Working platform for reserving core soil in tunnel excavation

Abstract

The utility model provides a working platform for reserving core soil in tunnel excavation, which comprises a width-adjustable supporting plate, two baffle assemblies which are respectively hinged on two sides of the bottom surface of the supporting plate and are adjustable in length, a bottom plate connected to the bottoms of the baffle assemblies, and universal wheels arranged at the bottom of the bottom plate, the lifting mechanism is arranged at the upper end of the bottom plate, and the fixing cone is arranged on the lifting mechanism and can be inserted into the ground. According to the utility model, a flat and stable working platform capable of directly standing on a station for construction operation is provided for constructors, direct operation of the constructors and equipment on core soil is effectively avoided, disturbance and damage to the core soil are reduced, the stability and integrity of the core soil are effectively guaranteed, deformation or collapse of a tunnel face is prevented, and the working efficiency is improved. And the safety risk caused by uneven terrain or core soil instability is also reduced, and the tunnel construction safety and construction quality are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering, and in particular relates to an operating platform for reserving core soil for tunnel excavation. Background Art

[0002] With the continuous advancement of urbanization and the continuous growth of traffic demand, tunnel construction is also continuously increasing; in the process of tunnel construction, unfavorable geological conditions such as weak surrounding rock are often encountered. In order to ensure the safety and stability of the face and prevent collapse and instability during tunnel excavation, the existing technology usually reserves a trapezoidal core soil with a length of not less than 3 meters, a trapezoidal width of not less than 3.5 meters, a height of not less than 3.5 meters, and an area of ​​not less than 50% of the entire cross-sectional area in the central part of the face during tunnel excavation; a reverse thrust is applied to the face through the reserved core soil to prevent the surrounding rock of the excavation face from being deformed due to squeezing. At the same time, the self-stabilizing effect of the core soil can withstand part of the soil pressure of the face, limit the deformation of the face, effectively prevent the face from collapsing, and ensure safety and stability during construction.

[0003] The design of core soil not only ensures construction safety but also brings certain convenience to tunnel construction. During tunnel construction, construction workers often use core soil as a construction platform to carry out operations such as excavation, installation of steel grids, and shotcrete spraying. Although core soil as a construction platform facilitates construction to a certain extent, it also has some disadvantages: 1. Although the self-stability of core soil helps to support the heading face, its stability is not completely reliable, especially when encountering complex geological conditions, uneven soil or abundant groundwater, the core soil may become unstable, thus endangering the safety of construction workers; 2. When construction workers and equipment frequently perform construction operations on the core soil, it will affect the structure and strength of the core soil, cause certain damage to the stability of the core soil, thereby causing deformation or collapse of the heading face, affecting the overall quality and safety of the tunnel. Summary of the invention

[0004] The utility model aims to provide a working platform for reserving core soil for tunnel excavation, so as to solve the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A working platform for reserving core soil for tunnel excavation comprises a support plate with adjustable width, two baffle assemblies respectively hinged on both sides of the bottom surface of the support plate and adjustable in length, a bottom plate connected to the bottom of the baffle assemblies, a universal wheel arranged at the bottom of the bottom plate, a lifting mechanism arranged at the upper end of the bottom plate, and a fixed cone arranged on the lifting mechanism and capable of being inserted into the ground.

[0007] Preferably, the support plate includes: a first support plate that is hollow inside and open on one side, and a second support plate that is slidably arranged in the first support plate on one side, and the two baffle assemblies are respectively arranged on the side of the first support plate away from the second support plate, and on the side of the second support plate away from the first support plate.

[0008] Preferably, a plurality of through holes are formed on the first support plate and the second support plate.

[0009] Preferably, the baffle assembly includes: two first struts hinged on the support plate, a first baffle connected between the two first struts and having the same length as the first struts, a second strut slidably arranged on the rear side wall of the first struts, a second baffle connected between the two second struts and having the same length as the second struts, a plurality of threaded holes evenly arranged on the second struts, and fixing bolts penetrating the first struts and matching the threaded holes, and two hinge seats are provided on the side walls of the base plate, and the bottom ends of the two second struts are respectively hinged to the hinge seats.

