Construction method suitable for open cut tunnel lining assembly line work

Abstract

The invention discloses a construction method suitable for open cut tunnel lining assembly line work. The construction method comprises the following steps that S1, a system conversion plant is installed; s2, a tunnel inverted arch and a filling layer are constructed; s3, the steel bar trolley and the formwork trolley are installed; s4, the steel bar trolley and the system transfer plant advance to a working face N, wherein N is an integer larger than or equal to 1; and S5, top arch steel bars of the N side walls of the working face are bound. By means of the steel bar trolley, the formwork trolley and the system conversion plant, efficient switching between open-cut tunnel lining structure steel bar binding and concrete procedures is achieved, and the problem that structural steel bars are temporarily free of supports and deform in the switching process of the steel bar trolley and the formwork trolley is solved.

Description

Technical Field

[0001] The present invention relates to the field of tunnel engineering, and particularly to a method for the pipeline construction of steel bar binding and concrete pouring for lining structures such as side walls and top arches in long open-cut tunnel engineering. Background Art

[0002] As a common construction method, the open-cut method is widely used in the construction of tunnel engineering. Its main principle is to first construct an open-cut foundation pit and then construct the main structure of the tunnel in the foundation pit. At present, the lining structure of open-cut tunnels generally uses a formwork trolley for construction. The main construction process is to first construct the invert and filling layer of the tunnel, then install the formwork trolley above the filling layer. After the trolley travels to the designated position, install the side wall and top arch steel bars in the formwork, and finally complete the concrete pouring. In the traditional construction of open-cut tunnel formwork trolleys, the trolley not only serves as a form for concrete pouring but also as a platform for steel bar binding. This results in a single formwork trolley needing to provide working conditions for two processes, staying on the same working surface for a long time and unable to form a pipeline operation. If an additional steel bar trolley is added for steel bar binding, although the pipeline operation of steel bar binding and concrete pouring can be achieved, during the switching process between the steel bar trolley and the formwork trolley, the already bound steel bars will be in a state without any support. Affected by the self-gravity of the steel bars, the bound steel bars will deform, causing the formwork trolley to be unable to normally enter below the top arch steel bars. Therefore, based on the problems and difficulties existing in the switching of each process in the current construction of open-cut tunnel lining structures, there is an urgent need for a construction method that can achieve efficient pipeline operation of open-cut tunnel lining. Summary of the Invention

[0003] Aiming at the problems such as low efficiency in the switching of steel bar binding and concrete pouring processes and difficulty in achieving pipeline operation during the current construction of open-cut tunnel lining, the present invention proposes a construction method suitable for the pipeline operation of open-cut tunnel lining.

[0004] The technical solution adopted by the present invention to solve this technical problem is: a construction method suitable for the pipeline operation of open-cut tunnel lining, including the following steps:

[0005] S1. Install the system conversion workshop;

[0006] S2. Construct the invert and filling layer of the tunnel;

[0007] S3. Install the steel bar trolley and the formwork trolley;

[0008] S4. The steel bar trolley and the system conversion workshop travel to the working surface N, where N is an integer ≥ 1;

[0009] S5. Bind the steel bars of the side wall and top arch on the working surface N;

[0010] S6. Hoist and fix the arch reinforcement on the top of the lifting and fixing working surface N of the system conversion workshop;

[0011] S7. After the steel bar support system conversion is completed, the steel bar trolley moves to the (N + 2)-th working surface;

[0012] S8. The formwork trolley enters the (N + 1)-th working surface. The formwork of the formwork trolley is polished and cleaned. After the cleaning is completed, the formwork trolley retreats to the working surface N, and the steel bar trolley retreats to the working surface N + 1;

[0013] S9. Remove the arch reinforcement on the top of the lifting working surface N of the system conversion workshop;

[0014] S10. The system conversion workshop enters the working surface N + 1;

[0015] S11. Pour the concrete for the top arch of the side wall of the working surface N;

[0016] S12. Repeat steps S5 - S11 to realize the assembly line construction operation of the open-cut tunnel lining.

