A method for muck removal and transportation in a variable cross-section tunnel with four anchor rails and three tracks.

Abstract

This invention discloses a four-track, three-line method for muck removal and transportation in variable cross-section tunnel anchors. For tunnel anchors with steep axial inclination angles, four shared tracks are used to form three lines: one is a large-gauge integrated equipment and material transport line, and two are small-gauge circulating muck removal lines. First, the integrated equipment and material transport line, driven by a power mechanism, pulls a transport platform to transport the relevant equipment and materials for excavation at the tunnel face. Near the tunnel face, the excavation equipment is unloaded for excavation. The excavated muck is then circulated and removed using the dual-circulation muck removal lines, driven by a power mechanism and circulated by mine cars. This allows excavation and muck removal to be carried out simultaneously, significantly improving muck removal efficiency. After excavation, the transport platform returns to the outside of the tunnel anchor to load support materials before returning to the tunnel face. The entire transportation process involves fewer transfer steps, improving construction efficiency and reducing environmental pollution. The transport platform and mine cars are driven by power mechanisms and run along the tracks, resulting in a higher safety factor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway engineering slope protection and bridge end anchorage construction. More specifically, the present application relates to a slagging and transporting method for a four-track three-wire variable cross-section tunnel anchor. BACKGROUND

[0002] A tunnel anchor is a kind of anchorage structure that can make good use of the geological conditions of the anchorage site, has relatively small engineering quantity (the volume is only 20%-25% of that of a gravity anchor), has high cost performance, and has small disturbance to the surrounding environment, and is often used for suspension bridges on mountainous highways.

[0003] Four independent tunnel anchor anchorage structures are arranged at the south and north ends of a certain large bridge, as shown in the accompanying drawings. Figure 1 As shown in the drawings, the south and north tunnel anchors 1 are composed of a main cable passing section 2, an anchorage spread saddle foundation 3, a front anchor chamber 4, an anchor plug body, and a rear anchor chamber. The four main cable passing sections, the tunnel spread saddle foundation, the front anchor chamber, the anchor plug body, and the rear anchor chamber are all of the same size. The surrounding rock of the two tunnel anchors on the south bank has poor geological conditions, with developed cataclastic rock, long hole body, steep inclination, large cross section, and large size. The cross section of the tunnel anchor anchorage is conical, the axis has a steep inclination, and the variable cross section continuously changes from a small cross section to a large cross section. The surrounding rock not only bears the convergence deformation during excavation, but also bears the bolt extrusion deformation during the main cable stress stage, so the stability of the surrounding rock is high. The tunnel anchor is long in depth, the axis has a steep inclination, and the excavation cross section is large, so the selection of the slagging and transporting scheme has a great influence on the construction period.

[0004] At present, the materials required for tunnel anchor excavation, slagging, and support reinforcement are generally transported by single-track transportation, trackless transportation, and continuous belt conveyor. The average slagging efficiency of single-track transportation is 16 m 3 / h, there are risks of derailment of mine cars, out-of-control winches, and broken steel wires, and certain measures need to be taken; trackless transportation has high safety risks and cannot be used on steep slopes; continuous belt conveyors are not easy to implement on steep slopes, have large noise pollution and dust, and need to take dust reduction measures, which has a large construction cost. SUMMARY

[0005] An object of the present application is to solve at least the above problems and provide at least the advantages to be described later.

[0006] Another object of the present application is to provide a slagging and transporting method for a four-track three-wire variable cross-section tunnel anchor to solve the technical problem of low efficiency of slagging and transporting of steep tunnel anchors in the prior art.

[0007] In order to achieve these objects and other advantages according to the present application, a slagging and transporting method for a four-track three-wire variable cross-section tunnel anchor is provided, comprising the following steps:

[0008] S1, a steel operation platform is arranged at the opening of the tunnel anchor;

[0009] S2, a gantry crane and a power mechanism are fixedly installed on the steel operation platform;

[0010] S3, after the filling construction of the inverted arch in the large-inclination tunnel anchor is completed, four parallel tracks are arranged on the ground in the tunnel anchor along the extension direction of the tunnel anchor, wherein two tracks with the largest spacing form a comprehensive equipment and material transportation line, and two non-intersecting circulating slag discharge lines are formed between every two adjacent tracks.

