Tunnel steel lining installation system and construction method

Abstract

The present invention provides a tunnel steel lining installation system and construction method, including a steel lining assembly, a lifting frame, an installation stand and a rail car. The steel lining assembly includes a pair of steel lining halves, and the installation stand includes an umbrella support mechanism and a lifting mechanism. The umbrella support mechanism is used to drive the steel lining halves on both sides to rotate, and the lifting mechanism is used to drive the umbrella support mechanism to move up and down. The steel lining assembly is first assembled outside the tunnel, and then placed on the installation stand through the lifting frame, and the steel lining assembly is transported by the rail car. During the installation process, the steel lining halves on both sides can be easily opened and moved into place by adjusting the umbrella support mechanism and the lifting mechanism, so as to fit the original tunnel lining to be repaired and reinforced, and the steel lining is completely installed. In this way, under the time limit of the skylight, the installation of the entire ring and the entire section of the steel lining is ensured to form a new complete tunnel lining structure system. Once the steel lining is installed, the normal operation of the railway can be restored to ensure driving safety.

Description

Technical Field

[0001] The invention relates to the technical field of railway tunnel disease control, and in particular to a tunnel steel lining installation system and a construction method. Background Art

[0002] Railway tunnel diseases include lining cracking, peeling, block falling, water leakage, etc. Tunnel diseases affect normal driving and endanger driving safety.

[0003] In view of the time limit of the "window (i.e. the time reserved by the railway for maintenance every day, generally 4 hours)", the current treatment of railway tunnel defects mostly adopts "patching" methods such as spraying concrete on the local lining of the tunnel or spraying concrete with steel mesh, as well as grouting.

[0004] However, the tunnel lining repaired by the "patching" method can only provide temporary partial improvement, and there are still risks of water leakage, lining peeling and other hazards to driving safety. Summary of the invention

[0005] The present invention provides a tunnel steel lining installation system and a construction method for solving the time and space conflict between the tunnel installation project and the normal railway operation.

[0006] The present invention provides a tunnel steel lining installation system, comprising:

[0007] The steel lining assembly comprises a pair of steel lining halves symmetrically arranged about the tunnel centerline and matched with the inner contour of the tunnel, wherein the pair of steel lining halves are detachably connected, and the pair of steel lining halves are provided with locking holes for connecting the tunnel lining to be repaired and reinforced;

[0008] A lifting frame, used for lifting the steel lining assembly and detachably connected to the steel lining assembly;

[0009] A mounting stand is used to mount the steel lining assembly onto the tunnel lining to be repaired and reinforced, a pair of the steel lining halves are located on both sides of the mounting stand, the mounting stand comprises an umbrella support mechanism and a lifting mechanism connected to the umbrella support mechanism, the lifting frame is detachably connected to the umbrella support mechanism, the umbrella support mechanism is used to drive the steel lining halves to rotate toward or away from the tunnel centerline, and the lifting mechanism is used to drive the umbrella support mechanism to move in the tunnel height direction;

[0010] The rail car is used to transport the steel lining assembly to a location to be installed in the tunnel and can move along the length direction of the tunnel. The installation platform is installed on the rail car.

[0011] The tunnel steel lining installation system provided by the present invention also includes a group of positioning piers for calibrating the steel lining assembly, wherein the group of positioning piers matches the inner contour of the tunnel and is provided with positioning grooves for inserting the bottom of the steel lining assembly.

[0012] According to the tunnel steel lining installation system provided by the present invention, the lifting frame comprises:

[0013] A pair of node plates, symmetrically arranged about the tunnel centerline and matched with the steel lining half bodies, wherein the pair of node plates are detachably connected to the pair of steel lining half bodies;

[0014] A pair of connecting longitudinal beams are arranged at intervals along the tunnel width direction, one side of the pair of connecting longitudinal beams is connected to the node plate, and the other side is detachably connected to the umbrella support mechanism;

[0015] A pair of connecting cross beams are detachably connected between the pair of connecting longitudinal beams and are arranged at intervals along the length direction of the tunnel.

[0016] At least two lifting eyes for connecting lifting equipment.

[0017] According to the tunnel steel lining installation system provided by the present invention, the umbrella support mechanism comprises:

[0018] A lifting beam installed on the lifting mechanism;

[0019] A pair of connecting beams, symmetrically arranged about the tunnel centerline and hinged to each other, the connecting longitudinal beams being connected to the connecting beams;

[0020] A pair of telescopic components are symmetrically arranged about the tunnel centerline and perform telescopic movement along the tunnel height direction, one end of the telescopic component is hinged to the connecting beam, and the other end is hinged to the lifting beam;

[0021] A pair of support beams, one end of the pair of support beams is hinged to one end of the telescopic assembly close to the lifting beam, and the other end is hinged to one end of the connecting beam away from the telescopic assembly.

[0022] According to the tunnel steel lining installation system provided by the present invention, the lifting mechanism comprises:

[0023] a platform crossbeam mounted on the rail car;

[0024] A lifting jack is arranged on the platform crossbeam and is used to drive the umbrella support mechanism to move along the height direction of the tunnel.

