Tunnel inverted arch full-arc formwork anti-floating frame device

Abstract

The utility model belongs to the field of tunnel construction, particularly relates to an anti-floating frame device for a full-arc template of a tunnel inverted arch, and aims to solve the problems that an existing anti-floating screw rod is used for counteracting buoyancy on the template, the screw rod needs to be manufactured to be very long and anchored on a tunnel excavation outline, the longer the screw rod is, the higher the anchoring point is, and the more difficult the reinforcement is. The device comprises a full-width formwork large through beam arranged in a tunnel body, two temporary ditch large longitudinal beams are arranged on the top of the full-width formwork large through beam, and a ditch front cross beam is arranged on one side of each temporary ditch large longitudinal beam. The anti-floating requirement of a whole set of formwork can be met only through two main body gantries, the portal frame type structure does not affect passing of vehicles on the trestle bridge during anti-floating operation, meanwhile, the portal frame is independently designed and not connected with the trestle bridge, a wind belt position is reserved above the portal frame, and construction such as slag discharging, trestle bridge forward moving and formwork positioning does not interfere with one another.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to an anti-floating frame device for the full-arc formwork of the tunnel invert. Background Technique

[0002] The invert is a reverse arch structure arranged at the bottom of the tunnel to improve the stress condition of the upper support structure, which can enhance the stability of the tunnel. The invert and the secondary lining together form the overall structure of the tunnel, which helps to increase the stiffness and bearing capacity of the tunnel and can effectively enhance the stability of the tunnel. Cutting the invert helps to change the stress distribution state of the soil body, reduce the ground settlement amount, reduce the impact on the surrounding environment, and improve the traffic safety of the tunnel. Generally, it is stipulated that the invert concrete should be continuously poured in sections and formed at one time without leaving longitudinal construction joints.

[0003] In special cases, construction can be carried out in parts according to the design requirements. The invert is usually constructed to a position below the waist of the tunnel arch, and a full-arc formwork can be used to form it at one time; when pouring concrete, the full-arc invert formwork and the tunnel surface form a closed space similar to a "U" shape. Due to the large radius of the tunnel, the large height difference from the side wall to the arch bottom, and the certain fluidity of the concrete, the concrete will generate a large upward buoyancy force on the formwork. Without anti-floating measures, the positioned formwork will be displaced and misaligned. In the past, anti-floating screw rods were commonly used to offset the upward buoyancy force of the formwork. In order to make the direction of the screw rod close to the vertical state and collinear with the upward buoyancy force in the reverse direction, the screw rod needs to be made very long and anchored on the tunnel excavation contour. The longer the screw rod, the higher the anchoring point, and the more difficult it is to reinforce. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defect that in the prior art, anti-floating screw rods are used to offset the upward buoyancy force of the formwork. In order to make the direction of the screw rod close to the vertical state and collinear with the upward buoyancy force in the reverse direction, the screw rod needs to be made very long and anchored on the tunnel excavation contour. The longer the screw rod, the higher the anchoring point, and the more difficult it is to reinforce, and to provide an anti-floating frame device for the full-arc formwork of the tunnel invert.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An anti-floating frame device for the full-arc formwork of the tunnel invert, comprising a full-width formwork main girder arranged inside the tunnel main body, two temporary gutter main girders are arranged on the top of the full-width formwork main girder, a gutter front cross beam is arranged on one side of the temporary gutter main girder, a central gutter formwork and two temporary gutter formworks are arranged on one side of the gutter front cross beam, the two temporary gutter formworks are respectively arranged on both sides of the central gutter formwork, one gutter rear cross beam is arranged at one end of the two temporary gutter formworks, the same screeding frame is slidably connected to the tops of the two temporary gutter formworks, two symmetrically arranged anti-top columns are arranged on the top of the temporary gutter main girder, the same anti-floating frame longitudinal and cross girders are arranged on the tops of the two anti-top columns in the same row, the same gantry scissors brace is arranged between the two anti-top columns, a U-shaped beam trolley is arranged on one side of the anti-top column, the same anti-top cross beam is fixedly connected between the two anti-top columns on the same side, and second jacking cylinders are arranged on both sides of the top of the anti-floating frame longitudinal and cross girders.

