Supporting trolley for excavation of steep-dip-angle subsurface tunnel at metro entrance and exit

Abstract

The invention provides a subway entrance and exit steep dip angle subsurface tunnel excavation support trolley which comprises a trolley frame, a climbing channel is arranged on the trolley frame, a plurality of sets of rotatable and parallel pedals are arranged on the climbing channel, and a traction mechanism for driving the trolley frame to move is further arranged on the construction ground. A first supporting platform and a second supporting platform which are parallel to each other are hinged to the trolley frame, the second supporting platform is connected with the first supporting platform through a supporting assembly, the supporting assembly drives the second supporting platform to rotate synchronously when the second supporting platform rotates, and a driving mechanism for driving the second supporting platform to rotate is arranged on the trolley frame. And a linkage mechanism connected with the pedal is arranged on the first supporting platform. According to the trolley, the first supporting platform, the second supporting platform and the pedal can be rapidly adjusted to be horizontal, a smooth and safe construction platform is provided for workers, the operation requirement is met, the tunnel primary supporting construction quality and working efficiency are effectively improved, and the slope excavation supporting safety risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of supporting trolleys, and in particular to a supporting trolley for excavating a steep-angle dark-dig tunnel at a subway entrance or exit. Background Art

[0002] Subway entrance and exit tunnel excavation refers to the construction of the tunnel section of the subway station entrance and exit by excavating, supporting, lining and other operations through underground passages without digging up the ground. This construction method is particularly common in urban rail transit construction, especially in the central area of ​​the city, because it can minimize the impact on urban traffic and residents' lives. In the process of tunnel excavation, support trolleys are needed for support operations.

[0003] For the excavation and support of dark tunnels, disc-type work platforms and conventional rectangular work trolleys are generally used. However, when facing steep slopes with large slopes, the installation process of the disc-type work platform is complicated and cumbersome, and repeated installation and dismantling is extremely unsafe. In addition, due to the long installation time, workers stay in the unsupported section for a long time, exposed to dangerous environments, increasing safety risks. The bottom and top of the conventional rectangular work trolley are parallel to each other and are in a horizontal state, so they cannot adapt to steep slopes. If a conventional rectangular work trolley is placed on a steep slope, the walking power cannot be solved, and the top is in an inclined state, so workers cannot work safely, which reduces the quality and work efficiency of the initial support construction of the tunnel and increases the safety risk of slope excavation and support.

[0004] Therefore, in order to solve the operation requirements that cannot be achieved by conventional working platforms and to complete the excavation and support of steep-angle dark-cut tunnels more safely and effectively, a steep-angle dark-cut tunnel excavation support trolley for subway entrances and exits is proposed to solve the above technical problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a steep-angle dark-cut tunnel excavation support trolley for subway entrances and exits to solve the technical problem raised in the above background technology that the existing support trolley is not convenient for quickly leveling the workbench and the walking and climbing stairs of the staff when providing an excavation support work platform in the steep-angle dark-cut tunnel, resulting in operating requirements that cannot be met by the working platform of the conventional trolley, reducing the quality and work efficiency of the initial support construction of the tunnel, and increasing the safety risks of slope excavation support.

[0006] To achieve the above object, the present invention provides the following technical solution: a steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits, comprising:

[0007] The trolley frame is provided with a climbing passage, on which a plurality of sets of rotatable and parallelly arranged pedals are provided, and the construction ground is also provided with a traction mechanism for driving the trolley frame to move;

[0008] A first supporting platform, the end of which is hinged to the trolley frame;

[0009] A second support platform is arranged parallel to the bottom of the first support platform, and its end is hinged on the trolley frame. The second support platform is connected to the first support platform through a support assembly, and the second support platform is driven to rotate synchronously when the second support platform rotates through the support assembly;

[0010] a driving mechanism, disposed on the trolley frame and connected to the second supporting platform, so as to drive the second supporting platform to rotate along a hinge point between the second supporting platform and the trolley frame; and

[0011] The linkage mechanism is arranged on the first supporting platform to convert the rotation of the first supporting platform into driving the multiple groups of pedals to rotate synchronously.