[0025] According to the tunnel steel lining installation system provided by the present invention, the installation platform also includes a gate-shaped bracket, the platform crossbeam is slidably connected to the gate-shaped bracket and moves along the width direction of the tunnel, and the gate-shaped bracket is slidably connected to the rail car and moves along the length direction of the tunnel.

[0026] The tunnel steel lining installation system provided by the present invention further includes adjustable support feet arranged on the rail car, and the adjustable support feet are used to adjust the height of the rail car to make the rail car leave the track and adjust the installation platform to a horizontal posture.

[0027] The present invention also provides a tunnel steel lining installation construction method, comprising the following steps:

[0028] Assembling a steel lining assembly outside the tunnel, the steel lining assembly comprising a pair of steel lining halves, connecting the pair of steel lining halves to form a full-ring steel lining unit;

[0029] Multiple full-ring steel lining units are stacked and connected in sequence to form a steel lining segment;

[0030] Connect the node plate of the lifting frame to the steel lining segment, connect the lifting device to the lifting frame, and lift the steel lining segment to the positioning pier through the lifting device;

[0031] The rail car drives under the steel liner segment placed on the positioning pier;

[0032] Fine-tune the lifting mechanism and the umbrella support mechanism according to the height position of the steel lining segment to connect the umbrella support mechanism with the lifting frame;

[0033] Separate the steel lining halves on both sides and remove the connecting beams on the lifting frame;

[0034] Adjust the lifting mechanism to make the steel lining segment rise to the position away from the positioning pier, and adjust the umbrella support mechanism to make the steel lining halves on both sides rotate towards the tunnel centerline, and adjust the lifting mechanism again to make the steel lining segment descend to the appropriate position;

[0035] The railcar transports the steel lining segments to the location in the tunnel where they are to be installed;

[0036] Adjust the lifting mechanism according to the height of the tunnel lining to raise the steel lining segment to the appropriate position, and adjust the umbrella support mechanism to rotate the steel lining halves on both sides away from the tunnel centerline until they fit in with the tunnel lining to be repaired and reinforced;

[0037] Use locking anchors to lock the steel lining segment to the tunnel lining to be repaired and reinforced, and connect the two separated steel lining halves;

[0038] Separate the node plate of the lifting frame from the steel lining segment, and adjust the lifting mechanism to separate the steel lining segment from the installation stand;

[0039] The rail car and the installation platform drove out of the tunnel to wait for the installation of the next steel lining segment.

[0040] According to the tunnel steel lining installation construction method provided by the present invention, before fine-tuning the lifting mechanism and the umbrella support mechanism according to the height position of the steel lining segment to connect the umbrella support mechanism with the lifting frame, the method further includes:

[0041] Remove the rail car from the tracks by adjusting the adjustable feet and adjust the mounting platform to a horizontal position; and / or,

[0042] Before adjusting the lifting mechanism according to the height position of the tunnel lining so that the steel lining segment rises to a suitable position, and adjusting the umbrella support mechanism so that the steel lining halves on both sides rotate away from the tunnel centerline until they fit the tunnel lining to be repaired and reinforced, the method also includes:

[0043] The rail car is unseated from the tracks by adjusting the adjustable support feet and the mounting platform is adjusted to a horizontal position.

[0044] According to the tunnel steel lining installation construction method provided by the present invention, before the step of adjusting the lifting mechanism according to the height position of the tunnel lining so that the steel lining segment rises to a suitable position, and adjusting the umbrella support mechanism so that the steel lining halves on both sides rotate away from the tunnel centerline until they fit the tunnel lining to be repaired and reinforced, it also includes:

[0045] Fine-tune the mounting platform so that the centerline of the mounting platform is aligned with the centerline of the tunnel.

[0046] The tunnel steel lining installation system provided by the present invention comprises: a steel lining assembly, comprising a pair of steel lining halves symmetrically arranged about a tunnel centerline and matched with a tunnel lining, the pair of steel lining halves being detachably connected, and the pair of steel lining halves being reserved with locking holes for connecting to a tunnel lining to be repaired and reinforced; a lifting frame, used for lifting the steel lining assembly, and detachably connected to the steel lining assembly; an installation stand, used for installing the steel lining assembly on the tunnel lining to be repaired and reinforced, the pair of steel lining halves being located on both sides of the installation stand, the installation stand comprising an umbrella support mechanism and a lifting mechanism connected to the umbrella support mechanism, the lifting frame being detachably connected to the umbrella support mechanism, the umbrella support mechanism being used for driving the steel lining halves to rotate toward or away from the tunnel centerline, and the lifting mechanism being used for driving the umbrella support mechanism to move along the tunnel height direction; a rail vehicle, used for transporting the steel lining assembly to a position to be installed in the tunnel, and being movable along the tunnel length direction, and the installation stand being installed on the rail vehicle.