[0007] In a possible design, a central gutter rear traveling frame is arranged at one end of the central gutter formwork, a temporary gutter rear traveling frame is arranged at one end of the temporary gutter formwork, an arc small formwork is arranged at the bottom of the full-width formwork main girder, a hinge ear connecting frame is arranged on the top of the full-width formwork main girder, a rear jacking cylinder is arranged on one side of the hinge ear connecting frame, and a drain pipe groove formwork is arranged on one side of the temporary gutter formwork.

[0008] In a possible design, a maintenance platform is arranged on the top of the anti-floating frame longitudinal and cross girders, and ladder cages are arranged on both sides of the anti-top columns.

[0009] In a possible design, the same anti-top inclined groove is fixedly connected between the anti-top cross beam and the anti-top column, a plurality of hoist hinge ears are arranged on the U-shaped beam trolley, and a filling plug is arranged at the bottom of the full-width formwork main girder.

[0010] In a possible design, the same first jacking cylinder is arranged between both sides of the anti-top column and the tunnel main body.

[0011] In a possible design, a front jacking cylinder is arranged at one end of the full-width formwork main girder, a formwork lifting cylinder is arranged inside the full-width formwork main girder, and a trestle is arranged on one side of the top of the full-width formwork main girder.

[0012] In this application, three moving methods are designed for the rear temporary side gutter formwork, the screeding frame mechanism, and the central gutter formwork:

[0013] 1. The front cross beam of the rear formwork and the longitudinal beam of the invert formwork are hinged, and the U-shaped beam of the trestle moves the front invert formwork to achieve the effect of overall movement.

[0014] 2. Remove the hinge connection pin, and the rear formwork can be moved separately from the invert formwork. After the invert formwork is moved into position, the front crossbeam of the rear formwork is lifted by the electric hoist on the U-shaped beam and then moved into position.

[0015] 3. Remove the hinge connection pin. After the invert formwork is in place, the front crossbeam of the rear formwork is lifted by the electric hoist of the main bridge of the trestle, and the whole trestle is moved into position.

[0016] Beneficial effects:

[0017] 1. This device cancels the traditional anti-floating screw rod and adopts a gantry structure. As long as two main gantries can meet the anti-floating requirements of the full set of formwork.

[0018] 2. The gantry structure does not affect the passage of vehicles on the trestle during anti-floating operation. At the same time, the gantry is independently designed without connection to the trestle, and a wind belt position is reserved above, so that the construction of mucking, trestle forward movement, formwork positioning, etc. do not interfere with each other.

[0019] 3. The anti-floating gantry is mainly composed of an anti-top column, an anti-top diagonal brace, a jacking beam and a hydraulic system. The anti-top column is fixed on the full-arc formwork connecting beam, and the upward buoyancy is transmitted to the tunnel contour through the panel - connecting beam - anti-top column - jacking beam.

[0020] 4. The anti-top column is vertically arranged, which is more conducive to the transmission of upward buoyancy and has a better anti-floating effect.

[0021] 5. A horizontal anti-top mechanism is designed on the gantry. When there is a height difference between the concrete on the left and right sides of the invert, the lateral pressures on both sides of the formwork are different, and the formwork is prone to eccentricity. By setting a horizontal anti-top frame and a horizontal anti-top oil cylinder on the gantry, the eccentricity problem of the formwork can be effectively solved.

[0022] 6. An inspection platform is set at the top of the gantry, which is convenient for inspecting the excavation situation at the top of the tunnel.

[0023] 7. Both the anti-floating mechanism and the horizontal anti-top mechanism are strengthened by oil cylinders. Through the hydraulic operation system, two people can easily complete the anti-floating work of the formwork. Compared with the previous rotation of the screw rod and anchoring, the hydraulic operation is simple and labor-saving, the oil cylinder moves faster, which can reduce the workload of workers by 70% and save 70% of the working hours.