[0012] In a preferred embodiment, the traction mechanism includes:

[0013] A track is arranged obliquely on the construction ground, and a running wheel is arranged at the bottom of the trolley frame, and the running wheel is arranged on the track;

[0014] A pulley is arranged on a side of the construction ground that is higher than the platform frame; and

[0015] The mounting frame is fixedly arranged on a side of the construction ground lower than the trolley frame. A winch is arranged on the mounting frame. A steel wire rope is arranged on the winch. The steel wire rope passes around the pulley and is connected to the trolley frame.

[0016] In a preferred embodiment, the trolley frame is a diamond-shaped frame.

[0017] In a preferred embodiment, a first mounting shaft is disposed at the end of the first supporting platform, and a second mounting shaft is disposed at the end of the second supporting platform. Both the first mounting shaft and the second mounting shaft are rotatably disposed on the trolley frame.

[0018] In a preferred embodiment, the support assembly includes multiple groups of connecting rods arranged in parallel, the two ends of the multiple groups of connecting rods are respectively hinged to the first support platform and the second support platform, and the line connecting the end points of the first mounting axis and the second mounting axis is parallel to the connecting rods.

[0019] In a preferred embodiment, the driving mechanism comprises:

[0020] A mounting seat, slidably arranged on the trolley frame, and the trolley frame is provided with a guide assembly for positioning the mounting seat;

[0021] A connecting sleeve rotatably mounted on the mounting seat;

[0022] A support seat, arranged on the second supporting platform, wherein a rotatable receiving seat is arranged inside the support seat;

[0023] A support rod, one end of which is hinged to the connecting sleeve, and the other end of which is hinged to the receiving seat; and

[0024] A propulsion assembly is arranged on the trolley frame and connected to the mounting seat to drive the mounting seat to slide.

[0025] In a preferred embodiment, the guide assembly includes:

[0026] A guide rod, disposed on the trolley frame; and

[0027] The positioning sleeve is arranged on the mounting seat, and the sliding sleeve is arranged on the guide rod.

[0028] In a preferred embodiment, the propulsion assembly comprises:

[0029] A worm gear is rotatably arranged on the trolley frame, and a rocking wheel is arranged at the end thereof, and the rocking wheel is located on the first supporting platform;

[0030] a worm wheel rotatably disposed on the trolley frame and meshing with the worm; and

[0031] The lead screw is rotatably arranged on the trolley frame and is coaxially connected with the worm gear. The mounting seat is screwed on the lead screw.

[0032] In a preferred embodiment, the linkage mechanism includes:

[0033] A connecting frame is arranged in the climbing passage, and ends of the plurality of groups of pedals are hinged on the connecting frame;

[0034] A first gear is disposed on the first mounting shaft, wherein a second gear is disposed at a hinge point of one set of the pedals on the trolley frame; and

[0035] The idler wheel is rotatably arranged on the trolley frame and meshes with the first gear and the second gear.

[0036] In a preferred embodiment, first enclosures are provided on both sides of the climbing passage, and second enclosures are provided on the first supporting platform and the second supporting platform.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] When the support trolley is in use, the trolley frame can be driven by the traction mechanism to move in the steep-angle dark-excavated tunnel, so as to bring the first support platform and the second support platform close to the construction area, which is convenient for tunnel construction. When the inclination angle of the bottom surface of the support trolley changes after the overall movement of the support trolley, the second support platform can be controlled by the driving mechanism to rotate at the hinge point between the trolley frame and the second support platform to adjust the second support platform to the horizontal level. During the rotation of the second support platform, the first support platform is driven by the support assembly to follow the rotation, and the first support platform and the second support platform are arranged in parallel, so as to quickly adjust the first support platform and the second support platform to the horizontal level. During the leveling process, the first support platform can control multiple sets of pedals to rotate synchronously to the horizontal level through the linkage mechanism, which is convenient for the staff to climb, and provides a flat and safe construction platform for the staff to meet the operation requirements, effectively improve the quality and work efficiency of the initial support construction of the tunnel, and reduce the support safety risk during slope excavation construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0040] Figure 1 A side view of a steep-angle dark-digging tunnel excavation support trolley for a subway entrance and exit provided by the present invention;