[0017] As a further solution of the present invention: Before the installation of the system conversion workshop, the traveling track is installed, and the traveling track is erected on the top of the capping beam of the foundation pit retaining structure;

[0018] In step S1, the system conversion workshop includes a workshop frame body, a cantilever gantry crane, a first traveling system and a matrix hoisting system; the first traveling system is installed at the bottom of the workshop frame body, and the workshop frame body moves longitudinally along the foundation pit through the first traveling system; the cantilever gantry crane is installed on the workshop frame body, and the cantilever gantry crane is used for the hoisting and transportation of steel bar materials; the matrix hoisting system includes a number of hoisting mechanisms installed in a matrix below the workshop frame body, which is used for the hoisting and fixing of the arch steel bar system conversion, and the matrix hoisting system is controlled by a control system.

[0019] As a further solution of the present invention: After the strength of the filling layer concrete in S2 meets the requirements, in S3, a steel bar trolley and a formwork trolley are installed above the filling layer. Both the steel bar trolley and the formwork trolley are erected above the filling layer through the traveling track and move longitudinally along the tunnel through the traveling system;

[0020] Among them, the steel bar trolley consists of a steel bar trolley frame body, a second traveling system and a steel bar binding platform; the formwork trolley includes a formwork trolley frame body, a third traveling system and a formwork system; the formwork system is arranged with hydraulic cylinders to open and close the formwork; the formwork trolley track used by the formwork trolley is arranged in a staggered manner with the steel bar trolley track used by the steel bar trolley.

[0021] As a further solution of the present invention: after the installation of the steel bar trolley in S4, it travels to the working face N in the foundation pit through the second traveling system, and the system conversion workshop synchronously travels to the working face N above the foundation pit through the first traveling system.

[0022] As a further solution of the present invention: in S5, after the steel bar trolley and the system conversion workshop are both in place, the side walls and top arches of the working face N are integrally tied and installed. Among them, the steel bar raw materials are hoisted and transported into the foundation pit by the cantilever gantry crane of the system conversion workshop;

[0023] In S6, after all the side wall and top arch steel bars of the working face N are tied, the top arch steel bars of the working face N are hoisted and fixed through the matrix hoisting system of the system conversion workshop to complete the conversion of the steel bar support system from the steel bar trolley to the system conversion workshop;

[0024] In S9, after the formwork trolley is in place at the working face N, the system conversion workshop releases the hoisting and fixing of the top arch steel bars to complete the conversion of the steel bar support system from the system conversion workshop to the formwork trolley;

[0025] In S10, after the system conversion workshop and the formwork trolley complete the conversion of the top arch steel bar system, they travel to the working face N + 1 through the first traveling system;

[0026] In S11, after the formwork trolley is in place at the working face N, the hydraulic cylinder is used for mold closing, and the side walls and top arches of the working face N are integrally concreted in cooperation with the outer formwork of the top arch.

[0027] As a further solution of the present invention: in S5, before the system conversion workshop is in place, by modeling the steel bar cage, the number, installation position of the hoisting mechanism in the matrix hoisting system, and the prestress of the hoisting mechanism are calculated.

[0028] The present invention has at least the following beneficial effects:

[0029] (1) Compared with the traditional open-cut tunnel lining structure construction, the present invention uses the flow construction method to integrally construct the side walls and top arches of the open-cut tunnel lining, reducing the number of steel bar tying and concrete pouring, and improving the construction efficiency;

[0030] (2) Compared with the traditional open-cut tunnel formwork trolley construction, the present invention adopts the construction method of dividing the work procedures between the steel bar trolley and the formwork trolley, reducing the stay time of a single formwork trolley at the same working face, and improving the construction efficiency of the lining structure;

[0031] (3) The present invention solves the problem of deformation of the top arch steel bars without support during the switching between the steel bar trolley and the formwork trolley by setting up a system conversion workshop to hoist and fix the tied steel bars, ensuring the construction quality of the open-cut tunnel lining structure.

[0032] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the composition of the plant for system conversion of the present invention.

[0034] Figure 2 It is a schematic diagram of the composition of the steel bar trolley of the present invention.

[0035] Figure 3 It is a schematic diagram of the composition of the formwork trolley of the present invention.

[0036] Figure 4 It is a schematic diagram of Step 2 of the construction steps of the present invention.

[0037] Figure 5 It is a front cross-sectional view of Step 4 of the present invention.

[0038] Figure 6 It is a longitudinal cross-sectional view of Step 4 of the present invention.

[0039] Figure 7 It is a front cross-sectional view of Step 5 of the present invention.