[0024] 8. The oil cylinder is reserved with a 200mm formation to cope with the situation of over-excavation of the tunnel. Brief description of the drawings

[0025] Figure 1 It is a right-view structural schematic diagram of an anti-floating frame device for a full-arc formwork of a tunnel invert proposed by the present utility model;

[0026] Figure 2 It is a left-view structural schematic diagram of an anti-floating frame device for a full-arc formwork of a tunnel invert proposed by the present utility model excluding the anti-floating frame;

[0027] Figure 3 This is a top view structural schematic diagram of an anti-floating frame device for the full-arc formwork of a tunnel invert proposed by the present utility model;

[0028] Figure 4 This is a front view structural schematic diagram of an anti-floating frame device for the full-arc formwork of a tunnel invert proposed by the present utility model.

[0029] In the figure: 1, tunnel main body; 2, anti-top column; 3, anti-top inclined groove; 4, ladder cage; 5, first jacking oil cylinder; 9, second jacking oil cylinder; 10, maintenance platform; 11, anti-top cross beam; 12, U-shaped beam trolley; 13, hoist lifting hinge ear; 14, full-width formwork large cross beam; 15, arc small formwork; 16, temporary water channel formwork; 17, temporary water channel large longitudinal beam; 18, central water channel formwork; 19, filling plug; 20, front cross beam of water channel; 22, drain pipe groove formwork; 23, plastering frame; 24, rear cross beam of water channel; 25, hinge ear connecting frame; 26, rear walking frame of central water channel; 27, rear walking frame of temporary water channel; 28, rear jacking oil cylinder; 31, formwork lifting oil cylinder; 32, front jacking oil cylinder; 33, trestle bridge; 34, gantry scissors brace; 35, anti-floating frame longitudinal and transverse beams. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0031] Embodiment 1

[0032] Refer to Figures 1-4, an anti-floating frame device for the full-arc formwork of the tunnel invert, which is applied in the field of tunnel construction, including: a full-width formwork main beam 14 arranged inside the tunnel main body 1, two temporary gutter main beams 17 are arranged on the top of the full-width formwork main beam 14, a gutter front cross beam 20 is arranged on one side of the temporary gutter main beam 17, a central gutter formwork 18 and two temporary gutter formworks 16 are arranged on one side of the gutter front cross beam 20, the two temporary gutter formworks 16 are respectively arranged on both sides of the central gutter formwork 18, a central gutter rear traveling frame 26 is arranged at one end of the central gutter formwork 18, a temporary gutter rear traveling frame 27 is arranged at one end of the temporary gutter formwork 16, an arc small formwork 15 is arranged at the bottom of the full-width formwork main beam 14, a hinge ear connecting frame 25 is arranged on the top of the full-width formwork main beam 14, a rear jacking oil cylinder 28 is arranged on one side of the hinge ear connecting frame 25, a drain pipe groove formwork 22 is arranged on one side of the temporary gutter formwork 16, a same gutter rear cross beam 24 is arranged at one end of the two temporary gutter formworks 16, a same plastering frame 23 is slidably connected to the tops of the two temporary gutter formworks 16, two symmetrically arranged anti-top columns 2 are arranged on the top of the temporary gutter main beam 17, a horizontal anti-top mechanism is designed on the gantry. When there is a height difference in the concrete on both sides of the invert, the lateral pressures on both sides of the formwork are different, and the formwork is prone to eccentricity. By setting a horizontal anti-top frame and a horizontal anti-top oil cylinder on the gantry, the eccentricity problem of the formwork can be effectively solved. A same anti-floating frame longitudinal and transverse beam 35 is arranged on the tops of the two anti-top columns 2 in the same row, a maintenance platform 10 is arranged on the top of the anti-floating frame longitudinal and transverse beam 35, ladder cages 4 are arranged on both sides of the anti-top column 2, a same gantry scissors brace 34 is arranged between the two anti-top columns 2, a U-shaped beam trolley 12 is arranged on one side of the anti-top column 2, the anti-top column 2 is arranged vertically, which is more conducive to the transmission of the upward buoyancy force and has a better anti-floating effect. A same anti-top cross beam 11 is fixedly connected between the two anti-top columns 2 on the same side, second jacking oil cylinders 9 are arranged on both sides of the top of the anti-floating frame longitudinal and transverse beam 35, a same anti-top inclined groove 3 is fixedly connected between the anti-top cross beam 11 and the anti-top column 2, a plurality of hoist hinge ears 13 are arranged on the U-shaped beam trolley 12, a filling plug 19 is arranged at the bottom of the full-width formwork main beam 14, a same first jacking oil cylinder 5 is arranged between both sides of the anti-top column 2 and the tunnel main body 1. Both the anti-floating mechanism and the horizontal anti-top mechanism are strengthened by oil cylinders. Through the hydraulic operation system, two people can easily complete the formwork anti-floating work. Compared with the previous method of rotating the screw rod and anchoring, the hydraulic operation is simple and labor-saving, the oil cylinder moves faster, which can reduce the workload of workers by 70% and save 70% of the working hours.