[0047] In this way, the steel lining components are assembled in advance outside the tunnel, then placed on the installation stand by the lifting frame, and transported to the installation position in the tunnel by the rail car. During the installation process, by adjusting the umbrella support mechanism and the lifting mechanism, the steel lining halves on both sides can be easily opened and moved into place until they fit the tunnel lining to be repaired and reinforced, and the steel lining is completely installed. In this way, the installation of the entire ring and section of the steel lining is completed within the time limit of the skylight, forming a new complete structural system. Once the steel lining is installed, the normal operation of the railway can be restored to ensure driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 It is a structural schematic diagram of the tunnel steel lining installation system provided by the present invention;

[0050] Figure 2 It is a structural schematic diagram of the steel lining assembly provided by the present invention;

[0051] Figure 3 is a three-dimensional diagram of a half body of a steel liner provided by the present invention;

[0052] Figure 4 is a three-dimensional diagram of an upper unit block provided by the present invention;

[0053] Figure 5 It is a three-dimensional diagram of the middle unit block provided by the present invention;

[0054] Figure 6 is a three-dimensional diagram of the lower unit block provided by the present invention;

[0055] Figure 7 is a stereogram of a steel liner segment provided by the present invention;

[0056] Figure 8 is a schematic diagram of the distribution of the locking anchor rods provided by the present invention;

[0057] Fig. 9 It is a distribution diagram of the positioning piers provided by the present invention;

[0058] Fig.10 It is a structural schematic diagram of the lifting frame provided by the present invention;

[0059] Fig.11 It is a partial front view of the lifting frame provided by the present invention;

[0060] Fig.12 It is a partial top view of the lifting frame provided by the present invention;

[0061] Fig.13 is a front view of the mounting stand provided by the present invention;

[0062] Fig.14 is a side view of the mounting stand provided by the present invention;

[0063] Fig.15 It is a comparative schematic diagram of the umbrella support mechanism provided by the present invention driving the steel lining half body before and after rotation;

[0064] Fig.16 It is a comparative schematic diagram of the lifting mechanism provided by the present invention driving the steel liner half body before and after it descends;

[0065] Reference numerals:

[0066] 1: Steel lining half body; 2: Lifting frame; 3: Installation stand;

[0067] 4: Railcar; 5: Positioning pier; 6: Locking anchor rod;

[0068] 7: Tunnel lining; 8: Tunnel centerline; 9: Contact network;

[0069] 10: Rail surface elevation;

[0070] 11: upper unit block; 12: middle unit block; 13: lower unit block;

[0071] 21: Node plate; 22: Connecting longitudinal beam; 23: Connecting cross beam;

[0072] 24: hanging lug;

[0073] 31: umbrella support mechanism; 32: lifting mechanism; 33: door-shaped bracket;

[0074] 311: Lifting beam; 312: Connecting beam; 313: Telescopic assembly;

[0075] 314: Support beam;

[0076] 321: platform beam; 322: lifting jack;

[0077] 41: guide rail;

[0078] 51: Positioning groove. DETAILED DESCRIPTION

[0079] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0080] Combine the following Figures 1 to 16 The tunnel steel lining installation system of the present invention is described.

[0081] like Figure 1 As shown, the embodiment of the present invention provides a tunnel steel lining installation system, including a steel lining assembly, a lifting frame 2, an installation stand 3, and a rail car 4. Specifically, as Figure 2 As shown, the steel lining assembly includes a pair of steel lining halves 1 symmetrically arranged about the tunnel centerline 8 and matching the tunnel inner contour, and its specific specifications are determined according to the size of the tunnel inner contour. Figure 3 As shown, the steel lining half 1 is arc-shaped and is composed of several standard plates, which can be processed by corrugated steel plates. Since the inner contour of the tunnel is a five-center circle with three different curvatures, the steel lining half 1 is spliced ​​by standard corrugated steel plates with different curvatures. Figures 4 to 6 As shown, from top to bottom, it includes an upper unit block 11, a middle unit block 12 and a lower unit block 13, which are assembled into two left and right steel lining halves 1. When each steel lining half 1 is spliced ​​outside the tunnel, the unit blocks can be directly welded. A pair of steel lining halves 1 are detachably connected to form a full-ring steel lining unit. Specifically, the top is connected with high-strength bolts. In order to speed up construction efficiency, multiple steel lining components are generally stacked and placed, and the joints between two adjacent steel lining components are welded, that is, the steel lining half 1 on the same side is welded and fixed. As shown in FIG. Figure 7 As shown, for ease of operation, the steel lining segments are formed by assembling them in a lying position, that is, laying them flat on the ground.