[0040] Figure 8 It is a longitudinal cross-sectional view of Step 5 of the present invention.

[0041] Figure 9 It is a front cross-sectional view of Step 6 of the present invention.

[0042] Figure 10 It is a longitudinal cross-sectional view of Step 6 of the present invention.

[0043] Figure 11 It is a front cross-sectional view of Step 7 of the present invention.

[0044] Figure 12 It is a longitudinal cross-sectional view of Step 7 of the present invention.

[0045] Figure 13 It is a front cross-sectional view of Step 8 of the present invention.

[0046] Figure 14 It is a longitudinal cross-sectional view of Step 8 of the present invention.

[0047] Figure 15 It is a front cross-sectional view of Step 9 of the present invention.

[0048] Figure 16 It is a longitudinal cross-sectional view of Steps 10 - 11 of the present invention.

[0049] Among them: 1: Cantilever gantry crane; 2: First walking system; 3: Matrix hoisting system; 4: Factory building frame; 5: Steel bar binding platform; 6: Steel bar trolley frame; 7: Formwork; 8: Filling layer; 9: Tunnel invert; 10: Foundation pit retaining structure; 11: System conversion factory building; 12: Steel bar trolley; 13: Steel bar materials; 14: Side wall and top arch steel bars; 15: Formwork trolley; 16: Tunnel top arch; 17: Tunnel side wall; 18: Steel bar trolley track; 19: Formwork trolley track; 20: Formwork trolley frame; 21: Second walking system; 22: Third walking system. Specific embodiments

[0050] The present invention will be described in detail and completely below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that: the technical solutions and technical features provided in each part including the following descriptions of the present invention can be combined with each other without conflict.

[0051] In addition, the embodiments of the present invention involved in the following descriptions are usually only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] The following further describes the present invention in detail with reference to the accompanying drawings and embodiments, and the specific implementation process is as follows:

[0053] As Figure 1 shown, the basic structure of the open-cut tunnel includes a tunnel top arch 16 and a tunnel side wall 17. The present invention provides a construction method applicable to the lining assembly line operation of the open-cut tunnel, including the following steps:

[0054] S1. Installation of the system conversion factory building;

[0055] S2. Construction of the tunnel invert 9 and the filling layer 8: For the lining of the open-cut tunnel, the invert structure and the filling layer are constructed first. The invert construction is carried out by binding steel bars according to the conventional process and pouring concrete with formwork 7.

[0056] S3. Installation of the steel bar trolley and the formwork trolley;

[0057] S4. The steel bar trolley and the system conversion factory building move to the working face N, where N is an integer ≥ 1;

[0058] S5. Binding of the side wall and top arch steel bars at the working face N;

[0059] S6. Hoisting and fixing the top arch steel bars at the working face N by the system conversion factory building;

[0060] S7. After the conversion of the steel bar support system is completed, the steel bar trolley moves to the (N + 2)-th working face;

[0061] S8. The formwork trolley enters the (N + 1)-th working face. The formwork of the formwork trolley is polished and cleaned. After the cleaning is completed, the formwork trolley retreats to the working face N, and the steel bar trolley retreats to the working face N + 1;

[0062] S9. The hoisting working face of the top arch steel bars of the working face N is released from the system conversion workshop;

[0063] S10. The system conversion workshop enters the working face N + 1;

[0064] S11. The side wall and top arch concrete of the working face N is poured;

[0065] S12. Repeat steps S5 - S11 to realize the lining assembly line construction operation of the open-cut tunnel.

[0066] In another technical solution, before the installation of the system conversion workshop, the traveling track is installed, and the traveling track is erected on the top of the capping beam of the foundation pit retaining structure 10;

[0067] In step S1, the system conversion workshop includes a workshop frame body 4, a cantilever gantry crane 1, a first traveling system 2 and a matrix hoisting system 3; the first traveling system is installed at the bottom of the workshop frame body, and the workshop frame body moves longitudinally along the foundation pit through the first traveling system; the cantilever gantry crane is installed on the workshop frame body, and the cantilever gantry crane is used for the hoisting and transportation of steel bar materials 13; the matrix hoisting system includes a number of hoisting mechanisms installed in a matrix under the workshop frame body for the hoisting and fixing of the top arch steel bar system conversion, and the matrix hoisting system is controlled by a control system.