[0011] S4, a comprehensive transportation platform is arranged on the steel operation platform, the comprehensive transportation platform is connected to the power mechanism through a main cable, an excavator device is placed on the comprehensive transportation platform, and the excavator device is transported to the working face along the comprehensive equipment and material transportation line by the power mechanism, and a mine car is arranged behind the comprehensive transportation platform on the two circulating slag discharge lines.

[0012] S5, after the excavator device reaches the working face, excavation construction is performed, and the mine car is used to load slag.

[0013] S6, a slag unloading area is arranged outside the opening of the tunnel anchor, and the mine car is used to unload slag in the slag unloading area.

[0014] S7, after the slag discharge at the working face is completed, the comprehensive transportation platform is pulled back to the comprehensive transportation platform by the power mechanism, the gantry crane places supporting materials on the comprehensive transportation platform, and then moves to the working face to perform primary support construction on the working face.

[0015] Preferably, the gantry crane is provided with two sets, wherein the first set of the gantry crane is used to hoist the comprehensive transportation platform to the steel operation platform and hoist the supporting materials to the comprehensive transportation platform outside the opening of the tunnel anchor, and the second set of the gantry crane is used to hoist the excavator device to the comprehensive transportation platform outside the opening of the tunnel anchor.

[0016] Preferably, after the filling construction of the inverted arch in the main cable passing section of the large-inclination tunnel anchor is completed, four tracks are arranged on the ground in the tunnel anchor along the extension direction of the tunnel anchor, the four tracks are parallel to each other and equally spaced, wherein two tracks with the largest spacing form a comprehensive equipment and material transportation line, and two circulating slag discharge lines are formed between every two adjacent tracks with the smallest spacing.

[0017] Preferably, a pedestrian passage is further arranged on the ground in the tunnel anchor along the length direction of the tunnel anchor, and the four tracks and the pedestrian passage are located on both sides of the length direction of the tunnel anchor.

[0018] Preferably, the tracks are sequentially connected in the length direction by steel segments with a length of 3 meters.

[0019] Preferably, the upper surface of the steel structure platform is further provided with a docking platform, the slag unloading area is arranged on one side of the docking platform, a slag transport vehicle is arranged in the slag unloading area, the top surface of the docking platform is higher than the height of the slag transport vehicle, the mine car is a side inclined hydraulic tipping mine car, a raised platform is arranged between the docking platform and the ground at the opening of the tunnel anchor, the upper surface of the raised platform is inclined, the upper end of the upper surface of the raised platform is smoothly connected to the upper surface of the docking platform, and the lower end of the upper surface of the raised platform is smoothly connected to the ground at the opening of the tunnel anchor, and the rail extends to the raised platform and the upper surface of the docking platform in sequence from the end of the rail towards the outside of the tunnel anchor;

[0020] In step S6, before the mine car reaches the opening of the tunnel anchor to unload the slag, a docking platform is arranged on the steel structure platform near the slag unloading area, a raised platform is fixed between the docking platform and the opening of the tunnel anchor, and the tunnel is connected to the steel segment on the docking platform to raise the rail, and then the mine car is driven along the connected rail to the docking platform to unload the slag.

[0021] Preferably, the steel structure platform comprises:

[0022] The foundation structure comprises drill hole piles arranged at the opening of the tunnel anchor on the outside and enlarged foundations arranged near the opening of the tunnel anchor on one side, the drill hole piles are formed by rotary drilling on the outside of the opening of the tunnel anchor and arranged away from the opening of the tunnel anchor on one side;

[0023] The support frame is connected to the top of all the drill hole piles and enlarged foundations, the support frame comprises vertically arranged steel columns, cross ties and diagonal braces connected between adjacent steel columns, the lower end of the steel column is connected to a drill hole pile or an enlarged foundation, and the upper end of all the steel columns is at the same horizontal height and connected to horizontally arranged distribution beams upward;

[0024] The platform plate has horizontally arranged Bailey beams at the lower end, the Bailey beams are connected to the top of all the distribution beams, and horizontally arranged steel plates are connected to the top of all the Bailey beams upward, the gantry crane and the power mechanism are fixed to the steel plates.