[0041] Figure 2 It is a schematic diagram of the three-dimensional structure of a steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits of the present invention;

[0042] Figure 3 for Figure 2 A magnified schematic diagram of area a in the middle;

[0043] Figure 4 for Figure 2 A magnified schematic diagram of area b;

[0044] Figure 5 This is a front view of a steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to the present invention;

[0045] Figure 6 It is a structural schematic diagram of a middle platform frame of a steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits of the present invention;

[0046] Figure 7 It is a structural schematic diagram of the first support platform in a steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits of the present invention;

[0047] Figure 8 It is a structural schematic diagram of the second supporting platform in a steep-angle dark-digging tunnel excavation supporting trolley for subway entrances and exits of the present invention.

[0048] Reference numerals:

[0049] 101, trolley frame; 102, climbing channel; 103, first enclosure; 104, walking wheel; 105, track; 106, mounting frame; 107, winch; 108, wire rope; 109, pulley;

[0050] 201, first support platform; 202, first installation shaft; 203, first gear;

[0051] 301, second supporting platform; 302, supporting seat; 303, receiving seat; 304, second mounting shaft; 305, second enclosure; 306, connecting rod;

[0052] 401, worm; 402, rocker; 403, worm wheel; 404, lead screw; 405, mounting seat; 406, positioning sleeve; 407, guide rod; 408, connecting sleeve; 409, support rod;

[0053] 501, pedal; 502, second gear; 503, idler wheel; 504, connecting frame. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technicians in this field can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0055] Example:

[0056] like Figure 1 , 2 As shown, the present invention provides a subway entrance and exit steep angle dark excavation tunnel excavation support trolley, including a trolley frame 101. A climbing channel 102 is provided on the trolley frame 101, and a plurality of sets of rotatable and parallel pedals 501 are provided on the climbing channel 102. A traction mechanism for driving the trolley frame 101 to move is also provided on the construction ground, and the traction mechanism includes a track 105 obliquely arranged on the construction ground, and a running wheel 104 is provided at the bottom of the trolley frame 101, and the running wheel 104 is arranged on the track 105. A pulley 109 is provided on the side of the construction ground higher than the trolley frame 101, and a mounting frame 106 is fixedly provided on the side of the construction ground lower than the trolley frame 101, and a winch 107 is provided on the mounting frame 106, and a steel wire rope 108 is provided on the winch 107, and the steel wire rope 108 passes around the pulley 109 and is connected to the trolley frame 101.

[0057] First, the track 105 is installed in the construction area and arranged along the extension direction of the tunnel. Then the trolley frame 101 is installed on the track 105 through the walking wheel 104, so that the trolley frame 101 can move along the track 105. The wire rope 108 can be retracted and released by starting the winch 107 to drive the trolley frame 101 to move, so as to facilitate the movement of the trolley frame 101 to the construction area. At the same time, when it is necessary to blast the tunnel, the console frame 101 can be quickly controlled to retreat to a safe area without repeated assembly and disassembly, which speeds up efficiency and indirectly ensures safety. The staff can climb to the trolley frame 101 through the pedal 501 on the climbing channel 102.

[0058] like Figure 1 , Figure 2 , Figures 5 to 8 As shown, in this embodiment, the trolley frame 101 is a diamond-shaped frame, and the first support platform 201 and the second support platform 301 are hinged on the trolley frame 101. The second support platform 301 is arranged in parallel to the bottom of the first support platform 201, and the second support platform 301 is connected to the first support platform 201 through a support assembly. When the second support platform 301 rotates, the second support platform 301 is driven to rotate synchronously by the support assembly. The support assembly includes multiple groups of connecting rods 306 arranged in parallel, and the two ends of the multiple groups of connecting rods 306 are respectively hinged to the first support platform 201 and the second support platform 301, and the line connecting the end points of the first mounting axis 202 and the second mounting axis 304 is parallel to the connecting rod 306.