[0082] In addition, a pair of steel lining halves 1 are pre-set with locking holes, which provide reserved conditions for locking the steel lining on the original tunnel concrete lining surface to be repaired and reinforced. Specifically, the locking anchor rod 6 is used for fixed connection. The locking anchor rod 6 is used to withstand the positive and negative wind pressures of the piston wind generated by the running of the train acting on the steel lining. And the shear resistance of the locking anchor rod 6 is used to withstand the shear force generated between the steel liner and the tunnel lining 7 when the structure is deformed, forming a "surrounding rock (soil)-original lining-corrugated plate interaction common force system". Therefore, according to the structural calculation and shear resistance requirements, the required number, diameter and length of the locking anchor rods 6, as well as the grouting amount are determined and arranged. The locking anchor rod 6 is pre-installed in the anchor grouting hole on the inner wall of the tunnel, and its end protrudes out of the lining surface. When installing the steel lining half 1, the locking anchor rod 6 passes through the locking hole and is locked and fixed with a nut to position and install the steel lining half 1. As shown Figure 8 As shown, the locking anchor rods 6 are arranged in two rows, one above and one below, and the locking anchor rods 6 are evenly spaced along the length of the tunnel. The specific installation height and installation spacing are determined according to actual design requirements, and the locking anchor rods 6 can generally be pre-installed at the bottom and the middle and upper curvature change points.

[0083] The lifting frame 2 is used to lift the steel lining assembly, and is detachably connected to the steel lining assembly, such as bolted connection, etc. As an auxiliary device for lifting the steel lining assembly, it is easy to connect with a lifting device such as a gantry crane, etc., to lift the steel lining assembly, and then remove the lifting frame 2 after the installation is completed, which is convenient to operate.

[0084] The mounting stand 3 is used to install the steel lining assembly onto the original tunnel concrete lining to be repaired and reinforced, and a pair of steel lining halves 1 are symmetrically distributed on both sides of the mounting stand 3. The mounting stand 3 includes an umbrella support mechanism 31 and a lifting mechanism 32 connected to the umbrella support mechanism 31, and the lifting frame 2 is detachably connected to the umbrella support mechanism 31. The umbrella support mechanism 31 is used to drive the steel lining halves 1 to rotate toward the tunnel centerline 8 or away from the tunnel centerline 8, thereby driving the steel lining halves 1 on the left and right sides to fold inward or open outward. The lifting mechanism 32 is used to drive the umbrella support mechanism 31 to move along the tunnel height direction, thereby driving the steel lining halves 1 to move up and down.

[0085] The mounting platform 3 is mounted on the platform of the rail car 4. The rail car 4, together with the mounting platform 3 and the steel lining assembly, is transported to the location to be installed in the tunnel and can move along the length of the tunnel. The rail car 4 can adopt the existing common rail car structure, can travel on the rails, and has a braking function. It should be noted that Figure 1 As for the placement position of the tunnel steel lining installation system shown in the figure, the up and down direction in the figure is the tunnel height direction, the left and right direction is the tunnel width direction, and the direction perpendicular to the paper surface is the tunnel length direction.

[0086] With such arrangement, the steel lining components are assembled in advance outside the tunnel according to the tunnel contour, and most of the workload is completed, and the steel lining assembly work in the traditional tunnel is transferred to the outside of the tunnel in advance. Then, the whole ring and whole segment steel lining components assembled outside the tunnel are placed on the installation stand 3 through the lifting frame 2, and after folding and shrinking, the steel lining components are transported to the installation position in the tunnel through the rail car 4. During the installation process, by adjusting the umbrella support mechanism 31 and the lifting mechanism 32, the steel lining half bodies 1 on both sides can be easily opened and moved into place until they fit with the tunnel lining 7, and the steel lining is installed on the original concrete lining surface. In this way, the installation of the whole ring and whole segment steel lining is completed under the skylight time limit, forming a new complete structural system. In this way, the time and space conflict between the installation project in the tunnel and the normal operation of the railway is completely resolved. Once the steel lining is installed, the normal operation of the railway can be restored to ensure driving safety.

[0087] In the embodiment of the present invention, the tunnel steel lining installation system further comprises a set of positioning piers 5 for calibrating the steel lining assembly. The set of positioning piers 5 matches the inner contour of the tunnel, such as Fig. 9 As shown, two positioning piers 5 are symmetrically arranged about the tunnel centerline 8. The positioning piers 5 are cast by concrete, and part of them are located below the track surface elevation 10, that is, buried underground. Fig. 9 As shown, the top surface of the positioning pier 5 is provided with a positioning groove 51 for inserting the bottom of the steel lining assembly, and the positioning groove 51 can be a semicircular groove, so that the steel lining assembly can be hung on the positioning pier 5 and inserted into the positioning groove 51, thereby more accurately positioning the steel lining assembly. In order to place the steel lining assembly more stably and reliably, multiple groups of positioning piers 5 can generally be arranged along the length direction of the tunnel.