[0025] Preferably, the comprehensive transportation platform comprises a base, the bottom of the base is provided with traveling wheels, the traveling wheels are slidably connected to the corresponding side of the rail, a bracket is arranged on the base, one end of the bracket towards the outside of the tunnel anchor is hinged to the base, a hydraulic rod is connected between the other end of the bracket towards the inside of the tunnel anchor and the corresponding end of the base, the hydraulic rod is used to change the height of the corresponding end of the bracket relative to the base after being extended or retracted, when the comprehensive transportation platform is transported to the inside of the tunnel anchor along the rail, the extension or retraction of the hydraulic rod is operated to make the equipment or materials on the comprehensive transportation platform be at a relatively horizontal position as the slope in the tunnel anchor changes.

[0026] The present application at least includes the following advantages:

[0027] (1) The slagging and transporting method for the variable cross-section tunnel anchor four-track three-line of the present application can simultaneously excavate and slag, significantly reduces the transportation link, and the average slagging efficiency is 36m / h, which is significantly improved compared with the single-track transporting and continuous belt machine slagging efficiency, has energy-saving effect and small and controllable pollution range. 3

[0028] (2) The slagging and transporting method for the variable cross-section tunnel anchor four-track three-line of the present application can be applied to the steep slope section construction of the tunnel anchor, and solves the problem that the trackless transporting and continuous belt machine excavation and slagging cannot be implemented in the traditional method.

[0029] (3) Compared with the trackless transporting, the slagging and transporting method for the variable cross-section tunnel anchor four-track three-line of the present application can adaptively install the track and adjust the bearing surface direction of the comprehensive transporting platform according to the steepness of the tunnel anchor, and has high overall safety factor.

[0030] Other advantages, objects and features of the present application will be partly embodied by the following description, and will be partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic view of the steel structure platform of the present application;

[0032] Figure 2 It is a schematic view of the arrangement of the circulating slagging line arranged when the double mine cars slag in the tunnel cross-section direction;

[0033] Figure 3 It is a schematic view of the line in the tunnel anchor hole when the double mine cars slag;

[0034] Figure 4 It is a schematic view of the line in the tunnel anchor hole of the comprehensive transporting platform of the present application.

[0035] The description of the drawings: 1, tunnel anchor, 2, main cable passing section, 3, anchor spread saddle foundation, 4, front anchor chamber, 5, drilled pile foundation, 6, enlarged foundation, 7, steel column, 8, inclined brace, 9, flat link, 10, distribution beam, 11, Bailey beam, 12, steel plate, 13, first set of gantry crane, 14, second set of gantry crane, 15, power mechanism, 16, main cable, 17, mine car, 18, track, 19, excavator equipment, 20, comprehensive transporting platform, 21, pedestrian passageway, 22, butt joint platform, 23, heightening platform, 24, slag transporting car, 25, base, 26, walking wheel, 27, bracket, 28, hydraulic rod. DETAILED DESCRIPTION ​

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0037] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] like Figures 1-4 As shown, the present invention provides a method for muck removal and transportation in a variable cross-section tunnel with four anchor rails and three tracks, comprising the following steps:

[0039] S1. A steel working platform is installed at the entrance of tunnel anchor 1. Before construction, the platform foundation is designed according to the design and geological survey data and the site topography. Platform panels are then installed on the platform foundation to form a steel working platform.

[0040] S2. Fix the gantry crane and power mechanism 15 on the steel working platform. The gantry crane can lift CAT336 excavators with a bucket capacity of 2.1 cubic meters and PC200 excavators with a bucket capacity of 1.5 cubic meters. Install the power mechanism 15, such as a winch, at a suitable position on the steel working platform.

[0041] S3. After the invert arch filling construction of the tunnel anchor 1 with a large inclination angle is completed, four parallel tracks 18 are laid on the ground inside the tunnel anchor 1 along the extension direction of the tunnel anchor 1. Among them, the two tracks 18 with the largest spacing form a comprehensive equipment and material transportation line, and two non-intersecting circulating muck discharge lines are formed between the two adjacent tracks 18.