[0059] The first support platform 201 is provided with a first mounting shaft 202 at the end thereof, and the second support platform 301 is provided with a second mounting shaft 304 at the end thereof. Both the first mounting shaft 202 and the second mounting shaft 304 are rotatably provided on the trolley frame 101. The trolley frame 101 with a diamond frame enables the first support platform 201 and the second support platform 301 to be as close to the excavation surface as possible when the traction mechanism controls the console frame 101 to move to the construction area, thereby improving the efficiency of the construction. The staff can climb to the first support platform 201 and the second support platform 301 through the pedal 501 to carry out the construction. The first enclosure 103 is provided on both sides of the climbing passage 102, and the second enclosure 305 is provided on the first support platform 201 and the second support platform 301. The arrangement of the first enclosure 103 and the second enclosure 305 can protect the staff and improve the safety during the construction work.

[0060] When the second support platform 301 rotates along the second installation axis 304, it can drive the first support platform 201 to rotate along the first installation axis 202 through multiple groups of parallelly arranged connecting rods 306, so that the second support platform 301 and the first support platform 201 are always arranged in parallel, that is, by separately adjusting one group of the first support platform 201 or the second support platform 301, the entire support surface of the support trolley can be adjusted at the same time.

[0061] like Figures 2 to 8 As shown, in this embodiment, a driving mechanism connected to the second support platform 301 is provided on the trolley frame 101, and the second support platform 301 is driven to rotate along the hinge point between the trolley frame 101 and the trolley frame 101 through the driving mechanism. The driving mechanism includes a mounting seat 405 slidably arranged on the trolley frame 101, a guide assembly for positioning the mounting seat 405 is arranged on the trolley frame 101, a connecting sleeve 408 is rotatably sleeved on the mounting seat 405, a supporting seat 302 is provided on the second support platform 301, a rotatable receiving seat 303 is arranged inside the supporting seat 302, a supporting rod 409 is hinged on the connecting sleeve 408, and the other end of the supporting rod 409 is hinged to the receiving seat 303.

[0062] The mounting seat 405 can be controlled to slide on the trolley frame 101 to drive the connecting sleeve 408 to move. During the movement of the connecting sleeve 408, the second support platform 301 can be pushed to rotate along the second mounting axis 304 through the support rod 409, wherein the connecting sleeve 408 can rotate on the mounting seat 405, and the receiving seat 303 can rotate in the support seat 302 to adapt to the position offset of the support rod 409, so that the sliding of the support seat 302 can be converted into controlling the rotation of the second support platform 301 on different planes.

[0063] like Figures 4 to 6 As shown, in this embodiment, the guide assembly includes a guide rod 407 arranged on the trolley frame 101, and a positioning sleeve 406 is arranged on the mounting seat 405, and the positioning sleeve 406 is slidably sleeved on the guide rod 407. The trolley frame 101 is also provided with a propulsion assembly connected to the mounting seat 405, and the mounting seat 405 is driven to slide by the propulsion assembly. The propulsion assembly includes a worm 401, a worm wheel 403 and a lead screw 404 rotatably arranged on the trolley frame 101, a rocking wheel 402 is arranged at the end of the worm 401, and the rocking wheel 402 is located on the first support platform 201, the worm wheel 403 is meshed with the worm 401, the lead screw 404 is coaxially connected with the worm wheel 403, and the mounting seat 405 is screwed on the lead screw 404.

[0064] The worm 401 can be driven to rotate by rotating the rocker 402. The worm 401 drives the lead screw 404 to rotate by meshing with the worm wheel 403 during the rotation process. Since the mounting seat 405 is positioned by the positioning sleeve 406 and the guide rod 407, the lead screw 404 can control the mounting seat 405 to slide when rotating, thereby controlling the rotation of the second support platform 301. The labor-saving structure realized by the above structure enables the staff to manually control the rotation of the second support platform 301 without the need for power supply, which is convenient for controlling the rotation of the second support platform 301 when conditions are limited.