[0068] In another technical solution, after the strength of the filling layer concrete in S2 meets the requirements, in S3, a steel bar trolley and a formwork trolley are installed above the filling layer. Both the steel bar trolley and the formwork trolley are erected above the filling layer through the traveling track and move longitudinally along the tunnel through the traveling system;

[0069] Among them, the steel bar trolley mainly includes a steel bar trolley frame body 6, a second traveling system and a steel bar binding platform 5; to ensure that there is no position conflict during the work switching process between the steel bar trolley and the formwork trolley, the steel bar trolley is provided with a cantilever skeleton to increase the range of steel bar binding.

[0070] The formwork trolley mainly includes a formwork trolley frame body 20, a third traveling system and a formwork system; the formwork system is provided with hydraulic cylinders to open and close the formwork; to ensure that there is no conflict in the rail feeding work between the formwork trolley and the steel bar trolley track 18, the formwork trolley track 19 used by the formwork trolley and the steel bar trolley track used by the steel bar trolley are arranged in a staggered manner.

[0071] In another technical solution, after the installation of the steel bar trolley in S4 is completed, it moves to the working surface N in the foundation pit through the second walking system 21, and the system conversion plant simultaneously moves to the working surface N above the foundation pit through the first walking system.

[0072] In another technical solution, in S5, after the rebar trolley and system conversion plant are in place, the side wall and top arch reinforcement of the working surface N are integrally tied and installed. The raw rebar is hoisted and transported to the foundation pit by the cantilever gantry crane of the system conversion plant. The rebar is tied to the rebar trolley, which is a double-layer arc-shaped cage with support bars installed between the inner and outer layers of the arc. To minimize deformation of the rebar cage during installation, the support bars are arranged in five circumferential rows at angles of 15° and 30°, with longitudinal spacing of 1.2m to 2m.

[0073] In S6, after all the reinforcement of the N side wall and the top arch of the working face is tied, the N top arch reinforcement of the working face is hoisted and fixed through the matrix hoisting system of the system conversion plant, completing the conversion of the reinforcement support system from the reinforcement trolley to the system conversion plant. The matrix hoisting system calculates the position and number of lifting points through the modeling of the reinforcement cage, and fixes the end of the lifting point of the lifting mechanism at the position of the lower layer of arc-shaped reinforcement frame bars, that is, at the position of the longitudinal reinforcement at the bottom of the frame bars. The lifting mechanism is pre-tensioned by the through-hole jack and controlled to the calculated value. The deformation value of the reinforcement cage at this time at the lifting point is input into the control system. When the displacement value changes, the control system controls the lifting mechanism to pull to the preset value, thereby controlling the deformation of the reinforcement cage.

[0074] In S9, after the formwork trolley is in place on the working surface N, the system conversion plant releases the hoisting and fixing of the top arch steel bars to complete the conversion of the steel bar support system from the system conversion plant to the formwork trolley;

[0075] In S10, after the system conversion plant and the template trolley complete the top arch reinforcement system conversion, they move to the working surface N+1 through the first walking system;

[0076] In said S11, after the formwork trolley is in place on the working surface N, the hydraulic cylinder is used to close the mold, and the side walls and top arch of the working surface N are integrally poured with concrete in cooperation with the top arch outer mold.

[0077] In another technical solution, in S5, before the system conversion plant is put into place, the number, installation position and prestress of the lifting mechanisms in the matrix lifting system are calculated by modeling the steel cage.

[0078] It should be noted that when modeling, gravity is applied to the overall model, and only the displacement in the direction of gravity is constrained at the lifting points. The lifting mechanism is arranged in a matrix shape. Among them, in the cross-section of the steel reinforcement cage, the lifting points are symmetrically arranged in the cross-section of the steel reinforcement cage. The deformation nephogram is obtained through calculation, and then the position and quantity of the lifting mechanism are adjusted to minimize the deformation of the steel reinforcement cage, so as to obtain the optimal range of the position and quantity of the lifting mechanism of the matrix-type lifting system;

[0079] Adjust the tension of the distributed lifting points according to the weight of the steel reinforcement cage. The total tension of the lifting points is set to a certain proportion of the weight of the steel reinforcement cage, such as 60%; and the prestress of the two rows of lifting points near the tunnel center line of the steel reinforcement cage is set to a certain proportion of the evenly distributed total tension, such as 70%, and the prestress of the other two rows of lifting points is set to the remaining proportion of the evenly distributed total tension, such as 30%. The deformation nephogram is obtained through calculation, and then the distribution of the tension of the distributed lifting points is finely adjusted to obtain the prestress of each lifting mechanism corresponding to the distributed lifting points, so as to minimize the deformation of the steel reinforcement cage.