[0042] S4. A comprehensive transportation platform 20 is set up on the steel working platform. The comprehensive transportation platform 20 is connected to the power mechanism 15 via a main cable 16. Excavators 19 are placed on the comprehensive transportation platform 20 and are pulled by the power mechanism 15 to transport materials to the working face along the comprehensive equipment and material transportation line. At the same time, mine cars 17 are set up on two circulating slag removal lines to follow behind the comprehensive transportation platform 20. Of course, the comprehensive equipment and material transportation line can also transport other required construction equipment and materials. Each mine car 17 is individually connected to an intelligent CNC winch of the power mechanism 15. The mine car 17 is 6m long. 3Side unloading hydraulic tipping mine car 17 (KZ1FY-6 type) is connected with corresponding comprehensive transport platform 20, excavator, mine car 17 and the like to provide power through main cable 16 winch.

[0043] S5, excavator equipment 19 reaches the working face and carries out excavation construction, and mine car 17 is used to load slag.

[0044] S6, a slag unloading area is arranged outside the hole of tunnel anchor 1, mine car 17 reaches the slag unloading area after loading slag at the working face to unload slag, and mine car 17 is used to move in such a cycle.

[0045] S7, after the current working face is unloaded, comprehensive transport platform 20 is pulled back to the comprehensive transport platform 20 through power mechanism 15, gantry crane places supporting materials such as steel arch and anchor rod on the comprehensive transport platform 20 and then moves to the working face to carry out primary support construction on the working face.

[0046] Four tracks 18 are laid in tunnel anchor 1 with steep axis inclination to form three lines, one is a comprehensive equipment and material transport line with large track gauge, two are circulating slag unloading lines with small track gauge, four tracks 18 are used, and fixed pulleys are arranged at positions where tracks 18 do not hinder the movement of comprehensive transport platform 20 and mine car 17 to guide main cable 16 to change the traction angle, first, comprehensive equipment and material transport line is used to pull comprehensive transport platform 20 to transport related equipment and materials of the working face excavation by power mechanism 15, enter the vicinity of the working face, unload the excavation equipment to carry out excavation, and the obtained slag is unloaded by power mechanism 15 through double circulating slag unloading line to circulate mine car 17 to unload slag, so that the excavation and unloading processes can be carried out at the same time, and the average unloading efficiency is 36 m 3 / h, which is much higher than the unloading efficiency of existing technologies such as single-track transport and continuous belt conveyor, after the completion of excavation construction, comprehensive transport platform 20 returns to the outside of the hole of tunnel anchor 1, loads supporting materials and then returns to the working face to carry out supporting operation, comprehensive transport platform 20 and mine car 17 are pulled by power mechanism 15 and move along tracks 18, the safety factor is higher, the material or slag transportation link is reduced, the construction efficiency is improved, the construction cost is reduced, and the environmental pollution is small.

[0047] In another technical solution, as shown in Figure 1 , the gantry crane is provided with two sets, wherein the first set of gantry crane 13 is used to hoist comprehensive transport platform 20 to steel operation platform and hoist supporting materials to comprehensive transport platform 20 outside the hole of tunnel anchor 1, and the second set of gantry crane 14 is used to hoist excavator equipment 19 to comprehensive transport platform 20 outside the hole of tunnel anchor 1.

[0048] On the steel operation platform, a 80t and a 40t gantry crane are installed, the 80t gantry crane is used for transporting a CAT336 excavator with a bucket capacity of 2.1m3 and a PC200 excavator with a bucket capacity of 1.5m3 to the comprehensive transportation platform 20, and the 40t gantry crane is used for hoisting and transporting materials such as the comprehensive transportation platform 20 and the arch. The two different specifications of gantry cranes can hoist components of different forms and weights, improve hoisting efficiency and utilization rate, and reduce construction cost.

[0049] In another technical solution, as shown in Figures 2-4 After the main cable passing section 2 of the tunnel anchor 1 is filled and constructed, four tracks 18 are arranged on the ground in the tunnel anchor 1 along the extension direction of the tunnel anchor 1, the four tracks 18 are parallel to each other and have equal spacing, and two tracks 18 with the largest spacing form a comprehensive equipment and material transportation line, and two tracks 18 with the smallest spacing form two circulating slag lines.