[0088] like Figures 10 to 12 As shown, the lifting frame 2 includes a pair of node plates 21, a pair of connecting longitudinal beams 22, a pair of connecting cross beams 23, and at least two lifting ears 24. The connecting longitudinal beams 22 and the connecting cross beams 23 can be made of standard I-beams. Specifically, the pair of node plates 21 are symmetrically arranged about the tunnel centerline 8 and matched with the steel liner half body 1, and the connecting end surface with the upper unit block 11 is arc-shaped. The pair of node plates 21 and the pair of steel liner half bodies 1 are detachably connected, such as bolted, to facilitate disassembly and assembly. The pair of connecting longitudinal beams 22 are spaced apart along the tunnel width direction, such as Fig.10 As shown, one side of a pair of connecting longitudinal beams 22 is connected to the node plate 21, and the other side is detachably connected to the umbrella support mechanism 31. Fig.12 As shown, a pair of connecting cross beams 23 are detachably connected between a pair of connecting longitudinal beams 22 and are arranged at intervals along the length direction of the tunnel, thereby forming a stable frame structure for lifting the steel lining assembly. Moreover, the connecting cross beams 23 are detachably arranged, so that they can be removed when transported into the tunnel to facilitate adjustment of the steel lining half body 1. Fig.11As shown, the lifting lug 24 is installed on the connecting beam 23 for connecting a lifting device, thereby facilitating the lifting of the steel lining assembly.

[0089] Reference Figures 13 to 16 The umbrella support mechanism 31 includes a lifting beam 311, a pair of connecting beams 312, a pair of telescopic components 313, and a pair of supporting beams 314. Fig.13 As shown, the lifting beam 311 is installed on the lifting mechanism 32, and a pair of connecting beams 312 are symmetrically arranged about the tunnel centerline 8 and hinged. At the same time, the connecting longitudinal beam 22 is connected to the connecting beam 312 to connect the lifting frame 2 to the umbrella support mechanism 31. A pair of telescopic components 313 are symmetrically arranged about the tunnel centerline 8 and perform telescopic movement along the tunnel height direction. The telescopic components 313 can adopt a two-way hydraulic cylinder or the like. One end of the telescopic component 313 is hinged to the connecting beam 312, and the other end is hinged to the lifting beam 311. One end of a pair of supporting beams 314 is hinged to one end of the telescopic component 313 close to the lifting beam 311, and the other end is hinged to one end of the connecting beam 312 away from the telescopic component 313.

[0090] In this way, the connecting beams 312, telescopic components 313 and support beams 314 on both sides form two hinged and stable triangular structures, and the telescopic components 313 are controlled to perform telescopic movements, thereby driving the steel lining half bodies 1 on both sides to rotate. Fig.15 As shown, the right telescopic component 313 contracts, driving the right steel lining half 1 to retract inward. Similarly, the left telescopic component 313 contracts, driving the left steel lining half 1 to retract inward. Thereby, the steel lining half 1 on both sides are folded and retracted, so that an opening is formed at the top of the steel lining half 1 to avoid interference with the contact network 9 during transportation into the tunnel. Then, after entering the tunnel and connecting with the tunnel lining 7, the right telescopic component 313 extends out, driving the right steel lining half 1 to expand outward. The left telescopic component 313 extends out, driving the left steel lining half 1 to expand outward. It should be noted that before adjusting the umbrella support mechanism 31, the steel lining half 1 on both sides needs to be disassembled and the connecting beam 23 on the lifting frame 2 removed.

[0091] In the embodiment of the present invention, the lifting mechanism 32 includes a platform beam 321 and a lifting jack 322. Fig.13 As shown, the platform crossbeam 321 is installed on the rail car 4, and the lifting jack 322 is installed on the platform crossbeam 321. The lifting jack 322 is used to drive the umbrella support mechanism 31 to move along the tunnel height direction, thereby driving the steel lining half bodies 1 on both sides to move up and down. Specifically, the lifting jack 322 is divided into two groups, which are symmetrically arranged on both sides of the tunnel center line 8, so that the steel lining half bodies 1 on both sides can be supported and driven to move up and down more stably and reliably. Fig.16As shown (for comparison, only the state after the position of the right side steel lining half body 1 is changed is shown), retract the right side lifting jack 322 to drive the right side steel lining half body 1 to descend. Similarly, retract the left side lifting jack 322 to drive the left side steel lining half body 1 to descend. Thereby, the overall center of gravity is lowered, which is convenient for stable transportation and can avoid collision with the contact network 9 in the tunnel when entering the tunnel. Accordingly, the right side lifting jack 322 is lifted to drive the right side steel lining half body 1 to rise. The left side lifting jack 322 is lifted to drive the left side steel lining half body 1 to rise, so that the connection and fixation of the steel lining half body 1 to the tunnel lining 7 can be achieved. In addition, as Fig.14 As shown, the umbrella support mechanism 31 and the lifting mechanism 32 are generally arranged in two groups along the length direction of the tunnel, with two in each group, so as to reliably drive the steel lining half body 1 to move.

[0092] Furthermore, the mounting platform 3 further includes a gate-shaped bracket 33, which is slidably connected to the rail vehicle 4 and moves along the length direction of the tunnel. Specifically, a wheel with a brake function is provided at the bottom of the gate-shaped bracket 33, which can slide on the guide rail 41 installed on the rail vehicle 4. Fig.14 As shown, when the steel lining assembly is transported to the installation location, the door-shaped bracket 33 can be moved forward and backward for fine adjustment to achieve positioning of the installation platform 3 so as to more accurately align the installation location. The platform crossbeam 321 is slidably connected to the door-shaped bracket 33 and moves along the width direction of the tunnel. For example, the relative movement between the platform crossbeam 321 and the door-shaped bracket 33 can be achieved by the cooperation of the slider and the slide rail or the cooperation of the wheel and the guide rail. At the same time, a limiter can be provided to ensure that no relative movement occurs after the movement is in place. Fig.13 As shown, by moving the stand crossbeam 321 left and right for fine adjustment, the center line of the umbrella support mechanism 31 is aligned with the tunnel center line 8, so that the steel lining assembly can be installed faster and more accurately.