[0010] Preferably, a T-shaped sliding groove is provided on the rear side wall of the first support rod, a T-shaped sliding block is slidably connected in the T-shaped sliding groove, and the T-shaped sliding block is fixedly connected to the front side wall of the second support rod.

[0011] Preferably, the lifting mechanism includes: a scissors frame arranged on the upper end surface of the base plate, a lifting plate arranged on the upper part of the scissors frame, and a fixed cone arranged on the lower end surface of the lifting plate, the base plate is penetrated by a through hole for the fixed cone to pass through, the upper and lower ends of the scissors frame on the same side are respectively hinged and slidably connected to the lifting plate and the base plate, and the upper and lower ends on the other side are respectively hinged to the lifting plate and the base plate.

[0012] Preferably, the lower end surface of the lifting plate and the upper end surface of the base plate are both provided with a slide groove, a slider is slidably connected in the slide groove, the scissors frame is hinged to the slider, an insertion rod is provided in the slide groove of the base plate, one end of the insertion rod is connected to the slider, and the other end passes through the side wall of the slide groove.

[0013] Preferably, the middle thread of the lifting plate passes through a threaded rod, the lower end of the threaded rod is rotatably connected to the bottom plate, and a turntable is provided at the top end of the threaded rod.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. When the working platform of the utility model is installed outside the core soil, construction workers can directly perform construction operations on the platform, effectively avoiding direct operations of construction workers and equipment on the core soil, reducing disturbance and damage to the core soil, effectively ensuring the stability and integrity of the core soil, and effectively preventing deformation or collapse of the face. At the same time, it also provides a flat and stable working platform for construction workers, reducing safety risks caused by uneven terrain or instability of the core soil, and making it more convenient for construction workers to perform earth excavation and other operations, thereby improving construction efficiency;

[0016] 2. The utility model provides a width-adjustable support plate and a length-adjustable baffle assembly, so that the working platform can adapt to core soil areas of different widths and heights, thereby improving the flexibility and applicability of the platform. The baffle assembly can effectively prevent the core soil from sliding or collapsing, protect and reinforce the core soil, and ensure the safety and quality of tunnel construction;

[0017] 3. The utility model provides universal wheels at the bottom of the platform, so that the platform can be easily moved and positioned, further improving the construction efficiency of the tunnel. By providing a lifting mechanism on the bottom plate and a fixing cone on the lifting mechanism, the platform can be firmly fixed on the ground when needed, further improving the stability of the working platform, effectively preventing the platform from shaking or shifting due to external factors, and improving the safety during the construction process.

[0018] 4. The utility model can not only reduce the weight of the support plate through the through holes on the support plate, making it easier to transport and carry, but also reduce the accumulation of earth and water on the support plate, thereby reducing the pressure on the support plate, keeping the platform dry and clean, and improving the stability and safety of the working platform;

[0019] 5. The utility model cooperates with the scissor frame, the slide groove and the slider so that when the fixed cone is inserted into the ground, the insertion rod can be inserted into the palm face and tightly combined with the palm face, which not only enhances the stability of the working platform, but also improves the carrying capacity of the entire platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a structural working platform for reserving core soil for tunnel excavation;

[0022] Figure 2A schematic diagram of the structure of a baffle assembly for a working platform for reserving core soil for tunnel excavation;

[0023] Figure 3 A schematic diagram of the lifting mechanism structure of a working platform for reserving core soil for tunnel excavation;

[0024] Figure markings: 1-support plate, 2-baffle assembly, 3-bottom plate, 4-universal wheel, 5-lifting mechanism, 6-fixed cone, 7-first support plate, 8-second support plate, 9-through hole, 10-first support rod, 11-first baffle, 12-second support rod, 13-second baffle, 14-threaded hole, 15-fixing bolt, 16-scissors frame, 17-lifting plate, 18-through hole, 19-slide groove, 20-slider, 21-insertion rod, 22-threaded rod, 23-turntable. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0028] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0032] like Figure 1 and Figure 3 As shown, a working platform for reserving core soil for tunnel excavation includes a support plate 1 with adjustable width, two baffle assemblies 2 hinged on both sides of the bottom surface of the support plate 1 and adjustable in length, a bottom plate 3 connected to the bottom of the baffle assemblies 2, a universal wheel 4 arranged at the bottom of the bottom plate 3, a lifting mechanism 5 arranged on the upper end of the bottom plate 3, and a fixed cone 6 arranged on the lifting mechanism 5 and capable of being inserted into the ground.