[0050] The track gauge of the track 18 is set to 0.9m, and the four tracks 18 in each tunnel anchor 1 hole form a comprehensive equipment and material transportation line with a track gauge of 2.7m and two circulating slag lines with a track gauge of 0.9m, which reasonably utilizes the space, improves the transportation capacity, and effectively reduces the number of reverse transportation.

[0051] In another technical solution, as shown in Figure 2 On the ground of the tunnel anchor 1, a pedestrian passage 21 is also arranged along the length direction of the tunnel anchor 1, and the four tracks 18 are located on both sides of the pedestrian passage 21 in the length direction of the tunnel anchor 1. This facilitates the entry and exit of construction personnel into the tunnel anchor 1 and improves the safety factor.

[0052] In another technical solution, the track 18 is sequentially connected by steel segments with a length of 3m along the length direction. The steel segments are composed of profiled steel, which facilitates assembly and disassembly according to needs.

[0053] In another technical solution, as shown in Figures 3-4 The upper surface of the steel structure platform is also provided with a docking platform 22, the unloading area is arranged on one side of the docking platform 22, the unloading area is provided with a slag transport vehicle 24, the top surface of the docking platform 22 is higher than the height of the slag transport vehicle 24, the mine car 17 is a side inclined hydraulic tipping mine car 17, a raised platform 23 is transitionally connected between the docking platform 22 and the ground at the opening of the tunnel anchor 1, the upper surface of the raised platform 23 is inclined and smoothly transitions at the upper end with the upper surface of the docking platform 22 and at the lower end with the ground at the opening of the tunnel anchor 1, and one end of the track 18 extending towards the outside of the tunnel anchor 1 is sequentially connected to the upper surface of the raised platform 23 and the docking platform 22.

[0054] In step S6, before the ore car 17 reaches the outside of the tunnel anchor 1 hole for unloading, a docking platform 22 is arranged on the steel structure platform near the unloading area, a raised platform 23 is fixed between the docking platform 22 and the outside of the tunnel anchor 1 hole, the tunnel is connected to the docking platform 22, the track 18 is raised, and then the ore car 17 is driven along the connected track 18 to the docking platform 22 for unloading.

[0055] When the comprehensive transportation platform 20 and the ore car 17 are first pulled into the tunnel anchor 1 hole, the docking platform 22, the raised platform 23, and the connected track 18 are not arranged, and when the ore car 17 is ready to unload towards the outside of the tunnel anchor 1 hole, the docking platform 22, the raised platform 23, the unloading area, and the connected track 18 are arranged accordingly, and the track 18 is raised to facilitate unloading of the ore car 17.

[0056] In another technical solution, as shown in Figure 1 、 Figure 3 、 Figure 4 The steel structure platform comprises:

[0057] The foundation structure comprises drilled pile foundations 5 arranged at the outside of the tunnel anchor 1 hole and enlarged foundations 6 arranged near one side of the tunnel anchor 1 hole, and the drilled pile foundations 5 are formed by rotary drilling outside the tunnel anchor 1 hole and arranged away from one side of the tunnel anchor 1 hole;

[0058] The support frame is connected to the top of all drilled pile foundations 5 and enlarged foundations 6, and comprises vertically arranged steel columns 7, horizontal connections 9 and inclined braces 8 connected between adjacent steel columns 7, the lower end of the steel column 7 is connected to a drilled pile foundation 5 or an enlarged foundation 6, and the upper end of all steel columns 7 is at the same horizontal height and is connected to a horizontally arranged distribution beam 10;

[0059] The platform plate has a lower end in the form of a horizontally arranged Bailey beam 11 connected to the top of all distribution beams 10, and the top of all Bailey beams 11 is connected to a horizontally arranged steel plate 12, and the gantry crane and the power mechanism 15 are fixed to the steel plate 12.

