherein a straight section joint template (11) for a straight section tunnel and a curved section joint template (12) for a curved section tunnel are provided between the unit modules, and a self-lifting device (4) is provided at the forward end of the lining trolley (1), and the self-lifting device (4) drives the lining trolley (1) to slide on a support portion (2) via a traction rope (5), comprising the following steps: S1. Lay a support portion (2) at the bottom of the straight tunnel, set the straight segment joint template (11) between the two unit modules, place the lining trolley (1) on the support portion (2), connect the self-lifting device (4) to the traction rope (5) at the central axis of the tunnel, and complete the preparation work before entering the tunnel; S2. Concrete pouring operation and straight section demoulding operation are performed on the lower flat tunnel section, and the self-lifting device (4) is used to pull the lining trolley (1) to slide on the support portion (2); S3. The straight segment joint template (11) is replaced with the curved segment joint template (12) until the lining trolley (1) is completely moved to the lower curved segment to be cast; S4. The concrete pouring operation and the demoulding operation of the lower curved section are performed, and the self-lifting device (4) is used to pull the lining trolley (1) to slide on the support portion (2); S5. Replace the curved segment joint template (12) with the straight segment joint template (11) until the lining trolley (1) is completely moved to the vertical shaft section or the inclined shaft section to be poured; S6. Performing the concrete pouring operation and the straight section demoulding operation on the vertical shaft section or the inclined shaft section, using the self-lifting device (4) to pull the lining trolley (1) to slide on the support portion (2); S7. The straight segment joint template (11) is replaced with the curved segment joint template (12) until the lining trolley (1) is completely moved to the upper curved segment to be poured; S8. The concrete pouring operation and the demoulding operation of the upper curved section are performed, and the self-lifting device (4) is used to pull the lining trolley (1) to slide on the support portion (2); S9. Replace the curved segment joint template (12) with the straight segment joint template (11) until the lining trolley (1) is completely moved to the upper flat tunnel section to be poured; S10. Carry out the concrete pouring operation and the straight section demoulding operation on the upper flat tunnel section, and use the self-lifting device (4) to pull the lining trolley (1) to slide on the support part (2).

2. A full-circle tunnel lining construction method according to claim 1, characterized in that: The unit module is provided with a position adjustment component for adjusting the position of the lining trolley (1) in the tunnel, the upper part, left side and right side of the unit module are provided with a retractable template, and the lower part of the unit module is fixedly connected to a lower fixed template. The concrete pouring operation includes the following steps: A. Installing the steel mesh of the section to be poured, wherein the steel mesh avoids the support portion (2) at the bottom of the tunnel, and after the lining trolley (1) is moved to the position to be poured by the self-lifting device (4), the lining trolley (1) is lifted as a whole by the position adjustment component until it is separated from the support portion (2) and a gap is left; B. Arranging the support part (2) at the position where the next bin is to be poured; C. Installing a trolley anti-floating support in the gap between the bottom of the lining trolley (1) and the tunnel rock wall, then installing the steel mesh at the bottom of the tunnel, then fixing the anti-floating support to the lining trolley (1), and finally adjusting the position of the lining trolley (1) in the tunnel by using the position adjustment component; D. Expand the templates on the upper, left and right sides of the unit module into place, install the end templates at both ends of the lining trolley (1), and then pour concrete.

3. A full-circle tunnel lining construction method according to claim 2, characterized in that: The straight section demoulding operation comprises the following steps: After the concrete pouring is completed, the templates arranged on the upper part, left side and right side of the unit module are retracted to complete the demoulding of the upper part and both sides of the lining trolley (1); the lining trolley (1) is lifted upward as a whole by the position adjustment component to complete the demoulding of the lower fixed template.

4. A full-circle tunnel lining construction method according to claim 2, characterized in that: A protective plate (3) is provided between the poured concrete and the lining trolley, and the lining trolley (1) is pulled to slide on the support portion (2) by the self-lifting device (4), comprising the following steps: The protective plate (3) is placed between the bottom of the lining trolley (1) and the concrete surface, and the lining trolley (1) is lowered as a whole by the position adjustment component and placed on the protective plate (3); the lining trolley (1) is towed to the next bin to be poured, the head end of the lining trolley (1) is placed on the support part (2), and the tail end of the lining trolley (1) is reserved on the concrete poured in the previous bin.

5. A full-circle tunnel lining construction method according to claim 4, characterized in that: Replacing the straight segment joint template (11) with the curved segment joint template (12) comprises the following steps: After the last bin of the straight section is demoulded, the support portion (2) is arranged in the curved section, the straight section joint template (11) arranged between the unit modules is removed, the protective plate (3) is placed, and the lining trolley (1) is pulled forward. After each two sections of the unit modules are pulled to the curved section, the curved section joint template (12) is installed in the gap between the two unit modules until all gaps are replaced with the curved section joint template (12).

6. A full-circle tunnel lining construction method according to claim 2, characterized in that: The bending section demoulding operation includes the following steps: After the concrete pouring is completed, the curved section joint template (12) is first removed, and the demoulding is performed by a jump section demoulding method, that is, the upper part and the left and right side templates of the odd-numbered unit modules are first retracted, and then the upper part and the left and right side templates of the even-numbered unit modules are retracted, or the upper part and the left and right side templates of the even-numbered unit modules are first retracted, and then the upper part and the left and right side templates of the odd-numbered unit modules are retracted, and finally the lining trolley (1) is lifted up as a whole by the position adjustment component to complete the demoulding of the lower fixed template.

7. A full-circle tunnel lining construction method according to claim 4, characterized in that: Replacing the curved segment joint template (12) with the straight segment joint template (11) comprises the following steps: After the last bin of the curved section is cast, the curved section joint template (12) installed between each of the unit modules is removed, and the protective plate (3) is placed, and the lining trolley (1) is pulled to the straight section. Every time two sections of the unit modules are pulled to the straight section, a straight section joint template (11) is installed in the gap between the two unit modules until all gaps are replaced with the straight section joint template (11).

8. A full-circle tunnel lining construction method according to claim 1, characterized in that: The support portion (2) is two parallel rails.

9. A full-circle tunnel lining construction method according to claim 1, characterized in that: The support portion (2) is a section of concrete pre-cast at the bottom of the tunnel, and is used to support the lining trolley (1).

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