[0080] The deformation of the steel reinforcement cage is measured by setting multiple cross-sections, and multiple deformation measuring points are set in each cross-section for measurement. The deformation measuring points are arranged at multiple intervals along the circumferential direction of the cross-section, and the deformation amount is obtained by taking the average value of multiple cross-sections, and the deformation amount is set within a certain range. Specifically: Measuring points are arranged at positions with large displacements and important connection positions. Three cross-sections of side-middle-side are selected, and targets are arranged on the inner ring bars and the longitudinal bars adjacent to them. There are a total of 11 deformation measuring points in one cross-section, which are symmetrically arranged, and a total station is used to measure the coordinate data of each working condition to compare the deformation amount. When measuring the deformation, a total of 3 cross-sections are measured, and the measurement results are the average values of these three cross-sections. It can also be used for the measurement of the change of the displacement value in step four.

[0081] When modeling and calculating, only the circumferential bars and longitudinal bars of the steel reinforcement cage are modeled, and the stirrups are not modeled. The weight of the stirrups is converted into the density of the steel bars; the density of the steel bars ρ = ρ0·m0 / m, where ρ0 is the true density of the steel bars, ρ is the calculated density, m0 is the overall weight of the steel reinforcement cage, and m is the weight of the steel reinforcement cage without stirrups; the circumferential bars, longitudinal bars and erection bars are all modeled with beam elements. The circumferential bars and longitudinal bars are hinged, the inner second row of double-layer steel bars and the longitudinal bars are hinged, and the erection bars are rigidly connected to the inner and outer steel bars; the restraint of the foundation pit side wall on the steel reinforcement cage is an elastic horizontal support, which is simulated by a nonlinear spring, and the spring stiffness k is shown in the following formula, where l0 is the distance between the side of the steel reinforcement cage and the foundation pit side wall; the bottom of the steel reinforcement cage is fully constrained, and the vertical support is a rigid support.

[0082] Based on the problems and difficulties such as limited process switching and difficult improvement of construction efficiency during the construction process of the open-cut tunnel lining structure at present, the present invention forms a pipeline operation through construction equipment such as a steel bar trolley, a formwork trolley, and a steel bar system conversion workshop, so as to realize the efficient construction of the open-cut tunnel lining structure. The main process of the open-cut tunnel lining pipeline construction of the present invention is to first complete the construction of the inverted arch and the filling layer by using a fixed-type steel formwork. After the construction of the filling layer is completed, the trolley traveling track is installed above it, and the steel bar trolley and the formwork trolley are installed in sequence. After the installation of the steel bar trolley is completed, it travels to the working surface along the steel bar trolley track. The side wall and top arch steel bars 14 are tied on the steel bar trolley. After the steel bar tying is completed, the system conversion workshop travels to directly above the working surface foundation pit and uses a lifting tool to hoist and fix the already tied top arch steel bars. After the steel bar hoisting and fixing are completed, the steel bar trolley walks forward to enter the next working surface. The formwork trolley enters below the steel bar ring by using the traveling track. After the formwork is opened and closed, concrete is poured to complete the lining construction of this working surface, and the cycle is repeated in sequence to finally realize the open-cut tunnel lining pipeline construction operation. The present invention realizes the efficient switching between the steel bar tying and concrete processes of the open-cut tunnel lining structure through the steel bar trolley 12, the formwork trolley 15, and the system conversion workshop 11. At the same time, it also solves the problem of deformation of the structural steel bars due to temporary lack of support during the switching between the steel bar trolley and the formwork trolley, forms an efficient pipeline operation for the open-cut tunnel lining, significantly improves the construction efficiency of the open-cut tunnel lining structure, and provides certain reference and inspiration for related projects.

[0083] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the embodiments shown and described here.