[0065] like Figures 1 to 3As shown, in this embodiment, a linkage mechanism is provided on the first support platform 201, and the linkage mechanism converts the rotation of the first support platform 201 into driving the synchronous rotation of multiple sets of pedals 501. The linkage mechanism includes a connecting frame 504 provided in the climbing channel 102, and the ends of the multiple sets of pedals 501 are hinged on the connecting frame 504. A first gear 203 is provided on the first mounting shaft 202, and a second gear 502 is provided at a hinge point of one set of pedals 501 on the trolley frame 101. An idler wheel 503 is provided on the trolley frame 101, and the idler wheel 503 is meshed with the first gear 203 and the second gear 502.

[0066] During the rotation of the first support platform 201, the first mounting shaft 202 is driven to rotate, thereby causing the first gear 203 to rotate. During the rotation of the first gear 203, the second gear 502 is controlled by the idler wheel 503 to rotate in the same direction as the first gear 203, so that one group of pedals 501 rotates following the first support platform 201, so as to control one group of pedals 501 to remain parallel to the first support platform 201. During the movement of one group of pedals 501, multiple groups of pedals 501 are driven to follow the movement through the connecting frame 504, so that when the first support platform 201 and the second support platform 301 are leveled, multiple groups of pedals 501 are leveled following, providing a safe climbing passage 102 for the staff.

[0067] Specific usage and beneficial effects of the present invention:

[0068] When the support trolley is in use, the winch 107, track 105 and running wheel 104 can cooperate to drive the trolley frame 101 to move in a steep-angle dark-cut tunnel, so as to bring the first support platform 201 and the second support platform 301 close to the construction area to facilitate tunnel construction. When the inclination angle of the bottom surface of the support trolley changes after the overall movement, the worm 401 can be driven to rotate by rotating the rocker 402. During the rotation, the worm 401 drives the lead screw 404 to rotate by cooperating with the worm wheel 403, so that the mounting seat 405 slides along the lead screw 404. During the sliding process, the mounting seat 405 controls the second support platform 301 to rotate according to the hinge point with the trolley frame 101 through the cooperation of the connecting sleeve 408, the support rod 409 and the receiving seat 303, so as to adjust the second support platform 301 to a horizontal level. During the rotation, the second support platform 301 drives the first support platform 201 to follow the rotation through multiple groups of connecting rods 306, and the first support platform 201 and the second support platform 301 are arranged in parallel, so as to quickly adjust the first support platform 201 and the second support platform 301 to a horizontal level. During the leveling process, the first support platform 201 can drive one group of pedals 501 to rotate through the cooperation of the first gear 203, the idler wheel 503 and the second gear 502, and under the action of the connecting frame 504, multiple groups of pedals 501 can be controlled to rotate synchronously to a horizontal level, which is convenient for workers to climb and provides a flat and safe construction platform for workers to meet work needs, effectively improve the quality and work efficiency of the initial support construction of the tunnel, and reduce the support safety risks during slope excavation construction.

[0069] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments. On the basis of the present invention, some modifications or improvements can be made thereto, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A steep-angle dark-dig tunnel excavation support trolley for subway entrances and exits, characterized in that: Included are: A trolley frame (101) is provided with a climbing passage (102), the climbing passage (102) is provided with a plurality of groups of pedals (501) that are rotatable and arranged in parallel, and a traction mechanism for driving the trolley frame (101) to move is also provided on the construction ground; A first supporting platform (201), an end of which is hinged to the trolley frame (101); A second supporting platform (301) is arranged in parallel at the bottom of the first supporting platform (201), and an end portion thereof is hinged on the trolley frame (101); the second supporting platform (301) is connected to the first supporting platform (201) via a supporting assembly, and the supporting assembly drives the second supporting platform (301) to rotate synchronously when the second supporting platform (301) rotates; A driving mechanism, arranged on the trolley frame (101) and connected to the second supporting platform (301), so as to drive the second supporting platform (301) to rotate along a hinge point between the second supporting platform (301) and the trolley frame (101); and A linkage mechanism is arranged on the first supporting platform (201) to convert the rotation of the first supporting platform (201) into driving the multiple groups of pedals (501) to rotate synchronously.