[0093] In an embodiment of the present invention, the tunnel steel lining installation system also includes an adjustable support foot provided on the rail car 4. The adjustable support foot can adopt the existing common support foot code, which is used to adjust the height of the rail car 4, so that the rail car 4 is off the track, and the installation work load of the installation stand 3 is directly transmitted to the ground, ensuring the working stability of the installation stand 3. The installation stand 3 can also be adjusted to a horizontal posture, which is convenient for better installation of the steel lining assembly. There are multiple adjustable support feet, which are evenly arranged around the rail car 4. In this way, when the rail car 4 travels to the predetermined location, the adjustable support foot is lowered to make the wheels of the rail car 4 off the rails, so that the loads such as the installation stand 3 and the steel lining assembly are directly transferred to the foundation, thereby improving the overall stiffness of the system, ensuring its overall working stability, and improving the assembly accuracy of the steel lining. When it is necessary to leave, lift the adjustable support foot to make the wheels contact the rails.

[0094] The tunnel steel lining installation construction method provided by the present invention is described below. The tunnel steel lining installation construction method described below and the tunnel steel lining installation system described above can be referenced to each other.

[0095] The embodiment of the present invention also provides a tunnel steel lining installation construction method, comprising the following steps:

[0096] S1: Assemble steel lining components outside the tunnel, each steel lining component includes a pair of steel lining halves 1, and the pair of steel lining halves 1 are detachably connected by bolts to form a full-ring steel lining unit.

[0097] S2: Multiple full-ring steel lining units are stacked and connected in sequence to form a steel lining segment, wherein the steel lining halves 1 on the same side of two adjacent steel lining units are welded and connected, and multiple steel lining segments can be assembled. Thus, most of the assembly work is completed in advance outside the tunnel, which facilitates the subsequent acceleration of construction in the tunnel. In addition, the specific number of steel lining units contained in each steel lining segment needs to be determined according to actual conditions.

[0098] S3: Connect the node plate 21 of the lifting frame 2 to the steel lining segment, and connect the lifting device to the lifting frame 2. Lift the steel lining segment to the positioning pier 5 through the lifting device, so that the lower end of the steel lining segment falls into the positioning groove 51 on the top surface of the positioning pier 5. Thus, pre-installation is performed outside the tunnel, and the assembly accuracy is calibrated.

[0099] S4: The rail vehicle 4 together with the installation platform 3 drives in and parks under the steel lining segment on the positioning pier 5, so that the center line of the rail vehicle 4 coincides with the center line of the steel lining.

[0100] S5: fine-adjust the lifting mechanism 32 and the umbrella support mechanism 31 according to the height position of the steel lining segment to connect the umbrella support mechanism 31 to the lifting frame 2.

[0101] S6: Remove the connecting bolts on the top of the steel lining half bodies 1 on both sides, separate the steel lining half bodies 1 on both sides, and remove the connecting cross beam 23 on the lifting frame 2.

[0102] S7: Adjust the lifting mechanism 32 and operate the lifting jack 322 to raise the steel lining segment to detach from the positioning pier 5. Then adjust the umbrella support mechanism 31 and retract the two-way hydraulic cylinders on both sides to rotate the steel lining halves 1 on both sides around the rotation center of the mechanism toward the tunnel centerline 8 by a certain angle to form an opening at the top. Adjust the lifting mechanism 32 again and retract the lifting jack 322 to lower the steel lining segment folded toward the center to a suitable position. Among them, the size of the top opening and the lowering height are related to the position of the contact network 9 in the tunnel, so it is advisable to avoid the contact network 9 to prevent the folded and lowered steel lining segment from colliding with the tunnel wall or the contact network during transportation.

[0103] S8: The rail vehicle 4 transports the folded and lowered steel lining segment to the location to be installed in the tunnel.

[0104] S9: Adjust the lifting mechanism 32 according to the height of the tunnel lining 7, and operate the lifting jack 322 to lift the steel lining half bodies 1 on both sides to a suitable position. Then adjust the umbrella support mechanism 31, extend the two-way hydraulic cylinders on both sides, and make the raised steel lining half bodies 1 on both sides rotate around the rotation center of the mechanism in a direction away from the tunnel centerline 8, closing the top opening until it fits with the tunnel lining 7 to be repaired and reinforced.

[0105] S10: At this time, the locking anchor rod 6 pre-installed in the tunnel passes through the locking hole on the steel lining half body 1, and a washer is installed at the end of the locking anchor rod 6 and the nut is tightened to lock the steel lining segment on the original tunnel concrete lining. Then the tops of the steel lining half bodies 1 on both sides are connected with bolts.