Claims

1. A construction method applicable to the assembly line operation of open-cut tunnel lining, characterized in that, It includes the following steps: S1. Install the system conversion workshop; S2. Construct the invert and filling layer of the construction tunnel; S3. Install the steel bar trolley and formwork trolley; S4. The steel bar trolley and the system conversion workshop move to the working face N, where N is an integer greater than or equal to 1; S5. Bind the steel bars of the side wall and top arch on the N side of the working face; S6. Hoist and fix the top arch steel bars of the working face N by the system conversion workshop; S7. After the steel bar support system conversion is completed, the steel bar trolley moves to the (N + 2)-th working face; S8. The formwork trolley enters the (N + 1)-th working face. The formwork of the formwork trolley is polished and cleaned. After the cleaning is completed, the formwork trolley retreats to the working face N, and the steel bar trolley retreats to the working face N + 1; S9. The system conversion workshop releases the hoisting of the top arch steel bars of the working face N; S10. The system conversion workshop enters the working face N + 1; S11. Pour the concrete of the side wall and top arch of the working face N; S12. Repeat steps S5 to S11 to realize the assembly line construction operation of the open-cut tunnel lining.

2. The construction method applicable to the assembly line operation of the open-cut tunnel lining according to claim 1, characterized in that, Before installing the system conversion workshop, install the traveling track, and the traveling track is erected on the top of the capping beam of the foundation pit retaining structure; In step S1, the system conversion workshop includes a workshop frame body, a cantilever gantry crane, a first traveling system and a matrix hoisting system; the first traveling system is installed at the bottom of the workshop frame body, and the workshop frame body moves longitudinally along the foundation pit through the first traveling system; the cantilever gantry crane is installed on the workshop frame body, and the cantilever gantry crane is used for hoisting and transporting steel bar materials; the matrix hoisting system includes a number of hoisting mechanisms installed in a matrix under the workshop frame body for hoisting and fixing the conversion of the top arch steel bar system, and the matrix hoisting system is controlled by a control system.

3. The construction method applicable to the in-line operation of the open-cut tunnel lining according to claim 2, characterized in that, After the strength of the filling layer concrete in S2 meets the requirements, in S3, install the steel bar trolley and the formwork trolley above the filling layer. Both the steel bar trolley and the formwork trolley are erected above the filling layer through the traveling track and move longitudinally along the tunnel through the traveling system; Among them, the steel bar trolley consists of a steel bar trolley frame body, a second traveling system and a steel bar binding platform; the formwork trolley includes a formwork trolley frame body, a third traveling system 22 and a formwork system; the formwork system is arranged with hydraulic cylinders to open and close the formwork; the formwork trolley track used by the formwork trolley and the steel bar trolley track used by the steel bar trolley are arranged in a staggered manner.

4. The construction method applicable to the assembly line operation of the open-cut tunnel lining according to claim 3, characterized in that, In S4, after the steel bar trolley is installed, it travels to the working face N in the foundation pit through the second traveling system, and the system conversion workshop synchronously travels to the working face N above the foundation pit through the first traveling system.

5. The construction method applicable to the assembly line operation of the open-cut tunnel lining according to claim 4, characterized in that, In S5, after the steel bar trolley and the system conversion workshop are in place, the steel bars of the side wall and top arch of the working face N are integrally bound and installed. Among them, the steel bar raw materials are hoisted and transported into the foundation pit by the cantilever gantry crane of the system conversion workshop; In S6, after all the steel bars of the side wall and top arch of the working face N are bound, the top arch steel bars of the working face N are hoisted and fixed by the matrix hoisting system of the system conversion workshop to complete the conversion of the steel bar support system from the steel bar trolley to the system conversion workshop; In S9, after the formwork trolley is in place at the working face N, the system conversion workshop releases the hoisting and fixing of the top arch steel bars to complete the conversion of the steel bar support system from the system conversion workshop to the formwork trolley; In S10, after the arch reinforcement system conversion between the system conversion workshop and the form traveler is completed, it travels to the working face N+1 through the first walking system; In S11, after the form traveler is in place at the working face N, the hydraulic cylinder is used for mold closing, and integral concrete pouring of the side wall and arch at the working face N is carried out in cooperation with the outer arch form.

6. The construction method applicable to the assembly line operation of the open-cut tunnel lining according to claim 5, characterized in that, In S5, before the system conversion workshop is in place, by modeling the steel reinforcement cage, the number, installation position of the hoisting mechanisms in the matrix hoisting system and the prestress of the hoisting mechanisms are calculated.

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