2. The steep-angle dark-dig tunnel excavation support trolley for subway entrances and exits according to claim 1 is characterized in that: The traction mechanism comprises: A track (105) is arranged obliquely on the construction ground, and a running wheel (104) is arranged at the bottom of the trolley frame (101), and the running wheel (104) is arranged on the track (105); A pulley (109) is arranged on a side of the construction ground that is higher than the platform frame (101); and The mounting frame (106) is fixedly arranged on a side of the construction ground lower than the trolley frame (101); a winch (107) is arranged on the mounting frame (106); a steel wire rope (108) is arranged on the winch (107); and the steel wire rope (108) passes around the pulley (109) and is connected to the trolley frame (101).

3. The steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to claim 1 is characterized by: The trolley frame (101) is a diamond-shaped frame.

4. The steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to claim 1, characterized in that: A first mounting shaft (202) is provided at the end of the first supporting platform (201), and a second mounting shaft (304) is provided at the end of the second supporting platform (301); both the first mounting shaft (202) and the second mounting shaft (304) are rotatably arranged on the trolley frame (101).

5. The steep-angle dark-dig tunnel excavation support trolley for subway entrances and exits according to claim 4, characterized in that: The support assembly comprises a plurality of groups of connecting rods (306) arranged in parallel, the two ends of the plurality of connecting rods (306) being hinged to the first support platform (201) and the second support platform (301) respectively, and the line connecting the end points of the first installation axis (202) and the second installation axis (304) is parallel to the connecting rods (306).

6. The steep-angle dark-dig tunnel excavation support trolley for subway entrances and exits according to claim 4, characterized in that: The driving mechanism comprises: A mounting seat (405) is slidably arranged on the trolley frame (101), and a guide component for positioning the mounting seat (405) is arranged on the trolley frame (101); A connecting sleeve (408) rotatably mounted on the mounting seat (405); A support seat (302) is arranged on the second supporting platform (301), and a rotatable receiving seat (303) is arranged inside the support seat (302); A support rod (409), one end of which is hinged to the connecting sleeve (408), and the other end of which is hinged to the receiving seat (303); and A propulsion assembly is arranged on the trolley frame (101) and connected to the mounting seat (405) to drive the mounting seat (405) to slide.

7. The steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to claim 6 is characterized in that: The guide assembly comprises: A guide rod (407) is arranged on the trolley frame (101); and The positioning sleeve (406) is arranged on the mounting seat (405), and the sliding sleeve is arranged on the guide rod (407).

8. The steep-angle dark-dig tunnel excavation support trolley for subway entrances and exits according to claim 6, characterized in that: The propulsion assembly comprises: A worm (401) is rotatably arranged on the trolley frame (101), and a rocking wheel (402) is arranged at the end thereof, and the rocking wheel (402) is located on the first supporting platform (201); A worm wheel (403) is rotatably disposed on the carriage frame (101) and meshes with the worm (401); and The screw rod (404) is rotatably arranged on the trolley frame (101) and is coaxially connected to the worm gear (403). The mounting seat (405) is screwed on the screw rod (404).

9. The steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to claim 4, characterized in that: The linkage mechanism comprises: A connecting frame (504) is arranged in the climbing passage (102), and ends of the plurality of groups of pedals (501) are hinged on the connecting frame (504); A first gear (203) is arranged on the first mounting shaft (202), wherein a second gear (502) is arranged at a hinge point of one set of the pedals (501) on the trolley frame (101); and The idler wheel (503) is rotatably disposed on the trolley frame (101) and meshes with the first gear (203) and the second gear (502).

10. The steep-angle dark-digging tunnel excavation support trolley for subway entrances and exits according to claim 1, characterized in that: First enclosures (103) are provided on both sides of the climbing passage (102), and second enclosures (305) are provided on the first supporting platform (201) and the second supporting platform (301).

Images