[0033] Wherein, the support plate 1 includes: a first support plate 7 which is hollow inside and open on one side, and a second support plate 8 which is slidably arranged in the first support plate 7 on one side, and the two baffle assemblies 2 are respectively arranged on the side of the first support plate 7 away from the second support plate 8, and on the side of the second support plate 8 away from the first support plate 7.

[0034] It should be noted that when the working platform is installed outside the core soil, construction workers can directly perform construction operations on the platform, effectively avoiding direct operations of construction workers and equipment on the core soil, reducing disturbance and damage to the core soil, effectively ensuring the stability and integrity of the core soil, and effectively preventing deformation or collapse of the face. At the same time, it also provides a flat and stable working platform for construction workers, reducing safety risks caused by uneven terrain or instability of the core soil, and making it more convenient for construction workers to perform earth excavation and other operations, thereby improving construction efficiency;

[0035] Among them, the width-adjustable support plate 1 and the length-adjustable baffle assembly 2 enable the working platform to adapt to core soil areas of different widths and heights, improving the flexibility and applicability of the platform. The baffle assembly 2 can effectively prevent the core soil from sliding or collapsing, protect and reinforce the core soil, and ensure the safety and quality of tunnel construction; the setting of the universal wheel allows the platform to be easily moved and positioned, further improving the construction efficiency of the tunnel.

[0036] In order to reduce the weight of the support plate 1, facilitate transportation and handling, and reduce the accumulation of earth and water on the support plate 1, thereby reducing the pressure on the support plate 1, keeping the platform dry and clean, and improving the stability and safety of the working platform, a plurality of through holes 9 are penetrated on the first support plate 7 and the second support plate 8.

[0037] like Figure 2 As shown, the baffle assembly 2 includes: two first struts 10 hinged on the support plate 1, a first baffle 11 connected between the two first struts 10 and having the same length as the first struts 10, a second strut 12 slidably arranged on the rear side wall of the first struts 10, a second baffle 13 connected between the two second struts 12 and having the same length as the second strut 12, a plurality of threaded holes 14 evenly arranged on the second struts 12, and fixing bolts 15 penetrating the first struts 10 and matching the threaded holes 14, and two hinge seats are provided on the side wall of the base plate 3, and the bottom ends of the two second struts 12 are respectively hinged to the hinge seats.

[0038] A T-shaped sliding groove is provided on the rear side wall of the first support rod 10 , a T-shaped sliding block is slidably connected in the T-shaped sliding groove, and the T-shaped sliding block is fixedly connected to the front side wall of the second support rod 12 .

[0039] When the length of the baffle assembly needs to be adjusted, just loosen the fixing bolt to disengage it from the threaded hole, and then slide it between the first strut and the second strut. After adjusting to the appropriate length, tighten the fixing bolt to screw it into the threaded hole to fix the position of the first strut and the second strut, thereby completing the adjustment of the length of the baffle assembly. The structure is simple and the operation is convenient.

[0040] like Figure 3 The lifting mechanism includes: a scissor frame 16 arranged on the upper end surface of the base plate 3, a lifting plate 17 arranged on the upper part of the scissor frame 16, and a fixed cone 6 arranged on the lower end surface of the lifting plate 17. The base plate 3 is penetrated by a through hole 18 for the fixed cone 6 to pass through. The upper and lower ends of the scissor frame 16 on the same side are respectively hinged and slidably connected to the lifting plate 17 and the base plate 3, and the upper and lower ends on the other side are respectively hinged to the lifting plate 17 and the base plate 3.

[0041] Among them, the lower end surface of the lifting plate 17 and the upper end surface of the base plate 3 are both provided with a slide groove 19, a slider 20 is slidably connected in the slide groove 19, the scissors frame 16 is hinged to the slider 20, and an insertion rod 21 is provided in the slide groove 19 of the base plate 3, one end of the insertion rod 21 is connected to the slider 20, and the other end passes through the side wall of the slide groove 19.