[0060] According to the field topography, φ1500mm drill pile foundation 5 is formed by rotary drilling on the side far away from the tunnel anchor 1, and enlarged foundation 6 is used on the side close to the tunnel anchor 1 mountain. The enlarged foundation 6 is a kind of foundation form that the load from the pier (abutment) and the upper structure is directly transmitted to the relatively shallow supporting foundation by the enlarged foundation 6, which is generally constructed by the method of open excavation, so it is also called open excavation enlarged foundation 6 or shallow foundation. After the completion of the foundation structure, φ1000×12 steel columns 7, flat link 9 φ426×6, inclined brace 8, Bailey beam 11321, distribution beam 10, and 10mm thick pattern steel plate 12 are sequentially completed from bottom to top. The distribution beam 10 generally includes transverse distribution beam 10 work 25a@750 and longitudinal distribution beam 10 work 14@300. The whole steel structure platform meets the construction load bearing capacity requirements, and has a large area range to place the gantry crane, other docking platforms 22 and other structures.

[0061] In another technical solution, as shown in Figure 4 The comprehensive transportation platform 20 includes a base 25, the bottom of the base 25 is provided with walking wheels 26, the walking wheels 26 are in sliding connection with the corresponding side of the track 18, the base 25 is provided with a bracket 27, one end of the bracket 27 towards the outside of the tunnel anchor 1 is hinged to the base 25, and the other end of the bracket 27 towards the inside of the tunnel anchor 1 is connected with the base 25 through a hydraulic rod 28, the hydraulic rod 28 is used to change the height of the corresponding end of the bracket 27 relative to the base 25 after extension and contraction, when the comprehensive transportation platform 20 is transported to the inside of the tunnel anchor 1 along the track 18, the extension and contraction of the hydraulic rod 28 is operated according to the change of the slope inside the tunnel anchor 1, so that the equipment or materials on the comprehensive transportation platform 20 are located in a relatively horizontal position.

[0062] The excavator equipment 19, materials and the like are placed on the surface of the bracket 27, the walking wheels 26 of the comprehensive transportation platform 20 roll on the track 18 under the traction of the winch of the power mechanism 15, a driving mechanism can be arranged on the walking wheels 26 to guide the movement of the comprehensive transportation platform 20 together with the power mechanism 15, the extension and contraction of the hydraulic rod 28 can be dynamically adjusted according to the different slope positions of the hole of the tunnel anchor 1 where the comprehensive transportation platform 20 enters, so that the slope of the surface of the bracket 27 is relatively gentle, the extension and contraction state of the hydraulic rod 28 is adjusted again according to the need when reaching the working face, so as to facilitate the excavator or materials to be taken off the bracket 27.

[0063] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A method for slagging and transporting of a variable cross-section tunnel anchor four-track three-line, characterized by, The method comprises the following steps: S1, arranging a steel operation platform at the opening of the tunnel anchor; S2, fixedly installing a gantry crane and a power mechanism on the steel operation platform; S3, after filling construction of the inverted arch in the tunnel anchor is completed, four parallel tracks are arranged on the ground in the tunnel anchor along the extension direction of the tunnel anchor, wherein two tracks with the largest spacing form a comprehensive equipment and material transportation line, and two non-intersecting circulating slag discharge lines are formed between every two adjacent tracks; S4, a comprehensive transportation platform is arranged on the steel operation platform, the comprehensive transportation platform is connected to the power mechanism through a main cable, an excavator is placed on the comprehensive transportation platform, and the excavator is transported to the working face along the comprehensive equipment and material transportation line by the power mechanism, and a mine car is arranged behind the comprehensive transportation platform on the two circulating slag discharge lines; The gantry crane is provided with two sets, wherein the first set of gantry crane is used for hoisting the comprehensive transportation platform to the steel operation platform and hoisting the supporting material to the comprehensive transportation platform outside the opening of the tunnel anchor, and the second set of gantry crane is used for hoisting the excavator to the comprehensive transportation platform outside the opening of the tunnel anchor; S5, after the excavator reaches the working face, excavation construction is carried out, and slag is loaded by using the mine car; S6, the upper surface of the steel structure platform is further provided with a docking platform, a slag unloading area is arranged on one side of the docking platform, a slag transporting vehicle is arranged in the slag unloading area, the top surface of the docking platform is higher than the height of the slag transporting vehicle, the mine car is a side inclined hydraulic tipping mine car, a raised platform is arranged between the docking platform and the ground at the opening of the tunnel anchor, the upper surface of the raised platform is inclined, the upper end of the upper surface of the raised platform is smoothly connected to the upper surface of the docking platform, and the lower end of the upper surface of the raised platform is smoothly connected to the ground at the opening of the tunnel anchor, and the end of the track towards the outside of the tunnel anchor is sequentially extended and connected to the upper surfaces of the raised platform and the docking platform; Before the mine car reaches the opening of the tunnel anchor to unload the slag, the docking platform is arranged on the steel structure platform close to the slag unloading area, the raised platform is fixed between the docking platform and the opening of the tunnel anchor, and the tunnel extension steel segment is placed on the docking platform to raise the track, then the mine car is driven along the extended track to the docking platform to unload the slag, and the mine car is recycled to unload the slag in the slag unloading area; The steel structure platform comprises: a foundation structure comprising a bored pile foundation and an enlarged foundation arranged at the opening of the tunnel anchor, the enlarged foundation is arranged on one side close to the opening of the tunnel anchor, and the bored pile foundation is formed by rotary drilling outside the opening of the tunnel anchor and is arranged on one side away from the opening of the tunnel anchor; a support frame comprising vertically arranged steel columns, the lower end of the steel column is connected to one bored pile foundation or one enlarged foundation; a platform plate connected to the top of the support frame, and the gantry crane and the power mechanism are fixed on the platform plate; S7, after the slag discharge at the working face is completed, the comprehensive transportation platform is pulled back by the power mechanism, the supporting material is placed on the comprehensive transportation platform by the gantry crane, and then the gantry crane is moved to the working face to carry out primary support construction on the working face.