[0033] Embodiment 2

[0034] Reference Figures 1-4, on the basis of Embodiment 1, the improvement is as follows: a front lifting oil cylinder 32 is arranged at one end of the full-width formwork large cross beam 14, a formwork lifting oil cylinder 31 is arranged inside the full-width formwork large cross beam 14, and a trestle 33 is arranged on one side of the top of the full-width formwork large cross beam 14.

[0035] However, as is well known to those skilled in the art, the working principles and wiring methods of the rear lifting oil cylinder 28 and the second lifting oil cylinder 9 are common knowledge, and they all belong to conventional means or well-known common knowledge, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0036] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tunnel invert full arc formwork anti-floating frame device, characterized in that: include: A full-width template beam (14) is arranged inside a tunnel body (1), two temporary ditch beams (17) are arranged on the top of the full-width template beam (14), a ditch front beam (20) is arranged on one side of the temporary ditch beam (17), a central ditch template (18) and two temporary ditch templates (16) are arranged on one side of the ditch front beam (20), the two temporary ditch templates (16) are arranged on both sides of the central ditch template (18), one end of the two temporary ditch templates (16) is provided with the same ditch rear beam (24), and the two temporary ditch templates (16) are provided with a plurality of ditch rear beams (24) at the ends of the two temporary ditch templates (16). The top is slidably connected to a same plastering frame (23); the top of the temporary ditch large longitudinal beam (17) is provided with two symmetrically arranged anti-top columns (2); the tops of the two anti-top columns (2) in the same row are provided with a same anti-floating frame longitudinal and transverse beam (35); a same portal frame scissor brace (34) is provided between the two anti-top columns (2); a U-shaped beam trolley (12) is provided on one side of the anti-top columns (2); the two anti-top columns (2) on the same side are fixedly connected with a same anti-top transverse beam (11); and second lifting cylinders (9) are provided on both sides of the top of the anti-floating frame longitudinal and transverse beams (35).

2. The anti-floating frame device for full-arc formwork of a tunnel invert according to claim 1 is characterized in that: A central ditch rear walking frame (26) is arranged at one end of the central ditch template (18), a temporary ditch rear walking frame (27) is arranged at one end of the temporary ditch template (16), a small arc template (15) is arranged at the bottom of the full-width template large through beam (14), a hinged ear connecting frame (25) is arranged at the top of the full-width template large through beam (14), a rear jacking cylinder (28) is arranged at one side of the hinged ear connecting frame (25), and a drainage pipe groove template (22) is arranged at one side of the temporary ditch template (16).

3. The anti-floating frame device for full-arc formwork of a tunnel invert according to claim 1 is characterized in that: A maintenance platform (10) is provided on the top of the longitudinal and transverse beams (35) of the anti-floating frame, and ladder cages (4) are provided on both sides of the anti-top column (2).

4. The anti-floating frame device for full-arc formwork of a tunnel invert according to claim 1 is characterized in that: The same anti-top inclined groove (3) is fixedly connected between the anti-top cross beam (11) and the anti-top column (2), a plurality of hoisting hinge ears (13) are arranged on the U-shaped beam trolley (12), and a filling plug (19) is arranged at the bottom of the full-width template large through beam (14).

5. The anti-floating frame device for full-arc formwork of a tunnel invert according to claim 1 is characterized in that: The same first jacking cylinder (5) is arranged between both sides of the anti-jacking column (2) and the tunnel body (1).

6. The anti-floating frame device for full-arc formwork of a tunnel invert according to claim 1, characterized in that: A front jacking cylinder (32) is arranged at one end of the full-width template large through beam (14), a mold lifting cylinder (31) is arranged inside the full-width template large through beam (14), and a trestle (33) is arranged on one side of the top of the full-width template large through beam (14).

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