[0106] S11: separate the node plate 21 of the lifting frame 2 from the steel liner segment, then adjust the lifting mechanism 32 and retract the lifting jack 322 to separate the steel liner segment from the mounting stand 3.

[0107] S12: The rail vehicle 4 together with the installation stand 3 drives out of the tunnel, and the installation of one steel lining segment is completed, waiting for the installation of the next steel lining segment.

[0108] In the embodiment of the present invention, before the lifting mechanism 32 and the umbrella support mechanism 31 are finely adjusted according to the height position of the steel lining segment in step S5 to connect the umbrella support mechanism 31 to the lifting frame 2, the process further includes: lifting the rail vehicle 4 by adjusting the adjustable support feet to separate the wheels and rails of the rail vehicle 4, and adjusting the installation stand 3 to a horizontal posture. Specifically, after the rail vehicle 4 stops under the steel lining segment at the positioning pier 5, the adjustable support feet are lowered to separate the wheels and rails, so that the working load of the installation stand 3 is directly transmitted to the ground. When leaving the place, the adjustable support feet are retracted to make the wheels and rails contact.

[0109] In step S9, the lifting mechanism 32 is adjusted according to the height position of the tunnel lining 7 so that the steel lining segment rises to a suitable position, and the umbrella support mechanism 31 is adjusted so that the steel lining half bodies 1 on both sides rotate away from the tunnel centerline 8 until they fit the tunnel lining 7 to be repaired and reinforced. It also includes: lifting the railcar 4 by adjusting the adjustable support feet so that the wheels and rails of the railcar 4 are separated, and adjusting the installation stand 3 to a horizontal posture. Specifically, after the railcar 4 stops at the position to be installed in the tunnel, the adjustable support feet are lowered to separate the wheels and rails, so that the working load of the installation stand 3 is directly transmitted to the ground. When leaving the tunnel, the adjustable support feet are retracted to make the wheels and rails contact.

[0110] In the embodiment of the present invention, in step S9, the lifting mechanism 32 is adjusted according to the height position of the tunnel lining 7 so that the steel lining segment rises to a suitable position, and the umbrella support mechanism 31 is adjusted so that the steel lining half bodies 1 on both sides rotate away from the tunnel center line 8 until they are in contact with the tunnel lining 7 to be repaired and reinforced, and the installation stand 3 is finely adjusted so that the center line of the installation stand 3 is aligned with the tunnel center line 8. Specifically, Fig.14 As shown, along the length direction of the tunnel, the mounting stand 3 moves forward and backward on the guide rail 41, and the mounting stand 3 is fine-tuned for precise positioning. Fig.13 As shown, along the tunnel width direction, the platform crossbeam 321 is moved left and right, and the umbrella support mechanism 31 and the lifting mechanism 32 are fine-tuned to accurately align with the tunnel centerline 8. This achieves positioning and centering, and ensures the installation accuracy of the steel lining segment.

[0111] In summary, the present invention provides a tunnel steel lining installation system and construction method, which can pre-assemble the steel lining outside the railway tunnel to reduce the workload in the tunnel, and then fold and lower it and transport it to the installation position in the tunnel, and use the skylight time to quickly complete the overall installation of the steel lining in the tunnel, which greatly improves the construction speed, eliminates the safety hazards brought by traditional local repairs, and ensures driving safety. In this way, most of the engineering workload in the traditional steel lining installation project is moved from the tunnel to the outside of the tunnel for pre-processing, so that the installation workload in the tunnel is reduced to within the range allowed by the skylight restriction conditions, and a new feasible method is proposed to completely solve the time and space conflict between the construction of tunnel maintenance and renovation projects and the normal operation of the railway, and a set of supporting construction process equipment and solutions are developed, which creates a precedent for the implementation of steel lining installation projects under operating conditions.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tunnel steel lining installation system, characterized in that: include: The steel lining assembly comprises a pair of steel lining halves symmetrically arranged about the tunnel centerline and matched with the inner contour of the tunnel, wherein the pair of steel lining halves are detachably connected, and the pair of steel lining halves are provided with locking holes for connecting the tunnel lining to be repaired and reinforced; A lifting frame, used for lifting the steel lining assembly and detachably connected to the steel lining assembly; A mounting stand is used to mount the steel lining assembly onto the tunnel lining to be repaired and reinforced, a pair of the steel lining halves are located on both sides of the mounting stand, the mounting stand comprises an umbrella support mechanism and a lifting mechanism connected to the umbrella support mechanism, the lifting frame is detachably connected to the umbrella support mechanism, the umbrella support mechanism is used to drive the steel lining halves to fold and contract toward the tunnel centerline, or to expand and open away from the tunnel centerline, and the lifting mechanism is used to drive the umbrella support mechanism to move in the tunnel height direction; A rail car, used to transport the steel lining assembly to a location to be installed in the tunnel, and capable of moving along the length direction of the tunnel, the installation platform being installed on the rail car; It also includes a group of positioning piers for calibrating the steel lining assembly, wherein the group of positioning piers matches the inner contour of the tunnel and is provided with positioning grooves for the bottom of the steel lining assembly to be inserted; The lifting frame comprises: A pair of node plates, symmetrically arranged about the tunnel centerline and matched with the steel lining half bodies, wherein the pair of node plates are detachably connected to the pair of steel lining half bodies; A pair of connecting longitudinal beams are arranged at intervals along the width direction of the tunnel, one side of the pair of connecting longitudinal beams is connected to the node plate, and the other side is detachably connected to the umbrella support mechanism; A pair of connecting cross beams are detachably connected between the pair of connecting longitudinal beams and are arranged at intervals along the length direction of the tunnel. At least two lifting eyes for connecting lifting equipment; The umbrella support mechanism comprises: A lifting beam installed on the lifting mechanism; A pair of connecting beams, symmetrically arranged about the tunnel centerline and hinged to each other, the connecting longitudinal beams being connected to the connecting beams; A pair of telescopic components are symmetrically arranged about the tunnel centerline and perform telescopic movement along the tunnel height direction, one end of the telescopic component is hinged to the connecting beam, and the other end is hinged to the lifting beam; A pair of support beams, one end of the pair of support beams is hinged to one end of the telescopic assembly close to the lifting beam, and the other end is hinged to one end of the connecting beam away from the telescopic assembly.