[0042] The middle thread of the lifting plate 17 passes through a threaded rod 22 , the lower end of the threaded rod 22 is rotatably connected to the bottom plate 3 , and a turntable 23 is provided at the top of the threaded rod 22 .

[0043] Rotating the threaded rod can drive the lifting plate connected to the threaded rod to move up and down. When the platform needs to be firmly fixed on the ground, the lifting plate moves downward through the threaded rod, and then the fixed cone can be driven into the ground. During the downward movement of the lifting plate, the scissor frame will be squeezed, and then the slider will be driven to slide in the slide groove, and then the insertion rod can be inserted into the face and tightly combined with the face, which enhances the stability of the working platform and improves the carrying capacity of the entire platform. It effectively prevents the platform from shaking or shifting due to external factors, and improves the safety during the construction process.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described by referring to the preferred embodiments of the utility model, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A working platform for reserving core soil for tunnel excavation, characterized in that: The invention comprises a support plate (1) with adjustable width, two baffle assemblies (2) respectively hinged on both sides of the bottom surface of the support plate (1) and adjustable in length, a bottom plate (3) connected to the bottom of the baffle assembly (2), a universal wheel (4) arranged at the bottom of the bottom plate (3), a lifting mechanism (5) arranged at the upper end of the bottom plate (3), and a fixed cone (6) arranged on the lifting mechanism (5) and can be inserted into the ground; the support plate (1) comprises: a first support plate (7) with a hollow interior and an opening on one side, and a second support plate (8) with one side slidably arranged inside the first support plate (7); the two baffle assemblies (2) are respectively arranged on a side of the first support plate (7) away from the second support plate (8), and on a side of the second support plate (8) away from the first support plate (7); the The baffle assembly (2) comprises: two first support rods (10) hinged on the support plate (1), a first baffle (11) connected between the two first support rods (10) and having the same length as the first support rod (10), a second support rod (12) slidably arranged on the rear side wall of the first support rod (10), a second baffle (13) connected between the two second support rods (12) and having the same length as the second support rod (12), a plurality of threaded holes (14) evenly arranged on the second support rod (12), and fixing bolts (15) penetrating the first support rod (10) and matching the threaded holes (14), and two hinge seats are arranged on the side wall of the base plate (3), and the bottom ends of the two second support rods (12) are respectively hinged to the hinge seats.

2. The working platform for reserving core soil for tunnel excavation according to claim 1, characterized in that: A plurality of through holes (9) are provided on both the first support plate (7) and the second support plate (8).

3. The working platform for reserving core soil for tunnel excavation according to claim 1 is characterized by: A T-shaped sliding groove is provided on the rear side wall of the first support rod (10), a T-shaped sliding block is slidably connected in the T-shaped sliding groove, and the T-shaped sliding block is fixedly connected to the front side wall of the second support rod (12).

4. The working platform for reserving core soil for tunnel excavation according to claim 1 is characterized by: The lifting mechanism comprises: a scissor frame (16) arranged on the upper end surface of the base plate (3), and a lifting plate (17) arranged on the upper part of the scissor frame (16); the fixed cone (6) is arranged on the lower end surface of the lifting plate (17); a through hole (18) is penetrated through the base plate (3) for the fixed cone (6) to pass through; the upper and lower ends of the scissor frame (16) on the same side are respectively hinged and slidably connected to the lifting plate (17) and the base plate (3); the upper and lower ends on the other side are respectively hinged to the lifting plate (17) and the base plate (3).

5. The working platform for reserving core soil for tunnel excavation according to claim 4 is characterized by: The lower end surface of the lifting plate (17) and the upper end surface of the bottom plate (3) are both provided with a slide groove (19), a slider (20) is slidably connected in the slide groove (19), the scissor frame (16) is hinged with the slider (20), an insertion rod (21) is provided in the slide groove (19) of the bottom plate (3), one end of the insertion rod (21) is connected to the slider (20), and the other end passes through the side wall of the slide groove (19).

6. The working platform for reserving core soil for tunnel excavation according to claim 4 is characterized by: The middle thread of the lifting plate (17) passes through a threaded rod (22), the lower end of the threaded rod (22) is rotatably connected to the bottom plate (3), and a rotating disk (23) is provided at the top end of the threaded rod (22).

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