2. The method for changing the cross-section of the tunnel anchor four-track three-line of the slag discharge and transportation according to claim 1, characterized in that, After the filling construction of the inverted arch in the passing section of the large-inclination tunnel anchor main cable is completed, four tracks are arranged on the ground in the tunnel anchor along the extension direction of the tunnel anchor, the four tracks are parallel to each other and have equal intervals, wherein two tracks with the largest interval form a comprehensive equipment and material transportation line, and two tracks with the smallest interval form two circulating slag lines.

3. The method for slagging and transporting of variable cross-section tunnel anchor four-track three-line as claimed in claim 2, wherein, A pedestrian passage is also arranged on the ground in the tunnel anchor along the length direction of the tunnel anchor, and the four tracks and the pedestrian passage are located on both sides of the length direction of the tunnel anchor.

4. The method of discharging and transporting of variable cross-section tunnel anchors four-track three-line as claimed in claim 2, wherein, The tracks are sequentially connected in the length direction by steel segments with a length of 3 meters.

5. The method of discharging and transporting of variable cross-section tunnel anchors four-track three-line as claimed in claim 1, wherein, The support frame is commonly connected at the top of all the bored pile foundations and the enlarged foundations, and comprises vertically arranged steel columns, horizontal links and diagonal braces connected between adjacent steel columns, the upper ends of all the steel columns are located at the same horizontal height and are upwardly connected with horizontally arranged distribution beams; The lower end of the platform plate is a horizontally arranged Bailey beam connected at the top of all the distribution beams, and the top of all the Bailey beams is upwardly connected with a horizontally arranged steel plate on which the gantry crane and the power mechanism are fixed.

6. The method of discharging and transporting of variable cross-section tunnel anchors four-track three-line as claimed in claim 1, wherein, The comprehensive transportation platform comprises a base provided with walking wheels at the bottom, the walking wheels are slidingly connected with the corresponding tracks, a bracket is arranged on the base, one end of the bracket facing the outside of the tunnel anchor is hingedly connected with the base, a hydraulic rod is connected between the other end of the bracket facing the inside of the tunnel anchor and the corresponding end of the base, the hydraulic rod is used to change the height of the corresponding end of the bracket relative to the base by extension and retraction, when the comprehensive transportation platform is transported into the inside of the tunnel anchor along the tracks, the extension and retraction of the hydraulic rod is operated according to the change of the slope in the tunnel anchor, so that the equipment or materials on the comprehensive transportation platform are located at a relatively horizontal position.

Images