2. The tunnel steel lining installation system according to claim 1, characterized in that: The lifting mechanism comprises: a platform crossbeam mounted on the rail car; A lifting jack is arranged on the platform crossbeam and is used to drive the umbrella support mechanism to move along the height direction of the tunnel.

3. The tunnel steel lining installation system according to claim 2, characterized in that: The mounting platform also includes a gate-shaped bracket, the platform crossbeam is slidably connected to the gate-shaped bracket and moves along the width direction of the tunnel, and the gate-shaped bracket is slidably connected to the rail car and moves along the length direction of the tunnel.

4. The tunnel steel lining installation system according to claim 3, characterized in that: It also includes adjustable support feet arranged on the rail car, and the adjustable support feet are used to adjust the height of the rail car so that the rail car can be detached from the track and the mounting platform can be adjusted to a horizontal posture.

5. A tunnel steel lining installation construction method, characterized in that: The tunnel steel lining installation system according to claim 4 comprises the following steps: Assembling a steel lining assembly outside the tunnel, the steel lining assembly comprising a pair of steel lining halves, connecting the pair of steel lining halves to form a full-ring steel lining unit; Multiple full-ring steel lining units are stacked and connected in sequence to form a steel lining segment; Connect the node plate of the lifting frame to the steel lining segment, connect the lifting device to the lifting frame, and lift the steel lining segment to the positioning pier through the lifting device; The rail car drives under the steel liner segment placed on the positioning pier; Fine-tune the lifting mechanism and the umbrella support mechanism according to the height position of the steel lining segment to connect the umbrella support mechanism with the lifting frame; Separate the steel lining halves on both sides and remove the connecting beams on the lifting frame; Adjust the lifting mechanism to make the steel lining segment rise to the position away from the positioning pier, and adjust the umbrella support mechanism to make the steel lining halves on both sides rotate towards the tunnel centerline, and adjust the lifting mechanism again to make the steel lining segment descend to the appropriate position; The railcar transports the steel lining segments to the location in the tunnel where they are to be installed; Adjust the lifting mechanism according to the height of the tunnel lining to raise the steel lining segment to the appropriate position, and adjust the umbrella support mechanism to support and rotate the steel lining halves on both sides until the steel lining fits the tunnel lining to be repaired and reinforced; Use locking anchors to lock the steel lining segment to the tunnel lining to be repaired and reinforced, and connect the two separated steel lining halves; Separate the node plate of the lifting frame from the steel lining segment, and adjust the lifting mechanism to separate the steel lining segment from the installation stand; The rail car and the installation platform drove out of the tunnel to wait for the installation of the next steel lining segment.

6. The tunnel steel lining installation construction method according to claim 5 is characterized in that: Before fine-tuning the lifting mechanism and the umbrella support mechanism according to the height position of the steel lining segment to connect the umbrella support mechanism to the lifting frame, the method further includes: Remove the rail car from the tracks by adjusting the adjustable feet and adjust the mounting platform to a horizontal position; and / or, The lifting mechanism is adjusted according to the height position of the tunnel lining to raise the steel lining segment to a suitable position, and the umbrella support mechanism is adjusted to open and rotate the steel lining halves on both sides until the steel lining fits the tunnel lining to be repaired and reinforced.

7. The tunnel steel lining installation construction method according to claim 5 is characterized in that: Before adjusting the lifting mechanism according to the height position of the tunnel lining so that the steel lining segment rises to a suitable position, and adjusting the umbrella support mechanism to open and rotate the steel lining halves on both sides until the steel lining fits the tunnel lining to be repaired and reinforced, the method also includes: Fine-tune the mounting platform so that the centerline of the mounting platform is aligned with the centerline of the tunnel.

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